Injection Molding
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MP '2079851475616104452 mold venting burning
Problembeschreibung
MP injection mold venting insufficient, air in the cavity compressed and heated causing local burning
Ursachenanalyse
mold vent groove area insufficient or position improper; injection speed too fast, air has no time to escape; air compressed to high temperature >200°C causing oxidative burning
Lösung
1) increase vent groove area, depth 0.02-0.03mm, width 5-10mm; 2) locate vent grooves at the last-filled region of the melt; 3) reduce injection speed to reduce air compression; 4) multi-stage injection with slow advance for venting
Wichtigste Erkenntnis
burning is caused by insufficient venting and high-speed injection compressing air; increasing venting and reducing speed are key
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