Manufacture of parts from particulate material

Details Manufacture of parts from particulate material Manufacture of parts from particulate material

1991-12-10

1993-11-16

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Powder pretreatment

419 37, 419 38, 419 44, 264 63, 264 86, B22F 102, B22F 312

Patent

active

052621227

ABSTRACT:
The disclosure relates to a method of binder removal from a green body before sintering or the like wherein the green body is initially heated to a temperature above the melting or flow point of the binder to liquify the binder and, at the elevated temperature, a small portion of the green body is brought into intimate contact with a non-supporting porous body of lower capillarity potential for the liquid binder. The liquid is drawn from all parts of the green body to the region of contact between the porous body and the green body and enters the body of lower capillarity potential preferentially, removing liquid from the green body through the surface of the green body only at said region of contact. The draining is continued with or without further increase in temperature until the green body is opened or becomes permeable.

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