Method of powder injection molding

Details Method of powder injection molding Method of powder injection molding

1997-03-10

1999-09-07

Jenkins, Daniel J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making composite or hollow article

419 36, 419 37, 419 38, B22F 102, B22F 312

Patent

active

059500638

ABSTRACT:
Provided is a powder and binder system for manufacturing sintered parts from particulate material, and a method of injection molding parts for sintering. The particulate material includes ceramic, metallic and intermetallic powders. Preferably, selected powder particles are coated with one or more additives depending on their shape and surface chemistry to create a powder system. The additives may include antioxidants, coupling agents, surfactants, elasticizing agents, dispersants, plasticizer/compatibilizers and lubricants. The surface active additives are designed to improve the interface between the powder and the binder. The powder system may be mixed or compounded with a binder system in an inert atmosphere to form a powder and binder system, or feedstock, for powder molding. The binder system, may contain one or more components which are removed prior to the sintering the powder. The powder and binder system may also be molded about an expendable core which is extracted prior to sintering.

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