METHOD FOR MANUFACTURING HOLLOW MOLDED ARTICLE, AND MOLDING DIE

摘要

PROBLEM TO BE SOLVED: To solve a problem of failing to prevent the formation of chips caused by using a drill in boring an insertion hole for inserting a reinforcing pipe in a cavity in an automobile deck board formed by blow molding of thermoplastic resin. SOLUTION: After clamping a parison by split dies, a hollow body with a radial cutting edge body slidably provided inside the split dies is advanced in a die cavity to penetrate into the parison. Compressed air is then blown into the parison through the hollow body with the radial cutting edge body to shape the parison, and then the hollow body with the radial cutting edge body is retracted into a matrix part to perform mold release of a hollow molded article. The reinforcing pipe is pressed and inserted into the insertion hole formed in a petal-like torn state of a mark after pulling out the hollow body with the radial cutting edge body. COPYRIGHT: (C)2009,JPO&INPIT