| 摘要 |
PURPOSE: To obtain a laminated blow molding of high quality excellent in surface transfer properties and having a smooth surface free from difference in level by holding a resin sheet between a mold cavity surface and the surface of a parison to close molds and heating the molds to the temp. softening the surface of the resin sheet simultaneously with performing blowing. CONSTITUTION: A resin sheet S is suspended in such a state that both molds 8, 8 are opened and pinched at the lower end part thereof by a sheet clip 24 to be held to a state stretched up and down. Then, a parison P is extruded from the lower end of a die head 2 by an injection device. During this period, the molds 8, 8 are preliminarily raised in temp. Next, the molds are clamped to horizontally cut the upper end of the resin sheet S by a cutter 30 and molding is performed in such a state that the resin sheet S is laminated to the surface of the parison P. The cavity surfaces of the molds 8, 8 become a temp. state near to the softening point of the resin sheet S and the surface of the resin sheet S is softened to become a molten state and the surface of the parison P and the surface of the resin sheet are bonded and integrated under pressure by the compressed air blown into the parison P. |
