Processing Machinery
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PCABS Color Difference Between Batches
Problem Phenomenon
[Problem Phenomenon] PC/ABS colored parts have color difference between batches
Cause Analysis
Thermal history differences, color masterbatch dispersion, and regrind ratio fluctuations; during on-site troubleshooting, verify item by item according to this mechanism, and 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
Lock temperature and residence time; precise color masterbatch metering; fixed regrind; 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
PC/ABS color difference is controlled by thermal history, color masterbatch, and regrind; 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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