HDPE Pipe Production Problems & Solutions
Time:2020-01-18
HDPE Pipe Production Problems & Solutions
For HDPE pipe producers, especially in the large-diameter HDPE pipe production process(https://youtu.be/nCpoqhMozws), there must be some HDPE pipe production headaches. In this passage, BENK Machinery will introduce 7 most common problems and corresponding solutions for producers’ reference.
HDPE pipe production problems and solutions table
| Common problems | Causes | Solutions |
1. The outer surface is shiny and transparent (commonly known as eye-clear) |
1. die head temperature too high | 1. lower die head temperature |
| 2. cooling water not enough or uneven | 2. increase cooling water or clean sizing sleeve | |
2. The deep corrugation on the outer surface of the pipe |
The sizing die is not centered. | Keep the sizing box and the die on the same axis |
3. The inner surface is rough |
1. The raw materials are wet | 1. The raw materials are dried, or pretreated |
| 2. The core mold temperature is low | 2. Increase the temperature or extend the holding time | |
| 3. The excessive gap between the die and the core mold | 3. Change core mold | |
| 4. The die shaping section is too short | 4. Change the die with a longer shaping section | |
4. The inner wall of the tube is corrugated |
1. The output of the extruder changes and the feeding is unstable | 1. Reduce the temperature in the screw feeding area |
| 2. The tractor is slipping | 2. Adjust the traction air pressure | |
| 3. Uneven cooling of pipes | 3. Regulate waterway | |
5. Pits on the inner wall of the tube |
1. raw material water content high | 1. Preheat and dry raw material |
| 2. Poor dispersibility of fillers, unplasticized, with impurities | 2. change or clean raw materials adjust the temperature | |
6. Uneven pipe wall thickness |
1. Misalignment of die | 1. Concentricity adjustment of die |
| 2. Uneven die temperature | 2. Adjust temperature | |
| 3. Traction machine, sizing sleeve, die are not aligned | 3. Keep on the same axis | |
| 4. The distance between the sizing sleeve and the die is too far | 4. decrease the distance | |
7. The roundness of the pipe is not good, and it is bent |
1. The center position of the die and core die is not correct | 1. Adjust the concentricity |
| 2. The uneven temperature around the machine head | 2. Adjust the temperature | |
| 3. The cooling water is too close to the die | 3. Adjust the cooling water position | |
| 4. Excessive spraying of cooling water | 4. Adjust nozzle angle | |
| 5. Cooling water spray is too small | 5. Clean up the waterway | |
| 6. The water level is too high | 6. Drain | |
| 7. Too much pressure on the tractor | 7. Adjust air pressure |
Welcome to contact us for solutions to HDPE pipe production problems. And welcome to consult our HDPE pipe production line( https://www.benkextruder.com/hdpe-pe-pipe-making-machine/ ).