What is the reason for the quality problem of PVC layflat hose

  • Categories:Industry News
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  • Time of issue:2022-04-27
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(Summary description)PVC layflat hose is currently widely used in many fields, even involving food, medical and other fields, so the quality of PVC layflat hose is very important, and the current common problems are caused by the production process and the quality of PVC layflat hose.

What is the reason for the quality problem of PVC layflat hose

(Summary description)PVC layflat hose is currently widely used in many fields, even involving food, medical and other fields, so the quality of PVC layflat hose is very important, and the current common problems are caused by the production process and the quality of PVC layflat hose.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2022-04-27
  • Views:0
Information

PVC layflat hose is currently widely used in many fields, even involving food, medical and other fields, so the quality of PVC layflat hose is very important, and the current common problems are caused by the production process and the quality of PVC layflat hose. What is the cause of the problem?

Best PVC layflat hose from China manufacturer
1. Matte surface
This phenomenon occurs in the PVC layflat hose because the temperature of the die head is too low, or the inner wall of the die head is not dry, the supply of net compressed air is insufficient, or air leakage. To solve this situation, you can increase the temperature appropriately and clean the mold. At the same time increase the air supply or check for air leaks and repair.
2. Uneven wall thickness
This situation may be caused by incorrect positioning of the core mold and mold, uneven plasticization, abnormal traction, unstable compressed air, or unstable head temperature. To solve this situation, first adjust the center position of the core mold and the mold, then check the traction device, strengthen the control of the plasticizing system, check whether the head heating device is in good condition, and stabilize the temperature around the head.
3. Surface black stripes
This situation of PVC layflat hose is due to uneven dispersion of raw material additives, poor flowability of raw materials, high temperature of head and filter screen, poor structure of head filter screen and manifold, and uncleaned filter cleaning lead. In response to this situation, first check the filter screen and the shunt plate, clean the filter screen, you can choose to improve the raw material formula, strengthen the stirring, improve the dispersion performance, and appropriately reduce the temperature.
4. Surface wrinkles and ripples
Wrinkles and ripples appear on the surface of the PVC layflat hose, mainly due to uneven mold discharge, excessive mold temperature or uneven heating, and insufficient cooling and cooling water supply during the production process. The setting device causes the water temperature to be too high and the traction speed to be too slow. In response to this situation, the temperature can be reduced by adjusting the mold gap and checking whether the heating device is damaged. It can also increase the water supply and speed up the traction.
5. Cracks appear in the inner wall
Cracks appear on the inner wall of the PVC layflat hose, which is mainly caused by the mixing of raw materials with impurities. It may also be that the temperature of the mandrel and barrel is low, the pulling speed is too fast, and the lubricating oil is too much. In this case, raw material pretreatment can be carried out, the temperature of the core mold and the barrel can be increased, and the pulling speed can be slowed down.

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