BLOW MOLDING METHOD

摘要

In a blow molding process in which a gas is blown into a parison within a mold (7) to inflate the parison so that the parison is intimately contacted with a mold shaping portion to form a hollow molded product (6), and the gas within the hollow molded product (6) is discharged for the purpose of cooling, the blow molding process being characterized in that an internal gas pressure of the hollow molded product (6) is set to 5 to 8 kgf/cm<2> (G) and the gas satisfying the expression F >/= 10 x W Äwhere F: gas flow rate (N1/min) and W: hollow molded product weight (g)Ü is discharged while blowing.