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针对酯硬化水玻璃自硬砂在使用过程中出现的砂型变形和旧砂回用性差两大难题，采取了使用优质新型水玻璃。低加入量（＜３％）。配套有机酯固化剂的措施，使生产得以正常运行，型砂使用得以平衡。
For the ester hardened water glass self-hardening sand in the course of the sand deformation and the old sand used poor two major problems, the use of high-quality new water glass. Low addition (<3%). Supporting organic ester curing agent measures to enable production to be normal operation, the use of sand to be balanced.