Extrusion & Post
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LDPE Thermocouple Calibration
Problembeschreibung
Two blown film lines with the same parameters produce different film thicknesses.
Ursachenanalyse
Temperature control deviation makes actual melt temperatures different, with different viscosity and output; 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.
Lösung
Regularly calibrate thermocouples; replace when deviation exceeds ±3℃; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability; Change only one variable at a time and record parameter changes to facilitate locating effective measures.
Wichtigste Erkenntnis
Multi-line consistency relies on unified temperature control metrology; 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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