Device for applying adhesives

Abstract

The present invention relates to a device (1), in particular an application head (7), for dispensing adhesives (K). The device (1) has valves (2, 3) associated with the adhesives (K), wherein the valves (2, 3) of the different adhesives (K) are grouped into valve groups (4). Each valve group (4) has a chamber (5) through which the adhesives (K) can flow, so that the adhesives (K) can be dispensed by means of dispensing points (6) connected to the chamber (5). The flow paths (P) of the adhesives (K) are separated from each other upstream of the chambers (5). The invention also relates to a system (100) with such a device (1). Furthermore, the invention relates to a method for operating such a device (1).

Description

[0001] The present invention relates to a device for dispensing a first adhesive and a second adhesive, which includes valves for dispensing the adhesives. The invention also relates to a system comprising such a device. Furthermore, the invention relates to a method for operating such a device.

[0002] In numerous processes, the dispensing and, in particular, the application of adhesives to substrates is necessary. For this purpose, devices with valves can be used to regulate the flow of the adhesives.

[0003] Such a device is usually designed for applying one type of adhesive. If a different, second adhesive is to be applied, the entire device must first be rinsed to prevent the adhesives from mixing.

[0004] To apply two adhesives, it is also conceivable to combine two such devices in one unit, with each device being designed to apply its corresponding adhesive.

[0005] When applying moisture-active adhesives, it is necessary to prevent or at least reduce contact of the adhesive with moisture, and especially with the ambient air, if no adhesive is dispensed.

[0006] The present invention addresses the objective of providing improved or at least alternative embodiments of a device of the aforementioned type, of a system comprising such a device, and of a method for operating such a device. In particular, the present invention addresses the objective of providing embodiments of the device, the system, and the method that are characterized by increased efficiency.

[0007] This problem is solved according to the invention by the subject matter of the independent claims. Advantageous embodiments are the subject matter of the dependent claims.

[0008] The present invention is therefore based on the fundamental idea of ​​dispensing adhesives in different work steps by essentially keeping them separate within the same device, but dispensing them via a common dispensing point, whereby the volume between the separate guides and the common dispensing point is kept as small as possible. This has the advantage that when switching between dispensing one adhesive and another, only this volume needs to be flushed. This results in economical operation and consequently increased efficiency, while simultaneously achieving an improved environmental footprint. Furthermore, this method eliminates or at least reduces the need to store the dispensing points in an inert medium to prevent reactions of the currently unused adhesive with the environment, particularly with moisture. This leads to improved efficiency and an even better environmental footprint.

[0009] According to the inventive concept, a device for dispensing, in particular for applying, two adhesives has valves for dispensing the adhesives. The adhesives are hereinafter also referred to as the first adhesive and the second adhesive. The device has first valves for dispensing the first adhesive and second valves for dispensing the second adhesive. A flow path of the first adhesive, hereinafter also referred to as the first flow path, passes through the first valves. A flow path of the second adhesive, hereinafter also referred to as the second flow path, passes through the second valves. The device has groups of valves, each group comprising at least one first valve and at least one second valve. Each valve group has a chamber through which both flow paths pass downstream of the respective associated valve.This means that the first flow path leads through the chamber downstream of the associated first valve. Additionally, the second flow path leads through the chamber downstream of the associated second valve. The flow paths upstream of the chamber are separated from each other. Each valve group also has at least one point for dispensing the adhesives, which is hereinafter also referred to as the dispensing point. This dispensing point is connected to or part of the chamber of the associated valve group, so that during operation the adhesives leave the device via the dispensing points of the valve groups and are thus dispensed.

[0010] Each chamber advantageously forms a volume up to the at least one dispensing point through which both adhesives can flow. This means that, during operation, either the first or the second adhesive can flow through the chamber and via the at least one associated dispensing point, and thus through the volume. Since the flow paths are separated upstream of the chamber, the reduction and shortening of the common flow volume described above occurs. This results in the aforementioned advantages of increased efficiency and environmentally friendly operation, while simultaneously simplifying operation.

[0011] The device can, in principle, be designed in any way imaginable.

[0012] Advantageously, the device is designed as an application head for applying the adhesives. The dispensing points, in particular, can be designed accordingly.

[0013] The respective dispensing point is expediently designed as an opening and can therefore also be referred to as a dispensing opening.

[0014] The respective dispensing point preferably forms the outermost point of the flow path of the respective adhesive within the device, and preferably also within an associated system. This means, in particular, that the adhesives do not contact any further components of the device, and preferably also of the associated system, after flowing from the dispensing points. Consequently, when changing the adhesive dispensing point, the device only needs to be flushed from the respective chamber up to the respective dispensing points, i.e., the aforementioned volume of the respective valve group. Since this also results in a reduction of the volume to be flushed, this approach leads to particularly high efficiency and environmentally friendly operation.

[0015] As explained above, the respective dispensing point can be part of the associated chamber. In this case, the dispensing point is preferably designed as an opening, for example as a through-hole, in the chamber through which the adhesives leave the device.

[0016] Similarly, as explained above, the dispensing point can be connected to the chamber, i.e., a separate component, for example in the form of an attachment. In this case, the dispensing point is preferably directly connected to the chamber. This results in the smallest possible volume that needs to be flushed when changing the adhesive dispensing point.

[0017] The adhesives can be dispensed, and in particular applied, onto a substrate during operation, especially in an associated system. The device can be moved relative to the substrate, for example a plate, to apply elongated strips of adhesive, in particular beads, to the substrate.

[0018] The adhesive used can, in principle, be of any type.

[0019] In particular, the adhesive in question may be moisture-active. This means that, especially after dispensing or application, the adhesive may react with moisture, particularly from the air, in order to harden and / or form an adhesive bond.

[0020] For example, the adhesive in question may be a one-component adhesive, i.e. a so-called "1K" adhesive, especially polyurethane-based.

[0021] It is advantageous for the first adhesive and the second adhesive to differ, for example, in their composition and / or other properties.

[0022] In preferred embodiments, the dispensing points of the different valve groups are fluidically separated from one another. This means that there is no direct fluidic connection between the dispensing points of the different valve groups, and thus also between the chambers of the different valve groups, but only via the flow paths upstream of the valves. Consequently, the respective adhesive cannot flow between the different valve groups. As a result, flushing such a connection between the different valve groups is eliminated. This leads to further increased efficiency and a better environmental footprint.

[0023] The device advantageously comprises a carrier in which the valves are received. For this purpose, the carrier has recesses. The respective flow path passes through the carrier.

[0024] Preferably, the carrier for each valve group has at least one associated outlet, hereinafter also referred to as a carrier outlet, through which the flow paths downstream of the valves of the valve group lead, so that the adhesives leave the carrier via the at least one carrier outlet during operation. This means, in particular, that the respective carrier outlet is located at the point downstream of which both flow paths converge. This results in a reduction of the common flow volume and thus increased efficiency and improved environmental performance, while simultaneously allowing for a more compact and simplified design of the device.

[0025] Preferably, each carrier outlet opens directly into the chamber of the associated valve group. This further reduces the overall flow volume, thereby improving efficiency and environmental performance, and allowing for an even more compact device.

[0026] In advantageous embodiments, the carrier has a single associated carrier outlet for at least one of the valve groups, preferably for each valve group, through which the first and second flow paths pass and upstream of which the flow paths are separated. This leads to a further reduction in the volume through which the adhesives can flow together, and thus to a further increase in efficiency and an improvement in the environmental footprint.

[0027] The device can have an attachment mounted on the carrier for at least one of the valve groups, for example, for the respective valve group, which, together with the carrier, forms at least part, preferably the entire, chamber of the valve group. In particular, the attachment can be mounted on the carrier in the area of ​​the at least one associated carrier outlet. Besides a simplified and compact design of the device, this leads to a further limitation of the volume through which the adhesives can flow. Consequently, efficiency is increased and the environmental footprint is improved.

[0028] It is conceivable that at least one of the essays, in particular the respective essay, forms the entire associated chamber together with the holder.

[0029] The device expediently has a dedicated channel for each adhesive to supply the corresponding valves, which is hereinafter also referred to as a supply channel. This means that the device has a first supply channel for supplying the first valves with the first adhesive. The first flow path upstream of the first valves passes through the first supply channel. This also means that the device has a second supply channel for supplying the second valves with the second adhesive. The second flow path upstream of the second valves passes through the second supply channel.

[0030] The respective supply channel can, in principle, be designed in any way imaginable.

[0031] In advantageous versions, the support forms at least one of the supply channels, at least partially. This means, in particular, that the support has at least one cavity that corresponds to a section of such a supply channel. The result is a simplified, cost-effective, and compact design of the device.

[0032] The carrier can be designed and manufactured in any way.

[0033] Advantageously, the support has a profile, in particular an extruded profile. Specifically, the support can be designed as such a profile, for example, as an extruded profile. Besides a simple and weight-reduced design of the device, the supply channels and the receptacles can be designed and manufactured in a simple and precise manner in this way.

[0034] Preferably, the first valves are arranged along a first row and the second valves along a second row opposite the first row, particularly parallel to it. The first and second valves of each valve group are spaced apart from each other transversely or inclined to the extent of the rows, and in particular arranged opposite each other. This also means that the valve groups follow one another along the extent of the rows.

[0035] In principle, each valve group can have any number of output points.

[0036] Advantageously, at least one of the valve groups, and in particular each individual valve group, has at least two dispensing points. Consequently, the number of dispensing points is greater than the number of valves. The result is a cost-effective design of the device.

[0037] The dispensing points of at least one of the valve groups can be part of an order segment. In particular, it is conceivable that each valve group has an order segment that includes the associated dispensing points.

[0038] At least one of the order segments can be part of the attachment of the associated valve group. It is conceivable that the attachment could be designed in two or more parts for this purpose.

[0039] As explained above, the device can be part of a system for dispensing adhesives, in particular for applying the adhesives.

[0040] The system advantageously includes a corresponding conveying device, such as a pump, for each adhesive, which conveys the adhesive along the corresponding flow path. This means that the system has a first conveying device which, during operation, conveys the first adhesive along the first flow path. The system also has a second conveying device which, during operation, conveys the second adhesive along the second flow path.

[0041] The device, in particular the system, is expediently operable in different operating modes. In one operating mode, hereinafter also referred to as the first operating mode, only the first adhesive is dispensed via the dispensing points. In another operating mode, hereinafter also referred to as the second operating mode, only the second adhesive is dispensed via the dispensing points.

[0042] In particular, in the first operating mode, the first conveying unit is in operation and the second conveying unit is out of operation. Alternatively or additionally, in the first operating mode, it is advantageous for the first valves to be open and the second valves to be closed.

[0043] In particular, in the second operating mode, the second conveying unit is in operation and the first conveying unit is out of operation. Alternatively or additionally, in the second operating mode, it is advantageous for the second valves to be open and the first valves to be closed.

[0044] When switching from the first operating mode to the second operating mode, the chambers are preferably rinsed first, up to the dispensing points. It is particularly conceivable to rinse the chambers up to the dispensing points with the second adhesive.

[0045] When switching from the second operating mode to the first operating mode, the chambers up to the dispensing points are preferably rinsed first. It is conceivable to rinse the chambers up to the dispensing points with the first adhesive.

[0046] When no adhesive is dispensed, and in particular when no adhesive is applied, i.e., when the device, and in particular the system, is in a state hereinafter also referred to as standby mode, an inert medium is advantageously used to prevent or at least reduce any reaction of the adhesives with the environment and / or with moisture. For this purpose, the dispensing points are preferably immersed in the inert medium in standby mode.

[0047] The inert medium can be of any type, provided that it prevents or at least reduces contact and / or reaction of the adhesives with the environment and / or with moisture.

[0048] For example, the medium could be an anhydrous oil.

[0049] It is understood that the device can also be designed to dispense three or more adhesives, i.e., at least two adhesives. In this case, the device has corresponding valves for each adhesive.

[0050] Preferably, each valve group has at least one valve for the respective adhesive, wherein the flow paths guide at least two of the adhesives, in particular the respective adhesive, through the chamber and are separated from each other upstream of the chamber. Furthermore, preferably at least two of the adhesives, more preferably the respective adhesive, exit the device via the dispensing points of the valve groups.

[0051] It is understood that, in addition to the device, the system is also part of the scope of this invention. Likewise, the method for operating the device, and in particular the system, is part of the scope of this invention.

[0052] Further important features and advantages of the invention will become apparent from the dependent claims, the drawings and the associated description of the figures based on the drawings.

[0053] It is understood that the features mentioned above and those to be explained below can be used not only in the combinations specified, but also in other combinations or on their own, without leaving the scope of the present invention.

[0054] Preferred embodiments of the invention are shown in the drawings and are explained in more detail in the following description, wherein identical reference numerals refer to identical or similar or functionally identical components.

[0055] They show, schematically, each one Fig. 1 a highly simplified, circuit diagram-like representation of a device for dispensing adhesives in a system, Fig. 2 an isometric view of the system with the device, Fig. 3 a sectional view of the device in the area of ​​a valve group, Fig. 4 a in Figure 3 Sectional view of the valve group indicated with IV-IV.

[0056] One in the Figures 1 to 4 The device shown as an example 1 serves for the dispensing, in particular the application, of adhesives K (see Figure 1 In the illustrated embodiments, two adhesives K are dispensed by means of the device 1, which are hereinafter also referred to as the first adhesive K1 and the second adhesive K2. The adhesives K can be moisture-active, i.e., they react with moisture, for example from the air, after dispensing in order to cure and / or form an adhesive bond.

[0057] The device 1 has valves 2 and 3 for dispensing the respective adhesive K, through which a flow path P of the respective adhesive K passes. That is, the device 1 has first valves 2 for dispensing the first adhesive K1, through which a first flow path P1 of the first adhesive K1 passes. Furthermore, the device 1 has second valves 3 for dispensing the second adhesive K2, through which a second flow path P2 of the second adhesive K2 passes. The valves 2 and 3 are grouped such that the device 1 has valve groups 4, each valve group 4 comprising at least one first valve 2 and at least one second valve 3. In the Figure 1 In the exemplary embodiment shown, the device 1 has, purely by way of example, eight first valves 2 and eight second valves 3. In the embodiment shown Figure 1In the illustrated embodiment, each valve group 4 has a first valve 2 and a second valve 3. Thus, in this exemplary embodiment, the device 1 has eight valve groups 4.

[0058] In the Figure 2 In the illustrated embodiment, the device 1 has, purely by way of example, ten first valves 2 and ten second valves 3, wherein each valve group 4 comprises a first valve 2 and a second valve 3. Thus, the device 1 of the embodiment of Figure 2 ten valve groups 4 on. How Figure 2As can be seen, the first valves 2 and the second valves 2 can be arranged along parallel rows. Thus, the valve groups 4 can follow one another along the extent of the rows. In addition, the first valve 2 and the second valve 3 of the respective valve group 4 can be spaced apart from each other transversely or inclined to the extent of the rows, in particular opposite each other (see also Figure 3 ).

[0059] The device 1 can, as for example in the Figure 1 and 2 shown, is part of an appendix 100 for dispensing, in particular for applying, the adhesives K. Appendix 100 shows, as in Figure 1As shown, the system 100 has a conveying device 101, 102 for conveying the respective adhesive K along the associated flow path P. The system 100 thus has a first conveying device 101, which, during operation, conveys the first adhesive K1 along the first flow path P1. The system 100 also has a second conveying device 102, which, during operation, conveys the second adhesive K2 along the second flow path P2. The respective adhesive K can be stored in an associated reservoir 104.

[0060] Figure 3 shows a sectional view of the device 1 through such a valve group 4. For example Figure 3Each valve group 4 has a chamber 5 through which both flow paths P downstream of the associated valves 2, 3 pass. This means that the first flow path P1 downstream of the associated first valve 2 and the second flow path P2 downstream of the associated second valve 3 pass through chamber 5. Thus, during operation of the device 1, either the first adhesive K1 or the second adhesive K2 can flow through chamber 5. In contrast, the flow paths P upstream of chamber 5 are separated from each other. For example... Figure 3Each valve group 4 has at least one associated dispensing point 6 for the adhesives K, which is also referred to below as the dispensing point 6. In the illustrated embodiments, the dispensing points 6 are designed as openings and can therefore also be referred to as dispensing openings 6a. The respective dispensing point 6 is connected to or part of the associated chamber 5, so that the adhesives K leave the device 1 via the dispensing points 6 of the valve groups 4. This results in a separation of the adhesives K upstream of the chamber 5. When switching between the adhesives K, only the volume from the chamber 5 to the at least one associated dispensing point 6 needs to be flushed. This results in improved efficiency in the operation of the device 1 as well as an improved environmental footprint. As shown in Figure 1 is indicated and Figure 3As can be seen from the illustrations, in the illustrated embodiments the dispensing points 6 of the different valve groups 4 are fluidically separated from one another. This means that a direct flow of the adhesives K between the valve groups 4 does not occur and / or that a fluidic connection of the dispensing points 6 and thus also of the chambers 5 of the different valve groups 4 is only possible upstream of the associated valves 2, 3.

[0061] The device 1 allows the adhesives K to be dispensed in different operating modes. In one operating mode, hereinafter also referred to as the first operating mode, the first adhesive K1 is dispensed via the dispensing points 6. In contrast, in another operating mode, hereinafter also referred to as the second operating mode, the second adhesive K2 is dispensed via the dispensing points 6. In the first operating mode, the first valves 2 are opened and preferably the second valves 3 are closed. Furthermore, the first conveying unit 101 feeds the first adhesive K1, while the second conveying unit 102 may be out of operation. In the second operating mode, the second valves 3 are opened and preferably the first valves 2 are closed. In the second operating mode, the second conveying unit 102 feeds the second adhesive K2, while the first conveying unit 101 may be out of operation.

[0062] When switching from the first operating mode to the second operating mode, chambers 5 up to dispensing points 6, i.e., the aforementioned volumes, are first rinsed. This rinsing can be carried out using the second adhesive K2. When switching from the second operating mode to the first operating mode, chambers 5 up to dispensing points 6, i.e., the volumes, are first rinsed. This rinsing can be carried out using the first adhesive K1.

[0063] If none of the adhesives K are dispensed, i.e., if device 1 or system 100 is in a standby mode, the dispensing points 6 can be in a Figure 1 The device is immersed in the indicated inert medium M. This medium M could, for example, be an anhydrous oil.

[0064] In the illustrated embodiments, the respective dispensing point 6 forms the outermost point of the flow path P of the respective adhesive K in the device 1 and the system 100. Consequently, after flowing from the dispensing points 6, the adhesives K do not contact any further components of the device 1 and the system 100.

[0065] How especially the Figures 2 and 3 As can be seen, the device 1 in the illustrated embodiments is designed as an application head 7 for applying the adhesives K, for example in the form of strips or beads (not shown), to substrates not shown.

[0066] In the illustrated embodiments, the device 1, as in particular Figure 3The device 1 has a first supply channel 8, 9 for supplying the first valves 2, 3 with the respective adhesive K, which is hereinafter also referred to as supply channel 8, 9. This means that the device 1 has a first supply channel 8 for supplying the first valves 2 with the first adhesive K1. The first flow path P1 runs upstream of the first valves 2 through the first supply channel 8. The device 1 also has a second supply channel 9 for supplying the second valves 3 with the second adhesive K2. The second flow path P2 runs upstream of the second valves 3 through the second supply channel 9. The supply channels 8, 9 can in turn be supplied with the respective adhesive K via associated lines 105, 106 of the system 100, as shown in Figure 2indicated. For this purpose, the device 1 can have at least one associated fluidic connection 10, 11 for the respective supply channel 8, 9 (see Figure 2 ) to which the aforementioned lines 105, 106 can be connected. The device 1 can therefore have at least one first connection 10 for the first supply channel 8 and at least one second connection 11 for the second supply channel 9, such that the first adhesive K1 flows into the first supply channel 8 via the at least one first connection 10 and the second adhesive K2 flows into the second supply channel 9 via the at least one second connection 11. Consequently, the first flow path P1 leads through the at least one first connection 10 and the second flow path P2 through the at least one second connection 11.

[0067] In the illustrated embodiments, the device 1, as in particular Figure 3The carrier 12, which in the illustrated embodiments is designed as a profile 13, in particular as an extruded profile 14, can be removed. The valves 2, 3 are received in the carrier 12. For this purpose, the carrier 12 has receptacles 15 for the valves 2, 3; in the illustrated embodiments, each valve 2, 3 has its own corresponding receptacle 15. Figure 3 Furthermore, since it can be removed, the carrier 12 can at least partially form the supply channels 8, 9. In the illustrated embodiment, the supply channels 8, 9 are entirely formed by the carrier 12, which is locally hollow for this purpose. As in Figure 2 As indicated, the carrier 12 can have at least some of the connections 10, 11.

[0068] Carrier 12 indicates how Figure 3As can be seen, in the illustrated embodiments, the carrier 12 has at least one associated outlet 16 for each valve group 4, which is hereinafter also referred to as the carrier outlet 16. In the illustrated embodiment, the carrier 12 has, purely by way of example, a single associated carrier outlet 16 for each valve group 4. The flow paths P downstream of the valves 2, 3 lead through the carrier outlet 16, so that the adhesives K leave the carrier 12 via the carrier outlets 16 during operation. Upstream of the respective carrier outlet 16, the flow paths P are separated. In the illustrated embodiment, the respective carrier outlet 16 opens directly into the chamber 5 of the associated valve group 4.

[0069] The device 1 can, for example, Figure 3It can be taken from the carrier 12 that at least one of the valve groups 4 has an attachment 17 mounted on the carrier 12, which, together with the carrier 12, forms at least partially, and in the illustrated embodiment completely, the chamber 5 of the valve group 4. The attachment 17 is mounted on the carrier 12 in the area of ​​the associated carrier outlet 16. As shown in Figure 4 As indicated, each valve group 4 may have such an associated attachment 17.

[0070] Accordingly Figure 3 The at least one output point 6 of the respective valve group 4 cannot be part of chamber 5. The at least one output point 6 is as described in Figure 3 shown, preferably directly connected to chamber 5.

[0071] In the illustrated embodiments, at least one of the valve groups 4, in particular the respective valve group 4, has at least two output points 6, for example 3 output points 6 (compare Figure 4). The valve group 4 has an application segment 18 comprising the associated dispensing points 6, which in the illustrated embodiments is part of the attachment 17. For example Figure 3 As can be seen, essay 17 can be structured in multiple parts for this purpose.

Claims

1. Device (1), in particular an application head (7), for dispensing, in particular for applying, a first adhesive (K1) and a second adhesive (K2), - with first valves (2) for dispensing the first adhesive (K1), through which a first flow path (P1) of the first adhesive (K1) leads, - with second valves (3) for dispensing the second adhesive (K2), through which a second flow path (P2) of the second adhesive (K2) leads, - with valve groups (4), each comprising at least one first valve (2) and at least one second valve (3), - wherein each valve group (4) comprises a chamber (5) through which the first flow path (P1) downstream of the associated at least one first valve (2) and the second flow path (P2) downstream of the associated at least one second valve (3) lead, - wherein the flow paths (P) are separated from each other upstream of the chamber (5),- wherein each valve group (4) has at least one associated dispensing point (6) which is connected to or part of the chamber (5), such that during operation the adhesives (K) leave the device (1) via the dispensing points (6) of the valve groups (4).

2. Device according to claim 1, characterized by that the respective dispensing point (6) forms the outermost point of the flow path (P) of the respective adhesive (K) in the device (1).

3. Device according to claim 1 or 2, characterized by that the output points (6) of the different valve groups (4) are fluidically separated from each other.

4. Device according to one of claims 1 to 3, characterized by - that the device (1) has a carrier (12) with receptacles (15) in which the valves (2, 3) are received, - that the respective flow path (P) leads through the support (12), - thatthe carrier (12) for the respective valve group (4) has at least one associated carrier outlet (16) through which the flow paths (P) downstream of the valves (2, 3) of the valve group (4) lead, so that the adhesives (K) leave the carrier (12) via the at least one carrier outlet (16) during operation, - that the respective carrier outlet (16) opens into the chamber (5) of the associated valve group (4).

5. Device according to claim 4, characterized by that the carrier (12) for at least one of the valve groups (4), in particular for the respective valve group (4), has a single carrier outlet (16) through which the first flow path (P1) and the second flow path (P2) pass and upstream of which the flow paths (P) are separated.

6. Device according to claim 4 or 5, characterized by thatthe device (1) for at least one of the valve groups (4), in particular for the respective valve group (4), has an attachment (17) mounted on the carrier (12) which, together with the carrier (12), at least partially forms the chamber (5) of the valve group (4).

7. Device according to any one of claims 1 to 6, characterized by - that the device (1) has a first supply channel (8) for supplying the first valves (2) with the first adhesive (K1), through which the first flow path (P1) leads upstream of the first valves (2), - that the device (1) has a second supply channel (9) for supplying the second valves (3) with the second adhesive (K2), through which the second flow path (P2) leads upstream of the second valves (3).

8. Device according to claim 7 and one of claims 4 to 6, characterized by that the carrier (12) forms at least one of the supply channels (8, 9) at least partially.

9. Device according to any one of claims 4 to 8, characterized by that the support (12) has a profile (13), in particular an extruded profile (14), or is designed as such a profile (13), in particular an extruded profile (14).

10. Device according to any one of claims 1 to 9, characterized by that at least one of the valve groups (4), in particular the respective valve group (4), has at least two dispensing points (6).

11. Device according to claim 10, characterized by that at least one of the valve groups (4), in particular the respective valve group (4), has an order segment (18) having the associated output points (6).

12. System (100) for applying a first adhesive (K1) and a second adhesive (K2), - with a device (1) according to one of the preceding claims, - with a first conveying device (101) which, in operation, conveys the first adhesive (K1) along the first flow path (P1), - with a second conveying device (102) which, in operation, conveys the second adhesive (K2) along the second flow path (P2).

13. Method for operating a device (1), in particular an application head (7), for applying a first adhesive (K1) and a second adhesive (K2), wherein the device (1) comprises: • first valves (2) for dispensing the first adhesive (K1), through which a first flow path (P1) of the first adhesive (K1) passes; • second valves (3) for dispensing the second adhesive (K2), through which a second flow path (P2) of the second adhesive (K2) passes; • valve groups (4), each comprising at least one first valve (2) and at least one second valve (3); • wherein each valve group (4) comprises a chamber (5) through which the first flow path (P1) downstream of the associated at least one first valve (2) and the second flow path (P2) downstream of the associated at least one second valve (3) pass; • wherein the flow paths (P) are separated from each other upstream of the chamber (5).• wherein each valve group (4) has at least one associated dispensing point (6) which is connected to or part of the chamber (5), such that during operation the adhesives (K) leave the device (1) via the dispensing points (6) of the valve groups (4), - wherein in a first operating mode the first adhesive (K1) is dispensed via the dispensing points (6), - wherein in a second operating mode the second adhesive (K2) is dispensed via the dispensing points (6), - wherein when switching from the first operating mode to the second operating mode the chambers (5) up to the dispensing points (6) are first rinsed, - wherein when switching from the second operating mode to the first operating mode the chambers (5) up to the dispensing points (6) are first rinsed.

14. Method according to claim 13, characterized by - thatWhen switching from the first operating mode to the second operating mode, the chambers (5) up to the dispensing points (6) are rinsed with the second adhesive (K2), and / or - that When switching from the second operating mode to the first operating mode, the chambers (5) up to the dispensing points (6) are rinsed with the first adhesive (K1).

15. Method according to claim 13 or 14, characterized by that in a standby mode in which the device (1) does not apply any adhesive (K), the dispensing points (6) are immersed in an internal medium (M), in particular in an anhydrous oil.

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