Molding method and apparatus using a solid, flowable,...

Details Molding method and apparatus using a solid, flowable,... Molding method and apparatus using a solid, flowable,...

B - Operations, Transporting

29

C

18/911

B29C 43/32 (2006.01) B22F 3/15 (2006.01) B29C 43/10 (2006.01)

Patent

CA 1284007

Abstract of the Disclosure Molding Method and Apparatus Using A Solid, Flowable Polymer Medium An article is molded by contacting it with a solid polymer medium, such as an especially low strength unfilled silicone rubber which is solid and able to flow readily. Thermal expansion of the medium or mechanical force is used to create molding pressure and thereby provides a substantially uniform pressure on the article precursor. Various temperature and pressure cycles can be attained; constant high pressures can be maintained on the article precursor during cooldown, optionally aided by flowing of medium to and from a vessel in which the article precursor is being molded. The method is particularly adapted to molding filler or fiber reinforced thermosetting polymer composite articles.

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