Metal injection molding can be traced back to the powder injection molding preparation of ceramic spark plugs that began in the 1920s. In the following decades, powder injection molding mainly focused on ceramic injection molding. It was not until 1979 that the metal injection molding product of Parmatech, which was formed by Wiech and others, won two awards, and at that time Wiech and Rivers obtained patents, and powder injection molding began to turn to metal injection molding.
In the past, due to lack of suitable powders and high raw material prices, imperfect knowledge platform, immature technology, short time for people to understand and market acceptance, production (including mold manufacturing) cycle The development and application are relatively slow due to reasons such as too long and insufficient investment.
In order to solve the difficulties of MIM technology and promote the practical application of MIM technology, the United States formulated an advanced powder engineering plan in the mid-1980s. The research content included 18 related to injection molding. Subject. Subsequently, Japan, Germany, etc. 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 Omark Industries, Remington Military Products, Rocky Dental, etc. Subsidiary. In 1986, Japan's Nippon Seison company introduced the Wiech process. In 1990, Israel Metalor2000 company introduced Wiech process technology from Parmatech company and established a MIM production line.
With the continuous deepening of MIM research, the development of new binders, the continuous progress of powder milling technology and degreasing technology, industrialization has been achieved in the early 1990s. After more than 20 years of hard work, currently MIM has become a rapidly developing and most promising new near-net forming technology in the international powder metallurgy field, and is known as one of the "most popular metal parts forming technologies in the world".