etal injection molding (mim) can be traced back to the ceramic spark plug powder injection in the 1920s. In the following decades, powder injection mainly focused on ceramic mim.

It was not until 1979, when Parmatech, founded by Wiech and others, won two awards for its metal injection molding products, and Wiech and Rivers were granted patents, that powder injection molding began to be dominated by metal injection molding.

In the past, due to the lack of suitable powder and raw material price is too high, knowledge platform is not perfect, technology is not mature, people understand and market acceptance time is not long, production (including mold manufacturing) cycle is too long, investment is not enough, MIM technology  development and application is relatively slow. 

In order to solve the difficulties of MIM technology and promote the practical application of MIM technology, an advanced powder engineering program was developed in the United States in the mid-1980s, covering 18 subjects related to injection molding.Subsequently, Japan and Germany also actively carried out the development and research of MIM.

Wiech established Witec in 1980, Brunswick entered the MIM industry in 1982 and acquired Witec, and then gradually registered subsidiaries such as Omark industry, Remington military products and Rocky dentistry.Wiech technology was introduced by Japanese company Nippon Seison in 1986.In 1990, metalor2000 Israel introduced Wiech technology from Parmatech and set up MIM production line.