What factors affect the quality of mpp!

The mpp power pipe mainly uses modified polypropylene as the main raw material, which has the advantages of high temperature resistance and external pressure resistance. It is widely used in municipal engineering, tap water, heat pipe, power pipe engineering and other industries. , let's take a look at the factors that affect the quality of the pipeline, and pay more attention in normal use:

First of all, in the processing process, many factors in the middle are very important to the quality of the pipe. For example: raw material selection, temperature, screw speed, compressed air, traction speed, traction cooling, etc. will all affect the MPP power pipe.

1. Influence of screw speed on pipe quality: The choice of screw speed directly affects output and quality. The screw speed depends not only on the size of the extruder, but also on the size of the upper pipe. When the rotation speed increases, the extrusion volume increases, and the shear force on the material is large, which is helpful for the plasticization of the material, but the residence time of the material in the screw is short, and the excessive friction heat makes the inner wall of the pipe relatively rough and the strength of the pipe decreases. Therefore, the control of screw speed should be weighed according to the requirements of output, product appearance and physical and mechanical properties.

2. The influence of temperature on the quality of MPP power pipe: temperature is the main factor affecting plasticization and plastic pipe production. If the temperature is too low, the plasticization is not good, and the temperature is too high, and the material is easy to separate. The temperature control should be determined according to the original formula, extruder and head structure, screw speed and other factors. When processing hard pvc pipes, since the processing temperature is quite close to the separation temperature, 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. The influence of compressed air on the quality of the pipe: the compressed air makes the pipe shape and maintain a certain roundness. The pressure is generally 0.02~0.05mpa

4. The influence of the traction speed factor on the quality of the MPP power pipe: the traction speed directly affects the wall thickness of the product. The pulling speed should match the extrusion speed, usually the pulling speed is 1% to 10% higher than the pipe extrusion speed.

5. The selection of raw materials is a basic and a factor: the specifications and grades of PE raw materials are numerous and numerous. The same grade of raw materials can produce PE corrugated pipes but cannot produce PE water supply pipes. Here, manufacturers still need to do a lot of experiments and choose materials suitable for their own production of pipes.

6. The influence of traction on the quality of the pipe material: I believe everyone is familiar with this point. If the cooling is not enough, the extruded material will stick and cannot be shaped. It adopts air cooling combined with water cooling, and the cooling water temperature should be kept at about 15°.