The purpose of metal injection molding

The purpose of metal injection molding

The intention of metal injection molding is to obtain the desired shape of the MIM green body with no defects and uniform arrangement of particles. Firstly, the granular feed is heated to a certain high temperature to make it flow, and then it is injected into the mold cavity to cool down to obtain the required shape of a rigid body, and then it is taken out of the mold to obtain the MIM forming blank.

This process is the same as the traditional plastic injection molding process, but because of the high powder content of MIM feed, its injection molding process is very different in process parameters and other aspects, and it is easy to have various shortcomings if it is not properly controlled.

Since the occurrence of MIM technology, with the different binder systems, a variety of MIM process routes and degreasing methods have been formed. The degreasing time has been shortened from the first few days to a few hours. In terms of degreasing steps, all degreasing methods can be roughly divided into two categories: one is two-step degreasing method. The two-step degreasing method includes solvent degreasing+thermal degreasing, siphon degreasing - thermal degreasing, etc. The one-step degreasing method is mainly the one-step thermal degreasing method, and the advanced one is the amaetamold method. Below are several representative MIM degreasing methods.