Extrusion & Post
6 Aufrufe
Haul-off speed mismatch of general-purpose polyethylene extruded products
Problembeschreibung
The extrudate is uneven in thickness; when the haul-off is too fast, the product becomes thinner and narrower, and when the haul-off is too slow, the product becomes thicker and wider.
The mismatch between the haul-off speed and the extrusion speed leads to product dimensional deviation.
Ursachenanalyse
（1）The haul-off speed setting does not match the extrusion speed
（2）The haul-off machine slips, and the actual haul-off speed is unstable
（3）The haul-off clamping force is insufficient or too large
（4）The extrusion speed fluctuates, making the haul-off difficult to synchronize
（5）The haul-off control system responds slowly
Lösung
（1）Adjust the haul-off speed to match the extrusion speed, and determine the synchronization speed by the weighing method
（2）Check the haul-off track or roller to ensure no slipping, and replace the clamping pad if necessary
（3）Adjust the haul-off clamping force to ensure uniform clamping without damaging the product
（4）Stabilize the extrusion speed and reduce fluctuations
（5）Upgrade the haul-off control system to improve response speed and accuracy
Wichtigste Erkenntnis
Haul-off speed mismatch needs to be solved by accurately adjusting the haul-off parameters and ensuring stable haul-off.
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