Injection Molding
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Severe EEA injection flash
Problem Phenomenon
EEA injection molded products with parting line flash 0.05-0.1mm, width >2mm, requiring secondary trimming
Cause Analysis
Injection pressure too high >80MPa, melt overflowing from the parting line; insufficient clamping force; mold parting line fitting gap >0.02mm
Solution
1) Reduce injection pressure to 60-70MPa; 2) Increase clamping force or use a larger tonnage '2079851475616104452 machine; 3) Mold fitting gap <0.02mm; 4) Increase melt viscosity to reduce mold seepage tendency
Key Takeaway
Flash is caused by high-pressure injection and mold gap; reducing pressure and improving mold fitting is the key
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