WO2012095178A1

WO2012095178A1 - Device for discharging a filling compound

Info

Publication number: WO2012095178A1
Application number: PCT/EP2011/050402
Authority: WO
Inventors: Florian Hüsler; Andreas Hiemer
Original assignee: Sulzer Mixpac Ag
Priority date: 2011-01-13
Filing date: 2011-01-13
Publication date: 2012-07-19

Abstract

The invention relates to a device for injecting a fluid filling compound, comprising a static mixer (1), wherein the static mixer has a housing (2) which includes a first cavity (47), wherein at least one mixing element (3) is arranged in the first cavity. The housing (2) has an outlet element (45). The outlet element (45) has a second cavity (48), wherein the second cavity (48) is connected to the first cavity (47) such that the fluid filling compound can be conducted from the first cavity (47) into the second cavity (48). A tubular element (60), which has a bulge, is held in the second cavity (48).

Description

Device for dispensing a filling compound

The invention relates to a device for dispensing a fluid

Filling compound. The device is attachable to a static mixer to precisely bring the filling compound, which has been mixed in the static mixer, to its destination.

A discharge arrangement consisting of a

Mehrkomponentenaustraggerat and a multi-component cartridge and a static mixer is known for example from EP0730913. A multi-component cartridge comprises at least one reservoir for components to be mixed, and is in particular as a

Cartridge discharge formed, which can be emptied by means of a dispensing device. Such a dispenser can be means for reducing the

Include filling volume of the reservoir. In particular, a

Dispensing device to be designed as a discharge. The static mixer according to this known solution also comprises a connecting piece which is intended to be assembled with the cartridge. The static mixer and the connecting piece are in this case designed as a single component, which can be produced by injection molding.

Furthermore, it is known to use attachments that are plugged onto the outlet end of the static mixer. Such an attachment is shown for example in WO2004 / 105856. They have the function to apply the filling compound more precisely at the place of use, for example a splice. Such attachments are also known to fill masses in

Deliberately introduce cavities. These essays are used, for example, for filling cavities in teeth that are characterized by a

Dental treatment have arisen. Such an article available on the market is shown, for example, in FIG. 10 or FIG. 11. A similar one Attachment is also known from US5413253, with the difference that the attachment in Aufsteckbereich surrounds the mixer tube.

The object of the invention is thus to provide a device which can bring in filling material in narrow, deep cavities. Another object of the invention is to provide an orientable device by means of which it is possible to introduce filling material into cavities which are difficult to access. Furthermore, it is an object of the invention to ensure that the orientable device to hold captive in a holder.

This object is achieved by means of a device for injecting a fluid filling compound. The device comprises a static mixer, wherein the static mixer comprises a housing which encloses a first cavity, wherein in the first cavity at least one mixing element is arranged. The housing has an outlet element, wherein the outlet element has a second cavity, wherein the second

Cavity is connected to the first cavity such that the fluid filling material is conductive from the first cavity into the second cavity. In the second cavity, a tubular member is held, which has a bulge. The tubular member has a first end and a second end. The first end is disposed in the second cavity and has a flange-extended portion. The flange-extended portion has a recess which is mounted on the outside of the flange-extended portion.

The tubular element and the static mixer are two

different components that are not coupled to each other, because the tubular element is to be mounted optionally in a subsequent step. If the tubular element were coupled to the static mixer, as shown for example in EP1825927 A, this requirement could not be fulfilled.

The mixing element is arranged in the first cavity. In this first cavity, the mixing of the individual components takes place. The Components leave the first cavity in the mixed state. The second cavity is disposed downstream of the first cavity.

The flared extended section has a preferred one

Embodiment an inner diameter dimension increasing substantially continuously from the first end of the tubular member to the second end thereof, the inner diameter dimension measured in a normal plane with respect to the longitudinal axis of the tubular member. The inner diameter dimension may also correspond to the distance from two opposite inner walls of the tubular element measured in a normal plane to the longitudinal axis of the tubular element. The tubular element may be a circular

Have cross-sectional area or a quadrangular cross-sectional area, or a polygonal cross-sectional area. The side lengths of the polygon of polygonal cross-sectional area may differ from each other. Through the bulge is the inner diameter dimension of

flange extended portion measured in a normal plane to the longitudinal axis of the tubular member in the region of the bulge greater than the inner diameter dimension measured in the same normal plane at a location at which there is no bulge. For example, if the cross-sectional area of the tubular member is circular and the bulge is at a location on the wall of the

is formed as a projection or nose, the inner diameter dimension is measured from the inner wall of the

Bulge to the opposite inner wall larger than the

Inner diameter dimension of the tubular element.

That is, the bulge is characterized by a local

Enlargement of the inner diameter dimension. This local

Enlargement of the inner diameter dimension is thus limited to a part of the circumference of the tubular member. The bulge occupies at most one third of the circumference of the tubular element, preferably at most a quarter of the circumference of the

tubular element. That is, the bulge extends over a sector of a maximum of 120 °, preferably a maximum of 90 ° of the circumference of the tubular element.

In particular, the continuous increase in the inner diameter dimension of the flange-extended portion may be limited to an area located in the vicinity of the first end of the

tubular element is located. The bulge is advantageously notched. Due to the

Bulge is required for the rotation of the tubular member in the housing a larger torque. The tubular element preferably has an outer diameter of at most 3, preferably at most 2.5, particularly preferably at most 1 .5 mm. This results in a maximum outer diameter of 3 mm, a maximum inner diameter of about 2.5 mm, for a maximum outer diameter of 2.5 mm, a maximum inner diameter of about 2 mm, for a maximum outer diameter of 1 .5 mm, a maximum inner diameter of about 1 mm. As the filling material with the length of the tubular element

has to overcome increasing pressure loss, the tubular element has a maximum length of 100 mm, preferably a maximum of 50 mm, more preferably a maximum of 30 mm.

The outlet element comprises a cone according to a preferred embodiment. Such a cone is provided to the

To reduce material consumption in the production of the outlet and to optimize the ejection element injection molding technology. In the direction of the mouth of the outlet thus decreases the wall thickness. A decreasing wall thickness is injection molding advantageous, because the Melt, which reaches the outlet last, requires a shorter cooling time, since less melt must be cooled, due to the decreasing wall thickness. Thus, the overall cooling time for the melt can be reduced by the configuration of the outlet element as a cone. The tubular element has a first end and a second end. The cone is arranged at the first end. When installed, the filling material enters the tubular element through the first end and out of the tubular element through the second end.

Also, the second cavity may be conical, so that the rohrformige element can be easily mounted and can be held in the cavity. In particular, at the first end, which is oriented towards the static mixer, the tubular element may have an extension which can be fitted into such a cone. When the smallest inner diameter of the cone is smaller than the outer diameter of the tubular member at the second end through which the filling material can exit, the tubular member is held in the cone by a press fit. The cavity may also have a plurality of sections conical sections, in which the rohrformige element is held at a plurality of support points. The tubular element may also have a plurality of protrusions.

The bulge may extend over at least part of the jacket of the cone.

The angle of inclination of the cone of the outlet member and the conical second cavity may differ. In particular, the angle of inclination of the outlet element may be greater than the angle of inclination of the conical second cavity.

A conically shaped second cavity is also advantageous for the

Flow of filling material. The filling material must be from the outlet end of the Mischers coming into the inlet cross-section of the tubular element to be promoted. If the cross section of the second cavity is reduced only gradually and continuously, the pressure loss of this flow can be kept low. This in turn means that the required

Contact pressure, which the dispensing device exerts on the cartridge, may be lower. The pressure loss is also by using a

Intermediate piece according to FIG. 1 or FIG. 2 additionally reduced, so that results by combining the intermediate piece and an outlet member having a second cavity which is conical, results in a particularly low pressure loss.

The second cavity can also have an inner diameter at least over part of its length which is smaller than the outer diameter of the tubular element. Also in this case results in a press fit. Another advantage of using a press fit is the tightness against the passage of filling material. The filling material therefore occurs only through the

Mouth opening of the tubular member, but not through a gap between the tubular member and outlet member, so that the entire filling material must pass through the tubular member to be applied to the desired location. The tubular element is advantageously bendable, so that the position of the mouth opening of the tubular element relative to the mixer can be changed. The property that the tubular element is bendable, on the one hand be justified by the fact that the material of the tubular element itself is bendable. Alternatively or in addition thereto, the tubular element may comprise at least one bending element. One

Bending element may for example comprise a plurality of thickenings. Between adjacent thickenings areas are arranged with a smaller wall thickness, which can be deformed more easily than the two extending from the thickened portions of the tubular element, which have a greater wall thickness, than the wall thickness between adjacent thickenings. The thickenings can

be formed for example as ribs or scales. A thickening is defined as a section in which the wall thickness is greater than in the two immediately adjacent sections. The wall thickness can be greater than or equal to the wall thickness of the tubular

Be essential, is that the wall thickness is locally between

adjacent thickening is smaller than the wall thickness of the tubular element in the direction of the inlet opening or the mouth opening

According to a further variant, the bending element is designed such that the bending element has a folded structure. The folded structure comprises, as seen in an axial section, a tine of a zig-zag profile, which forms the folded structure in this exemplary embodiment. This prong consists of a first side and a second side and an edge enclosed by the two sides. The edge should henceforth be referred to as mountain edge. In general, a plurality of these prongs are lined up, thus forming the folded structure. Adjacent teeth are connected by an edge which connects the right-side end of the left side arranged first point with the left side end of the right side arranged second point. This edge is to be referred to as Talkante in the episode. Thus follows in the area of

Biegeelements a first mountain edge on a first Talkante and a second Talkante then connects to the first Talkante. Between the first talc and the second talc, the first tine extends. The first spike is followed by a second spike, that of the second talant and a third spike

Talking is limited. Between the second talc and the third talc, the second mountain edge of the second peak rises. Along each of the edges of the shell of the tubular member is folded. The wall thickness of

Edges essentially corresponds to the wall thickness of the sides. If the bending element is already manufactured during the production of the tubular element, the wall thickness of the folded structure can be adjusted as desired. The wall thickness can in particular be selected such that in the folded state, the tubular element along a straight

Longitudinal axis extends and remains stable in the straight position. This kind of Production is particularly suitable for tubular elements which are produced by injection molding in a single step.

The folded structure may alternatively be subsequently applied after completion of the bending element by plastic deformation of the rohrformigen element. In this case, the tubular

Element can be prepared by extrusion or by a corresponding continuous manufacturing process for a semifinished product of a metallic material, which is then cut to the desired length and the folded structure can be applied subsequently by means of a forming process, which may include a stamping or pressing process. For tubular plastic elements, by contrast, alternatively, the folded structure can be applied immediately after the extrusion of the tubular element.

The folded structure causes the tubular element to have a straight longitudinal axis as long as no forces are applied to the tubular element by means of which a curvature can be generated. On the other hand bending forces are applied to the bending element, which are directed normal to the longitudinal axis or at least force components in the

Normal direction to the longitudinal axis, the straight longitudinal axis is curved in the region of the bending element. By the action of

Bending forces can plastically deform the bending element in the edges of the folds, so that the bending of the bending element is irreversible and the bending element remains in the curved position. Due to the circumferential folded structure, a kink stability is also ensured. This means that the inner cross-sectional area of the tubular element in the region of the bending element does not differ substantially from the inner cross-sectional area of the first and second sections which adjoin the bending element.

In addition to the previous embodiments of a bending element comprising a folded structure, it may also be provided that the folded structure is held under a bias. Especially if the angle subtended between two adjacent sides becomes small, that is, towards zero, a biasing force may be applied during the manufacture of the tubular element which holds the prongs in close-fitting relationship. That is, the distances between adjacent prongs are so small that the prongs support each other.

If a curvature is to be applied to the bending element, and this curvature of the bending element is to be maintained, as long as the discharge of the filling material takes place, then the biasing force is overcome by applying a tensile force to the bending element. By applying a tensile force, the angle, the adjacent sides to each other

include, enlarged. The adjacent sides can no longer support each other and can no longer obstruct a curvature. Then a force is applied to set the desired curvature. Due to this force, the material can deform locally plastically, at least in some of the edges, so that the material once applied

Curvature of the bending element is maintained. In particular, at least for the duration of the discharge of the filling compound, the curvature should not change, that is, the radius of curvature and the angle, the two enclose the bending element extending first and second portions of the tubular member to each other.

The tubular element further comprises a widening of the channel in the region of the inlet opening. This expansion serves to fix the tubular element in the outlet element. The tubular element is held firmly in the cavity and in particular can not be pushed out of the second cavity under the pressure of the filling compound. The inner diameter of the second cavity can be smaller than the outer diameter of the tubular element, at least in the region adjacent to the outlet opening, so that a press fit results. During assembly, the tubular element is inserted from the mixer side into the second cavity. Then the tubular element by means of an assembly tool under application of a compressive force, for example driven through one or a series of shocks through the second cavity until the rohrformige element projects to a large extent from the outlet opening. In this case, the expansion to

Centering of the assembly tool and serve to transmit the impact force.

Alternatively, the rohrformige element according to one of

previous embodiments also in the tool for the

Outlet element or the mixer housing are inserted. The rohrformige element is overmolded in this case, that is, during the

Injection molding surrounded by a plastic melt, the

is then cooled. According to this variant, the rohrformige element is thus used in a single step together with the production of the mixer housing. With this method can also

ensure that the cross-sectional area of the tubular element at the inlet opening is the same as the cross-sectional area of the second

Cavity at this point is.

The rohrformige element is placed according to a further variant without expansion in the tool for the mixer housing. The inlet opening of the rohrformigen element is detected by a tool mandrel which is movable. When the tool or the tool mandrel is moved in such a way that the shape of the mixer housing to be produced is obtained, this becomes

Tool or the tool mandrel inserted into the inlet opening of the rohrformigen element. During this movement of the tool mandrel or of the tool, the inlet opening of the tubular element is stretched, that is, the material of the tubular element is subjected to a plastic deformation. This variant has the advantage that a preceding or subsequent operation of the expansion can be omitted since the expansion already during the manufacture of the mixer housing and the

Exhaust element can be done. Alternatively, it is possible to attach and hold the rohrformige element according to one of the preceding embodiments by means of a snap connection or by means of an adhesive bond in the second cavity. Furthermore, the rohrformige element according to one of the preceding embodiments may be arranged rotatably relative to the static mixer.

According to a further preferred embodiment, the rohrformige element comprises a jacket made of metal. A metal tubular member is easy to manufacture and can be manually bent to any position. The user can thus easily adjust the position of the mouth opening of the tubular element to the desired order location of the filling material. Of course, one can

Be provided bending element according to one of the preceding embodiments.

The advantage of using a tubular element which is bendable or a bending element according to any one of the preceding

Embodiments is due to the fact that a once selected position of the tubular element is maintained. The deformation is thus a deformation in the plastic region and not a deformation in the elastic region, because in the latter a

Return to the original shape would be connected after elimination of the applied force for deformation.

The metal shell may be covered with a plastic layer. The use of a plastic layer is particularly advantageous in applications in which the filling material must be applied in a corrosive environment. The use of plastic is also advantageous in the dental field if the filling compound is, for example, a dental filling or an impression material for producing a tooth crown. Plastic is made of Patients feel more comfortable as it feels warmer and softer than a metallic surface.

Alternatively, the tubular member may comprise a plastic sheath. The tubular element may thus consist of a plastic, which is preferably bendable or contains a bending element according to one of the preceding variants.

To stabilize the tubular element, the tubular element may also comprise a core element which is within the rohrformigen

Elements is arranged. The core element may be formed, for example, as a metal pin or be formed a Drahtformig. In particular, the core element can be used to adjust the position of the mouth opening of the tubular element. The shell of the rohrformigen element can be made of any deformable material. The deformation of the material of the jacket may in this case be in the elastic range or in the plastic range. The tubular element must be capable of directing the filling material exiting the static mixer to the desired site of use. Determining the location of

Mouth opening, however, is taken over by the core element. The core element may extend freely inside the tubular element or it may be connected to the tubular element by means of a connecting element. Of course, several can

Connecting elements may be arranged at different locations in rohrformigen element.

Alternatively, the core element from the shell of rohrformigen

Elements are at least partially enclosed. In this case, it is avoided that the core element can generate an additional flow resistance in the tubular element. The flow path for the

Molding material is kept largely free.

The core element may be formed wire-shaped. In particular, the core element may contain a metal. Alternatively, the core member may be completely received in the wall of the shell of the tubular member. It is also possible to provide a plurality of core elements which form a reinforcing structure. The core elements may also be formed as a fiber, felt, fabric or knit, which is at least partially surrounded or enclosed by the material of the shell of the tubular element.

The static mixer may find particular use for mixing a thermosetting mix of flowable components.

Another possible use of the static mixer is the mixture of molding compounds in the dental field or the mixture of

Multi-component adhesives or the mixture of curing

Fillers in the construction sector, for example chemical dowels or

Anchorages.

The invention will be explained with reference to the drawings. 1 shows a section through a device for injecting a

fluid filling compound according to a first embodiment of the invention

2 shows a section through a device for injecting a

fluid filling compound according to a second embodiment of the invention

Fig. 3 is a section through a tubular element after a first

Embodiment of the invention.

Fig. 4 is a view of a tubular element after a second

Embodiment of the Invention FIG. 5 shows a section through the tubular element of FIG. 3 along the plane AA Fig. 6 is a section of a third embodiment of the tubular element according to the invention

Fig. 7 is a section of a fourth embodiment of the tubular

Elements according to the invention Fig. 8 is a section of a fifth embodiment of the tubular

Elements according to the invention

Fig. 9 is a section of a sixth embodiment of the tubular

Elements according to the invention

10 shows an attachment from the prior art FIG. 1 1 shows a section through the attachment of FIG. 10.

Fig. 12 is a view of a tubular element after a seventh

Embodiment of the invention

Fig. 13 shows a further variant for the production of a tubular

FIG. 14 is a view of the first end of the tubular element. FIG

Fig. 15 is a view of the tubular element

Fig. 1 shows a section through a static mixer 1 with a

Intermediate piece 4 and a tubular element according to a first embodiment of the invention. This static mixer 1 for a cartridge for accommodating one or in particular a plurality of components comprises a mixer housing 2, which at least one static

Mixing element 3 contains, in particular from a plurality of

Mixing elements can be constructed so that preferably a number of similar mixing elements forms a group of mixing elements. Such mixing elements are known for example from EP 749776 B or EP1426099 B1 or as shown in the illustration as a helical mixer with a hei ixförm structure. The mixer has the function of mixing the individual components well, so that a substantially homogeneous mixture is formed. The mixer could also be designed as a dynamic mixer (not shown). A dynamic mixer

differs from the static mixer by the mixing elements are arranged relatively movable to the mixer housing.

The mixer shown in Fig. 1 can be used to homogenize one component or for the mixture of two or more components in the same way. The components may be in a mixing ratio to each other, which deviates from a 1: 1 mixing ratio. The static mixer according to FIG. 1 is fastened to the cartridge by means of an annular coupling element 5. The coupling member 5 includes the inlet portion of the housing 2 of the static mixer and the

Intermediate piece 4, which contains a first channel 30 and a second channel 40, which each leads a component to the static mixer.

Of course, more than two channels may also be included in the intermediate piece 4 if more than two components are separated

should be supplied to each other from the static mixer 1. The

Coupling element 5 can be fastened to the cartridge, for example, by means of a bayonet fastening means 6, 7. According to an embodiment, not shown, the coupling element could also have a connecting element which engages in counter-element of the cartridge, for example, to form a latching connection. The static mixer 1 is thus by means of the coupling element 5 together with the intermediate piece 4 on the discharge cartridge or the discharge device fastened.

Alternatively, the coupling element 5 may have an external thread by means of which it can be screwed to the cartridge. The inlet portion of the housing 2 of the static mixer has an inlet end 10, which serves to receive the intermediate piece 4. The intermediate piece comprises a first connection element 24 and a second connection element 25, which are separated from one another by a retaining flange 9. The first connection element 24 is accommodated in the interior of the inlet region and can be held in the inlet end 10 by a retaining flange 14, which engages in a circumferential groove 15 of the inlet end 10. The first connection element 24 is thus intended to receive a housing of a static mixer. The adjoining the first connecting element 24 flange 9 serves as a support for the inlet end 10 of the housing of the static mixer. The first

Connecting element 24 and the second connection element 25 are cylindrical in this embodiment, could also have a square, diamond-shaped, rectangular, round, oval or another, matching the associated inlet end 10 cross-sectional area with the same operation. The first terminal member 24 may include a positioning member 29 for aligning the static mixer with respect to the

Have connection element. Also several, especially two

Positioning elements can be provided. This measure is advantageously used in mixers in which the quality of mixing in

Depending on the position of the mixing elements to the position of the

Intermediate piece changed. In particular, the positioning element 29 indicates the optimum position of the static mixer 1 with respect to the intermediate piece 4. For this purpose, the positioning element 29 may be configured as a projection, which also visibly shows the position of the static mixer 1 with respect to the intermediate piece 4 and thus also an aid to the

Assembly offers. The first connection element 24 comprises a

Lateral surface on which the projection is attached. The second

Connection element 25 closes on the opposite side of

Flange 9 and is intended for assembly with the cartridge.

According to a further variant, which is not shown here in the drawing, the first or the second outlet opening 32, 42 may be configured such that it is alignable in a suitable position to the static mixer.

In particular, the shape of the cross-sectional area of at least one of the first or second outlet openings 32, 42 is preferably not

rotationally symmetrical, in particular oval or rectangular or diamond-shaped. The first connection element 24, the flange 9, and the second

Terminal member 25 includes the first and second channels 30,40. The second connection element 25 may comprise a coding means. The intermediate piece 4 is in particular designed such that the first channel 30 has a first center axis 33 and the second channel 40 has a second center axis 43. The second connection element 25 comprises a first coding means 50 and optionally a second coding means. The first coding means 50 may be arranged, in particular with respect to a plane which is spanned by the first and second center axes 33, 43 of the channels 30, 40, opposite the second coding means. In particular, the first coding means 50 is designed as an arm, wherein the arm can also be referred to as a web. The arm has one

Finger element, which is intended for engagement in an associated recess of the dispensing device or the dispensing cartridge. The finger element may be formed as an axial strip, which is adapted for engagement in a

associated groove of the cartridge is determined.

The coding means 50 can also be designed as a groove in the outer jacket of the second connection element 25, which is not shown here in the drawing.

If two or more coding means 50 are provided, the coding means also need not be arranged opposite each other. If two or more coding means are provided, the

Cross-sectional area of at least one of the coding means of the

Cross-sectional area, of the other coding or different means, in particular when the coding means are arranged symmetrically to each other. Alternatively, a plurality of coding means 50 may also be one

have asymmetrical arrangement on the inlet side. Due to the asymmetrical arrangement, which in the same way on the

Discharge cartridge finds itself or the dispensing device, a unique positioning of the intermediate piece and thus the connectable with the intermediate static mixer to the discharge cartridge or the

Dispensing device done.

The cross-sectional area of the first inlet port 31 may differ from the cross-sectional area of the second inlet port 41. The element 16 has the function of an optical coding means in this embodiment. An example designed as an oval, polygonal, in particular square or diamond-shaped cross-sectional area element 16 is optically clearly visible, so that the static mixer 1 in

Assembly in a unique position to the element 16 can be aligned. The shape of the cross-sectional area of at least one of the first or second inlet openings 31, 41 is preferably not

rotationally symmetrical, in particular oval or polygonal, in particular rectangular or diamond-shaped.

The intermediate piece 4 is held over the retaining flange 14 in the housing 2 of the mixer. The flange 9 is adapted to the inlet end 10 of the housing 2 and is located on a shoulder 1 1 of the inner wall of the

Coupling 5 on. The intermediate piece 4 has an end face 20 on its outlet-side end plate. This end face 20 may be equipped with a guide element, which is designed in particular as a separating edge 17 and / or as a partial barrier 18, for deflecting the component flows, so that the components flow substantially perpendicular to the longitudinal axis 27 of the mixer and parallel to the end face 20 against a divider edge 8 have to. The divider edge 8 is the edge 4 of the first static mixing element 3 facing the intermediate piece 4, which comes into contact with the two components. The end face 20 contains the two outlet openings 31, 41 of the channels 30, 40. The separating edge 17 is attached to the end face 20 in such a way that each component which emerges through the two outlet openings 31, 41 is already divided into two partial streams by the separating edge 17. in particular two halves, is divided. The partial flows of each of the components combine in a collection chamber 23. Subsequently, the currents in the

Re-divided collection chamber by the divider edge 8 of the static mixer. Advantageously, the separating edge 17 and the divider edge 8 are normal to each other. This has the advantage that the component flow is subdivided into two partial flows which differ in their composition from the partial flows generated by the separating edge 17. This results in a first mixing stage even before the onset of

Components in the static mixing elements 3 of the static mixer. 1 In particular, if the mixing ratio of the components deviates from a 1: 1 mixing ratio, the division of each component into at least two partial streams and the subsequent union of each of the partial streams corresponds to a first mixing stage, because then it is ensured that the component which has the smaller volume fraction, to uniform parts enters the first mixing element 3 of the static mixer. Each of the partial streams thus contains a proportion of the first and the second component, which corresponds to the mixing ratio. By this first mixing stage thus the entry conditions are improved in the static mixer.

In addition to the separating edge 17, a partial barrier 18 and more

Baffles to divert the flow in the direction of the two subspaces of the divided by the divider edge 8 mixing space of the static mixer may be provided.

The separating edge 17 extends according to FIG. 1 from the end face 20 to a shoulder 22 of the housing 2 of the static mixer, which the

Enclosing space 23 encloses. The shoulder 22 connects the inlet area of the housing 2, which extends from the inlet end 10 to an inner surface 21, with the mixing space containing the static mixing elements 3. During assembly, the tubular element is inserted into the second cavity of the outlet element of the housing 2 in a first step. Then, the mixer elements 3 in the housing 2 of the static

Mischers 1 positioned. In a second step, the intermediate piece 4 is connected to the inlet region 26 of the housing 2, for example via the retaining flange 14, which is intended for engagement in the groove 15, which runs along the inner wall of the inlet region 26. For this purpose, the element 16 is optically aligned with the static mixer, so that the static mixer 1 and the intermediate piece 4 are assembled in exactly one matching position to each other. Then, the static mixer 1 and the intermediate piece 4 are inserted into the coupling element 5. The intermediate piece 4 is provided with a flange 9 which engages in a groove 13 which is located on the inside of the wall 12. The

Coupling element 5 is then connected via the bayonet fastening means 6, 7 with the discharge device or the discharge cartridge. These

Connection only comes about when the coding means 50 engages in a receiving means of the dispenser or the discharge cartridge. In this condition, the system is ready to mix the components.

Fig. 2 shows a section through a static mixer according to a second embodiment of the invention, which is assembled with a cartridge into a unit. The intermediate piece 4 is from the first

Connection element 24, the flange 9 and the second connection element 25 constructed. Several channels 30,40 run through the first

Connection element 24, the flange 9 and the second connection element 25. Through the channels 30, 40 are mixed components of a dispenser or a discharge cartridge to a static mixer 1 passed, in which the two components meet and mixed. There are a variety of different dispensers or Austragkartuschen, which serve the storage and transport of the individual components. Furthermore, different types of static mixers are used depending on the desired mixing ratio and required throughput. These static mixers can get through differentiate their internals, whereby the flow velocity and the flow guide changes, they can be different

Have outer diameter, so that different flow rates are processable, thus one for the type of static mixer

characteristic throughput can be achieved.

The user is thus depending on the needs of a variety of

Combinations available. But in order to combine any dispensing or dispensing cartridges with any mixers, the spacer 4 is used. The channels 30, 40 of the intermediate piece 4 have inlet openings 31, 41, which in a discharge of a

Discharge device or Austragkartusche intervene or in which

Discharge means can intervene. The second connection element 25 may also be constructed from two pipe sections which protrude from the inlet side of the flange 9. These pieces of pipe kartu see during assembly with a dispenser or a discharge from corresponding outlet openings of the discharge, so in this

Outlet openings of the dispenser or the discharge kartu see plugged, they therefore represent an embodiment of a plug-in. So that the intermediate piece 4 is in the correct position to the dispenser or the dispensing cartridge, a coding means 50 may be provided.

2 shows a section through a device for injecting a fluid filling compound according to a second embodiment of the invention. The device is part of a device comprising a static mixer 1, an intermediate piece 4 and a cartridge 51. The static mixer 4 is connected via the intermediate piece 4 with a cartridge 51. These

Cartridge includes a first storage chamber 52 and a second

Storage chamber 53. The filling volume of the first storage chamber 52

differs from the filling volume of the second storage chamber 53. This device is used to two components in

Mixing different mixing ratios, the

Mixing ratio in particular 4: 1 or 10: 1 may be. An unillustrated dispensing device may be used to convey the filling material in the first and second storage chambers via the intermediate piece 4 into the static mixer. For this purpose, the intermediate piece has a first channel 30 and a second channel 40. In this exemplary embodiment, the inlet opening 31 of the first channel 30 and the inlet opening 41 of the second channel 40 are arranged on tubular connecting pieces, which engage in corresponding first and second outlet channels 54, 55 for the components of the filling compound. The first outlet channel 54 is arranged after the first storage chamber 52 and the second outlet channel 55 is arranged after the second storage chamber 53.

The emerging from the static mixer 1 filling material passes into the outlet member 45. Also in this embodiment, the

Outlet 45 designed as a cone 46. The cone 46 includes a second cavity 48 adapted to receive and deliver the filling material exiting the first cavity 47. The cavity 47 is formed by the interior of the mixer housing 2 and contains at least one static mixing element 3rd

In the second cavity 48, a tubular member 60 is arranged, which serves for the application of the filling material to the destination. The tubular member 60 will be described in more detail below.

Fig. 3 shows a section through a tubular element according to a first embodiment of the invention. The tubular member 60 is in the

Outlet 45 was added. The outlet member 45 is disposed adjacent to the mixer housing 2 and may be integral with the

Be mixer housing 2. The mixer housing 2 contains a first

Cavity 47, which serves as a closed channel for the filling material. The first cavity 47 merges into the second cavity 48, which is the tubular one Contains element 60. The tubular element 60 is partially received in the second cavity 48 and projects beyond the outlet opening 70 of the

Outlet 45 addition. The tubular member 60 includes a closed channel 56 which leads from the first or second cavity 47, 48 to the mouth opening 61 of the channel 56 for delivery of the filling material.

The tubular element 60 is bendable and is in Fig. 3 with a

Curvature shown. Thereby, the position of the orifice 61 of the tubular member 60 relative to the static mixer 1 can be changed. The property that the tubular element 60 is bendable, on the one hand be justified by the fact that the material of the tubular member 60 is bendable.

The tubular element 60 further comprises a widening of the channel 56 in the region of the inlet opening 65. This expansion serves the

Recording an assembly tool. In the expansion can a

Mounting tool to engage the tubular member in the second

To position and hold the cavity. By means of the mounting tool, a shock can be exerted on the tubular element, whereby the tubular element 60 is held firmly in the cavity 48. Of the

Inner diameter of the second cavity 48 is smaller than the outer diameter of the tubular element 60 at least in the region adjacent to the outlet opening 70.

During assembly, the tubular element 60 is inserted from the mixer side into the second cavity 48. Then, the tubular member is driven by means of a mounting tool by applying a compressive force, for example by one or a series of shocks through the second cavity 48 until the tubular member protrudes to a large extent from the outlet opening 70. The expansion 57 serves to center the assembly tool and to transmit the impact force.

Fig. 4 shows a view of a tubular member 60 according to a second embodiment of the invention, which alternatively or in addition to the In Fig. 3 shown tubular element 60 comprises at least one bending element 62. A bending element 62 may, for example, a plurality of

Thickenings 63 include. Between adjacent thickenings 63 areas of lesser wall thickness, such as constrictions 64 are arranged, which can be deformed easier than the two of the thickenings extending first and second ends 71, 72 of the

tubular element 60. These first and second ends 71, 72 have a greater wall thickness, as the constrictions 64. Of course, a single constriction 64 may be provided. The constriction may also include an area of reduced wall thickness extending between the first end 71 and the second end 72. The thickenings 63 may, for example, as ribs or scales

be educated. The thickenings can also have a wave-shaped profile. A thickening is defined as a section in which the wall thickness is greater than in the two immediately adjoining sections. The wall thickness may be greater than or equal to the wall thickness of the tubular element 60 in the region of the first or second end 71, 72. It is essential that the wall thickness locally between adjacent thickenings is smaller than the wall thickness of the tubular element from that closest to the first end 71

Constriction 74 to the inlet opening 65 or from the second end 72 nearest constriction 73 to the mouth opening 61st The choice of the number and the profile of the constrictions is preferred

to design that results in a curvature of the tubular member 60, which takes place along a curve whose radius is constant or continuously variable. It is advantageous if the rohrformige

Element no kink or possibly a plurality of small kinks, so that the flow of the fluid in the curvature region is deflected as little as possible abruptly. Also according to this embodiment, the rohrformige element 60 has a widening 58. The expansion in this case includes not only the Channel 56, which is not visible in this illustration, but also the jacket 66 of the tubular member 60th

The widening 58 may already be attached to the tubular element according to the embodiment of Fig. 4 or according to Fig. 12, before it is installed in the outlet member 45, but it may also arise as a result of the engagement of the mounting tool.

An expansion according to the embodiment of FIG. 4 and FIG. 12 has the further advantage that the filling material in the region of

Inlet 65 less backwater. The transition from the second cavity 48 having a diameter which substantially corresponds to the diameter of the static mixer to the channel 56, the diameter of which is a maximum of about one millimeter, is thus gradual, since the

Widening 57 to a narrowing of the passage cross-section for the

Filling material leads. The reduction of the passage cross section for the

Filling material, seen in the flow direction leads to low pressure loss and consequently to a reduction of the pressure gradient from the reservoirs of the cartridge to the mouth opening 61 of the tubular element.

Fig. 5 shows a section through the rohrformige element 60 of FIG. 3 along the plane A-A. It shows the shell 66 of the tubular element and the channel 56 for the filling material, which in the longitudinal direction through the rohrformige

Element 60 runs. According to a preferred embodiment, the rohrformige element 60 comprises a jacket 66 made of metal. A tubular element 60 made of metal is easy to manufacture and can be bent manually in any position, is thus bendable. The user can thus easily the position of the mouth opening 61 of

match tubular member 60 to the desired location of the filling material.

Fig. 6 shows a section according to a third embodiment of the tubular member 60 according to the invention. The coat 66 of metal or a bendable plastic may be coated with a plastic layer 67.

The rohrformige element 60 may also consist of a plastic containing a bending element 62 according to one of the preceding variants. Fig. 7 shows a section illustrating a fourth embodiment of the tubular element 60, wherein for stabilization of the tubular element 60, a core element 68 may be provided which within the

tubular element 60 is arranged. The core element 68 may be formed, for example, as a metal pin or be formed wire-shaped. The core member is used to adjust the position of the mouth 61 of the tubular member 60.

The jacket 66 of the tubular element 60 may be made of any deformable material. The deformation of the material of the jacket 66 may in this case be in the elastic range or in the plastic range. The tubular element 60 must be able to pass the filling material exiting the first cavity 47 of the static mixer 1 into the second cavity 48 and from there into the channel 56 of the tubular element 60 to guide it to the desired site of use. The determination of the position of the mouth opening 61 is made by the core member 68. According to FIG. 7, the core element 68 extends freely in the interior of the tubular element 60, ie it is arranged in the channel 56. If the rohrformige element bent, this has the consequence that the core member 68 is also bent. The core element is plastically deformed during the bending process. The jacket 66 of the tubular element can also be plastically deformed, but can also be elastically deformed. However, the bend is made by the plastically deformed

Main element 68 maintained. The elastic return forces acting on the shell 66 of the tubular element are insufficient to reverse the plastic deformation of the core element 68. Therefore, the rohrformige element remains capable of, by the bending process has been specified unless another bending process is initiated.

Fig. 8 shows a section showing a fifth embodiment of the tubular member 60 which, unlike Fig. 7 by means of a

Connecting element 69 is connected to the core element 68.

Of course, a plurality of connecting elements 69 may be arranged at different locations in the tubular element 60. The connecting element 69 is thus directly in the channel 56 of the flow of the filling compound. By a suitable arrangement of the connecting element 69 or a plurality of connecting elements, an additional mixing of the filling compound can take place.

9 shows a section of a sixth embodiment of a tubular element 60 according to the invention which, as an alternative to the embodiments shown in FIG. 7 or 8, shows a core element 68 which is at least partially enclosed by the skirt 66 of the tubular element 60. In the present illustration, the jacket 66 completely surrounds the core element 68. This variant has the particular advantage that in selecting the material of the core element 68 it is not necessary to take account of whether the material of the core element 68 is compatible with the filling compound, since the core element 68 is not in contact with the filling compound. In this case, if possible, the core element 68 can generate an additional flow resistance in the tubular element 60. The flow path for the filling material through the channel 56 is kept largely free according to this embodiment. The core member 68 may be in the illustrated in Fig. 6,7,8

Embodiments each be formed wire-shaped. In particular, the core element 68 may include a metal. The core member 68 may also be encased in a material or coated with a material which is well compatible with the filler or has other application specific advantages, such as good haptic or optical Properties or better compatibility, especially when used in the dental field.

The core member 68 may alternatively be completely received in the wall of the shell of the tubular member, which is not shown in the drawing. It is also possible to provide a plurality of core elements which form a reinforcing structure. The core elements may be individually inserted in the shell or interconnected. The

Core elements may also be formed as a lattice-shaped structure, as a fiber, felt, fabric or knit, which is at least partially surrounded or enclosed by the material of the shell of the tubular element.

Fig. 10 shows a static mixer 101 mounted on a cartridge 108 and a prior art attachment. The

Cartridge 108 includes a first reservoir 1 1 1 and a second reservoir 1 12. The first reservoir 1 1 1 includes a first

Component of a fluid filling compound and the second reservoir 1 12 contains a second component of the fluid filling compound. The first component is conveyed through the first channel 109 in the mixer housing 102, the second component is conveyed through the second channel 1 10 in the mixer housing. The first channel 109 and the second channel 1 10 are guided in tubular socket 1 16, 1 17, which are part of the cartridge 108.

On the tubular nozzle, an inlet member 1 18 is attached, which is integrally formed with the mixer housing 102. The

Inlet member 1 18 has two projections 106, 107 which engage a fastener 19 to hold the static mixer in firm connection with the cartridge 108.

After exiting the channels 109 and 110, the two components combine to form a single stream which forms the fluid filling compound. This filling material is promoted by attaching a contact pressure on the reservoir 1 1 1 and 1 12 through the channels 109 and 1 10 and inside the mixer housing by the static mixing elements 103rd The attachment 1 13 is plugged in the present illustration on the outlet end of the static mixer and therefore has a diameter which is adapted to the outlet opening 1 14 of the static mixer 101, which is shown in section in Fig. 1 1.

Fig. 1 1 shows a section through the attachment 1 13 of Fig. 10. The attachment 1 13 is a conical plastic tube, which is about 20 mm long. At the tip of the cone, its outer diameter is about 3 mm and its inner diameter is about 1 .5 mm. The outside diameter at the

Coupling point to the outlet opening 1 14 of the static mixer corresponds at least to the inner diameter of the outlet opening 1 14. In Fig. 10, further, an annular stop 1 15 is shown, whose diameter corresponds to the outer diameter of the outlet opening 14 1.

Fig. 12 shows a section through a tubular element according to a seventh embodiment of the invention. The tubular member 60 is received in the outlet member 45. The outlet member 45 is in

Connected to the mixer housing 2 and formed integrally with the mixer housing 2. The mixer housing 2 contains a first cavity 47, which serves as a closed channel for the filling compound. The first cavity 47 merges into the second cavity 48 containing the tubular member 60. The tubular element 60 is partially received in the second cavity 48 and projects beyond the outlet opening 70 of the

The tubular element 60 is bendable and is shown in FIG

Curvature shown. Thereby, the position of the orifice 61 of the tubular member 60 relative to the static mixer 1 can be changed. In particular, the tubular member 60 includes a flexure 62 which is formed such that the flexure has a pleated structure 75 has. The folded structure 75 comprises, viewed in an axial section, a tine 76 of a zig-zag profile, which is in this

Embodiment forms the folded structure. This prong 76 consists of a first side 77 and a second side 78 and an edge 79 which is enclosed by the two sides 77, 78. The edge 79 should henceforth be referred to as a mountain edge. In general, a plurality of these prongs 76 are strung together and thus form the folded structure 75. Adjacent prongs 76, 86 are connected by an edge 80 which the right-hand end 81 of the left-hand side first prong 76 with the left-side end 82 of the right side arranged second spike 86 connects. The terms on the left and on the right here refer to the illustration in FIG. 12, but are only intended to illustrate and in no way be interpreted as being limited to the position in the drawing in any way. This edge 80 will be referred to in the text as Talkante. Thus, in the region of the bending element, a first rock edge 79 follows a first talker 80 and a second talker 83 then joins the first talker 80. Between the first talc 80 and the second talc 83, the first tine 76 extends. The first tine 76 is followed by a second tine 86 bounded by the second talc 83 and a third talc 85. Between the second talcant 83 and the third talc 85, the second mountain edge 84 of the second tine 86 rises. Along each of the edges 79, 80, 83, 84, 85, the shell of the tubular element 60 is bent. The wall thickness of the edges 79, 80, 83, 84, 85 corresponds essentially to the

Wall thickness of pages 77, 78. Is the bending element during the

Production of the tubular element already made, the

Wall thickness of the folded structure can be set arbitrarily. The

Wall thickness can in particular be chosen such that in the folded state, the tubular element extends along a straight longitudinal axis and remains stable in the straight position. This type of production is particularly suitable for tubular elements, which in

Injection molding can be produced in a single step. The folded structure 75 may alternatively be applied subsequently after completion of the bending element 62 by plastic deformation of the tubular element 60. In this case, the tubular element will be made by extrusion or by a corresponding continuous manufacturing process for a semifinished product of a metallic material, which is subsequently cut to the desired length and the folded structure can subsequently be applied by means of a forming process, which embossing - or pressing method may include. For tubular plastic elements, by contrast, alternatively, the folded structure may be applied immediately after the extrusion of the tubular element 60.

The folded structure 75 causes the tubular member 60 to have a straight longitudinal axis 87 as long as no forces are applied to the tubular member by means of which a bend is created. However, if bending forces are applied to the bending element, which are directed normal to the longitudinal axis or at least have force components in the normal direction to the longitudinal axis, the straight longitudinal axis is curved in the region of the bending element. By the action of

Bending forces can plastically deform the bending element in the edges of the folds, so that the bending of the bending element is irreversible and the bending element remains in the curved position. Due to the circumferential folded structure, a kink stability is also ensured. That is, the inner cross-sectional area of the tubular member 60 in the region of the flexure 62 does not differ significantly from the inner cross-sectional area of the first and second portions 88, 89 that contact the inner surface

Connect bending element.

In addition to the previous embodiments of a bending element 62 comprising a folded structure 75, it may also be provided that the folded structure is held under a bias.

In particular, when the included between two adjacent sides 77, 78 angle is small, ie goes to zero, a

Biasing force during the manufacture of the tubular element are applied, which keeps the serrations 76, 86 in a close-fitting position to each other. That is, the distances between adjacent prongs are so small that the prongs support each other. This is shown in FIG. 12 for the two prongs which are directly adjacent to the first one

Join section 88.

If a curvature is to be applied to the bending element, and this curvature of the bending element is to be maintained, as long as the discharge of the filling material takes place, then the biasing force is overcome by applying a tensile force. By applying a tensile force, the angle, the adjacent sides 77, 78 include each other, increased. The adjacent sides can no longer support each other and can no longer obstruct a curvature. Then a force is applied to set the desired curvature. As a result of this force, the material can locally deform plastically at least in some of the edges 79, 80, 83, 84, 85, so that the curvature of the bending element once applied is maintained. In particular, the curvature should not change, at least for the duration of the discharge of the filling compound, that is, the radius of curvature and the angle that the two extending from the bending element first and second portions 88, 89 of the tubular

Enclose elements to each other.

The tubular element 60 further has a widening 57 of the channel 56 in the region of the inlet opening 65. This expansion 57 serves to fix the tubular element 60 in the outlet element 45. The tubular element 60 is held firmly in the cavity 48 and, in particular under the pressure of the filling compound, can not be separated from the second

Cavity 48 are ejected. The inner diameter of the second cavity 48 may be smaller than the outer diameter of the tubular element 60, at least in the region adjacent to the outlet opening 70, so that a press fit results. During assembly, the tubular element 60 is inserted from the mixer side into the second cavity 48. Then the tubular Element driven by means of an assembly tool under application of a compressive force, for example by one or a series of shocks through the second cavity 48 until the tubular member projects to a large extent from the outlet opening 70. In this case, the widening 57 can serve for centering the assembly tool and for transmitting the impact force.

Alternatively, the tubular member 60 according to any of

previous embodiments also in the tool for the

Outlet 45 and the mixer housing 2 are inserted. The tubular element 60 is encapsulated in this case, that is, surrounded during the injection molding of a plastic melt, which is then cooled. According to this variant, the tubular element 60 is thus in a single step together with the

Manufacture of the mixer housing used. It can also be ensured with this method that the cross-sectional area of the tubular element 60 at the inlet opening is the same as the cross-sectional area of the second cavity 48 at this point.

Another variant is shown in FIG. The tubular element 60 is placed without widening 57 in the tool 90 for the mixer housing 2, which is shown in Fig. 13. The inlet opening 65 of the rohrformigen

Element 60 is engaged by a tool mandrel 91, which is movable. When the tool 90 or the tool mandrel 91 is moved so as to obtain the mold of the mixer housing to be manufactured, the tool mandrel enters the inlet opening 65 of the tubular element

introduced. During this movement of the tool mandrel or the

Tool is stretched the inlet opening of the rohrformigen element, so subjected to the material of the tubular element of a plastic deformation. This variant has the advantage that a preceding or subsequent operation of the expansion can be omitted since the expansion already during the manufacture of the mixer housing and the

Exhaust element can be done. Alternatively, it is possible, the tubular element 60 according to one of the preceding embodiments by means of a snap connection, a holding connection or by means of an adhesive bond in the second

Cavity to fasten and hold. Furthermore, the rohrformige element 60 according to one of

previous embodiments to be rotatable relative to the static mixer, unless it would be attached with an adhesive connection.

Fig. 14 shows a view of the first end of the tubular element 60 according to a preferred embodiment of the invention. The rohrformige element 60, which be configured according to each of the preceding embodiments, has a bulge 92. The bulge 92 is advantageously designed notched. The bulge 92 extends at least from the first end of the tubular element along at least a portion of the expansion. The widening can be configured in particular as a conical widening, as has already been described in connection with the previous embodiments.

Fig. 15 shows a view of the tubular element 60, which is the

Bulge 92, which is arranged at the first end 71 of the tubular element. The first end 71 of the tubular element 60 serves in the operating state as an inlet opening for the filling compound. The second end 72 of the tubular element 60 serves as an outlet opening for the filling material. Of course, may be provided between the first and second ends of the rohrformigen element, a bending element to a

Make curvature of the tubular element. In the simplest embodiment, the rohrformige element itself is designed as a bending element. Further examples of alternative embodiments for such bending elements can be found in FIG. 3, FIG. 4, FIG

List is not to be regarded as exhaustive, but should include all equivalent embodiments.

Claims

A device for injecting a fluid filling compound comprising a static mixer (1), the static mixer comprising a housing (2) enclosing a first cavity (47), wherein in the first cavity at least one mixing element (3) for mixing the fluid filling material wherein the housing (2) comprises an outlet member (45), the outlet member (45) having a second cavity (48), the second cavity (48) being connected to the first cavity (47) such that fluid filling compound from the first cavity (47) in the second cavity (48) is conductive, and in the second cavity (48) a tubular member (60) is held, which has a first end (71) and a second end (72) wherein the first end (71) is disposed in the second cavity (48) and has a flared extended portion, characterized in that the flared extended portion has a protrusion (92) formed on the A outside of the

flange extended section is attached.

The apparatus of claim 1, wherein the flange-extended portion has an inside diameter dimension that extends from the first end of the tubular member to the second end in FIG

increases substantially continuously, wherein the inner diameter is measured in a normal plane with respect to the longitudinal axis of the tubular member and / or the distance of two

opposite inner walls each measured in one

Normal plane corresponds to the longitudinal axis of the tubular element.

3. Device according to one of claims 1 or 2, wherein by the

Bump the inner diameter dimension of the flange extended portion measured in a normal plane to Longitudinal axis of the tubular member in the region of the bulge is greater than the inner diameter dimension measured in the same normal plane at a location at which no

Bulge is located.

Device according to one of the preceding claims, wherein the rohrformige element (60) has an outer diameter of at most 3 mm, preferably at most 2.5 mm, more preferably at most 1 .5 mm.

Device according to one of the preceding claims, wherein the rohrformige element (60) has a maximum length of 100 mm, preferably of at most 50 mm, more preferably of at most 30 mm.

Device according to one of the preceding claims, wherein the first end (71) in the second cavity (48) is arranged, wherein the second cavity (48) is at least partially conical.

Device according to one of the preceding claims, wherein the rohrformige element (60) is bendable and / or with respect to the static mixer (1) rotatable and / or at least one bending element (62).

Apparatus according to any one of the preceding claims, wherein the tubular member (60) comprises a metal sheath (66).

The device of claim 8, wherein the metal sheath (66) is coated with a plastic layer (67).

Device according to one of the preceding claims 1 to 8, wherein the rohrformige element (60) comprises a sheath (66) made of plastic.

1 1. The apparatus of any one of the preceding claims, wherein the tubular member (60) comprises a core member (68) disposed within the tubular member (60).

12. The apparatus of claim 12, wherein the core member (68) by means of a connecting element (69) with the rohrformigen element (60) is connected.

13. The apparatus of claim 12 or 13, wherein the core element (68) from the jacket (66) of the rohrformigen element (60) is at least partially enclosed. 14. Device according to one of claims 12 to 14, wherein the

Core element (68) is formed wire-shaped and / or contains a metal.

15. Device according to one of the preceding claims, wherein the tubular element has a circular cross-sectional area, a quadrangular cross-sectional area, or a polygonal

Has cross-sectional area.