Molds & Tooling
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ASA Short Shot Insufficient Filling
Problem Phenomenon
【Problem Phenomenon】ASA thin-walled long-flow products lack material at the end, raising pressure and temperature gives limited improvement
Cause Analysis
Melt front freezing, poor venting, too small gate, large runner pressure loss all cause short shot; ASA flow length ratio is limited under medium viscosity; during on-site troubleshooting, verify item by item according to this mechanism, avoid blindly adjusting the machine based only on experience
Solution
Raise melt temperature and mold temperature to window upper limit; strengthen end venting; enlarge gate and runner; excessive flow length change to multiple gates; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
ASA short shot troubleshoot in the order of temperature, venting, gate, flow length; 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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