Frozen Layer Ratio Result
Frozen layer ratio is the ratio of the thickness of frozen layers for the cavity and the core sides to the part thickness. Frozen Layer Ratio result shows the volume percentage of the frozen plastic with respect to part thickness at the end of filling. The value gradually becomes 100 as the part solidifies.
A frozen layer is formed near the cavity surface because of solidification, which is caused by cooling. An increase in the thickness of frozen plastic reduces the cross-section along the flow path and thus increases the flow resistance and sprue pressure.
A thicker frozen layer reduces the chance of forming sink marks but increases the chance of forming voids because the solidified plastic has a higher resistance to deformation. The frozen layer ratio also affects the residual stress and the flow-induced orientation.