Material HDPE Voltage Pending Clamping force 1200KN Distance between platens 800-2000mm Plasticizing 500kg/h Screw L/D ratio 30:1 Huayu 220L two-layer double-ring drum blow molding machine is a high-efficiency and stable hollow molding equipment specially developed for mass production of 220-liter plastic double-ring barrels. This machine adopts a two-layer co-extrusion structure, which can separately control the formula of the inner and outer layers of the plastic product.