METHOD FOR PRODUCING A SPECTACLE ARM

Abstract

A method produces a spectacle arm that has an arm body (1) made of plastics material and a metal support inlay (3), in which method the arm body (1) is manufactured additively with a receiving recess for the support inlay (3) and then the support inlay (3) is introduced into the receiving recess of the arm body (1). The arm body (1) is manufactured additively with a longitudinal groove (2) as the receiving recess, which extends at least along a portion of the arm body, and the longitudinal groove (2) with the introduced support inlay (3) is injected with plastics material.

Claims

1. A method for producing a spectacle arm that has an arm body of plastic and a metallic support inlay, said method comprising: forming the arm body additively with a receiving recess configured to receive the support inlay; and introducing the support inlay into the receiving recess of the arm body; wherein the forming of the arm body additively forms the receiving recess with a longitudinal groove that extends at least along a portion of the arm body; and wherein the longitudinal groove with the inserted support inlay is injected with plastic.

2. The method according to claim 1, wherein the method further comprises subjecting the additively formed arm body to surface treatment and/or providing the additively formed arm body with a coating before said introducing of the support inlay.

3. The method according to claim 1, wherein the method further comprises subjecting the additively formed arm body to surface treatment and/or providing the additively formed arm body with a coating after the injecting of the longitudinal groove with the support inlay with plastic.

4. A spectacle arm comprising: an arm body formed additively from plastic, said arm body having a receiving recess therein, and a metallic support inlay in the receiving recess of the arm body; the receiving recess being configured as a longitudinal groove extending at least along an arm body section; and wherein the longitudinal groove with the support inlay inserted therein has a plastic injection molding closing the longitudinal groove.

5. The spectacle arm according to claim 4, wherein the longitudinal groove has end faces with blind holes thereon, and ends of the support inlay engage in the blind holes on the end faces of the longitudinal groove.

6. The spectacle arm according to claim 4, wherein the longitudinal groove has clamping catches distributed over its a length thereof securing the inserted support inlay.

7. The spectacle arm according to claim 4, wherein the longitudinal groove forms an undercut.

8. The spectacle arm according to claim 5, wherein the longitudinal groove has clamping catches distributed over a length thereof securing the inserted support inlay.

9. The spectacle arm according to claim 5, wherein the longitudinal groove forms an undercut.

10. The spectacle arm according to claim 6, wherein the longitudinal groove forms an undercut.

11. The spectacle arm according to claim 8, wherein the longitudinal groove forms an undercut.

Description

BRIEF DESCRIPTION OF THE INVENTION

[0011] The method according to the invention is explained in more detail on the basis of the drawing, wherein:

[0012] FIG. 1 shows an arm body of a spectacle arm according to the invention in the region of the receiving recess for the support inlay in a view of the side with the longitudinal groove;

[0013] FIG. 2 shows the finished spectacle arm in a partially exposed view according to FIG. 2, and

[0014] FIG. 3 shows a section along line III-III of FIG. 1 on a larger scale.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] FIG. 1 shows the arm body 1, which is additively manufactured from plastic, with the receiving recess in the form of a longitudinal groove 2 for a support inlay 3. This longitudinal groove 2 has an undercut 4, as can be seen in particular in FIG. 3. Blind holes 5 are provided at the end faces of the longitudinal groove 2, in which the ends 6 of the support inlay 3 engage in order to hold the support inlay 3 within the longitudinal groove 2. In addition, clamping catches 7 are provided along the longitudinal groove 2 to serve the same purpose.

[0016] Since, in contrast to production by injection molding, demoldability does not have to be taken into account in additive manufacturing of the arm body 1, comparatively simple manufacturing conditions are obtained with regard to the production of the arm body 1 with the longitudinal groove 2, which is nevertheless of complex design due to the undercut 4 and the blind holes 5 on the end face.

[0017] In order to connect the support inlay 3, which is inserted into the longitudinal groove 2 as shown in FIG. 1, to the arm body 1 in a form-fitting manner, the longitudinal groove 2 with the support inlay 3 is injected with plastic. The injection mold required for this is simple, because all that is needed is for the inserted arm body to fit tightly against the mold along the longitudinal groove. After demolding, the plastic injection molding 8 completely covers the longitudinal groove 2 as shown in FIGS. 2 and 3 and ensures a connection between the arm body 1 and the support inlay 3 that meets all requirements.