Processing Machinery
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ABS material batch switching
Problem Phenomenon
[Problem phenomenon] Process window drift after switching ABS batches or suppliers
Cause Analysis
Different batches have differences in melt index and rubber content affecting flow and impact; switching suppliers involves different grade systems requiring recalibration; during on-site troubleshooting, verify item by item according to this mechanism, avoiding blind machine adjustment based solely on experience
Solution
Quick melt index check for batch change; re-trial mold for supplier change; incoming inspection linked with process; after adjustment, continuously sample 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
ABS material change first quick check, supplier change recalibration; 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 subsequent similar problems
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