Powder Injection Moulding

Powder Injection Moulding

Powder Injection Moulding (PIM) uses the shaping advantage of injection moulding but is applicable to metals and ceramics. PIM delivers structural materials in a shaping technology usually restricted to polymers.

Arburg - MIM

Principle

PIM combines a small quantity of a polymer with an inorganic powder to form a feedstock that can be moulded ("green" part). After shaping, the polymeric binder is extracted and the powder is sintered, often to the near-theoretical densities (sintered part).

green-sintered

 

 

This picture shows a "green" part (just after moulding) and its associated sintered part (stainless steel).

 

 

 

µ-PIM combines the higher properties of metals or ceramics (strength, stiffness, hardness, conductivity for metals, …) with high productivity of injection moulding process (net-shape, complex structures, short cycle times, material saving …). Its success versus other shaping technologies lies in the combined attributes. It overcomes the property limitations inherent to plastics, the shape limitations in traditional powder compaction, the costs and productivity limits of machining, and the defect and tolerance limitations of casting.