Analysis of Core Stress During Casting

This article is focused on analysis of stress inside the piston casting molding core, which is the result of interaction between the core and the liquid. The mold and core are both metal and their surfaces are nitrated. The mold is water cooled. The core cooling is ensured by drilled hole on the bottom side, into which is injected water. As a result of uneven stress in the core, cracks begin to appear which have a negative influence on the longevity (to 15% of predicted duration).