Injection Molding
1 visualizações
MP '2079851475616104452 sink marks
Fenómeno do problema
MP injection molded products have surface depressions 0.2-0.5mm in thick-wall regions, sink marks
Análise das causas
holding pressure insufficient or holding time short; gate freezes prematurely, holding cannot be transmitted; large wall thickness difference, thick wall cannot be fed after the thin wall freezes
Solução
1) raise holding pressure 70-90MPa; 2) extend holding to gate freeze +2s; 3) product design to reduce wall thickness difference with gradual transition; 4) add supplementary gates in thick-wall regions
Conclusão principal
sink marks are caused by insufficient holding and wall thickness difference; high-pressure holding and multiple gates are the core countermeasures
Isto foi útil?
0 pessoas acharam isto útil
Obrigado pelo seu comentário!