Cavityless casting mold

Details Cavityless casting mold Cavityless casting mold

1977-03-01

1978-01-17

Husar, Francis S.

Metal founding

Means to shape a forming surface

Including means applying vacuum directly to mold material

164 34, 164171, 425405H, B22C 1522, B22C 922

Patent

active

040687040

ABSTRACT:
A casting mold filled with free-flowing particulate matter such as sand, in which there is imbedded a vaporizable pattern of foam plastic conforming to the shape of the desired casting, has at least two of its walls formed by flexible membranes exposed to the atmosphere for creating a more or less isobaric pressure upon the application of suction to its interior. One membrane may span the open top of a four-sided rigid shell whose perforated bottom is overlain by another such membrane; alternatively, with the sidewalls of the shell also perforated and/or vertically ribbed or fluted, five membranes may be combined into an open-topped bag lining the interior of the shell, the top of the bag being closed by a sixth membrane after introduction of the sand filling and its pattern.

REFERENCES:
patent: 3410942 (1968-11-01), Bayer
patent: 3572421 (1971-03-01), Mezey

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