Injection Molding
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Material shortage of PP thin-wall parts
Fenómeno del problema
The small parts and corners of the finished product cannot be fully formed, and the local wall thickness is insufficient.
Análisis de la causa
The mold machining is not in place or venting is poor, plus insufficient injection dose or pressure, so the thin-wall area is blocked from filling, forming material shortage.; during on-site investigation, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solución
①Correct the mold at the shortage area and improve venting; ②increase the injection dose and pressure; ③enlarge or add gates; ④evaluate locally increasing the wall thickness.; after adjustment, continuously sample and verify the effect, and resume mass production after confirming stability
Conclusión clave
Thin-wall material shortage requires checking both the mold and the process; poor venting is an easily overlooked cause of material shortage under high-speed filling.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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