A Brief Analysis Of Popular PE Pipe Sizing Devices

The host of the extrusion hard pipe production line:
1. Extrusion system: screw, barrel. Melt plasticization and provide pressure.
2. Transmission system: motor, reducer, etc. Drive screw (torque and speed).
3. Heating and cooling system: meet the temperature requirements.
Auxiliary machines for extrusion hard pipe production line:
1. Mouth mold (forming device): It is the main forming component of product forming;
2. Setting device: fix the shape and size, and ensure the smoothness of the product;
3. Cooling device: sufficient cooling to prevent deformation;
4. Traction device: Evenly lead out the product and change the size by adjusting the speed;
5. Cutting device: Cut the continuously extruded product into a certain length according to the requirements;
6. Stacking or coiling device: used to neatly stack hard products that have been cut into a certain length, or to wind soft products into rolls.
For the practical application of PE pipes in related water supply pipes, different shaping structures can be selected based on different materials, production speed, and quality requirements. Currently, there are two popular shaping devices for PE pipes: cylindrical sizing sleeves; Sheet combination type sizing sleeve.
In these two types of sizing devices, cylindrical sizing sleeves are widely used. It has a wide range of applicability and can meet the extrusion molding requirements of PE pipes:
1. The sheet-like combined sizing sleeve is mainly designed for the production of small diameter, high-speed extruded PE pipes, with a range of applicable diameters: Φ 20~ Φ 63MM, can achieve an extrusion speed of 35M/MIN or higher depending on the diameter of the pipe and the processed material. The sheet shaped shaping device is composed of multiple layers of thin copper sheets, with a fixed diameter circular hole in the middle and fixed by a support column on the outer side. The distance between each layer of thin copper sheets is distributed according to the following rule: along the direction of billet introduction. The distance gradually increases, and the distance between the copper sheets becomes smaller near the inlet end of the billet to prevent the billet that is still in the plasticized state from accumulating and squeezing between the thin sheets. As the hard layer on the surface of the pipe forms, the distance between the copper sheets can gradually increase.
For cylindrical sizing sleeves, the stability and uniformity of the water flow introduced into the water ring directly affect the extrusion quality of the pipe, while the cooling rate of the molten material in the sizing sleeve can directly affect the quality of the inner wall of the pipe.