Molding process utilizing a mold release membrane

Details Molding process utilizing a mold release membrane Molding process utilizing a mold release membrane

1989-04-07

1990-09-11

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Forming plural articles

264316, 2643286, 264334, 264338, B29C 3362, B29C 4500

Patent

active

049561413

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.

REFERENCES:
patent: 3576930 (1967-12-01), Watters et al.
patent: 4031176 (1977-06-01), Molbert

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