目前，国内外大多数铸造厂家使用的树脂自硬砂的粘结剂为呋喃树脂，呋喃树脂的常用固化剂主要是各种芳香烃磺酸或其混合物，用水、甲醇、乙醇等作为溶剂，用以调整粘度和酸值，控制呋喃树脂的硬化速度和可使用时间，以适应四季不同的温度环境、使用要求和设备条件等。自硬砂混 At present, most domestic and foreign foundry manufacturers use resin binder of self-hardening sand as furan resin, furan resin commonly used curing agent is mainly a variety of aromatic sulfonic acid or its mixture, with water, methanol, ethanol as a solvent, with To adjust the viscosity and acid value, control the curing rate of furan resin and can be used to meet the four seasons of different temperature environment, the use of requirements and equipment conditions. Self-hardening sand