Cartridge for a pressing device

Abstract

The present invention relates to a cartridge (10) for an applicator device, said cartridge comprising at least one elongate film bag (18) which is not inherently rigid and which has a chamber (20) for receiving a compound (102), a head part (12) for interacting with the film bag (18), and an inherently rigid insert (16) which is connected to the film bag (18) on a side facing the head part (12), wherein the insert (16) is arranged at least in some regions radially within the head part (12), and wherein a connection device (200) is provided, by which the insert (16) is connectable to the head part (12) in a form-fitting or force-fitting manner. The insert (16) has at least a first connection element (201) of the connection device (200) and the head part (12) has at least a second connection element (202) of the connection device (200), wherein the insert (16) cooperates in the longitudinal direction (L) in a connection region (204) with a surface (208) of the head part (12), which is directed to the inside at least in some regions in the radial direction (R), via a surface (206), which is directed to the outside at least in some regions in the radial direction (R). The surface (206) of the insert (16) and the surface (208) of the head part (12) have in the connection region (204) in an area facing away from the head part (12) in the longitudinal direction (L) a greater diameter than in an area facing the head part (12) in the longitudinal direction (L).

Description

[0001] The present invention relates to a cartridge for a dispensing device according to the type described in more detail in the preamble of claim 1.

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

[0003] Cartridges are known that have a non-rigid foil pouch connected at one end to a rigid insert. This rigid insert can be connected to a head section, to which, for example, a static mixer can be attached. The insert is attached to the head section, for example, by means of an adhesive bond.

[0004] From EP 3 834 951 A1, a cartridge with a rigid insert is known, which can be arranged on a head section by means of a snap-fit ​​device. In this design, the sealing effect between the head section and the insert may not be sufficient or may require additional measures. From DE 102 50 715 A1, a cartridge according to the preamble of independent claim 1 is known.

[0005] The object of the invention is to provide a cartridge in which an improved seal between the insert and the head can be achieved in a simple and cost-effective manner.

[0006] The problem is solved by the subject matter of the independent claim. Advantageous embodiments relating to the subject matter of the independent claim are found in the dependent claims.

[0007] A cartridge for a dispensing device is proposed, comprising at least one non-rigid, elongated foil bag having a chamber for receiving a mass, a head section for interacting with the foil bag, and a rigid insert connected to the foil bag on a side facing the head section, wherein the insert is arranged radially at least partially within the head section, and a connecting device is provided by means of which the insert can be positively and / or force-fit connected to the head section, wherein the insert has at least one first connecting element of the connecting device and the head section has at least one second connecting element of the connecting device.and wherein the insert in a connection area interacts by means of a first surface facing outwards in a radial direction at least partially with a surface of the head part facing inwards in a radial direction at least partially, wherein the first surface of the insert and the second surface of the head part in the connection area have a larger diameter in a region facing away from the head part in the longitudinal direction than in a region facing towards the head part in the longitudinal direction, wherein the insert and the head part are conically shaped in the connection area.

[0008] According to the invention, it is proposed that an angle of 1 to 15° exists between the surface of the insert and the surface of the head part in the connection area and the longitudinal direction in the cross-section.

[0009] A cartridge designed according to the invention has the advantage that a particularly good seal between the head and the foil bag or the insert is achieved in a structurally simple and cost-effective manner. Because the first surface of the insert and the second surface of the head have a larger diameter in the connection area in a region facing away from the head in the longitudinal direction than in a region facing the head in the longitudinal direction, a good and secure fit between the insert and the head is achieved, with a correspondingly good seal, particularly during pressure exerted on the foil bag in the direction of the head during a dispensing process and during the resulting displacement of the insert towards the head by radially outwardly acting forces.

[0010] Furthermore, when pressure is applied to the foil bag by a piston of a pressing device in the longitudinal direction towards the head part, the insert is pressed more strongly against the head part with an improved sealing effect.

[0011] A particularly good seal is achieved when the diameter of both the head and the insert in the connection area increases steadily from a first end section, which faces away from the head in the longitudinal direction, towards a second end section, which faces the head in the longitudinal direction. The diameter profile in the longitudinal direction can be flexibly selected.

[0012] Preferably, the connecting device secures the insert to the head in the longitudinal direction in such a way that sufficiently large forces for sealing between the insert and the head are present over the first surface of the insert and the second surface of the head, even in an unloaded state.

[0013] The first surface of the insert and the second surface of the head section lie, particularly in certain areas, preferably almost completely in contact with each other when the film bag is unloaded, and thus, in particular, completely around the circumference. This large contact area between the insert and the head section results in a significantly enhanced sealing effect.

[0014] In an advantageous embodiment of a cartridge according to the invention, the insert and the head are essentially complementary to each other in the connection area. This allows for a large-area interaction between the insert and the head in a simple manner, resulting in a good sealing effect.

[0015] The angle is preferably between 2° and 10°. The angle is preferably identical for the insert and the headpiece, so that the largest possible interaction between the insert and the headpiece can be achieved.

[0016] The insert may have a convex shape in the connection area. Preferably, in this case, the head is radially concave on its inner surface, with the shape of the head being substantially complementary to the shape of the insert. It may also be provided that the head and / or the insert are partially concave, convex, or conical in the connection area. Depending on the specific shape of the head and the insert, a desired sealing effect can be achieved for the respective application.

[0017] In an advantageous embodiment of a cartridge according to the invention, the connecting device is designed to be detachable. This allows, for example, the easy replacement of defective components. Furthermore, a detachable connecting device can be designed to release under a defined force. This prevents damage to the head, the insert, and / or the foil bag, and a detached foil bag can then be reattached to the head or connector using the insert.

[0018] In a simple embodiment of the invention, the connecting device is designed as a snap-fit ​​connection, a latching connection, or the like. The first connecting element can, for example, be designed as a latching element that can engage with the second connecting element, which is designed as a counter-latching element, for example, in the form of a recess, or vice versa. In this way, a simple arrangement of the insert on the head is achieved, and the position of the insert in the longitudinal direction of the cartridge in an unloaded state can be determined particularly precisely and precisely relative to the head. With a suitable design of the snap-fit ​​connection, the foil pouch or the insert can be connected to the head using moderate joining forces, achieving the desired high holding forces.

[0019] It may be provided that the first connecting element of the connecting device has at least one locking lug, in particular several locking lugs, which interact with at least one recess of the head part.

[0020] The connecting device can, for example, have a fully circumferential locking lug that interacts with a corresponding mating element of the connecting device. It can be provided that the first or the second connecting element is designed as a locking lug and the second or the first connecting element as a mating element, for example in the form of a recess, a groove, a channel, a depression, or the like.

[0021] If a connecting element of the connecting device has a positioning element, the position of the insert relative to the head can be precisely defined in the circumferential direction, and in particular, rotation of the insert relative to the head can be easily prevented. The positioning element can, for example, be designed as a ridge or the like. If a connecting element is designed, for example, as a locking lug that extends almost completely around the circumference, the position of the insert relative to the head can be precisely defined in the circumferential direction by a second connecting element, designed, for example, as a recess with a ridge arranged between the ends of the recess in the circumferential direction. The positioning element interacts, for example, with at least one locking lug representing a mating element.

[0022] To reliably prevent the insert from rotating relative to the head, for example, the insert can have a multitude of locking lugs that engage with one or more recesses in the head. In this case, for instance, several ridges are provided that particularly reliably prevent the insert from rotating relative to the head.

[0023] If at least one locking lug has an interference dimension transverse to the longitudinal direction compared to at least one other connecting element of the head, a reliable seal between the insert and the head is easily achieved even when the film bag is unloaded, i.e., when no pressure is applied to the film bag by a piston of a dispensing device. This also applies to an already opened film bag in an unloaded state, since the necessary interaction between the insert and the head is achieved by the interference dimension of the at least one locking lug.

[0024] It has been shown that an interference fit of less than 1% in the area of ​​at least one locking lug, particularly in the range of approximately 0.6% of the diameter of the film bag, is advantageous. This reliably prevents undesirably high joining forces and plastic expansion of the head while still achieving a desired sealing effect. For a film bag with a diameter of approximately 50 mm, the interference fit is particularly less than or equal to 0.5 mm, preferably approximately 0.3 mm. By providing this interference fit, a tight seal can be easily achieved when storing opened containers for a particularly long period, for example, for weeks. Thus, a seal between the insert and the container can be ensured not only when pressurized but also when unpressurized, and therefore across the entire pressure range occurring during operation.

[0025] In an advantageous embodiment of the invention, a region of the head section, which faces a base area of ​​the film bag and contains the second connecting element, is longitudinally spaced from a shoulder of the insert in an unloaded initial position. This allows movement of the insert relative to the head section in the longitudinal direction, particularly when force is applied to the film bag by a piston of a squeeze device. This simple design feature enables increased sealing when an external force applied to the film bag during a squeeze process is increased.

[0026] With a conical design of the insert and head with an angle greater than, for example, 5°, less displacement of the insert relative to the head is possible, resulting in correspondingly lower sealing forces, compared to a conical design of the insert and head with a small angle of, for example, less than 5°. It has been shown that the maximum displacement of the insert relative to the head when an external force is applied to the film bag should be less than 2 mm, and in particular less than 1 mm, as a large displacement can cause undesirable pumping effects. Furthermore, high forces and large displacements of the insert relative to the head, generated by small angles, can potentially lead to damage or failure of the insert or head, especially if it is made of plastic.

[0027] To easily seal the foil bag and prevent leakage from the material contained in one of the bag's chambers, the insert can have a passage sealed by a cover. The cover allows for a simple, safe, and, in particular, well-defined opening to dispense the material from the chamber.

[0028] Preferably, the film bag can be formed by a cylindrical film tube, which is closed at the bottom by a base section, wherein the base section is particularly bonded and / or welded to the film tube. The film tube, also called tubular film or blown film, can be made of a thermoplastic material, wherein the film tube can be extruded or welded or bonded along its longitudinal seam. Since the base section is particularly bonded and / or welded, a material-bonded connection is created, which improves the storage properties of the cartridge, thus reducing the leakage rate of the cartridge compared to a cartridge in which a film bag is closed by a clip closure.

[0029] In an advantageous embodiment of a cartridge according to the invention, the head section is designed to connect at least two inserts. Accordingly, two film pouches, particularly those not inherently rigid, can be connected to the head section, and the film pouches may have different masses. The head section is preferably designed such that the different masses can be guided separately from one another in the area of ​​the head section up to the dispensing opening, so that the different masses can only come into contact after the dispensing opening. This is important, for example, for two-component adhesives.

[0030] The cartridge can therefore hold different masses and serve as multi-component packaging. It can be designed so that the outlet openings assigned to the individual foil pouches have different diameters, allowing for easy adjustment of the desired mixing ratio of the different masses.

[0031] The masses contained in the cartridge can be a chemical mass or a liquid, for example components of a two-component mixture.

[0032] This allows for the storage of various products, including sealants, multi-component mortars, multi-component coatings, multi-component paints, multi-component foam precursors, multi-component adhesives, multi-component sealants, and multi-component lubricants, in the corresponding cartridges. It is possible to store a resin, such as an epoxy resin, in one chamber and a hardener for a two-component adhesive in another. The foil pouches can be of comparable lengths, in which case the desired mixing ratio is determined by the ratio of their base areas. Alternatively, two foil pouches of different lengths can be used.

[0033] The head section can be equipped with a spreading space into which the cover can expand. This spreading space allows for controlled opening of the cover, ensuring that it does not impede the flow of the outgoing material. This results in laminar flow, as there are no obstacles in the flow path that could cause turbulent flow. Furthermore, it ensures that the flow rate, which is crucial for the mixing ratio of two or more components, is precisely maintained.

[0034] A "self-stiffening component" is understood to be a component that retains its shape if it is removed from a fixture. Such a component is also referred to as inherently stable.

[0035] The head part, in particular, represents a kind of adapter, as it allows commercially available attachments or standardized dispensing devices to be used for applying the compound contained in the cartridge.

[0036] In one embodiment, the head section has an outlet nozzle that is in fluid communication with the intake. The outlet nozzle can define the flow rate, in particular via its diameter.

[0037] The dispensing nozzle may be designed with a thread. This thread allows standard applicators or dispensing devices for applying the compound contained in the cartridge to be precisely attached to the nozzle's opening, thus enabling accurate positioning and dispensing of the compound during application.

[0038] Similarly, the outlet nozzle can have a partition that divides the volume into two or more outlet channels. The relative position of the partition within the outlet nozzle defines the cross-sections of the outlet channels and thus the flow rates through these outlet channels.

[0039] The outlet channels can have different diameters. The outlet channels can be oriented coaxially to each other.

[0040] In one embodiment, the passage tapers conically. This allows the passage to act as a confuser or nozzle when the material flows out. Similarly, the conical passage can act as a diffuser when filling the foil bag.

[0041] The foil bag is preferably designed to fold evenly lengthwise during the pressing process, similar to an accordion, so that as much of the material in the chamber as possible can be used. During use, the foil bag is exposed to chemical substances or liquids that can sometimes attack it. Therefore, the exact composition of the foil bag must sometimes be adapted to the specific substance or liquid in the chamber, particularly its material properties.

[0042] Further advantages will become apparent from the following description of the figures. The figures illustrate an embodiment of the present invention. The figures, the description, and the claims contain numerous features in combination. A person skilled in the art will expediently consider the features individually and combine them into meaningful further combinations.

[0043] In the figures, identical and similar components are numbered with the same reference symbols. They show: Fig. 1 shows a longitudinal section through a cartridge designed according to the invention in an exploded view; Fig. 2 shows a simplified sectional view of a section of the cartridge according to the invention. Fig. 1 in mounted position, showing in more detail the connection of the foil bag to an insert on a head part; Fig. 3 a simplified sectional view of the cartridge according to Fig. 1 and Fig. 2 in an unloaded state, showing in more detail the area of ​​interaction between the insert and the head; Fig. 4 Fig. 3 corresponding section of the cartridge according to Figs. 1 to 3 , wherein a state is shown when the foil bag is subjected to external force by a piston of a dispensing device; and Fig. 5 a simplified three-dimensional representation of the cartridge insertion according to Figs. 1 to 4in a unique position. Example implementation:

[0044] Fig. 1 shows a cartridge 10 in an exploded view in a longitudinal section.

[0045] The cartridge 10 includes a head 12, two covers 14, two inserts 16 and two foil bags 18.

[0046] The foil bags 18 are not inherently rigid and each has a cylindrical and essentially elongated shape. Each foil bag 18 defines a chamber 20, with the insert 16 defining an opening 22. The chamber 20 can be sealed, in particular, by the foil bag, the insert 16, and the cover 14. The two foil bags 18, as well as the inserts 17'6 and the covers 14, differ in their dimensions and diameters, but are comparable in their construction. For example, the cross-sections of the foil bags 18 have a cross-sectional area ratio of 1:3 or 1:5, whereby the cross-sectional area ratio of the foil bags 18 can, in principle, be chosen arbitrarily. Furthermore, the foil bags 18 have an essentially comparable length in the longitudinal direction L.

[0047] In the embodiment shown, 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 encircling the base surface 28. The film tube 26 is attached to the outside of the collar 30 by welding or gluing. Alternatively, the film tube 26 can also be attached to the inside of the collar 30 by welding or gluing.

[0048] The film tube 26 can, for example, be manufactured from a film by gluing or welding the edges. It may also be possible to use a pre-made film tube or a pre-made film bag.

[0049] The base 28 is, for example, circular, so that the chamber 20 is cylindrical. In principle, however, any shape for the base 28 is conceivable, for example rectangular or polygonal.

[0050] The insert 16 is self-rigid and is inserted at least partially into the corresponding chamber 20 of an associated film bag 18 through the opening 22 on the inside, wherein the film tube 26 can be attached to the insert 16 on the outside, particularly by means of a welding process. The cover 14 is preferably also attached to the insert 16 by means of a welding process.

[0051] The in Figs. 2 to 5 The insert 16, which can be seen in more detail, has a curved course on one of the inner sides 38 facing the chamber 20, so that the chamber 20 tapers towards the head part 12.

[0052] The insert 16 has a surface 46 on a side facing the head section 12 in the longitudinal direction L, to which the cover 14 is attached. The surface 46 is inclined with respect to a transverse direction perpendicular to the longitudinal direction L, so that the insert 16 is conical in this area. The surface 46 facing the head section 12 forms an angle of, for example, approximately 15° - 35° with the horizontal H.

[0053] The inner side 38 of the insert 16, facing the chamber 20, encloses a passage 60 which tapers towards the head part 12.

[0054] Basically, the insert 16 is designed in a ring shape, so that it can be coupled with the cylindrical foil tube 26.

[0055] The inner side of the foil tube 26 is connected to the insert 16, with the foil tube 26 being attached to an outer side 42 of the insert 16 in the horizontal direction H. Preferably, the foil tube 26 is welded or glued to the insert 16.

[0056] The cover 14 is provided between the head section 12 and the insert 16, as shown in Fig. 1 The cover 14 rests against the surface 46 in radially outer areas of the assembled cartridge 10.

[0057] The cover 14 is connected to the insert 16, for example by welding or gluing, and closes the passage 60. Accordingly, the cover 14 closes the chamber 20, so that the chamber 20 is preferably completely sealed when the cover 14 is installed.

[0058] In the Fig. 1In the illustrated embodiment, the head part 12 has two receptacles 66, each of which can be connected to an insert 16 with a receptacle 66.

[0059] The recording 66 further includes an extension area 74, which is designed as a depression in the recording 66 and, as shown in Fig. 1 It can be seen that it forms a propagation space 74, which has a strain height of 90.

[0060] The head section 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 spreading chamber 74 and the receiving chamber 66 via the outlet channel 80.

[0061] The in Fig. 1The illustrated outlet nozzle 76 has two outlet channels 80 which are in fluid communication with the respective receptacle 66 and are separated from each other by a partition 82, which extends from a connecting web 84 separating the receptacles 66 to the outlet opening 78.

[0062] It may be provided that the two outlet channels 80, as in Fig. 1 shown, have different cross-sections, in particular different diameters, in order to set a desired mixing ratio of the masses contained in the individual foil bags 18.

[0063] The outlet nozzle 76 also has a thread 86, through which a non-visible attachment can be fastened to the outlet opening 78 of the head part 12.

[0064] For the positive locking connection of the insert 16 to the head part 12, a Figs. 2 to 5A connecting device 200, as shown in more detail, is provided. For this purpose, the insert 16 has at least one first connecting element 201 designed as a locking lug, and the head part 12 has at least one second connecting element 202 designed as a counter-locking element. The at least one second connecting element 202 is designed in this case as a recess or groove in the head part 12 and is designed in particular to be complementary to the connecting element 201 designed as a locking lug, but can, for example, also be designed in the form of a uniform groove.

[0065] By means of the connecting device 200, the insert 16 or the foil bag 18 can be easily fixed to the head part 12 in the assembled state.

[0066] For example, in Fig. 5As can be seen more clearly, the insert 16 in this case has a single connecting element 201 that completely surrounds in the circumferential direction and is designed to interact with a completely circumferential recess or groove 202 of the head part 12.

[0067] In an alternative embodiment, the insert 16 may also have several connecting elements distributed around its circumference, for example, six locking lugs, which interact with a corresponding number of grooves or recesses in the head. The relative positions of the connecting elements can be coordinated and distributed evenly or unevenly around the circumference. An uneven distribution has the advantage that the insert 16 can only be connected to the head 12 in a defined circumferential position, thus enabling precise alignment.

[0068] The connecting device 200 according to Fig. 5 The locking lug 201 is designed to be releasable, meaning it can be reversibly engaged with the recess 202 of the head 12. The locking lug 201 can be designed to fit the shape of the head 12 in the area of ​​the recess 202 such that, when a force acting in the longitudinal direction L away from the head 12 exceeds a defined limit value, the locking lug 201 releases from the recess 202 of the head 12. This prevents damage to the head 12, the insert 16, and the foil bag 18, and allows the insert 16 with the foil bag 18 to be reattached to the head 12.

[0069] The insert 16 acts in the unloaded state of the foil bag 18 according to Fig. 2 and Fig. 3, i.e., without an extreme force acting on the foil bag 18 by a piston of a pressing device, in a longitudinally extending connection area L 204 by means of a first surface 206 directed at least partially outwards in the radial direction R with a surface 208 of the head part 12 directed at least partially in the radial direction R inwards.

[0070] The insert 16 is conically shaped in the area of ​​the first surface 206, with the insert 16 having a larger diameter in the area facing the bottom part 24 than in the area facing the head part 12. Similarly, the head part 12 is radially conical on its inner side in the area of ​​the receptacle 66 in the connection area 204, with the second surface 208 of the head part 12 having a larger diameter in the connection area 204 in the area facing the bottom part 24 than in the area facing the head part 12 in the longitudinal direction L. In the unloaded state of the film bag 18, the insert 16, with its first surface 206, rests against the second surface 208 of the head part 12, particularly over almost the entire connection area 204.

[0071] The insert 16 and the head part 12 are essentially complementary to each other in the connection area 204, so that a large interaction area of ​​the insert 16 with the head part 12 is created.

[0072] The first surface 206 and the second surface 208 exhibit in cross-section according to Figs. 2 to 4 each at an angle 210 of 1 to 15°, in particular of 2° to 10°, especially preferably of 3° to 5° relative to the longitudinal direction L.

[0073] Furthermore, the connecting element 201, designed here as a locking lug, has an excess in the transverse direction L compared to the connecting element 204, designed as a recess, which is, for example, about 0.6% of the diameter of the foil bag 18.

[0074] This means that the maximum diameter of the connecting element designed as a locking lug 201, when not connected to the head 12, has a diameter 0.6% larger than the largest inner diameter of the head 12 in the area of ​​the connecting element 204, which is designed as a recess 204. This excess diameter ensures, when the insert 16 is connected to the head 12, both a secure hold and the desired compression even when the film bag 18 is unloaded, thus creating a reliable seal between the insert 16 and the head 12.

[0075] As in Fig. 2 and Fig. 3 In the unloaded state of the foil bag 18, a distance 214 exists in the longitudinal direction L between a lower end of the head part 12 in the area of ​​the receptacle 66 and a shoulder 212, which allows movement of the insert 16 relative to the head part 12.

[0076] If, for example, a force F in the longitudinal direction L towards the head part 12 acts on the foil bag 18 during a pressing process by a piston of a pressing device, the insert 16 is moved relative to the head part 12, as in Fig. 4 As can be seen more clearly, the insert is displaced in the longitudinal direction L towards the head part 12 or in a direction away from the base part 24. This increases the contact force between the insert 16 and the head part 12, thus increasing the sealing effect between the insert 16 and the head part 12 and reducing the risk of leakage of a mass contained in the foil bag 18 between the insert 16 and the head part 12 in the connection area 204.

[0077] In the case of a foil bag 18 with a diameter of about 50 mm, a preferred maximum displacement of the insert 16 relative to the head part 12 is in particular less than 2 mm, preferably about 1 mm.

[0078] 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, a cartridge may also have only one foil bag.

Claims

1. Cartridge (10) for a dispensing apparatus, having at least one non-inherently rigid elongate film pouch (18) which has a chamber (20) for receiving a material, having a head part (12) for interacting with the film pouch (18) and having an inherently rigid insert (16) which is connected to the film pouch (18) on a side facing the head part (12), the insert (16) being arranged radially inside the head part (12) at least in some regions and a connecting device (200) being provided, by means of which the insert (16) can be form-fittingly and / or force-fittingly connected to the head part (12), the insert (16) having at least one first connecting element (201) of the connecting device (200) and the head part (12) having at least one second connecting element (202) of the connecting device (200), and the insert (16), in the longitudinal direction (L) in a connection region (204), interacting, by means of a surface (206) which at least in some regions faces radially (R) outward, with a surface (208) of the head part (12) which, at least in some regions, faces radially (R) inward, the surface (206) of the insert (16) and the surface (208) of the head part (12), in the connection region (204), having a larger diameter in a region facing away from the head part (12) in the longitudinal direction (L) than in a region facing the head part (12) in the longitudinal direction (L), the insert (16) and the head part (12), in the connection region (204), being conical, characterized in that there is an angle (210) of 1 to 15° between the surface (206) of the insert (16) and the surface (208) of the head part (12) in the connection region (204) and the longitudinal direction (L) in the cross section.

2. Cartridge according to claim 1, characterized in that the angle (210) is between 2° and 10°.

3. Cartridge according to either of the preceding claims, characterized in that the insert (16) has a convex shape in the connection region (204) and the head part (12) has a concave shape in the connection region (204).

4. Cartridge according to any of the preceding claims, characterized in that the connecting device (200) is designed as a latching connection or a snap connection.

5. Cartridge according to any of the preceding claims, characterized in that the first connecting element (201) of the connecting device (200) has at least one latching lug which interacts with the second connecting element of the head part (12), which is designed in particular as a recess (202).

6. Cartridge according to claim 5, characterized in that the insert (16) has a plurality of latching lugs (201) which can be brought into engagement with one or more exceptions (202) in the head part (12).

7. Cartridge according to any of the preceding claims, characterized in that, transversely to the longitudinal direction (L), at least one first connecting element (201) of the insert (16) has an oversize relative to the at least one second connecting element (202) of the head part (12).

8. Cartridge according to claim 7, characterized in that the oversize is less than 1%, in particular less than 0.6%, of a diameter of the film pouch (18).

9. Cartridge according to any of the preceding claims, characterized in that a region of the head part (12) having the second connecting element (202) of the head part (12) and facing a base region (24) of the film pouch (18) in the longitudinal direction (L) has, in an unloaded initial position, a distance (214) from a shoulder (212) of the insert (16) in the longitudinal direction (L) such that a movement of the insert (16) relative to the head part (12) in the longitudinal direction (L) is made possible.

10. Cartridge according to any of the preceding claims, characterized in that the insert (16) has a passage (60) which is closed by a cover (14).

11. Cartridge 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).

12. Cartridge according to any of the preceding claims, characterized in that the head part (12) is designed to connect at least two inserts (16).

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