Processing Machinery
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PC Batch-to-Batch Color Difference
Problem Phenomenon
[Problem Phenomenon] Batch-to-batch color difference of PC colored parts
Cause Analysis
Heat history differences, color masterbatch dispersion and regrind fluctuations; transparent base color is more sensitive; when troubleshooting on site, verify each item according to this mechanism one by one, and avoid blindly adjusting the machine based on experience alone; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solution
Lock the temperature and residence; precise color masterbatch metering; regrind management; after adjustment, take samples continuously to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes, so as to locate effective measures
Key Takeaway
PC color difference: control the heat history, color masterbatch and regrind; 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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