Processing Machinery
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Linear low-density polyethylene PE raw material has a wide temperature window, making process parameter optimization difficult (variant: strengthened measures)
Fenómeno do problema
PE materials have a wide processing temperature range (190-250°C), and there is a lack of basis for how to select the optimal temperature in actual operation.
Improper temperature selection harms energy consumption, product quality and production efficiency.
Especially, additional attention is needed on top of the original basis; this problem is more prominent and requires focused attention.
Análise das causas
(1) Different PE grades have different optimal processing temperatures
(2) Temperature setting lacks a systematic method
(3) Operators set temperatures based on experience
(4) Temperature is not optimized according to product characteristics and quality requirements
(5) The matching relationship between temperature and screw speed is unclear
(6) On top of the original basis, additional attention is needed as process parameter fluctuations or equipment condition changes aggravate this problem
Solução
(1) Establish a processing temperature database for each PE grade
(2) Optimize the temperature of each section through design of experiments (DOE)
(3) Appropriately increase temperature to improve fluidity for thin-walled products
(4) Appropriately decrease temperature to reduce shrinkage for thick-walled products
(5) Standardize temperature adjustment records and establish optimal process parameter archives
(6) And strengthen process monitoring; on top of the original basis, additional attention is needed to pay special attention to parameter stability
Conclusão principal
PE temperature window optimization needs to be advanced from two aspects: systematic experiments and experience accumulation.
In different production scenarios, targeted preventive measures need to be taken.
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