CARTRIDGE AND METHOD FOR MAKING A CARTRIDGE

Description

[0001] The present invention relates to a cartridge for a squeezing device and a method for producing a cartridge.

[0002] Cartridges are primarily used for storing materials such as adhesives, sealants, mortar, paint, or lubricants. Furthermore, the material can be easily applied to an object via the cartridges, provided the cartridge is inserted into a suitable dispensing device. The dispensing device allows the material to be applied precisely. For example, a rod of the dispensing device presses against the base of the cartridge, compressing the volume of the cartridge and forcing the material inside out of an opening. An attachment can be attached to the cartridge to allow the material to be applied to the object in a controlled and precise manner.

[0003] Such a cartridge is known, for example, from DE 295 01 255 U1. The cartridge comprises a foil bag, each of whose ends is closed with a clip, and a head for receiving the foil bag. Furthermore, this cartridge has a piercing device with two piercing spades that pierce the foil bag to open it.

[0004] However, closing the film bag with clips is disadvantageous because, depending on the type of material used, a certain amount of leakage is released to the outside. This occurs due to capillary forces that push the enclosed material outward through the clips, or due to excess pressure within the film bag, which can occur at elevated temperatures. Furthermore, the opening process for the film bag is complex in terms of design and may lead to an undefined opening of the film bag.

[0005] EP 2 511 194 A2 discloses a film cartridge comprising a film tube circumferentially enclosing at least one chamber. A lid separate from the film tube is provided, which closes off one axial end of the film tube. At least one first opening is formed in the lid for each chamber, through which the chamber can be filled with a filling material. Once the chambers are completely filled, the first openings are closed with closures. The closures can be in the form of a film with a weakened zone.

[0006] The object of the invention is to provide a cartridge with greater rigidity. Furthermore, the object of the invention is to provide a method for producing such a cartridge.

[0007] The problem is solved by the subject matter of the independent claims. Advantageous embodiments of the subject matter of the independent claims can be found in the dependent claims.

[0008] A cartridge for a squeezing device is proposed, comprising at least one elongated film bag of non-inherently rigid design, which has a chamber for receiving a mass and a head part for interacting with the film bag, wherein the film bag has an opening on a side facing the head part, which opening is closed by a cover, wherein the cover has a predetermined breaking region. According to the invention, it is proposed that an inherently rigid insert be provided, which is connected to the film bag on the side facing the head part and has a passage, wherein the cover is connected to the insert and closes the passage.

[0009] The inherently rigid insert gives the film bag greater rigidity in the area of ​​the cover, and the insert makes it easy to connect the cover to the rest of the film bag.

[0010] One advantage of the invention is to provide an improved cover that is easy to handle. On the one hand, the cover securely seals the foil bag and prevents unwanted leakage of the compound contained in the chamber. On the other hand, the cover enables a simple, secure, and particularly defined opening for dispensing the compound contained in the chamber. The predetermined breaking area improves the opening properties, particularly for cartridges used in a dispensing device.

[0011] The predetermined breaking point in the cover allows the cartridge to be opened in a precise manner using a dispensing device with comparatively low forces. At the same time, the cover can be easily constructed to be so stable that it reliably prevents the cartridge from opening itself, for example, if accidentally dropped. Furthermore, the cover makes it easy to minimize or completely prevent leakage of the material contained in the cartridge, significantly reducing this risk compared to conventional cartridges.

[0012] The cover is designed in particular as a film, but can alternatively also be designed in the form of a plate and, for example, represent a plastic plate.

[0013] The predetermined breaking area can easily have any shape and, depending on the application, can be round, oval, square, rectangular, angular or linear, or a combination of these shapes.

[0014] The chamber of the cartridge can be completely or exclusively enclosed by foil.

[0015] An "inherently rigid component" is a component that retains its shape when removed from a fixture. Such a component is also referred to as inherently stable.

[0016] In an advantageous embodiment of a cartridge according to the invention, it is provided that the cover in the predetermined breaking area has a defined material discontinuity at least in some regions, in particular in an entire flat area, than in a further region of the cover. The cover is structurally simple and can be produced inexpensively, whereby a safe and defined opening of the cover in the predetermined breaking area is enabled. The defined material discontinuity can be formed, for example, in that the cover in the predetermined breaking area has an increased or reduced material thickness at least in some regions than in a further region of the cover. This enables a safe and defined opening of the cover in the predetermined breaking area. Such a cover is also simple and cost-effective to produce.

[0017] The predetermined breaking point of the cover can also have a different material strength than another area of ​​the cover. This also enables safe and defined opening of the cover in the predetermined breaking point.

[0018] An additional area of ​​the cover is understood here to be an area of ​​the cover that is not assigned to the predetermined breaking area and extends outside the defined predetermined breaking area. The additional area of ​​the cover preferably has essentially constant material properties.

[0019] In an advantageous and particularly cost-effectively manufactured embodiment of a cartridge according to the invention, the predetermined breaking area of ​​the cover is delimited by a linear material weakening. The linear material weakening encompasses the predetermined breaking area, in particular completely, and thus separates the predetermined breaking area from the further area of ​​the cover. The linear material weakening can be either a continuous, in particular uniform, material weakening or a perforation, whereby the material thickness or the material strength of the linear material weakening can be either lesser or greater than the material thickness of the further area of ​​the cover.

[0020] In order to achieve a defined opening of the cover in use, an advantageous embodiment of the invention provides for the predetermined breaking area of ​​the cover to have a material strength that is different from that of another area of ​​the cover. It can be provided that the predetermined breaking area, either entirely or in a region linearly encompassing the predetermined breaking area, has a different strength or a different microstructure than that of the other area of ​​the cover. This can be achieved, for example, by the influence of temperature, in particular by means of a laser or energetic radiation.

[0021] The predetermined breaking area of ​​the cover can preferably have a notch that is star-shaped, cross-shaped, line-like, circular, semicircular, or similar. The special geometry of the notch allows for adjustment of the pressure required to open the cartridge. Furthermore, the opening characteristics can be influenced by the shape and spatial arrangement of the notch.

[0022] In an advantageous embodiment of the invention, the insert is conical on a side facing the head part. This makes it possible to provide a cartridge with a simple design in which a cover connected to the insert can be easily and securely fastened to the insert under all conditions and remains securely in place. Furthermore, undesired peeling or shearing and / or damage to the cover, which can be designed as a film, for example, is reliably prevented due to the favorable force introduction. The conical design of the insert means that in the event of a pressure increase in the chamber before opening, the notch effect in the area where the cover connects to the insert is minimal, and the cover is reliably opened in the area of ​​the predetermined breaking point when the cover or film expands due to pressure being applied during a pressing process.

[0023] It has proven particularly advantageous if a surface of the insert facing the head part forms an angle of between 10° and 50° with a horizontal line perpendicular to a central axis of the film bag, with a region of the surface facing the central axis being at a greater distance from a bottom part of the film bag than a region of the surface facing away from the central axis. The angle is particularly preferably between 15° and 35°, in particular approximately 25°.

[0024] In order to be able to fill the film bag particularly quickly and to reliably enable the air present in the film bag to escape, the insert can have at least one vent opening that is independent of the passage and / or at least one vent slot that is independent of the passage. The passage is in particular circular and, during a filling process of the film bag, preferably lies at least approximately tightly against a filling tube of a filling device. Air in the chamber of the film bag can escape easily through the vent opening and / or the vent slot. After the filling process, the vent opening and / or the vent slot can be closed off by the cover, in particular in a sealing manner, so that any mass present in the chamber is sealed.

[0025] Alternatively or additionally, the passage of the insert can have at least one venting notch in a region facing the central axis of the film bag, so that during a filling process of the film bag with a filling device having a filling tube with a circular cross-section, air in the chamber of the film bag can escape through the venting notches directly along the filling tube.

[0026] Both the provision of the vent opening or vent slot and the provision of vent notches prevent the occurrence of high pressures during a filling process, which makes the filling process cost-effective.

[0027] Preferably, a plurality of vent openings and / or vent slots are provided, which are arranged in particular uniformly distributed on the circumference of the insert.

[0028] In a structurally simple embodiment of the invention, the vent openings have a substantially circular cross-section. The vent slots are preferably arranged substantially concentrically to a central axis of the insert.

[0029] The venting notches may have a substantially rectangular, triangular, curved or similar shape.

[0030] In an advantageous embodiment of a cartridge according to the invention, the insert and the head part have a cooperating and essentially diametrically opposed contour in mutually facing regions, with the cover arranged in the region of the contours being designed to be weldable. In this way, the cover can preferably not only be connected to the insert using a welding process, but the insert can also be connected to the head part using the cover, alternatively or additionally, using a welding process.A welding tool provided for this purpose preferably has a cylindrical recess that substantially corresponds to the film bag and can be guided around the film bag from a side facing away from the head part in the direction of the insert. The welding tool is designed to heat the cover at least in the area of ​​the contours of the insert and the head part in such a way that the insert can be welded to the head part by means of the cover. The welding tool preferably surrounds the respective film bag on the outside.

[0031] The film bag can preferably be formed by a cylindrical film tube that is closed at the bottom by a base part, wherein the base part is in particular glued and / or welded to the film tube. The film tube, also called tubular film or blown film, can be formed from a thermoplastic material, wherein the film tube can be extruded or welded or glued along its longitudinal seam. Since the base part is in particular glued and / or welded, a material-to-material bond is created, which improves the storage properties of the cartridge, so that the leakage rate of the cartridge is reduced compared to a cartridge in which a film bag is closed by a clip closure.

[0032] The cartridge, for example, has a head section that includes at least one receptacle for at least one insert. The head section represents a type of adapter, as it allows commercially available attachments or standardized dispensing devices to be used to apply the compound contained in the cartridge. The insert, which partially extends beyond the foil bag, thus represents an interface to the head section.

[0033] The insert can be provided with a stepped raised portion on the side protruding from the foil bag, which secures the insert in the headpiece receptacle. This raised portion allows for a stable insertion of the insert in the headpiece receptacle. This also improves the seal during operation.

[0034] Likewise, the cover can rest against at least two surfaces of the stepped elevation, for example, essentially perpendicular to each other. This allows the cover to be securely attached to the insert at the bottom and to the headpiece's receptacle at the top. This also reduces leakage.

[0035] In one embodiment, the head part has an outlet nozzle that is in fluid communication with the receptacle. The outlet nozzle can define the flow rate, in particular via its diameter.

[0036] The outlet nozzle may be provided with a thread. This thread allows commercially available attachments or dispensing devices for applying the compound contained in the cartridge to be precisely attached to an outlet opening of the outlet nozzle, enabling precise positioning and dosing of the compound during application.

[0037] The outlet nozzle can also have a dividing wall that divides the volume into two or more outlet channels. The relative position of the dividing wall in the outlet nozzle defines the cross-sections of the outlet channels and thus the flow rates through these outlet channels.

[0038] The outlet channels can have different diameters. The outlet channels can be oriented coaxially to each other.

[0039] The head section can thus accommodate multiple film bags of different masses. The head section separates the different masses until the outlet opening, so that the different masses can only come into contact after the outlet opening. This is important, for example, for two-component adhesives.

[0040] The cartridge can thus accommodate different compounds and serve as a multi-component package. The different diameters of the outlet openings allow for a specific mixing ratio of the different compounds to be set.

[0041] The masses contained in the cartridge can be a chemical mass or a liquid, for example components of a two-component mixture.

[0042] Sealants, multi-component mortars, multi-component coating compounds, multi-component paints, multi-component foam precursors, multi-component adhesives, multi-component sealants and multi-component lubricants can be stored in the corresponding cartridges.

[0043] The head section can be assigned an expansion chamber into which the cover can expand. This expansion chamber allows for controlled opening of the cover so that it does not impede the flow of the escaping mass. On the one hand, this results in laminar flow, as there are no obstacles in the flow path that could cause turbulent flow. On the other hand, it ensures that the flow rate, which is important for the mixing ratio of two or more components, is precisely maintained.

[0044] In one embodiment, the passage is tapered. This allows the passage to act as a confuser or nozzle as the material flows out. The tapered passage can also act as a diffuser when filling the film bag.

[0045] The passage can be adapted to a filling cone of the mass in the chamber. This allows for optimal filling of the chamber with a mass, leaving little to no air in the chamber.

[0046] In one embodiment, the cartridge has at least one second, non-rigid, elongated foil pouch with a chamber for holding a compound. The cartridge can thus be used as a multi-component package. This allows a resin, such as an epoxy resin, and a hardener for a two-component adhesive to be stored in the same package.

[0047] The second foil bag can be the same length as the first foil bag, in which case the ratio of the base areas of the foil bags determines the desired mixing ratio. Alternatively, it is also possible to use two foil bags of different lengths.

[0048] The base part can be made of a plastic, such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and / or acrylonitrile butadiene styrene copolymer (ABS). The base part can be manufactured by injection molding, 3D printing, or machining. It can also consist of a preformed mono- or multi-layer film. The base part can be made of the same or a comparable material as the cover. This enables cost-effective production of the base part.

[0049] The film bag can comprise a mono- or multi-layer film. The total layer thickness is 50 to 350 µm, in particular 80 to 150 µm. The materials used can be PE, PP, PET, aluminum, ethylene-vinyl alcohol copolymer (EVOH), polyamide (PA), and / or polylactide (PLA). Each layer can also be coated with silicon oxide or aluminum oxide. The multi-layer film can be produced by adhesive or extrusion lamination.

[0050] The foil bag should preferably be able to be folded evenly during the squeezing process, similar to an accordion, so that as much of the material contained in the chamber as possible can be utilized. During use, the foil bag is exposed to chemical substances or liquids that can sometimes attack the foil bag. The exact composition of the foil bag must therefore sometimes be adapted to the mass or liquid contained in the chamber, especially to the corresponding material properties.

[0051] The cover can preferably be designed as a multi-layer film.

[0052] For example, the cover has a PE and / or PP layer on the top and bottom to allow it to be welded, for example, thermally welded, to other plastic parts of the cartridge. The film can also have PVC layers, especially if other plastic parts of the cartridge are made of PVC.

[0053] A barrier layer can be provided between the top and bottom of the cover, preventing, for example, the penetration of oxygen or water vapor into the chamber after the cover has been sealed. This can also reliably prevent outgassing of the mass contained in the chamber.

[0054] The total thickness of the cover can be between 50 µm and 350 µm. Specifically, the total thickness is intended to be between 130 µm and 250 µm.

[0055] The barrier layer may, for example, comprise aluminum or coatings of silicon oxide and / or aluminum oxide on PET, bi-axially arranged PP (BOPP), PA, PLA, or ethylene-vinyl alcohol copolymer (EVOH).

[0056] For chemically active masses, i.e. demanding filling materials, multilayer films are preferred.

[0057] In a further aspect, the invention relates to a method for producing such a cartridge for a squeezing device, by means of the following steps: Providing a film bag forming a chamber with an opening, filling the chamber with a mass through the opening, closing the opening with a cover, and producing a defined predetermined breaking area of ​​the cover.

[0058] The technical advantages described for the cartridge apply analogously to the proposed method for manufacturing the cartridge. The production of the filled cartridge can be separated into different manufacturing steps. In particular, the production of the foil bag is separated from the filling of the foil bag and the attachment of the foil bag to the head section.

[0059] The modular design of the cartridge allows for the individual elements to be adapted to the different cartridge requirements imposed by the mass in the chamber. Separating the production of the film pouch from the filling process reduces the complexity of cartridge manufacturing. This ensures better quality, as different machines and materials can be used for production and filling.

[0060] The predetermined breaking area of ​​the cover can, for example, be created before the film bag is manufactured, after the film bag is manufactured, or during the film bag is manufactured. The predetermined breaking area is preferably only introduced into the cover after the mass has been filled into the chamber and the chamber has been closed with the cover. In this respect, material of the cover is removed from an outer side facing away from the chamber, for example, in order to form the predetermined breaking area. The predetermined breaking area can, however, also be created before the cover is attached to the chamber. This also makes it possible to form the predetermined breaking area on an underside of the cover facing the chamber, or to form two opposing predetermined breaking areas on the bottom and top.

[0061] In an advantageous embodiment of a method according to the invention, it is provided that the film bag has a film tube and a base part, wherein the film tube is preferably formed by welding or gluing.

[0062] In an advantageous embodiment of a method according to the invention, the base part and a dimensionally stable insert are connected to the film tube, thus creating a film bag comprising a chamber defined by the film bag, the insert, and the base part, with the insert having a passage. The base part can be designed, for example, with a film or a dimensionally stable material.

[0063] In an advantageous embodiment of a method according to the invention, the predetermined breaking area of ​​the cover is produced by means of a laser, material weakening through hot stamping or thermal stamping with a heated stamp, by scoring with a suitable cutting tool or knife, or during a welding process of the cover to the insert. This makes it easy to achieve the predetermined breaking area, in particular with a different material thickness and / or strength than other areas of the cover, thus forming a defined predetermined breaking area.

[0064] When creating the predetermined breaking zone during the welding process of the cover to the insert, at least one welding parameter is preferably varied compared to the connection of the cover to the insert in other areas. For example, a higher pressure, an increased temperature, or an extended welding time, or a combination of these parameters, is used. The predetermined breaking zone is created in the immediate vicinity of the weld seam or in the weld seam itself.

[0065] In an advantageous embodiment of a method according to the invention, the insert has at least one material extension, in particular a material extension surrounding the passage, which melts during the closing of the passage. This improves the seal, as a material-to-material bond between the insert and the cover can be ensured due to the melt. The material extension can surround the passage of the insert. It acts as the intended melting point of the insert, thus providing a high-quality cover and preventing any material from escaping from the chamber through the opening.

[0066] In order to facilitate filling of the film bag and to reliably prevent the pressure in the film bag or in the chamber from becoming undesirably high during a filling process, the insert can have at least one venting notch, one venting opening and / or one venting slot through which air can escape during filling.

[0067] In an advantageous embodiment of a method according to the invention, a head part is provided which has at least one receptacle and the insert is inserted into the receptacle.

[0068] The head part allows the cartridge to be inserted into commercially available squeezing devices, which allows the cartridge to be squeezed out in a controlled manner when the mass in the chamber is applied to a corresponding object.

[0069] Furthermore, in an advantageous embodiment of a method according to the invention, a second film bag with a chamber can be provided. The second film bag can be designed analogously to the first film bag and connected to the head part. The connection is preferably made by gluing or welding. Accordingly, a multi-component package or cartridge can be produced in a simple manner.

[0070] It may be provided that different covers are provided for the different chambers.

[0071] In order to ensure that the chambers open as synchronously as possible during the ejection process of the cartridge, the covers of the various chambers can be designed with different predetermined breaking areas, for example different notches.

[0072] Further advantages will become apparent from the following description of the figures. Various embodiments of the present invention are illustrated in the figures. The figures, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into useful further combinations.

[0073] In the figures, identical and similar components are numbered with the same reference numerals. They show: Fig. 1a longitudinal section through a cartridge according to the invention in a first embodiment in exploded view; Fig. 2aa detailed view of the insert from Fig. 1 with a cover designed as a film in a longitudinal section; Fig. 2b a detailed view of another embodiment of an insert for connecting a cover designed as a film according to Fig. 2a in a longitudinal section; Fig. 2c a detailed view of the insert according to Fig. 2b with a cover made of plastic plate; Fig. 3a a top view of the cartridge made of Figur 1 with the predetermined breaking area; Fig. 3b top view of the cartridge from Figur 1 with a further embodiment of the predetermined breaking area Fig. 4 a schematic comparison showing the chamber from Figur 1 with a chamber known from the prior art and compares its squeezing behavior; Fig. 5 a schematic representation of the inventive method for producing a cartridge according to the invention in a second embodiment; Fig. 6 a simplified cartridge and a filling device for filling a chamber of the cartridge according to Fig. 1 with a chemical mass; Fig. 7 a longitudinal section through and a plan view of an embodiment of the insert; Fig. 7a - 7c schematic plan views of further embodiments of the insert; Fig. 8 a plan view of a further embodiment of the insert; Fig. 9 a detailed view of a vent slot of the insert from Figur 8 ; Fig. 10 a plan view of a further embodiment of the insert; Fig. 11 a detailed view of a venting notch of the insert from Figur 10 ; Fig. 12 shows an alternatively designed cartridge in which a film tube and a base part are welded together; Fig. 13a shows a schematically shown structure of the cover; Fig. 13b shows a schematic structure of an alternatively designed cover; Fig. 14 shows a schematic structure of a further alternatively designed cover; Figs. 15 - 19 show sections of various designs of covers which differ from one another in the respective design of the predetermined breaking region; Fig. 20 shows a side view and a top view of a further embodiment of a cartridge with two film bags, wherein the film bags are jointly connected to the head part in a welding process; and Fig. 21 shows a side view and a top view of a further embodiment of a cartridge with two film bags, wherein the film bags are separately connected to the head part in a welding process. Ausführunusbeispiele:

[0074] Figur 1 shows a cartridge 10 in an exploded view in a longitudinal section.

[0075] The cartridge 10 comprises a head part 12, two covers 14, two inserts 16 and two foil bags 18.

[0076] The film bags 18 are not inherently rigid and each have a cylindrical and essentially elongated shape. The film bags 18 each define a chamber 20 and have an opening 22, wherein the chamber 20 can be sealed by the film bags 18, in particular in a sealing manner.

[0077] In the illustrated embodiment, the film bag 18 is formed by a base part 24 and a film tube 26. The base part 24 has a base surface 28 and a collar 30 extending around the base surface 28. The film tube 26 is attached to the collar 30 on the outside by welding or gluing. In principle, the film tube 26 can also be attached to the collar 30 on the inside by welding or gluing.

[0078] The film tube 26 can, for example, be made from a film by gluing or welding edge areas. It is also possible to use a prefabricated film tube or a prefabricated film bag.

[0079] The base area 28 is, for example, circular, so that the chamber 20 is cylindrical. In principle, however, any shape of the base area 28 is conceivable, for example, rectangular or polygonal.

[0080] The insert 16 is designed to be inherently rigid and is inserted at least partially into the corresponding chamber 20 of an associated film bag 18 through the opening 22.

[0081] Fig. 2a , Fig. 2b und Fig. 2c show different design variants of an insert 16 or a cover 14, wherein the inserts 16 are each provided for connection to a film bag 18.

[0082] The insert 16 according to Fig. 2a comprises three sections 32, 34 and 36 in one piece, which are arranged one on top of the other with respect to a longitudinal direction L of the film bag 18 or the cartridge 10, i.e., they each adjoin one another. The first section 32 is arranged on a side facing away from the head part 12 and the third section 36 is arranged on a side facing the head part 12. The first section 32 has, for example, a thickness D1 in the longitudinal direction L of in particular less than 4 mm, the second section 34 has a thickness D2 in the longitudinal direction L of in particular less than 5 mm and the third section 36 has a thickness D3 in the longitudinal direction L of in particular less than 5 mm.

[0083] An inner side 38 of the first two sections 32 and 34, facing the chamber 20, and a first region of the third section 36, which extends from the transition of the second section 34 to the third section 36 to a bend 40, has an angle α with respect to a vertical line V, which can assume values ​​from 0 to 45°. As a result, the chamber tapers toward the head part 12.

[0084] The inner side 38 of the third section 36 has, on a side facing the head part 12, above the bend 40, a second region which forms an angle β with respect to a horizontal line H arranged perpendicular to the longitudinal axis L. The angle β can have a value between 0° and 60°.

[0085] The insert 16 has an outer side 42 facing away from the chamber 20. The outer side 42 in the region of the third section 36 comprises two surfaces 44 and 46. The surface 46 is arranged in longitudinal section parallel to the horizontal H and thus to the base surface 28, whereas the surface 44 in longitudinal section has an angle δ with respect to the vertical or the longitudinal direction, but in an alternative embodiment can also be arranged substantially parallel to the vertical V.

[0086] Accordingly, the surfaces 44 and 46 may be arranged substantially perpendicular to each other in the longitudinal section.

[0087] Fig. 2b shows a further embodiment of the insert 16, which differs from the insert 16 according to Fig. 2a essentially differs in that the third section 36 has a conical region comprising the surface 46 and facing the head part 12. The surface 46 facing the head part 12 encloses an angle ε of 10-50°, particularly preferably of approximately 15° - 35°, with the horizontal H. The surfaces 44 and 46 are not arranged perpendicular to one another in the longitudinal section and enclose an obtuse angle here. Furthermore, the radially outer surface 42 in the region of the third section 36 is arranged essentially in the longitudinal direction L.

[0088] The Fig. 2c The insert 16 shown essentially corresponds to the insert 16 according to Fig. 2b , wherein the cover 14 in the embodiment shown is designed as a plastic plate.

[0089] The third section 36 of the inserts 16 according to Fig. 2a and 2bis set back from the second section 34 with respect to the outer side 42, with the third section 36 having a smaller outer diameter than the second section 34. This forms a stepped elevation 48 of the insert 16.

[0090] The third section 36 has a width 50 of 3 to 8 mm in the direction of the horizontal H and is offset inwards by a radial offset 52 of 2 to 4 mm relative to the second section 34.

[0091] On the surface 46 facing the head part 12 and thus facing upwards, which is substantially parallel to the horizontal H, a material extension 54 is provided which projects substantially perpendicularly from the surface 46 parallel to the horizontal H, i.e. in the longitudinal direction L. The material extension 54 has a predefined height 56, as will be explained below, and a width 58 of in particular less than 2 mm.

[0092] The outer side 42 in the region of the first section 32 has an angle γ of between 0 and 10° with the vertical V and the outer side 42 in the region of the third section 36 encloses an angle δ of 0 to 60° with the longitudinal direction L.

[0093] The inner side 38 of the sections 32, 34, 36 facing the chamber 20 encloses a passage 60 that tapers conically from the first section 32 toward the third section 36. Thus, the passage 60 has a larger opening 61 in the region of the first section 32 compared to the opening 63 in the region of the third section 36.

[0094] In addition, the insert 16 has a plurality of holes 62 in the third section 36, which are arranged between the material extension 54 and a radially inwardly pointing tip 64 of the third section 36 and here extend essentially in the longitudinal direction L.

[0095] Basically, the insert 16 is ring-shaped so that it can be coupled to the cylindrical film tube 26.

[0096] The inside of the film tube 26 is connected to the insert 16, with the film tube 26 being connected to the outside 42 in the region of the first section 32. Preferably, the film tube 26 is welded or glued to the insert 16.

[0097] Between the head part 12 and the insert 16, the cover 14 is provided, as can be seen from Fig. 1 In the assembled state of the cartridge 10, the cover 14 rests in radially outer regions on the stepped elevation 48, essentially on the two surfaces 44 and 46.

[0098] The cover 14 is connected to the insert 16, for example by welding or gluing, and closes the passage 60 and the holes 62. Accordingly, the cover 14 closes the chamber 20, so that the chamber 20 is preferably completely sealed when the cover 14 is in the assembled state.

[0099] In the Fig. 1 In the embodiment shown, the head part 12 has two receptacles 66 which, in the assembled state, interact with the inserts 16 and the cover 14. The receptacle 66 is divided into two areas, as can also be seen from the Fig. 3a can be seen.

[0100] In a support area 68, the receptacle 66 is adapted to the insert 16 and the stepped elevation 48, so that the insert 16, as in Fig. 1 can be seen, with the cover 14 rests against a side surface 70 of the receptacle 66, i.e. via its radially outwardly facing outer side 42, in particular in the region of the third section 36, and, as in Fig. 3a can be seen, rests on the support area 68, with the cover 14 in between.

[0101] Furthermore, the receptacle 66 comprises an expansion region 72, which is designed as a recess in the receptacle 66 and, as shown in Fig. 1 can be seen, forms a propagation space 74, the function of which will be explained later.

[0102] The head part 12 further comprises an outlet nozzle 76 with an outlet opening 78 and an outlet channel 80. The outlet opening 78 is in fluid communication with the expansion chamber 74 and the receptacle 66 via the outlet channel 80.

[0103] The Fig. 1 The outlet nozzle 76 shown has two outlet channels 80 which are in fluid communication with the respective receptacle 66 and are separated from one another by a partition 82 which extends from a connecting web 84 separating the receptacles 66 to the outlet opening 78.

[0104] It can be provided that the two outlet channels 80, as in Fig. 1 and Fig. 3a shown, have a different cross-section, in particular a different diameter, in order to adjust a mixing ratio of the masses, as will be explained below.

[0105] The outlet nozzle 76 further includes a thread 86 through which an attachment (not shown) can be attached to the outlet opening 78 of the head portion 12. This attachment can be part of a dispensing device into which the cartridge 10 can be inserted or placed.

[0106] The cover 14 includes a predetermined breaking area 88, which, when the cartridge 10 is connected to the head part 12, is arranged in the region of the expansion area 72 of the receptacle 66. In this case, the cover 14 has a lower material thickness or material strength in the predetermined breaking area 88 than in other areas of the cover. Due to the lower material thickness, the cover 14 is correspondingly weakened in certain areas in the predetermined breaking area 88.

[0107] The predetermined breaking region 88 can be created in the cover 14, for example, by a laser or by a heated stamp. The predetermined breaking region 88 can, for example, be created after the cover 14 has been arranged on the insert 16, preferably from a side facing away from the chamber 20. Alternatively or additionally, the predetermined breaking region 88 can also be created from a side of the cover 14 facing the chamber 20. For example, opposite regions on both sides of the cover 14 can be machined so that the predetermined breaking region 88 extends on both sides of the cover 14. The predetermined breaking region 88 can also be created by deforming material using a stamp or by melting material using a stamp.It can also be provided that material in the predetermined breaking area 88 is vaporized by means of a laser, particularly on a side facing away from the chamber 20, so that the predetermined breaking area 88 represents, for example, an externally visible notch in the cover 14. If the predetermined breaking area 88 is produced by hot stamping, the predetermined breaking area 88 is also visible from the outside. The predetermined breaking area 88 can also be produced by scoring. The predetermined breaking area 88 can also be created by the aforementioned methods before the cover 14 is attached to the insert 16.

[0108] Fig. 3b shows a similar view as Fig. 3a , whereby only the differences will be discussed below. The predetermined breaking area 88 is arranged in an area of ​​the expansion area 72 that faces the other film bag 18. In Fig. 3b a circumferential weld seam 89 is shown, by means of which the cover 14 is fixed to the surface 46 of the insert 16. The weld seam 89 is delimited in simplified form by two circles 91, 93, shown here by dashed lines, which run essentially concentrically to a longitudinal axis of the film bag 18, wherein the weld seam 89 here represents a partial area of ​​the surface 46. The predetermined breaking area 88 represents in the present case, for example, a section of the weld seam 89, wherein the predetermined breaking area 88 is at least partially, in particular completely, congruent with the weld seam 89. Alternatively, the predetermined breaking area 88 can also be located in the immediate vicinity of the weld seam 89. The predetermined breaking area 88 is created during the production of the weld seam 89 by varying the welding parameters.

[0109] The predetermined breaking area 88 is a targeted weakening of the cover 14, so that when the film bag 18 or the chamber 20 is squeezed out by a squeezing device, the cover 14 tears open in the predetermined breaking area 88 or opens there in a defined manner.

[0110] During the extrusion of the cartridge 10, the base part 24 of the chamber 20 is pressed towards the head part 12, for example by means of a plunger of a squeezing device. This leads to an increase in the pressure in the chamber 20, which is directed towards the cover 14, whereby the compound located in the chamber 20 is pressed against the cover 14. The cover 14 then expands into the expansion region 72. The predetermined breaking region 88 of the cover 14 is assigned to the expansion region 72, wherein the predetermined breaking region 88 breaks open above a certain force or a corresponding pressure, so that the compound can flow through the passage 60 of the insert 16 and the torn-open predetermined breaking region 88 from the chamber 20 into the outlet channel 80. The compound can thus flow out of the head part 12 through the outlet opening 78 and, for example, be applied to an object.

[0111] Since, after the chamber 20 has been completely pressed out, the mass located in the expansion space 74 and in the outlet channel 80 can no longer be pressed out of the outlet opening 78, the outlet channel 80 and the expansion space 74 should be kept as small as possible.

[0112] It has proven advantageous if the expansion region 72 associated with the chamber 20 has an area of ​​1-40% of the total area of ​​the respective receptacle 66 or 68, better 2-35%, and preferably 3-30%. The expansion height 90 of the expansion space 74 should be between 2.0 and 15.0 mm, in particular 3.0 and 12.0 mm, and preferably 5.0 and 10.0 mm.

[0113] The opening force required to break the predetermined breaking area 88 can be adjusted by changing the expansion area 72. Furthermore, it is also possible to adjust the opening force by appropriately arranging the predetermined breaking area 88 on the cover 14 or by adjusting the shape and size of the predetermined breaking area 88.

[0114] For example, the required opening force is increased if the predetermined breaking area 88 is displaced from a central area to an edge area of ​​the expansion surface 72.

[0115] The expansion region 72 and the predetermined breaking region 88 are selected such that the two chambers 20 break open at essentially identical opening forces, allowing the masses to flow out of the chambers 20 synchronously. Accordingly, a predetermined mixing ratio of the masses from the two chambers 20 can be achieved, which is determined by an area ratio of the base surfaces 28 or the division of the outlet channel 80 by the partition wall 82.

[0116] Fig. 4 shows a schematic comparison between the chamber 20 of the cartridge 10, which is located in the upper half of the Fig. 4 is arranged, and a chamber 92 of a cartridge 94 known from the prior art, which is arranged in the lower half of the figure, in a longitudinal section.

[0117] The left side of the Fig. 4 shows the cartridges 10, 94 in a filled state and the right side of the Fig. 4 the cartridges 10, 94 in a squeezed-out or emptied state.

[0118] When filled, the cartridges 10, 94 in the present example are enclosed by a cuboid 96 of equal volume, shown by dashed lines. A width B, a length L, and a height (not shown) of the two cuboids 96 are essentially equal here.

[0119] The chamber 92 of the prior art cartridge 94 is closed on both sides by clips 98. The clips 98 result in the chamber 92 being spherically closed at each end, so that the chamber 92 has a smaller volume than the cuboid 96 according to the cartridge 10 according to the invention. Accordingly, more mass can be filled into the chamber 20 than into the chamber 92.

[0120] The pressing out of the cartridges 10, 94, indicated by an arrow, results in the longitudinal sides of the chambers 20, 92 being compressed and bulging like an accordion.

[0121] The chamber 20 of the extruded cartridge 10 is enclosed by a cuboid 100. The cuboid 100 is smaller than the cuboid enclosing the extruded chamber 92 of the prior art, so that the extruded chamber 20 has a smaller volume than the extruded chamber 92 of the prior art. Accordingly, with the same available initial volume according to cuboid 96, the cartridge 10 can accommodate more mass than the cartridge 94 known from the prior art, and less mass remains in the cartridge 10 after extrusion compared to the cartridge 94 of the prior art.

[0122] Based on Fig. 5 and Fig. 6 The method for producing a cartridge 10 according to a further embodiment will now be described, which essentially corresponds to the embodiment described in more detail above, so that only the differences will be discussed below. Identical components are provided with the same reference numerals, and reference is made to the above explanations regarding their structure and function.

[0123] In contrast to the first embodiment, the cartridge 10 in Figur 5 only one chamber 20, so that only one insert 16, one cover 14, one receptacle 66, and one outlet channel 80 are present. Accordingly, no partition 82 is provided to divide the outlet channel 80 into sub-channels.

[0124] In a first process step (the steps are indicated by arrows), the base part 24 and the insert 16 are prepared. Subsequently, a film tube 26 is attached to the outside of the collar 30, for example, by gluing or welding, circumferentially around the base part 24, creating a film bag 18 having an opening 22. The film tube 26 can also be attached to the inside of the collar 30.

[0125] The inside of the opening 22 is then attached to the outside 42 of the insert 16 in the region of the first section by welding and / or gluing.

[0126] In a next, in Fig. 6 In the step shown, the chamber 20 is filled with a mass 102 through a filling device 104 having a filling head 106 and a filling tube 108. The filling head 106 and the filling tube 108 are in fluid communication with each other.

[0127] The filling head 106 is connected, for example, to a reservoir of the mass 102 and pumps the mass 102 from the reservoir into the filling head 106. The filling tube 108 projects through the opening 63 and the passage 60 of the insert 16 into the chamber 20, so that the mass 102 can be introduced from the filling head 106 through the filling tube 108 into the chamber 20.

[0128] During the filling process, the air in the chamber 20 can escape through the holes 62, so that the filling tube 108 can have the same cross-section as the opening 63 of the third section 36 of the insert 16. The mass 102 can thus be introduced into the chamber 20 through a large opening, so that little pressure is required for the filling process.

[0129] The geometry of the insert 16 is adapted to a filling cone 110 of the chemical compound 102. The geometry is particularly adapted to the filling cone 110 of viscous chemical mortar. This ensures that relatively little, and in particular no, air remains between the insert 16 and the chemical compound 102 after the filling process. This is advantageous because the presence of air can reduce the shelf life of the compound 102 and, in the case of larger air bubbles, can have an undesirable effect on the mixing ratio achieved when using two foil bags 18.

[0130] After the filling process, as in Fig. 5 shown, the cover 14 is attached to the insert 16.

[0131] In order to be able to tightly close the opening 63, a material extension 54 can be provided, which is designed to be circumferential and connected to the third section 36 of the insert 16 and can be annular. Several separate material extensions 54 can also be provided, which, for example, are designed to be partially annular and each extend only over a partial region of the circumference of the insert 16. The at least one material extension 54 serves as a melting point, so that the cover 14 and the insert 16 can be connected to one another in one piece, in particular by means of a material bond, by melting the material extension 54.

[0132] Furthermore, the cover 14 is also attached to the surfaces 44 and 46 of the insert 16. For example, the molten material of the material extension 54 flows along the surfaces 44, 46 to form a kind of adhesive layer for the cover 14.

[0133] The cover 14 can be designed as a monofilm. After the insert 16 is closed, a portion of the cover 14 is removed from the top side of the cover, creating a predetermined breaking area 88. This occurs, for example, when the chamber 20 is closed, by removing material from the cover 14 from the outside.

[0134] When the cover 14 is attached to the surface 46 of the insert 16 by welding, the predetermined breaking area 88 can be formed by a defined setting of the welding parameters within a predefined range. For example, a higher pressure, an increased temperature, or an extended welding time, or a combination of these parameters, can be provided to create the predetermined breaking area 88 during the welding process of the cover 14 to the insert 16. The predetermined breaking area 88 can be easily created in the immediate vicinity of or in the surface 46.

[0135] In a further process step, the head part 12 is provided, and the insert 16 with the cover 14 is secured in the receptacle 66. In particular, the surface 44 of the stepped elevation 48 rests against the side surface 70 of the receptacle 66. This process step can be performed, for example, by gluing or welding or a similar fastening method.

[0136] Fig. 7 shows in the upper area the insert 16 in a longitudinal section and in a lower area a corresponding top view of the insert 16.

[0137] From the top view according to Fig. 7 It can be seen that the holes 62 are arranged as vent openings 112 circumferentially around the opening 63 and have a diameter 114 of, in particular, less than 3 mm. In the present embodiment, the insert 16 has eight vent openings 112. In principle, any number of vent openings 112 can be provided. The vent openings 112 can be designed as vent holes.

[0138] Based on Fig. 8 bis Fig. 11 Further embodiments of holes 62 are shown.

[0139] The top view of the insert 16 according to Figur 8 shows that the holes 62 are designed as ventilation slots 116 which are arranged circumferentially around the opening 63, in particular at regular intervals from one another and / or coaxial with the central axis of the opening 63.

[0140] Fig. 9 shows a detailed view of one of the ventilation slots 116 from Fig. 8 . A width 118 of the ventilation slot 116 in the radial direction is in particular less than 3 mm and a length 120 in the circumferential direction is, for example, 1 to 20 mm.

[0141] In Fig. 10 It can be seen that the holes 62 can also be designed as venting notches 122. In this embodiment, the venting notches 122 function as an enlargement of the opening 63, the original shape of which is shown in dashed lines in the area of ​​the venting notches 122.

[0142] A detailed view of a vent notch 122 is shown in Fig. 11 from which it can be seen that a width 124 of the venting notch 122 in the circumferential direction has a value in particular of less than 4 mm.

[0143] Fig. 7a, Fig. 7b und Fig. 7c show further possible designs of inserts 16 for venting the film bag 18 during a filling process. A radially inner contour 123 of the insert 16 is in this case, in contrast to the design of the insert 16 according to Fig. 1 not circular. In Fig. 7a the inner contour 123 represents a particularly uniform polygon, here a dodecagon, in Fig. 7b a sine wave ring and in Fig. 7c a gear geometry. This allows air to escape through the opening 63 during a filling process with a cylindrical filling tube 108 without the need for holes 62 in the insert 16. These can be additionally provided in alternative designs of inserts 16.

[0144] Fig. 12 shows another possibility for producing the film bag 18. Instead of attaching the outer side of the collar 30 to the inner side of the film tube 26, the inner side of the collar 30 can also be attached to the outer side of the film tube 26, as already explained.

[0145] The cover 14 can be designed as a monofilm. Fig. 13a, Fig. 13b und Fig. 14 Embodiments of the cover 14 are shown in which the cover 14 is formed by several layers or by a plastic plate.

[0146] In the Fig. 13a The cover 14 comprises five layers. A middle layer is embodied as a barrier layer 126, for example in the form of an aluminum layer. The layers are numbered from top to bottom in the figures, so that the uppermost layer represents a first layer and a lowermost layer represents a fifth layer. A second layer and a fourth layer are each embodied as a polyethylene layer (PE layer) 128. The uppermost and lowermost layers, i.e., the first layer and the fifth layer of the cover 14, are each embodied as a polypropylene layer (PP layer) 130.

[0147] The barrier layer 126 prevents water vapor and / or oxygen from penetrating the chamber 20. Particularly with chemically active materials, water vapor and / or oxygen can cause the material arranged in the chamber 20 to react, thereby reducing its durability or changing its composition. Furthermore, the barrier layer 126 advantageously prevents the material located in the chamber 20 from outgassing.

[0148] In Fig. 13b An alternative structure of the cover 14 with five layers is shown. The middle layer is again designed as a barrier layer 126. In contrast to the design according to Fig. 13a In addition to the second layer and the fourth layer 128, the first layer and the fifth layer 130 are also made of polyethylene.

[0149] The design of the cover 14 in Fig. 14 again has five layers, with the barrier layer 126 forming the fourth layer. In this embodiment, the first layer, the third layer, and the fifth layer are each embodied as a PE layer 130. The second layer 132 represents a layer 132 of biaxially arranged polypropylene.

[0150] Alternatively, the cover 14 can be made of a particularly rigid plastic plate, preferably made of PE, PP, PET, PVC, ABS, PA, PLA or similar materials. The cover 14 is in turn bonded or welded to the insert 16 of the embodiment of the Fig. 2 or Fig. 2b connected to insert 16.

[0151] The designs of the cover 14 according to Fig. 13a, Fig. 13b und Fig. 14 are to be understood as examples only. In principle, any material mentioned above is possible for a layer of the cover 14, and any number of layers is also conceivable.

[0152] Based on Fig. 15 bis Fig. 19 Various embodiments of predetermined breaking regions 88 are shown below, which differ from one another in terms of their shape. All of these figures show a detailed view of a top view of the cover 14, with the predetermined breaking region 88 being shown in greater detail in each case.

[0153] In Fig. 15 The predetermined breaking region 88 is designed in several parts and, in this case, has eight sub-regions, each of which extends radially outward from a center point 134 to the center point 134, essentially in a straight line, so that the predetermined breaking region 88 forms a star-shaped pattern. The predetermined breaking region 88 thus represents a symmetrical, in this case point-symmetrical, pattern overall.

[0154] In Fig. 16 the predetermined breaking region 88 has four sub-regions, which in turn extend from the center point 134 essentially in a straight line in the radial direction outwards, so that the predetermined breaking region represents a cross-shaped pattern, which here is point-symmetrical to the center point 134.

[0155] The Fig. 17 The predetermined breaking area 88 shown is formed by a straight line.

[0156] In the design according to Fig. 18 The predetermined breaking area 88 is formed by a circular boundary, which can be designed as a continuous line or as a perforation. The line or perforation delimits the predetermined breaking area 88 from the further area of ​​the cover 14 lying outside the line or perforation.

[0157] In the execution according to Fig. 19 the predetermined breaking area 88 is defined by a substantially semicircular line, which in turn can be designed as a perforation or a continuous line.

[0158] Fig. 20 shows a side view and a top view of another embodiment of a cartridge 10 with two foil bags 18, wherein the foil bags 18 are connected to the head part 12 in a common welding process. The inherently rigid insert 16 is first connected to the foil bag 18 and then filled with a mass 102 through the passage 60. Subsequently, the passage 60 is closed with the cover 14, wherein the cover 14 is connected to the insert 16 in the manner described in more detail above and, in particular, is welded on.

[0159] The cover 14 is designed to be weldable on both sides, so that in a further step the film bags 18 are connected to the head part 12 in a welding process. This is possible in the design according to Fig. 20 for both film bags 18 with a common welding tool 136 and in the design according to Fig. 21 for each film bag 18 with two separate welding tools 138, 140 and thus independently of each other, wherein one welding tool 138 is assigned to one film bag 18 and the other welding tool 140 is assigned to the other film bag 18.

[0160] In this case, the inserts 16 have a corresponding counter-contour to the head part 12, so that the inserts 16, when connected to the head part 12, lie essentially flat against the head part 12 via the cover 14.

[0161] The respective Fig. 20 und Fig. 21 The welding tool 136, 138, 140, which is only shown schematically, is guided from a side facing away from the head part 12 over the film bags 18 to a contact area of ​​the head part 12 with the insert 16, wherein the welding tools 138, 140 weld the respective film bag 18 and the corresponding contours of the insert 16 and the head part 12 in the embodiment according to Fig. 21 completely encompass the circumference, so that a completely circumferential connection is created between the head part 12 and the film bag 18 via the cover 14. The connections of the two film bags 18 to the head part 12 can be carried out simultaneously, partially overlapping, or sequentially.

[0162] When executed according to Fig. 20The common welding tool 140, with which the connection of both film bags 18 to the head part 12 is possible in a single work step, comprises the film bags 18 circumferentially, for example, except for a mutually facing area of ​​the film bags 18, so that a connection is created between the head part 12 and the two film bags 18 via the respective covers, which completely surrounds the outside of both film bags 18. In this case, it can be provided that no connection of the inserts 16 to the head part 12 via the covers 14 is provided in a mutually facing area of ​​the two film bags 18.

[0163] To connect the head part 12 to the insert 16 or inserts 16, an inductive and contactless welding process, for example, a high-frequency welding process, is preferably provided. The cover 14 preferably has an aluminum layer that is heated during the welding process. The heat is conducted through the other layers of the cover 14 to the inserts, which are made in particular of plastic, and the head part 12, thereby achieving the weld. This achieves a very targeted energy input at the location where the welded connection is to be created.

[0164] The various configurations of the individual components are to be understood as examples. In particular, the various configurations and various features of the embodiments can be combined with one another as desired. The features and configurations listed as differences are independent and can be combined in various ways.

[0165] In the illustrated embodiments, the cartridge 10 comprises one or two chambers 20 and a corresponding number of covers 14, inserts 16, foil bags 18, receptacles 66 and outlet channels 80. In general, any number of the aforementioned components is possible.

Claims

1. Cartridge (10) for a squeezing device, the cartridge comprising at least one elongate film pouch (18) which is not inherently stiff and which has a chamber (20) for receiving a composition (102) and a head part (12) for interacting with the film pouch (18), the film pouch (18) having, on a side facing the head part (12), an opening (22), which is closed by a cover (14), the cover (14) having a predetermined breaking region (88), characterized in that an inherently stiff insert (16) is provided which is connected to the film pouch (18) on the side facing the head part (12) and has a passage (60), the cover (14) being connected to the insert (16) and closing the passage (60).

2. Cartridge (10) according to claim 1, characterized in that the cover (14) has, in the predetermined breaking region (88), a lower material thickness at least in regions than in a further region of the cover (14).

3. Cartridge (10) according to either claim 1 or claim 2, characterized in that the cover (14) has, in the predetermined breaking region (88), an increased material thickness at least in regions than in a further region of the cover (14).

4. Cartridge (10) according to any of the preceding claims, characterized in that the predetermined breaking region (88) of the cover (14) is delimited by a linear material weakening.

5. Cartridge (10) according to any of the preceding claims, characterized in that the predetermined breaking region (88) of the cover (14) has a material strength which is defined as different from that of another region of the cover (14).

6. Cartridge (10) according to any of the preceding claims characterized in that the insert (16) is conical on a side facing the head part (12).

7. Cartridge (10) according to any of the preceding claims, characterized in that the insert (16) has at least one vent opening (112) that is independent of the passage (60) and / or at least one vent slot (116) that is independent of the passage (60) and / or in that the passage (60) of the insert (16) has at least one vent notch (122) in a region facing the central axis of the film pouch (18).

8. Cartridge (10) according to any of the preceding claims, characterized in that the insert (16) and the head part (12) each have, in mutually facing region, an interacting and substantially diametrically opposed contour, the cover (14), which is arranged in the region of the contours, being weldable.

9. Cartridge (10) according to any of the preceding claims, characterized in that the film pouch (18) is formed by a cylindrical film tube (26) which is closed at the bottom by a base part (24), which is in particular glued and / or welded to the film tube (26).

10. Method for producing a cartridge (10) for a squeezing device according to any of claims 1 to 9, by means of the following steps: - providing a film pouch (18) which forms a chamber (20) and has an opening (22), - connecting an inherently stiff insert (16) to the film pouch, - filling the chamber (20) with a composition (102) through the opening (22), - closing the opening (22) by means of a cover (14), and - producing a defined predetermined breaking region (88) of the cover (14).

11. Method according to claim 10, characterized in that a base part (24) and a dimensionally stable insert (16) are connected to the film tube (26), thus producing a film pouch (18) which comprises a chamber (20) that is delimited by the film pouch (18), the insert (16) and the base part (24), the insert (16) having a passage (60).

12. Method according to claim 11, characterized in that the predetermined breaking region (88) of the cover (14) is produced by means of a laser, weakening by hot stamping, by scoring or by welding the cover (14) to the insert (16).

13. Method according to either claim 11 or claim 12, characterized by the following steps: - closing the passage (60) by means of a cover (14), - connecting the insert (16) to the head part (12) in a welding process, the welding process being carried out by introducing heat into the cover (14).

14. Method according to any of claims 10 to 13, characterized in that the insert (16) has at least one material extension (54), in particular a material extension (54) which surrounds the passage (60) and which melts during the closure of the passage (60).