Injection Molding
3 visualizaciones
POE '2079851475616104452 flow marks
Fenómeno del problema
POE injection molded product surface shows radial flow marks centered on the gate
Análisis de la causa
Injection speed too fast causes melt front instability; mold temperature too low <30°C, front rapidly cools forming marks
Solución
1) Adopt multi-stage injection speed slow-fast-slow to control front stability; 2) Raise mold temperature to 40-50°C to delay front cooling; 3) Stabilize injection pressure to avoid fluctuation; 4) Enlarge gate area to reduce sudden pressure change at the gate
Conclusión clave
Flow marks are caused by unstable injection front and rapid cooling; multi-stage injection and high mold temperature are key
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