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  4. Common problems of PE water supply pipe ...

Common problems of PE water supply pipe extruder

Common problems of PE water supply pipe extruder

PE pipe is a common profile in building water supply system. With the vigorous development of PE pipe in the Chinese market, the product has not only been limited to building water supply, but has also been gradually developed and applied to many industries, such as: farmland irrigation, urban underground Pipeline laying, ground source heat pumps, landfills, etc. Therefore, the quality of pipes is the focus of attention of manufacturers and users. How to grasp the quality of pipes has become the research focus of many companies or units.

Tools / raw materials
During the processing of PE pipes, there are many factors that affect the quality of the pipes, such as: raw material selection, temperature, screw speed, compressed air, traction speed, traction cooling, etc.

Method / Step
1
The influence of the choice of raw materials on the quality of the pipe: the choice of raw materials is the first factor and the most basic factor: there are many types and specifications of PE raw materials, and the same kind of raw materials can produce PE bellows but cannot produce PE water supply. tube. Here, it is necessary for the manufacturer to go through a lot of experiments and choose materials suitable for its own production.

2
The effect of temperature on the quality of PE pipes: temperature is the main factor affecting the plasticization and production of plastic pipes. If the temperature is too low, the plasticization is not good; if the temperature is too high, the material is easy to decompose. The temperature control should be determined according to factors such as the formula, the structure of the extruder and the head, and the screw speed. When processing hard PVC pipes, the processing temperature and decomposition temperature are quite close, so the material temperature at each point should be strictly controlled during production. At the same time, pay attention to the error of the temperature measuring instrument and the position of the measuring point.

3
Effect of screw speed on pipe quality: The choice of screw speed directly affects the output and quality. The screw speed depends on the size of the extruder and the diameter of the pipe. Increased rotation speed, increased extrusion volume, large shear force on the material, which helps the plasticization of the material, but the residence time of the material in the screw is short, excessive friction heat makes the inner wall of the pipe rougher, and the strength of the pipe decreases Therefore, the control of screw speed should be fully weighed according to the output, product appearance and physical and mechanical properties.

4
The influence of traction speed on the quality of PE pipes: the traction speed directly affects the product wall thickness. The traction speed should be matched with the extrusion speed, usually the traction speed is 1% ~ 10% higher than the pipe extrusion speed.

5
The effect of compressed air on the quality of the pipe: compressed air makes the pipe shape and maintains a certain roundness. The pressure is generally 0.02 ~ 0.05mpa.

6
The effect of traction cooling on the quality of the pipe: failure to cool will cause the extrudate to stick and cannot be shaped. It is best to use air cooling combined with water cooling, and the temperature of the cooling water should be kept at about 15 °.

If you want to know more about it please do not hesitate to contact me. WhatsApp:+86-15966835076.


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