MANUFACTURE OF BLOW-MOLDED PRODUCT WITH HINGE AND BLOW-MOLDED PRODUCT WITH HINGE

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing blow-molded products with hinges easily and efficiently. SOLUTION: A resin parison P is suspended in a gap between the split halves of a die with a protrusion part for forming a hinge and these split halves are closed. Then a pressurized air is blown into one of plural hollow parts formed by sectioning with the pressure contact part of the parison P corresponding to the protrusion part for forming the hinge. Further, the pressurized air is sent into the adjacent other hollow part through a communicating hole opened in the pressure contact part. Next, blow-molded products removed from the die are bent at the pressure contact part.