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Troubleshooting China-manufactured PVC/SPC flooring extrusion lines involves addressing common defects like surface imperfections, inconsistent thickness, and warping, usually caused by temperature instability, screw wear, or improper calibration. Key solutions include
cleaning dies to remove impurities, optimizing vacuum pressure, adjusting roll temperatures, and cleaning die heads
.
Common Issues and Solutions
-
Uneven Surface/Grooves (SPC Floors):
- Causes: Improper die/mold settings, inconsistent temperature, or impurities.
- Solutions: Adjust die and mold alignment, calibrate the cooling water temperature (lower it), and ensure vacuum negative pressure is consistent.
-
Warping/Bending:
- Causes: Improper cooling distribution, uneven material flow, or excessive internal stress.
- Solutions: Balance cooling water pressure, increase cooling time, and check the calibration sleeve for blockages.
-
Thickness Variations:
- Causes: Uneven die gap, unstable screw speed, or material inconsistencies.
- Solutions: Adjust the die gap, check the screw/barrel for wear, and stabilize the feeding speed.
-
Rough/Dull Surface & Black Spots:
- Causes: Improper melt temperature (too low), material degradation, or contaminants.
- Solutions: Increase melt temperature, check for cold spots in the die, and ensure raw material is clean.
-
Motor Overload/Torque Alarm:
- Causes: Low processing temperature, excessive feeding, or foreign materials.
- Solutions: Increase temperature, reduce screw speed, and check for screw obstruction.
Preventive Maintenance
- Regularly clean the die head, screw, and barrel, especially when running colored materials.
- Check the heating elements and temperature sensors for accurate readings.
- Monitor hydraulic and vacuum systems for leaks.
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Common Plastic Extrusion Problems and How to Solve
Boyu Extruder
https://www.boyuextruder.com
› Blog
Boyu Extruder
https://www.boyuextruder.com
› Blog
Dec 9, 2024
—
Identifying Common Plastic Extrusion Problems ·
Screw Cracks
· Film Blocking · Die Build-up · Surface Defects · Poor Extrusion Output.
Read more
Common Problems and Solutions of PE Pipe Extrusion Line
sharcpm.com
https://www.sharcpm.com
› Media › News
sharcpm.com
https://www.sharcpm.com
› Media › News
Mar 27, 2025
—
Problem
: A rough or uneven outer surface on the PE pipe can negatively impact its aesthetic and functional qualities, leading to increased ...
Read more
How to troubleshoot a Flooring Extrusion Line when it ...
Shanghai Ruichang Machinery Co.,Ltd
https://www.parallel-extrusion.com
› Blog
Shanghai Ruichang Machinery Co.,Ltd
https://www.parallel-extrusion.com
› Blog
Sep 4, 2025
—
Mechanical
issues
are another common reason why a
Flooring Extrusion Line
might stop working. Start by checking the belts and chains. Over time, ...
Read more
Fault Record of SPC Flooring Extrusion Line In The USA
Starsplas
https://www.starsplas.com
› fault-record-of-spc-floorin...
Starsplas
https://www.starsplas.com
› fault-record-of-spc-floorin...
Sep 27, 2019
—
1. Assuming that the internal pressure of screw is too high, it may be caused by the failure of shutdown material to extrude into the die. 2.
Read more
Common Faults Analysis of Plastic Extruders
Qiangsheng Plastic Machinery co.,Ltd
https://www.qiangshengplas.com
› news › common-fault...
Qiangsheng Plastic Machinery co.,Ltd
https://www.qiangshengplas.com
› news › common-fault...
Jun 4, 2024
—
Tackle common plastic extruder faults with ease. Delve into a detailed analysis of causes, symptoms, and
effective troubleshooting methods
...
Common Problems and Solutions of PE Pipe Extrusion Line
JWELL Extrusion Machinery Co., Ltd.
https://www.jwellextrusions.com
› Resources › Blog
JWELL Extrusion Machinery Co., Ltd.
https://www.jwellextrusions.com
› Resources › Blog
The outer surface of the pipe extrusion line is often rough
, the inner vibrating ring appears, the wall thickness is uneven, and the roundness is not enough.
Read more
pvcextruder,spcextruder,wpcextruder,extruder,extrusion, ...
wuxi jks machinery manufacturing co.,ltd
https://www.extrudetec.com
› html_news › 19-How-to-...
wuxi jks machinery manufacturing co.,ltd
https://www.extrudetec.com
› html_news › 19-How-to-...
Aesthetic
problems
are caused by black spots, drag marks, small holes and dent marks on the surface of the plastic sheet
extrusion line
. Aesthetic defects can ...
Read more
Flooring Extrusion Line Troubleshooting
skywinextruder.com
https://www.skywinextruder.com
› blogtag › flooring-e...
skywinextruder.com
https://www.skywinextruder.com
› blogtag › flooring-e...
Nov 15, 2025
—
1.
Unstable Extrusion Output
Symptoms: Fluctuating extrusion pressure Inconsistent product thickness Visible waves or uneven surfaces Possible ...
Read more
Troubleshooting the Sheet Extrusion Line
YouTube · PaulsonTraining
13.7K+ views · 12 years ago
YouTube · PaulsonTraining
13.7K+ views · 12 years ago
The problem may be moisture, air entrapment contamination, too cold, a melt temperature or poor contact with the chill rolls.
Brief Analysis Of Common Problems In SPC Floor Production
kalshine.com
https://www.kalshine.com
› News
kalshine.com
https://www.kalshine.com
› News
Nov 30, 2018
—
1.
The dimension of the product is unstable
, the finalizing die is not satisfied with the die, and the wall thickness is not uniform.
Read more