EXCHANGE DEVICE OF DIE AND CORE, DISASSEMBLY DEVICE OF DIE AND CORE, RESIN REMOVING DEVICE AND FITTING DEVICE FOR DIE AND CORE

摘要

PURPOSE:To improve productivity by contriving curtailment of time required for exchange operation, by a method wherein a core is formed fittably with a screw into a parison head and a die is formed attachably and detachably to the parison head with a split ring. CONSTITUTION:When an attaching and detaching device of a core is applied to the core 14 fitted to a parison head 10 by actuating the same, the core 14 is removed through release of screw fitting. When the diameter of a split ring 16, which is fitted over the external circumference of a die 13 through contrac tion of a die by actuating an attachment and detachment device 17, is expanded, the die 13 is released from the split ring 16 and removed from the parison head 10. Then when a cutter 121 is turned by approaching a cleaning device 120 to a parison head 10 from which the die 13 and core 14 have been removed to make it no difficulty in fitting the fresh die and core, molten resin remaining in the parison head 10 is removed.