Extrusion & Post
9 views
Random copolymer polypropylene pipe special material (Nordic standard） extruded products haul-off speed mismatch
Problem Phenomenon
The extrudate is uneven in thickness; when hauling is too fast the product becomes thinner and narrower, and when hauling is too slow the product becomes thicker and wider.
Mismatch between haul-off speed and extrusion speed causes product dimensional deviation.
Cause Analysis
（1）The haul-off speed setting does not match the extrusion speed\
（2）The haul-off machine slips, the actual haul-off speed is unstable\
（3）The haul-off clamping force is insufficient or too large\
（4）Extrusion speed fluctuations make hauling difficult to synchronize\
（5）The haul-off control system responds slowly
Solution
（1）Adjust the haul-off speed to match the extrusion speed, determine the synchronous speed by the weighing method\
（2）Check the haul-off tracks or rollers, ensure no slipping, replace the clamping pads if necessary\
（3）Adjust the haul-off clamping force, ensure uniform clamping without damaging the product\
（4）Stabilize the extrusion speed, reduce fluctuation\
（5）Upgrade the haul-off control system, improve response speed and accuracy
Key Takeaway
Haul-off speed mismatch needs to be solved by precisely adjusting haul-off parameters and ensuring stable hauling.
Was this helpful?
0 people found this helpful
Thank you for your feedback!