Injection Molding
1 visualizações
EVOH Surface Tiger Stripes
Fenómeno do problema
EVOH injection molded product surfaces show tiger stripes, alternating light-dark bands 2-5mm wide
Análise das causas
Injection speed unstable, melt front fluctuating fast and slow; mold temperature too low <30°C, front rapidly cooling
Solução
1) Multi-stage injection slow-fast-slow to stabilize the front; 2) Increase mold temperature to 40-50°C; 3) Increase injection pressure for stable advancement
Conclusão principal
Tiger stripes are caused by unstable injection front; multi-stage injection and high mold temperature are key
Isto foi útil?
0 pessoas acharam isto útil
Obrigado pelo seu comentário!