... 2.stable performace 3.plastic extruder 4.CE&ISO9001 Conical Twin Screw Extruder (double screw extruder, plastic extruder)Feature and structure ... :SJSZ series cone twin screw stem extruder is composed of barrel screw, gear transmission ... , Russia, Canada, Brazil, Iran, New Zealand and so on. Conical Twin Screw Extruder