METHOD AND MOLD DEVICE FOR BLOW MOLDING

摘要

PURPOSE:To make the fitting space of a cylinder smaller by providing a cylinder for driving a striking pin and a cylinder for driving a post striking core under a specific condition. CONSTITUTION:Pressure oil is sent out from the oil supply and discharge port 19 of a cylinder 15 for driving a striking pin, and a piston is pressed therebi to drive the striking pin 17 into the cavity 11. Pressure oil is then sent out from the oil supply and discharge port 21 of a cylinder 16 for driving a post striking core to drive the post striking core 18 toward the cavity 11. The end of the parison 24 is pushed into the nozzle molding portion 12a to form a nozzle. Under the condition, air is blown into the parison.