Extrusion & Post
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Haul-Off Speed Mismatch of High-Density Polyethylene Extruded Products
Fenómeno del problema
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 causes product dimensional deviation.
Análisis de la causa
（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 excessive
（4）Extrusion speed fluctuations make the haul-off difficult to synchronize
（5）The haul-off control system responds slowly
Solución
（1）Adjust the haul-off speed to match the extrusion speed, and determine the synchronous speed by the weighing method
（2）Check the haul-off tracks or rollers to ensure no slipping, and replace the clamping pads when 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
Conclusión clave
Haul-off speed mismatch needs to be solved by precisely adjusting the haul-off parameters and ensuring stable haul-off.
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