Ceramic slip casting technique

Details Ceramic slip casting technique Ceramic slip casting technique

1992-09-22

1993-11-30

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

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

264221, C04B 3328

Patent

active

052662527

ABSTRACT:
An improved process for slip casting ceramic articles that does not employ parting agents and affords the casting of complete, detailed, precision articles that do not possess parting lines. A wax pattern for a shell mold is provided, and an aqueous mixture of a calcium sulfate-bonded investment material is applied as a coating to the wax pattern. The coated wax pattern is then dried, followed by curing to vaporize the wax pattern and leave a shell mold of the calcium sulfate-bonded investment material. The shell mold is cooled to room temperature, and a ceramic slip is poured therein. After a ceramic shell of desired thickness has set up in the shell mold, excess ceramic slip is poured out. While still wet, the shell mold is peeled from the ceramic shell to expose any delicate or detailed parts, after which the ceramic shell is cured to provide a complete, detailed, precision ceramic article without parting lines.

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patent: 4338272 (1982-07-01), Pelton et al.
patent: 4556528 (1985-12-01), Gersch et al.
patent: 4659526 (1987-04-01), Shimaguichi et al.
patent: 4812278 (1989-03-01), Natori
patent: 5159970 (1992-11-01), Burkarth

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