Molds & Tooling
8 visualizaciones
EAA internal shrinkage voids
Fenómeno del problema
Shrinkage voids of 0.5-2mm diameter in the center of thick-wall EAA products
Análisis de la causa
After cooling of thick-wall areas the interior shrinks but the surface has solidified, unable to feed material; holding time insufficient, gate freezes too early
Solución
1) Extend holding time until the gate is completely frozen; 2) Increase gate size to delay freezing; 3) Product design to reduce wall thickness difference
Conclusión clave
Shrinkage voids are caused by thick-wall shrinkage and insufficient holding; extending holding is the key
¿Le ha resultado útil?
0 personas encontraron esto útil
¡Gracias por sus comentarios!