What is metal injection molding

What is metal injection molding

Metal injection molding (MIM for short) is a new type of powder metallurgy near-net forming technology derived from the plastic injection molding industry. As we all know, plastic injection molding technology produces various products with complex shapes at a low price, but the strength of plastic products is not high. In order to improve its performance, metal or ceramic powder can be added to the plastic to obtain products with higher strength and good wear resistance. In recent years, this idea has evolved to maximize the content of solid particles and completely remove the binder and densify the compact in the subsequent sintering process. This new powder metallurgy forming method is called metal injection molding.

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WinWay focuses on providing you with precision machining, precision tooling, etching lid, precision hardware, precision mechanical, metal injection, precision metal, CNC precision, Precision Plating, CNC parts, Optical Communication Parts and Precision Medical Parts, high-mix/small-volume and Low-mix/high-volume manufacturing services.

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The basic process steps of metal injection molding

The first is to select the metal powder and binder that meet the MIM requirements, and then use an appropriate method to mix the powder and binder into a uniform feed at a certain temperature. After granulation, the injection molding is performed, and the obtained compact is degreased After treatment, sintering and densification become the final product.

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Frequently Asked Question

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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)

Our updates and blog posts

What is metal injection molding|metal-injection

{keyword}.MIM technology originated in some European countries, and was first used in the development and application of military equipment components.

Metal injection molding (MIM) process characteristics|metal-injection

Metal injection molding process characteristics.{keyword}. High degree of freedom in the geometric shape of the parts.

Metal injection molding application field|metal-injection

{keyword}.The application of MIM is extremely wide.(1) Automobile parts: parts for airbags,(2) Military parts: gun parts, ammunition parts, fuze parts;

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