Molds & Tooling
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ASA Tiger Stripe Light-Dark Pattern
Problem Phenomenon
【Problem Phenomenon】Alternating light and dark tiger stripes on ASA product surface, periodically distributed
Cause Analysis
Unstable melt front advancement produces gloss light-dark differences; low melt temperature and mold temperature or filling speed fluctuation are the inducements; during on-site troubleshooting, verify item by item according to this mechanism, avoid blindly adjusting the machine based only on experience
Solution
Increase and stabilize melt temperature and mold temperature; injection speed curve smoothed; check plasticizing feed stability; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
ASA tiger stripes are front instability, temperature and speed dual stabilization; 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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