Extrusion & Post
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Heat-resistant polyethylene pipe ovality exceeding standard (Variant: strengthened measures)
Fenómeno do problema
The pipe cross-section is not round and the ovality exceeds the tolerance.
Excessive ovality affects pipe connection and installation, and may cause leakage in socket connections and mechanical connections.
Especially on the original basis, additional attention is needed, and this problem is more prominent and requires key attention.
Análise das causas
(1) Cooling uneven, pipe shrinkage inconsistent in all directions
(2) Sizing sleeve worn or improperly installed
(3) Haul-off clamping force too large causes pipe deformation
(4) Improper pipe stacking causes deformation
(5) Cooling water temperature too high causes pipe softening and deformation
(6) On the original basis, additional attention is needed: process parameter fluctuations or equipment state changes aggravate this problem
Solução
(1) Check the cooling system to ensure uniform cooling of the pipe in all directions
(2) Check the sizing sleeve, replace if worn, ensure concentric installation
(3) Adjust haul-off clamping force to avoid excessive force
(4) Use special storage racks for pipes to avoid stacking deformation
(5) Control cooling water temperature at 15-25°C
(6) And strengthen process monitoring; on the original basis, additional attention is needed, paying special attention to parameter stability
Conclusão principal
Excessive ovality is caused by uneven cooling or external force deformation, and needs to be solved from cooling uniformity and pipe storage.
Targeted preventive measures need to be taken in different production scenarios.
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