What is metal injection molding

MIM parts are often used as-sintered, but machining, heat treating, plating and other processes can be applied to the sintered part. Parts that distort during sintering can be coined or otherwise straightened afterward. In special applications where 100 percent density is required, a hot isostatic pressing (HIP) process is used. Debinding furnace.

Iron-based, low-alloy, high-speed steel, stainless steel, gram valve alloy, cemented carbide, etc. are all suitable for MIM forming.

The basic process of metal injection molding (MIM) is: First, the solid powder is uniformly mixed with the organic binder, and after granulation, it is injected into the mold cavity with an injection molding machine under heating and plasticizing state (~150℃) to solidify and shape. Then use chemical or thermal decomposition to remove the binder in the molding. Finally, the final product is obtained by sintering and densification.

Metal injection molding technology is very good for making some ‎precision, ‎complex, ‎small metal parts,

Generally suitable for the MIM process of metal parts are: 1. Complexity; 2. Precision (the reference design of MIM net molding accuracy is usually ± 0.5% of the size); 3. Weight and size (MIM is especially suitable for parts weighing less than 100 grams, and less than 50 grams is the most economical application); 4. Thinning (wall thickness less than 6 mm is the most suitable for MIM)