EP1578676A2 - Pressurised dispenser for mixing and producing two-component materials - Google Patents

Pressurised dispenser for mixing and producing two-component materials

Info

Publication number
EP1578676A2
EP1578676A2 EP03813585A EP03813585A EP1578676A2 EP 1578676 A2 EP1578676 A2 EP 1578676A2 EP 03813585 A EP03813585 A EP 03813585A EP 03813585 A EP03813585 A EP 03813585A EP 1578676 A2 EP1578676 A2 EP 1578676A2
Authority
EP
European Patent Office
Prior art keywords
pressure
inner sleeve
plate
membrane
trigger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03813585A
Other languages
German (de)
French (fr)
Other versions
EP1578676B2 (en
EP1578676B1 (en
Inventor
Peter Kwasny
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Peter Kwasny GmbH
Original Assignee
Peter Kwasny GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Peter Kwasny GmbH filed Critical Peter Kwasny GmbH
Publication of EP1578676A2 publication Critical patent/EP1578676A2/en
Application granted granted Critical
Publication of EP1578676B1 publication Critical patent/EP1578676B1/en
Publication of EP1578676B2 publication Critical patent/EP1578676B2/en
Anticipated expiration legal-status Critical
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Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/68—Dispensing two or more contents, e.g. sequential dispensing or simultaneous dispensing of two or more products without mixing them
    • B65D83/682—Dispensing two or more contents, e.g. sequential dispensing or simultaneous dispensing of two or more products without mixing them the products being first separated, but finally mixed, e.g. in a dispensing head
    • B65D83/687—Dispensing two or more contents, e.g. sequential dispensing or simultaneous dispensing of two or more products without mixing them the products being first separated, but finally mixed, e.g. in a dispensing head the products being totally mixed on, or prior to, first use, e.g. by breaking an ampoule containing one of the products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/42—Filling or charging means

Definitions

  • Pressure can for mixing and dispensing two-component materials
  • the invention relates to a pressure can with a frame, a dome for receiving a valve, a domed bottom, an inner sleeve arranged on a plate, a plunger arranged in the inner sleeve for bursting open the inner sleeve, which can be actuated through the plate, the inner sleeve via a spring cage is connected to the plate, the spring cage contains a spring-loaded trigger which acts on the plunger, which plunger acts against a closure arranged at the end of the inner sleeve on the can side, and the use of such pressure sockets for two-component systems.
  • Pressure sockets of this type are particularly suitable for the storage and application of two-component sealing and insulating foams, two-component adhesives and two-component paints.
  • the invention also relates in particular to the formation of pressure cans which, in addition to the liquid substances of the main component, accommodate a second component in the inner sleeve, which reacts with the main component to form the finished product, for example a multi-component lacquer.
  • the invention can also be used for two-component formulations for other purposes, for example in surface technology or in the generation of plastic foams.
  • the substances of the main component contained in the pressure vessel are liquid and consist, for example, of a curable paint binder, solvents and the liquid propellant gas which is used to apply the component.
  • the other component is present in a relatively small amount in an inner sleeve and usually consists of a main Fast-reacting component, for example in the 2K polyisocyanate / polyol system. If necessary, catalysts can be present.
  • the component in the inner sleeve serves to influence the hardening and the quality of the product, generally by accelerating the hardening, increasing the strength or weather resistance, or the like.
  • the second component is introduced into the pressure can shortly before the foam is released by blasting off the lid of the inner container and mixed therein by shaking.
  • DE 82 27 229 U discloses a pressure cell with a one-piece base obtained by shaping a molded part made of metal.
  • the neck of an additional container which is provided with an external thread, is inserted into a recess in this base and clamped between a shoulder of the additional container and the inner edge of the base recess with the aid of a nut screwed on from the outside and deforming an O-ring seal.
  • the rod which in turn is designed and sealed by a piston-shaped seal in the interior of the additional container, is designed as a shaft which rotates in the additional container neck and is supported on the inside thereof. If the shaft is driven from the outside, this leads to the positive engagement of its inner end with the lid of the additional container, which is thereby blasted off against the internal pressure in the can.
  • the starting point of the invention is WO 85/00157 A, in which a pressure can for dispensing single- or multi-component substances is described, which has an additional container accommodating a further component in its interior.
  • the inner container has an inner lid which can be blasted off via a rod which is guided onto the bottom of the pressure cell and into the interior of the inner container.
  • the plunger is movably mounted within the additional container and inserted through a seal arranged in the crimp plate of the can base.
  • a pressure can according to WO 85/00157 A is shown in FIG. 1.
  • Both pressure cans according to the prior art have an inner sleeve which is generally made from polyolefins.
  • the preferred material is polypropylene.
  • These plastics have proven themselves in and of themselves, but they do the disadvantage that they are permeable to some propellant gas components and do not withstand solvents such as esters, ketones and aromatics sufficiently.
  • 2-component paints in particular generally contain such solvents, which previously made their use from 2-component pressure cans very difficult.
  • these cans are relatively complex and costly to manufacture. Due to the material, especially when plastic-metal parts interact, there are always tightness problems that are difficult to control and lead to incorrect batches.
  • a pressure can is known which is already improved with regard to the construction of the inner sleeve and which solves the sealing problem in the plate area by means of a molded membrane or an integration of the plate into the inner sleeve, so that no seals are required in this position ,
  • the inner sleeve still has a conventional cover, which requires an O-ring for sealing.
  • 2-component coating systems which contain aromatics as a solvent and polyisocyanates as the second component, there is a not inconsiderable immigration of both components into the sealing system with long storage times and / or high temperatures, which can lead to problems when the cover is detached.
  • the invention is therefore based on the object of developing the known pressure sockets in such a way that their inner sleeve forms an absolutely sealed unit against the content of the pressure socket.
  • a pressure can of the type mentioned at the beginning in which the closure is a membrane which hermetically seals the inner sleeve at its can end against the contents of the pressure can, and which is torn open by the plunger when the trigger is actuated.
  • the inner sleeve is now equipped on the can side with a membrane, so that in this critical area there is complete separation - without the use of conventional separate sealing elements, for example O-rings - from the remaining can contents, and the membrane can be glued to the inner sleeve or as an integral part of the inner sleeve forms, ie the inner sleeve and membrane are made in one piece.
  • the membrane itself preferably has a circumferential edge which, when the membrane is placed on, engages around the inner sleeve by a distance, for example a few millimeters, and is adhesively bonded.
  • the edge can also be provided with an internal thread and screwed to an external thread of the inner sleeve at the end on the can side; in this case, too, the sealing effect is brought about by the use of an adhesive.
  • conventional two-component adhesive systems are suitable as adhesives, for example amine-curing epoxy adhesives or amine- or OH-curing polyisocyanate adhesives.
  • adhesives for example amine-curing epoxy adhesives or amine- or OH-curing polyisocyanate adhesives.
  • the choice of adhesive depends on its resistance to the respective can contents; the most suitable adhesive system can be determined by simple tests.
  • the inner sleeve used in the pressure sockets according to the invention can be made from conventional materials, but preferably consists of aluminum. Plastic variants, for example made of polypropylene, are also possible. Where the inner sleeve is an integral part of the base plate, however, only a correspondingly pressure-resistant material, preferably aluminum, can be used in the case of pressure cans subjected to higher pressure. The use of tinplate is also possible. The techniques with which corresponding plastic and metal parts are manufactured are known per se to the person skilled in the art.
  • the inner sleeve is connected to the base plate or valve plate of the pressure cell via a spring cage.
  • the base plate is preferably a plate as used at the valve end of the pressure cell to integrate the valve unit into the can dome.
  • Such plates can be manufactured extremely simply and inexpensively. This has the advantage that separate manufacture of a part is not required for the base plate.
  • the arrangement of the inner sleeve on the valve plate in the dome of the can is particularly advantageous. In this case, the bottom plate can be omitted.
  • the inner sleeve with membrane is connected to the plate via a spring basket.
  • the inner sleeve has a receptacle on its plate-side end, which is used for positive and / or non-positive fixing on the spring cage.
  • the receptacle and the spring cage are expediently clinched or crimped to one another, the spring cage being able to have a circumferential projection or a circumferential groove to improve the fit, around or into which the receptacle is deformed or deformed. Sealing elements are not required since the membrane can reliably prevent the contents of the can from penetrating into the inner sleeve.
  • a second molded membrane is expediently located at the transition from the inner sleeve to the receptacle, which is used as described below.
  • a trigger is resiliently mounted within the spring sleeve and acts on the second membrane, through it and on the tappet in the inner sleeve.
  • the plate-side end of the trigger - referred to as a trigger pin - protrudes through the plate and out of the pressure cell.
  • the pin and trigger can form a unit, but are separated when the inner sleeve is arranged on the valve plate; in this case the trigger has a receptacle into which the pin engages to release the inner sleeve and into which a valve is inserted after the can has been released and the pin has been removed.
  • the spring travel is dimensioned so that the trigger reliably drives the plunger against the (first) membrane of the inner sleeve and tears it open.
  • a spring travel of about 5 to 10 mm is fully sufficient; the release pin of the plunger protrudes from the plate base by the same travel.
  • the can is pushed against a flat and firm surface with the pin, or the pin is pressed in by hand.
  • the spring sleeve with at least one opening in order to facilitate pressure equalization between the can space and the interior of the spring sleeve.
  • these openings also have the purpose of allowing the pressure can to be filled quickly with propellant gas through the spring cage.
  • the filling takes place with pressures of up to 60 bar;
  • a rapid pressure relief can be guaranteed. This takes place through the openings, the total cross section of which is expediently in the ratio of 3: 1 to 6: 1 to the free cross section of the filling device.
  • the membranes of the inner sleeve thus reliably close the contents of the inner sleeve against the remaining contents of the can during the storage period of the can.
  • the second membrane is pierced.
  • the plunger tears open the first membrane of the inner sleeve, so that the contents of the sleeve become free and can mix with the contents of the can.
  • the pressure cell it makes sense for the pressure cell to contain a mixing aid, for example in the form of a steel ball which can move freely therein.
  • the inner sleeve is also anchored to the base plate.
  • the spring cage is located inside the inner sleeve, on the inside of the base plate.
  • the trigger can be actuated by means of a pin through the plate of the base and, without having to pierce a membrane, acts directly on the plunger, which, as described above, tears open the membrane.
  • the formation of a unit consisting of a membrane and an inner sleeve ensures that the inner sleeve is hermetically sealed against the pressure cell contents. On the bottom side, the hermetic seal results from the fact that the inner sleeve and the curved bottom, as well as the bottom plate, are crimped together, including sealing elements.
  • the inner sleeve and (first) membrane can also be glued to one another, as previously described.
  • the spring cage is fixed in a central shape of the plate. This shape encloses the end of the spring basket which widens outwards on the bottom side and prevents the spring basket from moving into the can with the movement of the pin / trigger.
  • the tappet has a plurality of vanes along a central axis, in particular four vanes. This leads to a stabilization of the position of the tappet in the inner sleeve without an excessive volume requirement. In order to further reduce the volume of the tappet, cutouts or openings can be provided. Since the plunger and trigger form separate units, at least in the first variant, separate guiding and stabilization of the plunger is essential.
  • the tappet for example, the shape of a bevelled and sharp-edged hollow cylinder at its end on the membrane side, possibly with a tip.
  • the tappet there is a contact point between the tappet and the membrane on the periphery of the tappet, which is suitable for perforating the membrane there first and then punching out or cutting an approximately circular opening as the tappet is advanced further.
  • the inner container Since the inner container is hermetically sealed against the remaining contents of the can and is filled separately, there is automatically a pressure difference between the contents of the can and the contents of the inner sleeve. As a result, the membrane is under pressure and bulges into the inner cylinder, which leads to the membrane contacting the tappet in the area of the tappet closest to the tappet. This application promotes the tearing open of the membrane.
  • the tappet is expediently beveled at its diaphragm-side end, so that a point closest to the diaphragm is created, and has four wings for stabilization within the inner sleeve.
  • this four-wing variant is usually completely open.
  • the membrane is cut open in a cross shape and tears open completely under the pressure of the contents of the can, so that rapid mixing occurs.
  • the central Forming crimped spring basket acts against the seal, so that an escape of the can contents through the plate is excluded.
  • the seal for example a rubber seal, has the shape of a pierced circular disk, through the center of which the pin of the trigger protrudes from the pressure cell.
  • the trigger has a projection on its plate-side end, which, expediently with a projecting edge, acts against the perforated disk-shaped seal in the plate and also seals off to the outside in the area of the pin.
  • the trigger has a further projection on the plate side, directly after the sealing projection, which serves as an abutment for the helical spring guided in the spring cage.
  • An inner projection arranged on the valve-side end of the spring cage serves as a further abutment.
  • the pressure cell according to the invention is otherwise manufactured and equipped in a conventional manner. This also applies in particular to the valve area and the valve-side equipment that allows the pressure cell to be used both in manual operation and as a cartridge on spray guns.
  • Figure 1 is a pressure can with inner sleeve according to
  • Figure 2 shows an inner sleeve for an inventive pressure can according to a first embodiment to be arranged on a
  • Figure 3 shows an inner sleeve for an inventive pressure can according to a second embodiment
  • Figure 4 shows a spring cage for a pressure can according to the invention
  • Figure 5 shows a trigger for an inventive
  • Figure 6 shows an inner sleeve for a pressure cell according to the invention for arrangement on a valve plate
  • FIG. 7 shows the plate area of the embodiment according to FIG. 6.
  • Figures 1 to 7 are sectional figures.
  • the pressure cell 1 consists of a frame 2 which is closed at the upper end with a dome 3.
  • the dome 3 has a flanged edge which connects the dome and the frame to one another and at the same time brings about a tight connection of the parts.
  • the dome 3 is made from a round plate, a molded part cut out of sheet metal, which has been given the arched shape shown in the drawing by shaping.
  • the inner edge of the dome 3 is in turn flanged and receives a valve plate with a valve 4.
  • the base 5 is also connected to the frame 2 via a flanged edge and has a base plate 6 in the center, above which the inner sleeve 7 is located.
  • the inner sleeve 7 has a detachable cover 8. Inside the inner sleeve 7 . there is a plunger 9, the end of which is guided out of the pressure cell at the bottom by a sealing element 10.
  • the plunger 9 has limiting elements on both sides of the sealing element 10, both of which act against the sealing element 10 and limit the free path length of the plunger 9 within the inner container 7. To detach the lid 8 from the inner container 7, the plunger 9 is pressed into a solid surface by striking the bottom of the can and set in an upward movement.
  • the can according to FIG. 1 can be equipped with the inner sleeves according to FIG. 2, 3 or 6.
  • FIG. 2 shows an inner sleeve 7 manufactured according to the invention and used, with a plunger 9 and cover 8.
  • the inner sleeve 7 has a cylindrical wall and is closed off on the plate side by a membrane.
  • a cylindrical receptacle 18 adjoins the plate and serves to fix it on the spring cage 11.
  • the inner sleeve can be made of a suitable plastic, but is expediently made of aluminum.
  • suitable wall thicknesses for the wall are approximately 0.3 to 0.8 mm, for the two membranes approximately 0.05 to 0.10 mm.
  • the inner sleeve 7 is closed with a first membrane 8, which can be made of aluminum or plastic.
  • the membrane 8 has an edge 25 all around, which extends over the outer edge of the inner sleeve 7. Between the edge 25 and the outer wall of the inner sleeve there is a gapless layer of an adhesive 24 which is resistant to the contents of the can (both outer can and inner sleeve).
  • the plunger 9 guided in the inner sleeve 7 has four wings 17 which are cut out laterally to reduce the space requirement.
  • On the plate side there is a plate-shaped closure which is located directly on the can side of the second membrane 15.
  • On the can side the plunger 9 is chamfered in such a way that it has its point 16 closest to the membrane in the periphery; when the plunger 9 is actuated, the membrane is pierced there first.
  • the beveled cylindrical design of the plunger end 16 as a hollow cylinder with sharp edges then leads to a cylindrical opening being punched out / cut from the membrane 8.
  • the spring cage 11 itself consists of a plastic sleeve which is provided at its socket-side end with an inner circumferential projection 21 which serves as an abutment for a helical spring 13 mounted therein.
  • the coil spring 13 is supported on the plate side on a circumferential projection 22 of the solver 12. In the rest position, the spring 13 exerts a pressure on the trigger 12, so that it is pressed with its sealing seat 23 against the ring seal 20 arranged in the plate 6.
  • the trigger 12 ends at its end protruding from the plate 6 in a bolt 14 which protrudes from the can by the length that the trigger 12 has to be pushed in to blow off the cover 8 via the plunger 9.
  • the spring sleeve 11 has an extension 27 on the plate side, which engages behind the inner shape 19 of the base plate 6 and ensures an immovable fit on the base plate 6.
  • the base plate 19 which has the shape of a valve plate of a conventional aerosol can, is crimped around the seal 20 and the spring basket 11 placed thereon. The crimping process ensures a firm bond between plate 6, spring basket 11 and sealing rubber 20, due to the interaction of the indentation 28 of the plate 6 and the extension 27 of the spring basket 11.
  • the trigger 12 is divided into the section located within the spring cage and a protruding pin 14, via which the triggering process is controlled.
  • a tip 29 is located directly adjacent to the second membrane 15 and acts when actuated against the bottom end of the plunger 9.
  • the second membrane 15 is destroyed, which promotes the leakage of the contents of the inner sleeve into the can and the mixing of the two components.
  • a circumferential sealing seat 23 (FIG. 5) which projects out from the pin 14 and acts with its protruding edge against the seal 20.
  • FIG. 3 shows a second variant of an inner sleeve of a pressure cell according to the invention, in which the inner sleeve 7 and membrane 8 are integrally connected to one another.
  • the inner sleeve 7 is completely sealed off from the remaining can contents on the can and plate side.
  • Tappet 9 and spring cage 11 have the rest of the structure shown in Figure 2 and the same operation.
  • the membrane 15 is missing. A tip on the trigger 12 for penetrating the second membrane provided in FIG. 2 is therefore no longer necessary.
  • inner sleeve 7 is preferably made in one piece according to FIG. H. Inner sleeve 7 and membrane 8 are not subsequently connected to each other.
  • the wall thicknesses of sleeve 7 and membrane 8 are also in the range from 0.3 to 0.8 mm. Gluing or soldering the inner sleeve and membrane is also possible.
  • the inner sleeve 7 is crimped to both the bottom part 5 and the plate 6 with the introduction of the usual seals.
  • the spring cage is introduced into the base plate 6 in the manner described above.
  • the plunger 9 is four-winged to ensure proper guidance within the inner sleeve 7, the wings being cut out in the central area.
  • the four wings are completely formed and beveled uniformly so that a diaphragm point 16 is formed, which initiates the tearing process on the diaphragm 8 when the trigger and plunger are actuated.
  • the tearing process is due to the pressure prevailing in the can, which is significantly higher than that in the inner sleeve, and a bulging of the membrane 8 into the inner sleeve, so that it contacts the pushrod cross in the area of the next point 16 of the tappet created, promoted.
  • FIG. 4 shows a spring cage 11 which can be used according to the invention with an abutment 21 on the socket side for the helical spring mounted therein and an extension 27 provided on the plate side for crimping and fixing on the base plate 6.
  • the extension 27 in the form of a circumferential bead is accompanied by a cut 30 am inner edge and formation of a peripheral edge 31 which is pressed against the rubber seal 20 during the crimping process with the plate 6.
  • FIG. 5 finally shows a trigger 12 used according to the invention with a tip 29, the abutment 22 for the helical spring, the Pin 14 and the sealing seat 23 projecting relative to the part of the trigger and the pin 14 mounted in the spring, but recessing relative to the abutment 22, which is provided with a circumferential edge acting against the seal 20; in the sectional view, this is shown as a slight undercut.
  • FIG. 6 shows a further preferred embodiment of an inner sleeve 7 to be used according to the invention with an arrangement on a valve disk 6.
  • the arrangement of the inner sleeve on the valve plate 6 has the advantage that the aerosol can does not have to have a specially designed base area.
  • the inner sleeve 7 with plunger 9 and cover 8 has the second membrane 15 on the plate side, which hermetically seals the inner sleeve on the plate.
  • the inner sleeve 7 On the bottom side, the inner sleeve 7 has a membrane 8 screwed thereon, the outer wall of which is provided with an internal thread which interacts with an external thread on the inner sleeve 7.
  • the thread area is provided with an adhesive layer throughout for hermetic sealing.
  • the construction of the inner sleeve according to FIG. 6 corresponds to that in FIG. 2.
  • the inner sleeve 7 is plugged with its receptacle 18 onto the can-side end of the spring cage 11, so that detachment when the trigger 12 is actuated is excluded.
  • the connection expediently takes place in that the receptacle 18 is linked to the spring cage 11, preferably in such a way that the free end of the receptacle 18 is guided around an outer circumferential projection 32 (see FIG. 7) of the spring cage 11.
  • the spring cage 11 with the trigger 12 is also part of the valve mechanism, it is expedient to remove the to physically separate solver 12 from trigger pin 14.
  • the trigger 12 has a receptacle 33 for the trigger pin 14, which receives the trigger pin for the triggering process, but from which the trigger pin can be pulled out again after triggering.
  • the same receptacle then takes up a conventional spray head as used for aerosol cans. So-called female valves with lateral slots and a pin which projects into the receptacle 33 are preferred.
  • the pressure can contents can flow through the opening (s) 34 into the spring cage and can be removed from the pressure can by the actuated valve 4.
  • the openings 34 have a further function in connection with the filling of the can.
  • the filled inner sleeve with the valve plate is applied to the can dome and crimped with it.
  • the can is filled with the propellant gas through the valve opening, usually propane, butane, dimethyl ether and / or fluorocarbon (134a).
  • the can is filled with a pressure of up to 60 bar in order to keep the process as short as possible.
  • a pressure of up to 60 bar there is a risk that the membrane 15 will burst under this pressure itself or through the action of the pressure-operated trigger 12. In order to counter this danger, the gases must be released as quickly as possible after entering the can.
  • Such relaxation is achieved by arranging one or more larger passage openings 34 in the spring cage 11. It is expedient to provide these through openings 34 with an overall cross section which corresponds to three to six times the free cross section of the filling needle through which the propellant gas flows into the pressure cell.
  • the openings 34 in the valve cage 11 are provided on the plate-side end of the valve cage, as close as possible to the valve itself.
  • the valve-side sealing is carried out by a pre-provided on its plate-side end see sealing seat 23 in the form of a circumferential projection, which acts against the seal 20 between the spring cage 11 and plate 6 in the region of the central formation 19.
  • the distance of the trigger 12 to the membrane 15 must be reflected in the length of the trigger pin 14, such that the trigger pin has an overall length that the distance of the trigger 12 to the membrane and further on the path of the plunger 9, the this must cover to tear the membrane 8 corresponds.
  • the travel is designed to be correspondingly long.
  • FIG. 7 shows an illustration of the spring cage with trigger 12 according to FIG. 6 in detail.
  • the valve plate 6 has a shape 19 in its central area with an opening, into which a seal 20 in the form of a perforated circular disk, preferably made of a rubber-like material, is inserted on the can side.
  • the spring cage 11 is fixed via its extension 27.
  • the peripheral edge 31 arranged on the head side acts against the rubber seal 20 and seals the contents of the can against the central opening in the plate and in the seal 20.
  • the crimping process during the molding of the spring cage 11 into the central molding 19 of the valve disk 6 means that the individual components are connected to one another in a positive and non-positive manner and in a sealing manner.
  • the free end of the receptacle 18 is guided around an outer circumferential projection 32 of the spring cage 11.
  • the spring cage 11 has openings 34 immediately below the fixing on the valve plate, which allow the contents of the can to penetrate into the spring cage.
  • the coil spring 13 Inside the spring cage H is the coil spring 13, which is supported on an inner projection 21 of the spring cage 11 and against an outer projection 22 of the trigger 12.
  • the helical spring 13 presses the trigger 12 with its circumferential edge 23 against the sealing rubber 20, so that the pressure cell is closed in this state.
  • the trigger pin 14 is inserted into the recess 33 of the trigger 12 and pressed down vigorously so that the trigger 12 pierces the membrane 15 with its tip 29 and moves the plunger 9 below it against the membrane 8.
  • the trigger 12 After the release has taken place, the trigger 12 returns to its rest position, so that the can remains closed to the outside.
  • the sealing takes place through the interaction of the flanks of the trigger pin with the rubber seal 20.
  • a conventional valve is inserted into the recess 33, which valve is actuated by being pressed in.
  • the trigger moves a defined way into the can, so that the can contents can pass through the openings 34 unhindered into the spring cage and out of the valve.
  • the openings 34 also have the purpose of filling the already closed can with propellant gas through the central opening in the seal 20, so that the propellant gas can quickly get into the can contents.
  • the propellant gas is pressed into the spring sleeve at the intended pressure, so that the trigger 12 moves a defined distance in the direction of the diaphragm 15 without reaching it, however, so that after the Openings 34 allow the gas to escape laterally into the can while relaxing.
  • Pressure cans according to the embodiment according to FIG. 6 are used "upside down” during use, that is to say the valve points downwards.
  • Pressure sockets according to FIGS. 2 and 3 can be used upright when a riser pipe is inserted, or “upside down” if there is no riser pipe. The use with spray guns is possible and intended.

Abstract

Pressurized can comprising a body (2), a dome (3) accommodating a valve (4), a concavely shaped bottom (5), an inner casing (7) attached to a cup (6), a push rod (9) arranged in the inner casing (7), said push rod (9) being actuated through the cup (6) and intended to force open the inner casing (7), with said inner casing (7) being joined to the cup (6) via a spring cage (11), said spring cage (11) containing a spring-loaded trigger (12) which acts on the push rod (9) which, in turn, acts on a cover (8) arranged at the can-side end of the inner casing (7), said cover (8) being a membrane which seals the inner casing (7) at its can-side end hermetically against the contents of the pressurized can (1) and which is torn open by the push rod (9) when the trigger (12) is actuated.

Description

Druckdose zum Mischen und Ausbringen zweikomoonentiαer Werkstoffe Pressure can for mixing and dispensing two-component materials
Die Erfindung betrifft eine Druckdose mit einer Zarge, einem Dom zur Aufnahme eines Ventils, einem eingewölbten Boden, einer an einen Teller angeordneten Innenhülse, einem in der Innenhülse angeordneten Stößel zum Aufsprengen der Innenhülse, der durch den Teller hindurch betätigbar ist, wobei die Innenhülse über einen Federkorb mit dem Teller verbunden ist, der Federkorb einen Auslöser federnd gelagert enthält, der auf den Stößel wirkt, welcher Stößel gegen einen am dosenseitigen Ende der Innenhülse angeordneten Abschluß wirkt, sowie die Verwendung derartiger Druckdosen für 2-Komponentensysteme. Derartige Druckdosen sind insbesondere für die Lagerung und das Ausbringen von 2K-Dicht- und Isolierschäumen, 2K-Klebstoffen und 2K-Lacken geeignet.The invention relates to a pressure can with a frame, a dome for receiving a valve, a domed bottom, an inner sleeve arranged on a plate, a plunger arranged in the inner sleeve for bursting open the inner sleeve, which can be actuated through the plate, the inner sleeve via a spring cage is connected to the plate, the spring cage contains a spring-loaded trigger which acts on the plunger, which plunger acts against a closure arranged at the end of the inner sleeve on the can side, and the use of such pressure sockets for two-component systems. Pressure sockets of this type are particularly suitable for the storage and application of two-component sealing and insulating foams, two-component adhesives and two-component paints.
Die Erfindung bezieht sich insbesondere auch auf die Ausbildung von Druckdosen, welche neben den flüssigen Substanzen der Hauptkomponente in der Innenhülse eine zweite Komponente aufnehmen, die mit der Hauptkomponente zum fertigen Produkt, etwa einem Mehrkomponentenlack, reagiert. Gleicher- maßen läßt sich aber die Erfindung auch für 2K-Formulierungen für andere Zwecke einsetzen, etwa in der Oberflächentechnik oder bei der Generierung von Kunststoffschäumen.The invention also relates in particular to the formation of pressure cans which, in addition to the liquid substances of the main component, accommodate a second component in the inner sleeve, which reacts with the main component to form the finished product, for example a multi-component lacquer. At the same time, however, the invention can also be used for two-component formulations for other purposes, for example in surface technology or in the generation of plastic foams.
Die in dem Druckbehälter enthaltenen Substanzen der Hauptkomponente sind flüssig und bestehen beispielsweise aus einem härtbarem Lackbindemittel, Lösungsmitteln und dem flüssigen Treibgas, das zum Ausbringen der Komponente benutzt wird. Die weitere Komponente ist in einer relativ geringen Menge in einer Innenhülse vorhanden und besteht zumeist aus einer mit der Haupt- komponente schnell reagierenden Verbindung, etwa im 2K-System Polyiso- cyanat/Polyol. Gegebenenfalls können Katalysatoren zugegen sein. Die Komponente in der Innenhülse dient dazu, das Aushärten und die Qualität des Produktes zu beeinflussen, in der Regel durch Beschleunigung der Aushärtung, Er- höhung der Festigkeit oder Witterungsbeständigkeit, oder dergleichen. Die zweite Komponente wird in der Regel kurz vor dem Ausbringen des Schaums durch Absprengung des Deckels des Innenbehälters in die Druckdose eingebracht und durch Schütteln darin eingemischt.The substances of the main component contained in the pressure vessel are liquid and consist, for example, of a curable paint binder, solvents and the liquid propellant gas which is used to apply the component. The other component is present in a relatively small amount in an inner sleeve and usually consists of a main Fast-reacting component, for example in the 2K polyisocyanate / polyol system. If necessary, catalysts can be present. The component in the inner sleeve serves to influence the hardening and the quality of the product, generally by accelerating the hardening, increasing the strength or weather resistance, or the like. As a rule, the second component is introduced into the pressure can shortly before the foam is released by blasting off the lid of the inner container and mixed therein by shaking.
Aus DE 82 27 229 U ist eine Druckdose mit einem durch Umformen eines aus Metall bestehenden Formteils gewonnenen einteiligen Boden bekannt. In einer Aussparung dieses Bodens ist der mit einem Außengewinde versehene Hals eines Zusatzbehälters eingesetzt und mit Hilfe einer von außen aufgeschraubten Mutter unter Verformung einer O-Ringdichtung zwischen einer Schulter des Zusatzbehälters und dem inneren Rand der Bodenaussparung verspannt. Die ihrerseits durch eine kolbenförmige Dichtung im Inneren des Zusatzbehälters ausgeführte und abgedichtete Stange ist als Welle ausgebildet, die sich in dem Zusatzbehälterhals dreht und innen auf diesem abstützt. Wird die Welle von außen angetrieben, führt das zum formschlüssigen Eingriff ihres inneren Endes mit dem Deckel des Zusatzbehälters, der dadurch gegen den Innendruck in die Dose abgesprengt wird.DE 82 27 229 U discloses a pressure cell with a one-piece base obtained by shaping a molded part made of metal. The neck of an additional container, which is provided with an external thread, is inserted into a recess in this base and clamped between a shoulder of the additional container and the inner edge of the base recess with the aid of a nut screwed on from the outside and deforming an O-ring seal. The rod, which in turn is designed and sealed by a piston-shaped seal in the interior of the additional container, is designed as a shaft which rotates in the additional container neck and is supported on the inside thereof. If the shaft is driven from the outside, this leads to the positive engagement of its inner end with the lid of the additional container, which is thereby blasted off against the internal pressure in the can.
Ausgangspunkt der Erfindung ist die WO 85/00157 A, in der eine Druckdose zum Ausbringen von ein- oder mehrkomponentigen Substanzen beschrieben ist, die in ihrem Inneren einen eine weitere Komponente aufnehmenden Zusatzbehälter aufweist. Der Innenbehälter weist einen inneren Deckel auf, der über eine auf den Boden der Druckdose auf das Innere des Innenbehälters geführte Stange abgesprengt werden kann. Der Stößel ist innerhalb des Zusatzbehälters beweglich gelagert und durch eine im Sickenteller des Dosenbodens angeordnete Dichtung eingeführt. Eine Druckdose gemäß WO 85/00157 A ist in Figur 1 dargestellt.The starting point of the invention is WO 85/00157 A, in which a pressure can for dispensing single- or multi-component substances is described, which has an additional container accommodating a further component in its interior. The inner container has an inner lid which can be blasted off via a rod which is guided onto the bottom of the pressure cell and into the interior of the inner container. The plunger is movably mounted within the additional container and inserted through a seal arranged in the crimp plate of the can base. A pressure can according to WO 85/00157 A is shown in FIG. 1.
Beide Druckdosen nach dem Stand der Technik weisen eine Innenhülse auf, die in der Regel aus Polyolefinen gefertigt ist. Bevorzugtes Material ist Polypropylen. Diese Kunststoffe haben sich an und für sich bewährt, weisen aber den Nachteil auf, daß sie für einige Treibgaskomponenten durchlässig sind und Lösungsmitteln, wie Estern, Ketonen und Aromaten, nicht ausreichend Stand halten. Insbesondere 2K-Lacke enthalten in der Regel aber solche Lösungsmittel, was bisher ihre Anwendung aus 2K-Druckdosen sehr erschwerte. Darüber hinaus sind diese Dosen, wegen der Vielzahl der zur Fertigung benötigten Einzelteile und ihres Aufbaus relativ aufwendig und kostenintensiv in der Fertigung. Materialbedingt, insbesondere bei Zusammenwirkung von Kunststoff-Metallteilen kommt es immer wieder zu Dichtigkeitsproblemen, die sich nur schwer beherrschen lassen und immer wieder zu Fehlchargen führen.Both pressure cans according to the prior art have an inner sleeve which is generally made from polyolefins. The preferred material is polypropylene. These plastics have proven themselves in and of themselves, but they do the disadvantage that they are permeable to some propellant gas components and do not withstand solvents such as esters, ketones and aromatics sufficiently. However, 2-component paints in particular generally contain such solvents, which previously made their use from 2-component pressure cans very difficult. In addition, because of the large number of individual parts required for production and their construction, these cans are relatively complex and costly to manufacture. Due to the material, especially when plastic-metal parts interact, there are always tightness problems that are difficult to control and lead to incorrect batches.
Aus WO 02/076852 A1 ist eine Druckdose bekannt, die hinsichtlich des Aufbaus der Innenhülse bereits verbessert ist und das Dichtproblem im Tellerbereich durch eine angeformte Membran bzw. eine Integration des Tellers in die Innenhülse löst, so daß in dieser Position keine Dichtungen mehr benötigt werden. Die Innenhülse weist aber nach wie vor einen herkömmlichen Deckel auf, der zur Abdichtung einen O-Ring benötigt. Insbesondere bei 2 K-Lacksystemen, die Aromaten als Lösemittel und Polyisocyanate als zweite Komponente aufweisen, ergibt sich aber bei langen Lagerzeiten und/oder hohen Temperaturen eine nicht unerhebliche Einwanderung beider Komponenten in das Dichtsystem, was zu Problemen beim Absprengen des Deckels führen kann.From WO 02/076852 A1 a pressure can is known which is already improved with regard to the construction of the inner sleeve and which solves the sealing problem in the plate area by means of a molded membrane or an integration of the plate into the inner sleeve, so that no seals are required in this position , However, the inner sleeve still has a conventional cover, which requires an O-ring for sealing. Particularly in the case of 2-component coating systems which contain aromatics as a solvent and polyisocyanates as the second component, there is a not inconsiderable immigration of both components into the sealing system with long storage times and / or high temperatures, which can lead to problems when the cover is detached.
Der Erfindung liegt somit die Aufgabe zugrunde, die bekannten Druckdosen so weiterzubilden, daß deren Innenhülse eine gegen den Inhalt der Druckdose absolut dichte Einheit bildet.The invention is therefore based on the object of developing the known pressure sockets in such a way that their inner sleeve forms an absolutely sealed unit against the content of the pressure socket.
Diese Aufgabe wird mit einer Druckdose der eingangs genannten Art gelöst, bei der der Abschluß eine Membran ist, welche die Innenhülse an ihrem dosen- seitigen Ende hermetisch gegen den Inhalt der Druckdose abschließt, und die bei Betätigung des Auslösers durch den Stößel aufgerissen wird.This object is achieved with a pressure can of the type mentioned at the beginning, in which the closure is a membrane which hermetically seals the inner sleeve at its can end against the contents of the pressure can, and which is torn open by the plunger when the trigger is actuated.
Erfindungsgemäß wird nun die Innenhülse dosenseitig mit einer Membran ausgestattet, so daß in diesem kritischen Bereich eine vollständige Abtrennung - ohne die Verwendung von herkömmlichen separaten Dichtelementen, etwa O-Ringe - gegen den übrigen Doseninhalt gegeben ist, dabei kann die Membran an die Innenhülse angeklebt sein oder als integraler Teil der Innenhülse ausge- bildet sein, d. h. Innenhülse und Membran sind einstückig gefertigt. Bei der angeklebten Membran weist die Membran selbst vorzugsweise einen umlaufenden Rand auf, der bei aufgelegter Membran die Innenhülse um eine Distanz, beispielsweise einige Millimeter, umgreift und dichtend verklebt ist. Der Rand kann auch mit einem Innengewinde versehen sein und mit einem Außengewinde der Innenhülse am dosenseitigen Ende verschraubt sein; auch in diesem Fall wird die Dichtwirkung durch die Verwendung eines Klebstoffes herbeigeführt.According to the invention, the inner sleeve is now equipped on the can side with a membrane, so that in this critical area there is complete separation - without the use of conventional separate sealing elements, for example O-rings - from the remaining can contents, and the membrane can be glued to the inner sleeve or as an integral part of the inner sleeve forms, ie the inner sleeve and membrane are made in one piece. In the case of the glued-on membrane, the membrane itself preferably has a circumferential edge which, when the membrane is placed on, engages around the inner sleeve by a distance, for example a few millimeters, and is adhesively bonded. The edge can also be provided with an internal thread and screwed to an external thread of the inner sleeve at the end on the can side; in this case, too, the sealing effect is brought about by the use of an adhesive.
Als Klebstoffe kommen insbesondere herkömmliche 2 K-Klebstoffsysteme in Frage, beispielsweise aminhärtende Epoxiklebstoffe oder amin- oder OH- härtende Polyisocyanatklebstoffe. Die Auswahl des Klebstoffes hängt von dessen Beständigkeit gegen den jeweiligen Doseninhalt ab; das bestgeeignete Klebstoffsystem kann durch einfache Versuche ermittelt werden.In particular, conventional two-component adhesive systems are suitable as adhesives, for example amine-curing epoxy adhesives or amine- or OH-curing polyisocyanate adhesives. The choice of adhesive depends on its resistance to the respective can contents; the most suitable adhesive system can be determined by simple tests.
Die in den erfindungsgemäßen Druckdosen zum Einsatz kommende Innenhülse kann aus üblichen Materialien gefertigt werden, besteht vorzugsweise jedoch aus Aluminium. Kunststoffvarianten, beispielsweise aus Polypropylen, sind ebenfalls möglich. Dort, wo die Innenhülse integraler Bestandteil des Bodentellers ist, kann bei mit höherem Druck beaufschlagten Druckdosen allerdings nur ein entsprechend druckbeständiger Werkstoff verwandt werden, vorzugsweise Aluminium. Die Verwendung von Weißblech ist ebenfalls möglich. Die Techniken, mit denen entsprechende Kunststoff- und Metallteile gefertigt werden, sind dem Fachmann an und für sich bekannt.The inner sleeve used in the pressure sockets according to the invention can be made from conventional materials, but preferably consists of aluminum. Plastic variants, for example made of polypropylene, are also possible. Where the inner sleeve is an integral part of the base plate, however, only a correspondingly pressure-resistant material, preferably aluminum, can be used in the case of pressure cans subjected to higher pressure. The use of tinplate is also possible. The techniques with which corresponding plastic and metal parts are manufactured are known per se to the person skilled in the art.
Bei der erfindungsgemäßen Variante mit der an die Innenhülse angeklebten Membran ist die Innenhülse über einen Federkorb mit dem Boden- oder Ventilteller der Druckdose verbunden. Bei dem Bodenteller handelt es sich vorzugs- weise um einen Teller, wie er am ventilseitigen Ende der Druckdose zur Integration der Ventileinheit in den Dosendom eingesetzt wird. Solche Teller können außerordentlich einfach und kostengünstig gefertigt werden. Somit ergibt sich der Vorteil, daß für den Bodenteller die separate Fertigung eines Teils nicht erforderlich ist. Besonders vorteilhaft ist allerdings die Anordnung der Innenhülse am Ventilteller im Dom der Dose. In diesem Fall kann der Bodenteller entfallen. Die Innenhülse mit Membran ist über einen Federkorb mit dem Teller verbunden. Dies kann beispielsweise dadurch geschehen, daß die Innenhülse an ihrem tellerseitigen Ende eine Aufnahme hat, die zur form- und/oder kraftschlüssigen Festlegung am Federkorb dient. Zweckmäßigerweise sind Auf- nähme und Federkorb miteinander verclincht oder vercrimpt, wobei der Federkorb zur Verbesserung des Sitzes einen umlaufenden Vorsprung oder eine umlaufende Nut aufweisen kann, um den oder in die die Aufnahme herum- oder hinein verformt wird. Dichtungselemente sind nicht erforderlich, da ein Eindringen des Doseninhaltes in die Innenhülse durch die Membran zuverlässig verhindert wird. Zweckmäßigerweise befindet sich am Übergang der Innenhülse zur Aufnahme eine zweite angeformte Membran, die wie nachstehend beschrieben eingesetzt wird.In the variant according to the invention with the membrane glued to the inner sleeve, the inner sleeve is connected to the base plate or valve plate of the pressure cell via a spring cage. The base plate is preferably a plate as used at the valve end of the pressure cell to integrate the valve unit into the can dome. Such plates can be manufactured extremely simply and inexpensively. This has the advantage that separate manufacture of a part is not required for the base plate. However, the arrangement of the inner sleeve on the valve plate in the dome of the can is particularly advantageous. In this case, the bottom plate can be omitted. The inner sleeve with membrane is connected to the plate via a spring basket. This can happen, for example, in that the inner sleeve has a receptacle on its plate-side end, which is used for positive and / or non-positive fixing on the spring cage. The receptacle and the spring cage are expediently clinched or crimped to one another, the spring cage being able to have a circumferential projection or a circumferential groove to improve the fit, around or into which the receptacle is deformed or deformed. Sealing elements are not required since the membrane can reliably prevent the contents of the can from penetrating into the inner sleeve. A second molded membrane is expediently located at the transition from the inner sleeve to the receptacle, which is used as described below.
Innerhalb der Federhülse ist ein Auslöser federnd gelagert, der auf die zweite Membran, durch diese hindurch und auf den Stößel in der Innenhülse wirkt. Das tellerseitige Ende des Auslösers - als Auslösestift bezeichnet - ragt durch den Teller hindurch aus der Druckdose hinaus. Stift und Auslöser können eine Einheit bilden, sind aber bei Anordnung der Innenhülse am Ventilteller getrennt; der Auslöser weist in diesem Fall eine Aufnahme auf, in die der Stift zur Auslösung der Innenhülse eingreift, und in die nach Auslösung der Dose und Entfernung des Stiftes ein Ventil eingesetzt wird. Der Federweg ist dabei so bemessen, daß der Auslöser den Stößel zuverlässig gegen die (erste) Membran der Innenhülse treibt und diese aufreißt. Im allgemeinen ist dazu ein Federweg von etwa 5 bis 10 mm voll ausreichend; um den gleichen Federweg ragt der Auslösestift des Stößels aus dem Tellerboden heraus. Zur Betätigung des Stößels wird die Dose mit dem Stift gegen eine flache und feste Oberfläche gestoßen, oder der Stift mit der Hand eingedrückt.A trigger is resiliently mounted within the spring sleeve and acts on the second membrane, through it and on the tappet in the inner sleeve. The plate-side end of the trigger - referred to as a trigger pin - protrudes through the plate and out of the pressure cell. The pin and trigger can form a unit, but are separated when the inner sleeve is arranged on the valve plate; in this case the trigger has a receptacle into which the pin engages to release the inner sleeve and into which a valve is inserted after the can has been released and the pin has been removed. The spring travel is dimensioned so that the trigger reliably drives the plunger against the (first) membrane of the inner sleeve and tears it open. In general, a spring travel of about 5 to 10 mm is fully sufficient; the release pin of the plunger protrudes from the plate base by the same travel. To actuate the plunger, the can is pushed against a flat and firm surface with the pin, or the pin is pressed in by hand.
Es ist vorteilhaft, die Federhülse mit wenigstens einer Durchbrechung zu versehen, um den Druckausgleich zwischen Dosenraum und Innenraum der Federhülse zu erleichtern. Bei Anordnung der Innenhülse am Ventilteller haben diese Durchbrechungen auch den Zweck, eine schnelle Befüllung der Druckdose mit Treibgas durch den Federkorb hindurch zu ermöglichen. Die Befüllung erfolgt mit Drücken von bis zu 60 bar; um eine unzeitige Auslösung der Innenhülse durch Zerstörung der Membran bei der Befüllung zu vermeiden, muß eine rasche Druckentlastung gewährleistet sein. Diese erfolgt durch die Durchbrechungen, deren Gesamtquerschnitt zweckmäßigerweise im Verhältnis von 3:1 bis 6:1 zum freien Querschnitt der Befüllungsvorrichtung liegt.It is advantageous to provide the spring sleeve with at least one opening in order to facilitate pressure equalization between the can space and the interior of the spring sleeve. When the inner sleeve is arranged on the valve plate, these openings also have the purpose of allowing the pressure can to be filled quickly with propellant gas through the spring cage. The filling takes place with pressures of up to 60 bar; In order to avoid an untimely release of the inner sleeve by destroying the membrane during filling, a rapid pressure relief can be guaranteed. This takes place through the openings, the total cross section of which is expediently in the ratio of 3: 1 to 6: 1 to the free cross section of the filling device.
Die Membranen der Innenhülse schließen also den Inhalt der Innenhülse während der Lagerzeit der Dose zuverlässig gegen den übrigen Doseninhalt ab. Nach Auslösen der Dose durch Betätigung des Auslösestiftes wird die zweite Membran durchstoßen. Gleichzeitig reißt der Stößel die erste Membran der Innenhülse auf, so daß der Hülseninhalt frei wird und sich mit dem Doseninhalt vermischen kann. Zu diesem Zweck ist es sinnvoll, daß die Druckdose eine Mischhilfe enthält, beispielsweise in Form einer darin frei beweglichen Stahlkugel.The membranes of the inner sleeve thus reliably close the contents of the inner sleeve against the remaining contents of the can during the storage period of the can. After triggering the can by actuating the trigger pin, the second membrane is pierced. At the same time, the plunger tears open the first membrane of the inner sleeve, so that the contents of the sleeve become free and can mix with the contents of the can. For this purpose, it makes sense for the pressure cell to contain a mixing aid, for example in the form of a steel ball which can move freely therein.
In der alternativen Ausführungsform der erfindungsgemäßen Druckdose ist die Innenhülse zusätzlich auch an dem Bodenteller verankert. In diesem Fall befindet sich der Federkorb im Inneren der Innenhülse, auf der Innenseite des Bodentellers. Der Auslöser ist mittels Stift durch den Teller des Bodens hindurch betätigbar und wirkt, ohne eine Membran durchstoßen zu müssen, unmittelbar auf den Stößel, der, wie zuvor beschrieben, die Membran aufreißt. Durch die Ausbildung einer Einheit aus Membran und Innenhülse ist auch hier die hermetische Abschließung der Innenhülse gegen den Druckdoseninhalt gewährleistet. Bodenseitig ergibt sich die hermetische Abschließung dadurch, daß Innenhülse und eingewölbter Boden wie auch der Bodenteller unter Einschluß von Dichtelementen miteinander vercrimpt sind.In the alternative embodiment of the pressure cell according to the invention, the inner sleeve is also anchored to the base plate. In this case, the spring cage is located inside the inner sleeve, on the inside of the base plate. The trigger can be actuated by means of a pin through the plate of the base and, without having to pierce a membrane, acts directly on the plunger, which, as described above, tears open the membrane. The formation of a unit consisting of a membrane and an inner sleeve ensures that the inner sleeve is hermetically sealed against the pressure cell contents. On the bottom side, the hermetic seal results from the fact that the inner sleeve and the curved bottom, as well as the bottom plate, are crimped together, including sealing elements.
Es versteht sich, daß in dieser alternativen Ausführungsform Innenhülse und (erste) Membran ebenfalls miteinander verklebt sein können, wie zuvor be- schrieben.It goes without saying that, in this alternative embodiment, the inner sleeve and (first) membrane can also be glued to one another, as previously described.
In beiden Ausführungsformen ist der Federkorb in einer zentralen Ausformung des Tellers festgelegt. Diese Ausformung umschließt das sich bodenseitig nach außen hin erweiternde Ende des Federkorbs und verhindert, daß sich der Federkorb mit der Bewegung des Stiftes/Auslösers in die Dose hinein bewegt. Der Stößel hat in einer zweckmäßigen Ausführungsform mehrere Flügel entlang einer zentralen Achse, insbesondere vier Flügel. Dies führt zu einer Stabilisierung der Lage des Stößels in der Innenhülse, ohne daß ein übermäßiger Volumenbedarf entsteht. Um das Volumen des Stößels weiter zu vermindern, können Aussparungen oder Durchbrechungen vorgesehen sein. Da Stößel und Auslöser zumindest in der ersten Variante getrennte Einheiten bilden, ist eine separate Führung und Stabilisierung des Stößels unumgänglich.In both embodiments, the spring cage is fixed in a central shape of the plate. This shape encloses the end of the spring basket which widens outwards on the bottom side and prevents the spring basket from moving into the can with the movement of the pin / trigger. In an expedient embodiment, the tappet has a plurality of vanes along a central axis, in particular four vanes. This leads to a stabilization of the position of the tappet in the inner sleeve without an excessive volume requirement. In order to further reduce the volume of the tappet, cutouts or openings can be provided. Since the plunger and trigger form separate units, at least in the first variant, separate guiding and stabilization of the plunger is essential.
Um das Aufreißen der Membran zu erleichtern und möglichst vollständig zu gestalten, ist es zweckmäßig, dem Stößel an seinem membranseitigen Ende beispielsweise die Form eines abgeschrägten und scharfkantigen Hohlzylinders zu geben, gegebenenfalls mit einer Spitze. Hierdurch gibt es einen Kontaktpunkt zwischen Stößel und Membran an der Peripherie des Stößels, der geeignet ist, die Membran dort zunächst zu perforieren und dann bei weiterem Vortreiben des Stößels eine in etwa kreisförmige Öffnung herauszustanzen oder zu schneiden.In order to facilitate the tearing open of the membrane and to make it as complete as possible, it is expedient to give the tappet, for example, the shape of a bevelled and sharp-edged hollow cylinder at its end on the membrane side, possibly with a tip. As a result, there is a contact point between the tappet and the membrane on the periphery of the tappet, which is suitable for perforating the membrane there first and then punching out or cutting an approximately circular opening as the tappet is advanced further.
Da der Innenbehälter hermetisch gegen den übrigen Doseninhalt abgeschlossen ist und separat befüllt wird, ergibt sich automatisch eine Druckdifferenz zwischen dem Doseninhalt und dem Inhalt der Innenhülse. Hierdurch steht die Membran unter Druck und wölbst sich in den Innenzylinder hinein, was dazu führt, daß sich die Membran im Bereich des Membran-nächsten Punktes des Stößels an den Stößel anlegt. Dieses Anlegen fördert das großflächige Aufreißen der Membran.Since the inner container is hermetically sealed against the remaining contents of the can and is filled separately, there is automatically a pressure difference between the contents of the can and the contents of the inner sleeve. As a result, the membrane is under pressure and bulges into the inner cylinder, which leads to the membrane contacting the tappet in the area of the tappet closest to the tappet. This application promotes the tearing open of the membrane.
Wie bereits dargestellt, ist der Stößel an seinem membranseitigen Ende zweckmäßigerweise abgeschrägt, so daß ein Membran-nächster Punkt entsteht, und weist zur Stabilisierung innerhalb der Innenhülse vier Flügel auf. Für das Aufreißen der Membran nach Betätigung des Auslösers ist diese vierflüglige Variante in der Regel völlig aufreißend. Die Membran wird hierdurch kreuzförmig aufgeschnitten und reißt unter dem Druck des Doseninhalts völlig auf, so daß es zu einer schnellen Durchmischung kommt.As already shown, the tappet is expediently beveled at its diaphragm-side end, so that a point closest to the diaphragm is created, and has four wings for stabilization within the inner sleeve. For tearing open the membrane after actuation of the trigger, this four-wing variant is usually completely open. As a result, the membrane is cut open in a cross shape and tears open completely under the pressure of the contents of the can, so that rapid mixing occurs.
In beiden Ausführungsformen befindet sich eine Dichtung zwischen Federkorb und Teller im Bereich der zentralen Ausformung. Der in der zentralen Aus- formung festgekrimpte Federkorb wirkt dabei gegen die Dichtung, so daß ein Austreten des Doseninhaltes durch den Teller ausgeschlossen ist. Die Dichtung, beispielsweise eine Gummidichtung, hat die Form einer durchbohrten Kreisscheibe, durch deren Zentrum der Stift des Auslösers aus der Druckdose herausragt. Der Auslöser weist an seinem tellerseitigen Ende einen Vorsprung auf, der, zweckmäßigerweise mit einem vorkragenden Rand, gegen die lochscheibenförmige Dichtung im Teller wirkt und eine Abschottung auch im Bereich des Stiftes nach außen bewirkt.In both embodiments there is a seal between the spring cage and plate in the area of the central formation. The central Forming crimped spring basket acts against the seal, so that an escape of the can contents through the plate is excluded. The seal, for example a rubber seal, has the shape of a pierced circular disk, through the center of which the pin of the trigger protrudes from the pressure cell. The trigger has a projection on its plate-side end, which, expediently with a projecting edge, acts against the perforated disk-shaped seal in the plate and also seals off to the outside in the area of the pin.
Der Auslöser weist tellerseitig, direkt anschließend an den Dichtvorsprung, einen weiteren Vorsprung auf, der als Widerlager für die im Federkorb geführte Schraubenfeder dient. Als weiteres Widerlager dient ein am ventilseitigen Ende des Federkorbs angeordneter innerer Vorsprung. Die Feder sorgt für einen sicheren Sitz des Auslösers mit seinem Dichtring am Dichtgummi und erlaubt gleichzeitig das Eindrücken des Bolzens um die gewünschte Länge zur Aus- lösung der Innenhülse.The trigger has a further projection on the plate side, directly after the sealing projection, which serves as an abutment for the helical spring guided in the spring cage. An inner projection arranged on the valve-side end of the spring cage serves as a further abutment. The spring ensures that the trigger sits securely with its sealing ring on the rubber seal and at the same time allows the bolt to be pressed in by the desired length to release the inner sleeve.
Die erfindungsgemäße Druckdose ist im übrigen auf konventionelle Weise gefertigt und ausgestattet. Dies gilt insbesondere auch für den Ventilbereich, und die ventilseitige Ausstattung, die es erlaubt, die Druckdose sowohl im Handbetrieb als auch als Kartusche auf Spritzpistolen einzusetzen.The pressure cell according to the invention is otherwise manufactured and equipped in a conventional manner. This also applies in particular to the valve area and the valve-side equipment that allows the pressure cell to be used both in manual operation and as a cartridge on spray guns.
Die Erfindung wird durch die beigefügten Abbildungen näher erläutert. Es zeigenThe invention is illustrated by the accompanying figures. Show it
Figur 1 eine Druckdose mit Innenhülse gemäßFigure 1 is a pressure can with inner sleeve according to
WO 85/00157 A;WO 85/00157 A;
Figur 2 eine Innenhülse für eine erfindungsgemäße Druckdose gemäß einer ersten Ausführungsform zur Anordnung an einemFigure 2 shows an inner sleeve for an inventive pressure can according to a first embodiment to be arranged on a
Bodenteller;Bottom plate;
Figur 3 eine Innenhülse für eine erfindungsgemäße Druckdose gemäß einer zweiten Ausführungsform; Figur 4 einen Federkorb für eine erfindungsgemäße Druckdose; undFigure 3 shows an inner sleeve for an inventive pressure can according to a second embodiment; Figure 4 shows a spring cage for a pressure can according to the invention; and
Figur 5 einen Auslöser für eine erfindungsgemäßeFigure 5 shows a trigger for an inventive
Druckdose;Vacuum unit;
Figur 6 eine Innenhülse für eine erfindungsgemäße Druckdose zur Anordnung an einem Ventilteller; undFigure 6 shows an inner sleeve for a pressure cell according to the invention for arrangement on a valve plate; and
Figur 7 den Tellerbereich der Ausführungsform gemäß Figur 6.7 shows the plate area of the embodiment according to FIG. 6.
Die Figuren 1 bis 7 sind Schnittfiguren.Figures 1 to 7 are sectional figures.
Die Druckdose 1 gemäß Figur 1 besteht aus einer Zarge 2, die am oberen Ende mit einem Dom 3 verschlossen ist. Der Dom 3 weist einen umgebördelten Rand auf, der Dom und Zarge miteinander verbindet und gleichzeitig eine dichte Verbindung der Teile herbeiführt. Der Dom 3 ist aus einer runden Platte hergestellt, einem aus Blech herausgeschnittenen Formteil, das durch Umformen die aus der Zeichnung ersichtliche gewölbte Form erhalten hat. Der innere Rand des Doms 3 ist wiederum umgebördelt und nimmt einen Ventilteller mit einem Ventil 4 auf.The pressure cell 1 according to FIG. 1 consists of a frame 2 which is closed at the upper end with a dome 3. The dome 3 has a flanged edge which connects the dome and the frame to one another and at the same time brings about a tight connection of the parts. The dome 3 is made from a round plate, a molded part cut out of sheet metal, which has been given the arched shape shown in the drawing by shaping. The inner edge of the dome 3 is in turn flanged and receives a valve plate with a valve 4.
Der Boden 5 ist ebenfalls über einen umgebördelten Rand mit der Zarge 2 ver- bunden und weist in seinem Zentrum einen Bodenteller 6 auf, oberhalb dessen sich die Innenhülse 7 befindet. Die Innenhülse 7 weist einen absprengbaren Deckel 8 auf. Im Inneren der Innenhülse 7. befindet sich ein Stößel 9, dessen Ende durch ein Dichtelement 10 unten aus der Druckdose herausgeführt ist. Beidseitig zum Dichtelement 10 weist der Stößel 9 Begrenzungselemente auf, die beide gegen das Dichtelement 10 wirken und die freie Weglänge des Stößels 9 innerhalb des Innenbehälters 7 begrenzen. Zum Absprengen des Deckels 8 vom Innenbehälter 7 wird der Stößel 9 durch Aufschlagen des Dosenbodens auf eine feste Oberfläche eingedrückt und in eine Aufwärtsbewegung versetzt. Das gummielastische Dichtelement 10 fängt diese Aufwärts- bewegung auf und führt nach Absprengen des Deckels 8 den Stößel 9 in seine Ausgangsposition zurück. Die Dose gemäß Figur 1 kann erfindungsgemäß mit den Innenhülsen gemäß Figur 2, 3 oder 6 ausgerüstet werden.The base 5 is also connected to the frame 2 via a flanged edge and has a base plate 6 in the center, above which the inner sleeve 7 is located. The inner sleeve 7 has a detachable cover 8. Inside the inner sleeve 7 . there is a plunger 9, the end of which is guided out of the pressure cell at the bottom by a sealing element 10. The plunger 9 has limiting elements on both sides of the sealing element 10, both of which act against the sealing element 10 and limit the free path length of the plunger 9 within the inner container 7. To detach the lid 8 from the inner container 7, the plunger 9 is pressed into a solid surface by striking the bottom of the can and set in an upward movement. The rubber-elastic sealing element 10 absorbs this upward movement and, after the cover 8 has been blown off, guides the plunger 9 back into its starting position. According to the invention, the can according to FIG. 1 can be equipped with the inner sleeves according to FIG. 2, 3 or 6.
Figur 2 zeigt eine erfindungsgemäß gefertigte und zum Einsatz kommende Innenhülse 7 mit Stößel 9 und Deckel 8. Die Innenhülse 7 hat eine zylindrische Wand und ist tellerseitig durch eine Membran abgeschlossen. Tellerseitig schließt sich eine zylindrische Aufnahme 18 an, die zur Festlegung auf dem Federkorb 11 dient.FIG. 2 shows an inner sleeve 7 manufactured according to the invention and used, with a plunger 9 and cover 8. The inner sleeve 7 has a cylindrical wall and is closed off on the plate side by a membrane. A cylindrical receptacle 18 adjoins the plate and serves to fix it on the spring cage 11.
Die Innenhülse kann aus einem dafür geeigneten Kunststoff gefertigt sein, ist jedoch zweckmäßigerweise aus Aluminium gefertigt. Bei Fertigung aus Alumi- nium sind geeignete Wandstärken für die Wandung etwa 0,3 bis 0,8 mm, für die beiden Membranen etwa 0,05 bis 0,10 mm.The inner sleeve can be made of a suitable plastic, but is expediently made of aluminum. When manufacturing from aluminum, suitable wall thicknesses for the wall are approximately 0.3 to 0.8 mm, for the two membranes approximately 0.05 to 0.10 mm.
Dosenseitig ist die Innenhülse 7 mit einer ersten Membran 8 verschlossen, die aus Aluminium oder Kunststoff gefertigt sein kann. Die Membran 8 weist umlaufend einen Rand 25 auf, der über den Außenrand der Innenhülse 7 greift. Zwischen Rand 25 und Außenwandung der Innenhülse befindet sich eine lückenlose Schicht eines gegen den Doseninhalt (sowohl Außendose wie Innenhülse) beständigen Klebstoffs 24.On the can side, the inner sleeve 7 is closed with a first membrane 8, which can be made of aluminum or plastic. The membrane 8 has an edge 25 all around, which extends over the outer edge of the inner sleeve 7. Between the edge 25 and the outer wall of the inner sleeve there is a gapless layer of an adhesive 24 which is resistant to the contents of the can (both outer can and inner sleeve).
Der in der Innenhülse 7 geführte Stößel 9 weist vier Flügel 17 auf, die zur Verminderung des Raumbedarfs seitlich ausgeschnitten sind. Tellerseitig befindet sich ein tellerförmiger Abschluß, der sich unmittelbar dosenseitig von der zweiten Membran 15 befindet. Dosenseitig ist der Stößel 9 dergestalt abgeschrägt, daß er in der Peripherie seinen Membran-nächsten Punkt 16 aufweist; bei Betätigung des Stößels 9 wird die Membran dort zuerst durchstoßen. Die abgeschrägte zylindrische Gestaltung des Stößelendes 16 als Hohlzylinder mit scharfen Kanten führt dann zu einem Ausstanzen/-schneiden einer zylindrischen Öffnung aus der Membran 8.The plunger 9 guided in the inner sleeve 7 has four wings 17 which are cut out laterally to reduce the space requirement. On the plate side there is a plate-shaped closure which is located directly on the can side of the second membrane 15. On the can side, the plunger 9 is chamfered in such a way that it has its point 16 closest to the membrane in the periphery; when the plunger 9 is actuated, the membrane is pierced there first. The beveled cylindrical design of the plunger end 16 as a hollow cylinder with sharp edges then leads to a cylindrical opening being punched out / cut from the membrane 8.
Der Federkorb 11 selbst besteht aus einer Kunststoffhülse, die an ihrem dosenseitigen Ende mit einem innen umlaufenden Vorsprung 21 versehen ist, der als Widerlager für eine darin gelagerte Schraubenfeder 13 dient. Die Schrauben- feder 13 stützt sich tellerseitig an einen umlaufenden Vorsprung 22 des Aus- lösers 12 ab. In Ruhestellung übt die Feder 13 einen Druck auf den Auslöser 12 aus, so daß dieser mit seinem Dichtsitz 23 gegen die im Teller 6 angeordnete Ringdichtung 20 gepreßt wird. Der Auslöser 12 endet an seinem aus dem Teller 6 herausragenden Ende in einem Bolzen 14, der um die Länge aus der Dose herausragt, die der Auslöser 12 hineingestoßen werden muß, um über den Stößel 9 den Deckel 8 abzusprengen.The spring cage 11 itself consists of a plastic sleeve which is provided at its socket-side end with an inner circumferential projection 21 which serves as an abutment for a helical spring 13 mounted therein. The coil spring 13 is supported on the plate side on a circumferential projection 22 of the solver 12. In the rest position, the spring 13 exerts a pressure on the trigger 12, so that it is pressed with its sealing seat 23 against the ring seal 20 arranged in the plate 6. The trigger 12 ends at its end protruding from the plate 6 in a bolt 14 which protrudes from the can by the length that the trigger 12 has to be pushed in to blow off the cover 8 via the plunger 9.
Die Federhülse 11 weist tellerseitig eine Erweiterung 27 auf, die die innere Ausformung 19 des Bodentellers 6 hintergreift und für einen unverrückbaren Sitz am Bodenteller 6 sorgt. Bei der Fertigung wird der Bodenteller 19, der die Form eines Ventiltellers einer üblichen Aerosoldose hat, um die Dichtung 20 und den darauf aufgesetzten Federkorb 11 gekrimpt. Der Krimpvorgang sorgt für einen festen Verbund von Teller 6, Federkorb 11 und Dichtgummi 20, bedingt durch das Zusammenwirken der Einformung 28 des Tellers 6 und der Erweiterung 27 des Federkorbs 11.The spring sleeve 11 has an extension 27 on the plate side, which engages behind the inner shape 19 of the base plate 6 and ensures an immovable fit on the base plate 6. During manufacture, the base plate 19, which has the shape of a valve plate of a conventional aerosol can, is crimped around the seal 20 and the spring basket 11 placed thereon. The crimping process ensures a firm bond between plate 6, spring basket 11 and sealing rubber 20, due to the interaction of the indentation 28 of the plate 6 and the extension 27 of the spring basket 11.
Der Auslöser 12 gliedert sich in die innerhalb des Federkorbs gelegenen Abschnitt und einen herausragenden Stift 14, über den der Auslöseprozeß gesteuert wird. Eine Spitze 29 befindet sich unmittelbar angrenzend an die zweite Membran 15 und wirkt bei Betätigung gegen das bodenseitige Ende des Stößels 9. Die zweite Membran 15 wird dabei zerstört, was den Austritt des Inhaltes der Innenhülse in die Dose und die Vermischung der beiden Komponenten fördert. Unmittelbar bodenseitig angrenzend an das Widerlager 22 befindet sich ein ebenfalls umlaufender Dichtsitz 23 (Fig. 5), der gegenüber dem Stift 14 hervorspringt und mit seiner vorstehenden Kante gegen die Dichtung 20 wirkt.The trigger 12 is divided into the section located within the spring cage and a protruding pin 14, via which the triggering process is controlled. A tip 29 is located directly adjacent to the second membrane 15 and acts when actuated against the bottom end of the plunger 9. The second membrane 15 is destroyed, which promotes the leakage of the contents of the inner sleeve into the can and the mixing of the two components. Immediately on the bottom side adjacent to the abutment 22 there is also a circumferential sealing seat 23 (FIG. 5) which projects out from the pin 14 and acts with its protruding edge against the seal 20.
Figur 3 zeigt eine zweite Variante einer Innenhülse einer erfindungsgemäßen Druckdose, bei der Innenhülse 7 und Membran 8 integral miteinander verbunden sind. Auch in diesem Fall ist dosen- wie tellerseitig die Innenhülse 7 vollständig gegen den übrigen Doseninhalt abgeschottet. Stößel 9 und Federkorb 11 haben im übrigen den in Figur 2 gezeigten Aufbau und die gleiche Wirkungsweise. In der Ausführungsform gemäß Figur 3 fehlt die Membran 15. Eine Spitze am Auslöser 12 zur Durchstoßung der in Figur 2 vorgesehenen zweiten Membran ist deshalb nicht mehr erforderlich.FIG. 3 shows a second variant of an inner sleeve of a pressure cell according to the invention, in which the inner sleeve 7 and membrane 8 are integrally connected to one another. In this case, too, the inner sleeve 7 is completely sealed off from the remaining can contents on the can and plate side. Tappet 9 and spring cage 11 have the rest of the structure shown in Figure 2 and the same operation. In the embodiment according to FIG. 3, the membrane 15 is missing. A tip on the trigger 12 for penetrating the second membrane provided in FIG. 2 is therefore no longer necessary.
Es ist festzuhalten, daß die Innenhülse 7 gemäß Figur 3 vorzugsweise ein- stückig gefertigt ist, d. h. Innenhülse 7 und Membran 8 nicht nachträglich miteinander verbunden sind. Die Wandstärken von Hülse 7 und Membran 8 liegen auch hier im Bereich von 0,3 bis 0,8 mm. Ein Verkleben oder Verlöten von Innenhülse und Membran ist aber ebenfalls möglich.It should be noted that the inner sleeve 7 is preferably made in one piece according to FIG. H. Inner sleeve 7 and membrane 8 are not subsequently connected to each other. The wall thicknesses of sleeve 7 and membrane 8 are also in the range from 0.3 to 0.8 mm. Gluing or soldering the inner sleeve and membrane is also possible.
Bodenseitig ist die Innenhülse 7 sowohl mit dem Bodenteil 5 als auch mit dem Teller 6 unter Einbringung der üblichen Dichtungen vercrimpt. Der Federkorb ist auf die zuvor beschriebene Art und Weise in den Bodenteller 6 eingebracht.On the bottom side, the inner sleeve 7 is crimped to both the bottom part 5 and the plate 6 with the introduction of the usual seals. The spring cage is introduced into the base plate 6 in the manner described above.
Der Stößel 9 ist vierflügelig ausgebildet, um eine einwandfreie Führung innerhalb der Innenhülse 7 zu gewährleisten, wobei die Flügel im zentralen Bereich ausgeschnitten sind. Membranseitig sind die vier Flügel vollständig ausgebildet und gleichmäßig so abgeschrägt, daß sich ein Membran-nächster Punkt 16 ausbildet, der bei Betätigung des Auslösers und Stößels den Aufreißprozeß an der Membran 8 einleitet. Der Aufreißprozeß wird dabei durch den in der Dose herrschenden Druck, der gegenüber dem in der Innenhülse deutlich erhöht ist und ein Einbeulen der Membran 8 in die Innenhülse hinein, so daß sie sich im Bereich des Membran-nächsten Punktes 16 des Stößels 9 an das Stößelkreuz anlegt, gefördert.The plunger 9 is four-winged to ensure proper guidance within the inner sleeve 7, the wings being cut out in the central area. On the diaphragm side, the four wings are completely formed and beveled uniformly so that a diaphragm point 16 is formed, which initiates the tearing process on the diaphragm 8 when the trigger and plunger are actuated. The tearing process is due to the pressure prevailing in the can, which is significantly higher than that in the inner sleeve, and a bulging of the membrane 8 into the inner sleeve, so that it contacts the pushrod cross in the area of the next point 16 of the tappet created, promoted.
Figur 4 zeigt einen erfindungsgemäß verwendbaren Federkorb 11 mit einem dosenseitigen Widerlager 21 für die darin gelagerte Schraubenfeder und einer tellerseitig vorgesehenen Erweiterung 27 zur Eincrimpung und Festlegung am Bodenteller 6. Die Erweiterung 27 in Form eines umlaufenden Wulstes geht in dieser Ausführungsform einher mit einer Anschneidung 30 am inneren Rand und Ausformung einer umlaufenden Kante 31 , die beim Vercrimpungsprozeß mit dem Teller 6 gegen die Gummidichtung 20 gepreßt wird.FIG. 4 shows a spring cage 11 which can be used according to the invention with an abutment 21 on the socket side for the helical spring mounted therein and an extension 27 provided on the plate side for crimping and fixing on the base plate 6. In this embodiment, the extension 27 in the form of a circumferential bead is accompanied by a cut 30 am inner edge and formation of a peripheral edge 31 which is pressed against the rubber seal 20 during the crimping process with the plate 6.
Figur 5 schließlich zeigt einen erfindungsgemäß zum Einsatz kommenden Aus- löser 12 mit einer Spitze 29, dem Widerlager 22 für die Schraubenfeder, dem Stift 14 und dem gegenüber dem in der Feder gelagerten Teil des Auslösers und dem Stift 14 vorspringenden, jedoch gegenüber dem Widerlager 22 zurückspringenden Dichtsitz 23, der mit einer gegen die Dichtung 20 wirkenden umlaufenden Kante versehen ist; in der Schnittdarstellung stellt sich dies als leichte Hinterschneidung dar.FIG. 5 finally shows a trigger 12 used according to the invention with a tip 29, the abutment 22 for the helical spring, the Pin 14 and the sealing seat 23 projecting relative to the part of the trigger and the pin 14 mounted in the spring, but recessing relative to the abutment 22, which is provided with a circumferential edge acting against the seal 20; in the sectional view, this is shown as a slight undercut.
Figur 6 zeigt eine weitere bevorzugte Ausführungsform einer erfindungsgemäß einzusetzenden Innenhülse 7 mit Anordnung an einem Ventilteller 6.FIG. 6 shows a further preferred embodiment of an inner sleeve 7 to be used according to the invention with an arrangement on a valve disk 6.
Die Anordnung der Innenhülse am Ventilteller 6 hat den Vorteil, daß die Aerosoldose keinen besonders gestalteten Bodenbereich aufweisen muß. Die Innen- hülse 7 mit Stößel 9 und Deckel 8 weist tellerseitig die zweite Membran 15 auf, die die Innenhülse daran zum Teller hin hermetisch abschließt. Tellerseitig schließt sich eine zylindrische Aufnahme 18 an, die zur Festlegung am Federkorb 11 dient.The arrangement of the inner sleeve on the valve plate 6 has the advantage that the aerosol can does not have to have a specially designed base area. The inner sleeve 7 with plunger 9 and cover 8 has the second membrane 15 on the plate side, which hermetically seals the inner sleeve on the plate. On the plate side there is a cylindrical receptacle 18, which is used to fix the spring cage 11.
Bodenseitig weist die Innenhülse 7 eine darauf aufgeschraubte Membran 8 auf, deren Außenwandung mit einem Innengewinde versehen ist, das mit einem Außengewinde auf der Innenhülse 7 zusammenwirkt. Zur hermetiscrien Abdichtung ist der Gewindebereich durchgängig mit einer Klebstoffschicht versehen.On the bottom side, the inner sleeve 7 has a membrane 8 screwed thereon, the outer wall of which is provided with an internal thread which interacts with an external thread on the inner sleeve 7. The thread area is provided with an adhesive layer throughout for hermetic sealing.
Von Varianten im Auslöserbereich abgesehen, entspricht die Konstruktion der Innenhülse gemäß Figur 6 derjenigen in Figur 2.Apart from variants in the trigger area, the construction of the inner sleeve according to FIG. 6 corresponds to that in FIG. 2.
Die Innenhülse 7 ist mit ihrer Aufnahme 18 auf das dosenseitige Ende des Federkorbs 11 aufgesteckt mit diesem fest verbunden, daß ein Ablösen bei Betätigung des Auslösers 12 ausgeschlossen ist. Die Verbindung erfolgt zweckmäßigerweise dadurch, daß die Aufnahme 18 mit dem Federkorb 11 verclincht ist, bevorzugt dergestalt, daß das freie Ende der Aufnahme 18 um einen außen umlaufenden Vorsprung 32 (siehe Figur 7) des Federkorbs 11 herumgeführt ist.The inner sleeve 7 is plugged with its receptacle 18 onto the can-side end of the spring cage 11, so that detachment when the trigger 12 is actuated is excluded. The connection expediently takes place in that the receptacle 18 is linked to the spring cage 11, preferably in such a way that the free end of the receptacle 18 is guided around an outer circumferential projection 32 (see FIG. 7) of the spring cage 11.
Da in der Ausführungsform gemäß Figur 6 der Federkorb 11 mit dem Auslöser 12 zugleich Teil des Ventilmechanismus ist, ist es zweckmäßig, den Aus- löser 12 vom Auslösestift 14 körperlich zu trennen. Zu diesem Zweck weist der Auslöser 12 eine Aufnahme 33 für den Auslösestift 14 auf, die den Auslösestift für den Auslösevorgang aufnimmt, aus der der Auslösestift aber nach Auslösung wieder herausgezogen werden kann. Die gleiche Aufnahme nimmt an- schließend einen herkömmlichen Sprühkopf auf, wie er für Aerosoldosen verwandt wird. Bevorzugt sind sogenannte weibliche Ventile mit seitlichen Schlitzen und einen Zapfen, der in die Aufnahme 33 hineinragt.Since in the embodiment according to FIG. 6 the spring cage 11 with the trigger 12 is also part of the valve mechanism, it is expedient to remove the to physically separate solver 12 from trigger pin 14. For this purpose, the trigger 12 has a receptacle 33 for the trigger pin 14, which receives the trigger pin for the triggering process, but from which the trigger pin can be pulled out again after triggering. The same receptacle then takes up a conventional spray head as used for aerosol cans. So-called female valves with lateral slots and a pin which projects into the receptacle 33 are preferred.
Um den Zugang des Doseninhaltes in die Federhülse und damit zum Ventil zu erleichtern, ist es zweckmäßig, im Federkorb selbst wenigstens eine Durch- brechung 34 vorzusehen. Nach Auslösung der Innenhülse und Austausch des Auslösestiftes 14 gegen einen Sprühkopf kann der Druckdoseninhalt durch die Durchbrechung(en) 34 in den Federkorb einströmen und durch das betätigte Ventil 4 aus der Druckdose ausgebracht werden.In order to facilitate access of the can contents into the spring sleeve and thus to the valve, it is expedient to provide at least one opening 34 in the spring basket itself. After the inner sleeve has been released and the release pin 14 has been replaced by a spray head, the pressure can contents can flow through the opening (s) 34 into the spring cage and can be removed from the pressure can by the actuated valve 4.
Die Durchbrechungen 34 haben in der Ausführungsform gemäß Figur 6 eine weiteren Funktion im Zusammenhang mit der Befüllung der Dose. Nach Befüllen der Dose wird die gefüllte Innenhülse mit dem Ventilteller auf den Dosendom aufgebracht und mit diesem verkrimpt. Im Anschluß daran, wird durch die Ventilöffnung die Dose mit dem Treibgas gefüllt, in der Regel Propan, Butan, Dimethylether und/oder Fluorkohlenwasserstoff (134a). Das Befüllen der Dose erfolgt dabei mit einem Druck von bis zu 60 bar, um den Vorgang zeitlich möglichst kurz zu gestalten. Bei einem Druck von bis zu 60 bar besteht aber die Gefahr, daß die Membran 15 unter diesem Druck selbst oder durch Einwirkung des druckbetriebenen Auslösers 12 birst. Um dieser Gefahr zu begegnen, ist eine möglichst rasche Entspannung der Gase nach Eintritt in die Dose erforder- lieh. Eine solche Entspannung wird durch die Anordnung einer oder mehrere größerer Durchtrittsöffnungen 34 in den Federkorb 11 erreicht. Dabei ist es zweckmäßig, diese Durchtrittsöffnungen 34 mit einem Gesamtquerschnitt zu versehen, der das drei- bis sechsfache des freien Querschnitts der Befüllungs- nadel, durch den das Treibgas in die Druckdose einströmt, entspricht.In the embodiment according to FIG. 6, the openings 34 have a further function in connection with the filling of the can. After filling the can, the filled inner sleeve with the valve plate is applied to the can dome and crimped with it. Subsequently, the can is filled with the propellant gas through the valve opening, usually propane, butane, dimethyl ether and / or fluorocarbon (134a). The can is filled with a pressure of up to 60 bar in order to keep the process as short as possible. At a pressure of up to 60 bar, however, there is a risk that the membrane 15 will burst under this pressure itself or through the action of the pressure-operated trigger 12. In order to counter this danger, the gases must be released as quickly as possible after entering the can. Such relaxation is achieved by arranging one or more larger passage openings 34 in the spring cage 11. It is expedient to provide these through openings 34 with an overall cross section which corresponds to three to six times the free cross section of the filling needle through which the propellant gas flows into the pressure cell.
Die Durchbrechungen 34 im Ventilkorb 11 sind am tellerseitigen Ende des Ventilkorbes vorgesehen, in möglichst großer Nähe zum Ventil selbst. Die ven- tilseitige Abdichtung erfolgt durch einen an seinem tellerseitigen Ende vorge- sehenen Dichtsitz 23 in Form eines umlaufenden Vorsprungs, der gegen die Dichtung 20 zwischen Federkorb 11 und Teller 6 im Bereich der zentralen Ausformung 19 wirkt. Im Vergleich zur Ausführungsform gemäß Figur 2 ist es zweckmäßig, den Auslöser 12 in einem größeren Abstand zur Membran 15 vor- zusehen, um beim Befüllen der Druckdose mit Treibgas eine gewisse Auslenkung des Auslösers 12 ohne Gefahr für die zweite Membran 15 aufzufangen. Es versteht sich, daß der Abstand des Auslösers 12 zur Membran 15 sich in der Länge des Auslösestiftes 14 niederschlagen muß, dergestalt, daß der Auslösestift eine Gesamtlänge hat, die dem Abstand des Auslösers 12 zur Membran und weiter um den Weg des Stößels 9, den dieser zum Aufreißen der Membran 8 zurücklegen muß, entspricht. Entsprechend lang ist der Federweg ausgelegt.The openings 34 in the valve cage 11 are provided on the plate-side end of the valve cage, as close as possible to the valve itself. The valve-side sealing is carried out by a pre-provided on its plate-side end see sealing seat 23 in the form of a circumferential projection, which acts against the seal 20 between the spring cage 11 and plate 6 in the region of the central formation 19. In comparison to the embodiment according to FIG. 2, it is expedient to provide the trigger 12 at a greater distance from the membrane 15 in order to absorb a certain deflection of the trigger 12 when the pressure cell is being filled with propellant gas without any risk for the second membrane 15. It is understood that the distance of the trigger 12 to the membrane 15 must be reflected in the length of the trigger pin 14, such that the trigger pin has an overall length that the distance of the trigger 12 to the membrane and further on the path of the plunger 9, the this must cover to tear the membrane 8 corresponds. The travel is designed to be correspondingly long.
Figur 7 zeigt eine Darstellung des Federkorbs mit Auslöser 12 gemäß Figur 6 im Detail. Der Ventilteller 6 weist in seinem zentralen Bereich eine Ausformung 19 mit einer Durchbrechung auf, in die dosenseitig eine Dichtung 20 in Form einer durchbrochenen Kreisscheibe, vorzugsweise aus einem gummiartigen Material, eingesetzt ist. Im Bereich der Ausformung 19 ist der Federkorb 11 über seine Erweiterung 27 festgelegt. Die kopfseitig angeordnete umlaufende Kante 31 wirkt gegen die Gummidichtung 20 und dichtet den Doseninhalt gegen die zen- trale Öffnung im Teller und in der Dichtung 20 ab. Durch den Verkrimpungs- prozeß bei der Einformung des Federkorbs 11 in die zentrale Einformung 19 des Ventiltellers 6 sind die einzelnen Komponenten form- und kraftschlüssig sowie dichtend miteinander verbunden. Das freie Ende der Aufnahme 18 ist um einen außen umlaufenden Vorsprung 32 des Federkorbs 11 herumgeführt.FIG. 7 shows an illustration of the spring cage with trigger 12 according to FIG. 6 in detail. The valve plate 6 has a shape 19 in its central area with an opening, into which a seal 20 in the form of a perforated circular disk, preferably made of a rubber-like material, is inserted on the can side. In the area of the formation 19, the spring cage 11 is fixed via its extension 27. The peripheral edge 31 arranged on the head side acts against the rubber seal 20 and seals the contents of the can against the central opening in the plate and in the seal 20. The crimping process during the molding of the spring cage 11 into the central molding 19 of the valve disk 6 means that the individual components are connected to one another in a positive and non-positive manner and in a sealing manner. The free end of the receptacle 18 is guided around an outer circumferential projection 32 of the spring cage 11.
Der Federkorb 11 weist unmittelbar unterhalb der Festlegung am Ventilteller 6 Durchbrechungen 34 auf, die es dem Doseninhalt erlauben, in den Federkorb einzudringen. Im Inneren des Fedekorbs H befindet sich die Schraubenfeder 13, die sich auf einen inneren Vorsprung 21 des Federkorbs 11 und gegen einen äußeren Vorsprung 22 des Auslösers 12 abstützt. In entspanntem Zu- stand preßt die Schraubenfeder 13 den Auslöser 12 mit seiner umlaufenden Kante 23 gegen das Dichtgummi 20, so daß die Druckdose in diesem Zustand verschlossen ist. Zur Auslösung der Innenhülse wird in die Ausnehmung 33 des Auslösers 12 der Auslösestift 14 eingesetzt und kräftig nach unten gedrückt, so daß der Auslöser 12 mit seiner Spitze 29 die Membran 15 durchstößt und den darunter befindlichen Stößel 9 gegen die Membran 8 bewegt. Nach erfolgter Auslösung kehrt der Auslöser 12 in seine Ruheposition zurück, so daß die Dose nach außen hin verschlossen bleibt. Während des Auslösevorganges erfolgt die Abdichtung durch das Zusammenwirken der Flanken des Auslösestiftes mit der Gummidichtung 20.The spring cage 11 has openings 34 immediately below the fixing on the valve plate, which allow the contents of the can to penetrate into the spring cage. Inside the spring cage H is the coil spring 13, which is supported on an inner projection 21 of the spring cage 11 and against an outer projection 22 of the trigger 12. In a relaxed state, the helical spring 13 presses the trigger 12 with its circumferential edge 23 against the sealing rubber 20, so that the pressure cell is closed in this state. To trigger the inner sleeve, the trigger pin 14 is inserted into the recess 33 of the trigger 12 and pressed down vigorously so that the trigger 12 pierces the membrane 15 with its tip 29 and moves the plunger 9 below it against the membrane 8. After the release has taken place, the trigger 12 returns to its rest position, so that the can remains closed to the outside. During the triggering process, the sealing takes place through the interaction of the flanks of the trigger pin with the rubber seal 20.
Zum Ausbringen des Doseninhaltes wird in die Ausnehmung 33 ein herkömm- liches Ventil eingesetzt, das durch Eindrücken betätigt wird. In diesem Fall bewegt sich der Auslöser um einen definierten Weg in die Dose hinein, so daß der Doseninhalt durch die Durchbrechungen 34 ungehindert in den Federkorb hinein und aus dem Ventil hinausgelangen kann.In order to dispense the contents of the can, a conventional valve is inserted into the recess 33, which valve is actuated by being pressed in. In this case, the trigger moves a defined way into the can, so that the can contents can pass through the openings 34 unhindered into the spring cage and out of the valve.
Die Durchbrechungen 34 haben des weiteren den Zweck, ein Befüllen der be- reits verschlossenen Dose mit Treibgas durch die zentrale Öffnung in der Dichtung 20 hindurch dem Treibgas einen schnellen Weg in den Doseninhalt hinein zu ermöglichen. Hierzu wird mit der Treibgaszuführung durch die Dichtung 20 hindurch das Treibgas mit dem vorgesehenen Druck in die Federhülse eingepreßt, so daß sich der Auslöser 12 um einen definierten Weg in Richtung auf die Membran 15 bewegt, ohne diese jedoch zu erreichen, so daß nach Freiwerden der Durchbrechungen 34 das Gas unter Entspannung seitlich in die Dose entweichen kann.The openings 34 also have the purpose of filling the already closed can with propellant gas through the central opening in the seal 20, so that the propellant gas can quickly get into the can contents. For this purpose, with the propellant gas supply through the seal 20, the propellant gas is pressed into the spring sleeve at the intended pressure, so that the trigger 12 moves a defined distance in the direction of the diaphragm 15 without reaching it, however, so that after the Openings 34 allow the gas to escape laterally into the can while relaxing.
Druckdosen gemäß der Ausführungsform nach Figur 6 werden beim Gebrauch "kopfunter" eingesetzt, das heißt das Ventil weist nach unten. Druckdosen ge- maß der Figuren 2 und 3 können, bei Einbringung eines Steigrohrs, aufrecht benutzt werden, oder, bei Fehlen eines Steigrohrs, "kopfunter". Die Verwendung mit Spritzpistolen ist möglich und vorgesehen.Pressure cans according to the embodiment according to FIG. 6 are used "upside down" during use, that is to say the valve points downwards. Pressure sockets according to FIGS. 2 and 3 can be used upright when a riser pipe is inserted, or "upside down" if there is no riser pipe. The use with spray guns is possible and intended.
Im Zusammenhang sei angemerkt, daß die in der Anmeldung verwandten Begriffe "dosenseitig" eine doseneinwärts gerichtete Anordnung bezeichnet, wäh- rend "tellerseitig" eine Anordnung zum jeweiligen Teller (im Ventil- oder Bodenbereich) bezeichnet. In connection with this, it should be noted that the terms used in the application “on the can side” designate an arrangement directed toward the can, while “on the plate side” designates an arrangement for the respective plate (in the valve or base area).

Claims

Patentansprüche claims
1. Druckdose mit einer Zarge (2), einem Dom (3) zur Aufnahme eines Ventils (4), einem eingewölbten Boden (5), einer an s einem Teller (6) angeordneten Innenhülse (7), einem in der Innenhülse (7) angeordneten Stößel (9) zum Aufsprengen der Innenhülse (7), der durch den Teller (6) hindurch betätigbar ist, wobei die Innenhülse (7) über einen Federkorb (11 ) mit dem Teller (6) verbunden ist, der Federkorb (11) einen Auslöser (12) federnd gelagert enthält, der 0 auf den Stößel (9) wirkt, welcher Stößel (9) gegen einen am dosenseitigen Ende der Innenhülse (7) angeordneten Abschluß (8) wirkt, d a d u r c h g e k e n n z e i c h n e t, daß der Abschluß (8) eine Membran ist, welche die Innenhülse (7) an ihrem dosenseitigen Ende hermetisch gegen den Inhalt der Druckdose (1) abschließt, 5 und die bei Betätigung des Auslösers (12) durch den Stößel (9) aufgerissen wird.1. Pressure cell with a frame (2), a dome (3) for receiving a valve (4), a domed bottom (5), an inner sleeve (7) arranged on a plate (6), one in the inner sleeve (7 ) arranged plunger (9) for bursting open the inner sleeve (7), which can be actuated through the plate (6), the inner sleeve (7) being connected to the plate (6) via a spring basket (11), the spring basket (11 ) contains a spring-loaded trigger (12) which acts on the plunger (9), which plunger (9) acts against a closure (8) arranged on the can-side end of the inner sleeve (7), characterized in that the closure (8) is a membrane which hermetically seals the inner sleeve (7) at its can end against the contents of the pressure cell (1), 5 and which is torn open by the plunger (9) when the trigger (12) is actuated.
2. Druckdose nach Anspruch 1 , dadurch gekennzeichnet, daß die Membran (8) mit der Innenhülse (7) verklebt ist.2. Pressure can according to claim 1, characterized in that the membrane (8) is glued to the inner sleeve (7).
3. Druckdose nach Anspruch 2, dadurch gekennzeichnet, daß die 0 Membran (8) zusätzlich mit der Innenhülse (7) verschraubt ist.3. Pressure can according to claim 2, characterized in that the 0 membrane (8) is additionally screwed to the inner sleeve (7).
4. Druckdose nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die Innenhülse (7) an ihrem äußeren Ende eine Aufnahme (18) zur Festlegung am Federkorb (11 ) aufweist. 4. Pressure can according to claim 2 or 3, characterized in that the inner sleeve (7) has at its outer end a receptacle (18) for fixing to the spring cage (11).
5. Druckdose nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß eine zweite Membran (15) am Übergang der Innenhülse (7) zur Aufnahme (18) angeordnet ist.5. Pressure can according to one of claims 1 to 4, characterized in that a second membrane (15) at the transition of the inner sleeve (7) to the receptacle (18) is arranged.
6. Druckdose nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die Aufnahme (18) mit einem Federkorb (11 ) verclincht ist.6. Pressure can according to claim 4 or 5, characterized in that the receptacle (18) is clinched with a spring basket (11).
7. Druckdose nach Anspruch 6, dadurch gekennzeichnet, daß das freie Ende der Aufnahme (18) um einen außen umlaufenden Vorsprung (32) des Federkorbs (11) herumgeführt ist.7. Pressure can according to claim 6, characterized in that the free end of the receptacle (18) is guided around an outer circumferential projection (32) of the spring cage (11).
8. Druckdose nach einem der vorstehenden Ansprüche, dadurch ge- kennzeichnet, daß die Innenhülse (7) an einem Teller (6) im Boden (5) der8. Pressure can according to one of the preceding claims, characterized in that the inner sleeve (7) on a plate (6) in the bottom (5) of the
Druckdose (1) angeordnet ist.Pressure cell (1) is arranged.
9. Druckdose nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Teller (6) mit der Innenhülse (7) im Dom (2) der Druckdose (1) angeordnet ist.9. Pressure cell according to one of claims 1 to 8, characterized in that the plate (6) with the inner sleeve (7) in the dome (2) of the pressure cell (1) is arranged.
10. Druckdose nach Anspruch 9, dadurch gekennzeichnet, daß der10. Pressure can according to claim 9, characterized in that the
Auslöser (12) eine Aufnahme (33) für einen Auslösestift (14) oder einen Sprühkopf aufweist.Trigger (12) has a receptacle (33) for a trigger pin (14) or a spray head.
11. Druckdose nach Anspruch 1 , dadurch gekennzeichnet, daß die Innenhülse (7) an den im Boden (5) der Dose (1) angeordneten Teller (6) ver- ankert ist und eine angeformte Membran (8) aufweist.11. Pressure can according to claim 1, characterized in that the inner sleeve (7) is anchored to the plate (6) arranged in the base (5) of the can (1) and has a molded membrane (8).
12. Druckdose nach Anspruch 11 , dadurch gekennzeichnet, daß Innenhülse (7) und Teller (6) miteinander vercrimpt sind.12. Pressure can according to claim 11, characterized in that the inner sleeve (7) and plate (6) are crimped together.
13. Druckdose nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß der Federkorb (11 ) in einer zentralen Ausformung (19) des Tellers (6) festgelegt ist. 13. Pressure can according to one of claims 1 to 12, characterized in that the spring cage (11) is fixed in a central shape (19) of the plate (6).
14. Druckdose nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Stößel (9) mehrere Flügel (17) entlang einer zentralen Achse aufweist.14. Pressure can according to one of the preceding claims, characterized in that the plunger (9) has a plurality of wings (17) along a central axis.
15. Druckdose nach Anspruch 14, dadurch gekennzeichnet, daß der Stößel (9) an seinem dosenseitigen Ende die Form eines abgeschrägten und scharfkantigen Hohlzylinders (16) aufweist.15. Pressure can according to claim 14, characterized in that the plunger (9) has at its can end the shape of a chamfered and sharp-edged hollow cylinder (16).
16. Druckdose nach einem der Ansprüche 14 und 15, dadurch gekennzeichnet, daß die Flügel (17) Ausschnitte und/oder Ausnehmungen aufweisen.16. Pressure can according to one of claims 14 and 15, characterized in that the wings (17) have cutouts and / or recesses.
17. Druckdose nach einem der vorstehenden Ansprüche, gekennzeichnet durch eine Dichtung (20) zwischen Federkorb (11 ) und Teller (6) im Bereich der zentralen Ausformung (19).17. Pressure can according to one of the preceding claims, characterized by a seal (20) between the spring cage (11) and plate (6) in the region of the central formation (19).
18. Druckdose nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Federkorb (11 ) einen inneren Vorsprung (21) als Wider- lager für ein Federelement (13) an seinem ventilseitigen Ende aufweist.18. Pressure can according to one of the preceding claims, characterized in that the spring cage (11) has an inner projection (21) as an abutment for a spring element (13) at its valve-side end.
19. Druckdose nach Anspruch 13, dadurch gekennzeichnet, daß der Auslöser (12) an seinem tellerseitigen Ende einen peripheren Vorsprung (22) als Widerlager für das Federelement (13) aufweist.19. Pressure can according to claim 13, characterized in that the trigger (12) has at its plate end a peripheral projection (22) as an abutment for the spring element (13).
20. Druckdose nach einem der vorstehenden Ansprüche, dadurch ge- kennzeichnet, daß der Auslöser (12) an seinem tellerseitigen Ende einen Dichtsitz (23) in Form eines umlaufenden Vorsprungs aufweist.20. Pressure can according to one of the preceding claims, characterized in that the trigger (12) has a sealing seat (23) in the form of a circumferential projection at its plate-side end.
21. Druckdose nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Innenhülse (7) und die Membran (8) aus Aluminium gefertigt sind. 21. Pressure can according to one of the preceding claims, characterized in that the inner sleeve (7) and the membrane (8) are made of aluminum.
22. Druckdose nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Federkorb (11) wenigstens eine Durchbrechung (34) aufweist.22. Pressure can according to one of the preceding claims, characterized in that the spring cage (11) has at least one opening (34).
23. Druckdose nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die Membran (8) mit einem 2-Komponenten-Klebstoff mit der Innenhülse verklebt ist.23. Pressure can according to claim 2 or 3, characterized in that the membrane (8) is glued to the inner sleeve with a two-component adhesive.
24. Druckdose nach Anspruch 23, dadurch gekennzeichnet, daß der Klebstoff ein vernetzendes Epoxi/Amin-System oder Polyisocyanat/Härter- System ist.24. Pressure can according to claim 23, characterized in that the adhesive is a crosslinking epoxy / amine system or polyisocyanate / hardener system.
25. Verwendung der Druckdose nach einem der Ansprüche 1 bis 24 für flüssige 2-Komponentensysteme, insbesondere 2K-Dichtschäume, 2 K-Kleb- stoffe oder 2 K-Lacke. 25. Use of the pressure can according to one of claims 1 to 24 for liquid two-component systems, in particular two-component sealing foams, two-component adhesives or two-component lacquers.
EP03813585A 2002-12-19 2003-12-19 Pressurised dispenser for mixing and producing two-component materials Expired - Lifetime EP1578676B2 (en)

Applications Claiming Priority (3)

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DE10260117A DE10260117A1 (en) 2002-12-19 2002-12-19 Pressure can for mixing and dispensing two-component materials
DE10260117 2002-12-19
PCT/EP2003/014662 WO2004056660A2 (en) 2002-12-19 2003-12-19 Pressurised dispenser for mixing and producing two-component materials

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* Cited by examiner, † Cited by third party
Title
See references of WO2004056660A3 *

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DK1578676T4 (en) 2010-03-01
ATE361247T1 (en) 2007-05-15
CA2508873C (en) 2011-03-29
AU2003300539A8 (en) 2004-07-14
WO2004056660A2 (en) 2004-07-08
CA2508873A1 (en) 2004-07-08
EP1578676B2 (en) 2009-10-21
ES2286510T3 (en) 2007-12-01
WO2004056660A3 (en) 2004-09-10
ES2286510T5 (en) 2010-02-15
JP2006510552A (en) 2006-03-30
US20060201969A1 (en) 2006-09-14
DE50307203D1 (en) 2007-06-14
AU2003300539A1 (en) 2004-07-14
EP1578676B1 (en) 2007-05-02
DE10260117A1 (en) 2004-07-01
DK1578676T3 (en) 2007-09-10
US8403177B2 (en) 2013-03-26
JP4412605B2 (en) 2010-02-10

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