the most prominent advantage of PMMA tubing is made by the same raw material. Moreover we can completely recycle, reprocess and use it again, so that the production cost can be greatly reduced and the environment cannot be polluted. In recent years this tubing obtained the rapid development because of its long life, good hygienic performance as well as its strong, thermos table performance. The PMMA tubing production line adopts PLC to process the sequencing controls, and realizes the synchronized velocity modulation by the host electrical machinery of extruding machine and the tractor, and establish good man-machine contact surface, all crafts parameter can be established and demonstrated by the touch screen. When we use it for production we only need to consult the menu, and input the serial number that is established originally, then the entire production line can complete the production according to the originally-set pipe specification and speed. The cutting machine can achieve the cutting at fixed length automatically, the temperature of the die head is controlled by the import intelligent thermometer, which can make the temperature deviation vary within plus or minus 1 degree centigrade, therefore the tubing quality can be guaranteed. The production line uses the man-machine interface operation so that it can be highly automated; besides it gets good plastic effect, high output, and low and even melts body temperature for the use of specific screw. It uses the compound spiral nose to eliminate the material memory effectively. The tubing stress has been eliminated for the vacuum finalizes and the constant temperature control, The cooling water tank is equipped with the compressor refrigeration installment, which makes the line take up less space, use the water economically, and take the leading place inland. Adopting the crowded nose increases the tubing sign streak. The main engine decelerator of the production line has high actuation torque, the heavy lode gear, so it needs extremely low maintenance. Using the PCC computer control system, it not only realizes the producing automation, but also operates more reliably and stably. Using high wear-resisting composition material, the tractor tows steadily and high speed and the service life is long. The brand-new non- filings cutter, cuts the cross section smoothly. Using the advanced electrical timing belt drive makes movement steady, precision high and noise low. It suits the polyolefin processing sieve basket nose, which can obtain the low melt body pressure and the low plasticized temperature, and has quite wide material processing scope. Main Technical Parameter Model SJ-65/28 SJ-90/28 production specification 20-200 100-450 productivity 50-80kg/h 90-150kg/h Main engine model SJ-65/28 SJ-90/28 Stored air pressure 0.3-0.8MPa 0.4-0.8MPa Cooling water current capacity 3000L/h 6000L/h Actuation power 18.5kw 37kw Production line total length 22m 28m