... 2.stable performace 3.plastic extruder 4.CE&ISO9001 Conical Twin Screw Extruder (double screw extruder, plastic extruder)Feature and structure ... cone twin screw stem extruder is composed of barrel screw, gear transmission system, measurable feeding, vacuum deaerating, heating, cooling and electric control ... , Russia, Canada, Brazil, Iran, New Zealand and so on. Conical Twin Screw Extruder