Processing Machinery
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Random copolymer polypropylene pipe special material (Nordic standard） extruder cooling system efficiency decline（Variant: Strengthened Measures）
Problem Phenomenon
The product is insufficiently cooled, and the temperature is still high after leaving the cooling water tank, affecting the sizing effect and subsequent cutting.
The decline in cooling efficiency causes production speed to decrease or the product to deform.In particular, extra attention is needed on top of the original basis, this problem is more prominent and requires key attention.
Cause Analysis
（1）Cooling water flow insufficient or water pressure low\
（2）Cooling water temperature too high\
（3）Cooling water channels scaled and clogged\
（4）Cooling water tank length insufficient\
（5）Product wall thickness large, heat dissipation slow\
（6）On top of the original basis, extra attention is needed: process parameter fluctuations or equipment status changes aggravate this problem
Solution
（1）Check the cooling water pump and pipes, ensure sufficient flow and water pressure\
（2）Add a cooling water chilling device (water chiller), control water temperature at 15-25°C\
（3）Regularly clean the cooling water channels and cooling water tank, remove scale\
（4）Increase the cooling water tank length or add cooling stations\
（5）For thick-wall products, appropriately reduce extrusion speed and extend cooling time\
（6）And strengthen process monitoring; on top of the original basis, extra attention is needed, paying special attention to parameter stability
Key Takeaway
The decline in cooling efficiency is caused by insufficient water volume or excessive water temperature, requiring improvement of the cooling system and control of water temperature.Targeted preventive measures need to be taken in different production scenarios.
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