What causes the quality problem of PVC discharge hose

  • Categories:Industry News
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  • Time of issue:2021-06-18
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(Summary description)PVC discharge hose is currently widely used in many fields, even involving food, medical and other fields, so the quality of PVC discharge hose is very important, and the current common problems are caused by the production process, what is the quality problem of PVC discharge hose? The cause?

What causes the quality problem of PVC discharge hose

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

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2021-06-18
  • Views:0
Information

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

quality PVC discharge hose from China manufacturer
1. Matte surface
The main reason for this situation in PVC discharge hose is that the temperature of the die is too low, or the inner wall of the die is not dry, the net compressed air supply is insufficient or air leakage. To solve this situation, the temperature can be appropriately increased, the die can be cleaned, and the air supply can be increased or the air leakage can be checked and repaired.
2. Uneven wall thickness
This situation of PVC discharge hose may be caused by incorrect positioning of core mold and die, uneven plasticization, abnormal traction, unstable compressed air, or unstable temperature of the machine head. To solve this situation, firstly adjust the center position of the core mold and the die, then check the traction device, strengthen the control of the plasticizing system, check whether the heating device of the machine head is intact, and make the temperature around the machine head stable.
Third, the surface black lines
This situation of PVC discharge hose is mainly due to uneven dispersion of raw material additives, poor fluidity of raw materials, high temperature of the head part and filter, poor structure of the head filter and splitter plate, and the filter is not cleaned. resulting in. In view of this situation, first check the filter screen and the splitter plate, and clean the filter screen. You can choose to improve the raw material formula, strengthen the stirring to improve the dispersion performance and appropriately reduce the temperature.
Fourth, surface wrinkles and ripples
Wrinkles and ripples on the surface of the PVC discharge hose are mainly due to uneven discharge of the die during the production process, excessive die temperature or uneven heating, insufficient water supply for the cooling and shaping device, and high water temperature, and the traction speed is too slow. In view of this situation, you can adjust the gap between the die and check whether the heating device is damaged to reduce the temperature. You can also increase the water supply and speed up the traction speed.
Five, cracks appear on the inner wall
The cracks on the inner wall of the PVC discharge hose are mainly caused by the raw materials mixed with impurities. It may also be caused by the low temperature of the core mold and the barrel, the excessively fast traction speed and too much lubricant. In this case, the raw material can be pretreated to increase the temperature of the core mold and the barrel to slow down the traction speed.
The above are the quality problems of PVC discharge hose caused by errors in the production process. Manufacturers need to make timely adjustments according to the situation and improve the production process in order to improve the quality of PVC discharge hose.

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