Extrusion & Post
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Random copolymer polypropylene pipe special material (Nordic standard） extruded products haul-off speed mismatch（Variant: Mass Production Scenario）
Problembeschreibung
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.In particular, during continuous mass production, this problem is more prominent and requires key attention.
Ursachenanalyse
（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\
（6）In continuous mass production, process parameter fluctuations or equipment status changes aggravate this problem
Lösung
（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\
（6）And establish standardized work instructions, paying special attention to parameter stability in continuous mass production
Wichtigste Erkenntnis
Haul-off speed mismatch needs to be solved by precisely adjusting haul-off parameters and ensuring stable hauling.Targeted preventive measures need to be taken in different production scenarios.
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