PRESS BLOW MOLDING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a press blow molding apparatus which can adjust thickness deviation of a parison without moving an extrusion die.SOLUTION: An extrusion head 1 includes: a thickness deviation adjustment ring 8 and an extrusion die 7 housed in a recessed portion 6a; a holder 10 for restraining the ring 8 and the die 7; and a core 9 which is inserted into the thickness deviation adjustment ring 8 and the extrusion die 7 and forms a resin path 11. Four adjustment bolts 14a to 14d are provided at an angle phase of 90 degrees in the periphery of the thickness deviation adjustment ring 8. The respective adjustment bolts 14a to 14d come in contact with the outer peripheral surface of the thickness deviation adjustment ring 8. The thickness deviation adjustment ring 8 is displaced in a radial direction according to forward/backward movements based on the rotation operation of each of the adjustment bolts 14a to 14d, and accordingly the thickness of a parison is adjusted.SELECTED DRAWING: Figure 3