NEW   PS  foam sheet extruder  applies twin-stage series foaming technique and is formed by the main following parts: blending materials parts, extruding parts, auxiliary parts, blister filling parts etc. The complete appliance applies full-frequency conversion controlling and hydraulic full-automatic device of net changing. The characteristics of our equipment are dispose superiorly; design rationally, high output, low energy consumption and high systematic stability etc. The products are hard foamed plastic boards that use polystyrene as the raw materials plus other accessories and fireproofing agent. Pressing forming through heating and mixing together plus the catalyst meanwhile forms them. Theproducts have unparallel quality of heat preservation, good quality of resisting the pressure and quality of resisting the aging. The products are widely used as the thermal retardation materials that are widely used in American-European countries. They are widely used in thermal-insulation and thermal-retardation system of the roof, keeping-dry insulating layer of the ground, thermal-insulation insulating layer of the internal-external wall, indoor decoration, the advertising board, suspended floor system etc. As the ideal materials of thermal-insulation, thermal-retardation, keeping-dry and resisting compression, the products' market prospects are very wide.