Processing Machinery
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PC material batch switching
Problem Phenomenon
【Problem Phenomenon】PC process window drifts after changing batch and supplier
Cause Analysis
Different batches of molecular weight and melt index differences affect flow; changing supplier grade systems requires recalibration；During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
Solution
Quick melt index test for batch change; re-trial mold for supplier change; incoming inspection linked with process；After adjustment, take continuous samples 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
Key Takeaway
PC material change does quick test first, supplier change recalibrates；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence；Include this case in the defect archive as a reference for troubleshooting similar problems in the future
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