Cartridge for receiving and processing building materials

Abstract

The invention relates to a cartridge for receiving and processing building materials, comprising a cartridge cylinder, a cartridge head which can be releasably placed on the end face of the cartridge cylinder, a tubular bag with building material contained therein, and a displaceable plunger-like cartridge base, wherein the cartridge cylinder is formed as a cardboard sleeve (1) and the cartridge base is formed as a cardboard plunger (2), wherein the cardboard plunger (2) forming the cartridge base is formed annularly, consisting of a cardboard plunger sleeve (7), which can be displaced resting circumferentially tight against the inner wall of the cardboard sleeve (1) forming the cartridge cylinder, and an underside beading (6) which is formed integrally from the cardboard plunger sleeve (7) itself by way of beading. 

Description

Cartridge for receiving and processing building materials The invention relates to a cartridge for receiving and processing building materials such as sealants, silicones or adhesive compounds. It is known practice in the prior art for such building materials to be received in cylindrical cartridges in order for them to be extractable via a corresponding outlet in the form of a spout placed on the cartridge head. For this purpose, this cartridge is conventionally manufactured as a disposable product consisting of a plastics tube that has an integral, closed cartridge head and is filled with the compound to be processed, and then the end of this cartridge is tightly closed by means of a cartridge base. In order to then remove the building-material compound from the cartridge, the cartridge is inserted into an extrusion tool in the form of a cartridge gun or the like and is acted upon by a pressure plate, which is for example manually mechanically operated and bears against the displaceable cartridge base within the cartridge and presses the viscous mass of the building material out of the cartridge for processing. This solution also has the advantage of ease of handling, since the cartridge can be easily inserted laterally into the cartridge gun and is also released again from the interior of the cartridge by retracting the pressure plate, which is generally arranged on a toothed rack.Manually operated half-barrel pressing tools are known and widely used here, which have a toothed rack for moving the pressure plate and a half-barrel for receiving the cartridges and in which the cartridge is fixedly clamped. In the case of more complex and more professional designs, pressing out no longer takes place manually, but instead typically involves fully mechanized devices that move the pressure plate, for example by means of compressed air or with the aid of an electric motor.In this case, the tightness with regard to storage capability is important for the function of such a cartridge, since the building material will generally react with ambient air, resulting in curing of the building-material product located in the cartridge. Advantages of this form of the disposable product cartridges widely used on the market can be seen in the good storage capability, product presentation and ease of processibility, even for non-professionals, by way of the spout placed on the cartridge, wherein the forward movement of the pressure plate into the cartridge can be readily metered. The mechanical manual movement is conventional in this case, in particular in non-professional use, wherein electrical and pneumatic drives are widely used as an alternative in the professional technical sector.However, this practice has the rather obvious disadvantage that the disposable cartridges are cylindrical plastics bodies and thus are problematic both to produce and to dispose of. Especially in light of fundamentally increased efforts to reduce plastics products both to conserve resources during production of the plastic and to avoid residual waste, alternatives are urgently required here. This issue of disposal is aggravated by the fact that building-material residues, which often harden in the cartridge head of these disposable cartridges and thus remain in these cartridges, prevent a meaningful separation of waste and thus only disposal as residual or special waste is possible. This results in particular from the fact that the cartridge head, on which the nozzle-like spout for discharging the material pressed out of the cartridge is placed, is filled with cured building-material compound as it is used, as a result of which recycling and in particular separate disposal of the cartridge is not possible. Since, in the case of disposable cartridges, the cartridge head of the cartridge is fixedly connected to the further cartridge body as an integral constituent part; these components may be separated from one another only by cutting open and thus destroying the cartridge. This rules out reuse as a starting material or as raw material for new plastics products. The prior art of publication DE 41 39 744 A1 already discloses a cartridge for receiving, for example, sealing compounds or adhesives, the aim being for said cartridge to be reusable. For this purpose, provision is made for the front outlet connection piece of this construction to be inserted into the cartridge cylinder as a separate component and to be supported on the inside of the open end wall of the cartridge body, but therefore not integrally formed therewith, for example as a plastics component. According to this invention, after the building material contained in the cartridge has been pressed out, the remainder of the compound that is still in the cartridge can be pushed back to the rear end of the cartridge using the outlet connection piece and removed from the cartridge at the rear. The outlet connection piece inserted into the cartridge cylinder as an insert part and also the plunger for pressing the building material out of the cartridge can thus be detached from the cartridge cylinder, which can then be reused. It is only the outlet connection piece and the plunger that cannot be reused, since they are contaminated with the pressed-out building-material compound. This is a theoretical improvement over disposable cartridges, since this makes it possible to at least separate the plastics cylinder of the cartridge from the building-material compound contained therein. However, it is difficult in practice to actually press the outlet connection piece back through the elongate plastics cylinder to the open end of the cartridge, depending on which cured substances are contained and in what residual amount. For example, in the case of adhesive compounds or silicones, it is difficult to return the outlet connection piece bearing against the end wall of the plastics cylinder, since the remaining building-material compound and the cartridge base inserted as a plunger also have to be pushed out therewith. Moreover, it is also disadvantageous that it can be assumed that it should not be possible to reuse the plastics cylinder without outlay in terms of reprocessing and cleaning, since the cylinder comes into direct contact with the building material. Finally, it is disadvantageous that in this form of cartridge, analogously to disposable cartridges, there is often a considerable amount of cured residual compound that can no longer be processed, and therefore the contents of the cartridge may only be partially removed, since any residual building material that may still be processable can no longer be made accessible.Another alternative to the described cartridges in the form of disposable products is tube-like containers, which are widely used, in particular in professional applications, in tubular-bag guns, which have a more complicated design. For this purpose, tubular-bag pistols have been created as special receiving and discharging devices that make it possible to remove the compound from these transport tubes. This represents an improvement over disposable cartridges in that the volume of waste remaining in the tubes after the contained building-material compound has been pressed out is significantly lower than is the case for disposable cartridges. However, it is disadvantageous that special tubular-bag pistols as receiving and discharging devices are complicated and cost-intensive to produce, which is why they are primarily used in the professional sector. A further problem lies in the transport and storage of these building-material tubes, since they, for example, cannot be stored upright and the tubes themselves do not have the robustness of a plastics cartridge either. This is particularly problematic since, in the event of an individual tube being destroyed, for example during transport, a multiplicity of further building-material tubes may be adversely affected through contamination. It must therefore be taken into account that the transport and removal tubes used must not be designed to be too thin-walled in order to rule out damage during storage and transport. This in turn increases the requirements on the device for receiving and discharging the contained compound and on the amount of plastic used in the production of the tube.Publication EP 23166808.8 describes a cartridge for receiving and processing building materials, in which the cartridge body and the cartridge base can already consist of cardboard, wherein a cup shell, which bears closely against the inner wall of the cartridge cylinder and is open on the front side, is placed on the cartridge base, or the cartridge base integrally comprises such a cup shell, or a cup insert is placed on the cartridge base so as to be displaceable therewith. The aim is thus for the emptied tubular film to be received in this cup shell, so that the tubular film cannot end up between the cartridge base in the form of a displaceable plunger and the inner wall of the cartridge body. In practice, it has been found to be disadvantageous here that this requires a cup shell with a height that not only negatively reduces the pressure on the inner wall of the cartridge body but also entails a loss in terms of the material that can be pressed out, since the height of the cup shell determines the distance from the cartridge head to the cartridge-emptying end. The invention disclosed in EP 3 936 454 A1 relates to a cartridge cap that can be mounted on a distal end of a cartridge body for use with an extrusion gun. In addition, a plurality of rods extend in the longitudinal direction from an inner surface of the cap body, at least one rod of which is suitable for piercing a flexible bag. Moreover, a paper-based cartridge cylinder is disclosed. However, two aspects are disadvantageous here, firstly the cartridge cap, which is inserted into the cartridge and offers no space for the compressed tubular bag, and secondly the cartridge base, which, precisely because of its rounded transition region to the inner wall of the cartridge body, cannot reliably ensure that the tubular bag to be compressed is reliably guided. The same applies to the disclosure of DE 9 116 065 U1, which likewise discloses a tubular-bag solution, with the inventive concept here residing in the sealingly inserted cartridge head, with a paper-based cartridge cylinder likewise being shown. However, it is also disadvantageous here that, firstly, the cartridge head, after emptying, is fixedly seated in the cartridge cylinder and prevents separation and, secondly, the cartridge base leads to problems during controlled emptying of the tubular bag, since the emptied tubular bag can become jammed in the transition between the cartridge cylinder and the cartridge base and block the latter.Against this background, the object of the cartridge according to the invention is firstly to provide a cartridge for building-material compounds that is suitable for both professional and non-professional use and that advantageously combines the advantages of disposable cartridges with the advantages of tube storage of the building-material compounds to be processed. The aim is therefore to be able to also use a cardboard plunger that reliably prevents the tubular film from penetrating between the cardboard tube of the cartridge and the displaceable cardboard plunger as the cartridge base. For this purpose, the cardboard plunger should have a high inherent stability and at the same time only a low height of a cup-like cardboard plunger tube in order to be able to press out the material located in the film tube as completely as possible.In particular, the intention is to significantly improve the environmental friendliness of these products firstly by virtue of increasing the proportion of building-material compound that can be used and processed, and secondly by producing less waste when using the present cartridge, at least as a result of improved separation of the structural constituent parts of the cartridge. On the other hand, however, this should also be achieved while fully maintaining the functionality and clean emptying of the tubular bag.According to the invention, this is achieved by a cartridge having the characterizing features of claim 1.The further claims relate to advantageous embodiments of this invention. The technical realization of the desired system from a cardboard tube forming the cartridge with a plunger guided displaceably in this cardboard tube, said plunger likewise being intended to consist completely and exclusively of cardboard for reasons of improved environmental protection, necessitated further developments until a cartridge body that is actually also usable in regular operation could be found.The central problems here are in particular the film guidance of the film tube within the cartridge body during the process of pressing the film bag, since the compression of this film bag is problematic in that the film can slide into the intermediate space between the cartridge inner wall and the displaceable plunger and thus entirely blocks the cartridge from being used. This leads to loss of material and to incomplete removal of the material from the tubular bag, this running counter to the concept of environmental protection. Therefore, the object of the present further development of the product was, in particular, to achieve a clear improvement with respect to the guidance of the tubular bag within the cartridge and, at the same time, to realize good waste separation in the case of a design having a cardboard tube and a cardboard plunger.In this case, it is particularly advantageous that, according to the invention, only 2 residual products remain after use, namely the cardboard tube with the cardboard plunger pushed forward in the cardboard tube on the one hand, which can accordingly be completely disposed of as waste paper on account of likewise being labeled with a paper label. The second components are residual waste in the form of the plastics nozzle head, which is placed on the cardboard tube or inserted into the cardboard tube and through which the product is pressed out. The compressed film tube with a minimal amount of residual material is also pressed into this plastics nozzle head, it being possible for this combination of plastics nozzle head with tubular bag and residual contents to be disposed of together as residual waste. This achieves a completely problem-free solution that can also be safely used in practice and advantageously also converts the environmental protection concept into practical work and does not involve excessive outlay for separation, which would otherwise result in separation of the constituent parts of the waste being dispensed with in practice.The advantages of the novel development will thus be mentioned below in the form a cardboard plunger, which is guided such that it can be displaced firmly and closely on the cartridge inner wall by way of a tube-like outer edge that is guided closely and tightly in the cardboard tube and thus prevents, on the one hand, a tubular bag or the emptied film portion, from which the product has already been removed, from being able to slide past. In this case, as already mentioned in the prior art, a cup-like shape of the outer edge of this plunger is provided in order to be able to guide the tubular bag and, at the same time, however, the height of this tube is intended to be selected such that it does not take up too much space during the emptying of the tubular bag, since it forms a spacer body with respect to the head of the cartridge. This height must therefore be configured to be as small as possible in order to simultaneously achieve good guidance of the tubular bag and of the emptied film, but at the same time also to be able to press out the contents of the tubular bag as completely as possible. The central feature according to the invention, which has led to a design of this cardboard plunger that is actually stable and adequately loadable in terms of force, is solid plunger flanging, which leads to the inherent stiffness of the plunger, at the same time as a low plunger tube height, as explained above, being sufficient to be able to apply the required pressure force to the tubular bag when it is used in a cartridge gun. It is essential in this case that the stiffening that can be achieved by means of this flanging enables the contact pressure of the tube-like or cup-like plunger tube, which is aligned with the head of the cartridge, against the inner wall of the cardboard tube forming the cartridge. In addition, the integral design of the flanged cardboard plunger achieves a high degree of stability here, wherein the cup-like plunger tube protrudes directly from the flanging or the flanging is produced directly from the overall tube forming the cardboard plunger. This likewise increases the pressure of the plunger tube portion above the flanging against the inner wall of the cardboard cartridge, since the flanging results in a slight widening toward the upper end of the plunger tube portion, where the close bearing for guiding the tubular bag film in the transition to the displacement region against the inner wall of the cardboard cartridge takes place.Provision is made here, on the one hand, for this cardboard plunger to have an annular design, wherein the plunger flanging already bears as a support ring against the plunger plate of a cartridge gun and the film tube is guided here.A further improvement can be achieved by virtue of a stiff cardboard-plunger base plate coming to rest against the plunger below the latter and this likewise stable cardboard disk in turn acts as a pressure plate on the cardboard plunger and thus serves as a support for the plunger plate of a cartridge gun. This additionally improves the stable guidance of the cardboard tube of the cardboard plunger in the cardboard tube and the underside of the cartridge is also closed, this being advantageous in particular also during the storage and transport of the cartridge according to the invention. In this case, this cardboard disk can bear as a releasable body against the underside of the cardboard plunger or can also be fixedly connected, for example adhesively bonded, to this cardboard plunger.It has also proven advantageous for a securing ring, for example in the form of a glue ring, to be arranged on the lower inner wall of the cardboard tube, said securing ring securing the cardboard plunger or the cardboard plunger with the cardboard disk bearing against it. This is also particularly relevant for storage and transport of the pre-prepared cardboard cartridge. As a result of the glue ring, the cardboard disk and / or the cardboard plunger cannot be pressed out as a result of the intrinsic weight of the tubular bag in the cardboard cartridge. Thus, only a movement into the cardboard tube is possible as a result of corresponding pressure on the plunger in order to displace it out of the cartridge in the direction of the outlet opening.This also has advantages in terms of the manufacturing of the cartridge, since, after the securing ring has been arranged on the inner wall at one of the openings of the cardboard tube, the cardboard plunger is prevented from escaping, if appropriate with the cardboard disk bearing against it. It is therefore possible to introduce the cardboard plunger, if appropriate with the cardboard disk bearing against it, from the second opening of the cardboard tube into the latter as far as a lower stop point, which is determined by the safety ring. This makes it possible to automate this manufacturing step.The invention will be explained in more detail below with reference to drawings, in whichfigure 1 shows the cardboard tube with cardboard plunger inserted;figure 2 shows a section through figure 1;figure 3 shows an exploded illustration of the cardboard cartridge in a perspective view; figure 4 shows an exploded illustration of the cardboard cartridge in a side view, and figure 5 shows a section through figure 4. Figures 1 and 2 show the cardboard tube 1 forming the cardboard cartridge with the cardboard plunger 2 guided therein and the cardboard disk 3 bearing against the cardboard plunger 2 below the latter. It can be seen that this combination of cardboard plunger 2 and cardboard disk 4 is arranged at the lower end (on the left-hand side in the illustration) of the outlet opening of the cardboard tube 1, wherein an embodiment is illustrated here in which a securing ring 4 is additionally provided, for example in the form of a glue ring, below the cardboard disk 3, said securing ring serving to secure the cardboard disk 3 and the cardboard plunger 2 in this region.It is also clear here that the cardboard plunger 2 has solid flanging oriented toward the cardboard disk, as a result of which the cardboard plunger is composed of this annular flanging 6, which comprises a central free space for the cardboard disk and the cup-like cardboard plunger tube 7 as a continuation of the flanging, oriented toward the open outlet side of the cardboard tube 1 forming the cartridge, which serves to guide a tubular bag, which is not shown in more detail in this figure. It is thus clear that the cup-like tube 7 of the cardboard plunger oriented toward the head of the cartridge serves to guide a film tube in the cartridge arrangement, the underside being closed off by the cardboard disk, which therefore serves as a bearing surface against which the plunger plate of a cartridge gun presses.Also illustrated here is the winding gap 5 for producing the cardboard tube 1, which has a particularly thin form in this embodiment of the cardboard tube 1 according to the invention. The inner layer of the cardboard winding of this cardboard tube 1 has the sharp cut edge oriented inwardly, wherein the winding gap 5 of this cardboard winding is smaller than 0.3 mm, i.e. is designed to be as small as possible. This is intended to prevent an intermediate space between the outer edge of the cardboard plunger and the inner surface of the cardboard tube 1 from being able to result in the tubular bag film being able to be inserted into this winding gap 5 of the cardboard winding and thus slide into the plunger intermediate space. This means that the narrowest possible design according to the invention of the winding gap 5 of the cardboard winding is likewise relevant to the invention in order to be able to reliably rule out the desired avoidance of the film penetrating between the cardboard plunger 2 and the cardboard tube 1.The further figures 3 to 5 show the interaction of the structural elements of the cardboard tube 1, the cardboard plunger 2, the cardboard disk 3 and the securing ring 4 in exploded illustrations. In this case, figure 3 shows a perspective view, figure 4 shows a side view and figure 5 shows a section through figure 4.It can be seen here how these structural components interact in a certain sequence. It can be seen here that the securing ring 4 is arranged below the cardboard disk 3 and the cardboard plunger 2, since the securing ring 4 has the function of preventing these structural elements of the cardboard plunger 2 and the cardboard disk 3 from unintentionally falling out of the cardboard tube 1.Moreover, as in figures 2 and 3, figure 5 also shows the flanging 6 in the cardboard plunger 2, it being clear that this flanging 6 of the cardboard plunger 2 provides very stable and load-bearing stiffening. In the case of a radius of the cardboard plunger 2 of approximately 2.2 cm, a diameter of the flanging of approximately 3 to 5 mm is provided, as a result of which the flanging has approximately 3 to 5 times the thickness of the actual cardboard plunger tube 7 of the cardboard plunger 2. When viewed as a whole on the surface of the cardboard plunger 2, the diameter of the flanging 6 approximately has a value of approximately 15% to 30% relative to the radius of the cardboard plunger 2. This makes it possible to achieve the desired structural integrity of the cardboard plunger 2 and the contact pressure against the inner wall of the cardboard tube 1.Figure 5 also shows the circumferential winding gap 5, which is arranged continuously in the inner wall of the cardboard tube 1. It is relevant here that this winding gap 5 has a maximum thickness of 0.3 mm in order to prevent the tubular film from being pressed into this depression. It is also clear from figure 5 that, as a result of the flanging 6 in the inner circumference of the cardboard plunger 2, the interior space of the cardboard plunger 2 is reduced or narrowed, which also means that additional material mass can moreover be pressed out of this narrowed space. This further increases the compression of the tubular bag. As a result, the entire compression process of the tubular bag takes place more uniformly within the cartridge cylinder and the emptied tubular bag is prevented from entering the previously described annular gap space between the cartridge cylinder and cartridge base. According to the invention, provision is made here for the building-material compound to be arranged in a displaceable tubular bag in the cartridge. This results in four basic constituents of the cartridge according to the invention, namely the tubular bag in which the building-material compound to be processed, for example a silicone compound or sealing compound, is contained, a cartridge cylinder, which encloses this tubular bag as closely as possible, the cartridge base, which is displaceable in the cartridge cylinder as a sealing, displaceable plunger element, and the cartridge head, which is placed on the end side and has an outlet connection piece and outlet opening, which generally has an attached thread for mounting a spout. These four elements are designed to be separable from one another, since the tubular bag is inserted releasably into the cartridge cylinder in order then to close the front and rear sides of this cartridge cylinder by means of the cartridge base on the one hand and the cartridge head on the other hand.This forms a cartridge that is externally similar to customary disposable cartridges, since it has a closed, stable basic body of cylindrical design, which makes it possible for this cartridge to be inserted, for example, into a conventional cartridge gun.An essential aspect of the present invention is that, on the one hand, an environmentally friendly product is provided, since it can be supplied separately for reuse, but at the same time, the advantageous aspects of the currently used disposable cartridges with respect to trade and handling are retained. Accordingly, it is a product that can be stored, transported and used like a disposable cartridge; the presentation at the point of sale, for example a hardware store, as well as product design, the application of the product information and advertising on the packaging, are readily possible as in the case of a disposable cartridge. Nevertheless, the present modular design of the product makes it possible to separate these individual modules and thus also to achieve substantial advantages over the known disposable cartridges but also over the use of material tubes in correspondingly complex-to-produce application guns.The use of the cartridge according to the invention will be explained in this respect by way of example. The cartridge according to the invention can be purchased in a conventional manner, for example at a hardware store. In this case, the tubular bag containing a building-material compound, for example a sealing compound, is located in the cartridge cylinder. In this case, the container is closed by the cartridge base inserted at the end and the cartridge head placed on the front side. However, it is essential here that these elements are not fixedly connected to the cartridge cylinder as the main body or, in the case of the cartridge head, are an integral constituent part. This naturally results for the cartridge base in its function as a pressure plunger, since the latter has to be displaced into the cartridge in the longitudinal axis in order to press the compound out of the tubular bag. However, the cartridge head is likewise only releasably attached and can be removed again at any time from the cartridge cylinder as the main body of the cartridge, with the result that access to the tubular bag is retained here as an essential feature of the invention. When the cartridge according to the invention is inserted into a cartridge press or cartridge gun, a feed rod with a pressure plunger is pressed against the cartridge base serving as a plunger, and the plunger-like cartridge base is thus displaced into the interior of the cartridge and, in the case according to the invention, pressed onto the tubular bag. The latter is thus pushed against the cartridge head and pressed against it, wherein the cartridge head is supported by a receptacle that is an integral constituent part of the cartridge gun. Thus, the cartridge according to the invention is clamped between this receptacle for the head of the cartridge and the pressure plate for engagement into the interior of the cartridge cylinder. In this way, the tubular bag is pressed into the cartridge head and, at the same time, the removable cartridge head is pressed against the cartridge cylinder when the building-material compound is pressed out of an outlet opening in the cartridge head. Advantageously, as a result, with full functionality, the cartridge head as a detachable component is not fixedly connected to the cartridge cylinder and can be removed from the cartridge cylinder.This eliminates the problem of having to dispose of half-emptied disposable cartridges, together with the building-material compound still contained therein. The present cartridge therefore makes it possible in an inventive manner for the material in the tubular bag, for example a sealing silicone, to also actually be completely used up and for cured building-material compound to be able to be disposed of separately.Once the building-material compound has been used up and the pressure-plate rod has been pushed completely into the cartridge cylinder, this pressure plate is retracted and the emptied cartridge can be removed from the cartridge gun and broken up into individual modules. Thus, the cartridge head is removed and, if necessary, the cured remaining building-material compound is removed from this cartridge head with the compressed tubular bag adhering thereto. This tubular bag with the residue of the cured building-material compound still remaining in the cartridge head can thus be disposed of separately or with the cartridge head.  

Claims

1. A cartridge for receiving and processing building materials, comprising a cartridge cylinder, a cartridge head, which is detachably mounted on the end face of the cartridge cylinder, a tubular bag with building material contained therein and a displaceable plunger-like cartridge base, wherein the cartridge cylinder is in the form of a cardboard tube (1) and the cartridge base is in the form of a cardboard plunger (2),characterized in that- the cardboard plunger (2) forming the cartridge base has an annular design and consists of a cardboard plunger tube (7), which is designed to be displaceable such that it circumferentially bears closely against the inner wall of the cardboard tube (1) forming the cartridge cylinder, and - underside flanging (6), which is integrally formed from the cardboard plunger tube (7) itself by flanging the latter.

2. The cartridge for receiving and processing building materials as claimed in claim 1,characterized in thatin relation to the radius of the cardboard plunger (2), the diameter of the flanging (6) approximately has a value of approximately 15% to 30% of the radius of the cardboard plunger (2). 3. The cartridge for receiving and processing building materials as claimed in claim 1 or 2,characterized in that- a cardboard disk (3), which bears against the flanging (6) on the annular body of the cardboard plunger (2), is arranged on the cardboard plunger (2) and - forms a supporting disk between the cardboard plunger (2) and the plunger plate of a cartridge gun, and - forms, with the cardboard plunger tube (7) and the flanging (6) a common closed space for the plunger plate of a cartridge gun for guiding the tubular film bag. 4. The cartridge for receiving and processing building materials as claimed in any of claims 1 to 3,characterized in that a securing ring (4) is arranged on the inner wall of the cardboard tube (1) forming the cartridge cylinder at one of the open cardboard-tube openings in such a manner that the cardboard plunger (2) or the cardboard disk (3) resting against said cardboard tube are secured against falling out of the cardboard tube (1). 5. The cartridge for receiving and processing building materials as claimed in any of claims 1 to 4,characterized in thatthe cardboard tube (1) forming the cartridge cylinder has a winding gap of less than 0.3 mm. 6. The cartridge for receiving and processing building materials as claimed in any of claims 3 to 5,characterized in that the cardboard plunger (2) and the cardboard disk (3) merely bear against one another or are fixedly connected to one another. 7. The cartridge (1) as claimed in any of the preceding claims,characterized in that- the tubular bag has an upper tubular-bag end and a lower tubular-bag end, - wherein the cardboard plunger (2) forming the cartridge base bears against the lower tubular-bag end so as to displace the tubular bag toward the cartridge head in the longitudinal axis direction of the cardboard tube (1) forming the cartridge cylinder, - and the upper tubular-bag end engages in the cartridge head. 8. The cartridge (1) as claimed in any of the preceding claims,characterized in thatthe cardboard tube (1) forming the cartridge cylinder, the cartridge head, the displaceable cardboard plunger (2) as the cartridge base and the tubular bag are releasably connected to one another and are designed to be separable. 

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