Injection Molding
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POE '2079851475616104452 mold venting burnt
Problem Phenomenon
In POE '2079851475616104452, mold venting is insufficient; air in the cavity is compressed and heats up, causing local burnt
Cause Analysis
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 causes oxidative burnt
Solution
1) Increase vent groove area, depth 0.02-0.03mm, width 5-10mm; 2) Set vent grooves at the last-filled area of the melt; 3) Reduce injection speed to reduce air compression; 4) Multi-stage injection with slow advance for venting
Key Takeaway
Burnt is caused by insufficient venting and high-speed injection compressing air; increasing venting and reducing speed are key
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