The Effect of the Artificial Sand on the Gas Emission for Aluminum Casting

Abstract

The effect of artificial sand on the amount of core gas emission was examined. Mass loss by thermal decomposition of the binder was evaluated when resin-coated sand (RCS) with various amounts of artificial sand was exposed to high temperature. Compared to natural sand, the mass loss and temperature variation of artificial sand was reduced. It was confirmed that this is because the contact area between the two particles is reduced when the binder bridge is created between the foundry sands. Therefore, the surface morphology of the artificial sand has ragged surface, so that the heat conduction area is decreased.