MIM is short for MetalInjection molding (METAL powder injection molding). Metal powder injection molding (MPE) is the product of plastic molding technology, polymer chemistry, powder metallurgy technology and metal material science. There is a practical explanation for the MIM: metal parts are designed to look like plastic injection parts; Using the advantages of plastic injection rapid replication, the metal parts are injected into forming, and then made into metal solid parts through the hot process.

Although MIM is made of metal powder, it is inseparable from plastic. Injection molding granules are composed of metal powder and plastic, and plastic is mainly used for bonding and lubrication. Through the coating effect of plastic, the wear of metal powder on screw is greatly reduced, and the fluidity of injection melt is increased, which makes the injection of metal possible.