Processing Machinery
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Wide temperature window of random copolymer polypropylene pipe special material PE raw material causing difficulty in process parameter optimization (Variant: strengthened measures)
Problem Phenomenon
PE materials have a wide processing temperature range (200-220°C), and there is a lack of basis for how to select the optimal temperature in actual operation.
Improper temperature selection damages energy consumption, product quality, and production efficiency.
In particular, extra attention is needed on the original basis, this problem is more prominent and needs key attention.
Cause Analysis
（1）The optimal processing temperature of different PE grades is different
（2）The temperature setting lacks a systematic method
（3）The operator sets the temperature based on experience
（4）The temperature is not optimized according to the product characteristics and quality requirements
（5）The matching relationship between temperature and screw speed is not clear
（6）On the original basis, extra attention is needed: process parameter fluctuations or equipment status changes have aggravated this problem
Solution
（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 the temperature for thin-walled products to improve flowability
（4）Appropriately lower the temperature for thick-walled products to reduce shrinkage
（5）Standardize the temperature adjustment records and establish the best process parameter archives
（6）And strengthen process monitoring; on the original basis, extra attention is needed, with special attention to parameter stability
Key Takeaway
PE temperature window optimization needs to be promoted from two aspects: systematic experiments and experience accumulation.
In different production scenarios, targeted preventive measures need to be taken.
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