| 摘要 |
PURPOSE:To provide a blow molding device which can secure the almost uniform wall thickness on a face controlled in the parison extruding direction and also on a face crossing almost square the parison extruding direction and eliminate the work of replacing a die and a core with desired openings fit for a molding face of a mold. CONSTITUTION:In a blow molding device for blow molding a parison 1 of a cross section shape crossing square in the extruding direction positioned in a mold 4, a stretching means 6 for stretching a parison site on the upper section of the mold outwardly, and forming the cross section shape close to the molding shape 4C of the mold is provided in the state of positioning the parison. |
