Processing Machinery
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PVC Wire Discoloration
Problem Phenomenon
PVC wire insulation discolors and embrittles after thermal aging
Cause Analysis
Long-term thermal aging exhausts the stabilizer, and insulation performance decreases; during on-site troubleshooting, verify item by item according to this mechanism to avoid 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
Select insulation material matching the temperature resistance grade; verify according to thermal aging standards; service life management; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Key Takeaway
Wire insulation is selected and verified by temperature grade; 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 in the future
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