Extrusion & Post
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Haul-Off Speed Mismatch of Polypropylene 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 dimensional deviation of the product.
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 too large
(4) The extrusion speed fluctuates, making 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 caterpillar 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 precision
Conclusión clave
Haul-off speed mismatch needs to be solved by precisely adjusting the haul-off parameters and ensuring haul-off stability.
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