| 摘要 |
PURPOSE:To form a profile hollow molded article having curved sections or the like without accompanying formation of projections or the like due to the self-adhesion, by spraying a lubricant on the inner surface of a parison to stick to it when the parison is delivered, and blow molding the parison. CONSTITUTION:Use is made of a nozzle 1 comprising an annular resin delivering outlet 4 formed between a die 2 and a mandrel 3, and a passage 5 communicative with a feeding apparatus C provided in the mandrel 3 (the reference numeral 6 designates an extrusion screw for resin). When the parison b is extruded from the deliverling outlet 4 with the nozzle 1 being aligned with a molding groove 14 of a metal mold D, the lubricant c is sprayed from the passage 5 by the feeding apparatus C to be stuck to the inner surface of the parison b. When the parison b is received in the molding groove 14, the feeding of the parison b and the lubricant c is stopped, the members of the metal mold D are closed to cut both ends of the parison by cutting flanges 18, 18, and air is forced-in through the passage 5 to expand the parison b to form the prescribed hollow molded article B in conformity with the molding groove 14. |
