Sand preparation is the essential key factor towards getting a consistently hard mold with smooth surface finish, ensuring that the permeability allows the mold to breathe. It is extremely essential that the sand preparation is completely automated. SLC has installed a Sand Plant from EIRICH which is operated using a SCADA based PLC, thereby reducing manpower intervention to a large extent. The sand preparation plants have PLC controlled systems and prepare moulding sand by a fully automated process in order to get high surface quality.