The green sand casting process can achieve high production rate. The floor molding with green sand can produce castings of 100 to 200 sand boxes each day, e.g. about 100 pieces to 2000 pieces each day. The automatic molding process with green sand can produce castings of 20 tons each day.
Green sand mold is a kind of soft mold, so it is not hard enough as the resin sand molds and shell molding. So, there are more casting defects such as sand residuals, sand holes, air holes and shrinkages.