Method of making mold used in pressure slip casting

Details Method of making mold used in pressure slip casting Method of making mold used in pressure slip casting

1987-08-05

1989-05-16

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

With printing or coating of workpiece

Coating or impregnating workpiece before molding or shaping...

264 86, 264225, 264278, 264299, 264313, 264250, 425 3, 425DIG33, 249141, B29C 3912

Patent

active

048308021

ABSTRACT:
A method of making a porous mold used in pressure casting for forming ceramic articles, which includes the steps of: removably attaching a plurality of apertured holding members in an array at a desired interval to the inner face of an upper case made of a rigid material; threading a flexible line into the apertures of the holding members in each row to hold it at a predetermined spacing from the inner face of the upper case, at least one of the two ends of the flexible line being extended to the outside of the upper case; casting slurry into a mold cavity which is defined between the upper case and a lower basic case joined to the former case to form a porous mold; removing the upper case from the porous mold after the slurry has cured, while leaving the holding members together with the flexible lines in the porous mold; and extracting the flexible lines from the porous mold to form channels in the porous mold.

REFERENCES:
patent: 1525797 (1925-02-01), Blum
patent: 2964821 (1960-12-01), Meehan
patent: 2979801 (1961-04-01), Gasmire
patent: 3243860 (1966-04-01), Whittaker et al.
patent: 3286974 (1966-11-01), Dean
patent: 3723584 (1973-03-01), Nussbaum
patent: 4191722 (1940-03-01), Gould
patent: 4413966 (1983-11-01), Mills et al.
patent: 4673542 (1987-06-01), Wigner

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