Production & Quality
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Cooling system efficiency decline of linear low-density polyethylene extruder
Problem Phenomenon
The product is insufficiently cooled and its temperature is still high after leaving the cooling water tank, affecting the sizing effect and subsequent cutting.
Cooling efficiency decline reduces production speed or causes product deformation.
Cause Analysis
(1) Cooling water flow is insufficient or water pressure is low
(2) Cooling water temperature is too high
(3) Cooling water passages are scaled and clogged
(4) The cooling water tank is not long enough
(5) The product has thick walls and dissipates heat slowly
Solution
(1) Check the cooling water pump and pipes to ensure sufficient flow and pressure
(2) Add a cooling water cooling device (chiller) and control water temperature at 15-25°C
(3) Regularly clean cooling water passages and the cooling water tank to remove scale
(4) Increase the cooling water tank length or add cooling stations
(5) For thick-walled products, appropriately reduce extrusion speed to extend cooling time
Key Takeaway
Cooling efficiency decline is caused by insufficient water volume or excessive water temperature; the cooling system needs to be improved and water temperature controlled.
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