B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/1119
B29C 35/02 (2006.01) B29C 43/10 (2006.01) B29C 70/44 (2006.01) B29C 43/12 (2006.01)
Patent
CA 1299334
Abstract Method for Molding Using a Dual Solid Flowable Polymer System A method of molding an article utilizing two types of solid flowable particulate polymer pressurizing media wherein one medium is protected from thermal degradation by a second medium. The method comprises disposing an article precursor within a pressure vessel and disposing a first solid flowable polymer medium that is substantially thermally stable at temperatures in excess of about 316°C so that it is capable of transferring a substantially uniform, predetermined medium pressure to the surface of the article precursor. A second solid flowable polymer medium is disposed so that it is capable of transferring a substantially uniform, predetermined medium pressure to the first polymer medium. The second medium is caused to produce a substantially uniform medium pressure so that said pressure is transferred to the surface of the article precursor and the article precursor is exposed to temperatures in excess of about 316°C. The second polymer is protected from thermal degradation by the thermal stability and high insulative capability of the first polymer medium.
546462
Swabey Ogilvy Renault
United Technologies Corporation
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