How to choose the forming process of powder metallurgy parts?

Dec 27, 2022

We know that there are basically two kinds of molding processes for powder metallurgy parts: injection molding and compression molding. In general, how do we choose the forming process of powder metallurgy parts. In fact, it is very simple. Here is a brief introduction of the following:

Powder metallurgy parts

In metal injection molding, firstly, the solid powder and organic binder are uniformly mixed. After granulation, the solid powder is injected into the mold cavity with an injection molding machine under the heating and plasticizing state (~150 ℃) for solidification and forming. Then, the binder in the preform is removed by chemical or thermal decomposition methods. Finally, the final product is obtained by sintering and densification. In general, metal injection molding uses very fine powder and a large amount of thermoplastic binder to inject into the molding mold.

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Powder compaction, also known as powder molding, is the earliest forming method used in powder metallurgy production. At the end of the 18th century and the beginning of the 19th century, Russia and Britain used steel molds to press platinum products. Subsequently, the powder compaction forming method was gradually improved, which was used to press the compacts of various oil-bearing, powder metallurgy antifriction products, powder) Taiwan metal machinery structural parts, etc. Since the 1930s, powder compaction has made greater progress, and the design of presses and dies has been continuously improved. It can press parts with complex shapes, with higher mechanization and automation. In the actual application process, press forming is widely used, such as our cold closed steel mold pressing, cold isostatic pressing, hot isostatic pressing and warm pressing.

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How to choose the molding process of powder metallurgy parts? No matter what method is selected to make P/M parts, it is important to select a professional reputable manufacturer