Metal injection molding (MIM), as a near net forming technology for manufacturing high quality precision parts, has incomparable advantages over conventional powder metallurgy, machining and precision casting methods.

--The size shrinkage of raw material powders is usually 1-20 microns, ranging from injection embryo to sintered embryo, which can reach about 16%-20% depending on the material.

--Small metal parts with complex shapes (usually 0.1-200 g in size) can be produced as plastic injection molding.

--Each part of the workpiece has uniform structure and good density. The density can reach 95%-99% of the theoretical density. It can be carburized, quenched, tempered and other heat treatments. Some parts with high dimensional accuracy can also be processed by CNC machining.

--The dimension accuracy of the product can reach +/-0.1-0.5%. The surface is smooth and the one-time accuracy can reach Ra1.6.

--The product quality is stable and the production efficiency is high. In the case of mass and large-scale production, the cost can be greatly reduced.

--Basic principles of MIM product design: Select the shape and position of inlet and outlet, uniform wall thickness, avoid sharp corners, arc transition, design holes and grooves, design concave and sagging, design threads, consider reinforcing ribs and connecting walls, design knurling, printing, engraving trademarks, consider sintering support, pay attention to concave and weld marks, surface coating or coating, heat treatment, secondary processing. Etc.

--MIM parts usually do not need to be machined again unless there are special requirements. MIM technology has large advantages for materials like tungsten alloy and cemented carbide which are hard to process. MIM parts can also be hardened, such as nickel plating, hard chromium plating and other surface treatment processes can be used.