Injection Molding
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Flash and overflow of PP thin-wall parts
Problembeschreibung
Under high-speed and high-pressure filling, flash appears at the parting line, and the cleaning workload is large.
Ursachenanalyse
Thin-wall '2079851475616104452 requires very high injection pressure; when the clamping force is insufficient or the platen deforms, the high-pressure melt forces open the parting line; mold wear also aggravates flash.; during on-site investigation, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Lösung
①Check and increase the clamping force; ②overhaul the platen parallelism and parting line fit; ③optimize the injection speed curve to prevent overfilling; ④repair worn parts.; after adjustment, continuously sample and verify the effect, and resume mass production after confirming stability
Wichtigste Erkenntnis
The thin-wall high-pressure process has high requirements for the clamping capacity of the equipment; flash treatment requires the coordination of equipment, mold, and process.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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