Metal powder injection molding technology in recent years, powder metallurgy science and industrial development in the rapid field, is a modern and advanced plastic injection molding technique and traditional powder metallurgy technology to combine a new powder metallurgy near net shaping technology. This technology not only has a conventional powder metallurgy technology of high production efficiency, good product consistency, less cutting or cutting, cost-effective advantages, and to overcome the traditional powder metallurgy products, low density, inhomogeneous materials, mechanical property is low, difficult forming thin wall complex faults, especially suitable for large batch, small, complex and with the special requirements of the metal parts production and processing.Since the technology in the nineteen eighties medium-term industrialization since, have make a spurt of progress of development, injection molding products have been all over the computer information industry, car and motorcycle industry, medical equipment, household appliances, instruments, machinery manufacturing, chemical, textile, defense industry and other fields. The process of the main features are as follows:1 may form complex structure parts of the process technology using injection molding product semifinished product, ensure material fully fill the mold cavity, also ensures that the parts of the complex structure of the realization. This is the traditional machining and conventional powder metallurgy technology is unable to compare, is the injection molding process to develop a strong foundation.2injection molding product size and high precision injection molding process can be directly formed thin-wall, complex structure, the product shape has been able to have reached or close to the final product requirements, the product does not have to be two times or less finishing processing. Dimensional tolerance of the parts is generally maintained at around 0.1%~0.3%.3powder compaction process compared with the traditional injection molding products, microstructure uniformity, high density, good performanceZhuzhou diamond material limited company MIM technology has been in the world leading level, can be mass production of single0.03-500g MIM products, forming cavity, a straight hole, such as internal and external thread highly complex workpiece, its dimension precision can be controlled in the range of 0.05%.