| 摘要 |
PURPOSE:To manufacture a thin wall-thickness light-weight fiber-reinforced plastic molded form having high fiber content by using a mandrel composed of a plastic film and having hollow structure, setting the mandrel and a fiber layer for reinforcement into an outer die and working fluid pressure to the mandrel. CONSTITUTION:A mandrel is swollen to a specified shape, and given shape retention, and a braided sleeve consisting of fibers for reinforcement, a tape, cloth, etc., are laminated around the mandrel, thus forming a fiber layer 20 for reinforcement. The fiber layer 20 for reinforcement and the mandrel 3 are deformed, the fiber layer 20 for reinforcement is arranged in a shape that it is not held between the mating surfaces of a top force 11 and a bottom force 12 when the top force 11 is closed, and the top force 11 is closed and the molds are clamped. Fluid pressure is worked to the mandrel 3 again and the mandrel 3 is expanded, the deformation of the mandrel 3 and the fiber layer 20 for reinforcement is corrected, and the mandrel 3 is deformed so as to be formed in a shape along the inner surface of an outer die 10 while forming a proper clearance to the inner surface of the outer die. A molding resin as a liquid resin 22 such as an epoxy resin, a cold-setting type unsaturated polyester resin is injected into an air gap between the outer die 10 and the mandrel 3 from a resin filler hole 18, and unified with the fiber layer 20 for reinforcement and cured. |
