Method of burning out polycarbonate patterns from ceramic molds

Details Method of burning out polycarbonate patterns from ceramic molds Method of burning out polycarbonate patterns from ceramic molds

1992-02-12

1994-03-29

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264113, 264125, 264221, 264317, 264 60, B29C 6700, B29C 3340

Patent

active

052982041

ABSTRACT:
A method of making a fused polycarbonate pattern for casting alloy structures, particularly gas-turbine blades, or components. A plurality of powder layers are fused together by a laser beam in a layer-by-layer fashion to produce the pattern. A pattern/casting mold is made and the pattern is burned out in a flash flame oven at a temperature ranging from about 1600.degree. F. to about 2100.degree. F. Preferably the burn-out step is conducted in the presence of an air stream so that the polycarbonate pattern is burned out ash free.

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