EP3741710B1 - Récipient sous pression pourvu de manchon intérieur - Google Patents

Récipient sous pression pourvu de manchon intérieur Download PDF

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Publication number
EP3741710B1
EP3741710B1 EP20174740.9A EP20174740A EP3741710B1 EP 3741710 B1 EP3741710 B1 EP 3741710B1 EP 20174740 A EP20174740 A EP 20174740A EP 3741710 B1 EP3741710 B1 EP 3741710B1
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EP
European Patent Office
Prior art keywords
inner sleeve
pressurised
plunger
base
pressure
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EP20174740.9A
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German (de)
English (en)
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EP3741710A1 (fr
Inventor
István Borhi
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Individual
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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 can with a skirt, a valve arranged in a dome, a base and an inner sleeve arranged on the base, the inner sleeve having a cylindrical sleeve wall, a closure, a base element and a slidably arranged in the inner sleeve and with its end through the bottom element is equipped with a ram that projects, and the bottom element has a guide for the ram and a holding part that is guided through the bottom of the pressure cell and fixed thereto.
  • the plunger interacts with a triggering element arranged outside of the pressure cell.
  • the invention relates in particular to pressurized cans for two-component aerosol systems, such as are used for two-component one-piece foam systems.
  • pressurized cans for two-component aerosol systems, such as are used for two-component one-piece foam systems.
  • such pressure cans have a second component in the inner sleeve, which reacts with the main component to form the finished product, the actual foam or paint.
  • the invention can also be used for other two-component formulations, for example in surface technology and for adhesives.
  • the substances contained in the pressure tanks are usually liquid and consist of a prepolymer, the usual additives and the pressurized propellant gas that is required to discharge the contents from the pressure tank and as a foaming agent.
  • the other component is present in an inner sleeve in a relatively small amount and usually consists of a compound that reacts quickly with the main component, in the case of polyurethane prepolymers with reactive isocyanate groups, for example, of a crosslinking agent in the form of a hydroxy compound or an amine, possibly together with catalysts.
  • the component in the inner sleeve serves to influence the curing and quality of the product, usually to accelerate curing.
  • the second component is introduced into the pressurized can shortly before the contents of the can are dispensed by opening the inner container and shaking it mixed up in it. The finished mixture must then be applied within a defined time to prevent the prepolymer from curing in the can.
  • a pressure can with a one-piece bottom obtained by forming a molded part made of metal, in which the neck of an additional container, which is provided with an external thread, is inserted in a recess and, with the aid of a nut screwed on from the outside, deforming an O-ring seal between a shoulder of the Additional container and the inner edge of the floor recess is braced.
  • the rod which in turn is guided and sealed into the interior of the additional container by a piston-shaped seal, is designed as a shaft which rotates in the additional container neck and is supported on the inside of 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 pressed against the internal pressure into the exterior of the can.
  • the starting point of the invention is the WO 85/00157 A1 , which describes a pressure can for dispensing two-component foaming agents.
  • an additional container accommodating the second component is arranged.
  • the additional container has a cover that can be blasted off via a rod that is guided through the bottom of the pressure can into the interior of the additional container.
  • the rod is movably mounted within the additional container and guided through a seal arranged in the corrugated plate of the can bottom.
  • the pressure can according to WO 85/00157 A1 has proven itself overall and represents a significant improvement compared to the utility model mentioned, but the insertion of the rod is problematic due to the sealing rubber clamped in the bead plate and requires a non-optimal geometry of the rod.
  • the pressure can according to WO 2007/122001 has a flexible membrane for closing the inner sleeve, which is suitable for at least partially absorbing the pressure difference between the can and the inner sleeve.
  • the membrane must be glued or welded.
  • the cover of the inner sleeve of a 2K pressure can is hydraulically blown off.
  • the contents of the inner sleeve are pressurized from the outside with a stamp, with the pressure propagating through the inner sleeve space to the cover and blasting it off.
  • the problem of the pressure difference between the contents of the inner sleeve and the contents of the outer space is solved in that the contents of the outer space can enter the space of the inner sleeve below the plunger and ensure pressure equalization via the plunger.
  • the hardening reactions that occur here on the lid and stamp also lead to adhesion, which - after a certain storage time - makes it difficult or impossible for the lid to be blown off.
  • Other pressurized cans according to the known state of the art are in WO 84/0155 A1 , DE 297 04 521 U1 , WO 2016/120336 A1 and WO 2016/005777 A1 disclosed.
  • the invention is therefore based on the object according to the pressure cell WO 85/00157 A1 further developed in such a way that the parts of the inner sleeve can easily be assembled to form a captive and absolutely tight unit.
  • the sealing problem that occurs between the outside of the pressure cell and the inner sleeve due to the necessary pressure difference is to be mitigated and finally a reliable separation of the closure of the inner sleeve is to be achieved.
  • the pressure cell according to the invention is manufactured more or less conventionally.
  • the pressure can has a frame, a valve arranged in a dome, and a base on which the inner sleeve, which can be released from the outside, is arranged.
  • Such cans are made of tinplate or aluminum; in the case of tin cans, the bottom of the can is crimped onto the body and usually also has a central base plate which accommodates the inner sleeve; in the case of aluminum cans, the body and base are manufactured in one piece, with the inner sleeve being fixed in a central recess in the base.
  • closure side is understood to mean that side of a part which faces the inner container closure.
  • bottom side is that end which points away from the closure side. As a rule, therefore, “bottom” refers to the end of a part that faces the bottom of the can, but only as long as this part or end is inside the pressure can.
  • An essential element for the functionality of the inner sleeve is its equipment with a sealing disk, which - after filling the inner sleeve with the second component under normal pressure - ensures that the interior of the inner sleeve is sealed against the interior of the pressure can, the pressure of which is essentially caused by the filling with intended for the propellant gas is hermetically sealed.
  • the inner sleeve is never filled 100% with the second component and under normal pressure. There is therefore a considerable pressure difference between the can and the case.
  • the sealing disc is an effective blocking element that does not allow pressure equalization.
  • the inner sleeve remains pressureless, which reduces or solves the sealing problems of some conventional cans in the base area.
  • the inner sleeve is closed with a sealing washer, which is clamped or clamped in the area of the inner sleeve on the closure side.
  • the sealing action of the sealing disc occurs through the tension and force exerted against the sleeve wall.
  • the inner sleeve is expediently made of a plastic, such as a polyalkylene, such as polypropylene, a polyamide or also polyoxymethylene (POM), and the sealing disk is made of metal, in particular aluminum or tinplate.
  • the hard metal digs into the relatively soft plastic and thus creates the sealing effect.
  • the sealing disc therefore has sharp edges in particular. No further sealing elements, in particular no O-ring, are required.
  • the sealing washer is designed in the shape of a truncated cone, with the top surface of the truncated cone being able to have a smaller material thickness than the outer surface of the cone.
  • this allows the sealing disk to be pressed in under pressure, the truncated cone inverting and penetrating the softer material of the inner sleeve with its hard edge, slightly widening. The sealing disk is thus clamped in the area of the inner sleeve on the closure side.
  • the sealing washer and the inner sleeve can both be made of metal, provided that the material of the sealing washer is significantly harder than that of the inner sleeve.
  • the sealing disk can be pushed out or blown off with the aid of the plunger against the internal pressure of the can To cause difficulties. In this case, it makes sense to pierce the sealing disk before pressing it out in order to equalize the pressure.
  • a perforation of the sealing disc which leads to a sufficiently large opening, can also be sufficient to bring the contents of the can and the contents of the sleeve into contact with one another.
  • the ram In order to press out the sealing disk, the ram has a crown which acts on the edge area of the sealing disk and is suitable for generating the necessary pressure via the release element and the ram. If a pressure equalization is to be generated beforehand, the crown can have a mandrel in the center, which protrudes beyond the crown and is suitable for closing the sealing disk pierce. When the inner sleeve is released, the sealing disk is first drilled through in the area of the top surface and then pushed out with the crown of the plunger.
  • the inner sleeve expediently has a recess on the inside on the closure side, which leads to the formation of a circumferential step.
  • This step serves as a support for the sealing disc, which can be pressed against the step to close the inner sleeve after the contents of the sleeve have been introduced.
  • the plunger arranged in the inner sleeve is designed essentially in the form of a rod, so that it offers as little resistance as possible to the contents of the inner sleeve when it flows out. It can have lateral guide elements that create a defined distance from the inner sleeve wall, for example in the form of rods or spokes or rings connected to the ram via spokes. It is essential that the ram design does not prevent the contents of the sleeve from escaping into the outside of the pressure cell.
  • the ram is expediently divided into the crown, the star-shaped ram element that is located inside the inner sleeve, and a release pin on the bottom side, which extends into the sleeve base and, if necessary, through it, where it establishes the connection to the release element.
  • a release pin on the bottom side which extends into the sleeve base and, if necessary, through it, where it establishes the connection to the release element.
  • a limiting element is necessary, which is arranged, for example, as an extension on the release pin of the plunger and interacts with a circumferential projection on the inside in the guide of the inner container.
  • the sealing of the inner sleeve in the area of the base element is expediently brought about by the delimiting element having an elastic seal. It can also be designed as a seal overall.
  • the limiting element preferably has sealing lips running around its periphery, which act against the inner surface of the guide. It It goes without saying that the guide has a larger cross-section in the area in which the expansion with the sealing element is effective than in the area that passes through the can bottom and represents the actual guide. The guide is thus extended to the diameter of the limiting element on the closure side.
  • the inner sleeve has a holding part on the bottom side on the bottom element next to the guide.
  • the guide and holding part protrude outwards through the bottom of the can, with the guide having the function of receiving and guiding the plunger and in particular its release pin and the holding part taking over the holding function for the inner sleeve.
  • the holding part surrounds the guide concentrically at least over part of its length. As a rule, the holding part protrudes beyond the guide on the bottom side.
  • the inner sleeve is preferably made of plastic.
  • POM and polypropylene are particularly suitable, but also polyamide qualities, which are more resistant to the aromatic solvents often used in two-component paints.
  • the inner sleeve is fixed to the bottom of the pressure cell.
  • the plunger or the release pin of the plunger protrude through the bottom element of the inner sleeve and, if necessary, out of the bottom of the can.
  • the bottom end of the plunger frictionally engages in the receptacle of a triggering element that can be triggered by hand.
  • the release element is, for example, a release button, which triggers the inner sleeve and releases the contents of the inner sleeve when it is actuated.
  • the holding part of the base element can have a thread on the base side—outside the pressure cell—onto which a wing screw can be screwed as a triggering element.
  • the release element is provided with the receptacle into which the bottom end of the plunger or its release pin protrudes. By screwing in the wing screw, the ram is taken along and pressed into the inner sleeve so that the cutting crown cuts open the sealing film.
  • a pin can be arranged in the release element, which acts on the release pin when the wing screw is screwed in.
  • the inner sleeve is usually fixed to a base plate, which in turn is crimped into the base of the can.
  • a peripheral projection on the holding part behind which the outwardly directed inner edge of the bottom plate engages.
  • the inner sleeve is thus clamped in the base plate, an area of the base element running around the outside and the projection serving as an abutment.
  • sealing lips are provided circumferentially in this supported area, which act against the inside of the base plate.
  • the inner sleeve is clamped in a recess in the pressure can base.
  • the inner sleeve is guided with its holding part through this recess and secured with a holding element, for example a clamping ring, on the underside of the can on the holding part.
  • the holding part can have, for example, a circumferential groove for fixing the clamping ring. The tightness is preferably ensured by a sealing disk between the bottom of the can and the bottom element of the inner sleeve.
  • a fixing element in the area of the bottom of the can, which is used to fix a base but also to guide the release element.
  • a fixing element is, for example, approximately bell-shaped or hemispherical and is anchored, for example, via the aforementioned clamping ring or the like in the area of the recess.
  • the pressurized cell according to the invention can have a base which is used in particular to surround and enclose the triggering element in such a way that unwanted triggering is made more difficult and to increase stability.
  • the base can be attached to the crimped beads or seams.
  • the base is usually attached to the fixing element mentioned above.
  • Fig. 1a shows in cross section a variant of the sealing disk 7 according to the invention with a frustoconical configuration.
  • the truncated cone 7b is closed off by a top surface 7a, with the top surface 7a having a significantly lower material thickness.
  • the sealing disk 7 is expediently made of aluminum and has a thickness of about 1 mm in the jacket area 7b and 0.2 mm in the area of the top surface 7a.
  • Fig. 1b shows the sealing disk 7 in plan view.
  • the crown 13 shows a crown 13 as is suitable for drilling through and pressing out the sealing disk 7 .
  • the crown 13 has a slightly smaller diameter than the inner diameter of the inner sleeve and, in addition to a rod-shaped holding part 13a and guide rods 13b, has a peripheral rim 13c.
  • a central mandrel 13d is matched in size to the top surface of the sealing disc 7 and protrudes beyond the rim 13c.
  • the plunger 9 is actuated, the mandrel 13d pierces the top surface of the sealing disk 7 and thereby equalizes the pressure between the inner sleeve 5 and the interior of the pressure can, after which the crown 13 with the rim 13c releases the sealing disk 7 from its tension and pushes it into the interior of the pressure can .
  • the reference numeral 13e designates a retaining pin which is fitted with a dimensionally matched receptacle of the rod-shaped central part of the plunger 9 (see 3 ) acts together and creates the connection with the plunger 9.
  • FIG. 3 shows the rod-shaped section of the ram 9 with guide rods 9a running perpendicularly thereto and receptacles 9b of the retaining pins 13e arranged at the ends (see 2 ) and the closure-side end of the release pin 10.
  • the guide rods 9a ensure the central position of the plunger 9 in the inner sleeve 5.
  • the illustrated variant of the release pin 10 engages with its closure-side end 10a in one of the receptacles 9b of the plunger 9 and has a peripheral projection 10b as a limiting element, which serves as a limiting element and rests on an internal projection 15 of the guide 16 (see Fig figure 5 ) rests and prevents the trigger pin 10 from being pushed out of the sleeve under the pressure prevailing after the trigger.
  • a sealing element is arranged between the guide 16 and the release pin 10, for example in the form of an O-ring, as well as between the inner sleeve 5 and the can bottom 3.
  • figure 5 shows a suitable inner sleeve 5 with the cylindrical wall 6, the guide part 10 and the holding element 11.
  • the holding element 11 is provided with an external thread which interacts with a release element 12 which is arranged outside the pressure cell.
  • a circumferential annular projection 13 with an undercut 14 is used to fix the inner sleeve 5 on the bottom 3 of the pressure cell 1 (see 6 ).
  • the closure side of the inner sleeve 5 has a circumferential recess 15 on the inside, which leads to the formation of a step 17 .
  • the step 17 serves as a support for the sealing disc 7, which is placed on this step 17 when the inner sleeve 5 is closed and then pressed in. When pressed in, the edge 7c digs into the inner wall of the inner sleeve 5 and ensures a pressure-tight seal.
  • the material has the necessary wall thickness. Accordingly, the end of the inner sleeve 5 on the closure side widens outwards in the area of the recess 17 .
  • FIG. 6 shows a pressure can 1 according to the invention with a dome 2 for the valve and the base 3 with the inner sleeve 5 attached to it.
  • the triggering element 20 in this case provided with a receptacle 21 with an internal thread, which is already partially on the holding element 11 is screwed on.
  • the sealing disc 7 is already arched outwards by the mandrel, but has not yet been released from its anchorage by the crown 13 .
  • the release pin 10 protrudes into the holding element 11 of the inner sleeve 5.
  • the guide 16 of the inner sleeve 5, which merges into the holding element 11, has an inner diameter that corresponds to the diameter of the projection 10b of the release pin 10 corresponds.
  • a projection 15 on the bottom end of the guide 16 limits the movement of the plunger downwards (bottom).
  • a pin 22 which protrudes into the holding element 11 from below, interacts with a screw element 20 which, when screwed onto the external thread of the holding element 11, moves the pin 22 upwards (on the closure side) and thus the inner sleeve 5 via the plunger 9 by breaking off the Sealing disk 7 triggers.

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

Claims (11)

  1. Récipient sous pression (1) pour systèmes d'aérosol à deux composants, en particulier pour système de mousse de montage à deux composants, comportant un corps (2), une soupape disposée dans un dôme, un fond (3) et un manchon intérieur (5) disposé sur le fond (3), le manchon intérieur (5) étant équipé d'une paroi de manchon (6) cylindrique, d'un organe de fermeture (7), d'un élément de fond ainsi que d'un poussoir (9) disposé déplaçable dans le manchon intérieur (5) et dépassant avec son extrémité à travers l'élément de fond et l'élément de fond présentant un guidage (16) pour le poussoir (9) et une partie de retenue (11), qui est guidée à travers le fond (3) du récipient sous pression (1) et fixée sur celui-ci, le poussoir (9) coopérant avec un élément de déclenchement (20) disposé à l'extérieur du récipient sous pression, l'organe de fermeture étant réalisé sous la forme d'un disque d'étanchéité et le manchon intérieur (5) étant fermé côté organe de fermeture par le disque d'étanchéité encastré, que le poussoir (9) peut percer et/ou faire sortir, caractérisé en ce que le disque d'étanchéité (7) est réalisé de forme tronconique et sa surface supérieure (7a) présente une épaisseur de matériau inférieure à celle de la surface latérale (7b).
  2. Récipient sous pression selon la revendication 1, caractérisé en ce que le disque d'étanchéité (7) est constitué de métal, de préférence d'aluminium.
  3. Récipient sous pression selon l'une des revendications précédentes, caractérisé en ce que le manchon intérieur (7) est constitué de matière plastique, de préférence d'un polyalkylène ou polyoxyméthylène.
  4. Récipient sous pression selon l'une des revendications précédentes, caractérisé en ce que le poussoir (9) présente une couronne (13) pour faire sortir le disque d'étanchéité (7) auquel il est relié de manière libérable.
  5. Récipient sous pression selon la revendication 4, caractérisé en ce que la couronne (13) présente en son centre un poinçon (13d), qui dépasse au-dessus de la couronne (13) et est adapté pour percer le disque d'étanchéité (7).
  6. Récipient sous pression selon l'une des revendications précédentes, caractérisé en ce que le manchon intérieur (5) présente, côté organe de fermeture, un épaulement périphérique intérieur, dont la marche (17) sert d'appui pour le disque d'étanchéité (7).
  7. Récipient sous pression selon l'une des revendications précédentes, caractérisé en ce que le poussoir (9) présente, côté fond, une tige de déclenchement (10) avec laquelle il est relié de manière libérable.
  8. Récipient sous pression selon l'une des revendications précédentes, caractérisé en ce que le poussoir (9) est réalisé en forme de barre et présente des guidages latéraux (9b).
  9. Récipient sous pression selon la revendication 7, caractérisé en ce que la tige de déclenchement (10) est guidée dans le guidage (16) et la partie de retenue (11) du manchon intérieur (5).
  10. Récipient sous pression selon l'une des revendications précédentes, caractérisé en ce que la partie de retenue (11) du manchon intérieur (5) coopère, avec son extrémité dépassant à travers le fond (3) du récipient sous pression (1), avec un logement de l'élément de déclenchement (20), de telle manière que, lors de l'actionnement de l'élément de déclenchement (20), une tige (22) montée à l'intérieur du logement de l'élément de déclenchement (20) est déplacée dans la partie de retenue (11) contre la tige de déclenchement (10).
  11. Récipient sous pression selon la revendication 10, caractérisé en ce que l'élément de déclenchement (20) est un élément de vissage doté d'un logement (21) qui présente un filetage intérieur, qui coopère avec un filetage extérieur de la partie de retenue (11).
EP20174740.9A 2019-05-23 2020-05-14 Récipient sous pression pourvu de manchon intérieur Active EP3741710B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019113778.0A DE102019113778A1 (de) 2019-05-23 2019-05-23 Druckdose mit Innenhülse

Publications (2)

Publication Number Publication Date
EP3741710A1 EP3741710A1 (fr) 2020-11-25
EP3741710B1 true EP3741710B1 (fr) 2023-08-23

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DE (1) DE102019113778A1 (fr)
PL (1) PL3741710T3 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8227229U1 (de) * 1982-09-28 1983-01-05 Scholten, Bent Henrik Niels von, 2930 Klampenborg Aerosoldose o dgl zur Ausgabe von unter Druck stehenden Fluessigkeiten
DE3322811C2 (de) 1983-06-24 1996-12-12 Miczka Silvia Behälter, insbesondere Druckdose zum Ausbringen von ein- oder mehrkomponentigen Substanzen
DE29704521U1 (de) * 1997-03-13 1998-07-09 Cocon Arkel B V Zwei-Komponenten-Dose
DE102004024777A1 (de) 2004-05-17 2005-12-15 Fazekas, Gàbor Druckdose mit Innenhülse
DE102006056280A1 (de) 2006-04-25 2007-10-31 Fazekas, Gàbor Druckdose mit Innenhülse
ES2698364T3 (es) * 2014-07-11 2019-02-04 Fazekas Gabor Dispositivo de almacenamiento, recipiente dotado del mismo y procedimiento de fabricación del dispositivo de almacenamiento
ITMI20150015U1 (it) * 2015-01-28 2016-07-28 Polycan Aerosols D O O Bombola aerosol con dispositivo di attivazione a movimentazione unidirezionale

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PL3741710T3 (pl) 2024-02-05
EP3741710A1 (fr) 2020-11-25

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