IP Library › Granted Patent US 12678819
Granted Patent B2
US 12678819 · App. 18/249,743 · Granted Jul 14, 2026

Application device for preferably partially boosted application

Inventors: Frank Schnur (Bönningheim, DE); Carsten Schulz (Leingarten, DE); Bernd Locher (Knittlingen, DE); Lothar Rademacher (Bietigheim-Bissingen, DE)
B05C11/1036B05C5/0275B05C17/00566
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Quick Facts
Patent No.
US 12678819
App. No.
18/249,743
Granted
Jul 14, 2026
Kind
B2
Abstract

The disclosure relates to an application device, preferably for alternately applying a 2C material, comprising a first component material and a second component material, on the one hand and the first component material on the other hand, in particular onto a motor vehicle component, comprising preferably an application head and a first line section leading to an application nozzle, wherein the first line section comprises a mixer and a first line for a first component material and a second line for a second component material, wherein the first line and the second line are connected to the mixer and the mixer mixes the first component material and the second component material with each other for forming a 2C material. The application device is characterized in particular in that it comprises a second line section for the first component material to form an application bead of alternately the 2C material from the first line section and the first component material from the second line section.

Claims (49)

1 . An application device for alternately applying a 2C material, comprising:

an application head,

a first line section leading to an application nozzle, wherein the first line section comprises a mixer and a first line for a first component material and a second line for a second component material, wherein the first line and the second line are connected to the mixer and the mixer mixes the first component material and the second component material with each other for forming a 2C material, and

a second line section for the first component material to form an application bead of alternately the 2C material from the first line section and the first component material from the second line section,

wherein the first line comprises a controllable valve for opening or closing the first line and the second line comprises a controllable valve for opening or closing the second line and the first valve and the second valve are integrated in the application head before the mixer, and

wherein the application device comprises an application tube, wherein the mixer is arranged in the application tube and the second line section runs coaxially through the application tube along an entire length of the application tube.

2 . The application device according to claim 1 , characterized in that the second line section forms a bypass line for bypassing the mixer and/or leads downstream of the mixer to the application nozzle.

3 . The application device according to claim 2 , characterized in that

the application device is configured for alternately applying the 2C material on the one hand and the first component material omitting the second component material on the other hand, and/or

the second line section leads the first component material to the application nozzle omitting the second component material.

4 . The application device according to claim 1 characterized in that the second line section leads to the application nozzle, opens into the application nozzle and/or opens directly before the application nozzle.

5 . The application device according to claim 1 , characterized in that

the first line is connected to a first metering device, wherein the first metering device meters the first component material for the first line, and

the second line section is connected to a second metering device, wherein the second metering device meters the first component material for the second line section.

6 . The application device according to claim 1 characterized in that a common metering device is provided to meter the first component material for the first line and the first component material for the second line section.

7 . The application device according to claim 1 characterized in that the first component material for the first line is provided by a first material supply and the first component material for the second line section is provided by a second material supply.

8 . The application device according to claim 1 characterized in that a common material supply is provided to provide the first component material for the first line section and the first component material for the second line section.

9 . The application device according to claim 1 characterized in that the mixer is configured as a static mixer or dynamic mixer.

10 . The application device according to claim 1 , characterized in that the second line section comprises at least one valve, a non-return valve and/or a controllable valve for opening or closing the second line section.

11 . The application device according to claim 1 , characterized in that the second line section extends along the mixer, is arranged parallel to the first line section and/or is arranged coaxially to the first line section.

12 . The application device according to claim 11 , characterized in that the second line section extends in the application tube inside or outside the mixer.

13 . The application device according to claim 1 characterized in that the first line section and/or the second line section is openable or closable by a rotary closure and the application tube comprises the rotary closure.

14 . The application device according to claim 13 , characterized in that the application tube is formed multi-tubed.

15 . The application device according to claim 14 , characterized in that the application tube comprises at least two tubes between which the second line section runs and/or of which at least one tube is rotatable to open or close the first line section and/or the second line section and thus to form a rotary closure.

16 . The application device according to claim 15 , characterized in that the rotary closure is arranged in the outlet-sided end portion of the application tube.

17 . The application device according to claim 16 , characterized in that a valve needle running coaxially to the application tube is arranged in the application tube and the valve needle extends into the outlet-sided end section of the application tube.

18 . The application device according to claim 17 , characterized in that the first line section and the second line section are separated from each other in the application tube by a double wall.

19 . The application device according to claim 1 characterized in that the first line and/or the second line runs in the application head.

20 . The application device according to claim 1 characterized in that the second line section runs in the application head or is guided past the application head.

21 . The application device according to claim 1 characterized in that

the first line section leads into the application tube via a front side of the application tube, and

the second line section leads into the application tube via the front side of the application tube, leads into the application tube via a lateral surface of the application tube or leads into the application nozzle via a lateral surface of the application nozzle.

22 . The application device according to claim 1 characterized in that the first line section and the second line section lead into the application nozzle via a front side of the application nozzle.

23 . The application device according to claim 1 characterized in that

the first component material is an adhesive medium,

the first line is an adhesive medium line,

the second line section is an adhesive medium line section, and

the second component material is a hardener medium, wherein the second line is a hardener medium line, and

the application bead is an adhesive bead.

24 . The application device according to claim 1 characterized in that the first component material of the first line and the first component material of the second line section is the same material.

25 . The application device according to claim 1 characterized in that the mixer and/or the application tube comprises a mounting structure for detachable mounting to the application head.

26 . The application device according to claim 1 characterized in that the application device comprises a first hardening means for hardening application bead sections from the 2C material and/or a second hardening means for hardening application bead sections from the first component material.

27 . The application device according to claim 26 , characterized in that the first hardening means is configured for hardening by means of induction or by means of infrared radiation and/or the second hardening means comprises a hardening oven.

28 . An application device for alternately applying a 2C material, comprising:

an application head;

a first line section leading to an application nozzle, wherein the first line section comprises a mixer and a first line for a first component material and a second line for a second component material, wherein the first line and the second line are connected to the mixer and the mixer mixes the first component material and the second component material with each other for forming a 2C material;

a second line section for the first component material to form an application bead of alternately the 2C material from the first line section and the first component material from the second line section; and

wherein the second line section and the first line section runs through an application tube and are separated from each other in the application tube by a double wall; and

wherein the first line comprises a controllable valve for opening or closing the first line and the second line comprises a controllable valve for opening or closing the second line and the first valve and the second valve are integrated in the application head before the mixer.