DE2440909A1 - AEROSOL SPRAY HEAD - Google Patents

Description

Edward Howard Green, 11 Army Trail Road, Addison , Illinois 60101 (United States of America)

Aerosol spray head

The invention relates to an aerosol spray head with a central bore and an essentially horizontally extending cylindrical channel connecting the central bore to the outer surface of the spray head.

If you release or spray prepackaged materials such as paints and varnishes onto surfaces with one print, then you want this material to be sprayed on as evenly as possible. The conventional spray heads used up to now emitted a round spray fan, and if, for example, a vertical movement was used when spraying, then a larger proportion of the volume of the released material always came approximately in the middle of the sprayed pattern or fan.

In the past few years, many materials have been packaged as a suspension or in dissolved form in aerosol canisters, bottles and bombs and, if desired, through valves

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and spray heads have been dispensed. There are many different valve designs that go along with a spray head usually designed as a push button were mounted on such pressure vessels. By Pressing or tilting the spray head opens the valve and the pressurized material is released sprayed through the mouth of the spray head.

There are already paints or other coating materials dispensed from aerosol containers. Attempts have also been made to use these materials in the form of a special pattern or spray fan, which effectively replace a brushstroke should; however, the result was always an accumulation of the sprayed material around or in the vicinity of the spray head mouth, and droplets formed and dripped off the spray head.

The invention is based on the object of designing or improving an aerosol spray head so that it has a with a brushstroke gives off a spray fan, made of conventional plastic in conventional Forming or casting technology can be produced by simply exchanging the desired spray fan dimensions and a desired density of the sprayed material can be set, a combination with various standard spray heads allowed, by means of existing automatic manufacturing devices for known spray heads completely Can be put together, and finally can be used without dropping a brushstroke effectively replace. .

According to the invention this object is achieved in that in the cylindrical channel of the spray head a smaller one

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Inner portion of an insert is fitted with a tight sealing fit; that the stake is also an enlarged one Outer section with a central mouth and a connection channel has, which is integral with one of the the outer section connected smaller inner section penetrating centrally arranged connection channel in Connected; and that on the outside of the enlarged outer section a continuous up to the edge thereof and there is arranged an open groove which intersects the central mouth and the connecting channel.

The spray head equipped with the insert according to the invention is able to effectively replace a brushstroke while avoiding the formation of drops. The insert can be made of suitable plastic in various designs, with mouth openings of different widths, with different opening angles of the V-shaped groove, for example, and with different groove depths , so that brushstroke-like spray fans can be produced in any desired size and with any desired spray material -Let density be realized.

A V-shaped groove creates a spray fan that is much larger in height than its width when sprayed a short distance on a surface. The height of the spray fan runs in the axis of the V-shaped groove. The width or the narrow dimension of the spray fan extends perpendicular to the longitudinal axis of the V-shaped groove.

The height of the spray fan is primarily determined by the diameter of the central mouth and the inner dimensions .

The width or thickness of the spray fan is primarily determined by

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determines the angle of the V-shaped groove.

The mouth of the V-shaped groove is preferably the same size as the diameter of the central mouth.

Preferably the larger ends of the V-shaped groove are open; this advantageously eliminates the accumulation of sprayed material and the casual dripping of this material.

First, the invention is briefly summarized. The inventive Spray head insert consists of an inner section of smaller diameter and substantially cylindrical Shape and a substantially circular outer portion integrally connected therewith, on the outer or front surface has a central mouth and a V-groove intersecting the mouth and extending to the edges of this surface and at the Ends is open. The outer section of the insert can be circular, oval, rectangular or square be.

The spray head has a central bore along its central axis and one substantially at right angles to it outgoing and to the outside reaching cylindrical channel into which the inner section of the insert with narrow Sealing seat is fitted. In the sealingly fitted state, a product filled in under pressure can pass through the spray mouth can be sprayed.

The molds used to manufacture the insert according to the invention are standard designs and are designed in such a way that that they can be built into conventional die-casting machines for processing plastic.

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The molded plastic insert has a circular spray mouth cut by a V-groove. The angle of the V-groove can be from 30 to 160, preferably from 60 to 120, and more preferably about 90. The diameter of the spray mouth can be equal to or smaller than the opening width or the height of the V-groove. Of the The diameter of the mouth is preferably equal to the height of the V-groove, and its diameter can be from 0.25 mm to 1.25 mm. The length of the estuary can be from 1/4 to four times the value of the mouth diameter, preferably the length of the mouth channel is equal to the diameter of the mouth.

The depth of the V-groove can be equal to or smaller than the diameter of the spray mouth. Preferably, however the depth of the V-groove is about half the diameter of the mouth.

The spray head insert according to the invention is particularly suitable good for spraying paints, enamels, varnishes, insecticides and bacterial coatings.

Depending on the material to be sprayed , the diameter of the spray mouth, the angle of the V-groove, the depth of the V-groove and the internal dimensions are chosen so that a spray pattern or a spray fan from 5 to 15 cm high and 0.6 to A width of 2.5 cm is created when spraying against a surface 10 to 20 cm away.

A preferred embodiment of the invention is explained in more detail below with reference to a drawing. Show in it:

1 shows a detail from the front view of a pressure vessel with a spray head according to the invention with this insert j

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Pig. 2 shows a section through a line A-A of Fig.l on an enlarged scale, showing a Valve arrangement in which the spray head, valve tappet and valve piston are separate components are trained;

3 shows a similar section through a spray head, on which an integral valve tappet which can be separated from the valve piston is formed;

FIG. _T 4 is an enlarged plan view of the nozzle insert of FIG. 1;

FIGS. 5 and 6 each show a section along a line B-B and C-C of FIG. 4; and

FIG. 7 shows a perspective overall illustration of the nozzle insert from FIG.

In the figures of the drawing, the same or similar details are denoted by the same reference symbols.

The spray head 1 shown in Figures 1, 2 and 3 of the drawing is attached to the upper end of a valve assembly 2 and is located on a pressure vessel 3. In this form the assembly is usually sold to manufacturers of overpressure packaged products. However, the spray head can be sold with or without a valve. A cover element 4 stamped and formed from sheet metal with a central dome 5 in which a central opening is located serves as the upper termination for the pressure vessel (not shown). A ring seal 7 made of rubber, the central opening 8 of which is aligned with the central opening 6, is clamped in the interior of the central dome 5. A valve piston 9 belonging to the valve arrangement 2 is normally biased upward within a valve housing 11 by means of a helical spring 10. A splash 12 at the upper end of the valve housing 11 is fixed by means of a constriction 13 in the central dome 5 and is pressed against the ring seal 7 from below. The inside of the valve

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housing 11 upwardly and downwardly displaceable valve piston 9 is at its upper end to a valve seat 19 formed, which forms a valve seal with the ring seal 7 in the vicinity of the central opening 8.

A hollow valve tappet 14 is sealed and slidably passed through the central opening 8 of the ring seal 7 and inserted with its lower end into a cylindrical extension 15 of the valve piston 9. To clean the plunger, the spray head 1 with the valve plunger extending therefrom can be removed from the valve arrangement remove. A slot 16 protruding through the outer wall of the valve tappet extends upward a little into the ring seal 7 into it and is closed by this when the valve is closed. The bottom of the hollow valve lifter engages around a centering lug 17 on the bottom of the recess of the cylindrical valve piston attachment 15.

When the user of the valve assembly presses on the top of the spray head, then leaves the valve seat 19 the underside of the ring seal 7, and that in the Product which is located in the pressure vessel 3 and filled with excess pressure can pass through a sink tube 20 into an inner chamber 21 of the valve housing 11 arrive. The product then flows around the outside of the valve piston 9, passes the valve seat 19 into the slot 16 and flows from there further upwards through a central bore in the valve tappet 14 in the spray head 1 in order to be dispensed or sprayed through a spray orifice 22.

In the body 25 of the spray head 1 there is a vertical cylindrical recess 26; Recesses 27 in the body 2 5 of the spray head are used to reduce the weight and amount of material for the spray head. The continuation of the central hole 18 in the valve key 14 forms an essentially

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union horizontally extending cylindrical connecting channel 28, which is dimensioned so that it has a cylindrical molded inner portion - 29 of a nozzle insert 24 with a tight, tight sliding fit. Through this The nozzle insert 24 can be rotated manually and thus a slot located in the insert can be rotated manually be placed vertically or horizontally.

The upper end of the valve tappet 14 rests against a shoulder 30 in the spray head 1. Incidentally, the valve tappet is 14 fitted into complementary parts of the spray head 1 so that a tight, sealed fit is achieved.

When molding or casting, the valve stem 14 has received a very small annular projection 31, which extends into the opposite wall of the recess 26 of the spray head digs and a recess there by cold flow 32 forms, so that there is an excellent seal and a permanent connection between the valve stem 14 and Spray head 1 is achieved.

Likewise, according to FIG. 3, the cylindrical connecting channel 28 can be provided with an annular projection 33 which digs into the opposite material of the nozzle insert 24 and creates an effective seal through cold flow creates, in the course of which the nozzle insert 24 rotates, and can be brought into a desired position.

According to FIGS. 4-7, the nozzle insert 24 has a larger one integrally connected to the smaller inner section 29 Outer section 35, which has an end face 37 and whose basic circular shape is flattened opposite one another Side faces 38 is modified.

These flat side surfaces 38 facilitate alignment

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and the attachment of the nozzle insert 24 in the spray head Use after assembly to manually rotate the nozzle insert 24, if you have a vertical or horizontal wants to achieve aligned brushstroke spray pattern. The circular mouth 22 is with a channel and an enlarged inner channel 40 in connection. When the nozzle insert is fitted, the larger outer section remains 3 5 outside the spray head 1. The mouth 22 connects directly to the channel 39, and this is over a funnel-shaped widening section 41 is connected to the larger inner channel 40. Furthermore, the Inner section 29, preferably a conical section 42, incorporated on the outside, which facilitates the attachment and installation of the nozzle insert 24 in the spray head 1.

In the end face 37, a V-groove 23 is formed so that it intersects the mouth 22 or the channel 39 and ends in the flattened side surfaces 38. It is an essential feature of the invention that this V-groove 23 is open at both ends »It has been shown that the open slot ends prevent the accumulation of sprayed Material and prevents the formation of drops of this material.

The metering of the sprayed material can take place either in the spray mouth 22, in the channel 39 or in the slot 16, which depends on the relative cross-sectional ratios. In each case , the metering takes place at the narrowest cross-section.

The various components shown are mainly made of plastic, with the exception of the metal springs and some housing parts. Spray head 1 and valve

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plungers 14 are preferably made of molded plastic. When choosing the types of plastic used is · especially on the compatibility with the base and Pay attention to the propellant in the mixtures to be sprayed. The illustrated and described versions are expedient, relatively easy to manufacture, and produce the desired results.

Of course, various modifications of the embodiments described are possible within the scope of the invention.

In summary, the invention relates to an aerosol spray device with a spray head insert that emits a spray jet that is effectively comparable to a brush stroke is. The insert has a substantially circular outer surface, a central mouth, a die Outer surface as well as V-shaped cutting edges Groove, an outer and an inner section, the diameter of which is smaller than the diameter of the larger one Section. The inner section of the spray head insert is cylindrically shaped and in a cylindrical recess of the spray head fitted with a tight and sealing sliding seat. The V-shaped groove extends over the entire outer surface of the insert and is open at its outer ends. This is “an essential feature of the invention because these open ends prevent the accumulation and dripping of sprayed material.

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Claims (1)

Expectations l.yAerosol spray head with a central bore and a substantially horizontal, connecting the central bore with the outer surface of the spray head cylindrical channel, characterized in that in the cylindrical channel (28) of the spray head (1) a smaller inner portion (29) of an insert (24) is fitted with a tight sealing fit; that the Use also an enlarged outer section (35) with a central mouth (22) and a connection channel (39) which centrally penetrates with a smaller inner section which is integrally connected to the outer section arranged connection channel (40) are in communication; and that on the outside of the enlarged outer section (35) a continuous and open groove (23) is arranged up to its edge, which the central opening (22) and the connection channel (39) intersects. 2 ", spray head according to claim 1, characterized in that the enlarged outer section (35) of the insert (24 ) remains in its fully fitted state on the outside of the spray head (1). 3. Spray head according to claim 1, characterized in that the mouth connection channel (39) of the insert (24) with a widening section (41) in the larger central cylindrical connection channel (40) in the small 509814/0731 neren inner section (29) merges. 4. Spray head according to claim 1, 2 or 3, characterized in that the larger outer portion (35) of the Insert (24) has an essentially circular basic shape and two opposite flattened sides (38), the surfaces of which are perpendicular to the longitudinal axis of the groove (23); and that in these flattened side surfaces (38) are the open ends of the groove (23). 5. Spray head according to claim 1 or 4, characterized in that the groove (23) is V-shaped. 6. Spray head according to claim 1, 4 or 5, characterized in that that the diameter of the mouth (22) is equal to the height of the groove (23) (Fig.5). 7. Spray head according to claim 1, 4 or 5, characterized in that the diameter of the mouth (22) is larger than the height of the groove (23). 8. Spray head according to claim 1, 4 or 5, characterized in that that the diameter of the mouth (22) is smaller than the height of the groove (23). 9. Spray head according to claim 5, characterized in that the included angle of the groove (23) has a value between 30 ° to 160 °. 10. Spray head according to claim 9, characterized in that the included angle of the groove (23) has a value between 60 ° to 120 °. 5098U / 0731 ORIGINAL IMSPECTSD 11. Spray head according to claim 1, characterized in that
that from this a hollow shaft (14) extends (Fig. 1-3) 12. Spray head according to claim 11, characterized in that deß spray head (1) and shaft (14) releasably together
are connected (Fig. 2). 13. Spray head according to claim 11, characterized in that the spray head and shaft are integrally connected to one another are (Fig.3). 5098U / 0731