Processing Machinery
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PVC Thermocouple Calibration
Problem Phenomenon
Multiple PVC machines producing with same parameters, degradation degree differs
Cause Analysis
Thermocouple deviation makes actual temperatures differ, PVC narrow window extremely sensitive to deviation; during on-site troubleshooting, verify item by item according to this mechanism, avoid blindly adjusting the machine based solely on experience.
Solution
Thermocouples regularly calibrated; replace when deviation exceeds ±2℃; process parameters unified by actual measured temperature; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PVC temperature control metering managed at ±2℃ precision; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems later
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