Molds & Tooling
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PC/ABS ejector whitening
Problem Phenomenon
Whitening at ejection positions.
Cause Analysis
Ejection force concentrated, stress whitening; insufficient cooling, large clinging force.; during on-site troubleshooting, verify item by item according to this mechanism, 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
①Increase ejection area; ②extend cooling; ③balance ejection; ④ensure demolding draft.; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Ejector whitening is a signal of local stress overload.; 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 later
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