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PE double wall corrugated pipeThe application is more and more extensive, and the requirements for construction are getting higher and higher. Many low-quality PE double-wall corrugated pipes have also been mixed into the market to make huge profits. For non-professionals, it is impossible to distinguish the true from the false. This has caused serious losses to customers. The defects in the use of PE double-wall corrugated pipes are What caused it? Next, Anhui Stone Pipe Industry Co., Ltd. will give you a brief introduction!
1. Uneven inner wall
The uneven inner wall of PE double-wall corrugated pipe is usually caused by low vacuum, high water jacket temperature and thin inner layer. If the vacuum is too small, please check whether the internal vacuum pipeline is unblocked and the vacuum pump is working properly. Too high water jacket temperature is usually caused by too high cooling water temperature or too low cooling water flow, which can be solved by adjusting in these two aspects.
2. There are scratches on the inner layer
Usually due to the high temperature of the material, there will be a paste on the inner mold. Impurities in the material; scratches on the water jacket; scratches on the inner mold.
3. The thickness of the axial wave crest is not consistent.
Normal air flushing is too large, and the mold gap is too large.
4. The weight of the pipe is unstable
Generally, this is because the performance of the raw material is unstable or the temperature of the blanking part fluctuates excessively.
5. There are small holes on the outer wall
The reason is that there are impurities in the material. Loss of temperature control at a certain stage will cause the material to burn, and sometimes the paste will be taken out. Some materials involved, such as functional masterbatch, defoamer, etc., have poor dispersibility and cannot improve the function or phase difference of the pipeline.
The above points are a simple analysis of the reasons for the defects in the use of PE double-wall corrugated pipes. I hope that the introduction of this article can be helpful to everyone!