METAL INJECTION MOLDING
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What is MIM technology ？
Metal injection molding (MIM) is a metal parts processing technology that uses metal powder mixed with binder materials as raw materials, and then injects the mixture into precision molds to form complex metal parts. MIM technology is an innovative process that combines the versatility of plastic injection molding with the durability of metal materials. MIM technology is particularly suitable for manufacturing parts that require tight dimensional tolerances and surface finish.
MIM technology process flow
There are many steps in MIM process technology, the main steps are:
1. Mixing
Evenly mix the fine metal powder with the binder to make it an injectable raw material with good flow properties
2.Molding
Using an advanced MIM injection machine, the mixed raw materials are injected into the mold cavity with the shape of the part by applying pressure to form a blank (green embryo). The process steps are similar to plastic injection molding
3.Degreasing
The binder is removed from the green body through chemical solvent dissolution, thermal decomposition, etc.
4.Sintering
The blank is heated in a specific atmosphere, usually kept at a temperature lower than the melting point of the basic components, so that the strength and density of the sintered body are increased, and it becomes a product with good physical and mechanical properties
5.Post-processing
Finally, follow-up processing is performed according to product needs, such as heat treatment, surface treatment, etc.
Features and advantages of MIM products
Able to realize product features of small size, complex shape, and high precision at the same time
Powder metallurgy products have greater flexibility in material use and alloy selection. They can use either single materials or mixed materials.
The product manufacturing efficiency is high, and the product blank can be obtained in one molding, usually without the need for additional mechanical processing.
More environmentally friendly and energy-saving. MIM processing has almost no loss of metal materials, which is very important for some precious metals, and the energy consumption during processing is lower. Therefore, MIM processing is suitable for scenarios that require mass production, complex structures, small sizes, and high-value raw materials. Unparalleled advantages.