Processing Machinery
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PVC Lead Salt Replacement
Problem Phenomenon
Processing fluctuation after switching from lead salt stabilizer system to calcium-zinc
Cause Analysis
Calcium-zinc stabilizer has different heat stabilization efficiency from lead salt, changing the process window; 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
Re-calibrate the process window when switching; adjust the lubrication system synchronously; verify with stability tests; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
Stabilizer switching requires systematic re-verification; 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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