WO2007039239A1 - Multi-component cartridge - Google Patents

Abstract

The invention relates to a multi-component cartridge (1) for the separate storage and joint pressing out of at least two components of a flowable mass. The invention proposes that the multi-component cartridge (1) have an axially compressible (flattenable) inner chamber (3) in an outer chamber (2) and that the components be pressed out using the same plunger (11), which is impinged upon with compressed gas, said plunger flattening the inner chamber (3) when the components are pressed out.

Description

 description

Multicomponent cartridge

The invention relates to a multi-component cartridge for the separate storage and for the common pressing of at least two components of a flowable mass, with a head piece with outlet opening and with a

Expressing piston, according to the features of the preamble of claim 1. Sub

"Flowable mass" should be understood in particular a mass of pasty components, such as multi-component adhesives, multi-component resins or multi-component mortar, which have a high viscosity.

It is known to apply bicomponent masses of bicomponent cartridges in which the components are stored in separate chambers. By means of one or two extrusion pistons, the components located in the chambers can be passed through in a predetermined mixing ratio

Squeeze the outlet openings of the chambers and then mix. There are both cartridges that are tubular and have a sliding extrusion piston as the bottom, as well as cartridges in which the components are housed in a bag and which are provided for insertion into a cartridge press with a cylindrical receiving space with sliding extrusion piston. Such cartridges are usually used as disposable items and disposed of after the components have been squeezed out.

In order to mix the components of the two-component mass well, it is customary to squeeze the flowable mass through a mounted on the outlet openings static mixer. Especially with highly viscous masses, this is very difficult. When

Tools for pressing such cartridges cartridge presses are known because the user pressing a hand without tools can not be expected.

To extrude the components from the multi-component cartridge, the cartridge is inserted into the cartridge press, for example, in such a, in which the

Pressure for squeezing the components is generated by hand, and moving the extrusion piston via a mechanically actuated push rod or the like. A uniform dosage of the flowable mass is possible only to a limited extent with such cartridge presses; In addition, squeezing tires the user in the long run. Also known are pneumatic cartridge presses which are connected to a stationary compressed air source via a compressed air hose.

Such cartridge presses are expensive, which represents a major barrier to purchase for a user who only occasionally wants to process a cartridge. In addition, compressed air is not always present at the place of processing of the cartridge.

The invention has for its object to propose a multi-component cartridge that allows application of the components of the flowable mass without great effort at a uniform dosage and requires no additional equipment for their use.

The multi-component cartridge according to the invention serves for storage and for

Squeezing a flowable mass, which consists of at least two components, which are stored in a cartridge housing of the multi-component cartridge in separate chambers and pressed together. For this purpose, the cartridge housing has an ejection piston which can be moved to an outlet opening of a head piece of the cartridge housing and a device for building up an extruding pressure for extruding the components of the flowable mass which is arranged on a side of the ejection piston facing away from the headpiece. The device is connected to the extrusion piston of the multicomponent piston. Cartridge in operative connection and allows the structure of the extrusion pressure with little effort for the user, whereby the multi-component invention

Cartridge is particularly user-friendly.

The build-up by means of the device extrusion pressure is variable and can be adapted to the viscosity of the flowable mass, whereby the expressed by the outlet opening per unit time amount of mass adjustable and to the

Working habits of the user and to the purpose of use is customizable. The auspressende flowable mass is metered with the device as needed.

Advantageously, the device for building the discharge pressure on a pressure chamber for receiving a compressed medium, which in

Cartridge housing the multi-component cartridge on a head piece facing end face of the extrusion piston of the multi-component cartridge is completed. The compressed medium in the pressure chamber of the multi-component cartridge has a pressure which acts directly on the extrusion piston and allows movement of the extrusion piston for squeezing the components of the flowable mass to the outlet opening of the head of the cartridge housing.

The pressure chamber is in particular integrated in the cartridge housing, wherein the chamber is delimited by an outer wall and a bottom of the cartridge housing and by the extrusion piston of the multi-component cartridge. The bottom of the

Multi-component cartridge is sealed to the cartridge housing and the squeeze piston is sealed to the pressure chamber and to the chambers containing the components of the flowable mass. For filling the pressure chamber with the compressed medium, an inlet opening with a valve is provided at the bottom of the multi-component cartridge. However, it is also possible that

Pressure chamber adaptable to the cartridge housing of the multi-component cartridge. For this purpose, for example, a separate, cup-shaped bottom piece, which has the inlet opening for the medium, be sealingly attached to the side facing away from the head piece of the multi-component cartridge on the outer wall of the cartridge housing releasably secured. This has the advantage that the pressure chamber can be used multiple times.

In a preferred embodiment of the multi-component cartridge, the pressure chamber contains compressed gas which acts on the extrusion piston. In this case, the pressure chamber of the multi-component cartridge can be filled either in the factory during manufacture or on site by the user with the compressed gas. As compressed gas, for example, compressed air can be used. Depending on the volume of the

Pressure chamber as well as from the pressure of the compressed medium, the

Pressure chamber once or more times filled with the pressurized gas to squeeze the components of the flowable mass completely from the multi-component cartridge. It is also possible to permanently connect the pressure chamber of the multi-component cartridge with an external compressed gas reservoir, but this has the disadvantage that the user is restricted in its freedom of movement. Another advantage of the use of compressed gas is that the multi-component cartridge and / or the extruded flowable mass in case of leaks of

Multi-component cartridge should not be contaminated. In a preferred embodiment of the invention, the outlet opening of the multi-component cartridge has an outlet valve. The discharge valve in the closed state prevents leakage of the pressurized components of the flowable mass from their chambers. It is apparent for dispensing the fiustfähigen mass, whereby its components are squeezed out of their chambers by moving the squeeze piston to the head of the cartridge housing through the exit port of the multicomponent cartridge and fed to a static mixer attached to the header of the multicomponent cartridge. After opening the outlet valve, the compressed medium located in the pressure chamber of the multi-component cartridge expands and displaces the extrusion piston for squeezing the flowable mass.

The at least two chambers of the multi-component cartridge for storing the at least two components of the flowable mass each have outlet openings for the components. The outlet openings may be arranged side by side and / or one inside the other, wherein each outlet opening is closable with an outlet valve. An advantageous development of the invention provides that the at least two chambers of the multi-component cartridge have a common outlet opening for the flowable mass, at which a common

Outlet valve is provided for the at least two components of the flowable mass.

This has the advantage that at least one outlet valve can be saved on the cartridge housing, which leads to a reduction in the production costs of the multicomponent

Cartridge leads. For this purpose, outlet channels of the chambers of the multi-component cartridge are designed so that they open into the single outlet opening of the multi-component cartridge, on which the common outlet valve is arranged. Thus, it is particularly easy to provide at the outlet opening a nozzle or static mixer with a trigger for actuating the valve, whereby the

Multi-component cartridge is easy to handle.

In another preferred embodiment of the invention, at least one of the two inherently stable chambers of the multi-component cartridge is deformable in the longitudinal direction such that one of the outlet opening is opposite

Chamber bottom of the deformable chamber for squeezing out the components Outlet opening of the chamber is movable. It has proven to be advantageous for a chamber wall of the chamber to be formed at least partially bellows-like.

The chamber behaves when pressing the component substantially as a known one-component cartridge. It has a tubular or bottle-like shape and a constant over its length cross-sectional area, whose

Chamber wall is formed at least partially bellows. In this way, a defined deformation of the chamber wall is ensured with a substantially constant outer diameter when the component is pressed out of the chamber.

Furthermore, only one extrusion piston is needed, which closes the outer chamber sealingly opposite the head piece and thereby enables a particularly simple construction of the multi-component cartridge. The chamber bottom of the deformable inner chamber is supported on the side of the common extrusion piston pointing in the direction of the head piece, whereby the inner chamber is compressed (compressed) in the longitudinal direction when the extrusion piston is displaced towards the outlet opening.

In a particularly preferred embodiment of the invention, the at least two

Chambers of the multi-component cartridge, which extend in the longitudinal direction of the cartridge housing into each other, in particular arranged parallel to each other in the cartridge housing. As a result of this advantageous arrangement, the extrusion pistons for the two chambers can be arranged parallel to one another and displaced parallel to each other for pressing out the flowable mass, whereby the outlet pistons can be easily sealed off to the associated chamber walls of the chambers or to the outer wall of the cartridge housing.

The invention will be explained in more detail with reference to three illustrated in the drawings embodiments. The illustrated figures are to be understood as simplified schematic representations for explaining the invention. Show it:

1 shows an axial section of a first Mehrkomponentenπ- invention

Cartridge with two co-axially arranged non-deformable chambers in one-valve design; FIG. 2 shows an axial section of a second multicomponent

A cartridge with an outer non-deformable and a coaxially arranged deformable chamber in one-valve design; and

FIG. 3 shows an axial section of a third multicomponent

Cartridge with an outer non-deformable and an eccentrically arranged deformable chamber in two-valve design.

In the multi-component inventive composition shown in FIGS.

Cartridges 1 are each provided two separate chambers 2, 3 for separate storage and for the common pressing of two components, not shown, a flowable, pasty mass. The chambers 2, 3 for the components are arranged in a cylindrical cartridge housing 4 with a front head piece 5 and a rear bottom 6, wherein the head piece 5 and the

Floor 6 are tightly connected to an outer wall 7 of the multi-component cartridge 1.

The head piece 5, the bottom 6 and the outer wall 7 of the cartridge housing 4 of the multi-component cartridge 1 can be made of metal or plastic. The

Chambers 2, 3 extend in the cartridge housing 4 in the longitudinal direction of the

Bottom 6 to the head piece 5 and have a constant circular over its length

Cross-sectional area on. They are in one another, in particular parallel to each other in the

Cartridge housing 4 of the multi-component cartridge 1 are arranged and have at their front, the head piece 5 facing sides outlet channels 8, 9 for the

Components which open at the two-valve design in outlet openings 10, 10 '. In the Einlaßausführungen shown in Figures 1 and 2 open the

Exit channels 8, 9 in a common outlet opening 10, in the multi-valve embodiment shown in Figure 3, the outlet channels 8, 9 open into their own, each side adjacent outlet openings 10, 10 '. In the single-valve embodiment according to FIG. 1, the chambers 2, 3 are arranged coaxially with one another.

According to the shape and the embodiment of the cartridge housing 4 and the

Chambers 2, 3, the multi-component cartridge 1 ejection piston 11 and 1 1, 1 1 'with circular cross-sectional areas, which are arranged on a bottom 6 facing the end of the chambers 2, 3. However, it is also possible, the cartridge housing 4, the chambers 2, 3 and the extrusion piston 1 1 or 11, 11 'of the multi-component cartridge 1 form with other cross-sectional geometries.

On the head piece 5 of the cartridge housing 4 outlet openings 10, 10 'are arranged, through which the components of the flowable mass, not shown, are pressed. Circumferentially around the outlet opening 10, 10 'are each a mounting flange 12 is formed on the head piece 5 on the opposite sides of the chambers 2, 3. The mounting flange 12 is used for releasably securing a in the

Drawing not shown static mixer and / or a cap, not shown, on the multi-component cartridge. 1

As shown in FIG. 1, the extrusion pistons 11, 11 'are arranged at a distance from the bottom 6 of the cartridge housing 4 at the ends of the chambers 2, 3 facing the bottom 6 of the multicomponent cartridge 1. The extrusion pistons 11, 11 are in the non-deformable chambers 2, 3 of the multi-component cartridge

1 longitudinally displaceable and sealed to chamber walls 7, 13 by seals, not shown. The bottom 6 forms with the extrusion piston 11, 11 'and the adjoining areas of the chamber walls 7, 13 pressure chambers 14, 15 for receiving a pressure gas, not shown in the drawing, which is provided to build a squeezing pressure for squeezing the flowable mass and with the Expressing piston 1 1, 11 'is in operative connection.

The pressure chambers 14, 15 are separated from the chambers 2, 3 by the squeeze pistons 11, 11 'with the components stored therein and have at the bottom 6, which limits the pressure chambers 14, 15 on the opposite side of the chambers 2, 3; not shown inlet openings with a valve for filling the pressure chambers 14, 15 with the pressurized gas. The pressure of the compressed gas, which may be compressed air for example, acts on the extrusion pistons 11, 11 'in the direction of the outlet opening 10 and builds up a pressure corresponding to the pressure of the compressed gas in the chambers 2, 3.

So that the components are not already pressed out of the chambers 2, 3 during the filling of the pressure chambers 14, 15, an outlet valve 16 is provided at the outlet opening 10 of the multicomponent cartridge 1, which closes the outlet opening 10 and prevents inadvertent outflow of the components. For discharging the flowable mass is in the region of the outlet valve sixteenth arranged a trigger 17, with which the user can open the outlet valve 16. By actuating the trigger 17, the outlet valve 16 is opened, so that the components are pressed out of the multi-component cartridge 1 by the pressure of the compressed gas through the outlet opening 10. The extrusion pistons 11, 11 "are moved continuously and uniformly in the direction of the head piece 5 of the cartridge housing 4 by the expanding compressed gas.

FIGS. 1, 2 show a one-valve embodiment of the multicomponent cartridge 1 according to the invention, in which the common outlet opening 10 for the components of the flowable mass into which the outlet channels 8, 9 of the chambers 2, 3 open and with which the chambers 2, 3 communicate, closed with a common outlet valve 16 and is apparent. The multi-component cartridge 1 shown in Figure 1 has two non-deformable chambers 2, 3 with fixed chamber walls 7, 13 which are arranged coaxially in the cartridge housing 4 and on the outlet channels 8, 9 opposite sides by two also coaxially arranged Expressing piston 1 1, 11 'are limited. Opposite the chambers 2, 3, the two communicating pressure chambers 14, 15 are provided.

FIG. 2 shows another embodiment of the multicomponent

Cartridge 1. It differs from the embodiment shown in Figure 1 in that the inner chamber 3 of the cartridge housing 4 has no fixed chamber wall 13. The chamber 3 is made in one piece as a blow molding and in the longitudinal direction of the cartridge housing 4 compressible (compressible). The inner chamber 3 has on the side facing the bottom 6 of the cartridge housing 4 a chamber bottom 18, which is opposite to the outlet opening 10 and is movable for pressing the component stored therein to the outlet opening 10. The chamber wall 13 of the inner chamber 3 is bellows-shaped over its entire length, so that the chamber wall 13 is defined when moving the chamber bottom 18 in the direction of the outlet opening 10 is compressed defined.

The chamber bottom 18 of the inner chamber 3 abuts against the extrusion piston 11 of the multi-component cartridge 1, which closes the chamber 2 encompassing the inner chamber 3 on the side opposite the head piece 5. When the flowable mass is extruded from the multicomponent cartridge 1, the pressurized gas is pressed against the extrusion piston 11, the components from both chambers 2, 3 evenly in the direction of the head piece 5 and in the outlet opening 10 of the multi-component cartridge 1. He presses the inner chamber 2 together axially. The multi-component cartridge 1 from FIG. 2 requires only one pressure chamber 14 and one extrusion piston 11.

FIG. 3 shows a third embodiment of a multicomponent cartridge 1 according to the invention in a two-valve design. The construction and mode of operation of the multi-component cartridge 1 essentially corresponds to the embodiment shown in FIG. 2, which is described above. However, it differs from this in that the inner chamber 3 is arranged eccentrically in the outer chamber 2 of the cartridge housing 4 and the outlet channels 8, 9 of the chambers 2, 3 do not open into a common outlet opening 10. Instead, the head piece 5 of the cartridge housing 4 has two separate outlet openings 10, 10 'for the separate chambers 2, 3, with which the chambers 2 and 3 communicate. At the outlet openings 10, 10 'is ever one

Outlet valve 16, 16 'is provided, which is apparently for discharging the flowable mass and to which the user can open simultaneously with a common trigger 17.

Claims

claims 1. A multi-component cartridge (1) for separately storing and for jointly pressing at least two components of a flowable mass, with a cartridge housing (4) having at least two chambers (2, 3) for receiving the components, with a head piece (5), which has an outlet opening (10) for the flowable mass, with which the chambers (2, 3) communicate and with at least one head piece (5) opposite, in the cartridge housing (4) displaceable extrusion piston (11) for pressing out the components, characterized in that the cartridge housing (4) has a device for building up a squeezing pressure for squeezing the flowable mass, which is arranged on a side of the squeezing piston (11) facing away from the head piece (5) and which is connected to the Expressing piston (11) is in operative connection. 2. Multi-component cartridge according to claim 1, characterized in that the device for building the discharge pressure has a pressure chamber (14, 15) for receiving a compressed medium, which in Cartridge housing (4) from the extrusion piston (1 1) of the chambers (2, 3) is separated for the components of the flowable mass. 3. Mehrkomponeπten cartridge according to claim 1, characterized in that the pressure chamber (14, 15) contains compressed gas, which acts on the extrusion piston (11). 4. Multi-component cartridge according to claim 2, characterized in that the outlet opening (10) has an outlet valve (16). 5. Multi-component cartridge according to claim 1, characterized in that the at least two chambers (2, 3) extend in the longitudinal direction of the multi-component cartridge (1) and are arranged one inside the other, in particular parallel to one another in the cartridge housing (4). 6. Multi-component cartridge according to claim 4, characterized in that the at least two chambers (2, 3) of the multi-component cartridge (1) have a common outlet valve (16) for the at least two components of the flowable mass, at a common outlet opening (IO) is arranged. 7. multi-component cartridge according to claim 5, characterized in that at least one of the at least two chambers (2, 3) of the multi-component cartridge (1) for squeezing the component contained in the flowable mass in the longitudinal direction compressible (compressible). 8. Multi-component cartridge according to claim 7, characterized in that a chamber wall (13) of the compressible chamber (3) is at least partially formed bellows-shaped.