| 摘要 |
PURPOSE:To accelerate the molding cycle in the titled device for manufacturing a hollow molding by a method wherein blowing segmental dies and an inverting die are opened after they retrograde by a specified distance as the blowing segmental dies are closed after the hollow molding is blow-molded. CONSTITUTION:When a hollow molding is molded by the use of an injection blow molding machine composed of an injection die 2, blowing segmental dies 6, an inverting die 3, etc., a bottomed parison is injection-molded in the cavity provided between the injection die 2 and a core 4. On the other hand, in the blowing segmental dies 6 is molded the hollow molding 10 by blowing compressed air into the bottomed parison through a core 4', the hollow molding 10 retired by a movable cylinder 8 to a given position closing the blowing segmental dies 6, the dies are opened and the hollow molding 10 is dropped. Then, the inverting die 3 is turned over. In this method, when inverting action begins, the fall of the hollow molding 10 has ended, the fall of the hollow molding 10 and the inverting core 4' do not interfere with each other and occurrence of fault products can be prevented. |
