一、前言二十多年来,国外有机粘结剂在造型制芯方面的应用,发展是很快的。但是,由于树脂价格的上涨和环保方面的问题,七十年代后期,使人们对无机粘结剂的开发研究又重新关心起来了。水玻璃砂用各种溃散剂的开发和六十年代末期开发的水玻璃有机脂自硬砂,引起了铸造厂的注意。有人认为,水玻璃砂的今后发展动向,必然是含液体硬化剂(有机脂)的自硬 First, the foreword For more than two decades, foreign organic binder in the modeling of the core application, the development is fast. However, due to rising resin prices and environmental concerns, the development of inorganic binders has since renewed interest in the late 1970s. Sodium silicate sand with a variety of ulcer agents and the development of the late sixties developed water glass organic fat self-hardening sand, casting factory attracted the attention. Some people think that the future development trend of sodium silicate sand, must contain liquid hardener (organic fat) self-hardening