Casting process

Details Casting process Casting process

1987-08-05

1989-05-23

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Removal of liquid component or carrier through porous mold...

By direct application of vacuum or pneumatic pressure

425 85, B28B 126, B28B 2108, B28B 2136

Patent

active

048328901

ABSTRACT:
A process for casting slip into a ceramic product using at least one unique casting mold. The casting mold is formed of a plurality of separate porous mold parts, each of which has a fluid-tight outer face, an inner molding surface and a plurality of channels therein. The mold parts are combined so that the inner molding surfaces define a molding cavity in the mold. The casting mold is positioned within a pressure container such that a space is established surrounding the casting mold within the pressure container. This space is in fluid communication with the molding cavity of the mold. The casting process further includes the steps of: sealing the pressure container; firmly clamping the casting mold; feeding slip under a first pressure into the molding cavity until the molding cavity is filled with slip; supplying a fluid under a second pressure higher than the first pressure into the space surrounding the casting mold thereby applying the second pressure to the slip in the molding cavity and to the inner molding surfaces of the mold parts to form a cast layer of a predetermined thickness within the molding cavity; depressurizing the channels to drain water accumulated therein; discharging residual slip from the molding cavity; and removing the casting mold from the pressure container.

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patent: 4528152 (1985-07-01), Aoyama et al.
patent: 4591472 (1986-05-01), Gerster

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