Molding apparatus with shielding mold member

Details Molding apparatus with shielding mold member Molding apparatus with shielding mold member

1973-03-13

1976-07-13

Baldwin, Robert D.

Metal founding

Means to shape a forming surface

Including means applying vacuum directly to mold material

164364, 164374, B22C 902

Patent

active

039688291

ABSTRACT:
A molding method comprising steps of bringing a shielding mold member into contact with the shaping surface of a shaping mold member to provide a mold assembly, filling a charge of a heat resisting particulate material in space disposed opposite the shaping mold member with respect to the shielding mold member, rendering negative the internal pressure of the space containing the charge so as to draw the shielding mold member toward the charge and cause the same to adhere thereto, removing the shaping mold member from the mold assembly so as to form a cavity defined by the shielding mold member, and pouring a molten metal into said cavity.

REFERENCES:
patent: 2513785 (1946-04-01), Browne
patent: 2757426 (1956-08-01), Brennan
patent: 3446265 (1969-05-01), Buck
patent: 3528481 (1970-09-01), Lund

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