EP0434821A1 - Process for filling pressurized-gaz packs. - Google Patents

Process for filling pressurized-gaz packs.

Info

Publication number
EP0434821A1
EP0434821A1 EP90911421A EP90911421A EP0434821A1 EP 0434821 A1 EP0434821 A1 EP 0434821A1 EP 90911421 A EP90911421 A EP 90911421A EP 90911421 A EP90911421 A EP 90911421A EP 0434821 A1 EP0434821 A1 EP 0434821A1
Authority
EP
European Patent Office
Prior art keywords
bag
housing
valve
mouth
filling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90911421A
Other languages
German (de)
French (fr)
Other versions
EP0434821B1 (en
Inventor
Hans Erich Maier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dr Rolf Hirsch Te Stuttgart Bondsrepubliek Duits
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT90911421T priority Critical patent/ATE103552T1/en
Publication of EP0434821A1 publication Critical patent/EP0434821A1/en
Application granted granted Critical
Publication of EP0434821B1 publication Critical patent/EP0434821B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0176—Shape variable
    • F17C2201/018—Shape variable with bladders

Definitions

  • the invention relates to a method for filling Druck ⁇ gas packs, which consist of a housing containing a Druckmit ⁇ tel, and at least one flexible bag located therein, which serves to hold the filling material, the interior of the flexible bag by means of a venti ] s, which is arranged in the region of the mouth of the housing, and the compressed gas pack.
  • 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 the valve is actuated, the filling material and the pressure medium emerge together.
  • the compressed gas packs are so-called two-chamber spray systems in order to avoid that the filling material comes into contact with the housing and / or with the pressure 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 bags made of flexible material, such as thermoplastic plastic or aluminum. The 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 also environmentally compatible compressed air, are used as pressure medium, as are gases condensing under pressure.
  • the object of the invention is to further improve the generic method and the associated compressed gas pack, while avoiding the aforementioned disadvantages, so that not only any pressure medium, in particular air, but also commercially available containers can be used and the entire filling process can be carried out in a comparatively short time and therefore with correspondingly little effort.
  • this object is achieved with respect to the filling method in that the flexible bag is inserted into the Housing is introduced such that there is a gap between the opening edge and the mouth of the housing that the pressure medium is introduced through the gap between the opening edge of the bag and the mouth of the housing that the opening edge of the bag together is tightly closed with the valve with the mouth of the housing, that the valve is actuated to evacuate the interior, and that after the valve is actuated again, the contents are filled into the bag under pressure.
  • the invention further extends to a compressed gas pack which consists of a housing which contains a pressure medium and at least one flexible bag located therein which serves to hold the filling material, the interior of the flexible bag being closed by means of a valve which is arranged in the region of the mouth of the housing.
  • the flexible bag be used as a fold bellows is designed such that its folds fold inwards, so that a comparatively large interior space is available for receiving the pressure medium.
  • a glass bottle is used as the housing 1, which is surrounded by a shatterproof plastic covering.
  • the bag 2 is inserted in the form of a bellows.
  • the bag 2 consists of thermoplastic material, for example polyethylene.
  • the bag 2 is introduced into the "housing 1 in such a way that there is an intermediate space 5 between the opening edge 3 and the mouth 4 of the housing 1.
  • the bag 2 projects beyond the mouth 4 of the housing 1, the valve 6
  • the pressure medium is now filled in through the space 5 between the opening edge 3 of the bag 2 and the mouth 4 of the housing 1, namely via a top of the mouth 4 of the Housing 1 attached filling head.
  • the pressure medium penetrates into the space between the inner wall of the housing 1 and the outer wall of the bag 2.
  • the valve 6 is crimped onto the mouth 4 of the housing 1, the opening edge 3 of the bag 2 being squeezed between the mouth 4 of the housing 1 and the valve 5.
  • FIG. 2 By actuating the valve 6 (FIG. 3) and preferably by applying a vacuum, the bag 2 is completely evacuated, so that it contracts to a considerably smaller volume and the overpressure between the bag 2 and the housing 1 is reduced. There is therefore no residual air in the bag 2.
  • the compressed gas pack prepared by these process steps can either be stored and thus marketed or can also be filled directly with the filling material.
  • the bag 2 By pressing the filling material (FIG. 4) under pressure, the bag 2 expands under the excess pressure when the filling material is pressed in, at the same time the pressure medium in the housing 1 is increased in pressure.
  • the bag expands through the introduced filling material, but no air bubbles can penetrate, so that a flickering or short interruption of the spraying which often occurs in the known two-chamber spraying systems jet or strand in pasty filling goods due to escaping gas bubbles is definitely excluded.
  • the ratio of the volume of the filling material to the volume of the expanded bag is essential.
  • the bag only partially holds the intended filling material, so that the remaining part of the filling material is pressed in by force under the mechanical pressure of the pressure medium while the flexible material is stretched. Due to its flexibility, the bag takes up a larger volume than the previously folded bag. As a result, the intended overpressure of the pressure medium is increased in a controlled manner in the space between the housing and the bag.
  • This stretching of the flexible material of the bag preferably thermoplastic material, improves its molecular structure and physical properties, in particular its permeability. Surprisingly, it was found that diffusion, such as occurred over time in known unstretched bags, no longer takes place.
  • the housing 1 of an aerosol tin can with inserted bag 2 and valve 3 in the form of a poppet valve is shown.
  • the bag 2 with the plate of the valve 6 is pressed into the housing 1, the sealing being carried out by clinching.
  • the opening edge 3 of the bag 2 between the plate of the valve 6 and the mouth 4 of the housing 1 ( Figure 7).
  • the bag 2 is completely evacuated (FIG. 8).
  • the bag 2 expands (FIG. 9) and assumes the compressed form again after its contents have been emptied (FIG. 10).
  • the gassing of the space between the inner wall of the housing and the outer wall of the bag can be carried out in a simple manner with all types of pressure medium in an independent process, so that the empty housings under internal pressure are temporarily stored, marketed or subsequently filling goods can also be loaded immediately later, if necessary;
  • aerosol containers are disposable containers and are not intended for commercial refilling.
  • the housings used are not subject to the compressed gas regulation, it is possible with the aid of the method according to the invention to empty these containers after complete emptying, i.e. after use, refill with fresh product.

Landscapes

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

Abstract

L'invention concerne un procédé pour remplir des conditionnements de gaz comprimé, ainsi que les conditionnements eux-mêmes, lesquels comportent une enveloppe (1) renfermant un agent de pression, et au moins une poche souple (2) située à l'intérieur et servant à recevoir le produit de remplissage. L'espace intérieur de la poche souple (2) est obturé au moyen d'une vanne (6) disposée dans la région de la bouche (4) de l'enveloppe (1). Pour perfectionner encore le procédé précité ainsi que les conditionnements de gaz comprimé s'y rapportant, afin de pouvoir utiliser non seulement n'importe quel agent de pression, notamment de l'air mais également des emballages en fûts métalliques du commerce, et que la totalité du processus de remplissage s'effectue avec une durée relativement plus courte et ainsi à moindres frais, il est proposé dans l'invention de placer la poche souple (2) dans l'enveloppe (1) de manière à laisser entre le bord d'ouverture (3) de la poche (2) et la bouche (4) de l'enveloppe (1) un intervalle (5) pour introduire l'agent de pression. Le bord d'ouverture (3) de la poche (2) conjointement avec la vanne (6) est relié hermétiquement avec la bouche (4) de l'enveloppe (1). Pour réaliser le vide dans l'espace intérieur de la poche (2), on actionne la vanne (6) et après avoir actionné à nouveau cette dernière, on introduit dans la poche (2) le produit de remplissage sous pression. Pour réaliser le vide dans l'espace intérieur de la poche (2), on y applique un vide. La poche souple (2) se présente sous forme de soufflet dont les plis rentrent vers l'intérieur.The invention relates to a method for filling compressed gas packages, as well as the packages themselves, which comprise an envelope (1) containing a pressure agent, and at least one flexible bag (2) located inside and used to receive the filling product. The interior space of the flexible bag (2) is closed off by means of a valve (6) arranged in the region of the mouth (4) of the envelope (1). In order to further improve the aforementioned process as well as the packaging of compressed gas relating thereto, in order to be able to use not only any pressure medium, in particular air, but also packaging in commercial metal drums, and that the the entire filling process is carried out with a relatively shorter duration and thus at lower cost, it is proposed in the invention to place the flexible bag (2) in the envelope (1) so as to leave between the edge of opening (3) of the pocket (2) and the mouth (4) of the casing (1) a gap (5) to introduce the pressure medium. The opening edge (3) of the pocket (2) together with the valve (6) is hermetically connected with the mouth (4) of the casing (1). To create a vacuum in the interior of the pocket (2), the valve (6) is actuated and after having actuated the latter again, the filling product under pressure is introduced into the pocket (2). To create a vacuum in the interior space of the pocket (2), a vacuum is applied thereto. The flexible pocket (2) is in the form of a bellows, the folds of which fall inwards.

Description

Verfahren zur Befüllung von Druckgaspackungen sowie Druckgaspackung Process for filling pressurized gas packs and pressurized gas pack
Die Erfindung betrifft ein Verfahren zur Befüllung von Druck¬ gaspackungen, welche aus einem Gehäuse, welches ein Druckmit¬ tel enthält, und mindestens einem darin befindlichen flexiblen Beutel, welcher der Aufnahme von Füllgut dient, bestehen, wobei der Innenraum des flexiblen Beutels mittels eines venti] s ver¬ schlossen ist, welches im Bereich der Mündung des Gehäuses angeordnet ist, sowie die Druckgaspackung.The invention relates to a method for filling Druck¬ gas packs, which consist of a housing containing a Druckmit¬ tel, and at least one flexible bag located therein, which serves to hold the filling material, the interior of the flexible bag by means of a venti ] s, which is arranged in the region of the mouth of the housing, and the compressed gas pack.
Es sind Druckgaspackungen, welche vielfach als Aerosol! gebinde bezeichnet sind, bekannt, bei denen das Füllgut und das Druck¬ mittel miteinander vermischt, ineinander gelöst und/oder dispergiert sind. Nach Betätigen des Ventils treten das Füll¬ gut und das Druckmittel gemeinsam aus.They are compressed gas packs, which are often used 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 the valve is actuated, 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 Gehäuse und/oder mit dem Druckmittel in Be¬ rührung gelangt. Auf diese Weise ist es möglich, aggressive und pastöse Füllgüter in Metallgehäusen, z.B. Weißblechdosen, abzufüllen und auszusprühen, auszuschäumen oder auszuquetschen, ohne daß eine Vermischung mit dem Druckmittel erfolgt. Bei den Zweikammer-Sprühsystemen findet als Außenbehälter ein Metall- oder Glasgehäuse Verwendung, wie sie als Aerosolge¬ binde seit Jahrzehnten zur Abfüllung von Gütern als Körper¬ pflegemittel, Haarpflegemittel, Insektizide, Imprägniersprays und technische Aerosole usw. eingesetzt werden. Die Innen¬ behälter, die zur Aufnahme des auszubringenden Füllgutes die¬ nen, sind Beutel aus flexiblem Material, wie z.B. thermopla¬ stischem Kunststoff oder Aluminium. Der Beutel, 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.Furthermore, it is known to design the compressed gas packs as so-called two-chamber spray systems in order to avoid that the filling material comes into contact with the housing and / or with the pressure medium. In this way it is possible to fill and spray, foam or squeeze out aggressive and pasty filling goods in metal housings, for example tin cans, without mixing with the pressure medium. 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 bags made of flexible material, such as thermoplastic plastic or aluminum. The 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 also environmentally compatible compressed air, are used as pressure medium, as are gases condensing under pressure.
Allen diesen bekannten Zweikammer-Sprühsystemen ist der Nach¬ teil gemeinsam, daß sich in einem druckfesten Gehäuse an dessen Boden eine Öffnung befindet. Der flexible Beutel wird an dem Rand der Mündung des Gehäuses beim Verschließvorgang durch Einquetschung aufgehängt. Um Raum für die Wandstärke des Innenbeutels zu gewinnen, wird die an den Aerosolgebin¬ den standardmäßig vorhandene Öffnung aufgeweitet. Der AbfüllVorgang geschieht in der Weise, daß zunächst das Füllgut in den zuvor in das Gehäuse eingebrachten leeren Beutel eingefüllt wird, dann der gefüllte Beutel mit aufgesetztem Ventil durch Clinchen mit dem Gehäuse verbunden wird. Mit einer speziellen Vorrichtung wird durch die Boden¬ öffnung das Druckmittel eingebracht. Danach wird die Boden¬ öffnung mit einem elastischen Stopfen verschlossen. Nunmehr wird auf das im Ventil enthaltene Gehäuse der erforderliche Sprühkopf oder Pastenstrangkopf aufgesetzt. Bei Betätigen des Ventilkopfes strömt das Füllgut unter der Einwirkung des den Innenbeutel beaufschlagenden Druckmediums aus dem Gehäuse aus.All these known two-chamber spray systems have the disadvantage in common that there is an opening in a pressure-resistant housing at the bottom thereof. The flexible bag is hung up on the edge of the mouth of the housing during the closing process by squeezing. In order to gain space for the wall thickness of the inner bag, the opening which is present as standard on the aerosol containers is widened. The filling process takes place in such a way that the filling material is first filled into the empty bag previously inserted into the housing, then the filled bag with the valve attached is connected to the housing by clinching. The pressure medium is introduced through the bottom opening using a special device. Then the bottom opening is closed with an elastic stopper. Now the required spray head or paste strand head is placed on the housing contained in the valve. When the valve head is actuated, the filling material flows out of the housing under the influence of the pressure medium acting on the inner bag.
Mit der Erkenntnis, daß die in Aerosolgebinden bis vor kur¬ zem in der Regel enthaltenen Treibmittel, nämlich Fluorchlor¬ kohlenwasserstoffe, 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-Sprüh- systeme, bei denen Druckluft als Druckmedium und damit als Treibmittel verwendet wird, bieten eine gute Alternative. Allerdings weist dieses System verschiedene Nachteile auf. Der in die Bodenöffnung 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 Ein¬ bringen der Bodenöffnung 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 ent¬ sprechen solchermaßen bearbeitete Druckbehälter nicht mehr der ursprünglich von der Behörde dem Dosenhersteller hinsicht¬ lich des Baumusters erteilten Zulassung. Darüber hinaus er¬ weist sich der Füllprozeß dieser Gebinde als zeitraubend, umständlich und kostspielig.With the knowledge that the propellants, namely fluorochlorohydrocarbons, which are usually present in aerosol containers until recently, damage the earth's ozone shell, 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 the pressure medium and thus as a propellant, offer a good alternative. However, this system has several disadvantages. The elastic stopper inserted in the bottom opening leads to a longer service life due to poor sealing irregular formation of the opening and / or fatigue of the material to pressure loss, by which the functionality of these containers is restricted, if not nullified. The widening of the standard opening and the introduction of the bottom 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 approval originally granted by the authority to the can manufacturer with regard to the type. In addition, the filling process of these containers proves to be time-consuming, cumbersome and expensive.
Von diesem Stand der Technik ausgehend, liegt der Erfindung die Aufgabe zugrunde, unter Vermeidung vorerwähnter Nachteile das gattungsgemäße Verfahren sowie die zugehörige Druckgas¬ packung dahingehend weiter zu verbessern, daß nicht nur beliebige Druckmittel, insbesondere Luft, sondern auch han¬ delsübliche Gebinde Verwendung finden können und der gesamte Füllprozeß in vergleichsweise kurzer Zeit und damit mit ent¬ sprechend geringem Aufwand durchführbar ist.Starting from this state of the art, the object of the invention is to further improve the generic method and the associated compressed gas pack, while avoiding the aforementioned disadvantages, so that not only any pressure medium, in particular air, but also commercially available containers can be used and the entire filling process can be carried out in a comparatively short time and therefore with correspondingly little effort.
Ξrfindungsgemäß wird diese Aufgabe in bezug auf das Füll¬ verfahren dadurch gelöst, daß der flexible Beutel in das Gehäuse derart eingebracht wird, daß sich zwischen dessen Öffnungsrand und der Mündung des Gehäuses ein Zwischenraum befindet, daß durch den Zwischenraum zwischen dem Öffnungs¬ rand des Beutels und der Mündung des Gehäuses das Druckmit¬ tel eingeführt wird, daß der Öffnungsrand des Beutels zusam¬ men mit dem Ventil mit der Mündung des Gehäuses dicht verschlossen wird, daß zur Evakuierung des Innenraumes das Ventil betätigt wird und daß nach erneutem Betätigen des Ventils das Füllgut unter Druck in den Beutel eingefüllt wird.According to the invention, this object is achieved with respect to the filling method in that the flexible bag is inserted into the Housing is introduced such that there is a gap between the opening edge and the mouth of the housing that the pressure medium is introduced through the gap between the opening edge of the bag and the mouth of the housing that the opening edge of the bag together is tightly closed with the valve with the mouth of the housing, that the valve is actuated to evacuate the interior, and that after the valve is actuated again, the contents are filled into the bag under pressure.
Um sicherzustellen, daß eine vollständige Evakuierung des Innenraums des Beutels erreicht wird und dieser damit völlig luftleer ist, erweist es sich als vorteilhaft, an diesen ein Vakuum anzulegen.In order to ensure that a complete evacuation of the interior of the bag is achieved and that the bag is thus completely empty, it has proven advantageous to apply a vacuum to it.
Die Erfindung erstreckt sich weiterhin auf eine Druckgas¬ packung, welche aus einem Gehäuse, welches ein Druck¬ mittel enthält, und mindestens einem darin befindlichen flexiblen Beutel, welcher der Aufnahme von Füllgut dient, besteht, wobei der Innenraum des flexiblen Beutels mittels eines Ventils verschlossen ist, welches im Bereich der Mündung des Gehäuses angeordnet ist.The invention further extends to a compressed gas pack which consists of a housing which contains a pressure medium and at least one flexible bag located therein which serves to hold the filling material, the interior of the flexible bag being closed by means of a valve which is arranged in the region of the mouth of the housing.
Es wird vorgeschlagen, daß der flexible Beutel als Falten- balg derart ausgebildet ist, daß sich dessen Falten nach innen einfalten, so daß ein vergleichsweise großer Innenraum für die Aufnahme des Druckmittels zur Verfügung steht.It is proposed that the flexible bag be used as a fold bellows is designed such that its folds fold inwards, so that a comparatively large interior space is available for receiving the pressure medium.
Ausführungsbeispiele der Erfindung sind anhand der Zeich¬ nungen näher erläutert, und zwar zeigt:Exemplary embodiments of the invention are explained in more detail with reference to the drawings, which show:
Fig. 1 - Fig. 5 in den einzelnen Verfahrensschritten die Ab¬ füllung einer Aerosol-Glasflasche und1 - 5 show the filling of an aerosol glass bottle and
Fig. 6 - Fig. 10 in den einzelnen Verfahrensschritten die6-10 in the individual process steps
Abfüllung einer Aerosol-Weißblechdose.Filling an aerosol tin can.
Bei der Ausführung nach Figur 1 - Figur 5 findet als Gehäuse 1 eine Glasflasche Verwendung, welche von einer splittersi¬ cheren KunststoffUmhüllung umgeben ist. In das Gehäuse ] ist der Beutel 2 in Form eines Faltenbalges eingesetzt. Der Beu¬ tel 2 besteht aus thermoplastischem Material, z.B. Polyethylen. Der Beutel 2 wird derart in das" Gehäuse 1 eingebracht, daß sich zwischen dessen Öffnungsrand 3 und der Mündung 4 des Gehäuses 1 ein Zwischenraum 5 befindet. Zu diesem Zweck ragt der Beutel 2 über die Mündung 4 des Gehäuses 1 hinaus, wobei das Ventil 6 in Form eines Kapselventils leicht angehoben ist. Durch den Zwischenraum 5 zwischen dem Öffnungsrand 3 des Beutels 2 und der Mündung 4 des Gehäuses 1 wird nunmehr das Druckmittel eingefüllt, und zwar über einen von oben auf die Mündung 4 des Gehäuses 1 aufgesetzten Füllkopf. Aus diesem dringt das Druckmittel in den Zwischenraum zwischen Innenwandung des Gehäuses 1 und Außenwandung des Beutels 2 ein. Sobald der gewünschte Überdruck in dem Gehäuse 1 erreicht ist, wird das Ventil 6 mit der Mündung 4 des Gehäuses 1 vercrimpt, wobei der Öffnungsrand 3 des Beutels 2 zwischen der Mündung 4 des Gehäuses 1 und dem Ventil 5 eingequetscht v/ird. Diese Ver¬ fahrensstufe ergibt sich aus Figur 2. Durch Betätigung des Ventils 6 (Figur 3) und vorzugsweise Anlegen eines Vakuums wird der Beutel 2 völlig evakuiert, so daß er auf ein er¬ heblich geringeres Volumen zusammengezogen und der Überdruck zwischen Beutel 2 und Gehäuse 1 verringert wird. Somit befindet sich keine Restluft mehr in dem Beutel 2.In the embodiment according to FIGS. 1 to 5, a glass bottle is used as the housing 1, which is surrounded by a shatterproof plastic covering. In the housing] the bag 2 is inserted in the form of a bellows. The bag 2 consists of thermoplastic material, for example polyethylene. The bag 2 is introduced into the "housing 1 in such a way that there is an intermediate space 5 between the opening edge 3 and the mouth 4 of the housing 1. For this purpose, the bag 2 projects beyond the mouth 4 of the housing 1, the valve 6 The pressure medium is now filled in through the space 5 between the opening edge 3 of the bag 2 and the mouth 4 of the housing 1, namely via a top of the mouth 4 of the Housing 1 attached filling head. From this, the pressure medium penetrates into the space between the inner wall of the housing 1 and the outer wall of the bag 2. As soon as the desired overpressure has been reached in the housing 1, the valve 6 is crimped onto the mouth 4 of the housing 1, the opening edge 3 of the bag 2 being squeezed between the mouth 4 of the housing 1 and the valve 5. This process stage results from FIG. 2. By actuating the valve 6 (FIG. 3) and preferably by applying a vacuum, the bag 2 is completely evacuated, so that it contracts to a considerably smaller volume and the overpressure between the bag 2 and the housing 1 is reduced. There is therefore no residual air in the bag 2.
Die durch diese Verfahrensschritte vorbereitete Druckgas¬ packung kann entweder gelagert und so vermarktet oder un¬ mittelbar auch mit dem Füllgut verfüllt werden. Durch Ein¬ pressen des Füllgutes (Figur 4)- unter Druck, dehnt sich der Beutel 2 unter dem Überdruck beim Einpressen des Füll¬ gutes, wobei gleichzeitig eine Druckerhöhung des im Ge¬ häuse 1 vorhandenen Druckmittels erfolgt. XΫährend des Füll¬ prozesses weitet sich der Beutel durch das eingebrachte Füllgut, wobei jedoch keine Luftblasen eindringen können, so daß ein bei den bekannten Zweikammer-Sprühsystemen oft auftretendes Flackern oder kurzes Unterbrechen des Sprüh- strahls oder des Stranges bei pastösen Füllgütern infolge austretender Gasblasen mit Sicherheit ausgeschlossen wird.The compressed gas pack prepared by these process steps can either be stored and thus marketed or can also be filled directly with the filling material. By pressing the filling material (FIG. 4) under pressure, the bag 2 expands under the excess pressure when the filling material is pressed in, at the same time the pressure medium in the housing 1 is increased in pressure. During the filling process, the bag expands through the introduced filling material, but no air bubbles can penetrate, so that a flickering or short interruption of the spraying which often occurs in the known two-chamber spraying systems jet or strand in pasty filling goods due to escaping gas bubbles is definitely excluded.
Von wesentlicher Bedeutung ist das Verhältnis von Volumen des Füllgutes und Volumen des aufgeweiteten Beutels. Der Beu¬ tel faßt das vorgesehene Füllgut nur zu einem Teil, so daß der übrige Teil des Füllgutes unter dem mechanischen Druck des Druckmittels unter Dehnung des flexiblen Materials gewalt¬ sam eingepreßt wird. Der Beutel nimmt infolge seiner Flexi¬ bilität ein größeres Volumen ein, als der zuvor gefaltete Beutel. Hierdurch wird in dem Zwischenraum zwischen Gehäuse und Beutel der vorgesehene Überdruck des Druckmittels kon¬ trolliert erhöht. Durch dieses Recken des flexiblen Materials des Beutels, vorzugsweise thermoplastischem Materials, ver¬ bessern sich dessen Molekularstruktur sowie physikalischen Eigenschaften, insbesondere die Permeabilität. Überraschend wurde gefunden, daß eine Diffusion, wie sie bei bekannten ungereckten Beuteln im Laufe der Zeit eintrat, nicht mehr erfolgt. Durch die Ausdehnung des Beutels während der Be¬ füllung mit Füllgut wird dieser zur Berührung mit dem Boden des Gehäuses und/oder mit dessen Wandung gebracht, wodurch sich ein festverankerter Sitz des Beutels in dem Gehäuse ergibt. Bei den bekannten Zeikammer-Sprühsystemen erweist es sich nämlich oft als nachteilig, daß der Beutel frei in dem Gehäuse schwingen kann und es somit auf dem Transportwege infolge des Schwingens zu einer mechanischen Ausdünnung der Wandstärke des Beutels im oberen Bereich und sogar zum Ab¬ riß desselben kommen kann, was nach dem erfindungsgemäßen Füllverfahren ausgeschlossen ist.The ratio of the volume of the filling material to the volume of the expanded bag is essential. The bag only partially holds the intended filling material, so that the remaining part of the filling material is pressed in by force under the mechanical pressure of the pressure medium while the flexible material is stretched. Due to its flexibility, the bag takes up a larger volume than the previously folded bag. As a result, the intended overpressure of the pressure medium is increased in a controlled manner in the space between the housing and the bag. This stretching of the flexible material of the bag, preferably thermoplastic material, improves its molecular structure and physical properties, in particular its permeability. Surprisingly, it was found that diffusion, such as occurred over time in known unstretched bags, no longer takes place. Due to the expansion of the bag during the filling with the filling material, it is brought into contact with the bottom of the housing and / or with its wall, which results in a firmly anchored seat of the bag in the housing. In the known Zeikammer spray systems, it often proves to be disadvantageous that the bag can swing freely in the housing and thus it is transported As a result of the oscillation, the wall thickness of the bag can be thinned mechanically in the upper region and even torn off, which is excluded by the filling method according to the invention.
Während des Entleerens des Beutels 2 der Druckgaspackung durch Betätigen des Ventils, zieht sich der Beutel 2 durch seine Rückverformungstendenz sowie infolge des pneumatischen Überdruckes im Gehäuse 1 wieder zusammen (Figur 5) .During the emptying of the bag 2 of the pressurized gas pack by actuating the valve, the bag 2 contracts again due to its tendency to deform and as a result of the pneumatic overpressure in the housing 1 (FIG. 5).
Bei dem Ausführungsbeispiel gemäß Figur 6 - Figur 10 ist das Gehäuse 1 einer Aerosol-Weißblechdose mit eingesetztem Beutel 2 und aufgesetztem Ventil 3 in Form eines Tellerven¬ tils gezeigt.In the exemplary embodiment according to FIGS. 6-10, the housing 1 of an aerosol tin can with inserted bag 2 and valve 3 in the form of a poppet valve is shown.
Die einzelnen Verfahrensschritte der Befüllung sowohl mit Druckmittel als auch mit Füllgut sind die gleichen v/ie vor¬ stehend beim Ausführungsbeispiel nach Figur 1 - Figur 5 beschrieben.The individual process steps of filling both with pressure medium and with filling material are the same as described above in the exemplary embodiment according to FIGS. 1-5.
Nach Erreichen des geforderten Überdrucks im Inneren des Gehäuses 1 wird der Beutel 2 mit dem Teller des Ventils 6 in das Gehäuse 1 hineingedrückt, wobei die Abdichtung durch Clinchen vorgenommen wird. Hierbei befindet sich der Öffnungs¬ rand 3 des Beutels 2 zwischen dem Teller des Ventils 6 und der Mündung 4 des Gehäuses 1 (Figur 7). Nach Öffnen des Ventils 6 und Anlegen eines Vakuums wird der Beutel 2 völlig evakuiert (Figur 8) . Durch das Einpressen des Füllgutes unter Druck dehnt sich der Beutel 2 aus (Figur 9) und nimmt nach Entleerung seines Inhalts wieder die zusammengepreßte Form an (Figur 10) .After the required overpressure has been reached inside the housing 1, the bag 2 with the plate of the valve 6 is pressed into the housing 1, the sealing being carried out by clinching. Here is the opening edge 3 of the bag 2 between the plate of the valve 6 and the mouth 4 of the housing 1 (Figure 7). After opening the valve 6 and applying a vacuum, the bag 2 is completely evacuated (FIG. 8). By pressing in the filling material under pressure, the bag 2 expands (FIG. 9) and assumes the compressed form again after its contents have been emptied (FIG. 10).
Durch das erfindungsgemäße Verfahren ist es im Unterschied zu den bekannten Zweikammer-Sprühsystemen möglichIn contrast to the known two-chamber spray systems, the method according to the invention makes it possible
a. handelsübliche Aerosolgebinde ohne jegliche Veränderungen an der Mündung und/oder am Boden einzusetzen;a. use commercially available aerosol containers without any changes to the mouth and / or the bottom;
b. die Begasung des Zwischenraumes zwischen Innenwandung des Gehäuses und Außenwandung des Beutels unabhängig von der Be¬ schaffenheit der jeweiligen Füllgüter auf einfache Weise mit sämtlichen Arten von Druckmitteln in einem unabhängigen Ar¬ beitsgang vorzunehmen, so daß die unter Innendruck stehenden leeren Gehäuse zwischengelagert, vermarktet oder anschließend sofort ggf. auch später mit Füllgütern beschickt werden kön¬ nen;b. the gassing of the space between the inner wall of the housing and the outer wall of the bag, regardless of the nature of the respective filling goods, can be carried out in a simple manner with all types of pressure medium in an independent process, so that the empty housings under internal pressure are temporarily stored, marketed or subsequently filling goods can also be loaded immediately later, if necessary;
c. den luftfreien, zusammengepreßten Beutel einem Reckprozeß zu unterziehen und damit dessen physikalische Eigenschaften, insbesondere die Diffusionsbeständigkeit, zu verbessern; 3 1-c. to subject the air-free, compressed bag to a stretching process and thus to improve its physical properties, in particular the resistance to diffusion; 3 1-
d. die Geschwindigkeit der Abfüllung wesentlich zu erhöhen;d. significantly increase the speed of filling;
e. den in den begasten Leergehäusen vorhandenen relativ ge¬ ringen und daher ungefährlichen Überdruck durch den Füllvor¬ gang mit Füllgut anzuheben unde. to raise the existing in the fumigated empty housing relatively low and therefore harmless overpressure by the filling process with filling material and
f. in besonderen Fällen eine einfache Wiederbefüllung von leergesprühten Gebinden mit frischem Füllgut vorzunehmen.f. in special cases, a simple refilling of empty sprayed containers with fresh contents.
Aerosolgebinde sind bestimmungsgemäß Einwegbehälter und für eine gewerbliche Wiederbefüllung nicht vorgesehen. Für den Fall, daß die eingesetzten Gehäuse nicht der Druckgasver¬ ordnung unterliegen, ist es mit Hilfe des erfindungsgemäßen Verfahrens möglich, diese Behälter nach vollständiger Ent¬ leerung, d.h. nach Gebrauch, wieder mit frischem Füllgut nachzu üllen. As intended, aerosol containers are disposable containers and are not intended for commercial refilling. In the event that the housings used are not subject to the compressed gas regulation, it is possible with the aid of the method according to the invention to empty these containers after complete emptying, i.e. after use, refill with fresh product.

Claims

P A T E N A N S P R Ü C H E : PATENT REQUESTS:
1. Verfahren zur Befüllung von Druckgaspackungen, welche aus einem Gehäuse (1), welches ein Druckmittel enthält, und mindestens einem darin befindlichen flexiblen Beutel (2), welcher der Aufnahme von Füllgut dient, besteht, wobei der Innenraum des flexiblen Beutels (2) mittels eines Ventils (6) verschlossen ist, welches im Bereich der Mündung (4) des Gehäuses (1) angeordnet ist, dadurch gekennzeichnet, daß der flexible Beutel (2) in das Gehäuse (1) derart eingebracht wird, daß sich zwischen dessen Öffnungsrand (3) und der Mündung (4) des Gehäuses (1) ein Zwischenraum (5) befindet, daß durch den Zwischenraum (5) zwischen dem Öffnungsrand (3) des Beutels (2) und der Mündung (4) des Gehäuses (1) das Druck¬ mittel eingefüllt wird, daß der ffnungsrand (3) des Beu¬ tels (2) zusammen mit dem Ventil (6) mit der Mündung (4) des Gehäuses (1) dicht verschlossen wird, daß zur Evakuierung des Innenraums des Beutels (2) das Ventil (3) betätigt wird und daß nach erneutem Betätigen des Ventils (6) das Füllgut unter Druck in den Beutel (2) eingefüllt wird.1. Method for filling compressed gas packs, which consists of a housing (1) which contains a pressure medium and at least one flexible bag (2) located therein, which serves to hold the filling material, the interior of the flexible bag (2) is closed by means of a valve (6) which is arranged in the region of the mouth (4) of the housing (1 ) , characterized in that the flexible bag (2) is introduced into the housing (1) in such a way that there is between the opening edge thereof (3) and the mouth (4) of the housing (1) there is a space (5) that through the space (5) between the opening edge (3) of the bag (2) and the mouth (4) of the housing (1) the pressure medium is filled in so that the opening edge (3) of the bag (2) is sealed together with the valve (6) with the mouth (4) of the housing (1) so that for evacuating the interior of the bag ( 2) the valve (3) is actuated and that after pressing the valve (6) again, the contents are filled under pressure into the bag (2).
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß zur Evakuierung des Innenraums des Beutels (2) an diesen ein Vakuum angelegt wird.2. The method according to claim 1, characterized in that for evacuating the interior of the bag (2) a vacuum is applied to this.
3. Druckgaspackungen, welche aus einem Gehäuse (1), welches ein Druckmittel enthält, und mindestens einem darin befindlichen flexiblen Beutel (2), welcher der Aufnahme von Füllgut dient, besteht, wobei der Innenraum des flexiblen Beutels (?) mittels eines Ventils (6) verschlossen ist, welches im Bereich der Mündung (4) des Gehäuses (1) angeordnet ist, insbesondere mit Druckmittel und Füllgut gefüllt nach dem Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der flexible Beutel (2) derart als Faltenbalg ausgebildet ist, daß sich dessen Falten nach innen einfalten.3. Compressed gas packs, which consist of a housing (1) which contains a pressure medium and at least one flexible bag (2) located therein, which serves to hold the filling material, the interior of the flexible bag (?) Using a valve ( 6) is closed, which is arranged in the region of the mouth (4) of the housing (1), in particular filled with pressure medium and filling material according to the method of claim 1, characterized in that the flexible bag (2) is designed as a bellows, that its folds fold inwards.
ATT ATT
EP90911421A 1989-07-19 1990-07-19 Process for filling pressurized-gaz packs Expired - Lifetime EP0434821B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90911421T ATE103552T1 (en) 1989-07-19 1990-07-19 PROCEDURE FOR FILLING AEROSOLS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3923903 1989-07-19
DE3923903A DE3923903A1 (en) 1989-07-19 1989-07-19 METHOD FOR FILLING COMPRESSED GAS PACKS AND COMPRESSED GAS PACKING

Publications (2)

Publication Number Publication Date
EP0434821A1 true EP0434821A1 (en) 1991-07-03
EP0434821B1 EP0434821B1 (en) 1994-03-30

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EP (1) EP0434821B1 (en)
JP (1) JPH04500793A (en)
AT (1) ATE103552T1 (en)
CA (1) CA2037055A1 (en)
DE (2) DE3923903A1 (en)
DK (1) DK0434821T3 (en)
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WO (1) WO1991001252A1 (en)

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Also Published As

Publication number Publication date
US5505039A (en) 1996-04-09
EP0434821B1 (en) 1994-03-30
CA2037055A1 (en) 1991-01-20
DE3923903A1 (en) 1991-01-24
ES2054367T3 (en) 1994-08-01
DE59005196D1 (en) 1994-05-05
JPH04500793A (en) 1992-02-13
WO1991001252A1 (en) 1991-02-07
ATE103552T1 (en) 1994-04-15
DK0434821T3 (en) 1995-03-27

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