Method for producing articles from particulate materials using a

Details Method for producing articles from particulate materials using a Method for producing articles from particulate materials using a

1992-08-26

1994-07-26

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Powder pretreatment

525 51, B22F 100

Patent

active

053325435

ABSTRACT:
The disclosure relates to a binder, and the method of formulating the said binder, which is suitable for shaping parts from metallic and/or ceramic particles by injection molding. The binder comprises materials that are mainly thermoplastics, each of which having a percentage that is determined by its thermogravimetric analysis (TGA) profile and a weight loss versus temperature profile that is designed for the binder to allow highest binder removal rate from a green body by progressive heating. The removal of this binder from the green body is performed within a much shorter period of time than those published in the prior art. An example binder comprises 40-70% HDPE, 18-30% Paraffin wax, 10-25% microcrystalline wax and 2-5% stearic acid. Another binder comprises 35-65% PP, 23-35% paraffin wax, 10-25% microcrystaline wax and 2-5% stearic acid.

REFERENCES:
patent: 4874030 (1989-10-01), Kuphal et al.

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