Features of PE pipe extrusion line

The pe pipe extrusion production line is composed of feeding system, single screw extruder, special mold for pe pipe, sizing, cooling system, traction machine, coupon collector, and control system . The extruder is an important core component of the pipe extrusion line. one , the host pipe processing are used single screw extruder. In the design of single-screw extruder , how to realize high-speed extrusion of high-quality pipe at low processing temperature is a key technology.

In the screw design , the bm structure and the barrier structure are combined , and a special mixing section is added , which not only ensures the plasticization effect of the tube blank , but also the material is in each area on the entire screw , and the melt pressure is lower. , pressure distribution , and strictly control the shear , to obtain a desired material temperature.

In the design of the barrel , using a grooved bush , specially designed liner having a feed structure , the inner bore surface having a plurality of grooves having a slope , in order to ensure pe high speed feeding , the design of a special section in the feed cooling means , in order to achieve a temperature control of the barrel and the feeding region isolation barrel adjacent the high temperature zone. Each section has a barrel heating zones may be temperature controlled , forced air cooling , the extruder has a good linear relationship between yield ( to facilitate synchronization with the pulling speed adjustment ), in order to achieve high-speed extrusion , gearbox is high torque, low noise Gearbox and motor power are matched accordingly.

Cooling and sizing device: The function of the sizing die is to ensure that the high-temperature parison extruded from the die can obtain a fixed geometric shape and size during the vitrification process , and basically eliminate the deformation internal stress and thermal internal stress of the parison in the process. , to obtain products that meet the relevant quality standards , it is the main process device in the plastic extrusion molding process.

Traction device: The traction device is a necessary auxiliary device for the continuous extrusion of plastic pipes . Its function is to provide a certain traction force and traction speed to the pe that has been initially shaped from the machine head , and overcome the friction generated during the cooling and shaping process. , so that the plastic pipes are drawn out from the cooling and shaping device at a uniform speed. And adjusted by adjusting the towing speed pe wall thickness of the tube , to obtain a standard pipe. Practice has proved that the tensile strength of plastic pipes produced without traction force is obviously lower than that with traction force , and the output can be increased when it is produced with a traction device. Towing device requirements. The gripper should be able to meet the needs of supporting the processing of various caliber pipes , and it can adjust the speed steplessly and smoothly within a certain range . During the pulling process , the pulling speed must be stable. Because any irregular changes will form ripples on the surface of the product and affect the quality of the product , the traction clamping force should be moderate and adjustable , and there should be no slipping, jumping and vibration during the traction process , so as to avoid permanent deformation of the pipe.