上一讲谈了酯硬砂在铸钢上的应用,现以上海印刷机铸造厂、上海汽轮机厂、上海造纸机械厂、贵州险峰机床厂和哈尔滨汽轮机厂等生产企业的大量工艺试验和生产实际取得的效果为例,讲一讲酯硬砂在铸铁上的应用。 1.型砂配制工艺和影响性能的因素 (1)型砂的配制工艺 上海印刷机铸造厂自80年代使用有机酯水玻璃自硬砂,至今已13年了。他 Last talked about the application of ester hard sand in steel casting, now in Shanghai printing press foundry, Shanghai Steam Turbine Works, Shanghai Paper Machinery Factory, Guizhou Xianfeng Machine Tool Plant and Harbin Steam Turbine Factory and other manufacturing enterprises a large number of experimental and practical production process The results achieved, for example, to explain the application of ester hard sand on the cast iron. 1. Sand molding process and factors that affect performance (1) sand preparation process Shanghai printing press foundry since the 80’s use of organic ester water glass self-hardening sand, it has been 13 years. he