B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
26/108
B29D 99/00 (2010.01) B29C 70/46 (2006.01) B29C 70/86 (2006.01) B64C 11/26 (2006.01) C08J 5/04 (2006.01)
Patent
CA 1173639
-18- Method of Making Fiber Reinforced Articles Abstract An improved method is disclosed for forming articles, especially airfoils, comprised of a fiber reinforced plastic bonded to a metal object. In the manufacture of a propeller blade a subassembly is made by coating a metal spar with a certain class of adhesive to a depth of 5-40 mils to compensate for dimensional variations in the spar surface, transferably coating the interior of a sub assembly mold with the adhesive, then inserting the coated spar into the mold and injecting a lightweight filler material. The adhesive and filler are then pre- cured and the subassembly removed from the mold. fibrous reinforcing material, such as glass fiber cloth, is then used to cover or wrap the subassembly, the sub- assembly thus covered is placed in a second mold, and a synthetic polymeric material such as epoxy resin, pre- viously or subsequently applied is then cured. In the formation of other articles, the filler material might be entirely omitted, and the reinforcing fibers would be separated from a metal substrate only by the precured adhesive. H-979-PP
386291
Swabey Ogilvy Renault
United Technologies Corporation
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