Abstract: A blow molding capable of maintaining the parison thickness distribution uniform, fabricating high-quality molded products, and improving its productivity. A parison supply device for supplying, to a blow mold, a parison discharged from an extrusion die, the parison supply device including: a pair of chucks for pinching, from above and below, a parison discharged downward from the extrusion die; and a chuck operation part for controlling an operation of pinching the parison by the pair of chucks and an operation of moving the pair of chucks. By the chuck operation part, the pair of chucks performs the operation of pinching the parison while being moved downward.

Abstract: A blow molding apparatus improves productivity and obtains a high-quality molded product by supplying a good-quality parison to molds. A blow molding apparatus includes: a die head which discharges a parison; a parison supplying part which cuts the discharged parison at a preset length and conveys the cut parison; and a blow molding part in which the supplied parison is clamped between blow molds so as to perform blow molding. The parison supplying part has a pickup chuck which conveys the cut parison alternately to a first supplying position set on one of right and left sides with respect to a discharge center of the die head and a second supplying position set on the other of right and left sides with respect to the discharge center. The blow molding part performs blow molding at the blow molds arranged at the first supplying position and the second supplying position, respectively.

Abstract: A blow molding capable of maintaining the parison thickness distribution uniform, fabricating high-quality molded products, and improving its productivity. A parison supply device for supplying, to a blow mold, a parison discharged from an extrusion die, the parison supply device including: a pair of chucks for pinching, from above and below, a parison discharged downward from the extrusion die; and a chuck operation part for controlling an operation of pinching the parison by the pair of chucks and an operation of moving the pair of chucks. By the chuck operation part, the pair of chucks performs the operation of pinching the parison while being moved downward.