作者介绍了聚乙烯醇(PVA)自硬砂代桐油砂、合脂砂和表干砂,制做形状复杂的潜水电泵叶轮芯、导叶体体壳芯和摩托车曲轴箱、变速箱壳体芯以及63吨可倾压力机机身砂型等,提高了铸件质量,降低了废品率,减少了公害,改善了清砂劳动条件。同时节约了能源,降低了生产成本,取得明显技术经济效益。 The author introduced polyvinyl alcohol (PVA) self-hardening sand on behalf of the tung oil sand, sand and sand dry table, making a complex shape of the submersible pump impeller core, guide vane body shell core and motorcycle crankcase, gearbox shell Body core and 63 tons of tilting press machine body sand, etc., improve the quality of castings, reduce the rejection rate, reduce the pollution, improve the cleaning working conditions. At the same time, energy is saved, the production cost is reduced, and obvious technical and economic benefits are achieved.