To improve a hardening speed and strength of a mold to thereby enhance productivity with the result that work environment, profitability and quality of casting are improved concurrently. A specified caking additive composition for forming a mold contains 6.0 to 25.0 weight percents of metallic salts of organic sulfonic acid, a specified hardener composition for forming a mold 0.5 to 20.0 weight percents of metallic salts of organic sulfonic acid, and a sand composition for forming a mold contains the caking additive composition for forming a mold and/or the hardener composition for forming a mold.
提高模具的硬化速度和强度,从而提高生产率,同时改善工作环境、盈利能力和铸造质量。一种特定的用于成型模具的结块添加剂组合物含有 6.0 至 25.0 重量百分比的有机
磺酸金属盐,一种特定的用于成型模具的硬化剂组合物含有 0.5 至 20.0 重量百分比的有机
磺酸金属盐,一种用于成型模具的砂组合物含有用于成型模具的结块添加剂组合物和/或用于成型模具的硬化剂组合物。