Production & Quality
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Cooling system efficiency decline of low density polyethylene extruder
Problem Phenomenon
Insufficient product cooling; temperature still high after exiting the cooling water tank, affecting sizing effect and subsequent cutting.
Cooling efficiency decline causes reduced production speed or product deformation.
Cause Analysis
(1) Insufficient cooling water flow or low water pressure
(2) Cooling water temperature too high
(3) Cooling water channel scaling and blockage
(4) Insufficient cooling water tank length
(5) Large product wall thickness, slow heat dissipation
Solution
(1) Check cooling water pump and pipes, ensure sufficient flow and water pressure
(2) Add cooling water chilling device (chiller), control water temperature 15-25°C
(3) Regularly clean cooling water channels and cooling water tank, remove scale
(4) Increase cooling water tank length or add cooling stations
(5) Appropriately reduce extrusion speed for thick-wall products, extend cooling time
Key Takeaway
Cooling efficiency decline is caused by insufficient water volume or excessive water temperature; the cooling system needs improvement and water temperature control.
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