Injection Molding
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PA12 Insufficient Filling Systematic Troubleshooting
Fenómeno del problema
【Problem phenomenon】PA12 products had material shortage and short shots at the end, and single-item parameter adjustment was not effective
Análisis de la causa
The causes of insufficient filling are multiple: insufficient injection pressure, slow speed, low melt temperature, poor venting, too-small gate, and worn check ring can all lead to it; nylon process essentials require item-by-item systematic troubleshooting
Solución
Troubleshoot in the order of pressure-speed-temperature-venting-gate-check ring; add vent holes at unfilled locations; enlarge the gate or shorten the runner; check the check ring for wear and replace it
Conclusión clave
Troubleshoot short shots in the order of six elements, and check ring wear is the most easily overlooked; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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