Molds & Tooling
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ASA Gate Mark Whitening
Problem Phenomenon
【Problem Phenomenon】Obvious whitening marks after gate cutting on ASA products
Cause Analysis
High shear stress concentration in the gate area, cut section stress whitening; too large gate or position on appearance surface aggravates; during on-site troubleshooting, verify item by item according to this mechanism, avoid blindly adjusting the machine based only on experience
Solution
Gate on non-appearance surface or submarine type; sharp tool trimming; slight hot air re-warming after trimming to reduce white marks; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
ASA gate marks rely on position design plus sharp trimming; 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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