Processing Machinery
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LDPE Barrel Temperature
Problem Phenomenon
LDPE plasticizes unevenly and melt temperature fluctuates.
Cause Analysis
The barrel temperature gradient is unreasonable, with temperature control deviation in each zone; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; This mechanism has been repeatedly verified by industry literature and should be confirmed first during troubleshooting.
Solution
Barrel gradient: rear zone 150℃, middle zone 180℃, front zone 200℃; calibrate the temperature controller; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
A gentle LDPE temperature gradient ensures uniform plasticizing; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; Incorporate this case into the defect archive as a troubleshooting reference for similar future problems.
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