Device for applying a viscous material

Abstract

The invention relates to a device (10) for applying a viscous material to a workpiece, in particular for applying an adhesive or sealing material to a motor vehicle body component, comprising: an application nozzle (14) with a material outlet opening (20); and a nozzle support (16) that supports the application nozzle (14), on which nozzle support the application nozzle (14) is releasably attached, wherein an application channel (18) extends through the nozzle support (16) and the application nozzle (14) up to the material outlet opening (20). According to the invention, the nozzle support (16) and the application nozzle (14) each have a connection part (22, 24), wherein a first connection part (22) is inserted into a second connection part (24) and is encircled thereby, and the connection parts (22, 24) can be moved relative to each other in a limited extent from a starting position against the restoring force of an elastic restoring element (38).

Claims

1. An apparatus for application of a viscous material onto a workpiece with an application nozzle having a material outlet opening and with a nozzle carrier, which carries the application nozzle and on which the application nozzle is fastened detachably, wherein an application duct extends through the nozzle carrier and the application nozzle up to the material outlet opening, wherein the nozzle carrier and the application nozzle respectively have a first connecting part and a second connecting part, wherein the first connecting part is inserted into the second connecting part and is annularly surrounded by the second connecting part, and the first and second connecting parts are limitedly movable relative to one another out of a basic position against a restoring force of an elastic restoring element, and wherein the first and second connecting parts are fastened detachably to one another by means of at least two connecting pins, wherein each of the two connecting pins passes through both the first and second connecting parts at least partly and, transverse to its longitudinal extent, is disposed immovably in one of the first and second connecting parts and in a limitedly movable manner in another of the first and second connecting parts.

2. The apparatus according to claim 1, wherein the first connecting part has a cylindrical outer contour, wherein the second connecting part has a cylindrical inner contour and wherein the outside diameter of the first connecting part is smaller than the inside diameter of the second connecting part.

3. The apparatus according to claim 1, wherein the restoring element is an elastic O-ring disposed between the first and second connecting parts.

4. The apparatus according to claim 1, wherein the connecting pins, respectively transverse to their longitudinal extent, are immovable relative to the second connecting part and limitedly movable relative to the first connecting part.

5. The apparatus according to claim 1, wherein the connecting pins are disposed pairwise in a manner parallel to one another.

6. The apparatus according to claim 1, wherein the connecting pins respectively extend through a hole in the second connecting part and a recess in the first connecting part that is open toward the side of the shell surface in the first connecting part.

7. The apparatus according to claim 1, wherein the nozzle carrier is provided with the first connecting part and wherein the application nozzle is provided with the second connecting part.

Description

(1) The invention will be explained in more detail in the following on the basis of an exemplary embodiment illustrated schematically in the drawing, wherein

(2) FIG. 1 shows an exploded diagram of an application apparatus and

(3) FIG. 2 shows the application apparatus according to FIG. 1 in assembled form in section.

(4) The application apparatus 10 illustrated in the drawing is used for the application of viscous material such as adhesive or sealing compound onto workpieces, for example onto body structural parts in the fabrication of motor vehicles. It is mounted on a robot arm 12, which is illustrated schematically in the drawing and with the help of which it can be moved relative to the workpiece. The application apparatus 10 has an application nozzle 14, which is mounted detachably on a nozzle carrier 16. An application duct 18 for the viscous material extends through the nozzle carrier 16 and the application nozzle 14 up to a material outlet opening 20 at the free end of the application nozzle 14. The viscous material is introduced into the application duct 18 and conveyed in a manner forced under pressure to the material outlet opening 20, where it emerges and is applied onto the respective workpiece.

(5) For fastening of the application nozzle 14 on the nozzle carrier 16, the nozzle carrier 16 has a first connecting part 22, which has a cylindrical outer contour. In contrast, the application nozzle 14 has, at its end turned toward the nozzle carrier 16, a second connecting part 24, which has a cylindrical inner contour and in which the first connecting part 22 is received, wherein the second connecting part 24 annularly surrounds the first connecting part 22. The said outside diameter of the first connecting part 22 is smaller than the inside diameter of the second connecting part 24, so that sufficient clearance is present between the two connecting parts 22, 24 that the application nozzle 14 may be tilted in limited manner relative to the nozzle carrier 16. Two holes 26a, 26b running parallel to one another and respectively communicating with a recess 28a, 28b open toward the side in the shell surface 30 of the first connecting part 22 extend through the second connecting part 24. A connecting pin 32a, 32b, the circular cross section of which corresponds to the cross section of the associated hole 26a, 26b, is inserted into each of the holes. Of those, a first connecting pin 32a has a larger diameter than a second connecting pin 32b. The two connecting pins 32a, 32b are joined to one another in one piece by means of a connecting element 34. Each of the recesses 28a, 28b has, transverse to the longitudinal extent of the connecting pins 32a, 32b, a width that is larger than the diameter of the associated hole 26a, 26b. In this way, the connecting pins 32a, 32b can be tilted in limited manner relative to the nozzle carrier 16, from which tilting of the application nozzle 14 joined immovably with them also results transverse to the longitudinal extent of the connecting pins 32a, 32b. An elastically deformable O-ring 38, which generates a restoring force opposing a tilting of the application nozzle 14 relative to the nozzle carrier 16 out of the basic position shown in FIG. 2 and in addition seals the connecting parts 22, 24 relative to one another, is disposed between the connecting parts 22, 24, in a manner resting on an end face 36 of the first connecting part 22. The connection between the application nozzle 14 and the nozzle carrier 16 is easy to loosen for removal of the application nozzle 14, in that the connecting pins 32a, 32b are grasped on the connecting element 34 and pulled out.

(6) In summary, the following may be stated: The invention relates to an apparatus 10 for application of a viscous material onto a workpiece, especially for application of an adhesive or sealing compound onto a motor-vehicle body structural part, with an application nozzle 14 having a material outlet opening 20 and with a nozzle carrier 16, which carries the application nozzle 14 and on which the application nozzle 14 is fastened detachably, wherein an application duct 18 extends through the nozzle carrier 16 and the application nozzle 14 up to the material outlet opening 20. According to the invention, it is provided that the nozzle carrier 16 and the application nozzle 14 respectively have a connecting part 22, 24, wherein a first connecting part 22 is inserted into a second connecting part 24 and is annularly surrounded by this, and that the connecting parts 22, 24 are limitedly movable relative to one another out of a basic position against the restoring force of an elastic restoring element 38.