Processing Machinery
2 views
Longitudinal stripes or scratches appear on the outer surface of extruded pipe
Problem Phenomenon
Longitudinal stripes or scratches appear on the outer surface of extruded pipe, affecting appearance quality
Cause Analysis
Damage or carbon deposits on the die inner surface
Unstable melt temperature, viscosity fluctuation
Uneven screw plasticization
Broken screen pack, impurities pass through
Raw material contains impurity particles
Solution
Clean and polish the die inner surface
Stabilize extrusion temperature
Ensure uniform screw plasticization
Replace the screen pack
Strengthen raw material inspection
Key Takeaway
Pipe surface stripes need to be addressed from die cleaning and temperature stability
Was this helpful?
0 people found this helpful
Thank you for your feedback!