FR2501080A1 - Two ingredient mixture applicator - has coaxial cartridges each containing liq. or pasty ingredient with coaxial dispensing nozzle - Google Patents

Two ingredient mixture applicator - has coaxial cartridges each containing liq. or pasty ingredient with coaxial dispensing nozzle Download PDF

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Publication number
FR2501080A1
FR2501080A1 FR8104213A FR8104213A FR2501080A1 FR 2501080 A1 FR2501080 A1 FR 2501080A1 FR 8104213 A FR8104213 A FR 8104213A FR 8104213 A FR8104213 A FR 8104213A FR 2501080 A1 FR2501080 A1 FR 2501080A1
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France
Prior art keywords
cartridges
cartridge
central
rod
coaxial
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FR8104213A
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French (fr)
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Individual
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Individual
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Priority to FR8104213A priority Critical patent/FR2501080A1/en
Publication of FR2501080A1 publication Critical patent/FR2501080A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00503—Details of the outlet element
    • B05C17/00516—Shape or geometry of the outlet orifice or the outlet element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/44—Mixers in which the components are pressed through slits
    • B01F25/441—Mixers in which the components are pressed through slits characterised by the configuration of the surfaces forming the slits
    • B01F25/4413—Mixers in which the components are pressed through slits characterised by the configuration of the surfaces forming the slits the slits being formed between opposed conical or cylindrical surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/44—Mixers in which the components are pressed through slits
    • B01F25/441—Mixers in which the components are pressed through slits characterised by the configuration of the surfaces forming the slits
    • B01F25/4416—Mixers in which the components are pressed through slits characterised by the configuration of the surfaces forming the slits the opposed surfaces being provided with grooves
    • B01F25/44164—Crossing sets of grooves forming a labyrinth formed on opposed surfaces, e.g. on planar surfaces or on cylinders or cones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/44—Mixers in which the components are pressed through slits
    • B01F25/441—Mixers in which the components are pressed through slits characterised by the configuration of the surfaces forming the slits
    • B01F25/4416—Mixers in which the components are pressed through slits characterised by the configuration of the surfaces forming the slits the opposed surfaces being provided with grooves
    • B01F25/44167—Mixers in which the components are pressed through slits characterised by the configuration of the surfaces forming the slits the opposed surfaces being provided with grooves the grooves being formed on the outer surface of the cylindrical or conical core of the slits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00553—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00553—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components
    • B05C17/00559—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components the different components being stored in coaxial chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/2305—Mixers of the two-component package type, i.e. where at least two components are separately stored, and are mixed in the moment of application
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/50—Movable or transportable mixing devices or plants
    • B01F33/501—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use
    • B01F33/5011—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use portable during use, e.g. hand-held
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/01—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like

Abstract

The dispenser applies a mixture of two or more liquid or pasty ingredients, and has two coaxial cartridges each filled with an ingredient, open at one end and with a central discharge nozzle at the other. Central and annular pistons form sliding seals in the central cartridge and in the annular chamber formed between the central cartridge and the outer cartridge. The discharge nozzle (20) of the outer cartridge (16) is of larger diameter than, and coaxial to, that (14) of the inner one (10). A hollow distance piece (22) forms a radial path (26,28) between the bottoms (12,18) of the cartridges, connecting the annular chamber (38) to the outer cartridge nozzle.

Description

La présente invention concerne un dispositif destiné à l'application, leextrusion ou l'injection simultanée de composants liquides ou pâteux, tels que colles, mastics ou graisses. The present invention relates to a device intended for the application, the extrusion or the simultaneous injection of liquid or pasty components, such as adhesives, sealants or greases.

On connait des dispositifs de ce type dans lesquels les composants sont conditionnés dans des cartouches disposées côte-à-côte et dont les sorties se rejoignent dans une buse en Y où les composants sont mélangés pour former un produit homogène. Devices of this type are known in which the components are packaged in cartridges arranged side by side and whose outlets meet in a Y-nozzle where the components are mixed to form a homogeneous product.

Dans d'autres dispositifs connus, les composants sont conditionnés dans des cartouches coaxiales dont les sorties sont décalées radialement l'une par rapport à autre. De telles cartouches ne sont pas disponibles dans le commerce et elles doivent donc être fabriquées spécialement pour cette application. De plus, à la sortie des cartouches, les composants suivent des trajets distincts et ne commencent à se mélanger que dans la branche centrale de la buse en Y. In other known devices, the components are packaged in coaxial cartridges, the outputs of which are offset radially with respect to one another. Such cartridges are not commercially available and therefore must be manufactured specifically for this application. In addition, at the outlet of the cartridges, the components follow separate paths and only begin to mix in the central branch of the Y-nozzle.

Une telle buse n'assure donc qu'un mélange imparfait et comporte une portion importante de sa longueur qui n'intervient pas dans l'opération du mélange.Such a nozzle therefore ensures only an imperfect mixture and comprises a significant portion of its length which does not intervene in the operation of the mixture.

La présente invention propose un dispositif pour l'application d'au moins deux composants, qui utilise des cartouches simples, de forme courante et qui assure un bon mélange des composants dès la sortie des cartouches. Elle concerne à cet effet un dispositif du type comprenant au moins deux cartouches coaxiales remplies chacune de lsun des composants, ouvertes à une extrémité et fermées à l'aux tre extrémité par un fond pourvu d'une buse centrale de sortIe, un piston central et un piston annulaire montés coulissants avec étanchéité respectivement à l'intérieur de la cartouche interne et de la chambre tubulaire définie entre les deux cartouches, et un mécanisme d'entrainement desdits pistons,dispositif caractérisé en ce que la buse de sortie de la cartouche externe est de plus grand diamètre et coaxiale à celle de la cartouche interne, un élément creux d'espacement étant prévu pour ménager entre les deux fonds des cartouches un trajet radial reliant ladite chambre tubulaire et la buse de sortie de la cartouche externe. The present invention provides a device for applying at least two components, which uses simple cartridges, of common shape and which ensures good mixing of the components as soon as they come out of the cartridges. To this end, it relates to a device of the type comprising at least two coaxial cartridges each filled with one of the components, open at one end and closed at the other end by a bottom provided with a central outlet nozzle, a central piston and an annular piston mounted sliding with sealing respectively inside the internal cartridge and the tubular chamber defined between the two cartridges, and a mechanism for driving said pistons, device characterized in that the outlet nozzle of the external cartridge is of larger diameter and coaxial with that of the internal cartridge, a hollow spacing element being provided to provide between the two bottoms of the cartridges a radial path connecting said tubular chamber and the outlet nozzle of the external cartridge.

De telles cartouches ont l'avantage d'être disponibles dans le commerce. De plus, elles permettent aux composants de se mélanger dès leur sortie des buses. The advantage of such cartridges is that they are commercially available. In addition, they allow the components to mix as soon as they exit the nozzles.

Selon un mode de réalisation particulier de ltinven- tion, ledit mécanisme d'entralement comprend une première tige terminée à une extrémité par un poussoir destiné à s'appuyer contre le piston central de la cartouche interne, au moins deux secondes tiges parallèles entre elles et fixées par une extrémité en deux points diamétralement opposés d'un poussoir annulaire destiné à s'appuyer sur le piston annulaire de la cartouche externe, lesdites première et seconde tiges étant reliées entre elles par leur autre extrémité par un élément transversal de solidarisation, et une gachet- te agissant sur l'une desdites tiges de manière à faire avancer l'ensemble des deux pistons chaque fois mulon appuie sur la gâchette. According to a particular embodiment of the invention, said interposition mechanism comprises a first rod terminated at one end by a pusher intended to bear against the central piston of the internal cartridge, at least two second rods parallel to each other and fixed by one end at two diametrically opposite points of an annular plunger intended to bear on the annular piston of the external cartridge, said first and second rods being connected to each other by their other end by a transverse fastening element, and a trigger acting on one of said rods so as to advance the assembly of the two pistons each time mulon presses the trigger.

Un mode de réalisation de l'invention sera décrit à présent en regard des dessins annexés dans lesquels:
La figure 1 est une vue en perspective avec arrachement partiel du dispositif selon un mode de réalisation de 1 invention;
La figure 2 est une vue en coupe axiale partielle du dispositif de la figure 1;
La figure 3 est une vue en perspective éclatée des cartouches interne et externe;
La figure 4 est une vue du mélangeur statique de la figure 2 et que l'on suppose développé sur un plan; et
La figure 5 est une vue en coupe suivant la ligne
V-V de la figure 2.An embodiment of the invention will now be described with reference to the accompanying drawings in which:
Figure 1 is a perspective view with partial cutaway of the device according to an embodiment of 1 invention;
Figure 2 is a partial axial sectional view of the device of Figure 1;
Figure 3 is an exploded perspective view of the inner and outer cartridges;
Figure 4 is a view of the static mixer of Figure 2 and assumed to be developed on a plane; and
Figure 5 is a sectional view along the line
VV of figure 2.

La description qui va suivre sera faite dans le cas du mélange de deux composants, mais il est évident que le principe de linvention s'applique aussi bien au cas du mélange de plus de deux composants. The following description will be made in the case of the mixture of two components, but it is obvious that the principle of the invention applies equally well in the case of the mixture of more than two components.

Avec référence aux figures 1 et 2, le dispositif selon l'invention comprend une cartouche cylindrique interne 10 ouverte à une extrémité et fermée à l'autre extrémité par un fond 12 pourvu d'un orifice de sortie en forme de buse 14 et une cartouche coaxiale externe 16 de diamètre supérieur à celui de la cartouche 10, ouverte à une extrémité et fermée à l'autre extrémité par un fond 18, et pourvue d'un orifice en forme de buse 20, coaxiale à la buse de sortie 14. With reference to Figures 1 and 2, the device according to the invention comprises an internal cylindrical cartridge 10 open at one end and closed at the other end by a bottom 12 provided with a nozzle-shaped outlet orifice 14 and a cartridge external coaxial 16 with a diameter greater than that of the cartridge 10, open at one end and closed at the other end by a bottom 18, and provided with a nozzle-shaped orifice 20, coaxial with the outlet nozzle 14.

Les cartouches sont destinées à recevoir des composants liquides ou pâteux, par exemple des mastics, colles ou graisses, destinés à réagir entre eux juste au moment de l'application. Un premier composant remplit tout le volume interne de la cartouche 10, tandis qu'un second composant remplit la chambre tubulaire 38 ménagée entre les cartouches 10 et 16. Bien entendu, l'évidement 24 peut avoir toute autre forme, par exemple en spirale, qui permette au composant contenu dans la chambre 38 de s'écouler vers la buse 20. Dans les cartouches 10 et 16 sont adaptés avec étanchéité, respectivement, un piston central 39 et un piston annulaire 41. The cartridges are intended to receive liquid or pasty components, for example sealants, glues or greases, intended to react with each other just at the time of application. A first component fills the entire internal volume of the cartridge 10, while a second component fills the tubular chamber 38 formed between the cartridges 10 and 16. Of course, the recess 24 can have any other shape, for example in a spiral, which allows the component contained in the chamber 38 to flow towards the nozzle 20. In the cartridges 10 and 16 are adapted with sealing, respectively, a central piston 39 and an annular piston 41.

Autour de la buse 14 est fixée, par tout moyen approprié, une bride plate circulaire 22, de diamètre égal au diamètre interne de la cartouche 16, de sorte que sa portion périphérique est en saillie par rapport à la paroi externe de la cartouche 10. Cette portion en saillie sert notamment à maintenir la coaxialité entre les cartouches à l'extrémité de sortie. La bride 22 présente sur sa face externe un évidement allongé 24 intéressant seulement une fraction de son épaisseur. Comme le montrent les figures 2 et 3, cet évidement présente deux portions radiales 26, 28 aboutissant au voisinage de la périphérie de la bride et se raccordant tangentiellement à une portion circulaire 30 située autour du centre de la bride 22. Aux extrémités des évidements radiaux, la bride est percée de part en part par deux trous 32, 34.La bride 22 présente en son centre un orifice traversé par la buse 14 de la cartouche centrale. Around the nozzle 14 is fixed, by any suitable means, a circular flat flange 22, of diameter equal to the internal diameter of the cartridge 16, so that its peripheral portion projects from the external wall of the cartridge 10. This protruding portion is used in particular to maintain coaxiality between the cartridges at the outlet end. The flange 22 has on its outer face an elongated recess 24 of interest only a fraction of its thickness. As shown in Figures 2 and 3, this recess has two radial portions 26, 28 ending in the vicinity of the periphery of the flange and tangentially connecting to a circular portion 30 located around the center of the flange 22. At the ends of the radial recesses , the flange is pierced right through by two holes 32, 34. The flange 22 has in its center an orifice through which the nozzle 14 of the central cartridge passes.

Sur la buse 20 est adapté un injecteur tubulaire 40 dans lequel est logé un mélangeur statique 42 constitué par une pièce cylindrique pourvue d'un pas de vis à gauche et d'un pas de vis à droite. Dans l'exemple illustré aux figures 2, 4 et 5, le mélangeur comporte trois filets à gauche et trois filets à droite, mais il pourrait en comporter un nombre supérieur à trois. Les rainures 41, 43 comprises entre les filets se croisent plusieurs fois, de sorte que les composants sortant par les buses 14 et 20 subissent un brassage énergique aux différents points de croisement 45 des rainures et qu'à la sortie du mélangeur on obtient un mélange homogène des deux composants. On the nozzle 20 is adapted a tubular injector 40 in which is housed a static mixer 42 consisting of a cylindrical piece provided with a thread on the left and a thread on the right. In the example illustrated in FIGS. 2, 4 and 5, the mixer has three threads on the left and three threads on the right, but it could include a number greater than three. The grooves 41, 43 included between the threads intersect several times, so that the components leaving by the nozzles 14 and 20 undergo vigorous mixing at the various crossing points 45 of the grooves and that at the outlet of the mixer a mixture is obtained. homogeneous of the two components.

La longueur du mélangeur et le nombre de ses filets seront calculés en fonction de la viscosité des composants. The length of the mixer and the number of its threads will be calculated according to the viscosity of the components.

On pourra utiliser plusieurs mélangeurs disposés bout à bout avec éventuellement des entretoises de séparation.It is possible to use several mixers arranged end to end with optionally separation spacers.

La figure 1 montre un mode de réalisation particulier d'un pistolet destiné à éjecter ledit mélange. On trouvera une description détaillée du mécanisme d'avance de ce pistolet dans la demande de brevet français nO 79 07 311 au nom du Demandeur. Dans ce qui suit, on ne décrira en-détail que les éléments nouveaux du pistolet. Figure 1 shows a particular embodiment of a gun for ejecting said mixture. A detailed description of the advance mechanism of this pistol can be found in French patent application No. 79 07 311 in the name of the Applicant. In what follows, we will describe in detail only the new elements of the gun.

Le pistolet comprend un tube 44 destiné à recevoir les cartouches 10, 16. Le tube est fermé à son extrémité avant part un couvercle amovible 46 et son extrémité arrière est vissée dans une coupelle 48, sur le fond de laquelle est fixée, par exemple par soudage, une poignée de préhension 50 en forme d'étrier. Une tige à crémaillère 52 orientée selon lwaxe du tube 44 traverse avec jeu un trou 54 percé au centre du fond de la coupelle 48 et un trou 56 percé sur l'âme de la poignée et aligné avec le trou 54. La tige 52 porte à son extrémité intérieure au tube, un poussoir central 58 destiné -i s'appuyer contre le piston central 39. The gun comprises a tube 44 intended to receive the cartridges 10, 16. The tube is closed at its front end leaves a removable cover 46 and its rear end is screwed into a cup 48, on the bottom of which is fixed, for example by welding, a grip handle 50 in the shape of a stirrup. A rack rod 52 oriented along the axis of the tube 44 crosses with clearance a hole 54 drilled in the center of the bottom of the cup 48 and a hole 56 drilled on the core of the handle and aligned with the hole 54. The rod 52 leads to its end inside the tube, a central pusher 58 intended to rest against the central piston 39.

Le fond de la coupelle est percé de deux autres orifices auquels sont adaptés deux manchons tubulaires 60, 62. The bottom of the cup is pierced with two other orifices to which two tubular sleeves 60, 62 are adapted.

Dans ces manchons sont montées coulissantes deux tiges 64, 66 parallèles à la crémaillère 52. Les extrémités des tiges 64, 66 intérieures au tube 44 sont fixées en deux points diamétralement opposés d'un poussoir annulaire 68 destiné à prendre appui sur le piston annulaire 41. In these sleeves are slidably mounted two rods 64, 66 parallel to the rack 52. The ends of the rods 64, 66 inside the tube 44 are fixed at two diametrically opposite points of an annular plunger 68 intended to bear on the annular piston 41 .

Les tiges 64, 66 et la crémaillère 52 sont solidarisées en translation au moyen d'un axe transversal 70 reliant leurs extrémités extérieures au tube 44. La crémaillère traverse avec jeu un trou transversal 72 percé à travers l'axe 70 et porte, de part et d'autre dudit trou, deux bagues 74, 75 s'opposant au coulissement de la crémaillère seule, mais autorisant la rotation de celle-ci autour de son axe. A son extrémité libre, la crémaillère présente une poignée 76 par laquelle elle peut être tournée. The rods 64, 66 and the rack 52 are secured in translation by means of a transverse axis 70 connecting their outer ends to the tube 44. The rack crosses with clearance a transverse hole 72 drilled through the axis 70 and carries, from hand and on the other side of said hole, two rings 74, 75 opposing the sliding of the rack alone, but allowing the rotation of the latter about its axis. At its free end, the rack has a handle 76 by which it can be turned.

Les deux poussoirs 58, 68 peuvent être entraînés au moyen d'un mécanisme connu en soi, comprenant une gâchette 78, un cliquet d'avance et un criquet anti-retour, non représentés, coopérant avec la denture de la crémaillère. The two pushers 58, 68 can be driven by means of a mechanism known per se, comprising a trigger 78, a feed pawl and a non-return cricket, not shown, cooperating with the teeth of the rack.

Le montage du dispositif selon ce mode de réalisation est le suivant:
On tourne la crémaillère 52 d'un demi-tour par rapport à la position qu'elle a sur la figure 1, de manière à dégager les cliquets de la denture de la crémaillère, puis on tire à fond vers la droite sur la figure 1 l'équipage mobile qui comprend la crémaillère 52 et les tiges 64, 66.The assembly of the device according to this embodiment is as follows:
The rack 52 is turned a half-turn relative to the position it has in FIG. 1, so as to release the pawls from the teeth of the rack, then one pulls fully to the right in FIG. 1 the movable assembly which comprises the rack 52 and the rods 64, 66.

On retire le couvercle 46 et l'on introduit ensuite dans le tube 44 de nouvelles cartouches coaxiales 10, 16. On adapte sur la buse 20 de la cartouche 16 l'injecteur 40 équipé de son mélangeur statique, puis on ferme le tube avec son couvercle 46. Les cartouches sont alors fermement maintenues contre tout déplacement et le dispositif est prêt à être utilisé.The cover 46 is removed and new coaxial cartridges 10, 16 are then introduced into the tube 44. The injector 40 fitted with its static mixer is fitted on the nozzle 20 of the cartridge 16, then the tube is closed with its cover 46. The cartridges are then firmly held against any displacement and the device is ready to be used.

A chaque actionnement de la gâchette, les poussoirs 58, 68 avancent d'une course prédéterminée, expulsant à travers les buses 14 et 20 des doses de composants qui sont ensuite mélangées dans le mélangeur statique 42. Each time the trigger is actuated, the pushers 58, 68 advance in a predetermined stroke, expelling through the nozzles 14 and 20 doses of components which are then mixed in the static mixer 42.

Avantageusement, la poignée 50 et la gâchette 78 du pistolet se raccordent sans discontinuité par des portions arrondies 80, 82, de sorte que l'on ne risque pas de se pincer la main lorsqu'on presse la gâchette. Advantageously, the handle 50 and the trigger 78 of the gun are connected without discontinuity by rounded portions 80, 82, so that there is no risk of pinching your hand when the trigger is pressed.

Le remplacement des cartouches pourra se faire soit par l'avant du tube 44, après retrait du couvercle 46, soit par l'arrière après dévissage du tube 44. The cartridges can be replaced either by the front of the tube 44, after removing the cover 46, or by the rear after unscrewing the tube 44.

Le pistolet qui vient d'être décrit utilise un mécanisme d'avance à cliquets et crémaillère, mais on pourrait aussi bien utiliser un mécanisme d'avance par friction bien connu en soi. The gun which has just been described uses a ratchet and rack advance mechanism, but one could as well use a friction advance mechanism well known in itself.

Les quantités volumiques des composants dans le mélange sont évidemment respectivement proportionnelles aux sections de la cartouche 10 et de la chambre annulaire 38, Par exemple, pour obtenir un mélange équivolumique, on choisira des cartouches 10 et 16 de diamètres intérieurs respectifs 2 et 2 2 d et D tels que: D = d + (d + 2e), e étant l'épaisseur de la cartouche interne. The volume quantities of the components in the mixture are obviously respectively proportional to the sections of the cartridge 10 and of the annular chamber 38, for example, to obtain an equivolumic mixture, one will choose cartridges 10 and 16 of respective internal diameters 2 and 2 2 d and D such that: D = d + (d + 2e), e being the thickness of the internal cartridge.

Comme on le sait, lorsque deux composants de viscosités différentes s'écoulent dans un même conduit, le composant le plus visqueux a une tendance naturelle à circuler au centre du conduit alors que le composant le moins visqueux s'écoule contre les parois du conduit. En conditionnant le composant le plus visqueux dans la cartouche 16 de plus grand diamètre et le composant le moins visqueux dans la cartouche 10 de plus petit diamètre, on établit dans ltin- jecteur 40 une disposition des composants inverse de la disposition naturelle. Etant donné que les composants ont tendance à reprendre leur disposition naturelle, il se produit un pré-mélange avant le passage des composants dans le mélangeur statique. On notera qu'un tel mélange ne peut se produire dans les dispositifs connus mentionnés précédemment, comportant des sorties de buses décaléesaxialement. As is known, when two components of different viscosities flow in the same conduit, the most viscous component has a natural tendency to flow in the center of the conduit while the least viscous component flows against the walls of the conduit. By conditioning the most viscous component in the cartridge 16 of larger diameter and the least viscous component in the cartridge 10 of smaller diameter, one establishes in the injector 40 an arrangement of the components opposite to the natural arrangement. Since the components tend to return to their natural arrangement, there is a premix before the components pass through the static mixer. It will be noted that such a mixture cannot occur in the known devices mentioned above, comprising axially offset nozzle outlets.

Avantageusement, on pourrait prévoir à la sortie des buses 14 et 20 des clapets anti-retour qui s'ouvrent lorsque les composants sont extrudés, mais qui obturent les buses lorsqu'il se crée une dépression dans les cartouches, par exemple lorsquton fait reculer l'équipage mobile. On évite ainsi que les composants se trouvant dans l'injecteur 40 et qui ont déjà subi un pré-mélange ou même un mélange, ne soient aspirés dans les cartouches.  Advantageously, non-return valves could be provided at the outlet of the nozzles 14 and 20 which open when the components are extruded, but which close off the nozzles when a vacuum is created in the cartridges, for example when the mobile equipment. This prevents the components in the injector 40 and which have already undergone a premixing or even mixing, from being drawn into the cartridges.

Claims (13)

REVENDICATIONS 1.- Dispositif pour l'application d'un mélange d'au moins deux composants liquides ou pâteux, du type comprenant au moins deux cartouches coaxiales remplies chacune de l'un des composants, ouvertes à une extrémité et fermées à l'autre extrémité par un fond pourvu d'une buse centrale de sortie, un piston central et un piston annulaire montés coulissants avec étanchéité respectivement à l'intérieur de la cartouche interne et de la chambre tubulaire définie entre les deux cartouches, et un mécanisme d'entraînement desdits pistons, caractérisé en ce que la buse de sortie 20 de la cartouche externe 16 est de plus grand diamètre et coaxiale à celle 14 de la cartouche interne 10, un élément creux d'espacement 22 étant prévu pour ménager, entre les deux fonds 12, 18 des cartouches ,un trajet radial 26, 28 reliant ladite chambre tubulaire 38 et la buse de sortie 20 de la cartouche externe. 1.- Device for applying a mixture of at least two liquid or pasty components, of the type comprising at least two coaxial cartridges each filled with one of the components, open at one end and closed at the other end by a bottom provided with a central outlet nozzle, a central piston and an annular piston mounted to slide with sealing respectively inside the internal cartridge and the tubular chamber defined between the two cartridges, and a drive mechanism for said pistons, characterized in that the outlet nozzle 20 of the external cartridge 16 is of larger diameter and coaxial with that 14 of the internal cartridge 10, a hollow spacer 22 being provided to provide, between the two bottoms 12, 18 of the cartridges, a radial path 26, 28 connecting said tubular chamber 38 and the outlet nozzle 20 of the external cartridge. 2.- Dispositif selon la revendication 1, caractérisé en ce que ledit élément creux d'espacement est constitué par une bride plate 22 de section sensiblement égale à la section interne de la cartouche externe 16 et présentant en son centre un orifice pour le passage de la buse de sortie 14 de la cartouche interne, ledit élément d'espacement comportant, sur sa face tournée vers le fond 18 de la cartouche externe 16, un évidement central 30 entourant la buse 14 et relié, par un canal percé dans l'épaisseur de la bride, à au moins un orifice de la bride débouchant dans la chambre tubulaire 38 comprise entre les cartouches 10 et 16. 2.- Device according to claim 1, characterized in that said hollow spacer element is constituted by a flat flange 22 of section substantially equal to the internal section of the external cartridge 16 and having in its center an orifice for the passage of the outlet nozzle 14 of the internal cartridge, said spacer element comprising, on its face facing the bottom 18 of the external cartridge 16, a central recess 30 surrounding the nozzle 14 and connected, by a channel drilled in the thickness of the flange, to at least one orifice of the flange opening into the tubular chamber 38 between the cartridges 10 and 16. 3.- Dispositif selon la revendication 2, caractérisé en ce que le ou les canaux 26, 28 se raccordent tangentiellement à l'évidement central 30. 3.- Device according to claim 2, characterized in that the channel or channels 26, 28 are connected tangentially to the central recess 30. 4.- Dispositif selon l'une des revendications 2 et 3, caractérisé en ce que les canaux 26, 28 sont formés sur la face de la bride qui est tournée vers le fond 18 de la cartouche externe et leur profondeur n'intéresse qu'une partie de l'épaisseur de ladite bride 22.  4.- Device according to one of claims 2 and 3, characterized in that the channels 26, 28 are formed on the face of the flange which is turned towards the bottom 18 of the external cartridge and their depth is only of interest part of the thickness of said flange 22. 5.- Dispositif selon l'une des revendications précédentes, caractérisé en ce que la bride 22 est fixée par tout moyen approprié sur la buse 14 de la cartouche interne 10, par exemple par emmanchement, vissage ou collage. 5.- Device according to one of the preceding claims, characterized in that the flange 22 is fixed by any suitable means on the nozzle 14 of the internal cartridge 10, for example by fitting, screwing or gluing. 6.- Dispositif selon la revendication 1, caractérisé en ce que ledit mécanisme d'entratnement comprend une première tige 52 portant à une extrémité un poussoir 5 destiné à s'appuyer sur le piston central 39, au moins deux secondes tiges 64, 66 parallèles à la première tige et fixées par une extrémité en deux points diamétralement opposés d'un poussoir annulaire 68, destiné à prendre appui sur le piston annulaire 41, lesdites première et seconde tiges étant reliées entre elles,par leur autre extrémité, par une barre transversale de solidarisation 70, L'équipage mobile constitué par les poussoirs et les tiges étant en trainé vers l'avant par la gâchette 78 d'un pistolet, laquelle coopère avec l'une desdites tiges, des moyens anti-recul étant prévus pour s'opposer au recul de l'équipage mobile lorsque la gâchette est relâchée. 6.- Device according to claim 1, characterized in that said drive mechanism comprises a first rod 52 carrying at one end a pusher 5 intended to bear on the central piston 39, at least two second rods 64, 66 parallel to the first rod and fixed by one end at two diametrically opposite points of an annular plunger 68, intended to bear on the annular piston 41, said first and second rods being connected together, by their other end, by a transverse bar of attachment 70, the movable assembly consisting of the pushers and the rods being dragged forward by the trigger 78 of a gun, which cooperates with one of said rods, anti-recoil means being provided for oppose the recoil of the moving part when the trigger is released. 7.- Dispositif selon l'une des revendications précédentes, caractérisé en ce que le pistolet est du type à crémaillère, la denture de crémaillère étant formée sur la tige 52 portant le poussoir central 58, et en ce que cette dernière est solidaire en translation avec la barre de solidarisation 70, mais peut tourner par rapport àieile.  7.- Device according to one of the preceding claims, characterized in that the gun is of the rack type, the rack teeth being formed on the rod 52 carrying the central pusher 58, and in that the latter is secured in translation with the joining bar 70, but can rotate relative to the island. 8.- Dispositif selon la revendication 7, caractérisé en ce que la tige 52 portant le poussoir central traverse avec jeu un trou 72 percé à travers ladite barre de solidarisation 70 et porte, de part et d'autre dudit trou, deux bagues fixes 74, 75 s'opposant au mouvement de translation de la tige portant le poussoir central. 8.- Device according to claim 7, characterized in that the rod 52 carrying the central pusher crosses with clearance a hole 72 drilled through said securing bar 70 and carries, on either side of said hole, two fixed rings 74 , 75 opposing the translational movement of the rod carrying the central pusher. 9.- Dispositif selon la revendication 8, caractérisé en ce que la tige 52 portant le poussoir central se termine par une portion de préhension 76 par laquellé on peut faire pivoter ladite tige pour la désolidariser des cliquets.  9.- Device according to claim 8, characterized in that the rod 52 carrying the central pusher ends in a gripping portion 76 by which one can rotate said rod to separate it from the pawls. 10.- Dispositif selon l'une des revendications 1 à ó, caractérisé en ce que le pistolet est du type à friction, comprenant une gâchette qui agit sur au moins une première plaquette de friction enfilée autour de la tige portant le poussoir central, de façon à déplacer l'équipage mobile vers taxant, et une seconde plaquette de friction également enfilée autour de ladite tige et s'opposant au recul de l'équipage mobile. 10.- Device according to one of claims 1 to ó, characterized in that the gun is of the friction type, comprising a trigger which acts on at least a first friction plate threaded around the rod carrying the central pusher, so as to move the moving element towards taxing, and a second friction plate also threaded around said rod and opposing the recoil of the moving element. 11.- Dispositif selon l'une des revendications 6 à 10, caractérisé en ce que la poignée 50 et la gâchette 78 du pistolet se raccordent sans discontinuité par des portions arrondies 80, 82. 11.- Device according to one of claims 6 to 10, characterized in that the handle 50 and the trigger 78 of the gun are connected without discontinuity by rounded portions 80, 82. 12.- Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il comporte un mélan geur statique logé dans un injecteur tubulaire 40 qui est adapté autour de la buse de sortie 20 de la cartouche externe 16, ledit mélangeur statique étant constitué par une pièce cylindrique 42 pourvue d'un filetage à gauche et d'un filetage à drie, de sorte que les rainures 41, 43 comprises entre les filets se croisent plusieurs fois et qu'aux poiittsCe croisement 45, les composants sortant des cartouches subissent un mélange énergique. 12.- Device according to one of the preceding claims, characterized in that it comprises a static mixer housed in a tubular injector 40 which is fitted around the outlet nozzle 20 of the external cartridge 16, said static mixer being constituted by a cylindrical piece 42 provided with a left-hand thread and a drie thread, so that the grooves 41, 43 included between the threads intersect several times and that at the points of this crossing 45, the components leaving the cartridges undergo an energetic mix. 13.- Dispositif selon l'une des revendications précédentes, caractérisé en ce que des clapets anti-retour Oit éve.-tuellemealt montés dans les buses de sortie 14 et 20 afin d'empêcher la réaspiration des composants se trouvant dans lsinjecteut 40, vers les cartouches 10, 16.  13.- Device according to one of the preceding claims, characterized in that check valves Oit éve.-tuellemealt mounted in the outlet nozzles 14 and 20 in order to prevent the re-aspiration of the components being in injector 40, towards cartridges 10, 16.
FR8104213A 1981-03-03 1981-03-03 Two ingredient mixture applicator - has coaxial cartridges each containing liq. or pasty ingredient with coaxial dispensing nozzle Withdrawn FR2501080A1 (en)

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FR2532862A1 (en) * 1982-09-15 1984-03-16 Hilti Ag PORTABLE APPARATUS FOR DISTRIBUTING PASTA WITH MULTIPLE COMPONENTS
EP0213073A1 (en) * 1985-08-12 1987-03-04 Ciba-Geigy Ag Device for mixing and applying liquid or pasty substances
EP0378806A2 (en) * 1989-01-17 1990-07-25 THERA Patent GmbH & Co. KG Gesellschaft für industrielle Schutzrechte Device for mixing and dispensing pasty products
US4949874A (en) * 1987-12-04 1990-08-21 Henkel Kommanditgesellschaft Auf Aktien Device for dispensing at least two flowable substances
EP0436155A2 (en) * 1990-01-05 1991-07-10 Maderag Ag Extrusion gun for double-wall cartridges
EP0472448A2 (en) * 1990-08-23 1992-02-26 Bostik Limited Process and device for combining two pasty materials
WO1993014863A1 (en) * 1992-01-30 1993-08-05 Bostik S.A. Process and appliance for premixing pasty materials
EP0566951A1 (en) * 1992-04-24 1993-10-27 MASCHINENFABRIK HENNECKE GmbH Mixing head for mixing at least two flowable reactive components for making a plastic material
US5295613A (en) * 1991-07-10 1994-03-22 Societe De Prospection Et D'inventions Techniques (S.P.I.T.) Tubular cartridge for storing and applying a non-solid product, and a drive and thrust assembly for the cartridge
WO1995005984A2 (en) * 1993-08-20 1995-03-02 Keller Wilhelm A Multiple component metering and relative proportioning device with collapsible cartridge
ES2072222A2 (en) * 1993-11-18 1995-07-01 Canut Salvador Ribera Apparatus with improved cartridge for applying pasty products
ES2117530A1 (en) * 1995-02-02 1998-08-01 Alcala Fibras Mixer mechanism for manufacturing polyurethane foam
EP0830900A3 (en) * 1996-09-19 1999-03-10 Soraton SA Hand actuated tool
EP1006057A1 (en) * 1998-12-04 2000-06-07 Sika AG, vorm. Kaspar Winkler & Co. Dosage device
WO2000040341A1 (en) * 1998-12-30 2000-07-13 Sulzer Chemtech Ag Ejection device for a cartridge
EP1360997A2 (en) * 2002-05-10 2003-11-12 Giacomo Mealli Device for instant mixing and delivery of bi-components products
WO2007015720A1 (en) * 2005-08-01 2007-02-08 Rich Products Corporation Dispensing device
US7320596B2 (en) * 2002-12-09 2008-01-22 Dentsply International Inc. Cartridge for viscuos dental material
GB2475955A (en) * 2009-11-18 2011-06-08 Martin Richard Housden Hand held dispenser
ES2424895A1 (en) * 2012-04-03 2013-10-09 Salvador Cabeza Sanchez Cartridge for masses of two components with premixed in nozzle. (Machine-translation by Google Translate, not legally binding)
US8561854B2 (en) 2005-08-01 2013-10-22 Rich Products Corporation Dispensing device for viscous materials
WO2017218952A1 (en) * 2016-06-16 2017-12-21 Sigma Phase, Corp. System for providing a single serving of a frozen confection
US10334868B2 (en) 2016-06-16 2019-07-02 Sigma Phase, Corp. System for providing a single serving of a frozen confection
US10752432B2 (en) 2018-08-17 2020-08-25 Sigma Phase, Corp. Rapidly cooling food and drinks
US10897916B2 (en) 2016-06-16 2021-01-26 Sigma Phase, Corp. System for providing a single serving of a frozen confection
US11109610B2 (en) 2020-01-15 2021-09-07 Coldsnap, Corp. Rapidly cooling food and drinks
US11280543B2 (en) 2018-08-17 2022-03-22 Coldsnap, Corp. Rapidly cooling food and drinks
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US11278110B2 (en) * 2017-12-21 2022-03-22 The Boeing Company Methods for dispensing a brushable substance onto a surface
US11278930B2 (en) * 2017-12-21 2022-03-22 The Boeing Company Methods for dispensing a brushable substance onto a surface
US11286100B2 (en) * 2017-12-21 2022-03-29 The Boeing Company Methods for depositing an extrudable substance onto a surface
US11470855B2 (en) 2018-08-17 2022-10-18 Coldsnap, Corp. Providing single servings of cooled foods and drinks
EP4151321A1 (en) * 2021-09-21 2023-03-22 Hilti Aktiengesellschaft Supporting structure with varying inside diameter for pressure-free extrusion of a multicomponent compound from a coaxial cartridge
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Publication number Priority date Publication date Assignee Title
FR2532862A1 (en) * 1982-09-15 1984-03-16 Hilti Ag PORTABLE APPARATUS FOR DISTRIBUTING PASTA WITH MULTIPLE COMPONENTS
EP0213073A1 (en) * 1985-08-12 1987-03-04 Ciba-Geigy Ag Device for mixing and applying liquid or pasty substances
US4690306A (en) * 1985-08-12 1987-09-01 Ciba-Geigy Corporation Dispensing device for storing and applying at least one liquid or pasty substance
US4949874A (en) * 1987-12-04 1990-08-21 Henkel Kommanditgesellschaft Auf Aktien Device for dispensing at least two flowable substances
EP0378806A2 (en) * 1989-01-17 1990-07-25 THERA Patent GmbH & Co. KG Gesellschaft für industrielle Schutzrechte Device for mixing and dispensing pasty products
EP0378806A3 (en) * 1989-01-17 1991-05-15 THERA Patent GmbH & Co. KG Gesellschaft für industrielle Schutzrechte Device for mixing and dispensing pasty products
US5080262A (en) * 1989-01-17 1992-01-14 Thera Patent Gmbh & Co. Kg Gesellschaft Fur Industrielle Schutzrechte Mixing dispenser for pasty masses
EP0436155A2 (en) * 1990-01-05 1991-07-10 Maderag Ag Extrusion gun for double-wall cartridges
EP0436155A3 (en) * 1990-01-05 1991-12-04 Maderag Ag Extrusion gun for double-wall cartridges
US5139171A (en) * 1990-01-05 1992-08-18 Maderag Ag Ejector pistol for double-walled cartridges
EP0472448A2 (en) * 1990-08-23 1992-02-26 Bostik Limited Process and device for combining two pasty materials
EP0472448A3 (en) * 1990-08-23 1992-04-08 Bostik Limited Process and device for combining two pasty materials
US5295613A (en) * 1991-07-10 1994-03-22 Societe De Prospection Et D'inventions Techniques (S.P.I.T.) Tubular cartridge for storing and applying a non-solid product, and a drive and thrust assembly for the cartridge
US5339992A (en) * 1991-07-10 1994-08-23 Societe De Prospection Et D'inventions Techniques (S.P.I.T. Tubular cartridge for storing and applying a non-solid product, and a drive and thrust assembly for the cartridge
WO1993014863A1 (en) * 1992-01-30 1993-08-05 Bostik S.A. Process and appliance for premixing pasty materials
US5312596A (en) * 1992-04-24 1994-05-17 Maschinenfabrik Hennecke Gmbh Mixhead for mixing at least two free-flowing reaction components
EP0566951A1 (en) * 1992-04-24 1993-10-27 MASCHINENFABRIK HENNECKE GmbH Mixing head for mixing at least two flowable reactive components for making a plastic material
US5647510A (en) * 1993-08-20 1997-07-15 Keller; Wilhelm A. Multiple component metering and relative proportioning device with collapsible cartridge
WO1995005984A2 (en) * 1993-08-20 1995-03-02 Keller Wilhelm A Multiple component metering and relative proportioning device with collapsible cartridge
WO1995005984A3 (en) * 1993-08-20 1995-04-20 Wilhelm A Keller Multiple component metering and relative proportioning device with collapsible cartridge
ES2072222A2 (en) * 1993-11-18 1995-07-01 Canut Salvador Ribera Apparatus with improved cartridge for applying pasty products
ES2117530A1 (en) * 1995-02-02 1998-08-01 Alcala Fibras Mixer mechanism for manufacturing polyurethane foam
EP0830900A3 (en) * 1996-09-19 1999-03-10 Soraton SA Hand actuated tool
EP1006057A1 (en) * 1998-12-04 2000-06-07 Sika AG, vorm. Kaspar Winkler & Co. Dosage device
WO2000040341A1 (en) * 1998-12-30 2000-07-13 Sulzer Chemtech Ag Ejection device for a cartridge
EP1360997A2 (en) * 2002-05-10 2003-11-12 Giacomo Mealli Device for instant mixing and delivery of bi-components products
EP1360997A3 (en) * 2002-05-10 2006-05-31 Giacomo Mealli Device for instant mixing and delivery of bi-components products
US7320596B2 (en) * 2002-12-09 2008-01-22 Dentsply International Inc. Cartridge for viscuos dental material
US8870035B2 (en) 2005-08-01 2014-10-28 Rich Products Corporation Dispensing device
US8297481B2 (en) 2005-08-01 2012-10-30 Rich Products Corporation Dispensing device
US8561854B2 (en) 2005-08-01 2013-10-22 Rich Products Corporation Dispensing device for viscous materials
WO2007015720A1 (en) * 2005-08-01 2007-02-08 Rich Products Corporation Dispensing device
GB2475955A (en) * 2009-11-18 2011-06-08 Martin Richard Housden Hand held dispenser
GB2475955B (en) * 2009-11-18 2012-08-08 Martin Richard Housden Dispenser
ES2424895A1 (en) * 2012-04-03 2013-10-09 Salvador Cabeza Sanchez Cartridge for masses of two components with premixed in nozzle. (Machine-translation by Google Translate, not legally binding)
WO2017218952A1 (en) * 2016-06-16 2017-12-21 Sigma Phase, Corp. System for providing a single serving of a frozen confection
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US11278110B2 (en) * 2017-12-21 2022-03-22 The Boeing Company Methods for dispensing a brushable substance onto a surface
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US11827402B2 (en) 2021-02-02 2023-11-28 Coldsnap, Corp. Filling aluminum cans aseptically
EP4151321A1 (en) * 2021-09-21 2023-03-22 Hilti Aktiengesellschaft Supporting structure with varying inside diameter for pressure-free extrusion of a multicomponent compound from a coaxial cartridge
US11858716B2 (en) 2021-09-21 2024-01-02 Hilti Aktiengesellschaft Support structure having varying inner diameter for pressing a multi-component composition out of a coaxial cartridge without restoring force

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