Method of making an apertured casting

Details Method of making an apertured casting Method of making an apertured casting

1974-02-27

1976-05-18

Husar, Francis S.

Metal founding

Process

Shaping liquid metal against a forming surface

B22D 2900

Patent

active

039571041

ABSTRACT:
An apertured casting is made by first forming a duplicate in the shape of the finished casting, positioning refractory metal bodies such as wires in the duplicate at points corresponding to apertures or passageways in finished products, forming a ceramic coating on the duplicate, removing the duplicate material, firing the ceramic in a vacuum or inert atmosphere, vacuum casting the metal in the ceramic form, removing the ceramic form, heating the cast object in an atmospheric furnace to oxidize the refractory metal bodies and then leaching the oxidized refractory bodies from the casting with a molten caustic agent or acid solution.

REFERENCES:
patent: 2362875 (1944-11-01), Zahn
patent: 2679669 (1954-06-01), Kempe
patent: 2687278 (1954-08-01), Smith et al.
patent: 3401738 (1968-09-01), Parille
patent: 3422880 (1969-01-01), Brown et al.
patent: 3596703 (1971-08-01), Bishop et al.

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