采用改性水玻璃改善自硬砂溃散性的试验研究表明,改性水玻璃-酯自硬砂溃散性良好,再配以QM附加物,自硬砂残留抗压强度进一步降低,在800℃时,残留强度小于0.1MPa,在1000℃时,残留强度小于0.3MPa,浇注后容易落砂清理。文中对改性水玻璃的制备、酯 Experimental study on improving the collapsibility of self-hardening sand with modified water glass showed that the modified water glass-ester self-hardening sand had good collapsibility. When combined with QM adduct, the residual compressive strength of self-hardening sand further decreased. At 800 ℃ , The residual strength of less than 0.1MPa, at 1000 ℃, the residual strength of less than 0.3MPa, easy to clean sand after pouring. In this paper, the preparation of modified water glass, ester