| 摘要 |
PURPOSE:To properly perform injection molding simultaneous patterning without generating large distortion or positional shift even in a molded object large in surface unevenness or curvature. CONSTITUTION:A patterning sheet 15 is held to a female mold 30 by a sheet clamp frame member 50 so as to protrude to the molding cavity of the mold 50 and, thereafter, a flexible planar heating element 60 is inserted in the slit of the sheet clamp frame member 50 and a current is supplied to the heating element 60 to heat and soften the patterning sheet 15 and the heated patterning sheet 15 is sucked from the suction holes 32 of the female mold 30 to be brought into close contact with the inner peripheral surface of the molding cavity. Next, the flexible planar heating element 60 is pulled out of the sheet clamp frame member 50 and the female mold 30 and a male mold 40 are unified to be clamped and a molten resin is injected into the molding cavity to perform injection molding. By this constitution, since the displacement quantity of the thermally softened patterning sheet at the time of the preforming on the surface of the molding cavity of the female mold can be reduced, the generation of strain, wrinkles or rupture in the sheet, the positional shift of a decorative layer with the unevenness of a molded product and the strain of the decorative layer are reduced. |
