INJECTION BLOW MOLDING METHOD AND PRESSURIZED FLUID PRESS INJECTING AND DISCHARGING DEVICE USED THEREFOR

摘要

PURPOSE:To effectively prevent penetration of molten resin into a pressurized fluid passage without setting a complicated size of the tip of the passage and to effectively press inject the fluid. CONSTITUTION:At the time of injecting a molten resin, the tip of a pressurized fluid passage 1 is closed by a cotter 4 to make the cotter 4 protrude into molds 3 thereby to open the tip of the passage 1 and the fluid is press injected or discharged in a state that solidified resin layer 19 is pierced and broken.