Casting method and apparatus

Details Casting method and apparatus Casting method and apparatus

1977-05-18

1979-02-13

Lazarus, Richard B.

Metal founding

Process

Shaping a forming surface

164 37, 164195, B22C 904, B22C 1528

Patent

active

041390458

ABSTRACT:
A casting method and apparatus according to which a molten material is poured into a space occupied by a foam-plastic pattern which is at least partially embedded in a granular material. The foam-plastic pattern when contacted by the molten material decomposes and disappears, while a gas is generated from the contact between the molten material and the foam-plastic pattern. From this generated gas, by way of a suitable structure situated in a mold together with the pattern and granular material, an elevated pressure is created, and the molten material fills the space initially occupied by the foam-plastic pattern in the presence of this elevated pressure which is greater than atmospheric pressure.

REFERENCES:
patent: 3572421 (1971-03-01), Mezey et al.
patent: 3861447 (1975-01-01), Hondo

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