... control 2.Speed of Screw:1~35rpm Custom Design PVC production line SJSZ series conical twin screw extruder mainly ... exhaust, heating, cooling and electrical control components Etc. Products: of PVC plastic pipes, profiles, sheets, plates, boards, bars, palletizing ... , and easy-decomposition. The special designed screw, gear box and mouldmake the line reliable and easy operation. Configuration list ...