Extruder – the BOCOMATIC extruding machine is designed and determined for extrusion of thermoplastic materials. The basic components of the extruder – extruding machine BOCOMATIC is a closed structural body – machine base, electric and control case, gearbox, main asynchronous motor with stepless rpm regulation for by frequency controlled gears, chamber-output barrel with screw, a set of heating zones with cooling air ventilators and other partial components. Extruder – the BOCOMATIC extruding machine is a machinery which is fluent supplied from the hopper by a solid thermoplast. The material is in the place of the fill-up aperture taken by the revolving screw which is placed in the chamberoutput barrel and in the chamber - working barrel transported by the screw to the head or adaptor which is placed on the machine output. The perfect material processing is based on the rotary screw motion with suitable designed screw geometry in consequence of it happens the feed of the thermoplast in the output barrel and at the same time by interaction of heat and pressure his succesive conversion to the liquid stadium.