水玻璃是我国熔模精密铸造应用最为广泛的型壳粘结剂,作者京华同志对这一现状的合理性提出质疑,近年来对水玻璃、硅酸乙酯和硅溶胶三种粘结剂的研究有了新的进展,为粘结剂的正确选用提供了理论和试验依据。另外,提高熔模铸件的尺寸精确度和表面光洁度已关系到这一工艺方法的前途和命运,此文的发表,期望引起全国精铸界同行的讨论和争论。 Water glass is China’s investment casting the most widely used shell binder, the author Comrade Jinghua questioned the rationality of the status quo in recent years, water glass, ethyl silicate and silica sol three kinds of binder The research has made new progress, provided the theory and experimental basis for the correct choice of binder. In addition, to improve the dimensional accuracy of investment casting and surface finish has been related to the future and fate of this process, the publication of this article, hoping to arouse the discussion and debate of the national counterparts of the casting community.