Huade Machinery

Professional plastic pipe extrusion machinery manufacturer

Composition of PE pipe extrusion line

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The PE pipe extrusion production line includes: feeding system, single screw extruder, PE pipe special mold, sizing, cooling system, tractor, ticket collector, control system. 

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The extruder is one of the important core components of the pipe extrusion line, and the main machine used in pipe processing is a single screw extruder. In the design of a single screw extruder, how to achieve high-speed extrusion of high-quality pipes at low processing temperatures 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. , The pressure is distributed uniformly, and the shearing action is strictly controlled to obtain the ideal material temperature.  

In the barrel design, a slotted barrel is used, and a specially designed feeding bushing with a structure is provided. The surface of the inner hole is provided with multiple inclined grooves to ensure high-speed feeding of PE. There is a special design in the feeding section. Cooling device to realize the temperature control of the barrel feeding area and isolate it from the adjacent barrel high temperature area. Each section of the barrel has a temperature-controllable heating section, and it adopts forced air cooling. The output of the extruder has a good linear relationship (to facilitate synchronous adjustment with the traction speed). In order to achieve high-speed extrusion, the gearbox adopts high-torque, low-noise The gearbox and motor power are matched accordingly.

Cooling and shaping device: The function of the shaping die is to ensure that the high-temperature parison extruded from the die gets a fixed geometric shape and size during the vitrification process, and basically eliminates the deformation internal stress and thermal internal stress of the parison during the process. In order 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 continuous extrusion of plastic pipes. Its function is to provide a certain traction and traction speed to the preliminarily shaped PE from the nose, and overcome the friction generated during the cooling and shaping process. , Lead the plastic pipe from the cooling setting device at a uniform speed. And by adjusting the traction speed to adjust the wall thickness of the PE pipe to obtain a pipe that meets the standard. Practice has proved that the tensile strength of plastic pipes produced without traction is obviously lower than that with traction, and the production can be increased when equipped with traction devices. The traction device requires the gripper to be able to adapt to the needs of supporting the processing of various diameter pipes, and can be steplessly and smoothly adjusted within a certain range. During the traction process, the traction speed must be stable. Because any irregular changes will form ripples on the surface of the product, which will affect the quality of the product, the traction clamping force should be moderate and adjustable, and there should be no slipping, jumping or vibration during the traction process to avoid permanent deformation of the pipe.