A die head for a plastic hollow container extrusion blow molding machine comprises a die head support mounted on a die head frame, which fixes the die head. The die head includes a die head upper cover and a die head main body with a material storage chamber formed inside. The die head upper cover communicates with the barrel and the material storage chamber via a joint neck. A material injection ring is installed in the material storage chamber and connected to the piston rod of a material injection oil cylinder through material injection pillars. The lower end of the die head main body is connected to an outer die, with a core die at the center of the outer die. An annular extrusion opening is formed by the gap between the core die and the outer die. A wall thickness adjustment oil cylinder is arranged above the material injection oil cylinder, fixed to the die head upper cover via a connecting piece. The piston rod of the wall thickness adjustment oil cylinder is connected to an adjustment rod matching the inner cavity of the core die, and the lower part of the adjustment rod is fastened to the outer die. This technical solution can adjust the wall thickness of the material tube according to the geometric shape of the product, coordinating the wall thickness of each part of the material tube with the final product, achieving uniform wall thickness of the blow-molded product and improving molding efficiency and product strength.
Country Code: CN
Application Number: CN200820162065.6
