MANUFACTURE OF FIBER-REINFORCED THERMOPLASTIC RESIN MOLDING

PURPOSE:To obtain a molding which is thin and light in weight and possesses excellent thickness uniformity, by a method wherein at the time of heating, pressurization and molding of a composite molded body, shaping is performed by acting comparatively low fluid pressure upon both a male and female molds in place of clamping pressure by both the molds. CONSTITUTION:A composite material 7 is formed of thermoplastic resin of raw materials and a fiberlike reinforced material. On the one hand, a decorative material and a material for adhesion are arranged beforehand on a mold surface of a recessed mold 1 or a projected mold 1', as required, over which the preheated composite material 7 is arranged. Then mold clamping is performed so that a pressurizing heat resistant film 6 is pinched and held among the molds 1, 1' and a member 4 which corresponds with the mold and usually the whole circumference of the composite material 7 is clamped by clamp parts of the molds 1, 1'. Then mold clamping force is made sufficiently great so that mold break is not generated by the fluid pressure, a fluid is sent in through a flow path 5 for the fluid provided in the member 4 corresponding to the mold at appropriate pressure and speed and the composite material 7 is pressed against the composite material 7 through a heat resistant film. Unnecessary gas is discharged through a gas vent hole 3. After holding for a sufficient cooling time after molding, a molding is taken out of the mold.