Illustration: the working principle of transparent PMMA.PC tubing extruder is as follows: extruded by the die of the single screw extruder, finalized by the vacuum, cooling by the cooling trough, towed by the tractor and then cutting by planetary cutting machine or the saw cutting machine. It characterized by stable performance, convenient observation, low noise and high quality and low price. This kind of equipment applies to producing not only transparent and semitransparent hard pipe, such as PVC fire retarding pipe, PVC soft pipe, PE.PP.PS PMMA, ABS.PC etc.but also the high-level transparent organic glass pipe.