EP0042128B1 - Aerosol container for dispensing pressurized liquids - Google Patents

Aerosol container for dispensing pressurized liquids Download PDF

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Publication number
EP0042128B1
EP0042128B1 EP81104394A EP81104394A EP0042128B1 EP 0042128 B1 EP0042128 B1 EP 0042128B1 EP 81104394 A EP81104394 A EP 81104394A EP 81104394 A EP81104394 A EP 81104394A EP 0042128 B1 EP0042128 B1 EP 0042128B1
Authority
EP
European Patent Office
Prior art keywords
additional container
aerosol
container
closure
additional
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81104394A
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German (de)
French (fr)
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EP0042128A1 (en
Inventor
Wilhelm Segatz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ara Werk Kraemer GmbH and Co
Original Assignee
Ara Werk Kraemer GmbH and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Ara Werk Kraemer GmbH and Co filed Critical Ara Werk Kraemer GmbH and Co
Priority to AT81104394T priority Critical patent/ATE5134T1/en
Publication of EP0042128A1 publication Critical patent/EP0042128A1/en
Application granted granted Critical
Publication of EP0042128B1 publication Critical patent/EP0042128B1/en
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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
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/32—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging two or more different materials which must be maintained separate prior to use in admixture
    • B65D81/3216—Rigid containers disposed one within the other
    • B65D81/3222—Rigid containers disposed one within the other with additional means facilitating admixture

Definitions

  • the invention relates to an aerosol can for dispensing pressurized liquids.
  • polyurethane foam pre-products which is associated with an additional container, which forms an undetachable structural unit with the aerosol can and wherein the interior of the aerosol can and the interior of the additional container are separated from one another by a common wall which can be opened at least at one point.
  • a pack of activating agents for one-component polyurethane foam is known from German Offenlegungsschrift 2 917 495.
  • This pack consists of a pressure container in which the activating agent and a propellant are provided under increased pressure.
  • the primary product for the one-component polyurethane foam is in an aerosol can, which is under less pressure. It is therefore possible to drive the activating agent into the aerosol can under the higher pressure of the propellant by connecting the discharge valves of the two pressure vessels.
  • the additional container is opened for the purpose of mutual mixing by a kind of implosion of the additional container by increasing the pressure in the aerosol can. Problems can arise here because it is not easy to see from the outside whether the additional container is actually imploded. In addition, it is also possible for the additional container to be opened only to such an extent that pressure equalization takes place between the aerosol can and the additional container, but mixing of the contents on both sides is not adequately guaranteed.
  • the invention is therefore based on the object to provide a combination of an aerosol can or a similar pressure vessel for dispensing pressurized liquids with an additional container, in which a clear assignment is guaranteed, so that it is always possible to use the right additive in the right one Mix amount with the contents of the aerosol can.
  • a complete union of can contents and container contents should be possible with certainty.
  • the invention is characterized in that the space of the additional container available for receiving an additive can be reduced in an adjustable manner.
  • the additional container is therefore an integrated part of the aerosol can. This makes it much easier to handle the combination, at the same time preventing mix-ups and also eliminating the possibility for the processor to make changes to the combination of the two containers, thereby avoiding incorrect mixing.
  • the space of the additional container available for receiving the additive is defined, preferably down to zero. This reduction in the volume of the additional container makes it possible to dispense its contents into the aerosol can in a defined manner, so that the can space is available as a common space for the contents of both containers.
  • the volume of the additional container is generally 5 to 20%, preferably approximately 10%, of the volume of the aerosol can.
  • the volume ratio can be different and is adapted to the particular application. It is also z. B. possible to keep only one thinner in the additional container, which can be mixed with the contents of the can if necessary.
  • the combination of aerosol can and additional container according to the invention can also be used in an outstanding manner for the production of a two-component foam or for the separate storage of its components.
  • the contents of the aerosol can and the contents of the additional container are separated from one another by a common wall which can be opened at least at one point, so that the mutual Mixing can take place.
  • the opening can take place, for example, by tearing open, breaking through, puncturing, for which purpose appropriate devices are provided.
  • the common wall advantageously has at least one releasable closure, which preferably cannot be closed again, so that the space of the additional container is permanently connected to that of the aerosol can or its contents can be transferred into it.
  • the common wall can be opened by a pressure exerted by the inside of the additional container on the wall, in particular on a closure, which is preferably a pneumatic and / or hydraulic pressure which is generated by a pressure piston in the interior of the additional container is produced.
  • This pressure is expediently generated only when necessary.
  • the pressure in the container is usually at most the same, preferably a lower, pressure than in the aerosol can.
  • the additional container therefore preferably contains no propellant or compressed gas.
  • the additional container is considerably smaller than the aerosol can. Therefore, in a preferred embodiment of the invention, the additional container is arranged in the can itself.
  • the additional container can advantageously be firmly connected to the can, in particular to the bottom of the can.
  • mechanical links which serve to dispense the contents of the container or to open the container can preferably be guided through the can wall and / or container wall at the connection point.
  • a membrane or the like, and preferably a cover or a stopper, can be provided as a releasable closure in the common wall of the aerosol can and the additional container.
  • the additional container is formed by a pressure cylinder, one end of which is provided with a releasable closure and in which a pressure piston which is displaceable in the direction of the closure is arranged in a sealing manner.
  • the thus variable space for the content of the additional container is located between the pressure piston and the closure.
  • the pressure piston can be moved mechanically, preferably by means of a plunger, in particular a screw spindle, in the direction of the closure.
  • the plunger is passed through the container wall, preferably at a point at which the additional container is connected to the can with the formation of a seal to the outside, in particular on the bottom of the can.
  • the pressure cylinder preferably its end facing away from the closure, is sealingly attached to the edge of an opening provided in the container wall, and the plunger is guided through this opening into the pressure cylinder.
  • the printing cylinder can be attached to the edge of the wall opening with the aid of a rubber seal, for example by screwing or tensioning.
  • the length of the plunger is advantageously dimensioned such that the closure can also be mechanically pushed out of the cylinder by means of the piston.
  • the drawing shows a longitudinal section through an embodiment of the invention.
  • an aerosol can with a volume of approximately 300 ml for a one-component polyurethane foam pre-product is provided as the storage container for the liquid to be dispensed.
  • the can can of course be larger or smaller.
  • the can 1 is tapered on its dispensing side in the usual way and is sealed there with a so-called clinch cover 2, which carries a conventional aerosol tilting valve 3.
  • the aerosol can is formed in one piece, i. H. the bottom 4 of the aerosol can, which is slightly drawn in, merges seamlessly into the cylindrical outer jacket 5 of the can.
  • the bottom can also be designed as a separate cover and connected to the jacket in a sealing manner.
  • a sealed additional container 6 which is arranged coaxially with the aerosol can and protrudes into the interior of the aerosol can from the base 4 to which it is attached.
  • a threaded end 7 is passed through a bore 8 in the can bottom 4 and rests with a shoulder 9 with the interposition of a rubber seal 10 sealingly against the edge of the bore.
  • a threaded nut 11 screwed onto the end 7 of the additional container 6 ensures a tight, sealing fit.
  • the additional container 6 has a cylindrical wall 18. Its outer diameter is approximately 1/3 of the diameter of the can.
  • the end 12 of the additional container 6 facing away from the bottom 4 is closed with a conventional plastic stopper 13, which has lateral sealing lips 14, and with its widened outer edge 15 rests on the end face of the cylindrical additional container, so that it cannot be pressed into the container .
  • a cylindrical thrust piston 16 which is sealingly guided in the cylindrical additional container. The space in the additional container between the plug 13 and the thrust piston 16 serves as a space separate from the space of the aerosol can for storing one with the contents of the aerosol can mixing liquid.
  • a threaded spindle 17 is used, which projects through the end 7 of the additional container, which is fastened to the bottom of the can, and is guided in a corresponding counter thread.
  • the length of the spindle is measured so that the piston 16 can be guided close to the end 12 of the additional container 6.
  • the contents of the additional container can be completely dispensed, which is particularly advantageous for pasty masses.
  • this is not necessary, since the plug 13 is pressed out after a short advance of the thrust piston 16 by the pressurized liquid in the additional container, so that it can flow out and mix with the contents of the aerosol can. Since the aerosol can is not completely filled anyway for safety reasons, such mixing is possible in a simple manner.
  • the additional container protrudes from the bottom 4 to approximately the center of the aerosol can 1 and its space available for receiving the additional liquid corresponds to approximately 5 to 10% of the remaining interior space of the aerosol can.
  • This volume is sufficient to accommodate an accelerator, which is mixed with the polyurethane foam pre-product shortly before it is dispensed, in order to achieve faster curing, if desired.
  • the combination of aerosol can or other pressure container and additional container according to the invention can also be used for mixing other liquids to be dispensed from the pressure container.
  • the opening of the additional container provided with the plug 13 or another openable closure can also be kept very small, so that only the liquid part after opening the closure emerges from the additional container, which is pushed out of the additional container when the thrust piston 16 is advanced by the corresponding reduction in volume.
  • the opening in the additional container formed by removing the closure is kept in diameter in the same order of magnitude as that of the additional container.
  • Conventional aerosol cans can be used for the invention, the bottom or bottom cover of which is opened for the insertion of the additional container, whereupon the additional container is sealingly attached to the can base. This avoids the complex construction of the known can combinations.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

1. Aerosol can for dispensing pressurized liquids, particularly polyurethane foam initial products, with which is associated an additional container (6), which forms an undetachable constructional unit with the aerosol can (1), the inner area of aerosol can (1) and the inner area of additional container (6) being separated from one another by a common wall (18), which can be opened at at least one point, characterized in that the area in the additional container (6) for containing an additional substance can be reduced in an ajustable manner.

Description

Die Erfindung betrifft eine Aerosoldose zur Ausgabe von unter Druck stehenden Flüssigkeiten. insbesondere Polyurethanschaum-Vorprodukten, der ein Zusatzbehälter zugeordnet ist, der mit der Aerosoldose eine unverlierbare Baueinheit bildet und wobei der Innenraum der Aerosoldose und der Innenraum des Zusatzbehälters durch eine gemeinsame Wand voneinander getrennt sind, die an mindestens einer Stelle öffenbar ist.The invention relates to an aerosol can for dispensing pressurized liquids. in particular polyurethane foam pre-products, which is associated with an additional container, which forms an undetachable structural unit with the aerosol can and wherein the interior of the aerosol can and the interior of the additional container are separated from one another by a common wall which can be opened at least at one point.

Aus der deutschen Offenlegungsschrift 2 917 495 ist eine Packung aus Aktivierungsmittel für Einkomponenten-Polyurethanschaum bekannt. Diese Packung besteht aus einem Druckbehälter, in dem das Aktivierungsmittel und ein Treibmittel unter erhöhtem Druck vorgesehen sind. Das Vorprodukt für den Einkomponenten-Polyurethanschaum befindet sich in einer Aerosoldose, die unter geringerem druck steht. Es ist deshalb möglich, das Aktivierungsmittel unter dem höheren Druck des Treibmittels durch Verbinden der Ausgabeventile der beiden Druckbehälter in die Aerosoldose zu treiben. Da Polyurethanschaum-Vorprodukte in verschiedenen Dosengrößen im Handel sind und dementsprechend auch die Größe der zugehörigen Zusatzbehälter variiert, besteht die Gefahr, daß bewußt oder unbewußt Verwechslungen stattfinden, einzelne Zusatzbehälter verlorengehen oder im Verhältnis zur Aerosoldose zu große Zusatzbehälter verwendet werden, die dann nur teilweise in diese entleert werden, was alles dazu führt, daß der Polyurethanschaum nicht, mit der Formulierung gebildet wird, die für die Erzielung gewünschter Eigenschaften wesentlich ist. Auch bei den aus der deutschen Offenlegungsschrift 1 959 925 bekannten Dosen ist eine richtige Vermischung nicht immer gewährleistet. Bei dem dort beschriebenen Behälter zur getrennten Lagerung und Vermischung von mindestens zwei Produkten ist innerhalb einer Aerosoldose ein zweiter Behälter bzw. Zusatzbehälter angeordnet, wobei die Aerosoldose ein Produkt und der Zusatzbehälter ein weiteres Produkt enthält. Das Öffnen des Zusatzbehälters zum Zwecke der gegenseitigen Vermischung erfolgt durch eine Art « Implosion des Zusatzbehälters, indem der Druck in der Aerosoldose erhöht wird. Hier können Probleme auftreten, weil von außen her nicht ohne weiters erkennbar ist, ob der Zusatzbehälter tatsächlich implodiert ist. Außerdem ist es auch möglich, daß der Zusatzbehälter nur so weit geöffnet wird, daß ein Druckausgleich zwischen Aerosoldose und Zusatzbehälter erfolgt, aber eine Vermischung des beiderseitigen Inhalts nicht hinreichend gewährleistet ist.A pack of activating agents for one-component polyurethane foam is known from German Offenlegungsschrift 2 917 495. This pack consists of a pressure container in which the activating agent and a propellant are provided under increased pressure. The primary product for the one-component polyurethane foam is in an aerosol can, which is under less pressure. It is therefore possible to drive the activating agent into the aerosol can under the higher pressure of the propellant by connecting the discharge valves of the two pressure vessels. Since polyurethane foam precursors are available in various can sizes and the size of the associated additional containers varies accordingly, there is a risk that consciously or unconsciously confusion will occur, individual additional containers will be lost or additional containers that are too large in relation to the aerosol can will be used, which are then only partially used these are emptied, which means that the polyurethane foam is not formed with the formulation that is essential for achieving the desired properties. Even with the cans known from German Offenlegungsschrift 1 959 925, correct mixing is not always guaranteed. In the container described there for the separate storage and mixing of at least two products, a second container or additional container is arranged within an aerosol can, the aerosol can containing one product and the additional container containing another product. The additional container is opened for the purpose of mutual mixing by a kind of implosion of the additional container by increasing the pressure in the aerosol can. Problems can arise here because it is not easy to see from the outside whether the additional container is actually imploded. In addition, it is also possible for the additional container to be opened only to such an extent that pressure equalization takes place between the aerosol can and the additional container, but mixing of the contents on both sides is not adequately guaranteed.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Kombination einer Aerosoldose oder einem ähnlichen Druckbehälter zur Ausgabe von unter Druck stehenden Flüssigkeiten mit einem Zusatzbehälter zu schaffen, bei der eine eindeutige Zuordnung gewährleistet ist, so daß es stets möglich ist, den richtigen Zusatzstoff in der richtigen Menge mit dem Inhalt der Aerosoldose zu vermischen. Außerdem soll eine vollständige Vereinigung von Doseninhalt und Behälterinhalt mit Sicherheit möglich sein.The invention is therefore based on the object to provide a combination of an aerosol can or a similar pressure vessel for dispensing pressurized liquids with an additional container, in which a clear assignment is guaranteed, so that it is always possible to use the right additive in the right one Mix amount with the contents of the aerosol can. In addition, a complete union of can contents and container contents should be possible with certainty.

Die Erfindung ist dadurch gekennzeichnet, daß der für die Aufnahme eines Zusatzstoffes vorhandene Raum des Zusatzbehälters einstellbar zu verkleinern ist. Der Zusatzbehälter ist somit ein integrierter Bestandteil der Aerosoldose. Dadurch kann die Handhabung der Kombination wesentlich einfacher erfolgen, wobei Verwechslungen gleichzeitig ausgeschlossen sind und dem Verarbeiter auch die Möglichkeit genommen ist, Änderungen an der Kombination der beiden Behälter vorzunehmen, wodurch Fehlabmischungen vermieden werden.The invention is characterized in that the space of the additional container available for receiving an additive can be reduced in an adjustable manner. The additional container is therefore an integrated part of the aerosol can. This makes it much easier to handle the combination, at the same time preventing mix-ups and also eliminating the possibility for the processor to make changes to the combination of the two containers, thereby avoiding incorrect mixing.

Bei der bekannten Kombination aus Zusatzbehälter und Aerosoldose besteht weiterhin die Gefahr, daß ein Teil des Aktivierungsmittels beim Überführen in den Aerosolbehälter im Zusatzbehälter verbleibt und zwar insbesondere dann, wenn beim Zusatzbehälter Treibgasverluste auftreten und so die restliche Treibmittelmenge nicht mehr ausreicht, um das Aktivierungsmittel in die Aerosoldose zu überführen. Dies kann insbesondere dann auftreten, wenn der Zusatzbehälter beim Überführen flach gehalten wird, so daß ein Druckausgleich zwischen den beiden Behältern erfolgt, bevor das Aktivierungsmittel überführt wird.In the known combination of additional container and aerosol can, there is still the risk that part of the activating agent remains in the additional container when it is transferred to the aerosol container, in particular if propellant gas losses occur in the additional container and the remaining amount of propellant is no longer sufficient to pass the activating agent into the Transfer aerosol can. This can occur in particular if the additional container is kept flat during the transfer, so that a pressure equalization takes place between the two containers before the activating agent is transferred.

Gemäß der Erfindung ist der für die Aufnahme des Zusatzstoffes vorhandene Raum des Zusatzbehälters definiert, vorzugsweise bis auf Null, verkleinerbar. Durch diese Verkleinerung des Volumens des Zusatzbehälters ist es möglich, seinen Inhalt in definierter Weise in die Aerosoldose auszugeben, so daß der Dosenraum als gemeinsamer Raum für die Inhaltsstoffe beider Behälter zur Verfügung steht.According to the invention, the space of the additional container available for receiving the additive is defined, preferably down to zero. This reduction in the volume of the additional container makes it possible to dispense its contents into the aerosol can in a defined manner, so that the can space is available as a common space for the contents of both containers.

Dient die Aerosoldose zur Ausgabe von Vorprodukten für einen Einkomponenten-Polyurethanschaum, dann liegt das Volumen des Zusatzbehälters in der Regel bei 5 bis 20 %, vorzugsweise ca. 10%, des Volumens der Aerosoldose. Bei anderen Produkten, z. B. zur Herstellung von Zweikomponentenlacken, kann das Volumenverhältnis anders seinund wird dem jeweiligen Anwendungszweck angepaßt. Auch ist es z. B. möglich, im Zusatzbehälter lediglich einen Verdünner aufzubewahren, der bei Bedarf mit dem Doseninhalt vermischt werden kann. Die Kombination aus Aerosoldose und Zusatzbehälter nach der Erfindung kann in hervorragender Weise auch zur Herstellung eines 2-Komponentenschaumes bzw. zur getrennten Aufbewahrung seiner Komponenten verwendet werden.If the aerosol can serves to dispense preliminary products for a one-component polyurethane foam, then the volume of the additional container is generally 5 to 20%, preferably approximately 10%, of the volume of the aerosol can. For other products, e.g. B. for the production of two-component paints, the volume ratio can be different and is adapted to the particular application. It is also z. B. possible to keep only one thinner in the additional container, which can be mixed with the contents of the can if necessary. The combination of aerosol can and additional container according to the invention can also be used in an outstanding manner for the production of a two-component foam or for the separate storage of its components.

Der Inhalt der Aerosoldose und der Inhalt des Zusatzbehälters sind durch eine gemeinsame Wand voneinander getrennt, die an mindestens einer Stelle öffenbar ist, so daß die gegenseitige Vermischung stattfinden kann. Das Öffnen kann beispielsweise durch Aufreißen, Durchbrechen, Durchstoßen erfolgen, wozu entsprechende Einrichtungen vorgesehen sind. Mit Vorteil weist die gemeinsame Wand mindestens einen lösbaren Verschluß auf, der vorzugsweise nicht wieder verschließbar ist, so daß der Raum des Zusatzbehälters bleibend mit dem der Aerosoldose verbunden ist bzw. sein Inhalt in diese überführbar ist.The contents of the aerosol can and the contents of the additional container are separated from one another by a common wall which can be opened at least at one point, so that the mutual Mixing can take place. The opening can take place, for example, by tearing open, breaking through, puncturing, for which purpose appropriate devices are provided. The common wall advantageously has at least one releasable closure, which preferably cannot be closed again, so that the space of the additional container is permanently connected to that of the aerosol can or its contents can be transferred into it.

Bei einer bevorzugten Ausführungsform der Erfindung ist die gemeinsame Wand durch einen vom Behälterinneren des Zusatzbehälters auf die Wand, insbesondere auf einen Verschluß ausgeübten Druck öffenbar, wobei es sich vorzugsweise um einen pneumatischen und/oder hydraulischen Druck handelt, der durch einen Druckkolben im Inneren des Zusatzbehälters erzeugt wird. Dieser Druck wird zweckmäßigerweise erst im Bedarfsfalle erzeugt. Im Ruhezustand herrscht im Behälter in der Regel höchstens der gleiche, vorzugsweise ein geringerer Druck als in der Aerosoldose. Der Zusatzbehälter enthält deshalb vorzugsweise kein Treibmittel bzw. Druckgas.In a preferred embodiment of the invention, the common wall can be opened by a pressure exerted by the inside of the additional container on the wall, in particular on a closure, which is preferably a pneumatic and / or hydraulic pressure which is generated by a pressure piston in the interior of the additional container is produced. This pressure is expediently generated only when necessary. In the idle state, the pressure in the container is usually at most the same, preferably a lower, pressure than in the aerosol can. The additional container therefore preferably contains no propellant or compressed gas.

In der Regel ist der Zusatzbehälter erheblich kleiner als die Aerosoldose. Deshalb ist bei einer bevorzugten Ausführungsform der Erfindung der Zusatzbehälter in der Dose Selbst angeordnet. Der Zusatzbehälter kann mit Vorteil mit der Dose, insbesondere mit dem Dosenboden, fest verbunden sein. Hierbei können mechanische Glieder, die zur Ausgabe des Behälterinhalts bzw. zur Öffnung des Behälters dienen, vorzugsweise an der Verbindungsstelle durch die Dosenwand und/oder Behälterwand hindurchgeführt sein.As a rule, the additional container is considerably smaller than the aerosol can. Therefore, in a preferred embodiment of the invention, the additional container is arranged in the can itself. The additional container can advantageously be firmly connected to the can, in particular to the bottom of the can. In this case, mechanical links which serve to dispense the contents of the container or to open the container can preferably be guided through the can wall and / or container wall at the connection point.

Als lösbarer Verschluß in der gemeinsamen Wand von Aerosoldose und Zusatzbehälter kann eine Membrane o. dgl. und vorzugsweise ein Deckel oder ein Stopfen vorgesehen sein. Bei einer Ausführungsform der Erfindung wird der Zusatzbehälter von einem Druckzylinder gebildet, dessen eines Ende mit einem lösbaren Verschluß versehen ist und in dem ein in Richtung zu dem Verschluß verschiebbarer Druckkolben abdichtend angeordnet ist. Der somit veränderliche Raum für den Inhalt des Zusatzbehälters befindet sich zwischen Druckkolben und Verschluß. Der Druckkolben ist mechanisch, vorzugsweise mittels eines Stößels, insbesondere einer Schraubspindel in Richtung zum Verschluß bewegbar. Hierzu ist der Stößel durch die Behälterwand hindurchgeführt und zwar vorzugsweise an einer Stelle, an der der Zusatzbehälter mit der Dose unter Ausbildung einer Abdichtung nach außen verbunden ist, insbesondere am Dosenboden. So ist bei einer Ausführungsform der Erfindung der Druckzylinder, vorzugsweise sein vom Verschluß abweisendes Ende, abdichtend am Rande einer in der Behälterwand vorgesehenen Öffnung befestigt, und der Stößel ist durch dies Öffnung hindurch in den Druckzylinder geführt. Die Befestigung des Druckzylinders am Rande der Wandungsöffnung kann unter Zuhilfenahme einer Gummidichtung, beispielsweise durch Verschrauben oder Verspannen erfolgt sein. Die Länge des Stößels ist mit Vorteil so bemessen, daß der Verschluß auch mechanisch mittels des Kolbens aus dem Zylinder herausdrückbar ist. In der Regel ist dies jedoch nicht erforderlich, da der Kolben bei seiner Bewegung in Richtung auf den Verschluß den Inhalt des Zusatzbehälters unter Druck setzt, so daß der Verschluß durch den Behälterinhalt hinausgedrückt wird. Auf jeden Fall ist sichergestellt, daß der lösbare Verschluß mit Sicherheit geöffnet und der Behälterinhalt vollständig in die Dose entleert ist, wenn der Kolben bis zum Verschlußende des Zylinders gedrückt ist.A membrane or the like, and preferably a cover or a stopper, can be provided as a releasable closure in the common wall of the aerosol can and the additional container. In one embodiment of the invention, the additional container is formed by a pressure cylinder, one end of which is provided with a releasable closure and in which a pressure piston which is displaceable in the direction of the closure is arranged in a sealing manner. The thus variable space for the content of the additional container is located between the pressure piston and the closure. The pressure piston can be moved mechanically, preferably by means of a plunger, in particular a screw spindle, in the direction of the closure. For this purpose, the plunger is passed through the container wall, preferably at a point at which the additional container is connected to the can with the formation of a seal to the outside, in particular on the bottom of the can. Thus, in one embodiment of the invention, the pressure cylinder, preferably its end facing away from the closure, is sealingly attached to the edge of an opening provided in the container wall, and the plunger is guided through this opening into the pressure cylinder. The printing cylinder can be attached to the edge of the wall opening with the aid of a rubber seal, for example by screwing or tensioning. The length of the plunger is advantageously dimensioned such that the closure can also be mechanically pushed out of the cylinder by means of the piston. As a rule, however, this is not necessary since the piston presses the contents of the additional container as it moves in the direction of the closure, so that the closure is pushed out by the contents of the container. In any case, it is ensured that the releasable closure is opened with certainty and the contents of the container are completely emptied into the can when the piston is pressed to the end of the closure of the cylinder.

Weitere Merkmale der Erfindung ergeben sich aus der folgenden Beschreibung einer bevorzugten Ausführungsform in Verbindung mit den Ansprüchen und der Zeichnung.Further features of the invention result from the following description of a preferred embodiment in conjunction with the claims and the drawing.

Die Zeichnung zeigt einen Längsschnitt durch eine Ausführungsform der Erfindung.The drawing shows a longitudinal section through an embodiment of the invention.

Bei der in der Zeichnung dargestellten Ausführungsform ist als Vorratsbehälter für die auszugebende Flüssigkeit eine einen Rauminhalt von ca. 300 ml besitzende Aerosoldose für ein Einkomponenten-Polyurethanschaum-Vorprodukt vorgesehen. Die Dose kann natürlich auch größer oder kleiner sein. Die Dose 1 ist an ihrer Ausgabeseite in üblicher Weise verjüngt und ist dort abdichtend mit einem sog. Clinchdeckel 2 verschlossen, der ein übliches Aerosol-Kippventil 3 trägt. Im übrigen ist die Aerosoldose einstückig ausgebildet, d. h. der Boden 4 der Aerosoldose, der leicht eingezogen ist, geht nahtlos in den zylindrischen Außenmantel 5 der Dose über.In the embodiment shown in the drawing, an aerosol can with a volume of approximately 300 ml for a one-component polyurethane foam pre-product is provided as the storage container for the liquid to be dispensed. The can can of course be larger or smaller. The can 1 is tapered on its dispensing side in the usual way and is sealed there with a so-called clinch cover 2, which carries a conventional aerosol tilting valve 3. Otherwise, the aerosol can is formed in one piece, i. H. the bottom 4 of the aerosol can, which is slightly drawn in, merges seamlessly into the cylindrical outer jacket 5 of the can.

Der Boden kann jedoch auch als gesonderter Deckel ausgebildet und mit dem Mantel abdichtend verbunden sein. In der Aerosoldose 1 befindet sich ein dichter Zusatzbehälter 6, der koaxial zur Aerosoldose angeordnet ist und vom Boden 4 aus, an dem er befestigt ist, in den Innenraum der Aerosoldose hineinragt. Zur Befestigung des Zusatzbehälters ist ein mit einem Gewinde versehenes Ende 7 durch eine Bohrung 8 im Dosenboden 4 hindurchgeführt und liegt mit einer Schulter 9 unter Zwischenlage einer Gummidichtung 10 abdichtend am Rand der Bohrung an. Eine auf das Ende 7 des Zusatzbehälters 6 geschraubte Gewindemutter 11 sorgt für einen festen abdichtenden Sitz. Der Zusatzbehälter 6 besitzt eine zylindrische Wandung 18. Sein Außendurchmesser beträgt etwa 1/3 des Durchmessers der Dose.However, the bottom can also be designed as a separate cover and connected to the jacket in a sealing manner. In the aerosol can 1 there is a sealed additional container 6, which is arranged coaxially with the aerosol can and protrudes into the interior of the aerosol can from the base 4 to which it is attached. To attach the additional container, a threaded end 7 is passed through a bore 8 in the can bottom 4 and rests with a shoulder 9 with the interposition of a rubber seal 10 sealingly against the edge of the bore. A threaded nut 11 screwed onto the end 7 of the additional container 6 ensures a tight, sealing fit. The additional container 6 has a cylindrical wall 18. Its outer diameter is approximately 1/3 of the diameter of the can.

Das vom Boden 4 abweisende Ende 12 des Zusatzbehälters 6 ist mit einem herkömmlichen Kunststoff-Stopfen 13 verschlossen, der seitliche Dichtlippen 14 aufweist, und mit seinem verbreiterter Außenrand 15 auf der Stirnseite des zylindrischen Zusatzbehälters aufliegt, so daß er nicht in den Behälter hineingedrückt werden kann. Im Zusatzbehälter 6 befindet sich außerdem noch ein zylindrischer Schubkolben 16, der abdichtend im zylindrischen Zusatzbehälter geführt ist. Der Raum im Zusatzbehälter zwischen Stopfen 13 und Schubkolben 16 dient als vom Raum der Aerosoldose getrennter Raum für die Aufbewahrung einer mit dem Inhalt der Aerosoldose zu mischenden Flüssigkeit.The end 12 of the additional container 6 facing away from the bottom 4 is closed with a conventional plastic stopper 13, which has lateral sealing lips 14, and with its widened outer edge 15 rests on the end face of the cylindrical additional container, so that it cannot be pressed into the container . In the additional container 6 there is also a cylindrical thrust piston 16 which is sealingly guided in the cylindrical additional container. The space in the additional container between the plug 13 and the thrust piston 16 serves as a space separate from the space of the aerosol can for storing one with the contents of the aerosol can mixing liquid.

Zum Vorschub des Schubkolbens 16 in Richtung auf den Stopfen 13 dient eine mit einem Gewinde versehene Spindel 17, die durch das am Dosenboden befestigte Ende 7 des Zusatzbehälters in diesen hineinragt und in einem entsprechenden Gegengewinde geführt ist. Dabei ist die Länge der Spindel so gemessen, daß der Kolben 16 bis nahe an das Ende 12 des Zusatzbehälters 6 geführt werden kann. Auf diese Weise kann der Inhalt des Zusatzbehälters vollständig ausgegeben werden, was insbesondere bei pastösen Massen vorteilhaft ist. In der Regel ist dies jedoch nicht notwendig, da der Stopfen 13 bereits nach kurzem Vorschub des Schubkolbens 16 durch die unter Druck gesetzte Flüssigkeit im Zusatzbehälter herausgedrück wird, so daß diese herausfließen und sich mit dem Inhalt der Aerosoldose vermischen kann. Da die Aerosoldose aus Sicherheitsgründen ohnehin nicht vollständig gefüllt ist, ist eine derartige Vermischung in einfacher Weise möglich.To push the thrust piston 16 in the direction of the stopper 13, a threaded spindle 17 is used, which projects through the end 7 of the additional container, which is fastened to the bottom of the can, and is guided in a corresponding counter thread. The length of the spindle is measured so that the piston 16 can be guided close to the end 12 of the additional container 6. In this way, the contents of the additional container can be completely dispensed, which is particularly advantageous for pasty masses. In general, however, this is not necessary, since the plug 13 is pressed out after a short advance of the thrust piston 16 by the pressurized liquid in the additional container, so that it can flow out and mix with the contents of the aerosol can. Since the aerosol can is not completely filled anyway for safety reasons, such mixing is possible in a simple manner.

Bei der dargestellten Ausführungsform ragt der Zusatzbehälter vom Boden 4 bis etwa in die Mitte der Aerosoldose 1 und sein zur Aufnahme der Zusatzflüssigkeit zur Verfügung stehender Raum entspricht etwa 5 bis 10% des restlichen Innenraumes der Aerosoldose. Dieses Volumen reicht für die Aufnahme eines Beschleunigers aus, der kurz vor dem Ausgeben des Polyurethanschaum-Vorproduktes mit diesem vermischt wird, um, falls erwünscht, eine schnellere Härtung zu erreichen. Wie eingangs bereits erwähnt, kann die erfindungsgemäße Kombination aus Aerosoldose oder sonstigem Druckbehälter und Zusatzbehälter auch zum Vermischen von anderen aus dem Druckbehälter auszugebenden Flüssigkeiten dienen. Falls es erwünscht ist, den Inhalt des Zusatzbehälters allmählich oder mit Unterbrechungen in die Aerosoldose zu entleeren, kann die mit dem Stopfen 13 bzw. einem sonstigen öffenbaren Verschluß versehene öffnung des Zusatzbehälters auch sehr klein gehalten werden, so daß nach Öffnen des Verschlusses nur der Flüssigkeitsteil aus dem Zusatzbehälter austritt, der beim Vorschub des Schubkolbens 16 durch die entsprechende Volumenverminderung aus dem Zusatzbehälter herausgedrückt wird. In der Regel ist die durch Entfernen des Verschlusses gebildete Öffnung im Zusatzbehälter im Durchmesser in derselben Größenordnung gehalten wie der des Zusatzbehälters.In the embodiment shown, the additional container protrudes from the bottom 4 to approximately the center of the aerosol can 1 and its space available for receiving the additional liquid corresponds to approximately 5 to 10% of the remaining interior space of the aerosol can. This volume is sufficient to accommodate an accelerator, which is mixed with the polyurethane foam pre-product shortly before it is dispensed, in order to achieve faster curing, if desired. As already mentioned at the beginning, the combination of aerosol can or other pressure container and additional container according to the invention can also be used for mixing other liquids to be dispensed from the pressure container. If it is desired to empty the contents of the additional container gradually or with interruptions into the aerosol can, the opening of the additional container provided with the plug 13 or another openable closure can also be kept very small, so that only the liquid part after opening the closure emerges from the additional container, which is pushed out of the additional container when the thrust piston 16 is advanced by the corresponding reduction in volume. As a rule, the opening in the additional container formed by removing the closure is kept in diameter in the same order of magnitude as that of the additional container.

Für die Erfindung können übliche Aerosoldosen verwendet werden, deren Boden bzw. Bodendeckel zum Einführen des Zusatzbehälters geöffnet wird, worauf der Zusatzbehälter abdichtend am Dosenboden befestigt wird. Dadurch wird die aufwendige Bauweise der bekannten Dosenkombinationen vermieden.Conventional aerosol cans can be used for the invention, the bottom or bottom cover of which is opened for the insertion of the additional container, whereupon the additional container is sealingly attached to the can base. This avoids the complex construction of the known can combinations.

Claims (10)

1. Aerosol can for dispensing pressurized liquids, particularly polyurethane foam initial products, with which is associated an additional container (6), which forms an undetachable constructional unit with the aerosol can (1), the inner area of aerosol can (1) and the inner area of additional container (6) being separated from one another by a common wall (18), which can be opened at at least one point, characterized in that the area in the additional container (6) for containing an additional substance can be reduced in an ajustable manner.
2. Can according to claim 1, characterized in that there is at least one detachable closure (13), which is preferably constructed as a cover (13), in the common wall (18).
3. Can according to claims 1 or 2, characterized in that the common wall (18) can be opened by a pressure exerted from the inner area of additional container (6) onto wall (18), particularly onto the detachable closure (13).
4. Can according to one of the preceding claims, characterized in that, in the inoperative state, the pressure prevailing in the additional container (6) is at the most the same and is preferably lower than that in the aerosol can (1).
5. Can according to one of the preceding claims, characterized in that the content of additional container (6) is free from gas propellant.
6. Can according to one of the preceding claims, characterized in that the additional container can be opened by actuating a member (17) arranged outside can (1) and which in particular projects therefrom.
7. Can according to one of the preceding claims, characterized in that the additional container is formed by a pressure cylinder (6), whereof one end (12) is provided with a detachable closure (13) and in which is arranged a plunger (16), displaceable in the direction of closure (13).
8. Can according to claim 7, characterized in that the plunger (16) is movable in the direction of closure (13) in mechanical manner, particularly with the aid of a screw spindle (17).
9. Can according to claims 7 or 8, characterized in that pressure cylinder (16) and preferably its end (17) remote from closure (13), is sealingly fixed to the edge of an opening (8) in a container wall (4, 5) and ram (17) is guided through opening (8) into the pressure cylinder (6).
10. Can according to one of the claims 7 to 9, characterized in that the length of ram (17) is such that closure (13) can be mechanically forced out of pressure cylinder (6) by means of plunger (16).
EP81104394A 1980-06-14 1981-06-06 Aerosol container for dispensing pressurized liquids Expired EP0042128B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81104394T ATE5134T1 (en) 1980-06-14 1981-06-06 AEROSOL CAN FOR DISPENSING PRESSURIZED LIQUIDS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3022389 1980-06-14
DE19803022389 DE3022389A1 (en) 1980-06-14 1980-06-14 AEROSOL CAN OR THE LIKE FOR DISPENSING LIQUID UNDER PRESSURE

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EP0042128A1 EP0042128A1 (en) 1981-12-23
EP0042128B1 true EP0042128B1 (en) 1983-10-26

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DE (2) DE3022389A1 (en)

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DE3161274D1 (en) 1983-12-01
ATE5134T1 (en) 1983-11-15
EP0042128A1 (en) 1981-12-23
DE3022389A1 (en) 1981-12-24

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