An Important Factor Affecting Die Casting Defects, ——How does Hot Spot Occur?

The casting hot spot refers to the isolated area where the metal liquid cools and solidifies at some local locations during solidification in the mold cavity.

The formation of hot spots usually depends mainly on the casting structure and wall thickness distribution (internal causes), and the local heat dissipation capacity of the mold (external causes).

The shrinkage channel of hot spot is blocked during solidification, and enough external metal compensation shrinkage cannot be obtained, so shrinkage cavity and porosity defects often occur, reducing the density of casting.Mechanical properties are significantly affected.