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  3. Introduce you the production method of p...

Introduce you the production method of prestressed plastic corrugated pipe equipment

Introduce you the production method of prestressed plastic corrugated pipe equipment



There are many factors in the production process of prestressed plastic corrugated pipe equipment that will affect the quality of the pipe. Therefore, in order to ensure the overall quality of the pipe, we need to master some methods. For HDPE double-wall corrugated pipes, we need to master The following methods:

1. Selection of screw speed

The speed of the screw depends on the size of the extruder and the size of the upper pipe diameter. The increase of rotation speed and extrusion volume will produce a great shear force on the material, which is conducive to the plasticization of the material. However, the residence time of the material in the screw is relatively short. Excessive frictional heat will make the inner wall of the pipe rough and reduce the strength of the pipe. Therefore, the control of the screw speed should be fully balanced according to the output value, the appearance of the product, and the requirements of physical and mechanical functions.

Prestressed plastic corrugated pipe equipment

   2. Material selection

  There are many standard trademarks for pipes. Raw materials with the same trademark can produce HDPE double-wall corrugated pipes, but cannot produce PE water supply pipes. Here, the manufacturer still needs to identify itself, select the appropriate pipe material, and test the function of the material at the time of choice.

  3. Compressed air and traction speed

  Compressed air shapes the tube and maintains a certain roundness. The pressure is usually 0.02~0.05mpa, and the pulling speed should match the extrusion speed. The extrusion speed is usually 1~10 higher than the extrusion speed of the pipe. The structure of the double-wall corrugated pipe extrusion die is relatively complicated. Its main feature is that it is divided into internal and external laminar flow channels in the same mold. Compressed air is introduced between the interlayers of the inner and outer flow channels to help the outer layer corrugate on the forming module. At the same time, the water pipe of the sizing sleeve also passes through the mandrel. In order to compensate for the heat loss caused by the passage of water, it is usually necessary to heat the inner wall of the handpiece. In the production of large-diameter pipes, single-screw extruders are usually used for polyolefin pipes, and their extrusion ratio is much smaller than that of twin-screw extruders. Therefore, two-layer co-extrusion technology with two extruders is usually used, which can not only ensure the output, but also increase the output. The corrugated pipe forming mold is mainly a module, which determines the basic structure and size of the corrugated pipe. The structure of the module is different due to different molding methods and different trajectories of the module. At present, most production lines absorb the blanks on the inner surface of the mold by vacuuming the module, and the module is equipped with a vacuum channel.

Prestressed plastic corrugated pipe equipment

The impact of the machine head on the product: Compared with the ordinary pipe head structure, the corrugated pipe extruder has a small die gap and a large die length-to-thickness ratio. The pipe wall runner is particularly long and the gap is also small. It should be done as much as possible during the production process. Avoid excessive pressure and excessive shearing to cause melt fracture.

4. Unstable temperature

When processing hard pvc pipes, since the processing temperature is relatively close to the differentiation temperature, the material temperature at each point should be strictly controlled during the production process. If the temperature is too low, the plasticization is not good, and the temperature is too high, and the materials are easy to distinguish. Temperature control should be determined according to the original formula, extruder and die structure, screw speed and other factors, and attention should be paid to the external error of temperature measurement and the orientation of the measurement point.If you want to know more about it please do not hesitate to contact me. WhatsApp:+86-15966835076.

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