EP2768619A1

EP2768619A1 - Multi-component cartridge

Info

Publication number: EP2768619A1
Application number: EP12748478.0A
Authority: EP
Inventors: Josef Ettlin
Original assignee: Sulzer Mixpac AG
Current assignee: Medmix Switzerland AG
Priority date: 2011-10-17
Filing date: 2012-08-20
Publication date: 2014-08-27
Anticipated expiration: 2032-08-20
Also published as: CN103998150A; WO2013056873A1; KR20140079410A; US20140158717A1; US9901946B2; EP2768619B1; CN103998150B

Abstract

The invention relates to a cartridge, comprising at least one receiving chamber (2) extending in the longitudinal direction for a medium to be discharged, a head part (4) and a cartridge wall (3), which delimit the receiving chamber (2), wherein a piston (8) is provided, which can be introduced into the receiving chamber (2) at the end that faces away from the head part (4) and can be displaced in the longitudinal direction along the cartridge wall (3) to form a seal, and wherein the cartridge wall (3) is made of a cardboard and is joined to the head part (4) in a sealed manner. The invention further relates to a multi-component cartridge.

Description

MULTI-COMPONENT CAR CHE

The invention relates to a cartridge with at least one in

Longitudinally extending receiving chamber for a medium to be discharged, as well as a multi-component cartridge according to the preamble of the respective independent claim.

In the industrial sector, in construction, for example, of buildings, and also in the dental field cartridges are often used to store liquid or flowable, often pasty or viscous to highly viscous substances and carry out as needed for the application. Examples of such substances are joint sealants, compounds for chemical dowels or chemical anchors, adhesives, pastes or molding compounds

Dentistry. Usually, these cartridges are made of plastic and are produced in an injection molding process.

A distinction is made between one-component system in which the material to be discharged consists of only one component, and two- or multi-component systems in which at least two different components are stored in separate chambers of the same cartridge or in separate cartridges, wherein the components in the

Discharging be intimately mixed by means of a dynamic or a static mixing device. Examples include two-component adhesive or chemical dowels, which only after mixing the two

Harden components. Especially in the industrial sector, two-component systems are also used for paints, which are often used for the production of functional protective coatings, eg for corrosion protection. It is often the case that the cartridges comprise one or more axially displaceable delivery pistons, by whose movement the material is discharged from the chamber or the chambers. It is understood that for this purpose the chambers must have sufficiently thick walls in order to withstand the pressure arising during discharge can. In addition, the cartridges must have sufficiently thick walls to be sufficiently diffusion-tight. This is particularly important in terms of storage, to diffuse in or out diffusing the

chemical substances and thus to prevent a degradation of the cartridge contents as effectively as possible. Since such plastic cartridges are usually designed for single use, resulting from both the volume and the mass of a significant amount of waste that must be disposed of, which is particularly disadvantageous from aspects of environmental protection. In addition to the aspect of environmental protection, the issue of sustainability is also becoming increasingly important. The use of renewable raw materials, the minimization of raw material and

Energy consumption and the largest possible reduction of waste or the least possible disposal of the waste both in terms of the cartridge itself and on the remaining in the cartridge volume of residual mass are gaining in importance.

It is therefore an object of the invention to propose a cartridge which is an improvement in terms of sustainability and environmental protection. In this case, a high reliability and good storage life of the cartridge should be ensured. Furthermore, to be made possible by the invention, a corresponding multi-component cartridge.

The object of the invention solving this object are characterized by the features of the independent claim of each category. According to the invention, therefore, a cartridge is proposed with at least one longitudinally extending receiving chamber for a medium to be discharged, with a head part and a cartridge wall, which limit the receiving channels, wherein a piston is provided which is insertable into the receiving chamber at the end facing away from the head part and sealingly displaceable along the cartridge wall in the longitudinal direction, and wherein the cartridge wall is made of a cardboard and is sealingly connected to the head part. The term paperboard also includes paperboard composites.

Surprisingly, it has been shown that even a cartridge whose cartridge wall is made of cardboard, in terms of shelf life, reliability and ease of use very well for the

Applications that are common today

Plastic cartridges are used. The use of cardboard is a great advantage, especially in terms of sustainability. The use of natural, regenerative raw materials such as cellulose fibers in the carton enables environmentally friendly use of resources and cost-effective, environmentally friendly disposal.

In addition, since cardboard can be made stable by its mechanical properties, the cartridge according to the invention offers the advantages of a conventional one in terms of its filling and its storability

Cartridge, so it does not have to be filled in elaborate filling devices as required for hoses in the rule and can be stored much easier, for example, standing.

The piston provided for discharging the medium from the receiving chamber has the advantage that, as a rule, smaller residual bulk volumes remain in the cartridge, as a result of which the amount of waste is reduced. Furthermore, in chemical media in the receiving chamber by the

Chemistry of individual, unreacted components minimized risks. The piston is preferably as a valve piston or

self-venting piston designed so that a simple venting during insertion of the piston is possible. In order to increase the proportion of natural raw materials even more, it is preferred if the head part is made of a cardboard. In particular with regard to the storability, it is preferred if the cartridge wall or the head part-in particular preferably both-comprise a foil which adjoins the receiving chamber

Surface of the cartridge wall or the head part is provided, and which is permanently connected to the cartridge wall or with the head part. The film provides a very efficient diffusion barrier, so that no concessions to the shelf life or the maximum storage time are necessary. Even with longer storage times, the cartridge contents are effectively protected against the outward or inward diffusion of substances or "outgassing." In addition, the cartridge wall or the head part is protected by the foil, for example if the carton material of the cartridge wall is sensitive to the medium in the receiving chamber Furthermore, the film offers a very high degree of flexibility with regard to the choice of material and can be adapted to the specific cartridge contents depending on the application Another advantage of the film is that, when the medium is being discharged, the friction between the cartridge wall and the cartridge is minimized Piston reduced.

In particular, in the embodiment with foil, it is possible to

Cartridge wall to reduce compared to conventional cartridges, because the wall thickness is no longer needed as a means to avoid or reduce diffusion-related degradation processes. There are preferred such embodiments in which the cartridge wall has a wall thickness of at most 1 .0 mm, preferably of about 0.5 mm. This small wall thickness means in comparison to conventional cartridges a very significant reduction of waste and a reduction of the for the

Production required raw materials. In order to be able to better withstand the mechanical stresses during dispensing despite the small wall thickness, the cartridge according to the invention is preferably inserted into a reusable support cartridge when discharging its contents, or a dispensing device is used in which the support function is directly integrated. Depending on the application, for example, for large-volume cartridges, even larger wall thicknesses can be realized selbstständständlich. The cartridge wall can also be designed so thick that no support cartridge or the like is necessary for the discharge. Depending on the application, it may be advantageous if the cartridge wall has a second film, which on the receiving chamber

remote, outer surface of the cartridge wall is provided. This second film can be used, for example, as protection against mechanical

Influences or be used for labeling, in particular to identify the cartridge contents.

An advantageous measure is that the film of the

Cartridge wall or headboard - preferably both - as

Multilayer system is designed. As a result, it is possible to optimally adapt the film to the particular application. The

Properties of the film serving as a barrier or diffusion barrier can be selectively adjusted in order to make it as efficient as possible with regard to the medium in the receiving chamber. Preferably, such a multilayer system is configured as a composite film. The multilayer system may also include metallic layers.

In a preferred embodiment, a dimensionally stable support ring

provided, which encloses the cartridge wall at the intended for receiving the piston end of the receiving chamber from the outside. This support ring is particularly advantageous in terms of storage, because it improves the seal between the cartridge wall and the piston. The support ring can be reusable.

It is advantageous if the support ring comprises an undercut, which supports the cartridge wall with respect to the longitudinal direction. After insertion of the piston in the receiving chamber of this is through the

Undercut secured.

In a preferred embodiment, the cartridge

Connection means provided by means of which the cartridge with a second cartridge is connectable. These connecting means can

be configured in particular as a latch or as a click or snap connection. The connecting means are preferably arranged so that the two cartridges are connected side by side connectable side by side, so that their longitudinal directions or longitudinal axes parallel to each other run. Also preferred are connecting means with which the

Cartridges are connected so that one cartridge is arranged in the other cartridge, preferably coaxially, so that the longitudinal axes of the two cartridges coincide. The possibility of connecting a plurality of cartridges via the connecting means significantly increases the flexibility with regard to the fields of application, in particular because the cartridges can be used very easily for multicomponent systems.

In particular, the support ring is suitable for connecting means there

provided. In a preferred embodiment, the head part comprises a

Adapter having an outlet for the medium. This adapter makes the cartridge particularly flexible in its applications because the adapter can be adapted to work with various accessories without the need for changes to other parts of the cartridge.

In this case, the adapter is preferably made of plastic - in particular injection-molded - and connected to the head part. This compound can be solvable or insoluble. Of course, the adapter and headboard may also be integral, for example produced in a single injection molding process. In the case of a separate adapter, the adapter can be glued, for example, after its production in an injection molding on the headboard or welded thereto or molded onto the head .. The adapter is then a separate component whose design and / or placement without changes to the Remainder of the cartridge is adaptable to the particular application. In particular, it is possible to manufacture the head part of the cartridge with the surface completely closed towards the outside-ie initially without an outlet for the medium-so that the medium in the receiving chamber can not escape to the outside and is protected during storage. The adapter, which includes the outlet, is placed on the header, with the outlet not yet having fluid communication with the receiving chamber. First for the

Application is then pierced through the outlet through the head of the cartridge, so that the medium can escape through the outlet.

Optionally, can also be dispensed with the piercing, z. B. then when the head part bursts by a sufficiently large internal pressure itself or by supporting a (cut) edge.

The invention further provides a multi-component cartridge

proposed with at least two cartridges, of which at least one cartridge is designed according to the invention, wherein the two cartridges are arranged side by side with respect to the longitudinal direction, or wherein the two cartridges are arranged inside each other, preferably coaxially with each other, so that the one cartridge encloses the other cartridge. The first variant involves so-called side-by-side cartridges in which the two receiving chambers are arranged side by side. In the second variant, the two cartridges are arranged inside each other, so that the cartridge wall of the outer cartridge completely surrounds the cartridge wall of the inner cartridge. Preferably, the inner cartridge is centered in the outer cartridge, so that their longitudinal axes A coincide. One then speaks of coaxial cartridges .. Through this multi-component cartridge, the field of application of

expand cartridge according to the invention on two- or multi-component systems.

Preferably, the two cartridges are firmly coupled to each other via the connecting means, so that the multi-component cartridge forms a bearing and dischargeable unit.

A particularly advantageous measure is when the adapter of the

Cartridges for cooperation with an accessory, in particular with a mixer, are arranged and configured. In this way it is possible, for example, known per se accessories in conjunction with the

Multi-component cartridge to use. This compatibility is advantageous for practical and economic reasons

According to a preferred embodiment, the

A multi-component cartridge comprises a mixer configured to cooperate with the adapters and having two piercing elements, each of which may engage an outlet to open a flow communication with the respective receiving chamber. By this measure leaves open the multi-component cartridge before use in a particularly simple manner.

To increase the flexibility of the multi-component cartridge with respect to

Application areas and applications can be increased

Accommodating chambers of the two cartridges different volumes

have, so in particular mixing ratios between the two media contained in the receiving chambers of the cartridges are feasible, which differ from the ratio 1: 1.

Further advantageous measures and embodiments of the invention will become apparent from the dependent claims.

In the following the invention will be explained in more detail by means of embodiments and with reference to the drawing. In the schematic drawing, partly in section: FIG. 1: an embodiment of a cartridge according to the invention in a longitudinal section with two detailed views

Fig. 2: schematic representation of a variant for the

Cartridge wall,

Fig. 3: schematic representation of another variant for the

Cartridge wall,

4 is an exploded perspective view of a first

Embodiment of an inventive

Multi-component cartridge,

5 shows a representation of the outlets of the embodiment

4,

6 shows an illustration of the outlets of the exemplary embodiment with an attached mixer (only partially shown), 7 shows a view of a second exemplary embodiment of a multi-component cartridge according to the invention

8 is a view of a third embodiment of a

According to the invention, a multicomponent cartridge, and FIGS. 9-10: representations of a discharge device, which are used for the

Cartridge according to the invention or the multicomponent cartridge according to the invention is suitable.

1 shows in a longitudinal section a first embodiment of a cartridge according to the invention, which is designated overall by the reference numeral 1. The cartridge 1 comprises a longitudinal direction

extending receiving chamber 2 for a medium to be discharged. The longitudinal direction is defined by the longitudinal axis A of the cartridge 1. The receiving chamber 2 is bounded by a cartridge wall 3 and a head part 4. Further, a piston 8 is provided, which at the end facing away from the head part 4 in the receiving chamber 2 is inserted and which is not yet inserted into the receiving chamber 2 in Fig. 1, but outside of this is shown. The piston 8 is preferably designed as a valve piston or self-venting piston. The piston 8 is designed and dimensioned such that it can be displaced sealingly in the longitudinal direction along the cartridge wall 3. For this purpose, the piston 8 may be configured in a manner known per se with sealing lips or sealing edges, not shown, which bear against the cartridge wall 3 when the piston 8 is inserted into the receiving chamber 2.

The piston 8 is produced separately from the cartridge 1, for example in an injection molding process and usually only after filling the

Recording chamber 2 used.

The receiving chamber 2 of the cartridge 1 is cylindrical, that is, the cartridge wall 3 is the lateral surface of a cylinder. The head part 4 of the cartridge 1 has an adapter 5 made of plastic,

For example, polyethylene (PE) (see also Fig. 4), which has an outlet

51 for the medium. The outlet 51 is here as a projecting tube the adapter 5 is provided. The adapter 5 is permanently connected to the head part 4, for example, welded or glued.

According to the invention, the cartridge wall 3 is made of a cardboard and sealingly connected to the head part 4. By the term paperboard is meant a material based on cellulose fibers or pulp or pulp or waste paper or combinations thereof, which usually, but not necessarily, comprises several layers of paper or paperboard

different thickness and / or different material. These layers are often pressed together without the use of adhesive. One or both sides of the box may or may be coated or painted. There are also cardboard materials known which consist of several bonded layers. The usual grammage of paperboard is between 150 and 600 g / m ² , but the invention is not limited to this

Weight range is limited. By using regenerative raw materials in the form of cardboard, the cartridge according to the invention particularly meets the requirements of environmental compatibility and sustainability.

Therefore, in a preferred embodiment, the head part 4 is also made of a cardboard. Fig. 1 shows in the upper detail view a way as the cardboard headboard 4 sealingly with the

Cartridge wall 3 can be connected. For this purpose, the head part 4 comprises a disc-shaped cover 43 which has at its radially outer end a rim 42 which extends in the longitudinal direction A as shown in the illustration above and which extends along the entire circumference of the lid 43. This edge 42 thus extends parallel to the cartridge wall 3 with respect to the longitudinal direction. The edge 42 and the cover 43 are in one piece, that is, the edge 42 is formed by folding or folding. The head part 4 is dimensioned so that the edge 42 rests fully on the cartridge wall 3. After the head part 4 is inserted inside in the circular opening formed by the cartridge wall 3, an upper portion 32 of the

Cartridge wall 3 as shown, down, so bent by about 180 °, or folded, so that the edge 42 of the head part 4 between the cartridge wall 3 and its upper portion 32 is trapped. Preferably In this case, the edge 42 is glued to the cartridge wall 3 or its upper region, welded or otherwise sealingly connected. Of course, other possibilities of connection between the head part 4 and the cartridge wall 3 are possible. For example, the head part 4 project beyond the cartridge wall 3. By folding the outer edge of the head part in the longitudinal direction, the head part can then be connected to the cartridge wall.

The cover 43 is designed as a disk and in particular has no opening through which the medium could pass from the receiving chamber 2 into the outlet 51. The outlet 51 has no

Flow connection with the receiving chamber 2. It is only immediately prior to the application that the lid 43 is opened through the outlet 51 by piercing the lid 43 with a sharp-edged or pointed object. Alternatively, a lid with a passage opening can be used, wherein the passage opening to the application

is closed, z. B. with a sealing plug.

The cartridge wall 3 and the head part 4 each comprise a film 31 or 41 which are respectively provided on the surface of the cartridge wall 3 and of the head part 4 delimiting the receiving chamber 2. The film 31 extends over the entire cartridge wall 3, including the upper region 32, ie in particular over the entire inside of the

Cylinder jacket, which limits the receiving chamber 2, and is permanently connected to the cartridge wall 3, preferably glued or

welded. The film 41 extends over the entire circular surface of the head part 4 including the edge 42 and is unsolvable with the

Head part 4 connected, preferably glued or welded. Optionally, in addition to the receiving chamber 2 facing away, outer

Surface of the cartridge wall 3, a further film 35 may be provided.

The films 31 and 41 serve as a barrier or as a diffusion barrier, which prevents the in-diffusion or the out-diffusion of substances. These substances may be, for example, chemical components of the medium contained in the receiving chamber 2 or

Humidity or oxygen. The films 31, 41 thus allow a particularly long storability of the filled with a medium cartridge 1. Due to the fact that the films 31, 41 act as barrier layer or diffusion barrier, it is possible, but not necessary, for example

Cartridge wall 3 with a thickness D to design, which is significantly lower than in known cartridges, because in the known from the prior art ago cartridges a greater wall thickness must be provided so that the cartridge is sufficiently diffusion-tight or is protected against outgassing. In particular, with the films 31, 41, it is possible to

Cartridge wall 3 with a thickness D of at most 1 .0 mm, preferably from about 0.5 mm to produce.

If one reduces the thickness D of the cartridge wall 3 or makes small, the beneficial effect that significantly less raw material for the

Preparation of the cartridge 1 is required and that the amount of waste usually designed for single use cartridge 1, both in terms of volume and on the weight significantly reduced.

The second advantageous effect of the film 31 is that it reduces the friction between the piston 8 and the cartridge wall 3. During use, for discharging the medium from the receiving chamber 2, the piston 8 is moved in the direction of the longitudinal axis A in order to convey the medium through the outlet 51. In this case, the film 31 enables a slight sliding of the piston 8 along the cartridge wall 3.

The two films 31, 41 can - but need not - be designed similar in terms of their thickness and composition.

Each of the films 31, 41 can be optimally adapted for the particular application. Depending on the composition and type of medium in the

Receiving chamber 2, the films 31, 41 are designed so that they have optimum shelf life and optimum protection of

Cartridge wall 3 and the headboard 4 ensure. Because of the films 31, 41 namely the medium in the receiving chamber 2 is not at all with the carton of the cartridge wall 3 and the head part 4 into contact.

This makes it possible for the production of the cartridge a particular inexpensive or a particularly environmentally friendly material

use.

A preferred measure is when the films 31, 41 each as

Multilayer system are configured, so for example, are formed of several superimposed films or layers. These

Different layers of the films 31, 41 can have different functions. On the receiving chamber 2 side facing

For example, it may be a protective layer consisting of a plastic which is insensitive to the medium to be discharged, for example polyamide (PA) or polybutylene terephthalate (PBT). This can optionally be followed by a barrier layer, the exit or entry of

Substances like water, oxygen or VOC (Volatile Organic

Compounds) prevented. Then, for example, follow a filling layer, the z. B. consists of recyclate. Also, layers of a polyolefin such as PE or PP may be provided or metallic layers.

In addition or as an alternative, it is also possible to provide foamed films as a layer.

At the end of the cartridge wall 3, on which the piston 8 is inserted, is also a dimensionally stable support ring 1 1, preferably made of plastic, is provided, which encloses the cartridge wall 3 from the outside in full circumference. By the term "dimensionally stable" it is meant that the support ring does not change its shape during normal use and is at most elastically deformable without considerable effort When the piston 8 is inserted into the receiving chamber 2, the supporting ring 11 supports the cartridge wall 3 in the area in which the piston 8 is located especially during storage of the filled cartridge 1 guaranteed.

The support ring 1 1 is sealingly and permanently connected to the cartridge wall 3. This can be done by gluing or welding the

Support ring 1 1 and the cartridge wall 3 done. Of course it is possible to detachably connect the support ring 1 1 with the cartridge wall, for example by attaching the support ring 1 first In particular, in such Ausgestzaltungen the support ring 1 1 is reusable.

It may be advantageous if the support ring 1 1 has an undercut 1 1 1, which can be seen in the lower detail view of FIG. The undercut is provided at the lower edge of the support ring according to the illustration and designed so that the cartridge wall 3 can be supported on the undercut 11 1 with its axial end with respect to the longitudinal direction. The undercut 1 1 1 projects with respect to the plane perpendicular to the longitudinal direction in the radial

Direction something about the cartridge wall 3 inside. Now, if the piston 8 is inserted so he snaps over the undercut 1 1 1 away and is then supported by this.

The cartridge 1 further comprises connecting means 10, by means of which the cartridge 1 with a second cartridge 1 is connectable. In the embodiment described here, the connecting means 10 are provided on the support ring 1 1 of the cartridge 1. The connecting means 10 are preferably designed in a manner known per se as a click or as a snap connection or as a latching connection and arranged so that two cartridges 1 are arranged side by side with parallel longitudinal axes A next to one another (see, for example, FIG. 4 ). Alternatively or additionally, of course, connecting means can also be arranged along the cartridge wall 3.

As already mentioned, the head part 4 is preferably made of cardboard, but may also consist of plastic. For the preparation of such a head part 4, the adapter 5, the piston 8 and the support ring 1 1 is a

Injection molding preferred. Suitable materials are all known per se, used for cartridges plastics such as polyamides (PA), polypropylene (PP), polyethylene (PE), polybutylene terephthalate (PBT), or polyolefins in general, optionally with fiber reinforcement. The carton wall 3 made of cardboard has the shape of a

cylindrical tube. To produce, for example, a rectangular piece of cardboard, optionally with the film 31 and / or the film 35 coated to a cylindrical tube to be bent and then to the light

glued or welded to overlapping ends. However, this can lead to problems with the tightness depending on the application, because this welding or adhesive seam or the overlap, where the two ends are glued or welded, forms a projection or an offset on the inner surface of the cartridge wall 3, which leads to unwanted leakage when sliding along the piston 8. Therefore, such are

Embodiments preferred in which the inner surface of the

Cartridge wall 3 is free of protrusions or beads. Such a variant for producing the cartridge wall 3 as a cylindrical tube is illustrated in FIG. The cartridge wall 3 comprises

at least two superimposed layers of cardboard, each consisting of at least one cardboard strip 33 and 34 (shown in broken lines). Each cardboard strip 33, 34 is each inclined to the longitudinal axis A wrapped around it, in such a way that the individual turns on each

Shock lie. There is no overlap between adjacent turns of the cardboard strip 33 and 34, respectively. The butt edges are designated 331 and 332 in FIG. The illustration according to the lower layer is formed by the cardboard strip 34 shown dashed lines with the butting edges 332, the upper position as shown by the cardboard strip 33 with the butting edges 331. In the variant shown in Fig. 2, the two layers are wound so that the lower layer is inclined inversely to the longitudinal axis A as the upper layer, that is, the individual webs of the

Cardboard strip 33 run as shown from top left to bottom right, while the webs of cardboard strip 34 from top right to bottom left run. The bump edges 331 of the upper layer form an acute angle a with the bump edges 332 of the lower layer.

In the layers that are not directly adjacent to the receiving chamber 2, so the outer layers, the adjacent turns of the

Cardboard strip 34 may also be arranged slightly overlapping to the

Improve tightness.

Another variant is shown in Fig. 3. The difference to the variant shown in Fig. 2 is that the two cardboard strips 33 and 34 are wound with the same inclination to the longitudinal axis A, but offset from each other. Again, the individual turns of the two strips of cardboard 33, 34 are each placed on each other butt. However, the upper edge bump edges 331 are parallel to the lower layer bump edges 332 here.

Both variants have the advantage that there is no overlap between adjacent webs because these are in shock. Due to the different inclination of the webs of the two layers (FIG. 2) or due to the offset between the webs of the two layers (FIG. 3), it is ensured that the butt edges 331 or 332 of one layer are covered by the respective other layer to effectively prevent leakage problems.

The cartridge 1 is first made without the piston 8 and the adapter 5 glued or attached. The receiving chamber 2 is closed by the lid 42 and the film 41 of the head part 4 with respect to the outlet 51. Of the still open darstellungsgemäss (Fig. 1) lower end of

Recording chamber 2, the medium is then filled into the receiving chamber 2. Subsequently, the piston 8 is inserted into the receiving chamber 2, and then forms the chamber bottom, which closes the receiving chamber 2 sealing. Frequently, the piston 8 is designed as a valve piston, so that when inserting the piston 8, the possibly present between the medium and the piston air is easily dissipated.

It is also possible to design the cartridge 1 so that it manages without adapter 5 or without the projecting tube which forms the outlet 51. Thus, for example, the head part 4 made of plastic or cardboard can be partially punched out, wherein the film 41 closes the receiving chamber 2 before use. For the application, a mixer is then inserted into this punch, whose inlet pierces the film 41.

Fig. 4 shows a perspective view of a first

Embodiment of an inventive

Multi-component cartridge, the entire by the reference numeral 100th is designated. The multi-component cartridge comprises at least two cartridges 1, each of which is designed according to the invention.

The first embodiment of the inventive

Multi-component cartridge 100 comprises two cartridges 1, each of which is designed as a cartridge 1 according to the invention.

In the following, by way of example, reference is made to the case, which is particularly important in practice, in that the

Multi-component cartridge 100 is a two-component cartridge comprising exactly two cartridges 1. It is understood, however, that the

Invention is not limited to such cases, but that the

Mehrkomponentnkartusche may also include three or more cartridges.

The two cartridges 1 of the multi-component cartridge 100 are arranged side by side next to each other so that their longitudinal axes A (see FIG. 1) are parallel to one another. The two cartridges 1 of the first exemplary embodiment (FIG. 4) are preferably firmly connected to one another via the connecting means 10. But it is also possible that the two support rings 1 1 of the cartridges 1 are made in a common injection molding process and then firmly connected to each other via non-destructive releasable elements, so that the two-component cartridge with respect to the support rings 1 1 is integral.

The same can also apply to the adapter or 5.

For each of the two cartridges 1, a piston 8 is provided in each case, which is introduced after filling the respective receiving chamber 2 in this. The two adapters 5 with the outlets 51 of the cartridges 1 are arranged and configured such that they are suitable for cooperation with an accessory.

Fig. 5 shows the end provided with the adapters 5 and the two outlets 51 of the multi-component cartridge 1 in a larger view.

In principle, it is not necessary to provide the two outlets 51 in the adapters 5 with a closure, because the respective medium in the Recording chambers 2 is protected by the films 41 and possibly the lid 42 of the head parts 4 against diffusion processes and leakage. However, it is understood that additional closure means may be provided. Fig. 6 shows the adapter 5 and the outlets 51 with an accessory, namely with a mixer 70. This is a static mixer 70 for mixing the two media, which are present in the respective receiving chambers 2 of the two cartridges 1. The static mixer 70 comprises, in a manner known per se, a mixer pipe 72, only indicated in FIG. 6, with mixing elements (not shown) arranged therein. The mixer 70 further comprises two inlets 71 and a coupling piece 73. When the mixer 70 is placed on the multi-component cartridge 100, each of the separate inlets 71 engages in or over one of the outlets 51, so that the inlets 71 each with one of the outlets 51 a

Form fluid connection and the respective medium from the respective receiving chamber 2 passes through the respective outlet 5 in the mixer 70. This is where the two media meet and become one

Passing through the mixer 70 intimately mixed.

It is understood that the inventive cartridge or the

inventive multi-component cartridge for others

Accessories may be configured, in particular other types of mixers, for example, those mixers that have no separate inlets for the media.

For the connection of the mixer 70 with the multi-component cartridge 100 via the coupling piece 73, all known per se of the

Connections, in particular screw, snap or bayonet connections.

To the lid 42 and optionally the film 41 of the head part 4 before the

Application to pierce or puncture, the mixer 70 at each of its inlets 71 each have a piercing element 74 which engages in one of the outlets 51 in order to open a Strömunngsverbindung with the respective receiving chamber 2. A variant for the realization of the piercing elements 74 is that the inlets 71 of the mixer - or corresponding parts of another accessory - are configured at their ends cooperating with the outlets 51, for example with a bevelled edge or a mandrel, that the inlets 71 when placing the mixer 70, the lid 42 and the film 41st

pierced or otherwise open.

Fig. 7 shows the view of a second embodiment of a

In the following, only the differences from the first embodiment will be discussed in more detail. The explanations that have been made with respect to the first embodiment, apply mutatis mutandis to the same for the second

Embodiment.

In the second embodiment, the multicomponent cartridge is designed for mass ratios deviating from 1: 1 and comprises two cartridges 1, wherein the receiving chambers 2 of the two cartridges 1 have different volumes. Such multicomponent cartridges 100 are intended for those two-component systems in which the two components have a volume ratio different from 1: 1

to be mixed with each other. In the illustrated in Fig. 7

Multi-component cartridge 100 has the illustration according to the left cartridge 1 ten times the volume as the representation according to the right cartridge. 1 Of course, other ratios are feasible, for example, 2: 1 or 4: 1.

Also in the multi-component cartridge 100 shown in Fig. 7, the connecting means 10 are provided between the two cartridges 1 between the two support rings 1 1.

Fig. 8 shows a perspective longitudinal sectional view of a third

Embodiment of an inventive multi-component cartridge 100. In the following, only the differences from the first or second embodiment will be discussed in more detail. The explanations that have been made with respect to the first and second embodiments apply mutatis mutandis to the same for the third embodiment. In the third embodiment, the two cartridges 1 are one inside the other arranged so that the cartridge wall 3 of Darstellungsgemäss outer cartridge 1, the cartridge wall 3 of the representation according to the inner

Cartridge 1 completely surrounds. Preferably, the inner cartridge is centered in the outer cartridge, so that their longitudinal axes A

coincide. In other words, in a section perpendicular to the common longitudinal axis A through the two receiving chambers 2, the two cartridge walls 3 of the inner and outer cartridges 1 form concentric circles about the longitudinal axis A. Such multicomponent cartridges 100 are usually referred to as coaxial cartridges and are sufficient for a person skilled in the art known so that they explain no closer meaning. According to the invention, each of the two cartridges 1, namely both the inner and the outer cartridge 1, each have one

Cartridge wall 3, which is made of a cardboard. The two pistons 8 are not shown in FIG. 7. The piston 8 belonging to the outer cartridge 1 according to the representation is configured as an annular piston in a manner known per se.

Alternatively, it is also possible to have an arrangement as in the third

Provide embodiment in which only one inventively designed cartridge 1 is provided and the second cartridge is made of plastic. For example, it is at a third

Embodiment analog arrangement possible to design the inner cartridge 1 as a plastic tube, so that only the outer cartridge has a cardboard wall made of cardboard. Of course, it is also possible to produce only the inner cartridge according to the invention with a cartridge wall made of cardboard and to manufacture the outer cartridge made of plastic.

Referring to Figs. 9 and 10, the use of the Zwezw. Multi-component cartridge 100 explained, the explanations in mutatis mutandis the same way applies to all embodiments. to

Use of the multi-component cartridge 100 is usually inserted into the holder of a dispensing device (dispenser) 200. Because the

Multi-component cartridge 100 with thin cartridge walls 3

is configured, the holder of the discharge device is preferably designed such that it additionally exerts a support function on the cartridge walls 3 in order to support them during the discharge of the medium, so that the Multi-component cartridge 100 of the mechanical stress during

Discharge can withstand better. Alternatively, a separate support cartridge can be used, which is designed for multiple use, so can be reused as often as possible

Multi-component cartridge 100 filled support cartridge is then inserted into the holder of the discharge device 200.

In the embodiment described here of the discharge device 200 with integrated support function (ie without separate support cartridge) is the

Multi-component cartridge 100 inserted into the holder of the discharge device 200, as indicated by the arrow without reference numerals in Fig. 9. The discharge device is closed, and a mixer 70 is attached by means of its coupling piece 73 to the discharge device 200 (FIG. 10), preferably with one with a screw, snap or

Bayonet connection. But it is also possible that the mixer 70 is not at the discharge device 200 but directly to the adapters 5 of

Multi-component cartridge is attached. If the mixer 70 is placed on the adapter 5, then the piercing elements 74 pierce the

Heads 4 so that the two media can pass through the outlets 51 in the mixer 70. Of course, it is also possible to pierce the head parts 4 before placing the mixer 70 with a separate tool and then to use a mixer without piercing elements. It is also possible, for example by applying pressure, to open the outlets by bursting open.

The discharge device 200 comprises a double plunger 210, which can be advanced by means of an activator 220. The double plunger 210 then exerts a force on the two pistons 8 in the receiving chambers 2, whereby they move along the longitudinal axes A of the cartridges 1 and promote the respective medium through the respective outlet 51 in the static mixer 70. Here, the two media (components) meet and are intimately mixed as they pass through the mixer.

Claims

claims

1 . Cartridge with at least one longitudinally extending receiving chamber (2) for a medium to be discharged, with a

Head part (4) and a cartridge wall (3), which the receiving chamber

(2) limit, wherein a piston (8) is provided, which at the end facing away from the head part (4) in the receiving chamber (2) is inserted and sealingly along the cartridge wall (3) in

Is longitudinally displaceable, characterized in that the cartridge wall (3) is made of a cardboard and sealingly connected to the head part (4).

2. A cartridge according to claim 1, wherein the head part (4) consists of a

Cardboard is made.

3. Cartridge according to one of the preceding claims, wherein the

Cartridge wall (3) or the head part (4) comprise a film (31, 41) which on the receiving chamber (2) delimiting surface of the cartridge wall (3) or the head part (4) is provided, and which is insoluble with the cartridge wall (3) or to the head part (4) is connected. 4. Cartridge according to one of the preceding claims, in which the cartridge wall (3) has a second film (32) which faces away from the receiving chamber (2), the outer surface of the

Cartridge wall (3) is provided.

5. Cartridge according to one of the preceding claims, wherein the film (31, 41) of the cartridge wall (3) or of the head part (4) as

Multilayer system is designed.

6. Cartridge according to one of the preceding claims, in which a dimensionally stable support ring (1 1) is provided, which the cartridge wall (3) at the end of the receiving chamber (2) intended for receiving the piston (8) from the outside.

A cartridge according to claim 6, wherein the support ring (1 1) has a

Undercut (1 1 1) which supports the cartridge wall (3) with respect to the longitudinal direction.

8. A cartridge according to any one of the preceding claims, wherein

Connecting means (10) are provided, by means of which the cartridge with a second cartridge is connectable.

A cartridge according to any one of the preceding claims, wherein the head part (4) comprises an adapter (5) having an outlet (51) for the medium.

A cartridge according to claim 8, wherein the adapter (5) is made of plastic and connected to the head part (4).

Multi-component cartridge with at least two cartridges, characterized in that at least one cartridge (1) according to any one of claims 1-9 is configured, wherein the two cartridges (1) are arranged side by side with respect to the longitudinal direction, or wherein the two cartridges (1) into each other, Preferably coaxially with each other are arranged so that the one cartridge encloses the other cartridge.

Multi-component cartridge according to Claim 10, in which the two cartridges (1) are firmly coupled to one another via the connecting means (10).

Multi-component cartridge according to one of claims 10 or 11, in which the adapters (5) of the cartridges (1) are arranged and designed to cooperate with an accessory, in particular with a mixer (70).

14. A multi-component cartridge according to claim 12 comprising a mixer (70) adapted to cooperate with the adapters (5) and having two piercing elements (74), each of which can engage in an outlet for fluid communication with the respective receiving chamber (70). 2) to open.

15. Multi-component cartridge according to one of claims 1 1 -14, wherein the receiving chambers (2) of the two cartridges (1) have different volumes.