Precision casting process

Details Precision casting process Precision casting process

1975-05-12

1977-07-05

Shore, Ronald J.

Metal founding

Process

Shaping liquid metal against a forming surface

164122, 164127, 164361, 249111, B22D 2704

Patent

active

040334015

ABSTRACT:
The mold is preheated to a temperature above the maximum local casting temperature prior to casting of the melt and is also cooled to obtain a variation of temperatures throughout the mold. The resulting temperature gradient of the mold is intended to maintain the heat content per unit volume in the unsolidified melt portions greater than in the adjacent solidified melt portions to compensate for the latent heat of solidification in the melt and thus avoid shrinkholes and blowholes.

REFERENCES:
patent: 2420003 (1947-05-01), Miller
patent: 3200455 (1965-08-01), Operhall et al.
patent: 3274652 (1966-02-01), Banks
patent: 3346039 (1967-10-01), Lyons
patent: 3376915 (1968-04-01), Chandley
patent: 3414042 (1968-12-01), Behrens et al.
patent: 3472308 (1969-10-01), Louth
patent: 3552479 (1971-01-01), Hockin
patent: 3680625 (1972-08-01), Hein et al.

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