What are the key points to be mastered in the forming process of powder metallurgy products?

Powder metallurgy products, powder metallurgy, metal injection molding

Powder metallurgy products need to be used to the mold, then the products in the process of forming what should be the main point of it?

Metal injection molding powder metallurgy common forming method is in rigid closed mold metal powder compression molding, the mold cost is high; due to poor powder mobility, and by friction, compact density is generally low and uneven distribution, high strength, thin wall, elongated and along the pressing direction was changed for the section of the product is difficult to form. Therefore, the design of the structure of the parts used for pressing and forming should pay attention to the following problems.

1) free from the side walls of the groove and the concave hole, in order to facilitate the compaction or reduction of residual block.

2) avoid along the pressing direction for increasing the cross-sectional area, compaction. The junction of the wall should be rounded or chamfered transition, avoid sharp corners to compaction and prevent the stress concentration caused by mold or compacts.

3) the amount of simple, symmetrical shape, avoid cross section change is too large and narrow groove, spherical and so on, in order to facilitate the mold making and compaction,

4) free local thin for powder compaction and prevent the emergence of crack.