The sheet extruder is composed of extrusion, calendaring, traction and rolling. The main parts are abrasion resistant, resistant to corrosion, high-temperature resistant by high quality specially-treated. Low resistance force in die head extruding channel makes sheet thickness evenly, the internal spiral tank in three rollers ensures an effective cooling and it is easy to change and install net changer with the hydraulic pressure unit, no need to stop machine. The machine extrudes PP/PS granule to PP/PS sheet with single color, which is used for producing plastic products by plastic thermoforming machines, like cups, food container, trays, dishes, bowls, lids, etc.Double working station is easy to receive sheet, if one roller is full, we can use another roller. It do not need to stop the machine to save time.One roller can hold 500-600KG sheet, the finished sheet roller diameter can be around 800mm .after nitrogen treatment with optimum hardness, strong corrosion resistance