| 摘要 |
<p>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 contains 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.</p> |
