KIT FOR CAST MOLDING, SAND COMPOSITION FOR CAST MOLDING, AND MANUFACTURING METHOD THEREOF

PROBLEM TO BE SOLVED: To provide a kit for cast molding, having a sufficient hardening rate even when reducing a used amount of sulfuric acid, capable of manufacturing a high-hardness cast; and to provide a sand composition for cast molding, and a manufacturing method thereof.SOLUTION: There are provided a kit for cast molding containing component (A), component (B) and component (C), and a sand composition for cast molding which is a mixture of the component (A), the component (B), the component (C) and component (D), and a manufacturing method thereof; component (A): magnesium sulfate or ammonium sulfate; component (B): an acid hardener; component (C) a binder containing furfuryl alcohol; component (D): a fire-resistant granular material.SELECTED DRAWING: None 【課題】硫酸の使用量を減らしても充分な硬化速度を有し、強度の高い鋳型を製造できる鋳型造型用キットおよび鋳型造型用砂組成物とその製造方法の提供。【解決手段】下記（Ａ）成分と、（Ｂ）成分と、（Ｃ）成分とを含む鋳型造型用キット。下記（Ａ）成分と、（Ｂ）成分と、（Ｃ）成分と、（Ｄ）成分との混合物である鋳型造型用砂組成物およびその製造方法。（Ａ）成分：硫酸マグネシウムまたは硫酸アンモニウム（Ｂ）成分：酸硬化剤（Ｃ）成分：フルフリルアルコールを含む粘結剤（Ｄ）成分：耐火性粒状材料【選択図】なし