Plastic and nonmetallic article shaping or treating: processes – Treatment of material by vibrating – jarring – or agitating... – By reciprocating or vibrating mold
Patent
1991-01-11
1993-05-25
Aftergut, Karen
Plastic and nonmetallic article shaping or treating: processes
Treatment of material by vibrating, jarring, or agitating...
By reciprocating or vibrating mold
264219, 264225, 264226, 264256, 2642971, 264313, 264333, 264337, B28B 108, B28B 116
Patent
active
052137325
ABSTRACT:
A process for preparing cast articles includes preparing a primary mold of a flexible resilient bag-shaped membrane, disposing casting material in a flowable state into the primary mold and allowing the casting material to harden. Optionally, a relatively fixed secondary mold or a combination of relatively fixed secondary molds can be used adjacent the outside of the primary mold to impart a predetermined shape to portions of the cast object. A continuous ultra-smooth surface is created on the cast objects duplicating the surface of smooth naturally weathered stone.
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