| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection blow molding method and an injection blow molding machine for not only molding stably a product free from flash and unevenness at low cost but also used for various kinds of resin. SOLUTION: An injection blow molding method comprises an injection process of injecting molten resin into an injection molding die 11 to mold a parison and cooling the same a first transfer process of carrying the parison into a preliminary blow mold, a preliminary blowing process of expanding slightly the parison by air pressure in the preliminary blow mold 12 and temperature controlling the parison to set the uniform temperature, a second transfer process of carrying the parison after preliminary blowing into a blow mold 18 a blowing process of expanding the parison by air pressure in the blow mold 18 and forming the parison into the product shape and a release process of releasing a molded product out of the blow mold. As the blow molding is carried out after uniformizing the temperature of the parison, unevenness is hard to generate on the molded product. |
