Plastic and nonmetallic article shaping or treating: processes – With step of making mold or mold shaping – per se – Utilizing surface to be reproduced as an impression pattern
Patent
1991-06-17
1993-05-25
Chiesa, Richard L.
Plastic and nonmetallic article shaping or treating: processes
With step of making mold or mold shaping, per se
Utilizing surface to be reproduced as an impression pattern
264222, 264317, B29C 3376
Patent
active
052137465
ABSTRACT:
A process for obtaining precision castings of body parts wherein the body part is first immersed in a ice and water slush, immediately removed therefrom and immersed in a melted paraffin wax-water container, immediately removed therefrom and the body part extracted from the resulting wax mold. At least the interior surface of the hollow wax mold is coated with a casting material and permitted to cure at room temperature. The cured casting is heated by immersion in the wax-water container or in a separate heated water container for a period of at least ten minutes to remove the wax mold and recover a casting of the body part. The removed wax molding material may be recycled and employed in subsequent castings and recover a casting of the body part.
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Chiesa Richard L.
Davis Robert B.
Nelson Wallace J.
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