Injection Molding
2 visualizaciones
Ejector whitening on EVA injection molded products
Fenómeno del problema
White marks (ejector whitening) appear at ejector pin positions on EVA injection molded products, affecting appearance
Análisis de la causa
Ejector pin force too large causing local compression deformation and whitening; insufficient cooling time with product ejected before full solidification; ejector pin area too small with stress concentration
Solución
1) Extend cooling time to eject after full solidification; 2) Increase ejector pin area using ejector plate instead of small pins; 3) Reduce ejection speed to reduce impact force; 4) Increase demolding draft to reduce ejection force
Conclusión clave
Ejector whitening is caused by excessive ejection force and insufficient cooling; increasing ejector pin area and extending cooling time are key
¿Le ha resultado útil?
0 personas encontraron esto útil
¡Gracias por sus comentarios!