Difference between MIM metal injection molding and PM press molding

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The powder metallurgy process has two major molding technologies, one is MIM injection molding, and the other is PM compression molding. Both molding technologies are one-time molding, near-net molding technology,which are suitable for small precision parts manufacturing and mass production is more conducive to cost savings And production efficiency, but MIM injection molding technology is more suitable for the production of high-precision, complex parts and for not particularly complex, special materials, then the use of PM press molding production is more suitable than traditional processing technology.

What is the difference between MIM injection molding and PM press molding?

1. MIM injection molding without restrictions

PM compression molding depends on high-pressure uniaxial compression molding, PM compression molding is more suitable for simpler structural parts. The use of MIM injection molding has almost no geometric restrictions, and the three-dimensional design is very free.

2. MIM injection molding is more cost-effective

If customers want to increase the cost of more expensive raw materials and equipment, you can save on high-density, high-complexity structural parts, which cannot be manufactured by any other traditional process. PM press molding may be a cost-effective solution for simple parts, but MIM injection molding can produce precise part geometries without cutting and secondary processing, reducing costs for the entire production.

3. Powder material

PM and MIM use the same basic powder. Both processes can customize special parts. However, the key difference in materials is the particle size. MIM injection molding powder is much smaller and more expensive than PM compression molding powder.

4. Better physical properties

The density of the structural parts produced by MIM injection molding and the structural parts produced by PM compression molding are not the same. The friction between the powder and the tool will make the parts uneven, while the MIM injection molded parts are uniform in all directions. The sintering temperature of MIM is much higher than that of PM, and the strength, toughness and wear resistance of MIM injection molding are significantly higher.

MIM Debinding Sintering Furnace