Molding process utilizing a mold release membrane
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United States of America Patent
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-
Sep 11, 1990
Grant Date -
N/A
app pub date -
Apr 7, 1989
filing date -
Apr 7, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Molded plastic articles are prepared by disposing a mold release membrane across a mold section, closing the mold, injecting polymeric precursor materials behind the membrane causing it to conform and adhere to the mold cavity surface, and thereafter parting the mold sections and parting the molded plastic article away from the release membrane which remains adhered to the mold cavity surface. Subsequent injections may be used to prepare additional molded plastic articles, thereby reusing the release membrane which at all times remains adhered to the mold cavity surface.
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