一、前言水玻璃有机酯自硬砂是一种以水玻璃作粘结剂,以有机酯作硬化剂的新的造型(或制芯)混合料。近年来,它在国外的应用正在迅速增加。这种自硬砂性能好,成本低,原材料问题容易解决,比较适合我国目前情况。前几年,国内有的工厂曾在铸钢生产中试用石灰石有机酯自硬砂,后因溃散性差、旧砂不能回用、冬季硬化速度低等问题,未能正常应用和推广。至于在铸铁生产中,以前国内尚未用过这种自硬砂。由于采用自硬砂新工艺能显著提高生产效率,缩短生产周期,提高铸件质量,改变铸造 First, the foreword Water glass organic ester self-hardening sand is a water glass as a binder, organic ester as hardener new shape (or system core) mixture. In recent years, its application abroad is rapidly increasing. This hard sand performance, low cost, easy to solve the problem of raw materials, more suitable for our current situation. A few years ago, some domestic factories in the steel production trial of limestone organic ester self-hardening sand, after the collapse due to poor, old sand can not be reused, the winter hardening rate is low and other problems, failed to normal application and promotion. As for the production of cast iron, this kind of self-hardening sand has not been used before in China. Since the use of new technology from the hard sand can significantly improve production efficiency, shorten the production cycle, improve casting quality, change casting