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  4. PVC pipe production problems and solutio...

PVC pipe production problems and solutions

PVC pipe production problems and solutions

There are always various problems in the process of PVC pipe production. Only by solving these problems can high-quality PVC pipes be produced. To share with you some PVC pipe production problems and solutions.

pvc tube

1. The outer surface of the plastic pipe is rough: adjust the process temperature: reduce the cooling water temperature, the optimal cooling water temperature of the PE pipe is 20 ~ 25 ℃; check the waterway for blockage or insufficient water pressure; check whether the heating ring of the barrel, machine head, etc. There is damage; adjust the inlet water flow of the sizing sleeve; consult the raw material supplier, the raw material parameters of this batch; check the mold core temperature, if it is higher than the temperature of the die section, lower the core temperature; clean the mold;

2. Groove marks appear on the outer surface of the plastic pipe: adjust the outlet pressure of the sizing sleeve, and the water output requirement is balanced; adjust the nozzle angle in the vacuum sizing box to make the pipe cool evenly; check the hardware such as die, sizing sleeve, cutting machine, etc. Objects, burrs, etc .;

3. Groove marks appear on the inner surface: check whether the inner tube is filled with water. If the water enters, pinch the tube blank of the outlet mold tightly to make the inner cavity closed; reduce the internal temperature of the mold; clean and polish the mold;

4. There is a jitter ring inside the pipe: adjust the outlet of the sizing sleeve to make the water even; adjust the vacuum degree of the second chamber to make the vacuum degree of the rear chamber slightly higher than the vacuum degree of the front chamber; check whether the vacuum seal is too tight; check the pvc pipe production line Whether there is jitter in the traction machine; check whether the main machine discharges evenly;

5. No vacuum: check whether the water inlet of the vacuum pump is blocked, if it is blocked, use a needle to dredge; check whether the vacuum pump works normally; check whether the vacuum pipeline is leaking; check whether the small hole in the middle of the mandrel compression screw is blocked, such as blocking Dredge with thin iron wire;

6. Outer tolerance of the outer diameter of the pipe: adjust the size of the vacuum degree to change the size of the outer circle; adjust the traction speed to change the size of the outer circle; modify the size of the inner hole of the sizing sleeve;

7. Out-of-standard pipe quality: adjust the nozzle angle in the vacuum setting machine and spray box to make the pipe cool evenly; check the water level height and water pressure gauge pressure in the vacuum setting machine and spray box to make the spray volume large and powerful; Check the water temperature of the vacuum setting machine and spray box. If it is> 35 ℃, you need to configure a chilled water system or add a spray cooling box; check the waterway and clean the filter; adjust the process; check and correct the hole size of the sizing sleeve; adjust Pipe guiding clamping device to correct the ellipticity of the pipe;

If you want to know more about it please do not hesitate to contact me. WhatsApp:+86-15966835076.


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    • PE LARGE CALIBER HOLLOW WALL WINDING PIPE PRODUCTION LINE
    • PVC PE POROUS PIPE PRODUCTION LINE
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    • ALUMINUM-PLASTIC COMPOSITE PIPE PRODUCTION LINE
    • PEX/PERT HEAT-RESISTANT FLOOR HEATING PIPE MACHINE
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    • PVC TPU MECIAL TUBE EXTRUSION MACHINE
    • PE AERATION TUBE MACHINE
    • METAL PRESTRESSED CORRUGATED PIPE MACHINE
    • HDPE THREADING PIPE MACHINE
    • HDPE/PP/PVC DOUBLE WALL CORRUGATED PIPE MACHINE
    • PU TUBE MACHINE
    • PP 3LAYER CO EXTRUSION SILENT PIPE MACHINE
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  • BIODEGRADABLE PLASTICS MACHINERY
  • PLASTIC EXTRUSION AUXILIARY MACHINE
  • PLASTIC EXTRUDER
  • LAMINATING AND HOT STAMPING MACHINE
  • BOARD PROFILE UV PAINTING MACHINE
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