B - Operations – Transporting – 29 – B
Patent
B - Operations, Transporting
29
B
B29B 11/16 (2006.01) B29B 15/08 (2006.01) B29B 15/10 (2006.01) B29C 70/00 (2006.01) B29C 70/54 (2006.01)
Patent
CA 2050144
A method for forming stabilized preforms for complex composite articles is disclosed using a solid meltable uncatalyzed thermosetting resin as the stabi- lizing agent. The resin is applied to each layer of the preform and heated to melt the resin and bond the layers together. After cooling, the resin resolidifies but does not set and thereby holds the layers in the desired preform shape. The layers can be first formed into a flat sheet as a raw material from which shaped preforms can be made by cutting the sheet into sections which are placed over a mandrel and reheating to thereby remelt the solid resin to allow the preform to conform to the shape of the mandrel. Utilizing this process allows complex composite parts to be easily preformed and assembled prior to placement in a mold for resin injec- tion molding, without inhibiting part strength as the resin is compatible with the injection resin and is co- catalyzed by the catalyst contained in the injection resin.
Brace Michael Wayne
Flonc Nicholas Peter
Dow-Utc Composite Products Inc.
Swabey Ogilvy Renault
LandOfFree
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