Metal injection molding process(MIM) can directly forming high precision, complex structure mini spare parts, and the applicable scope of materials is extensive.Since the 1970s, it get rapidly development in all kinds of industries.
Metal powder injection molding(MIM) earlier application in the ordnance in China,mainly includes firearms, artillery shells and other parts.The shape and structure of gun have a bit complex, due to special application environment and has a certain risk, it determined the gun parts must have high quality, including mechanical properties, density, precision, etc.
Traditional gun parts generally used as raw material production by machining,it can get high quality gun parts use machining, but the utilization of machining material is low, especially in the production of gun structure parts, metal shell, etc., the utilization rate of material only from 15% to 20%, most of the materials have been cut off.And for mini parts of guns (machine, CARDS, etc.), high strength material (carbon steel, etc.) difficulty production , the efficiency is low and have no economy.
Now, the rifle in the ordnance,except the gun body and other large parts, most of the rest of the metal parts is made by metal injection molding. In pistol, charging, trigger, also use the injection molding parts.Metal injection molding for wide range of materials, can manufacture all kinds of metal materials of gun parts, meet the more material demands of people to gun application
In addition, this process parts have good consistency and high density, less machining characteristics etc.Most of the parts don't need to be machined can reach the precision requests, thus it make the metal powder injection parts occupies a considerable proportion in their parts.