The extrusion-discharge screw is located in t Removebreaksection and runs in a cylindrical trough tangentidlinesbelow the 2 mixing blades. When the Sigma Mixer is Withthe discharge screw, we call it Sigma Mixtruder, and themodel name is PSG-X.During the mixing cycle the screw moves the materialwithin the reach of the mixing blades, thus assuring athorough blending of all the ingredients, and, at the sametime, accelerating the mixing process. At discharge time,the direction of rotation of the screw is reversed and themixed material is extruded through suitable die openingsin the side of the machine. The extrusion screw has its ownseparate drive so that blades and screw operateindependently.The extrusion-discharge screw is located in t Remove lebreaksection and runs in a cylindrical trough tangentidlinesbelow the 2 mixing blades. When the Sigma Mixer is Withthe discharge screw, we call it Sigma Mixtruder, and themodel name is PSG-X.During the mixing cycle the screw moves the materialwithin the reach of the mixing blades, thus assuring athorough blending of all the ingredients, and, at the sametime, accelerating the mixing process. At discharge time,the direction of rotation of the screw is reversed and themixed material is extruded through suitable die openingsin the side of the machine. The extrusion screw has its ownseparate drive so that blades and screw operateindependently.