Method of making ceramic cores for use in casting

Details Method of making ceramic cores for use in casting Method of making ceramic cores for use in casting

1996-06-28

1997-12-16

Lin, Kuang Y.

Metal founding

Process

Shaping a forming surface

164520, 164529, B22C 910

Patent

active

056974183

ABSTRACT:
A method of making a ceramic core for use in a casting process comprises the steps of forming a core in a mould by hot injection of a thermoplastic paste consisting of a refractory ceramic composition and an organic fraction, eliminating the organic fraction from the core by heat treatment, heat treating the core to achieve the minimum consolidation necessary to enable the core to be handled, impregnating the porous structure of the core with a solution comprising a silica or alumina based elementary oxide colloid, and eliminating the liquid from the impregnated product.

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