HEAD PART FOR A CARTRIDGE AND CARTRIDGE

Abstract

A head part for a cartridge is provided for interacting with a dispensing device. The head part has a first receiving region for interacting with a first container and a second receiving region for interacting with a second container. The first receiving region is connected to a first channel and the second receiving region is connected to a second channel which is separated from the first channel at least in regions. A control device is arranged in at least one of the channels for controlling a volume flow of a composition guided through the corresponding channel. A cartridge for a dispensing device has such a head part.

Claims

1: Head A head part for a cartridge provided for interacting with a dispensing device, the head part having: a first receiving region for interacting with a first container, and a second receiving region for interacting with a second container, the first receiving region being connected to a first channel and the second receiving region being connected to a second channel which is separated from the first channel at least in regions, wherein a control device is arranged in at least one of the first channel or the second channel for controlling a volume flow of a composition guided through a corresponding one of the first channel or the second channel.

2: The head part according to claim 1, wherein the control device is designed to prevent the composition from flowing back into the first container or the second container.

3: The head part according to claim 1, wherein the control device has a spring device.

4: The head part according to claim 3, wherein the control device is designed as a non-return device.

5: The head part according to claim 1, wherein the first channel and/or the second channel has a substantially circular cross-section.

6: The head part according to claim 1, wherein the first channel or the second channel having the control device is separated from the other of the first channel or the second channel and a corresponding one of the first receiving region or the second receiving region downstream of the control device.

7: A cartridge for a dispensing device, having: the head part according to claim 1, at least one first container, and the second container, wherein the at least one first container has a first chamber for receiving a first composition and the second container has a second chamber for receiving a second composition.

8: The head part according to claim 4, wherein the non-return device is a non-return valve.

Description

[0020] In the drawings, identical and equivalent components are provided with the same reference signs. In the drawings:

[0021] FIG. 1 is a three-dimensional illustration of a cartridge designed for interacting with a dispensing device, which has two containers each connected to a head part;

[0022] FIG. 2 is a highly simplified sectional view of a detail of the head part according to FIG. 1 in isolation, a control device designed as a non-return valve being arranged in a channel of the head part; and

[0023] FIG. 3 is a three-dimensional view of the head part according to FIG. 1 and FIG. 2, a non-return valve which can be arranged in a channel of the head part being visible.

EMBODIMENTS

[0024] FIG. 1 shows a cartridge 1 having a head part 2 to which two containers 3, 4 are connected in the present case. The cartridge 1 is designed to interact with a dispensing device by means of which compositions located in the containers 3, 4 can be manually or automatically dispensed to the desired extent.

[0025] The cartridge 1 contains, for example, a two-component mortar composition, it being possible for a curable resin component to be arranged in one container 3 of the cartridge 1 and a curing component to be arranged in the other chamber 4 that is arranged separately from the first chamber in a reaction-inhibiting manner. The composition produced after mixing the curable resin component and the curing component is used, for example, as an injection mortar for the chemical anchoring, for example, of metal elements in mineral substances, in particular structures made of brickwork, concrete or natural stone. In this case, the boreholes which are correspondingly required for fastening the anchoring means are first introduced into the mineral substrate, after which the curable resin component is mixed with the curing component of the two-component mortar composition and introduced into the borehole, whereupon the anchoring means to be fastened is inserted and adjusted, and the mortar composition is subsequently cured.

[0026] The compositions are each arranged in chambers of the containers 3, 4, the containers 3, 4 in the present case each having a substantially cylindrical base body 6 and 7, respectively, with a first end wall 8 and 9, respectively, and an opposite second end wall 10 and 11, respectively. The first end wall 8 or 9 has a dispensing opening or a region provided for releasing the composition located in the relevant container 3 or 4. In the present case, the containers 3, 4 are designed as containers 3, 4 made at least partially, in particular almost completely, of films; in an alternative embodiment, they can also be designed as so-called hard cartridges or the like.

[0027] In the present case, the head part 2 has a first receiving region 13 and a second receiving region 14 spaced apart from one another, the first receiving region 13 being provided for connecting the first container 3 to the head part 2 and the second receiving region 14 being provided for connecting the second container 4 to the head part 2. In the embodiment shown, the receiving regions 13 and 14 are arranged without a direct connection to one another.

[0028] In an alternative embodiment, it may also be the case that one container of the cartridge is arranged within the other container of the cartridge. The cartridge can be attached to the head part together with both containers, the head part in turn having a first receiving region associated with the first container and a second receiving region associated with the second container. One receiving region is encompassed by the other receiving region, the receiving regions being separated from one another such that the relevant receiving region is exclusively in contact with the associated container and thus with the material stored in the relevant container.

[0029] A channel 15 or 16 is associated with both the first receiving region 13 and the second receiving region 14, the first channel 15 being connected to the first receiving region 13 and not being in contact with the second receiving region 14. The second channel 16 is connected to the second receiving region 14 and accordingly has no contact with the first receiving region 13. This ensures in the present embodiment that the compositions located in the containers 3, 4 cannot come into contact with one another before they exit an outlet opening 18 of the head part 2.

[0030] The head part 2 has a substantially tubular outlet nozzle 17 having a substantially circular cross-section. The channels 15, 16 are arranged in the outlet nozzle 17, the channels 15, 16 extending separately from one another within the outlet nozzle 17. In the present case, the second channel 16 has a circular cross-section and the first channel 15 has a substantially crescent-shaped cross-section, the first channel 15 being separated from the second channel 16 by a wall 19. However, in principle the shape of the cross-sections of the channels 15, 16 can be selected as desired.

[0031] The outlet nozzle 17 thus has the two channels 15 and 16 which are in fluid connection with the respective receiving regions 13 and 14 and are separated from one another by the wall 19. The wall 19 extends from a connecting piece 21 separating the receiving regions 13 and 14 up to the outlet opening 18 of the head part 2.

[0032] The head part 2 is made in particular from a material to which the compositions stored in the containers do not adhere. Alternatively, the head part 2 can have a non-stick coating, particularly in the regions that interact with the compositions, such as the channels 15, 16.

[0033] A connection region 19 for a conventionally designed static mixer (not shown in detail) is arranged on an outer periphery of the outlet nozzle 17 or outlet pipe. In the present case, the connection region 19 is designed as a thread, such that a mixer can be arranged on the head part 2 in a screwing movement. Such a mixer has a structure which leads to the most favorable possible mixing of the compositions guided via the channels 15, 16. Due to the structure of the mixer, the compositions, which are guided via the channels 15, 16 and come from the containers 3, 4, come into contact with one another for the first time in the direction of flow.

[0034] For example, in the case of compositions in the containers 3, 4 having highly different viscosities and/or when there are pressure differences in the containers 3, 4, undesired deviating volume flows of one or both compositions can occur. This may cause a composition to pass through the static mixer into the unassociated channel 15 or 16 and possibly into the corresponding other container 3 or 4. This can have undesirable effects, such that, for example, there is cured material in a channel 15 or 16. Furthermore, there may be a mixing problem, incomplete curing or curing in a container 3 or 4. The last-mentioned situation is particularly relevant in chemical systems in which a chemical reaction of the compositions continues after initiation even without the further presence of a composition.

[0035] In order to prevent the compositions stored in the containers from coming into contact with one another in an undesired manner in the region of the head part 2 or in the containers 3, 4, a control device 22 designed here as a non-return valve is arranged in the second channel 16. The non-return valve 22 reliably prevents the composition located in the container 3 and conveyed through the outlet opening 18 via the first channel 15 from being guided upstream through the non-return valve 22. The composition located in the container 3 is thus reliably prevented from reaching the second container 4.

[0036] The non-return valve 22 is shown schematically in FIG. 2 and in a simplified manner in an unmounted state in FIG. 3. The non-return valve 22 has a spring device 23 which closes the second channel 16 without applying an external force. The non-return valve 22 releases a volume flow through the second channel 16 only when an external force applied to the non-return valve 22 on the container side exceeds the spring force of the spring device 23. The composition stored in the container 4 can thus be guided through the second channel 16 in the direction of the outlet opening 18 of the head part 2 only when a defined minimum pressure present in the second container 4 is exceeded. This is particularly advantageous when using film containers, since it ensures that the container rests against a wall of a dispensing device to the desired extent and that the film container is folded as well as desired during a dispensing process.

[0037] The non-return valve 22 can also reliably prevent an undesired and/or uncontrolled flow of the composition from the container 4 and an inflow of the composition of the first container 3 into the second container 4 and thus the occurrence of a reaction of the compositions in the second container 4.

[0038] As an alternative to the use of a non-return valve 22, a spring-loaded flap, for example, can also be provided, which allows the composition to flow out of the second container 4 in the direction of the outlet opening 18 and prevents a composition from flowing in the direction of the second container 4 and thus prevents backflow in the direction of the second container 4.

[0039] Furthermore, such a control device may be likewise arranged in the first channel 15 in order, for example, to also reliably prevent the composition from flowing back into the first container 3.