Investment casting method

Details Investment casting method Investment casting method

1974-11-06

1976-12-14

Shore, Ronald J.

Metal founding

Process

Shaping a forming surface

164131, 164349, B22C 0904

Patent

active

039969916

ABSTRACT:
An investment casting method for making a desired casting of a relatively large size by the use of a mold of one-piece construction within close dimensions, which comprises preparing a thermally fusible pattern which is a replica of the desired casting, forming a refractory investment enveloping the thermally fusible pattern, melting the thermally fusible pattern out of the investment leaving a cavity in the refractory investment, and heating the investment to provide a rigid ceramic mold of one-piece construction. Melting of the thermally fusible pattern out of the investment is carried out in contact with a vaporized organic solvent without causing the thermally fusible pattern to thermally expand which may otherwise result in formation of cracks in the refractory, investment, that is, mold.

REFERENCES:
patent: 3351123 (1967-11-01), Payne
patent: 3639507 (1972-02-01), Uram

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