What is powder metallurgy technology ?

Powder metallurgy technology was first used in the United States in 1870. It used a metal powder as a raw material, and then pressed copper-lead alloy bearings to realize the self-lubricating technology of the bearing, and produced various parts and components through pressing and sintering. The powder metallurgy technology process sounds unfamiliar to everyone, but if after my explanation , it will be easy for you to understand.

The basic process of powder metallurgy technology
The main material is fine iron powder, then the powder is added to the required mold, and then the model is formed by (injection) or pressure, and finally the desired part and effect can be obtained by sintering. Some parts require post-processing.

What’s the difference of  MIM and PM powder metallurgy parts?
1: Powder metallurgy injection molding
Powder metallurgy injection molding was born in California in 1973, referred to as MIM. It is a new type of powder metallurgy molding technology invented by combining plastic injection molding technology with the field of powder metallurgy. The powder metallurgy injection molding process is relatively close to the powder metallurgy technology. First, the solid powder and the organic binder are uniformly mixed, and then heated and plasticized at a high temperature of 150 degrees. The injection molding equipment is used to inject the mold into the cavity, and then solidify and shape. The decomposition method removes the binder in the formed blank, and finally, like powder metallurgy, precision parts are produced through sintering.

2: Powder metallurgy pressing
Powder metallurgy compression molding is to fill the mold with powder by gravity, and extrude it by machine pressure. It is one of the most widely used in practical industrial applications. Cold-sealed steel mold pressing, cold isostatic pressing, hot isostatic pressing, and warm pressing are all press forming. However, because it can only be pressed up and down in both directions, some complex structural parts cannot be produced or can only be made into blanks.

Many parts use injection molding or compression molding, and the final part performance will be different. If you still can’t distinguish well, don’t hesitate to contact us Jingshi New Materials for consultation.