Processing Machinery
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PVC Small-Batch Management
Problem Phenomenon
Laboratory PVC samples made according to the mass-production process gave unstable results
Cause Analysis
Shear heat distribution of lab equipment differs from that of large machines, so the process cannot be copied directly; 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
Establish the process window independently for lab trials; temperature is based on actual measurement; record equipment differences; 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
PVC process transfer must consider equipment differences; 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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