| 摘要 |
PURPOSE:To conduct both drawing and injection molding in one process to obtain a composite body having a good interlayer adhesion without an occurrence of wrinkle or breakage by a method wherein after a composite sheet of a metallic sheet material and a thermoplastic resin is pressed against a fixed mold by a ring piece, a resin is injected into a cavity, and a movable mold having a curved surface is closed while the pressing force of the ring piece is controlled. CONSTITUTION:A composite sheet 16 in use is obtained by laminating a thermoplastic resin 20-500mum thick on at least one surface of a metallic sheet material 30-600mum thick. It is preferable that the thermally deforming temperature of the resin to be laminated on the opposite side of a resin injecting side is equal to or higher than that of an injecting resin. An air cylinder 11 is provided in a movable mold plate 8 of a mold. A ring piece 13 is fixed to the top end of a piston. Before a convex surface of a movable mold plate 10 abuts on the sheet 16 after the start of clamping, the sheet 16 is clamped between the ring piece 13 and a cavity block mold plate 6. The mold is closed until a compression zone remains while the clamping force is controlled. Next, the resin is injected, thereafter being compressed while the clamping force of the ring piece 13 is controlled. |
