Method for forming adjuster brush frame

Abstract

The invention relates to a method for forming an adjuster brush frame, which comprises the following steps of blanking by utilizing a blanking mould pair to obtain a metallic adjuster brush-frame framework; placing the adjuster brush-frame framework into a punching mould for punching the adjuster brush-frame framework to form a hole at a required position; bending the punched adjuster brush-frame framework into a preset shape; carrying out preliminary injection molding on the adjuster brush-frame framework to form an inner injection-molding layer which is connected with the adjuster brush-frame framework; cutting off the preset positions of the adjuster brush-frame framework and the inner injection-molding layer; carrying out secondary injection molding on the cutoff adjuster brush-frame framework and the cutoff inner injection-molding layer to form an adjuster brush-frame body; and welding electrical elements, such as a lead, a thermal fuse, a conducting piece and the like on the adjuster brush-frame body to form the adjuster brush frame. According to the method for forming the adjuster brush frame, the secondary injection molding is then carried out after the adjuster brush-frame framework and the inner injection-molding layer are firstly cut off by a two-time injection-molding method, so that the occurrence of metal-exposing situations can be greatly reduced.

Description

technical field [0001] The invention relates to the field of injection molding, in particular to a method for forming a regulator brush holder. Background technique [0002] The regulator brush holder is an important part in the generator regulator and is used to install the brushes. Since the strong impact force generated by the injection molding of the regulator brush holder is likely to cause deformation of the metal connecting piece on the regulator brush holder, people generally design injection molded ejector pin holes and punching holes for the metal connecting piece on the regulator brush holder. etc., to securely position the metal connection piece. In the prior art, when manufacturing the regulator brush holder, injection molding is performed first, and then a specific position is punched to form the regulator brush holder. However, due to the existence of injection molded thimble holes and punching holes, the formed regulator brush holder is prone to metal expos...

AI Technical Summary

Problems solved by technology

However, due to the existence of injection molding thimble holes and punching holes, the formed regulator brush holder is prone to metal exposure from these holes after punching, resulting in easy circuit short circuit and burning out of the generator

Therefore, how to design a new molding method so as to avoid the bare metal of the regulator brush holder has become a technical problem to be solved urgently by those skilled in the art