RTM MOLDING METHOD USING EXPANSIBLE CORE AND MOLDED PRODUCT MOLDED THEREBY

摘要

PURPOSE:To obtain a molded product with high fiber content by an RTM method and to easily form a preformed product. CONSTITUTION:Vinyliden chloride type expansible microballoons are received in a core mold 11 and heated to mold an expansible core 10 whose volume is about 80-20% of the outer shape of a molded product and reinforcing fibers 12 are laminated and fixed to the outer peripheral surface of the expansible core 10 to form a preformed object 13. This preformed object 13 is set to RTM molds 14a, 14b and the expansible core 10 is re-expanded to bring the reinforcing fibers 12 of the preformed molded object 13 into close contact with the inner wall surfaces of the RTM molds 14a, 14b and, in this state, a resin is injected into the RTM molds to be infiltrated into the reinforcing fibers 12 of the preformed molded object 13 to produce a molded product.