Molds & Tooling
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ASA Jetting Snake Pattern
Problem Phenomenon
【Problem Phenomenon】Snake-shaped jetting patterns near the ASA gate, poor appearance
Cause Analysis
Melt passes through the small gate at high speed without touching the wall and jets into the cavity, the front folds into patterns; gate directly facing the empty cavity and excessive initial speed are the main causes; during on-site troubleshooting, verify item by item according to this mechanism, avoid blindly adjusting the machine based only on experience
Solution
Overlap or fan gate guides wall contact; gate arranged facing the core; reduce initial speed out of the gate; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
ASA jetting is cured by gate wall-contact arrangement; 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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