Extrusion & Post
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LLDPE barrel temperature
Problem Phenomenon
LLDPE extrusion melt temperature fluctuates greatly.
Cause Analysis
The barrel temperature gradient is unreasonable, and each zone's temperature control deviates; During on-site troubleshooting, verify item by item according to this mechanism, avoiding blindly adjusting the machine based only on experience; This mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting.
Solution
Barrel gradient per rear zone 170℃, middle zone 195℃, front zone 210℃; temperature control calibration; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
The LLDPE temperature gradient ensures uniform plasticization; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future.
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