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研究一种水玻璃砂铸件落砂方法。采用树脂砂作铸型的面砂，水玻璃砂作背砂，填砂后一起紧实，一起吹ＣＯ２硬化。由于ＣＯ２硬化树脂砂溃散性好，浇注铸钢件不粘砂，浇注后的铸件就像穿了一层松散的外衣，很容易落砂，而且这种复合砂铸型容让性特别好，铸件不易产生热裂。
Study of a water glass sand casting sand method. Resin sand for the sand mold for the sand, water glass sand for the back sand, sand together after the compaction, together with CO2 hardening. As CO2 hardened resin sand good collapsible, pouring steel casting non-stick sand, cast castings like wearing a loose coat, it is easy to shake off, and the composite sand casting to make particularly good sex, castings Not easy to produce thermal cracking.