EP0486630B1 - Method for making a valve assembly, valve assembly, pressure gas package including the valve assembly and method for assembling and filling a pressure gas package - Google Patents

Method for making a valve assembly, valve assembly, pressure gas package including the valve assembly and method for assembling and filling a pressure gas package Download PDF

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Publication number
EP0486630B1
EP0486630B1 EP91909259A EP91909259A EP0486630B1 EP 0486630 B1 EP0486630 B1 EP 0486630B1 EP 91909259 A EP91909259 A EP 91909259A EP 91909259 A EP91909259 A EP 91909259A EP 0486630 B1 EP0486630 B1 EP 0486630B1
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EP
European Patent Office
Prior art keywords
valve
filling bag
compressed gas
filling
region
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EP91909259A
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German (de)
French (fr)
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EP0486630A1 (en
Inventor
Hans Erich Maier
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Hirsch Rolf Dr
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Hirsch Rolf Dr
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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
    • B65D83/60—Contents and propellant separated
    • B65D83/62—Contents and propellant separated by membrane, bag, or the like

Definitions

  • the invention relates to a method for producing a valve unit, the valve unit, a pressurized gas pack comprising the valve unit and a method for assembling and filling the pressurized gas pack, according to the preambles of claims 1, 2, 7 and 8.
  • Compressed gas packs which are often referred to as aerosol containers, are known in which the filling material and the pressure medium are mixed with one another, dissolved in one another and / or dispersed. After actuating the valve, the filling material and the pressure medium emerge together.
  • pressurized gas packs as so-called two-chamber spray systems in order to prevent the contents from coming into contact with the pressurized gas container and / or with the pressurized medium.
  • two-chamber spray systems in order to prevent the contents from coming into contact with the pressurized gas container and / or with the pressurized medium.
  • a metal or glass housing is used as the outer container, as has been used as an aerosol container for decades for filling goods as personal care products, hair care products, insecticides, impregnation sprays and technical aerosols etc.
  • the inner containers which are used to hold the filling material to be dispensed, are filling bags made of flexible material, e.g. thermoplastic or aluminum.
  • the filling bag which is under the excess pressure of the pressure medium, is compressed when the pressure is released, the filling material then being conveyed out of the valve opening of the compressed gas pack by actuating a valve in spray form, as a foam or paste strand.
  • compressed gases such as preferably environmentally compatible compressed air, are used as pressure medium, as are gases condensing under pressure.
  • the filling process takes place in such a way that the filling material is first filled into the empty filling bag previously placed in the pressure gas or pressure medium container, until the filling bag is returned to its original shape and filled with the filling material.
  • valve is put on and the rim of the plate is permanently connected to the pressurized gas container together with the brim-shaped mouth of the filling bag by clinching or crimping.
  • Air bubbles, enclosed in pasty filling material, are quite annoying because they relax spontaneously when the filling material is discharged, which can cause the strand of filling to burst open.
  • the conventional method is particularly complex because the initially unpressurized, closed pressure pack has to be sealed in the region of the second opening mentioned above in order to be subjected to an overpressure inside between the filling bag and the container wall.
  • the desired excess pressure is then generated through this opening with a pressure-increasing medium, such as compressed air or another compressed gas.
  • a pressure-increasing medium such as compressed air or another compressed gas.
  • the opening must be sealed with a plug, as explained above.
  • EP-A-0 179 538 describes a method for producing a valve unit in which, before the valve unit is introduced into an outer housing, a filling bag with its mouth region is brought into firm and sealing contact with the lower surface of a valve plate.
  • the filling bag has a flange surrounding its mouth, the surface of which is brought into contact with the lower surface of the valve disk.
  • the invention has for its object to provide a method for producing a valve unit, which leads to a sealing and adhering system between the underside of the valve plate and the mouth area of the filling bag with fewer components and with a much lower assembly effort.
  • the interior of the filling bag is evacuated by opening the valve element connected to negative pressure, the inner surface of a constriction formed below the mouth region of the filling bag coming into contact with the outer surface of the valve housing.
  • a sealing and adhering system between the underside of the valve plate and the mouth area of the filling bag is thus achieved without further components solely by the fact that the filling bag with its shape in the mouth area adapted to the configuration of the underside of the valve plate firmly evacuates the filling bag against the underside of the valve plate is pressed.
  • a secure positioning of the opening of the filling bag on the underside of the valve plate is achieved in that the filling bag orients itself with respect to the valve disk during the evacuation process due to the interaction between its constriction and the outer surface of the valve housing.
  • the valve unit produced in this way can be stored as such and, if necessary, inserted into a compressed gas pack.
  • the contours in the region of its mouth are adapted to those of the adhesive surface, so that the filling bag is contracted during evacuation, which is also a pneumatic fastening process, and fixed to the adhesive surface.
  • Secure adhesion is achieved in that the shape of the elastic, flexible filling bag, which is to be connected to the adhesive surface by applying a negative pressure, is adapted to the contour of the adhesive surface in the region of the mouth. Due to the configuration of the constriction, the filling bag is oriented with respect to the orientation with respect to the adhesive surface. In addition, this constriction ensures that the mouth region of the filling bag adheres securely to the adhesive surface when it is evacuated. If this possibility for supporting the filling bag on the valve housing was missing, it could occur comparatively frequently that the filling bag contracts in its mouth area when it is evacuated, as a result of which the sealing adhesion of the mouth area of the filling bag to the adhesive surface could be lost.
  • the filling bag By designing the filling bag with longitudinal grooves that are arranged underneath the constriction and that protrude inward and / or bulges that protrude outward, the filling bag becomes due to its nature and shape contracted at the moment of pneumatic fastening and oriented and fixed on the adhesive surface with respect to the shape and orientation according to a predetermined pattern.
  • valve unit the object on which the invention is based is achieved by the features specified in claim 2; here the already mentioned adhesive surface is formed on the plate edge of a seat valve for compressed gas packs.
  • the flexible plastic container - hereinafter referred to simply as a filling bag for the sake of simplicity - is first lightly pressed onto the underside of the valve plate rim.
  • a hollow needle By depressing the spring socket of the valve against the spring force, an open connection between the surroundings and the interior of the elastic filling bag pressed against the corresponding adhesive surface is created by means of a hollow needle, and through this the air contained in the filling bag is evacuated.
  • the combination of valve and filling bag can be viewed as a unit.
  • the valve unit according to the invention consisting of the valve and the elastic filling bag pneumatically attached to it, can be preassembled, stored, transported and manually or mechanically inserted into the mouth of an empty compressed gas container and in a known manner with correspondingly changed values to be permanently connected to it by clinching or crimping. Thanks to the contracted volume and cross-section significantly reduced shape, the valve unit with the filling bag attached to the valve plate can be easily inserted manually or mechanically through the opening of the empty compressed gas pack and then clipped with the same on its rolled edge. Through the formation of the constriction, the filling bag can be precisely aligned and oriented with respect to the valve plate during the evacuation.
  • the filling bag is designed in its shape and profile by bulges and / or by longitudinal grooves so that in the pneumatic fastening process by the negative pressure is an elongated and perpendicular to the axis of the adhesive surface alignment and the bag into a multi-pointed star-shaped strand, a flattened, slightly curved, elongated bladder or another shape that can be predetermined by the shape of the filling bag.
  • the cross section of the filling bag is significantly reduced; the filling bag attached to the valve is formed, for example, when three or more longitudinal grooves are made in the fuselage area as a straight, multi-point star-shaped strand which is oriented perpendicular to the valve disk.
  • the filling bag deforms after applying the negative pressure to an elongated, slightly curved, flattened bladder that can be easily wound together.
  • valve unit designed as a one-piece component considerably simplifies the assembly of the compressed gas pack according to the invention.
  • the object underlying the invention is achieved according to the invention by the features specified in claim 8. Due to the increase in volume of the filling bag filled in the filled pressure gas container, an excess pressure is generated in the space between the inner wall of the pressure gas container and the now extended filling bag, without such an excess pressure, as described in connection with the conventional so-called two-chamber method, by an additional one Opening in the compressed gas container only afterwards should be built.
  • the filling material does not come into contact with the inner wall of the container and can be metered into the filling bag in the pressurized gas container in the absence of air.
  • the procedure proposed according to claim 9 can be used to prevent the filling bag inside the compressed gas container from being subjected to external stresses such as e.g. can occur during transport and handling, can be damaged by striking the inner wall of the compressed gas container.
  • the overpressure available for expelling the filling material is increased by largely filling the interior of the compressed gas container through the filling bag.
  • the molecular structure and physical properties, in particular the permeability can be improved by stretching the flexible, preferably thermoplastic material of the filling bag.
  • diffusion such as occurred over time in known unstretched filling bags, no longer takes place. Due to the expansion of the bag during filling with the filling material, the latter is brought into contact with the bottom of the compressed gas container and / or with its inner wall, which also results in a firmly anchored seat of the filling bag in the compressed gas container.
  • the valve unit 4 shown in FIG. 1, designed as an aerosol valve, has a valve plate 3, a valve element 9 designed as a spring socket, a valve housing 8, which is connected to the valve plate 3 by crimping and in which the spring socket 9 is received, and one Filling bag 2.
  • the filling bag 2 is not yet attached to the valve plate 3.
  • the filling bag 2 consists of a flexible plastic material, preferably of polyethylene, is of the basic shape forth approximately cylindrical and has a convex downwardly curved base region 20 and an adjoining fuselage 19. Above the fuselage 19, a constriction 13 is formed which merges into the fuselage 19 in an extension region 18.
  • the constriction 13 merges into an expanding mouth region 1;
  • the mouth region 1 has, following the constriction 13, initially a radially widening subsection 21, an adjoining, approximately cylindrical middle section 24 and a circumferential and trough-shaped brim 5 adjoining the middle section 24 at the top 19 of the filling bag 2 are formed inward indented longitudinal grooves 14, which extend into the bottom region 20 of the filling bag, and outwardly protruding bulges 22, which extend into the extension region 18 of the filling bag 2.
  • the valve plate 3 is trough-shaped at its plate edge 6.
  • the shape of the lower surface 15 of the valve plate 3 corresponds to the brim 5 of the filling bag 2.
  • a circular sealing lip (not shown) can be arranged at the apex of the brim 5 or at the corresponding location on the lower surface 15 of the trough-shaped plate rim 6, .
  • the filling bag 2 is positioned with respect to the valve plate 3 so that the brim 5 of the filling bag 2 comes into contact with the trough-shaped lower surface 15 of the valve plate 3, possibly with the interposition of the sealing lip mentioned above. With this positioning of the filling bag 2, the inner surface of the constriction 13 of the filling bag 2 comes close to or even in contact with the outer surface of the valve housing 8.
  • the spring socket 9 is now pressed into the valve housing 8 by means of a hollow needle 7; A vacuum is applied to the valve housing 8 from the outside, whereupon the interior 17 of the filling bag 2 is evacuated.
  • the mouth area 1 of the filling bag 2 adheres firmly to the lower surface 15 of the valve plate 3, the brim 5 and the approximately cylindrical central section 24 of the mouth area 1 being pressed firmly against the lower surface 15 of the valve plate 3 due to the effect of the negative pressure.
  • the inner surface of the constriction 13 also comes into firm contact with the outer surface of the valve housing 8, which results in the evacuated filling bag 2 being positioned approximately perpendicular to the valve disk 3. Due to its design with the four longitudinal grooves 14 and the four bulges 22, the cross-sectional shape of the filling bag 2 in the exemplary embodiment shown assumes the shape shown in FIG. 2 below after the evacuation.
  • the filling bag 2 By appropriately shaping the filling bag 2, it can assume any desired shape after the evacuation.
  • the hollow needle 7 After evacuation, i.e. After the interior 17 of the filling bag 2 has been vented, the hollow needle 7 is withdrawn. Due to the spring tension of the spring socket 9, the valve housing 8 is closed automatically. The filling bag 2 adheres firmly with its mouth region 1 to the lower surface 15 of the valve plate 3. A separation is only possible with an enormous pulling force and is therefore very unlikely.
  • valve or valve-bag unit 4 shown in FIG. 2 is thus produced after the evacuation. This can be stored, transported and further handled as a single component.
  • valve-bag unit For installation in a pressurized gas pack, the valve-bag unit is inserted through the opening 16 in an end face of a cylindrical pressurized gas container 10 into the interior of the pressurized gas container 10.
  • the compressed gas container 10 is formed with a rolled edge 11 at the edge region bordering the opening 16. This rolled edge 11 is of its shape ago formed so that it lies flat against the trough designed by the brim 5 or the plate rim 6.
  • an O-ring seal 12 can be inserted at the top of the trough.
  • valve-bag unit 4 After the valve-bag unit 4 has been inserted into the compressed gas container 10, the latter is filled with the compressed gas.
  • the valve-bag unit 4 is raised slightly from the position shown in FIG. 3 with respect to the compressed gas container 10.
  • a space is formed between the outside of the mouth region 1 of the evacuated filling bag 2 adhering to the lower surface 15 of the valve plate 3 and the rolled edge 11 of the compressed gas container 10 surrounding the opening 16.
  • the interior 23 of the compressed gas container 10 is filled with the compressed gas.
  • the valve-bag element 4 is held magnetically, pneumatically and / or mechanically in the position forming the intermediate space.
  • the filling of the compressed gas container 10 with compressed gas is continued until the entire interior 23 of the compressed gas container 10 surrounding the evacuated filling bag 2 is filled with compressed gas.
  • the valve-bag unit 4 is then inserted completely into the compressed gas container 10.
  • the mouth area 1 of the filling bag 2 connected to the valve plate 3 with the brim 5 lies on the rolled edge 11 of the compressed gas container 10.
  • the plate edge 6 of the valve plate 3 is clinched with the rolled edge 11 of the compressed gas container 10.
  • the one inserted between the brim 5 and the rolled edge 11 is inserted An O-ring seal between the underside of the brim and the rolled edge 11.
  • the pressure gas container 10 is filled with pressure medium or gas under a defined overpressure, which can be done by using an overpressure filling head known per se, this defined overpressure is maintained until the valve-bag unit 4 with the evacuated filling bag 2 has been attached or clinched on the compressed gas container 10 in the manner described above. As a result, a defined excess pressure can be presented in the interior 23 of the compressed gas container 10.
  • the overpressure in the interior of the compressed gas container 10 increases by this overpressure in excess of the overpressure generated by the introduction of the liquid or pasty filling material and by the overexpansion of the filling bag.
  • valve-bag unit 4 After the valve-bag unit 4 has been clinched on the pressurized gas container 10 and, if appropriate, after removal of the excess pressure filling head used to create a defined excess pressure, the spring socket 9 accommodated in the valve housing 8 is opened, after which the excess material, which is a Gas, a liquid or pasty good can act, for example by means of a liquid gas filling head known per se, into the previously empty or evacuated filling bag 2. The previously contracted filling bag 2 unfolds until it has returned to its original shape.
  • excess material which is a Gas, a liquid or pasty good
  • the filling bag 2 is overstretched with the gaseous, liquid or pasty filling material beyond the original shape of the filling bag 2.
  • the filling or overstretching of the filling bag 2 is continued until the outer surface of the filling bag largely lies against the inner surface of the compressed gas container 10.

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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)
  • Packages (AREA)
  • Vacuum Packaging (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Check Valves (AREA)

Abstract

The invention pertains to a liner made of elastic, deformable, flexible material. By the special design of the contours in the area of its opening, shoulder, sides, and its bottom, the liner is intended to be so firmly attached to a top, that the assembled components can be handled, stored, and transported as a single unit. The liner, by its quality and form is, by vacuum, completely contracted in the moment of its pneumatic attachment and will be fixed at the top and oriented to its intended resulting shape and direction. Such a liner is used in connection with the manufacturing of a valve liner unit which is intended to be used in a pressurized container. With this valve liner unit, it is possible to easily manufacture a pressurized container by a method according to which the container is first pre-pressurized with compressed air or other compressed gases, while the filling goods make no contact with the inner walls of the container and whereby it is not necessary to create an additional opening to the container instead of the one opening for inserting the valve liner unit. The filling goods can be introduced into the pre-pressurized container according to this method without contact with environmental air.

Description

Die Erfindung bezieht sich auf ein Verfahren zur Herstellung einer Ventileinheit, die Ventileinheit, eine die Ventileinheit aufweisende Druckgaspackung und ein Verfahren zur Montage und Füllung der Druckgaspackung, nach der Oberbegriffen der Patentansprüche 1, 2, 7 und 8.The invention relates to a method for producing a valve unit, the valve unit, a pressurized gas pack comprising the valve unit and a method for assembling and filling the pressurized gas pack, according to the preambles of claims 1, 2, 7 and 8.

Es sind Druckgaspackungen, welche vielfach als Aerosolgebinde bezeichnet sind, bekannt, bei denen das Füllgut und das Druckmittel miteinander vermischt, ineinander gelöst und/oder dispergiert sind. Nach Betätigen des Ventils treten das Füllgut und das Druckmittel gemeinsam aus.Compressed gas packs, which are often referred to as aerosol containers, are known in which the filling material and the pressure medium are mixed with one another, dissolved in one another and / or dispersed. After actuating the valve, the filling material and the pressure medium emerge together.

Weiterhin ist es bekannt, die Druckgaspackungen als sog. Zweikammer-Sprühsysteme auszuführen, um zu vermeiden, daß das Füllgut mit dem Druckgasbehälter und/oder mit dem Druckmittel in Berührung gelangt. Auf diese Weise ist es möglich, aggressive und pastöse Füllgüter in Metallgehäusen, z.B. Weißblechdosen, abzufüllen und aus diesen auszusprühen, auszuschäumen oder auszuquetschen, ohne daß eine Vermischung mit dem Druckmittel erfolgt.Furthermore, it is known to design the pressurized gas packs as so-called two-chamber spray systems in order to prevent the contents from coming into contact with the pressurized gas container and / or with the pressurized medium. In this way it is possible to fill aggressive and pasty filling goods in metal housings, for example tin cans, and to spray, foam or squeeze them out, without mixing with the pressure medium.

Bei den Zweikammer-Sprühsystemen findet als Außenbehälter ein Metall- oder Glasgehäuse Verwendung, wie sie als Aerosolgebinde seit Jahrzehnten zur Abfüllung von Gütern als Körperpflegemittel, Haarpflegemittel, Insektizide, Imprägniersprays und technische Aerosole usw. eingesetzt werden. Die Innenbehälter, die zur Aufnahme des auszubringenden Füllgutes dienen, sind Füllbeutel aus flexiblem Material, wie Z.B. thermoplastischem Kunststoff oder Aluminium. Der Füllbeutel, der unter dem Überdruck des Druckmittels steht, wird bei Druckentlastung zusammengedrückt, wobei das Füllgut dann durch Betätigen eines Ventils in Sprühform, als Schaum oder Pastenstrang aus der Ventilöffnung der Druckgaspackung herausgefördert wird.In the two-chamber spray systems, a metal or glass housing is used as the outer container, as has been used as an aerosol container for decades for filling goods as personal care products, hair care products, insecticides, impregnation sprays and technical aerosols etc. The inner containers, which are used to hold the filling material to be dispensed, are filling bags made of flexible material, e.g. thermoplastic or aluminum. The filling bag, which is under the excess pressure of the pressure medium, is compressed when the pressure is released, the filling material then being conveyed out of the valve opening of the compressed gas pack by actuating a valve in spray form, as a foam or paste strand.

Als Druckmittel finden alle Arten von komprimierten Gasen, wie vorzugsweise auch umweltgerechte Druckluft, Verwendung, ebenso wie unter Druck kondensierende Gase.All types of compressed gases, such as preferably environmentally compatible compressed air, are used as pressure medium, as are gases condensing under pressure.

Allen diesen bekannten Zweikammer-Sprühsystemen ist der Nachteil gemeinsam, daß sich in einem druckfesten Druckgasbehälter an dessen Boden oder in einem anderen Bereich eine Öffnung befindet. Der flexible Füllbeutel wird an dem Rand einer im Druckgasbehälter vorgesehenen Mündung beim Verschließvorgang durch Einquetschung aufgehängt. Um Raum für die Wandstärke des Füllbeutels zu gewinnen, wird die an den Aerosolgebinden standardmäßig vorhandene Mündung aufgeweitet. Durch die dennoch vergleichsweise enge Öffnung des Druckgas- bzw. Druckmittelbehälters muß der einen vergleichsweise größeren Querschnitt aufweisende Füllbeutel unter zwangsläufiger, zeitweiliger Verformung in den Druckgas- bzw. Druckmittelbehälter eingeführt werden. Hierbei kann es zu Beschädigungen des Füllbeutels kommen, aufgrund deren eine ungewollte Vermischung des Füllguts mit dem Druckmittel auftreten kann.All these known two-chamber spray systems have the disadvantage in common that there is an opening in a pressure-resistant pressure gas container at the bottom or in another area. The flexible filling bag is suspended on the edge of a mouth provided in the pressurized gas container by squeezing during the closing process. In order to gain space for the wall thickness of the filling bag, the mouth that is standard on the aerosol containers is widened. Due to the comparatively narrow opening of the pressurized gas or pressure medium container, the filling bag, which has a comparatively larger cross section, must be temporary deformation are introduced into the pressure gas or pressure medium container. This can result in damage to the filling bag, due to which an undesired mixing of the filling material with the pressure medium can occur.

Der Abfüllvorgang geschieht in der Weise, daß zunächst das Füllgut in den zuvor in den Druckgas- bzw. Druckmittelbehälter eingebrachten leeren Füllbeutel eingefüllt wird, bis der Füllbeutel wieder in seine ursprüngliche Gestalt zurückversetzt und mit dem Füllgut gefüllt ist.The filling process takes place in such a way that the filling material is first filled into the empty filling bag previously placed in the pressure gas or pressure medium container, until the filling bag is returned to its original shape and filled with the filling material.

In einem weiteren, getrennten Arbeitsgang wird das Ventil aufgesetzt und dessen Tellerrand zusammen mit der krempenförmig ausgebildeten Mündung des Füllbeutels durch Verclinchung oder Vercrimpung mit dem Druckgasbehälter dauerhaft verbunden.In a further, separate working step, the valve is put on and the rim of the plate is permanently connected to the pressurized gas container together with the brim-shaped mouth of the filling bag by clinching or crimping.

Die Befüllung des Druckgas- bzw. Druckmittelbehälters der herkömmlichen Zweikammer-Systeme mit Druckmittel bedingt eine aufwendige Technologie, weil am Boden der Behälter oder im das Ventil umgebenden Bereich der Behälter zunächst eine Öffnung ausgebildet werden muß. Mit einer speziellen Vorrichtung wird durch diese Öffnung das Druckmittel eingebracht. Danach wird die Öffnung mit einem elastischen Stopfen verschlossen. Nunmehr wird auf das Ventilgehäuse der zur manuellen Betätigung erforderliche Sprühkopf oder Pastenstrangkopf aufgesetzt. Bei Betätigen des Ventilkopfes strömt das Füllgut unter der Einwirkung des den Füllbeutel beaufschlagenden Druckmittels aus der Druckgaspackung aus.Filling the pressure gas or pressure medium container of the conventional two-chamber systems with pressure medium requires a complex technology because an opening must first be formed on the bottom of the container or in the region of the container surrounding the valve. The pressure medium is introduced through this opening with a special device. Then the opening is closed with an elastic stopper. Now the spray head or paste strand head required for manual actuation is placed on the valve housing. When the valve head is actuated, the product flows under the action of the pressure medium acting on the filling bag from the compressed gas pack.

Mit der Erkenntnis, daß die in Aerosolgebinden bis vor kurzem in der Regel enthaltenen Treibmittel, nämlich Fluorchlorkohlenwasserstoffe, die Ozonhülle der Erde beschädigen, wächst das Interesse, diese Treibmittel durch weniger gefährliche kondensierbare Gase zu ersetzen oder auf solche Druckmittel überhaupt zu verzichten. Die Zweikammer-Sprühsysteme, bei denen Druckluft als Druckmittel und damit als Treibmittel verwendet wird, bieten eine gute Alternative. Allerdings weist dieses Zweikammer-System verschiedene Nachteile auf. Der in die Öffnung eingesetzte elastische Stopfen führt bei längeren Standzeiten infolge mangelhafter Abdichtung wegen unregelmässiger Ausbildung der Öffnung und/oder Ermüdung des Materials zu Druckverlust, durch welchen die Funktionsfähigkeit dieser Gebinde eingeschränkt, wenn nicht gar zunichte gemacht wird. Das Aufweiten der serienmäßigen Öffnung sowie das Einbringen der Öffnung bei den Blechdosen geschieht in der Regel mechanisch und in mehr oder weniger unkontrollierter Weise, so daß unregelmäßige Verformungen bei der Aufweitung bzw. bei der Lochung nicht zu vermeiden sind. Außerdem entsprechen solchermaßen bearbeitete Druckbehälter nicht mehr der ursprünglich von der Behörde dem Dosenhersteller hinsichtlich des Baumusters erteilten Zulassung. Darüber hinaus erweist sich der Füllprozeß dieser Gebinde als zeitraubend, umständlich und kostspielig.With the realization that until recently the propellants usually contained in aerosol containers, namely chlorofluorocarbons, damage the earth's ozone layer, there is growing interest in replacing these propellants with less dangerous condensable gases or in doing without such pressure medium at all. The two-chamber spray systems, in which compressed air is used as pressure medium and thus as a propellant, offer a good alternative. However, this two-chamber system has several disadvantages. The elastic stopper inserted into the opening leads to a loss of pressure in the event of longer standing times due to inadequate sealing due to irregular formation of the opening and / or fatigue of the material, as a result of which the functionality of these containers is restricted, if not destroyed. The widening of the standard opening as well as the introduction of the opening in the tin cans is usually done mechanically and in a more or less uncontrolled manner, so that irregular deformations during expansion or perforation cannot be avoided. In addition, pressure vessels processed in this way no longer correspond to the type approval originally granted by the authority to the can manufacturer. In addition, the filling process of these containers proves to be time-consuming, cumbersome and costly.

Insbesondere bei pastösem Füllgut ist das Einschleppen von Luftblasen unvermeidlich. Luftblasen, in pastösem Füllgut eingeschlossen, sind deswegen recht lästig, weil sie sich beim Ausbringen des Füllguts spontan entspannen, wodurch es zum partiellen Aufplatzen des Füllgutstrangs kommen kann.Carrying air bubbles is unavoidable, especially with pasty contents. Air bubbles, enclosed in pasty filling material, are quite annoying because they relax spontaneously when the filling material is discharged, which can cause the strand of filling to burst open.

Besonders aufwendig ist das herkömmliche Verfahren, weil anschließend die zunächst drucklose, verschlossene Druckpackung zwecks Beaufschlagung mit einem Überdruck im Inneren zwischen Füllbeutel und Behälterwand im Bereich der zweiten, oben bereits erwähnten Öffnung abgedichtet werden muß.The conventional method is particularly complex because the initially unpressurized, closed pressure pack has to be sealed in the region of the second opening mentioned above in order to be subjected to an overpressure inside between the filling bag and the container wall.

Durch diese Öffnung wird dann der gewünschte Überdruck mit einem druckerhöhenden Medium, wie Preßluft oder einem anderen Druckgas, erzeugt.The desired excess pressure is then generated through this opening with a pressure-increasing medium, such as compressed air or another compressed gas.

Unter Beibehaltung des Drucks im Inneren der Packung muß die Öffnung schließlich, wie oben erläutert, durch einen Stopfen abgedichtet werden.Finally, while maintaining the pressure inside the package, the opening must be sealed with a plug, as explained above.

Die Beständigkeit der Abdichtung ist erfahrungsgemäß bei dem oben beschriebenen, herkömmlichen Zweikammer-Verfahren nicht immer gewährleistet.Experience has shown that the resistance of the seal is not always guaranteed with the conventional two-chamber process described above.

Aus der US-A-3 606 089 ist es bekannt, zunächst den Füllbeutel mit dem einzufüllenden Gut zu füllen und danach den Füllbeutel mit einer Verschlußklappe zu schließen.From US-A-3 606 089 it is known to first fill the filling bag with the goods to be filled in and then to close the filling bag with a closure flap.

In der EP-A-0 179 538 ist ein Verfahren zum Herstellen einer Ventileinheit beschrieben, bei dem vor Einbringen der Ventileinheit in ein Außengehäuse ein Füllbeutel mit seinem Mündungsbereich in feste und abdichtende Anlage an die Unterfläche eines Ventiltellers gebracht wird. Hierzu weist der Füllbeutel einen seine Mündung umgebenden Flansch auf, der mit seiner Oberfläche in Anlage an die Unterfläche des Ventiltellers gebracht wird. Nachdem diese Anlage zwischen dem Flansch des Füllbeutels und dem Ventilteller hergestellt ist, wird ein Haltering von unten her mit der Oberfläche eines an ihm vorgesehenen Flansches in Anlage an die Unterfläche des Flansches des Füllbeutels gebracht. Danach wird von oben ein unten offenes, zylindrisches Teil mit seinem Mantel über den Ventilteller, den Flansch des Füllbeutels und den Flansch des Halterings geschoben, bis die obere Stirnwand eines zylindrischen Körpers gegen die Oberseite des Ventiltellers anliegt. In diesem Zustand steht die Mantelwand des zylindrischen Körpers mit ihrem freien Ende über die Unterseite des Flansches des Halterings über. Dieser überstehende Bereich der zylindrischen Mantelwand des zylindrischen Körpers wird zwecks Fixierung der genannten Teile aneinander nach innen gebogen. Hierdurch wird eine feste, abdichtende und anhaftende Anlage zwischen der Unterfläche des Ventiltellers und der Oberfläche des die Mündung des Füllbeutels umgebenden Flansches gewährleistet.EP-A-0 179 538 describes a method for producing a valve unit in which, before the valve unit is introduced into an outer housing, a filling bag with its mouth region is brought into firm and sealing contact with the lower surface of a valve plate. For this purpose, the filling bag has a flange surrounding its mouth, the surface of which is brought into contact with the lower surface of the valve disk. After this system has been produced between the flange of the filling bag and the valve plate, a retaining ring is brought into contact with the surface of a flange provided on it from below from below on the lower surface of the flange of the filling bag. Then a cylindrical part with its jacket open at the bottom is pushed over the valve plate, the flange of the filling bag and the flange of the retaining ring until the upper end wall of a cylindrical body lies against the top of the valve plate. In this state, the outer wall of the cylindrical body projects with its free end over the underside of the flange of the retaining ring. This projecting region of the cylindrical jacket wall of the cylindrical body is bent inwards for the purpose of fixing the parts mentioned to one another. This ensures a firm, sealing and adherent contact between the lower surface of the valve plate and the surface of the flange surrounding the mouth of the filling bag.

Bei dem bekannten Verfahren sind zur Herstellung des festen Verbunds zwischen dem Füllbeutel und dem Ventilteller bzw. dem Ventilelement eine Vielzahl von Bauteilen erforderlich. Des weiteren ergibt sich ein nicht unbeträchtlicher Montageaufwand, bei dem sogar ein Bauteil verformt werden muß.In the known method for producing the firm bond between the filling bag and the valve plate or the valve element requires a large number of components. Furthermore, there is a not inconsiderable assembly effort, in which even a component has to be deformed.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Herstellen einer Ventileinheit zu schaffen, welches mit weniger Bauteilen und mit einem weitaus geringeren Montageaufwand zu einer abdichtenden und anhaftenden Anlage zwischen der Unterseite des Ventiltellers und dem Mündungsbereich des Füllbeutels führt.The invention has for its object to provide a method for producing a valve unit, which leads to a sealing and adhering system between the underside of the valve plate and the mouth area of the filling bag with fewer components and with a much lower assembly effort.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale im kennzeichnenden Teil des Patentanspruchs 1 gelöst.This object is achieved by the features in the characterizing part of patent claim 1.

Zur Herstellung der haftenden und abdichtenden Anlage wird der Innenraum des Füllbeutels durch Öffnen des an Unterdruck angeschlossenen Ventilelements evakuiert, wobei die Innenfläche einer unterhalb des Mündungsbereichs des Füllbeutels ausgebildeten Einschnürung in Anlage an die Außenfläche des Ventilgehäuses gerät. Erfindungsgemäß wird somit ohne weitere Bauteile eine abdichtende und anhaftende Anlage zwischen der Unterseite des Ventiltellers und dem Mündungsbereich des Füllbeutels allein dadurch erzielt, daß der Füllbeutel mit seiner im Mündungsbereich an die Konfiguration der Unterseite des Ventiltellers angepaßten Formgebung bei der Evakuierung des Füllbeutels fest gegen die Unterseite des Ventiltellers gepreßt wird. Eine sichere Positionierung der Mündungsöffnung des Füllbeutels an der Unterseite des Ventiltellers wird erzielt, indem der Füllbeutel sich beim Evakuierungsvorgang aufgrund des Zusammenwirkens zwischen seiner Einschnürung und der Außenfläche des Ventilgehäuses in bezug auf den Ventilteller ausrichtet. Die so hergestellte Ventileinheit kann als solche zwischengelagert und bei Bedarf in eine Druckgaspackung eingeführt werden. Bei dem verwendeten Füllbeutel sind die Konturen im Bereich seiner Mündung an diejenigen der Haftfläche angepaßt, so daß der FÜllbeutel bei der Evakuierung, die zugleich ein pneumatischer Befestigungsvorgang ist, in sich zusammengezogen und an der Haftfläche fixiert wird. Die sichere Haftung wird dadurch erreicht, daß im Bereich der Mündung die Form des elastischen, flexiblen Füllbeutels, welcher mit der Haftfläche durch Anlegen eines Unterdrucks verbunden werden soll, der Kontur der Haftfläche angepaßt ist. Durch die Ausgestaltung der Einschnürung wird der Füllbeutel hinsichtlich der Ausrichtung in bezug auf die Haftfläche orientiert. Darüberhinaus wird durch diese Einschnürung gewährleistet, daß der Mündungsbereich des Füllbeutels bei einer Evakuierung desselben sicher an der Haftfläche anhaftet. Fehlte diese Möglichkeit zur Abstützung des Füllbeutels am Ventilgehäuse, könnte es vergleichsweise häufig vorkommen, daß sich der Füllbeutel bei seiner Evakuierung in seinem Mündungsbereich zusammenzieht, wodurch die abdichtende Haftung des Mündungsbereichs des Füllbeutels an der Haftfläche verloren gehen könnte. Durch eine Ausgestaltung des Füllbeutels mit unterhalb der Einschnürung angeordneten, nach innen eingebuchteten Längsnuten und/oder nach außen vorstehenden Ausbuchtungen wird der Füllbeutel infolge seiner Beschaffenheit und Gestalt im Augenblick der pneumatischen Befestigung zusammengezogen und an der Haftfläche hinsichtlich der Gestalt und der Ausrichtung nach vorgegebenem Muster orientiert und fixiert.To produce the adhesive and sealing system, the interior of the filling bag is evacuated by opening the valve element connected to negative pressure, the inner surface of a constriction formed below the mouth region of the filling bag coming into contact with the outer surface of the valve housing. According to the invention, a sealing and adhering system between the underside of the valve plate and the mouth area of the filling bag is thus achieved without further components solely by the fact that the filling bag with its shape in the mouth area adapted to the configuration of the underside of the valve plate firmly evacuates the filling bag against the underside of the valve plate is pressed. A secure positioning of the opening of the filling bag on the underside of the valve plate is achieved in that the filling bag orients itself with respect to the valve disk during the evacuation process due to the interaction between its constriction and the outer surface of the valve housing. The valve unit produced in this way can be stored as such and, if necessary, inserted into a compressed gas pack. In the case of the filling bag used, the contours in the region of its mouth are adapted to those of the adhesive surface, so that the filling bag is contracted during evacuation, which is also a pneumatic fastening process, and fixed to the adhesive surface. Secure adhesion is achieved in that the shape of the elastic, flexible filling bag, which is to be connected to the adhesive surface by applying a negative pressure, is adapted to the contour of the adhesive surface in the region of the mouth. Due to the configuration of the constriction, the filling bag is oriented with respect to the orientation with respect to the adhesive surface. In addition, this constriction ensures that the mouth region of the filling bag adheres securely to the adhesive surface when it is evacuated. If this possibility for supporting the filling bag on the valve housing was missing, it could occur comparatively frequently that the filling bag contracts in its mouth area when it is evacuated, as a result of which the sealing adhesion of the mouth area of the filling bag to the adhesive surface could be lost. By designing the filling bag with longitudinal grooves that are arranged underneath the constriction and that protrude inward and / or bulges that protrude outward, the filling bag becomes due to its nature and shape contracted at the moment of pneumatic fastening and oriented and fixed on the adhesive surface with respect to the shape and orientation according to a predetermined pattern.

Hinsichtlich der Ventileinheit wird die der Erfindung zugrundeliegende Aufgabe durch die im Anspruch 2 angegebenen Merkmale gelöst; hierbei ist die bereits erwähnte Haftfläche am Tellerrand eines Sitzventils für Druckgaspackungen ausgebildet. Der flexible Kunststoffbehälter - der Einfachheit halber nachfolgend kurz als Füllbeutel bezeichnet - wird an die Unterseite des Ventiltellerrands zunächst leicht angedrückt. Durch Niederdrücken der Federpfanne des Ventils gegen die Federkraft wird mittels einer Hohlnadel eine offene Verbindung zwischen Umfeld und dem Inneren des an die entsprechende Haftfläche angedrückten elastischen Füllbeutels geschaffen und durch diese die im Füllbeutel enthaltene Luft evakuiert. Die Kombination aus Ventil und Füllbeutel kann als Einheit betrachtet werden. Wie herkömmliche Aerosolventil-Kombinationen, bestehend aus Ventil und eingeschobenem oder aufgesetztem Steigrohr, kann die erfindungsgemäße Ventileinheit bestehend aus dem Ventil und dem daran pneumatisch befestigten, elastischen Füllbeutel, vormontiert, gelagert, transportiert und manuell oder maschinell in die Mündung eines leeren Druckgasbehälters eingebracht werden und in bekannter Weise mit entsprechend veränderten Werten mit diesem durch Verclinchung oder Vercrimpung dauerhaft verbunden werden. Dank der zusammengezogenen, in Volumen und Querschnitt wesentlich verringerten Gestalt kann die Ventileinheit mit dem am Ventilteller befestigten Füllbeutel mühelos manuell oder maschinell durch die Öffnung der leeren Druckgaspackung in dieselbe eingelegt und anschließend mit derselben an deren Rollrand verclincht werden. Durch die Ausbildung der Einschnürung kann der Füllbeutel in bezug auf den Ventilteller bei der Evakuierung exakt ausgerichtet und orientiert werden.With regard to the valve unit, the object on which the invention is based is achieved by the features specified in claim 2; here the already mentioned adhesive surface is formed on the plate edge of a seat valve for compressed gas packs. The flexible plastic container - hereinafter referred to simply as a filling bag for the sake of simplicity - is first lightly pressed onto the underside of the valve plate rim. By depressing the spring socket of the valve against the spring force, an open connection between the surroundings and the interior of the elastic filling bag pressed against the corresponding adhesive surface is created by means of a hollow needle, and through this the air contained in the filling bag is evacuated. The combination of valve and filling bag can be viewed as a unit. Like conventional aerosol valve combinations, consisting of a valve and an inserted or attached riser pipe, the valve unit according to the invention, consisting of the valve and the elastic filling bag pneumatically attached to it, can be preassembled, stored, transported and manually or mechanically inserted into the mouth of an empty compressed gas container and in a known manner with correspondingly changed values to be permanently connected to it by clinching or crimping. Thanks to the contracted volume and cross-section significantly reduced shape, the valve unit with the filling bag attached to the valve plate can be easily inserted manually or mechanically through the opening of the empty compressed gas pack and then clipped with the same on its rolled edge. Through the formation of the constriction, the filling bag can be precisely aligned and oriented with respect to the valve plate during the evacuation.

Gemäß Anspruch 3 ist der Füllbeutel in seiner Form und seinem Profil durch Ausbuchtungen und/oder durch Längsnuten so gestaltet, daß bei dem pneumatischen Befestigungsprozeß durch den Unterdruck eine gestreckte und senkrecht zur Achse der Haftfläche stehende Ausrichtung erfolgt und der Beutel zu einem mehrzackig sternförmigen Strang, einer plattgedrückten, leicht gekrümmten, längsgestreckten Blase oder einer anderen, durch die Formung des Füllbeutels vorgebbaren Gestalt zusammengezogen wird. Der Querschnitt des Füllbeutels wird dabei wesentlich verringert; der am Ventil angebrachte Füllbeutel wird beispielsweise bei Anbringung von drei oder mehr Längsnuten im Rumpfbereich als geradlinig gestreckter, mehrzackig sternförmiger Strang ausgebildet, der senkrecht zum Ventilteller ausgerichtet ist.According to claim 3, the filling bag is designed in its shape and profile by bulges and / or by longitudinal grooves so that in the pneumatic fastening process by the negative pressure is an elongated and perpendicular to the axis of the adhesive surface alignment and the bag into a multi-pointed star-shaped strand, a flattened, slightly curved, elongated bladder or another shape that can be predetermined by the shape of the filling bag. The cross section of the filling bag is significantly reduced; the filling bag attached to the valve is formed, for example, when three or more longitudinal grooves are made in the fuselage area as a straight, multi-point star-shaped strand which is oriented perpendicular to the valve disk.

Sind gemäß Anspruch 4 am Beutel lediglich zwei Längsnuten an gegenüberliegenden Seiten angebracht, verformt sich der Füllbeutel nach Anlegen des Unterdrucks zu einer längsgestreckten, leicht gekrümmten, plattgedrückten Blase, die unschwer zusammengewickelt werden kann.Are only two longitudinal grooves attached to opposite sides of the bag, the filling bag deforms after applying the negative pressure to an elongated, slightly curved, flattened bladder that can be easily wound together.

Gemäß Anspruch 5 wird eine besonders feste Anhaftung des Mündungsbereichs des Füllbeutels am Tellerrand des Ventiltellers erreicht.According to claim 5, a particularly firm adhesion of the mouth region of the filling bag is achieved on the plate edge of the valve plate.

Die Dichtigkeitseigenschaften der Verbindung zwischen dem Ventilteller und dem Füllbeutel können durch die gemäß Anspruch 6 vorgeschlagenen Merkmale erheblich verbessert werden.The sealing properties of the connection between the valve plate and the filling bag can be considerably improved by the features proposed according to claim 6.

Hinsichtlich der Druckgaspackung wird die der Erfindung zugrundeliegende Aufgabe durch die im Anspruch 7 vorgeschlagenen Merkmale gelöst. Durch die als einteiliges Bauteil ausgestaltete Ventileinheit wird eine erhebliche Vereinfachung der Montage der erfindungsgemäßen Druckgaspackung erreicht.With regard to the compressed gas pack, the object on which the invention is based is achieved by the features proposed in claim 7. The valve unit designed as a one-piece component considerably simplifies the assembly of the compressed gas pack according to the invention.

Hinsichtlich des Verfahrens zur Montage und Füllung einer Druckgaspackung wird die der Erfindung zugrundeliegende Aufgabe erfindungsgemäß durch die im Anspruch 8 angegebenen Merkmale gelöst. Durch die Volumenvergrößerung des im gefüllten Druckgasbehälter seinerseits gefüllten Füllbeutels wird im Zwischenraum zwischen der Innenwand des Druckgasbehälters und dem nunmehr ausgedehnten Füllbeutel ein Überdruck erzeugt, ohne daß ein solcher Überdruck, wie im Zusammenhang mit den herkömmlichen, sog. Zweikammer-Verfahren beschrieben, durch eine zusätzliche Öffnung im Druckgasbehälter erst im nachhinein aufgebaut werden müßte. Das Füllgut kommt nicht mit der Innenwandung des Behälters in Berührung und kann unter Luftabschluß in den im Druckgasbehälter befindlichen Füllbeutel eindosiert werden.With regard to the method for assembling and filling a compressed gas pack, the object underlying the invention is achieved according to the invention by the features specified in claim 8. Due to the increase in volume of the filling bag filled in the filled pressure gas container, an excess pressure is generated in the space between the inner wall of the pressure gas container and the now extended filling bag, without such an excess pressure, as described in connection with the conventional so-called two-chamber method, by an additional one Opening in the compressed gas container only afterwards should be built. The filling material does not come into contact with the inner wall of the container and can be metered into the filling bag in the pressurized gas container in the absence of air.

Durch die gemäß Anspruch 9 vorgeschlagene Vorgehensweise kann verhindert werden, daß der Füllbeutel innerhalb des Druckgasbehälters bei äußeren Beanspruchungen des letzteren, wie sie z.B. beim Transport und Umschlag auftreten können, durch Anschlagen an die Innenwand des Druckgasbehälters beschädigt werden kann. Darüber hinaus wird durch weitgehende Ausfüllung des Innenraums des Druckgasbehälters durch den Füllbeutel der zum Austreiben des Füllguts zur Verfügung stehende Überdruck erhöht.The procedure proposed according to claim 9 can be used to prevent the filling bag inside the compressed gas container from being subjected to external stresses such as e.g. can occur during transport and handling, can be damaged by striking the inner wall of the compressed gas container. In addition, the overpressure available for expelling the filling material is increased by largely filling the interior of the compressed gas container through the filling bag.

Durch die gemäß Anspruch 10 vorgeschlagene Vorgehensweise können durch Recken des flexiblen, vorzugsweise thermoplastischen Materials des Füllbeutels dessen Molekularstruktur sowie physikalischen Eigenschaften, insbesondere die Permeabilität, verbessert werden. Überraschenderweise wurde herausgefunden, daß eine Diffusion, wie sie bei bekannten ungereckten Füllbeuteln im Laufe der Zeit eintrat, nicht mehr erfolgt. Durch die Ausdehnung des Beutels während der Befüllung mit Füllgut wird dieser zur Berührung mit dem Boden des Druckgasbehälters und/oder mit dessen Innenwandung gebracht, wodurch sich zudem ein fest verankerter Sitz des Füllbeutels im Druckgasbehälter ergibt.By means of the procedure proposed according to claim 10, the molecular structure and physical properties, in particular the permeability, can be improved by stretching the flexible, preferably thermoplastic material of the filling bag. Surprisingly, it was found that diffusion, such as occurred over time in known unstretched filling bags, no longer takes place. Due to the expansion of the bag during filling with the filling material, the latter is brought into contact with the bottom of the compressed gas container and / or with its inner wall, which also results in a firmly anchored seat of the filling bag in the compressed gas container.

Durch die Vorgehensweise gemäß Anspruch 11 kann der zum Austreiben des Füllguts aus der Druckgaspackung zur Verfügung stehende Überdruck weiter erhöht werden.Through the procedure according to claim 11, the excess pressure available for expelling the filling material from the compressed gas pack can be increased further.

Im folgenden wird die Erfindung an Hand von Ausführungsformen unter Bezugnahme auf die Zeichnung näher erläutert. Es zeigen:

Figur 1
eine Seiten- und Unteransicht eines an einem Ventilteller befestigbaren Füllbeutels;
Figur 2
eine Ventileinheit aus Ventilteller, Gehäuse, Element und Füllbeutel;
Figur 3
die in einen Druckgasbehälter eingesetzte Ventileinheit und
Figur 4
die in den Druckgasbehälter eingesetzte Ventileinheit, wobei der Füllbeutel gefüllt ist.
In the following the invention is explained in more detail by means of embodiments with reference to the drawing. Show it:
Figure 1
a side and bottom view of a filler bag attachable to a valve plate;
Figure 2
a valve unit consisting of valve plate, housing, element and filling bag;
Figure 3
the valve unit inserted in a compressed gas container and
Figure 4
the valve unit inserted into the compressed gas container, the filling bag being filled.

Die in Figur 1 gezeigte, als Aerosolventil ausgebildete Ventileinheit 4 hat einen Ventilteller 3, ein als Federpfanne ausgebildetes Ventilelement 9, ein Ventilgehäuse 8, das an seinem oberen Bereich durch Eincrimpung mit dem Ventilteller 3 verbunden und in dem die Federpfanne 9 aufgenommen ist, und einen Füllbeutel 2. In der Darstellung ist der Füllbeutel 2 noch nicht am Ventilteller 3 befestigt.The valve unit 4 shown in FIG. 1, designed as an aerosol valve, has a valve plate 3, a valve element 9 designed as a spring socket, a valve housing 8, which is connected to the valve plate 3 by crimping and in which the spring socket 9 is received, and one Filling bag 2. In the illustration, the filling bag 2 is not yet attached to the valve plate 3.

Der Füllbeutel 2 besteht aus einem flexiblen Kunststoffmaterial, vorzugsweise aus Polyethylen, ist von der Grundform her etwa zylindrisch ausgebildet und hat einen konvex nach unten gekrümmten Bodenbereich 20 sowie einen sich daran anschließenden Rumpf 19. Oberhalb des Rumpfs 19 ist eine Einschnürung 13 ausgebildet, die in einem Erweiterungsbereich 18 in den Rumpf 19 übergeht. An ihrem oberen Ende geht die Einschnürung 13 in einen sich erweiternden Mündungsbereich 1 über; der Mündungsbereich 1 hat im Anschluß an die Einschnürung 13 zunächst einen sich stark radial erweiternden Unterabschnitt 21, einen sich daran anschließenden, etwa zylindrisch ausgebildeten Mittelabschnitt 24 und eine sich oben an den Mittelabschnitt 24 anschließende, umlaufende und im Querschnitt muldenförmig ausgebildete Krempe 5. Am Rumpf 19 des Füllbeutels 2 sind nach innen eingebuchtete Längsnuten 14, die sich bis in den Bodenbereich 20 des Füllbeutels erstrecken, und nach außen vorstehende Ausbuchtungen 22, die sich bis in den Erweiterungsbereich 18 des Füllbeutels 2 erstrecken, ausgebildet.The filling bag 2 consists of a flexible plastic material, preferably of polyethylene, is of the basic shape forth approximately cylindrical and has a convex downwardly curved base region 20 and an adjoining fuselage 19. Above the fuselage 19, a constriction 13 is formed which merges into the fuselage 19 in an extension region 18. At its upper end, the constriction 13 merges into an expanding mouth region 1; the mouth region 1 has, following the constriction 13, initially a radially widening subsection 21, an adjoining, approximately cylindrical middle section 24 and a circumferential and trough-shaped brim 5 adjoining the middle section 24 at the top 19 of the filling bag 2 are formed inward indented longitudinal grooves 14, which extend into the bottom region 20 of the filling bag, and outwardly protruding bulges 22, which extend into the extension region 18 of the filling bag 2.

Der Ventilteller 3 ist an seinem Tellerrand 6 muldenförmig gebogen. Im Bereich des Tellerrands 6 entspricht die untere Fläche 15 des Ventiltellers 3 von ihrer Formgebung her der Krempe 5 des Füllbeutels 2. Am Scheitel der Krempe 5 oder an der entsprechenden Stelle an der Unterfläche 15 des muldenförmigen Tellerrands 6 kann eine nicht dargestellte kreisförmige Dichtlippe angeordnet werden.The valve plate 3 is trough-shaped at its plate edge 6. In the area of the plate rim 6, the shape of the lower surface 15 of the valve plate 3 corresponds to the brim 5 of the filling bag 2. At the apex of the brim 5 or at the corresponding location on the lower surface 15 of the trough-shaped plate rim 6, a circular sealing lip (not shown) can be arranged .

Um den Füllbeutel 2 mit dem Ventilteller 3 zu verbinden und so die einteilige Ventileinheit bzw. Ventil-Beutel-Einheit 4 herzustellen, wird der Füllbeutel 2 in bezug auf den Ventilteller 3 so positioniert, daß die Krempe 5 des Füllbeutels 2 ggf. unter Zwischenschaltung der oben erwähnten Dichtlippe in Anlage an die im Bereich des Tellerrands 6 muldenförmige Unterfläche 15 des Ventiltellers 3 gerät. Bei dieser Positionierung des Füllbeutels 2 gerät die Innenfläche der Einschnürung 13 des Füllbeutels 2 in die Nähe oder sogar in Anlage an die Außenfläche des Ventilgehäuses 8. Nunmehr wird mittels einer Hohlnadel 7 die Federpfanne 9 innerhalb des Ventilgehäuses 8 eingedrückt; von außen wird das Ventilgehäuse 8 mit Unterdruck beaufschlagt, woraufhin der Innenraum 17 des Füllbeutels 2 evakuiert wird. Bei dieser Evakuierung haftet der Mündungsbereich 1 des Füllbeutels 2 fest an der Unterfläche 15 des Ventiltellers 3 an, wobei insbesondere die Krempe 5 und der etwa zylindrische Mittelabschnitt 24 des Mündungsbereiches 1 aufgrund der Wirkung des Unterdrucks fest an die Unterfläche 15 des Ventiltellers 3 angepreßt werden. Auch die Innenfläche der Einschnürung 13 gerät in feste Anlage an die Außenfläche des Ventilgehäuses 8, woraus eine Positionierung des evakuierten Füllbeutels 2 etwa senkrecht zum Ventilteller 3 resultiert. Aufgrund seiner Ausbildung mit den vier Längsnuten 14 und den vier Ausbuchtungen 22 nimmt die Querschnittsform des Füllbeutels 2 im dargestellten Ausführungsbeispiel nach der Evakuierung die in Figur 2 unten dargestellte Gestalt an.In order to connect the filling bag 2 to the valve plate 3 and thus the one-piece valve unit or valve-bag unit 4 To produce, the filling bag 2 is positioned with respect to the valve plate 3 so that the brim 5 of the filling bag 2 comes into contact with the trough-shaped lower surface 15 of the valve plate 3, possibly with the interposition of the sealing lip mentioned above. With this positioning of the filling bag 2, the inner surface of the constriction 13 of the filling bag 2 comes close to or even in contact with the outer surface of the valve housing 8. The spring socket 9 is now pressed into the valve housing 8 by means of a hollow needle 7; A vacuum is applied to the valve housing 8 from the outside, whereupon the interior 17 of the filling bag 2 is evacuated. During this evacuation, the mouth area 1 of the filling bag 2 adheres firmly to the lower surface 15 of the valve plate 3, the brim 5 and the approximately cylindrical central section 24 of the mouth area 1 being pressed firmly against the lower surface 15 of the valve plate 3 due to the effect of the negative pressure. The inner surface of the constriction 13 also comes into firm contact with the outer surface of the valve housing 8, which results in the evacuated filling bag 2 being positioned approximately perpendicular to the valve disk 3. Due to its design with the four longitudinal grooves 14 and the four bulges 22, the cross-sectional shape of the filling bag 2 in the exemplary embodiment shown assumes the shape shown in FIG. 2 below after the evacuation.

Es ist auch möglich, im Füllbeutel 2 lediglich zwei einander diametral gegenüberliegende Längsnuten 14 auszubilden, woraufhin der Füllbeutel 2 nach seiner Evakuierung in einfacher Weise in Richtung auf den Ventilteller 3 aufgerollt werden kann.It is also possible to form only two diametrically opposite longitudinal grooves 14 in the filling bag 2, whereupon the filling bag 2 can be rolled up in a simple manner towards the valve plate 3 after its evacuation.

Durch eine entsprechende Formgebung des Füllbeutels 2 kann dieser nach der Evakuierung jede gewünschte Gestalt annehmen.By appropriately shaping the filling bag 2, it can assume any desired shape after the evacuation.

Nach der Evakuierung, d.h. nach der Entlüftung des Innenraums 17 des Füllbeutels 2, wird die Hohlnadel 7 abgezogen. Aufgrund der Federspannung der Federpfanne 9 wird das Ventilgehäuse 8 automatisch geschlossen. Der Füllbeutel 2 haftet mit seinem Mündungsbereich 1 fest an der Unterfläche 15 des Ventiltellers 3 an. Eine Trennung ist nur unter Aufbringung einer enorm großen Zugkraft möglich und daher sehr unwahrscheinlich.After evacuation, i.e. After the interior 17 of the filling bag 2 has been vented, the hollow needle 7 is withdrawn. Due to the spring tension of the spring socket 9, the valve housing 8 is closed automatically. The filling bag 2 adheres firmly with its mouth region 1 to the lower surface 15 of the valve plate 3. A separation is only possible with an enormous pulling force and is therefore very unlikely.

Somit ist nach der Evakuierung die in Figur 2 dargestellte Ventil- bzw. Ventil-Beutel-Einheit 4 hergestellt. Diese kann als einheitliches Bauteil gelagert, transportiert und weiter gehandhabt werden.The valve or valve-bag unit 4 shown in FIG. 2 is thus produced after the evacuation. This can be stored, transported and further handled as a single component.

Zum Einbau in eine Druckgaspackung wird die Ventil-Beutel-Einheit durch die Öffnung 16 in einer Stirnseite eines zylindrischen Druckgasbehälters 10 in das Innere des Druckgasbehälters 10 eingesetzt. Der Druckgasbehälter 10 ist am die Öffnung 16 umgrenzenden Randbereich mit einem Rollrand 11 ausgebildet. Dieser Rollrand 11 ist von seiner Formgebung her so ausgebildet, daß er flächig an der durch die Krempe 5 bzw. den Tellerrand 6 ausgestalteten Mulde anliegt. Zur Verbesserung der Dichtigkeitseigenschaften kann am Scheitel der Mulde eine O-Ring-Dichtung 12 eingelegt werden.For installation in a pressurized gas pack, the valve-bag unit is inserted through the opening 16 in an end face of a cylindrical pressurized gas container 10 into the interior of the pressurized gas container 10. The compressed gas container 10 is formed with a rolled edge 11 at the edge region bordering the opening 16. This rolled edge 11 is of its shape ago formed so that it lies flat against the trough designed by the brim 5 or the plate rim 6. To improve the sealing properties, an O-ring seal 12 can be inserted at the top of the trough.

Nach dem Einsetzen der Ventil-Beutel-Einheit 4 in den Druckgasbehälter 10 wird der letztere mit dem Druckgas gefüllt. Hierzu wird die Ventil-Beutel-Einheit 4 aus der in Figur 3 dargestellten Stellung in bezug auf den Druckgasbehälter 10 leicht angehoben. Hierdurch bildet sich zwischen der Außenseite des an der Unterfläche 15 des Ventiltellers 3 haftenden Mündungsbereichs 1 des evakuierten Füllbeutels 2 und dem die Öffnung 16 umgebenden Rollrand 11 des Druckgasbehälters 10 ein Zwischenraum. Durch diesen Zwischenraum wird der Innenraum 23 des Druckgasbehälters 10 mit dem Druckgas gefüllt. Während dieser Füllung wird das Ventil-Beutel-Element 4 magnetisch, pneumatisch und/oder mechanisch in der den Zwischenraum ausbildenden Stellung gehalten. Mit der Füllung des Druckgasbehälters 10 mit Druckgas wird fortgefahren, bis der gesamte, den evakuierten Füllbeutel 2 umgebende Innenraum 23 des Druckgasbehälters 10 mit Druckgas gefüllt ist. Daraufhin wird die Ventil-Beutel-Einheit 4 ganz in den Druckgasbehälter 10 eingesetzt. Hierbei legt sich der mit dem Ventilteller 3 verbundene Mündungsbereich 1 des Füllbeutels 2 mit der Krempe 5 auf den Rollrand 11 des Druckgasbehälters 10. Hiernach wird der Tellerrand 6 des Ventiltellers 3 mit dem Rollrand 11 des Druckgasbehälters 10 verclincht. Bei der Verclinchung fügt sich die zwischen der Krempe 5 und dem Rollrand 11 eingelegte O-Ring-Dichtung abdichtend zwischen die Krempenunterseite und den Rollrand 11 ein.After the valve-bag unit 4 has been inserted into the compressed gas container 10, the latter is filled with the compressed gas. For this purpose, the valve-bag unit 4 is raised slightly from the position shown in FIG. 3 with respect to the compressed gas container 10. As a result, a space is formed between the outside of the mouth region 1 of the evacuated filling bag 2 adhering to the lower surface 15 of the valve plate 3 and the rolled edge 11 of the compressed gas container 10 surrounding the opening 16. Through this space, the interior 23 of the compressed gas container 10 is filled with the compressed gas. During this filling, the valve-bag element 4 is held magnetically, pneumatically and / or mechanically in the position forming the intermediate space. The filling of the compressed gas container 10 with compressed gas is continued until the entire interior 23 of the compressed gas container 10 surrounding the evacuated filling bag 2 is filled with compressed gas. The valve-bag unit 4 is then inserted completely into the compressed gas container 10. In this case, the mouth area 1 of the filling bag 2 connected to the valve plate 3 with the brim 5 lies on the rolled edge 11 of the compressed gas container 10. Thereafter, the plate edge 6 of the valve plate 3 is clinched with the rolled edge 11 of the compressed gas container 10. When clinching, the one inserted between the brim 5 and the rolled edge 11 is inserted An O-ring seal between the underside of the brim and the rolled edge 11.

Wird die Füllung des Druckgasbehälters 10 mit Druckmittel bzw. -gas unter einem definierten Überdruck vorgenommen, was durch Verwendung eines an sich bekannten Überdruck-Füllkopfes geschehen kann, wird dieser definierte Überdruck aufrecht erhalten, bis die Ventil-Beutel-Einheit 4 mit dem evakuierten Füllbeutel 2 am Druckgasbehälter 10 in der vorstehend beschriebenen Weise befestigt bzw. verclincht worden ist. Hierdurch kann im Innenraum 23 des Druckgasbehälters 10 ein definierter Überdruck vorgelegt werden. Um diesen vorgelegten Überdruck erhöht sich der Überdruck im Innenraum des Druckgasbehälters 10 über den durch die Einbringung des flüssigen oder pastösen Füllgutes und durch die Überdehnung des Füllbeutels erzeugten Überdruck hinaus.If the pressure gas container 10 is filled with pressure medium or gas under a defined overpressure, which can be done by using an overpressure filling head known per se, this defined overpressure is maintained until the valve-bag unit 4 with the evacuated filling bag 2 has been attached or clinched on the compressed gas container 10 in the manner described above. As a result, a defined excess pressure can be presented in the interior 23 of the compressed gas container 10. The overpressure in the interior of the compressed gas container 10 increases by this overpressure in excess of the overpressure generated by the introduction of the liquid or pasty filling material and by the overexpansion of the filling bag.

Nach der Verclinchung der Ventil-Beutel-Einheit 4 am Druckgasbehälter 10 und ggf. nach Entfernung des zur Schaffung eines definierten Überdrucks benutzten Überdruck-Füllkopfs wird die im Ventilgehäuse 8 aufgenommene Federpfanne 9 geöffnet, wonach unter Überdruck das Füllgut, bei dem es sich um ein Gas, ein flüssiges oder pastöses Gut handeln kann, beispielsweise mittels eines an sich bekannten Flüssiggas-Füllkopfes in den bis dahin luftleeren bzw. evakuierten Füllbeutel 2 eingefüllt wird. Der bis dahin zusammengezogene Füllbeutel 2 entfaltet sich, bis er seine ursprüngliche Gestalt wieder angenommen hat.After the valve-bag unit 4 has been clinched on the pressurized gas container 10 and, if appropriate, after removal of the excess pressure filling head used to create a defined excess pressure, the spring socket 9 accommodated in the valve housing 8 is opened, after which the excess material, which is a Gas, a liquid or pasty good can act, for example by means of a liquid gas filling head known per se, into the previously empty or evacuated filling bag 2. The previously contracted filling bag 2 unfolds until it has returned to its original shape.

Wird daraufhin mit der Befüllung fortgefahren, erfolgt eine Überdehnung des Füllbeutels 2 mit dem gasförmigen, flüssigen oder pastösen Füllgut über die ursprüngliche Gestalt des Füllbeutels 2 hinaus.If the filling is then continued, the filling bag 2 is overstretched with the gaseous, liquid or pasty filling material beyond the original shape of the filling bag 2.

Die Füllung bzw. Überdehnung des Füllbeutels 2 wird fortgesetzt, bis der Füllbeutel mit seiner Außenfläche weitgehend an der Innenfläche des Druckgasbehälters 10 anliegt.The filling or overstretching of the filling bag 2 is continued until the outer surface of the filling bag largely lies against the inner surface of the compressed gas container 10.

Claims (11)

  1. Method of producing a valve unit having a valve disc (3), a valve element (9), a valve housing, which accommodates the valve element (9), and a filling bag (2), in which method the lower face (15) of the valve disc (3) is brought into adhering and sealing contact with a mouth region (1) of the filling bag (2), which region is shaped to correspond to the lower face (15) of the valve disc (3), and the internal space (17) of the filling bag (2) is evacuated by opening the valve element (9) which is connected to a partial vacuum, characterised in that the adhering and sealing contact of the mouth region (1) of the filling bag (2) with the lower face (15) of the valve disc (3) is produced exclusively by evacuating the internal space (17) of the filling bag (2) by opening the valve element (9) which is connected to a partial vacuum, the inner face of a throat (13) formed below the mouth region (1) of the filling bag (2) coming into contact with the outer face of the valve housing (8).
  2. Valve unit for insertion into a compressed gas pack, having a valve element (9) which can be moved out of a position closing the valve unit (4) into a position opening the valve unit (4), a housing (8) in which the valve element (9) is accommodated, a valve disc (3), on the lower face (15) of which the valve unit (4) can be brought into engagement with an opening region (16) of a compressed gas container (10), and a flexible filling bag (2), the mouth region (1) of which is in adhering and sealing contact with the lower face (15) of the valve disc (3) and which has, below its mouth region (1), a throat (13) having a substantially cylindrical inner face, characterised in that the mouth region (1) of the filling bag (2) and the substantially cylindrical inner face of the throat (13) of the filling bag (2) are fixed securely in position at the lower face (15) of the valve disc (3) and at the outer face of the valve housing (8), respectively, exclusively by evacuating the filling bag (2) when the mouth region (1) is in contact with the lower face (15) of the valve disc (3).
  3. Valve unit according to claim 2, the filling bag (2) of which is provided with outwardly projecting bulges (22) and/or inwardly recessed longitudinal grooves (14) which extend over its body (19) from its widening region (18), arranged below the throat (13), as far as its base region (20).
  4. Valve unit according to claim 2 or 3, on the filling bag (2) of which only two, diametrically opposed, longitudinal grooves (14) are formed.
  5. Valve unit according to any one of claims 2 to 4, wherein the adhering face between the valve disc (3) and the mouth region (1) of the filling bag (2) is formed by the disc edge (6) which is curved in the shape of a trough and a rim (5) which has a corresponding trough shape and is formed on the upper edge of the mouth region (1) of the filling bag (2).
  6. Valve unit according to any one of claims 2 to 5, wherein a sealing element is arranged on the adhering face between the valve disc (3) and the mouth region (1) of the filling bag (2).
  7. Compressed gas pack having a compressed gas container (10) in which is inserted a valve unit (4) having a valve element (9) which can be moved out of a position closing the valve unit (4) into a position opening the valve unit (4), a valve housing (8) in which the valve element (9) is accommodated, a valve disc (3), on the lower face (15) of which the valve unit (4) is in engagement with an opening region (16) of the compressed gas container (10), and a flexible filling bag (2), the mouth region (1) of which is in adhering and sealing contact with the lower face (15) of the valve disc and which has, below its mouth region (1), a throat (13) having a substantially cylindrical inner face, characterised in that the mouth region (1) of the filling bag (2) and the substantially cylindrical inner face of the throat (13) of the filling bag (2) are, before the fixed attachment of the valve unit (4) to the compressed gas container (10), fixed securely in position at the lower face (15) of the valve disc (3) and at the outer face of the valve housing (8), respectively, exclusively by evacuating the filling bag (2) when the mouth region (1) is in contact with the lower face (15) of the valve disc (3).
  8. Method of assembling and filling a compressed gas pack, wherein a valve unit (4) having a valve disc (3), a valve element (9), a valve housing, which accommodates the valve element (9), and a filling bag (2) is inserted into an empty compressed gas container (10) through an opening (16) provided therein, the lower face (15) of the valve disc (3) is brought into adhering and sealing contact with a mouth region of the filling bag, which region is shaped to correspond to the lower face (15) of the valve disc (3), and the internal space (17) of the filling bag is evacuated by opening the valve element (9) which is connected to a partial vacuum, characterised in that the adhering and sealing contact of the mouth region (1) of the filling bag (2) with the lower face (15) of the valve disc (3) is produced exclusively by evacuating the internal space (17) of the filling bag (2) by opening the valve element (9) which is connected to a partial vacuum, the inner face of a throat (13) formed below the mouth region (1) of the filling bag (2) coming into contact with the outer face of the valve housing, in order to form an intermediate space between the mouth region (1) of the evacuated filling bag (2), which region adheres to the lower face (15) of the valve disc (3), and the edge region (11) of the compressed gas container (10), which region surrounds the opening (16), the valve unit (4) is displaced mechanically, magnetically and/or pneumatically with respect to the compressed gas container (10) while compressed gas is being applied to that container (10), the internal space (23) of the compressed gas container (10), which space surrounds the evacuated filling bag (2), is acted upon by compressed gas through that intermediate space, the intermediate space is closed by appropriate displacement of the valve unit (4), the valve disc (3), the lower face (15) of which is provided with the mouth region (1) of the filling bag (2), is securely attached at its plate edge (6) to the edge region (11) of the opening (16) of the compressed gas container (10) by clinching or crimping, and the evacuated filling bag (2) arranged in the compressed gas container (10) containing the compressed gas is filled with the filling material by opening the valve element (9) to which excess pressure is applied.
  9. Method according to claim 8, wherein the filling bag (2) is filled with filling material until substantial sections of its outer face are in contact with the inner face of the compressed gas container (10).
  10. Method according to claim 8 or 9, wherein the filling bag (2) is overstretched when being filled with filling material.
  11. Method according to any one of claims 8 to 10, wherein the compressed gas or compressed medium is introduced through the intermediate space and into the compressed gas container (10) by means of excess pressure.
EP91909259A 1990-06-09 1991-05-08 Method for making a valve assembly, valve assembly, pressure gas package including the valve assembly and method for assembling and filling a pressure gas package Expired - Lifetime EP0486630B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4018528 1990-06-09
DE4018528A DE4018528A1 (en) 1990-06-09 1990-06-09 FLEXIBLE PLASTIC CONTAINER FOR FASTENING ON A RIGID ADHESIVE SURFACE AND METHOD FOR FIXING THE CONTAINER ON A RIGID ADHESIVE SURFACE
PCT/EP1991/000860 WO1991019653A1 (en) 1990-06-09 1991-05-08 Flexible plastic receptacle for fastening to a rigid contact surface and process for fastening the receptacle to a rigid contact surface

Publications (2)

Publication Number Publication Date
EP0486630A1 EP0486630A1 (en) 1992-05-27
EP0486630B1 true EP0486630B1 (en) 1995-07-05

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EP91909259A Expired - Lifetime EP0486630B1 (en) 1990-06-09 1991-05-08 Method for making a valve assembly, valve assembly, pressure gas package including the valve assembly and method for assembling and filling a pressure gas package

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US (1) US5265765A (en)
EP (1) EP0486630B1 (en)
JP (1) JPH06502829A (en)
AT (1) ATE124662T1 (en)
CA (1) CA2059660A1 (en)
DE (4) DE4018528A1 (en)
DK (1) DK0486630T3 (en)
ES (1) ES2077228T3 (en)
WO (1) WO1991019653A1 (en)

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JPH06502829A (en) 1994-03-31
US5265765A (en) 1993-11-30
ATE124662T1 (en) 1995-07-15
DE4018528A1 (en) 1991-12-12
CA2059660A1 (en) 1991-12-10
DE9006547U1 (en) 1991-10-02
EP0486630A1 (en) 1992-05-27
DE9007315U1 (en) 1991-10-10
WO1991019653A1 (en) 1991-12-26
DK0486630T3 (en) 1995-11-20
DE59105925D1 (en) 1995-08-10
ES2077228T3 (en) 1995-11-16

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