Mold assembly and method of making the same

Details Mold assembly and method of making the same Mold assembly and method of making the same

1976-01-29

1978-01-03

Shore, Ronald J.

Metal founding

Process

Shaping a forming surface

164 23, 164 34, 164137, 164349, 164DIG15, B22C 904, B22C 922

Patent

active

040661164

ABSTRACT:
A segmented mold assembly is utilized to cast a turbine engine component having an annular inner wall and an annular outer wall which are interconnected by a plurality of struts or vanes. The mold assembly includes a plurality of sections which are formed of a ceramic mold material and are interconnected at flange joints. A pair of mold sections are advantageously formed simultaneously by repetitively dipping a single pattern in a slurry of liquid ceramic mold material to form a wet coating on the pattern. This wet coating of ceramic mold material is then dried. After a covering of the desired thickness has been built up by repetitively dipping and drying the coatings on the wax pattern, the wax pattern is destroyed. To facilitate separating the mold sections after destroying the wax pattern, at least some of the wet coatings are wiped away in an area between portions of the wet coatings which will eventually form the mold sections.

REFERENCES:
patent: 2848774 (1958-08-01), Petty
patent: 2871528 (1959-02-01), Schilling
patent: 3669177 (1972-06-01), Ingolls et al.
patent: 3840971 (1974-10-01), McDonald
patent: 3848654 (1974-11-01), Boyle et al.

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