EP1373094B1 - Pressure pack aerosol can for mixing and discharging two-constituent materials - Google Patents

Pressure pack aerosol can for mixing and discharging two-constituent materials Download PDF

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Publication number
EP1373094B1
EP1373094B1 EP02732491A EP02732491A EP1373094B1 EP 1373094 B1 EP1373094 B1 EP 1373094B1 EP 02732491 A EP02732491 A EP 02732491A EP 02732491 A EP02732491 A EP 02732491A EP 1373094 B1 EP1373094 B1 EP 1373094B1
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EP
European Patent Office
Prior art keywords
inner sleeve
pressure pack
pursuant
disk
pack aerosol
Prior art date
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Expired - Lifetime
Application number
EP02732491A
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German (de)
French (fr)
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EP1373094A1 (en
EP1373094B9 (en
Inventor
Peter Kwasny
Christian Maras
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Peter Kwasny GmbH
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Peter Kwasny GmbH
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    • 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

Definitions

  • the invention relates to a pressure cell having a frame, a dome for receiving a valve, a vaulted bottom, an inner sleeve disposed on a plate, a ram arranged in the inner sleeve for rupturing the inner sleeve, which can be actuated through the plate, and the use of such Pressure boxes for 2-component systems.
  • Such pressure cans are particularly suitable for the storage and application of 2K sealing and insulating foams, 2K adhesives and 2K paints.
  • the invention also relates in particular to the formation of pressure cans, which in addition to the liquid substances of the main component in the inner sleeve receive a second component which reacts with the main component to the finished product, such as a multicomponent varnish.
  • a second component which reacts with the main component to the finished product, such as a multicomponent varnish.
  • the invention can also be used for 2K formulations for other purposes, such as 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 lacquer binder, solvents and the liquid propellant used to dispense the component.
  • the further component is present in a relatively small amount in an inner sleeve and usually consists of a fast-reacting with the main component compound, such as in the 2K system polyisocyanate / polyol.
  • catalysts may be present.
  • the component in the inner sleeve serves to cure and the quality of the product to influence, usually by accelerating the curing, increasing the strength or weather resistance, or the like.
  • the second component is usually introduced shortly before the application of the foam by blowing the lid of the inner container in the pressure cell and mixed by shaking therein.
  • a pressure cell is known with a formed by forming a metal molded part one-piece bottom.
  • a recess of this bottom of the externally threaded neck of an additional container is inserted and braced by means of a nut screwed from the outside under deformation of an O-ring seal between a shoulder of the additional container and the inner edge of the bottom recess.
  • the executed in turn by a piston-shaped seal in the interior of the additional container and sealed rod is designed as a shaft which rotates in the forme knownerhals and internally supported on this. 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 cell for discharging single- or multi-component substances is described, which has in its interior a further component receiving additional container.
  • the inner container has an inner lid, which can be blasted off via a guided on the bottom of the pressure cell to the interior of the inner container rod.
  • the plunger is movably mounted within the additional container and inserted through a arranged in the sickle plate of the can bottom seal.
  • a pressure cell according to WO 85/00157 A is shown in FIG.
  • Both prior art pressure cans have an inner sleeve, which is usually made of polyolefins.
  • Preferred material is polypropylene.
  • These plastics have been proven in and of themselves, but have the disadvantage that they are permeable to some propellant gas components and solvents, such as esters, ketones and aromatics, do not sufficiently support.
  • 2-component paints usually contain such solvents, what hitherto made their use of 2-component pressurized cans very difficult.
  • these cans because of the large number of items required for the production and their construction relatively expensive and expensive to manufacture. Due to the material, in particular in the interaction of plastic metal parts, there are always tightness problems that are difficult to control and lead again and again to faulty batches.
  • the invention is therefore the object of developing the known pressure doses so that the inner sleeve forms an absolutely tight against the contents of the pressure cell unit.
  • a pressure cell of the type mentioned in which either the inner sleeve is connected via a spring cage with the plate, the spring cage contains a trigger spring-mounted, which acts on the plunger, which plunger against a arranged at the can end of the inner sleeve cover and this detaches when actuated, between plunger and Trigger a membrane is arranged, which closes the inner sleeve at its plate-side end hermetically against the contents of the pressure cell, or wherein the inner sleeve is integrally formed on the arranged in the bottom of the can plate, the plate is mounted inside the inner sleeve, a spring cage, the spring cage has a trigger springs mounted, which acts on the plunger, which arranged the plunger against a at the can end of the inner sleeve Cover acts and this breaks off when pressed.
  • the inner sleeve is now provided on the plate side with a membrane or alternatively molded onto the bottom or sickening plate, so that in this critical region a complete separation - without the use of sealing elements - is given against the remaining contents of the can.
  • the inner sleeve used in the pressure cans according to the invention can be made of 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 bottom plate, however, only a corresponding pressure-resistant material can be used in pressurized pressurized with higher pressure, preferably aluminum. The use of tinplate is also possible. The techniques with which corresponding plastic and metal parts are manufactured are known to the skilled person in and of themselves.
  • the inner sleeves of the pressure cell according to the invention are made in one piece, both as the inner sleeve with membrane and as far as the inner sleeve with molded base plate.
  • the inner sleeve is connected via a spring cage to the base or valve plate of the pressure cell.
  • the bottom plate is preferably a plate, as it is used at the valve end of the pressure cell to integrate the valve unit in the can end.
  • Such plates can be made extremely simple and inexpensive.
  • the inner sleeve with membrane is connected to the plate via a spring cage.
  • the inner sleeve has a receptacle at its plate-side end, which serves for positive and / or non-positive fixing to the spring basket.
  • the Spring basket to improve the seat may have a circumferential projection or a circumferential groove around or into which the receptacle is or deformed into. Sealing elements are not required because penetration of the can contents into the inner sleeve is reliably prevented by the membrane.
  • the membrane is expediently at the transition of the inner sleeve for receiving.
  • a trigger is resiliently mounted, which acts on the membrane, through it and on the plunger in the inner sleeve.
  • the plate end of the trigger called trigger pin - protrudes through the plate out of the pressure box.
  • Pin and trigger can form a unit, but are separated when the inner sleeve on the valve disc; the trigger in this case has a receptacle in which engages the pin for triggering the inner sleeve, and in the after release of the can and removal of the pin a valve is used.
  • the spring travel is dimensioned so that the trigger reliably drives the plunger against the cover of the inner sleeve and this effetsprengt from its anchorage.
  • a spring travel of about 5 to 10 mm is fully sufficient; by the same spring travel of the trigger pin of the plunger protrudes from the plate bottom.
  • the can is pushed with the pin against a flat and solid surface, or the pin pressed by hand.
  • the spring sleeve with at least one opening in order to facilitate the pressure equalization between the box space and the interior of the spring sleeve.
  • these openings also have the purpose of allowing rapid filling of the pressure cell with propellant gas through the spring cage.
  • the filling takes place with pressures of up to 60 bar;
  • a rapid pressure relief must be guaranteed.
  • the total cross section is expediently in the ratio of 3: 1 to 6: 1 to the free cross section of the filling device.
  • the membrane of the inner sleeve thus closes the contents of the inner sleeve during the storage time of the can reliably against the remaining contents of the can.
  • the ram drives the cover of the inner sleeve in the pressure box, so that the sleeve content is free and can be mixed with the can contents.
  • the pressure cell contains a mixing aid, for example in the form of a freely movable steel ball.
  • the inner sleeve is integrally connected to the bottom plate, d. H.
  • Inner sleeve and plate are integrally formed.
  • the spring cage is inside the inner sleeve, on the inside of the bottom plate.
  • the trigger is actuated by means of pin through the plate of the soil and acts without having to pierce a membrane, directly on the plunger, which, as described above, the lid off. Due to the formation of a unit of base plate and inner sleeve, the plate-side hermetic closure of the inner sleeve against the pressure-dose contents is also ensured here.
  • the spring cage is fixed in a central configuration of the plate. This formation encloses the end of the spring basket, which widens outward on the bottom side, and prevents the spring cage from moving into the can with the movement of the pin / trigger
  • the inner sleeve of the pressure cell according to the invention is provided on the can side with a lid, which is sealed in the usual way with a groove mounted in an O-ring.
  • the groove is expediently in a part of the lid, which projects into the valve-side end of the inner sleeve.
  • the inner sleeve in the region of the lid seal has an inner projection which cooperates directly with the protruding part of the lid and gives the seat of the lid stability.
  • the plunger has, in an expedient embodiment, several wings along a central axis, in particular four wings. This leads to a stabilization of the position of the plunger in the inner sleeve, without an excessive volume requirement arises. To further reduce the volume of the plunger, may be provided recesses or openings. Since ram and trigger form separate units at least in the first variant, a separate leadership and stabilization of the plunger is essential. In the second embodiment, ram and trigger can form a unit.
  • the lid is expedient to provide a contact point between the plunger and the lid in the periphery of the plunger, for example in that the plunger has its cover-nearest point on the periphery of a wing. In this way, the lid is applied decentrally with force, which promotes the detachment process.
  • the festerkkrimpte in the central shape spring cage acts against the seal, so that leakage of the can contents is excluded by the plate.
  • the seal for example, a rubber seal, has the form of a pierced circular disk, through the center of which the pin of the trigger protrudes from the pressure box.
  • the trigger has at its plate-side end a projection which, expediently with a projecting edge, acts against the hole-disc-shaped seal in the plate and causes a partitioning also in the region of the pin to the outside.
  • the trigger has plate side, directly following the sealing projection, another projection which serves as an abutment for the coil spring guided in the spring cage As a further abutment is an arranged on the valve-side end of the spring cage inner projection.
  • the spring ensures a secure fit of the trigger with its sealing ring on the rubber seal and at the same time allows the indentation of the bolt by the desired length to trigger the inner sleeve.
  • the pressure cell according to the invention is otherwise manufactured and equipped in a conventional manner. This is especially true for the valve area, and the valve-side equipment, which allows to use the pressure cell both in manual mode and as a cartridge on spray guns.
  • 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, the dome and frame together and at the same time brings about a tight connection of the parts.
  • the dome 3 is made of a round plate, a molded part cut out of sheet metal, which has been obtained by forming the curved shape shown in the drawing.
  • the inner edge of the mandrel 3 is in turn flanged and receives a valve plate with a valve 4.
  • the bottom 5 is also connected via a flanged edge to the frame 2 and has in its center on a base plate 6, above which the inner sleeve 7 is located.
  • the inner sleeve 7 has a removable cover 8.
  • Inside the inner sleeve 7 is a plunger 9, whose end is led out through a sealing element 10 below from the pressure cell.
  • the plunger 9 on limiting elements, both of which act against the sealing element 10 and limit the free path length of the plunger 9 within the inner container 7.
  • the plunger 9 is pressed by striking the can bottom on a solid surface and placed in an upward movement.
  • the rubber-elastic sealing element 10 catches this upward movement and leads after breaking off the lid 8, the plunger 9 back to its original position.
  • the can according to FIG. 1 can be equipped according to the invention with the inner sleeves according to FIG. 2, 3 or 6.
  • Figure 2 shows an inventively manufactured and used for use inner sleeve 7 with plunger 9 and cover 8.
  • the inner sleeve 7 has a cylindrical wall and is closed on the plate side by a membrane.
  • the plate side is followed by a cylindrical receptacle 18, which serves for fixing on the spring basket 11.
  • the inner sleeve may be made of a suitable plastic, but is suitably made of aluminum.
  • suitable wall thicknesses for the wall about 0.3 to 0.8 mm, for the membrane about 0.05 to 0.10 mm.
  • the inner sleeve 7 is closed with a lid 8, which may be made of aluminum or plastic.
  • the cover 8 has circumferentially a groove 25 in which an O-ring seal is guided.
  • To further support the inner edge of the inserted into the sleeve lid acts against a circumferential projection 24 which stabilizes the seat of the lid and at the same time facilitates the breaking off of the lid with the plunger 9.
  • the guided in the inner sleeve 7 plunger 9 has four wings 17, which are cut out laterally to reduce the space required.
  • the plate side is a plate-shaped conclusion, which is located directly on the can side of the membrane 15.
  • the plunger 9 is chamfered in such a way that it has its lid-nearest point 16 in the periphery of a wing; upon actuation of the plunger 9, the lid is released from the projection 24 of the inner sleeve 7 and released into the can.
  • the inner sleeve 7 is plugged with its receptacle 18 on the can end of the spring basket 11 and so firmly connected to this that a detachment is excluded upon actuation of the trigger 12.
  • the spring basket 11 itself consists of a plastic sleeve, which is provided at its can end with an inner circumferential projection 21 which serves as an abutment for a coil spring 13 mounted therein.
  • the coil spring 13 is supported on the plate side to a circumferential projection 22 of the trigger 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 arranged in the plate 6 ring seal 20.
  • the trigger 12 terminates at its protruding from the plate 6 end in a bolt 14 which protrudes by the length of the can, the trigger 12 must be pushed in toproofsprengen over the plunger 9, the lid 8.
  • the spring sleeve 11 has plate-side an extension 27 which engages behind the inner molding 19 of the base plate 6 and ensures an immovable seat on the base plate 6.
  • the bottom 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 solid composite of plate 6, spring cage 11 and sealing rubber 20, due to the interaction of the indentation 28 of the plate 6 and the extension 27 of the spring cage eleventh
  • the trigger 12 is divided into the located within the spring basket section and a protruding pin 14, via which the triggering process is controlled.
  • a tip 29 is located immediately adjacent to the membrane 15 and acts on actuation against the bottom end of the Tappet 9. The membrane is destroyed, which promotes the escape of the contents of the inner sleeve into the can and the mixing of the two components.
  • a circumferential sealing seat 23 which protrudes from the pin 14 and acts with its protruding edge against the seal 20.
  • Figure 3 shows a second variant of an inner sleeve of a pressure cell according to the invention, in which the inner sleeve and plate 6 are integrally connected to each other. Also in this case, the inner shell is fully sealed off from the other contents of the can on the plate side. Moreover, the plunger and the spring cage have the construction shown in FIG. 2 and the same mode of action.
  • inner sleeve is made in one piece according to Figure 3, d. H. Inner sleeve 7 and plate 6 are not subsequently connected to each other.
  • the wall thicknesses of sleeve and membrane are also in the range of 0.3 to 0.8 mm. Gluing or soldering of inner sleeve and plate is also possible.
  • Figure 4 shows an inventively usable spring cage 11 with a can-side abutment 21 for the coil spring mounted therein and a plate provided extension 27 for Einkrimpung and fixing to the base plate 6.
  • the extension 27 in the form of a circumferential bead in this embodiment is accompanied by a Anschneidung 30 am inner edge and shape of a peripheral edge 31 which is pressed against the rubber seal 20 during Verkrimpungsprozeß with the plate 6.
  • FIG. 5 shows a trigger 12 which is used according to the invention and has a tip 29, the abutment 22 for the helical spring, the pin 14 and the part of the trigger and the pin 14 projecting relative to the spring-mounted part of the trigger, but opposite to the abutment 22 recessed sealing seat 23 which is provided with a against the seal 20 acting peripheral edge; in the sectional view, this represents 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 has the advantage that the aerosol can need not have a specially designed bottom portion.
  • the inner sleeve 7 with plunger 9 and cover 8 has the plate side, the membrane 15, which hermetically seals the inner sleeve to the plate.
  • the plate side is followed by a cylindrical receptacle 18, which serves for fixing on the spring cage 11
  • 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 on the can-side end of the spring cage 11 with this fixed, that a detachment upon actuation of the trigger 12 is excluded.
  • the connection is advantageously carried out in that the receptacle 18 is verclincht with the spring basket 11; preferably such that the free end of the receptacle 18 is guided around an outer peripheral projection 32 (see FIG. 7) of the spring cage 11.
  • the spring cage 11 with the trigger 12 is at the same time part of the valve mechanism, it is expedient to physically separate the trigger 12 from the trigger pin 14.
  • the trigger 12 has a receptacle 33 for the release pin 14, which receives the release pin for the release operation, from which the release pin can be pulled out again after triggering.
  • the same receptacle then receives a conventional valve head 4, as it is used for aerosol cans.
  • Preferred are so-called female valves with lateral slots and a pin which projects into the receptacle 33.
  • the pressure can contents through the opening (s) 34 flow into the spring cage and be discharged through the actuated valve 4 from the pressure cell.
  • the apertures 34 have a further function in connection with the filling of the can.
  • the filled inner sleeve is applied with the valve plate on the can end and crimped with this.
  • the can is filled with the propellant gas through the valve opening, typically propane, butane, dimethyl ether and / or fluorohydrocarbon (134a).
  • the filling of the can takes place with a pressure of up to 60 bar in order to make the process as short as possible in terms of time. At a pressure of up to 60 bar but there is a risk that the membrane 15 bursts under this pressure itself or by the action of the pressure-actuated trigger 12.
  • the openings 34 in the valve basket 11 are provided at the plate-side end of the valve basket, as close as possible to the valve itself.
  • the valve-side sealing is effected by a provided at its plate end sealing seat 23 in the form of a circumferential projection which against the seal 20 between the spring cage 11 and Plate 6 in the region of the central formation 19 acts.
  • 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 which corresponds to the distance of the trigger 12 to the diaphragm and further to the path of the plunger 9, this must cover the 8 for blowing off the cover.
  • the spring travel is correspondingly long.
  • FIG. 7 shows an illustration of the spring cage with trigger 12 according to FIG. 6 in detail.
  • the valve disk 6 has in its central region a molding 19 with an opening, in the can side, a seal 20 in the form of a perforated disc, preferably made of a rubber-like material is used.
  • the spring cage 11 is fixed via its extension 27.
  • the head edge arranged peripheral edge 31 acts against the rubber seal 20 and seals the can contents against the central opening in the plate and in the seal 20 from. Due to the Verkrimpungsprozeß in the formation of the spring cage 11 in the central indentation 19 of the valve disc 6, the individual components are positively and non-positively and sealingly connected.
  • the spring cage 11 has immediately below the fixing on the valve plate 6 openings 34, which allow the can contents to penetrate into the spring basket.
  • the coil spring 13 Inside the spring basket 11 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 coil spring 13 presses the trigger 12 with its peripheral 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 and pressed down strongly, so that the trigger 12 pierces the membrane 15 with its tip 29 and moves the plunger 9 located underneath against the cover 8. After tripping the trigger 12 returns to its rest position, so that the can remains closed to the outside.
  • the seal is effected by the interaction of the flanks of the trigger pin with the rubber seal 20th
  • a conventional valve is inserted into the recess 33, which is actuated by pressing.
  • the trigger moves by a defined path into the can so that the can contents can pass unhindered through the apertures 34 into and out of the spring cage.
  • the openings 34 also have the purpose of allowing the already sealed can with propellant gas to pass through the central opening in the gasket 20 to allow the propellant gas to travel quickly into the can contents.
  • the propellant gas supply through the gasket 20 through the propellant gas is pressed with the intended pressure in the spring sleeve, so that the trigger 12 moves by a defined path in the direction of the membrane 15, but without reaching them, so that after the release of the Openings 34, the gas can escape under relaxation laterally into the can.
  • Pressure cans according to the embodiment of Figure 6 are used in use "head down", that is, the valve points down. Pressure cans according to FIGS. 2 and 3 can be used upright when a riser pipe is introduced, or, in the absence of a riser pipe, upside down. The use with spray guns is possible and intended.
  • can side in the application refers to a can-inward arrangement
  • ish-side designates an arrangement to the respective plate (in the valve or bottom region).

Abstract

The invention relates to a pressure pack aerosol can comprised of a body blank ( 2 ), of a dome ( 3 ) for accommodating a valve ( 4 ), of an inwardly arched bottom ( 5 ), of an inner sleeve ( 7 ), which is arranged on a disk ( 6 ), and of a tappet ( 9 ), which is arranged inside the inner sleeve ( 7 ), which is provided for splitting open said inner sleeve ( 7 ) and which can be displaced therethrough by the disk ( 6 ). According to the invention, the inner sleeve ( 7 ) is joined to the disk ( 6 ) via a spring cage ( 11 ), and the spring cage ( 11 ) contains a release mechanism ( 12 ), which is spring-mounted and which acts upon the tappet ( 9 ). Said tappet ( 9 ), in turn, acts upon a cover ( 8 ), which is arranged on the can-side end of the inner sleeve ( 7 ), and splits the cover open when actuated. A diaphragm ( 15 ) is arranged between the tappet ( 9 ) and the release mechanism ( 12 ) and hermetically seals the inner sleeve ( 7 ), on its disk-side end, off from the contents of the pressure pack aerosol can ( 1 ).

Description

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, 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 cell having a frame, a dome for receiving a valve, a vaulted bottom, an inner sleeve disposed on a plate, a ram arranged in the inner sleeve for rupturing the inner sleeve, which can be actuated through the plate, and the use of such Pressure boxes for 2-component systems. Such pressure cans are particularly suitable for the storage and application of 2K sealing and insulating foams, 2K adhesives and 2K 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. Gleichermaßen 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 in the inner sleeve receive a second component which reacts with the main component to the finished product, such as a multicomponent varnish. Equally, however, the invention can also be used for 2K formulations for other purposes, such as 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 Hauptkomponente schnell reagierenden Verbindung, etwa im 2K-System Polyisocyanat/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, Erhöhung 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 lacquer binder, solvents and the liquid propellant used to dispense the component. The further component is present in a relatively small amount in an inner sleeve and usually consists of a fast-reacting with the main component compound, such as in the 2K system polyisocyanate / polyol. Optionally, catalysts may be present. The component in the inner sleeve serves to cure and the quality of the product to influence, usually by accelerating the curing, increasing the strength or weather resistance, or the like. The second component is usually introduced shortly before the application of the foam by blowing the lid of the inner container in the pressure cell and mixed by shaking therein.

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.From DE 82 27 229 U a pressure cell is known with a formed by forming a metal molded part one-piece bottom. In a recess of this bottom of the externally threaded neck of an additional container is inserted and braced by means of a nut screwed from the outside under deformation of an O-ring seal between a shoulder of the additional container and the inner edge of the bottom recess. The executed in turn by a piston-shaped seal in the interior of the additional container and sealed rod is designed as a shaft which rotates in the Zusatzbehälterhals and internally supported on this. 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 cell for discharging single- or multi-component substances is described, which has in its interior a further component receiving additional container. The inner container has an inner lid, which can be blasted off via a guided on the bottom of the pressure cell to the interior of the inner container rod. The plunger is movably mounted within the additional container and inserted through a arranged in the sickle plate of the can bottom seal. A pressure cell according to WO 85/00157 A is shown in FIG.

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 Estem, 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 prior art pressure cans have an inner sleeve, which is usually made of polyolefins. Preferred material is polypropylene. These plastics have been proven in and of themselves, but have the disadvantage that they are permeable to some propellant gas components and solvents, such as esters, ketones and aromatics, do not sufficiently support. In particular, 2-component paints usually contain such solvents, what hitherto made their use of 2-component pressurized cans very difficult. In addition, these cans, because of the large number of items required for the production and their construction relatively expensive and expensive to manufacture. Due to the material, in particular in the interaction of plastic metal parts, there are always tightness problems that are difficult to control and lead again and again to faulty batches.

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 the object of developing the known pressure doses so that the inner sleeve forms an absolutely tight against the contents of the pressure cell unit.

Diese Aufgabe wird mit einer Druckdose der eingangs genannten Art gelöst,
bei der entweder 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 Deckel wirkt und diesen bei Betätigung absprengt, wobei zwischen Stößel und Auslöser eine Membran angeordnet ist, weiche die Innenhülse an ihrem tellerseitigen Ende hermetisch gegen den Inhalt der Druckdose abschließt, oder
bei der die Innenhülse an den im Boden der Dose angeordneten Teller angeformt ist, am Teller innerhalb der Innenhülse ein Federkorb gelagert ist, der Federkorb einen Auslöser federn gelagert enthält, der auf den Stößel wirkt, welcher den Stößel gegen einen am dosenseitigen Ende der Innenhülse angeordneten Deckel wirkt und diesen bei Betätigung absprengt.This object is achieved with a pressure cell of the type mentioned,
in which either the inner sleeve is connected via a spring cage with the plate, the spring cage contains a trigger spring-mounted, which acts on the plunger, which plunger against a arranged at the can end of the inner sleeve cover and this detaches when actuated, between plunger and Trigger a membrane is arranged, which closes the inner sleeve at its plate-side end hermetically against the contents of the pressure cell, or
wherein the inner sleeve is integrally formed on the arranged in the bottom of the can plate, the plate is mounted inside the inner sleeve, a spring cage, the spring cage has a trigger springs mounted, which acts on the plunger, which arranged the plunger against a at the can end of the inner sleeve Cover acts and this breaks off when pressed.

Es wurde gefunden, daß ein Großteil der Probleme der aus dem Stand der Technik bekannten Druckdosen mit Innenhülsen aus der Abdichtung des Stößels gegen den Teller und die Innenhülse resultiert. Dagegen kann die Abschottung der Innenhülse gegen den Doseninhalt im Bereich des Hülsendeckels als unproblematisch angesehen werden; die dort anwendbare Dichttechnik mit in Nuten geführten Dichtringen hat sich als standfest und praktikabel erwiesen.It has been found that much of the problems with the prior art pressure cans with inner sleeves results from the sealing of the plunger against the plate and inner sleeve. In contrast, the partitioning of the inner sleeve against the can contents in the area of the sleeve cover can be regarded as unproblematic; the applicable sealing technique with guided in grooves sealing rings has proven to be stable and workable.

Erfindungsgemäß wird nun die Innenhülse tellerseitig mit einer Membran ausgestattet oder alternativ an den Boden- bzw. Sickenteller angeformt, so daß in diesem kritischen Bereich eine vollständige Abtrennung - ohne die Verwendung von Dichtelementen - gegen den übrigen Doseninhalt gegeben ist.According to the invention, the inner sleeve is now provided on the plate side with a membrane or alternatively molded onto the bottom or sickening plate, so that in this critical region a complete separation - without the use of sealing elements - is given against the remaining contents of the can.

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 cans according to the invention can be made of 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 bottom plate, however, only a corresponding pressure-resistant material can be used in pressurized pressurized with higher pressure, preferably aluminum. The use of tinplate is also possible. The techniques with which corresponding plastic and metal parts are manufactured are known to the skilled person in and of themselves.

Die Innenhülsen der erfindungsgemäßen Druckdose sind einstückig gefertigt, sowohl was die Innenhülse mit Membran als auch was die Innenhülse mit angeformten Bodenteller anbetrifft.The inner sleeves of the pressure cell according to the invention are made in one piece, both as the inner sleeve with membrane and as far as the inner sleeve with molded base plate.

Bei der erfindungsgemäßen Variante mit der an die Innenhülse angeformten Membran ist die Innenhülse über einen Federkorb mit dem Boden- oder Ventilteller der Druckdose verbunden. Bei dem Bodenteller handelt es sich vorzugsweise 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 Anprdnung der Innenhülse am Ventilteller im Dom der Dose. In diesem Fall kann der Bodenteller entfallen.In the variant according to the invention with the membrane molded onto the inner sleeve, the inner sleeve is connected via a spring cage to the base or valve plate of the pressure cell. The bottom plate is preferably a plate, as it is used at the valve end of the pressure cell to integrate the valve unit in the can end. Such plates can be made extremely simple and inexpensive. Thus, there is the advantage that the separate production of a part is not required for the bottom plate. Particularly advantageous, however, the Anprdnung the inner sleeve on the valve plate in the cathedral of the box. In this case, the bottom plate can be omitted.

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 Aufnahme und Federkorb miteinander verclincht oder verkriimpt, 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. Die Membran befindet sich zweckmäßigerweise am Übergang der Innenhülse zur Aufnahme.The inner sleeve with membrane is connected to the plate via a spring cage. This can be done, for example, that the inner sleeve has a receptacle at its plate-side end, which serves for positive and / or non-positive fixing to the spring basket. Appropriately, recording and spring basket are verclincht or crimped, the Spring basket to improve the seat may have a circumferential projection or a circumferential groove around or into which the receptacle is or deformed into. Sealing elements are not required because penetration of the can contents into the inner sleeve is reliably prevented by the membrane. The membrane is expediently at the transition of the inner sleeve for receiving.

Innerhalb der Federhülse ist ein Auslöser federnd gelagert, der auf die 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 den Deckel der Innenhülse treibt und diesen aus seiner Verankerung heraussprengt. 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.Within the spring sleeve, a trigger is resiliently mounted, which acts on the membrane, through it and on the plunger in the inner sleeve. The plate end of the trigger called trigger pin - protrudes through the plate out of the pressure box. Pin and trigger can form a unit, but are separated when the inner sleeve on the valve disc; the trigger in this case has a receptacle in which engages the pin for triggering the inner sleeve, and in the after release of the can and removal of the pin a valve is used. The spring travel is dimensioned so that the trigger reliably drives the plunger against the cover of the inner sleeve and this heraussprengt from its anchorage. In general, a spring travel of about 5 to 10 mm is fully sufficient; by the same spring travel of the trigger pin of the plunger protrudes from the plate bottom. To operate the plunger, the can is pushed with the pin against a flat and solid surface, or the pin pressed by hand.

Es ist vorteilhaft, die Federhüle 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 the pressure equalization between the box space and the interior of the spring sleeve. When the inner sleeve is arranged on the valve disk, these openings also have the purpose of allowing rapid filling of the pressure cell with propellant gas through the spring cage. The filling takes place with pressures of up to 60 bar; To avoid an untimely release of the inner sleeve by destroying the membrane during filling, a rapid pressure relief must be guaranteed. This takes place through the openings, the total cross section is expediently in the ratio of 3: 1 to 6: 1 to the free cross section of the filling device.

Die Membran der Innenhülse schließt also den Inhalt der Innenhülse während der Lagerzeit der Dose zuverlässig gegen den übrigen Doseninhalt ab. Nach Auslösen der Dose durch Betätigung des Auslösestift wird die Membran durchstoßen. Gleichzeitig treibt der Stößel den Deckel der Innenhülse in die Druckdose hinein, so daß der Hülseninhalt frei wird und mit dem Doseninhalt vermischt werden kann. Zu diesem Zweck ist es sinnvoll, daß die Druckdose eine Mischhilfe enthält, beispielsweise in Form einer darin frei beweglichen Stahlkugel.The membrane of the inner sleeve thus closes the contents of the inner sleeve during the storage time of the can reliably against the remaining contents of the can. To Triggering the can by pressing the trigger pin pierces the membrane. At the same time the ram drives the cover of the inner sleeve in the pressure box, so that the sleeve content is free and can be mixed with the can contents. For this purpose, it makes sense that the pressure cell contains a mixing aid, for example in the form of a freely movable steel ball.

In der alternativen Ausführungsform der erfindungsgemäßen Druckdose ist die Innenhülse integral mit dem Bodenteller verbunden, d. h. Innenhülse und Teller sind einstückig ausgebildet. 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, den Deckel absprengt. Durch die Ausbildung einer Einheit aus Bodenteller und Innenhülse ist auch hier die tellerseitige hermetische Abschließung der Innenhülse gegen den Druckdoseninhalt gewährleistet.In the alternative embodiment of the pressure box according to the invention, the inner sleeve is integrally connected to the bottom plate, d. H. Inner sleeve and plate are integrally formed. In this case, the spring cage is inside the inner sleeve, on the inside of the bottom plate. The trigger is actuated by means of pin through the plate of the soil and acts without having to pierce a membrane, directly on the plunger, which, as described above, the lid off. Due to the formation of a unit of base plate and inner sleeve, the plate-side hermetic closure of the inner sleeve against the pressure-dose contents is also ensured here.

In beiden-Ausführungsförmen 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 bewegtIn both embodiments, the spring cage is fixed in a central configuration of the plate. This formation encloses the end of the spring basket, which widens outward on the bottom side, and prevents the spring cage from moving into the can with the movement of the pin / trigger

Die Innenhülse der erfindungsgemäßen Druckdose ist dosenseitig mit einem Deckel versehen, der auf übliche Art und Weise mit einem in einer Nut gelagerten O-Ring abgedichtet ist. Dabei befindet sich die Nut zweckmäßigerweise in einem Teil des Deckels, der in das ventilseitige Ende der Innenhülse hineinragt. Gleichzeitig ist es zweckmäßig, daß die Innenhülse im Bereich der Deckeldichtung einen inneren Vorsprung aufweist, der unmittelbar mit dem hineinragenden Teil des Deckels zusammenwirkt und dem Sitz des Deckels Stabilität verleiht.The inner sleeve of the pressure cell according to the invention is provided on the can side with a lid, which is sealed in the usual way with a groove mounted in an O-ring. In this case, the groove is expediently in a part of the lid, which projects into the valve-side end of the inner sleeve. At the same time, it is expedient that the inner sleeve in the region of the lid seal has an inner projection which cooperates directly with the protruding part of the lid and gives the seat of the lid stability.

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 der zweiten Ausführungsvariante können Stößel und Auslöser eine Einheit bilden.The plunger has, in an expedient embodiment, several wings along a central axis, in particular four wings. This leads to a stabilization of the position of the plunger in the inner sleeve, without an excessive volume requirement arises. To further reduce the volume of the plunger, may be provided recesses or openings. Since ram and trigger form separate units at least in the first variant, a separate leadership and stabilization of the plunger is essential. In the second embodiment, ram and trigger can form a unit.

Um das Absprengen des Deckels zu erleichtern, ist es zweckmäßig, einen Kontaktpunkt zwischen Stößel und Deckel in der Peripherie des Stößels vorzusehen, etwa dadurch, daß der Stößel seinen deckel-nächsten Punkt an der Peripherie eines Flügels aufweist. Auf diese Art und Weise wird der Deckel dezentral mit Kraft beaufschlagt, was den Ablöseprozeß fördert.In order to facilitate the breaking off of the lid, it is expedient to provide a contact point between the plunger and the lid in the periphery of the plunger, for example in that the plunger has its cover-nearest point on the periphery of a wing. In this way, the lid is applied decentrally with force, which promotes the detachment process.

In beiden Ausführungsformen befindet sich eine Dichtung zwischen Federkorb und Teller im Bereich der zentralen Ausformung. Der in der zentralen Ausformung 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 region of the central formation. The festerkkrimpte in the central shape spring cage acts against the seal, so that leakage of the can contents is excluded by the plate. The seal, for example, a rubber seal, has the form of a pierced circular disk, through the center of which the pin of the trigger protrudes from the pressure box. The trigger has at its plate-side end a projection which, expediently with a projecting edge, acts against the hole-disc-shaped seal in the plate and causes a partitioning also in the region of the pin to the outside.

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 Auslösung der Innenhülse.The trigger has plate side, directly following the sealing projection, another projection which serves as an abutment for the coil spring guided in the spring cage As a further abutment is an arranged on the valve-side end of the spring cage inner projection. The spring ensures a secure fit of the trigger with its sealing ring on the rubber seal and at the same time allows the indentation of the bolt by the desired length to trigger 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 is especially true for the valve area, and the valve-side equipment, which allows to use the pressure cell both in manual mode and as a cartridge on spray guns.

Die Erfindung wird durch die beigefügten Abbildungen näher erläutert. Es zeigen

Figur 1
eine Druckdose mit Innenhülse gemäß WO 85/00157 A;
Figur 2
eine Innenhülse für eine erfindungsgemäße Druckdose gemäß einer ersten Ausführungsform zur Anordnung an einem Bodenteller,
Figur 3
eine Innenhülse für eine erfindungsgemäße Druckdose gemäß einer zweiten Ausführungsform;
Figur 4
einen Federkorb für eine erfindungsgemäße Druckdose; und
Figur 5
einen Auslöser für eine erfindungsgemäße Druckdose;
Figur 6
eine Innenhülse für eine erfindungsgemäße Druckdose zur Anordnung an einem Ventilteller; und
Figur 7
den Tellerbereich der Ausführungsform gemäß Figur 6.
The invention is further illustrated by the accompanying drawings. Show it
FIG. 1
a pressure cell with inner sleeve according to WO 85/00157 A;
FIG. 2
an inner sleeve for a pressure cell according to the invention according to a first embodiment for placement on a base plate,
FIG. 3
an inner sleeve for a pressure cell according to the invention according to a second embodiment;
FIG. 4
a spring basket for a pressure cell according to the invention; and
FIG. 5
a trigger for a pressure cell according to the invention;
FIG. 6
an inner sleeve for a pressure cell according to the invention for arrangement on a valve disc; and
FIG. 7
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 Figure 1 consists of a frame 2, which is closed at the upper end with a dome 3. The dome 3 has a flanged edge, the dome and frame together and at the same time brings about a tight connection of the parts. The dome 3 is made of a round plate, a molded part cut out of sheet metal, which has been obtained by forming the curved shape shown in the drawing. The inner edge of the mandrel 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 verbunden 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 Aufwärtsbewegung auf und führt nach Absprengen des Deckels 8 den Stößel 9 in seine Ausgangsposition zurück.The bottom 5 is also connected via a flanged edge to the frame 2 and has in its center on a base plate 6, above which the inner sleeve 7 is located. The inner sleeve 7 has a removable cover 8. Inside the inner sleeve 7 is a plunger 9, whose end is led out through a sealing element 10 below from the pressure cell. On both sides of the sealing element 10, the plunger 9 on limiting elements, 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 break off the lid 8 from the inner container 7, the plunger 9 is pressed by striking the can bottom on a solid surface and placed in an upward movement. The rubber-elastic sealing element 10 catches this upward movement and leads after breaking off the lid 8, the plunger 9 back to its original position.

Die Dose gemäß Figur 1 kann erfindunüsgemäß mit den Innenhülsen gemäß Figur 2, 3 oder 6 ausgerüstet werden.The can according to FIG. 1 can be equipped according to the invention 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.Figure 2 shows an inventively manufactured and used for use inner sleeve 7 with plunger 9 and cover 8. The inner sleeve 7 has a cylindrical wall and is closed on the plate side by a membrane. The plate side is followed by a cylindrical receptacle 18, which serves for fixing on the spring basket 11.

Die Innenhülse kann aus einem dafür geeigneten Kunststoff gefertigt sein, ist jedoch zweckmäßigerweise aus Aluminium gefertigt. Bei Fertigung aus Aluminium sind geeignete Wandstärken für die Wandung etwa 0,3 bis 0,8 mm, für die Membran etwa 0,05 bis 0,10 mm.The inner sleeve may be made of a suitable plastic, but is suitably made of aluminum. When made of aluminum suitable wall thicknesses for the wall about 0.3 to 0.8 mm, for the membrane about 0.05 to 0.10 mm.

Dosenseitig ist die Innenhülse 7 mit einem Deckel 8 verschlossen, der aus Aluminium oder Kunststoff gefertigt sein kann. Der Deckel 8 weist umlaufend eine Nut 25 auf, in der ein O-Dichtring geführt ist. Zur weiteren Abstützung wirkt der Innenrand des in die Hülse hineingeführten Deckels gegen einen umlaufenden Vorsprung 24, der den Sitz des Deckels stabilisiert und gleichzeitig das Absprengen des Deckels mit dem Stößel 9 erleichtert.On the can side, the inner sleeve 7 is closed with a lid 8, which may be made of aluminum or plastic. The cover 8 has circumferentially a groove 25 in which an O-ring seal is guided. To further support the inner edge of the inserted into the sleeve lid acts against a circumferential projection 24 which stabilizes the seat of the lid and at the same time facilitates the breaking off of the lid with the plunger 9.

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 Membran 15 befindet. Dosenseitig ist der Stößel 9 dergestalt abgeschrägt, daß er in der Peripherie eines Flügels seinen deckel-nächsten Punkt 16 aufweist; bei Betätigung des Stößels 9 wird der Deckel vom Vorsprung 24 der Innenhülse 7 gelöst und in die Dose freigesetzt. Die Innenhülse 7 ist mit ihrer Aufnahme 18 auf das dosenseitige Ende des Federkorbs 11 aufgesteckt und mit diesem so fest verbunden, daß ein Ablösen bei Betätigung des Auslösers 12 ausgeschlossen ist.The guided in the inner sleeve 7 plunger 9 has four wings 17, which are cut out laterally to reduce the space required. The plate side is a plate-shaped conclusion, which is located directly on the can side of the membrane 15. On the can side, the plunger 9 is chamfered in such a way that it has its lid-nearest point 16 in the periphery of a wing; upon actuation of the plunger 9, the lid is released from the projection 24 of the inner sleeve 7 and released into the can. The inner sleeve 7 is plugged with its receptacle 18 on the can end of the spring basket 11 and so firmly connected to this that a detachment is excluded upon actuation of the trigger 12.

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 Schraubenfeder 13 stützt sich tellerseitig an einen umlaufenden Vorsprung 22 des Auslösers 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 basket 11 itself consists of a plastic sleeve, which is provided at its can end with an inner circumferential projection 21 which serves as an abutment for a coil spring 13 mounted therein. The coil spring 13 is supported on the plate side to a circumferential projection 22 of the trigger 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 arranged in the plate 6 ring seal 20. The trigger 12 terminates at its protruding from the plate 6 end in a bolt 14 which protrudes by the length of the can, the trigger 12 must be pushed in to abzusprengen over the plunger 9, the lid 8.

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 plate-side an extension 27 which engages behind the inner molding 19 of the base plate 6 and ensures an immovable seat on the base plate 6. During manufacture, the bottom 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 solid composite of plate 6, spring cage 11 and sealing rubber 20, due to the interaction of the indentation 28 of the plate 6 and the extension 27 of the spring cage eleventh

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 Membran 15 und wirkt bei Betätigung gegen das bodenseitige Ende des Stößels 9. Die Membran 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, der gegenüber dem Stift 14 hervorspringt und mit seiner vorstehenden Kante gegen die Dichtung 20 wirkt.The trigger 12 is divided into the located within the spring basket section and a protruding pin 14, via which the triggering process is controlled. A tip 29 is located immediately adjacent to the membrane 15 and acts on actuation against the bottom end of the Tappet 9. The membrane is destroyed, which promotes the escape 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 is also a circumferential sealing seat 23 which protrudes 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 und Teller 6 integral miteinander verbunden sind. Auch in diesem Fall ist tellerseitig die Innenhülse vollständig gegen den übrigen Doseninhalt abgeschottet. Stößel und Federkorb haben im übrigen den in Figur 2 gezeigten Aufbau und die gleiche Wirkungsweise.Figure 3 shows a second variant of an inner sleeve of a pressure cell according to the invention, in which the inner sleeve and plate 6 are integrally connected to each other. Also in this case, the inner shell is fully sealed off from the other contents of the can on the plate side. Moreover, the plunger and the spring cage have the construction shown in FIG. 2 and the same mode of action.

Das Fehlen der Membran in der Ausführungsform gemäß Figur 3 erlaubt es, in einer weiteren alternativen Ausführungsform Auslöser 12 und Stößel 9 als eine Einheit vorzusehen. Eine Spitze am Äuslöser 12 zur Durchstoßung der in Figur 2 vorgesehenen Membran ist nicht mehr erforderlich.The absence of the membrane in the embodiment according to FIG. 3 makes it possible, in a further alternative embodiment, to provide trigger 12 and plunger 9 as one unit. A tip on the remover 12 for piercing the membrane provided in Figure 2 is no longer required.

Es ist festzuhalten, daß die Innenhülse gemäß Figur 3 einstückig gefertigt ist, d. h. Innenhülse 7 und Teller 6 nicht nachträglich miteinander verbunden sind. Die Wandstärken von Hülse und Membran liegen auch hier im Bereich von 0,3 bis 0,8 mm. Ein Verkleben oder Verlöten von Innenhülse und Teller ist aber ebenfalls möglich.It should be noted that the inner sleeve is made in one piece according to Figure 3, d. H. Inner sleeve 7 and plate 6 are not subsequently connected to each other. The wall thicknesses of sleeve and membrane are also in the range of 0.3 to 0.8 mm. Gluing or soldering of inner sleeve and plate is also possible.

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 Einkrimpung 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 Verkrimpungsprozeß mit dem Teller 6 gegen die Gummidichtung 20 gepreßt wird.Figure 4 shows an inventively usable spring cage 11 with a can-side abutment 21 for the coil spring mounted therein and a plate provided extension 27 for Einkrimpung and fixing to the base plate 6. The extension 27 in the form of a circumferential bead in this embodiment is accompanied by a Anschneidung 30 am inner edge and shape of a peripheral edge 31 which is pressed against the rubber seal 20 during Verkrimpungsprozeß with the plate 6.

Figur 5 schließlich zeigt einen erfindungsgemäß zum Einsatz kommenden Auslöser 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.Finally, FIG. 5 shows a trigger 12 which is used according to the invention and has a tip 29, the abutment 22 for the helical spring, the pin 14 and the part of the trigger and the pin 14 projecting relative to the spring-mounted part of the trigger, but opposite to the abutment 22 recessed sealing seat 23 which is provided with a against the seal 20 acting peripheral edge; in the sectional view, this represents 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 hat den Vorteil, daß die Aerosoldose keinen besonders gestalteten Bodenbereich aufweisen muß. Die Innenhülse 7 mit Stößel 9 und Deckel 8 weist tellerseitig die 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 dientThe arrangement of the inner sleeve on the valve plate has the advantage that the aerosol can need not have a specially designed bottom portion. The inner sleeve 7 with plunger 9 and cover 8 has the plate side, the membrane 15, which hermetically seals the inner sleeve to the plate. The plate side is followed by a cylindrical receptacle 18, which serves for fixing on the spring cage 11

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 on the can-side end of the spring cage 11 with this fixed, that a detachment upon actuation of the trigger 12 is excluded. The connection is advantageously carried out in that the receptacle 18 is verclincht with the spring basket 11; preferably such that the free end of the receptacle 18 is guided around an outer peripheral 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 Auslöser 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 anschließend einen herkömmlichen Ventilkopf 4 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 at the same time part of the valve mechanism, it is expedient to physically separate the trigger 12 from the trigger pin 14. For this purpose, the trigger 12 has a receptacle 33 for the release pin 14, which receives the release pin for the release operation, from which the release pin can be pulled out again after triggering. The same receptacle then receives a conventional valve head 4, as it is used for aerosol cans. Preferred are so-called female valves with lateral slots and a pin which projects into the receptacle 33.

Um den Zugang des Doseninhaltes in die Federhülse und damit zum Ventil zu erleichtern, ist es zweckmäßig, im Federkorb selbst wenigstens eine Durchbrechung 34 vorzusehen. Nach Auslösung der Innenhülse und Austausch des Auslösestiftes 14 gegen ein Ventil 4 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 the access of the can contents in the spring sleeve and thus the valve, it is expedient to provide at least one opening 34 in the spring cage itself. After release of the inner sleeve and replacement of the trigger pin 14 against a valve 4, the pressure can contents through the opening (s) 34 flow into the spring cage and be discharged through the actuated valve 4 from the pressure cell.

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 erforderlich. 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 Befüllungsnadel, durch den das Treibgas in die Druckdose einströmt, entspricht.In the embodiment according to FIG. 6, the apertures 34 have a further function in connection with the filling of the can. After filling the can, the filled inner sleeve is applied with the valve plate on the can end and crimped with this. Following this, the can is filled with the propellant gas through the valve opening, typically propane, butane, dimethyl ether and / or fluorohydrocarbon (134a). The filling of the can takes place with a pressure of up to 60 bar in order to make the process as short as possible in terms of time. At a pressure of up to 60 bar but there is a risk that the membrane 15 bursts under this pressure itself or by the action of the pressure-actuated trigger 12. To counteract this danger, a relaxation of the gases as quickly as possible after entry into the can is required. Such relaxation is achieved by the arrangement of one or more larger openings 34 in the spring basket 11. It is expedient to provide these passage 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 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 ventilseitige Abdichtung erfolgt durch einen an seinem tellerseitigen Ende vorgesehenen 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 vorzusehen, um beim Befüllen der Druckdose mit Treibgas eine gewisse Auslenkung des Auslösers 12 ohne Gefahr für die 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 Absprengen des Deckels 8 zurücklegen muß, entspricht. Entsprechend lang ist der Federweg ausgelegt.The openings 34 in the valve basket 11 are provided at the plate-side end of the valve basket, as close as possible to the valve itself. The valve-side sealing is effected by a provided at its plate end sealing seat 23 in the form of a circumferential projection which against the seal 20 between the spring cage 11 and Plate 6 in the region of the central formation 19 acts. Compared 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 without danger to the membrane 15 when filling the pressure cell with propellant gas. 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 which corresponds to the distance of the trigger 12 to the diaphragm and further to the path of the plunger 9, this must cover the 8 for blowing off the cover. The spring travel is 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 zentrale Öffnung im Teller und in der Dichtung 20 ab. Durch den Verkrimpungsprozeß 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.FIG. 7 shows an illustration of the spring cage with trigger 12 according to FIG. 6 in detail. The valve disk 6 has in its central region a molding 19 with an opening, in the can side, a seal 20 in the form of a perforated disc, preferably made of a rubber-like material is used. In the area of the formation 19, the spring cage 11 is fixed via its extension 27. The head edge arranged peripheral edge 31 acts against the rubber seal 20 and seals the can contents against the central opening in the plate and in the seal 20 from. Due to the Verkrimpungsprozeß in the formation of the spring cage 11 in the central indentation 19 of the valve disc 6, the individual components are positively and non-positively and sealingly connected.

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 11 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 Zustand 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.The spring cage 11 has immediately below the fixing on the valve plate 6 openings 34, which allow the can contents to penetrate into the spring basket. Inside the spring basket 11 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 coil spring 13 presses the trigger 12 with its peripheral edge 23 against the sealing rubber 20, so that the pressure cell is closed in this state.

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 den Deckel 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.To trigger the inner sleeve 12, the trigger pin 14 is inserted into the recess 33 of the trigger and pressed down strongly, so that the trigger 12 pierces the membrane 15 with its tip 29 and moves the plunger 9 located underneath against the cover 8. After tripping the trigger 12 returns to its rest position, so that the can remains closed to the outside. During the triggering process, the seal is effected by the interaction of the flanks of the trigger pin with the rubber seal 20th

Zum Ausbringen des Doseninhaltes wird in die Ausnehmung 33 ein herkömmliches 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 hinauslangen kann.For discharging the can contents, a conventional valve is inserted into the recess 33, which is actuated by pressing. In this case, the trigger moves by a defined path into the can so that the can contents can pass unhindered through the apertures 34 into and out of the spring cage.

Die Durchbrechungen 34 haben des weiteren den Zweck, ein Befüllen der bereits 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 allowing the already sealed can with propellant gas to pass through the central opening in the gasket 20 to allow the propellant gas to travel quickly into the can contents. For this purpose, with the propellant gas supply through the gasket 20 through the propellant gas is pressed with the intended pressure in the spring sleeve, so that the trigger 12 moves by a defined path in the direction of the membrane 15, but without reaching them, so that after the release of the Openings 34, the gas can escape under relaxation laterally into the can.

Druckdosen gemäß der Ausführungsform nach Figur 6 werden beim Gebrauch "kopfunter" eingesetzt, das heißt das Ventil weist nach unten. Druckdosen gemäß 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 of Figure 6 are used in use "head down", that is, the valve points down. Pressure cans according to FIGS. 2 and 3 can be used upright when a riser pipe is introduced, or, in the absence of a riser pipe, upside down. 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, während "tellerseitig" eine Anordnung zum jeweiligen Teller (im Ventil- oder Bodenbereich) bezeichnet.In connection, it should be noted that the term "can side" in the application refers to a can-inward arrangement, while "dish-side" designates an arrangement to the respective plate (in the valve or bottom region).

Claims (22)

  1. A pressure pack aerosol can with a body blank (2), a dome (3) to accommodate a valve (4), a inwardly arched bottom (5), inner sleeve (7) arranged at a disk (6), a tappet (9) arranged at the inner sleeve (7) to split-off the inner sleeve (7) and being able to be actuated through the disk (6), characterized in that the inner sleeve (7) is connected via a spring cage (11) with the disk (6), said spring cage (11) having a spring-mounted release mechanism (12) acting on the tappet (9), said tappet (9) acting against a cover (8) arranged at the can-side end of the inner sleeve (7) and splitting it off when actuated, with a diaphragm (15) being arranged between tappet (9) and release mechanism (12), which seals the inner sleeve (7) at its bottom disk-side end hermetically against the contents of the pressure pack aerosol can (1), said diaphragm (15) and inner sleeve (7) being fabricated as a one-partite unit.
  2. A pressure pack aerosol can pursuant to Claim 1, characterized in that the inner sleeve (7) has a take-up (18) at its outer end for fixing at the spring cage (11).
  3. A pressure pack aerosol can pursuant to Claim 2, characterized in that the diaphragm (15) is arranged at the transition from the inner sleeve (7) to the take-up (18).
  4. A pressure pack aerosol can pursuant to Claim 2 or Claim 3, characterized in that the take-up (18) is clinched with a spring cage (11).
  5. A pressure pack aerosol can pursuant to Claim 4, characterized in that the free end of the take-up (18) is guided around an externally circumferential projection (32) of the spring cage (11).
  6. A pressure pack aerosol can pursuant to any of the preceding claims, characterized in that the inner sleeve is arranged at a disk (6) in the bottom (5) of the pressure pack aerosol can (1).
  7. A pressure pack aerosol can pursuant to any of the preceding Claims 1 to 5, characterized in that the disk (6) with the inner sleeve (7) are arranged in the dome (3) of the pressure pack aerosol can (1).
  8. A pressure pack aerosol can pursuant to Claim 7, characterized in that the release mechanism (12) has a take-up (33) for a tripping pin (14) or a valve (4).
  9. A pressure pack aerosol can with a body blank (2), a dome (3) to accommodate a valve (4), a bottom (5), an inner sleeve (7) arranged at a disk (6), a tappet (9) arranged in the inner sleeve (7) to split-up the inner sleeve (7) and able to be actuated through the disk (6), characterized in that the inner sleeve (7) is molded to the disk (6) arranged in the bottom (5) of the can (1), and that a spring cage (11) rests at the disk (6) inside the inner sleeve (7), said spring cage (11) containing a spring-mounted release mechanism (12) acting on the tappet (9), said tappet (9) acting against a cover (8) arranged at the can-side end of the inner sleeve (7) and splitting it off when actuated, said inner sleeve (7) and said disk (6) being a one-partite configuration.
  10. A pressure pack aerosol can pursuant to any of the preceding Claims 1 to 9, characterized in that the spring cage (11) is fixed in a central formation (19) of the disk (6).
  11. A pressure pack aerosol can pursuant to any of the preceding claims, characterized in that the inner sleeve (7) and the cover (8) are sealed through an O-ring (26) resting in a groove (25).
  12. A pressure pack aerosol can pursuant to any of the preceding claims, characterized in that the tappet (9) has several wings (17) along a central axis.
  13. A pressure pack aerosol can pursuant to Claim 12, characterized in that the tappet (9) has its cover-nearest point (16) at the periphery of a wing (17).
  14. A pressure pack aerosol can pursuant to any of the preceding Claims 12 and 13, characterized in that the wings (17) have cutouts and/or recesses.
  15. A pressure pack aerosol can pursuant to any of the preceding claims, characterized by a sealing (20) between spring cage (11) and disk (6) in the area of the central formation (19).
  16. A pressure pack aerosol can pursuant to any of the preceding claims, characterized in that the spring cage (11) has an internal projection (21) as an abutment for a spring element (13) at its valve-side end.
  17. A pressure pack aerosol can pursuant to Claim 11, characterized in that the release mechanism (12) at its disk-side end has a peripheral projection (22) serving as abutment for the spring element (13).
  18. A pressure pack aerosol can pursuant to any of the preceding claims, characterized in that the release mechanism (12) at its disk-side end has a sealing seat (23) in form of a circumferential projection.
  19. A pressure pack aerosol can pursuant to any of the preceding claims, characterized in that the inner sleeve (7) in the area of the cover (8) has an inner projection (24) which co-acts with the cover (8).
  20. A pressure pack aerosol can pursuant to any of the preceding claims, characterized in that the inner sleeve (7) is made of aluminum.
  21. A pressure pack aerosol can pursuant to any of the preceding claims, characterized in that the spring cage (11) has at least one breakthrough (34).
  22. The use of a pressure pack aerosol can pursuant to any of the preceding Claims 1 to 21 for liquid two-constituent systems (2K-systems), particularly for 2K-sealing foams, adhesives, or lacquers.
EP02732491A 2001-03-23 2002-03-15 Pressure pack aerosol can for mixing and discharging two-constituent materials Expired - Lifetime EP1373094B9 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10114624 2001-03-23
DE10114624A DE10114624B4 (en) 2001-03-23 2001-03-23 Pressure cell and its use for 2-component systems
PCT/EP2002/002885 WO2002076852A1 (en) 2001-03-23 2002-03-15 Pressure pack aerosol can for mixing and discharging two-constituent materials

Publications (3)

Publication Number Publication Date
EP1373094A1 EP1373094A1 (en) 2004-01-02
EP1373094B1 true EP1373094B1 (en) 2006-08-09
EP1373094B9 EP1373094B9 (en) 2006-12-13

Family

ID=7678953

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02732491A Expired - Lifetime EP1373094B9 (en) 2001-03-23 2002-03-15 Pressure pack aerosol can for mixing and discharging two-constituent materials

Country Status (15)

Country Link
US (1) US7204392B2 (en)
EP (1) EP1373094B9 (en)
JP (1) JP3999668B2 (en)
AT (1) ATE335682T1 (en)
BR (1) BR0208345B1 (en)
CA (1) CA2472769C (en)
CY (1) CY1105764T1 (en)
CZ (1) CZ297239B6 (en)
DE (2) DE10114624B4 (en)
DK (1) DK1373094T3 (en)
ES (1) ES2272717T3 (en)
PL (1) PL199824B1 (en)
PT (1) PT1373094E (en)
RU (1) RU2283809C2 (en)
WO (1) WO2002076852A1 (en)

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CN105966781A (en) * 2016-07-06 2016-09-28 中国人民解放军第七五医院 Semi-automatic mixed two-component spray tank

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DE10144133A1 (en) * 2001-09-07 2003-03-27 Peter Kwasny Gmbh Two-component paint-spray can, especially e.g. for repairing cars, contains a curable epoxy resin stock component, solvent and propellant gas, with a hardener in a separate, externally-activated tube inside the can
DE10260117A1 (en) * 2002-12-19 2004-07-01 Peter Kwasny Gmbh Pressure can for mixing and dispensing two-component materials
ATE421471T1 (en) * 2004-12-28 2009-02-15 Nanosys Gmbh PRESSURE CAN FOR DELIVERING MULTI-COMPONENT SUBSTANCE CONTAINED THEREIN
US20070095828A1 (en) * 2005-10-28 2007-05-03 Edward Schapiro Snack food container
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DE102007006097A1 (en) * 2007-02-02 2008-08-07 Kwasny Gmbh Two-component pressure box with sealed release mechanism
GB2485604A (en) * 2010-11-22 2012-05-23 Martin Chard Device for marking a surface
JP6099319B2 (en) * 2012-04-27 2017-03-22 北海製罐株式会社 Mixed aerosol container
MY185337A (en) 2014-12-10 2021-05-06 Orientus Ind Sdn Bhd A single hole single action aerosol can
CN104609044A (en) * 2015-01-26 2015-05-13 中山市美捷时包装制品有限公司 Piercing type valve
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Also Published As

Publication number Publication date
RU2283809C2 (en) 2006-09-20
DE10114624A1 (en) 2002-10-02
CA2472769C (en) 2009-12-08
DK1373094T3 (en) 2006-12-11
CY1105764T1 (en) 2011-02-02
CZ297239B6 (en) 2006-10-11
ATE335682T1 (en) 2006-09-15
EP1373094A1 (en) 2004-01-02
CA2472769A1 (en) 2002-10-03
CZ20032562A3 (en) 2005-02-16
PL366452A1 (en) 2005-02-07
JP3999668B2 (en) 2007-10-31
WO2002076852A1 (en) 2002-10-03
EP1373094B9 (en) 2006-12-13
US7204392B2 (en) 2007-04-17
JP2004523437A (en) 2004-08-05
BR0208345A (en) 2004-03-23
PL199824B1 (en) 2008-11-28
DE50207790D1 (en) 2006-09-21
US20040144808A1 (en) 2004-07-29
DE10114624B4 (en) 2006-05-04
BR0208345B1 (en) 2012-05-29
PT1373094E (en) 2006-12-29
ES2272717T3 (en) 2007-05-01

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