Ceramic core for use in making molds and dies

Details Ceramic core for use in making molds and dies Ceramic core for use in making molds and dies

1977-04-28

1979-02-13

Hayes, Lorenzo B.

Compositions: coating or plastic

Coating or plastic compositions

Molds and mold coating compositions

106 389, 106 65, 106 69, B28B 734

Patent

active

041393937

ABSTRACT:
Compacted articles, such as molds and dies, may be produced by compacting an alloy particle charge of a composition from which it is desired to make the mold and die against a ceramic core having a configuration corresponding generally to the desired configuration of the article; the ceramic core of the invention is constructed from an admixture comprising rounded refractory oxide particles and a colloidal silica as a binding agent; preferably the rounded refractory oxide particles are zircon sand. Cores in accordance with the invention are readily cast into precision shapes required for mold and die manufacture and also are easily removable from the compacted alloy such as molds or dies to expose the mold or die cavity.

REFERENCES:
patent: 3445250 (1969-05-01), Preece
patent: 3512571 (1970-05-01), Phelps
patent: 3537949 (1970-11-01), Brown et al.
patent: 3656983 (1972-04-01), Sulinski

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