Molding Sand: Constituents, Types and Properties
Feb 04, 2016· The used sand is cleaned and reactivated by the addition of water and special additives. This is known as system sand. Since the whole mold is made of this system sand, the properties such as strength, permeability and refractoriness of the molding sand must be higher than those of backing sand. 3. Properties of Molding sand. The basic ...