在过去的二十多年里,化学粘结剂型砂在型芯制造中占绝对优势。虽然有机粘结剂的使用特别好,但是在混砂、硬化和存放时会发散出臭气和有毒的蒸汽,浇注和落砂时会产生烟气和分解产物以及成本较高。这就使得人们有兴趣去发展无机粘结剂。最常用的无机粘结剂是以水玻璃和磷酸盐为基的水基材料。它们在混砂、浇注和落砂操作时不会产生苯酚、甲醛等有机蒸汽,但是其缺点是强度较低以及落砂和再生问题,已经阻碍了无机粘结剂的广泛使用。水玻璃粘结剂在1898年作为英国专利。1950年以前还没有在铸造厂广泛的应用。1960年初,研究了许多不用二氧化碳气体来硬化水 Over the past two decades, chemical binder sand has gained an absolute advantage in core manufacture. Although organic binders are particularly well used, odor and toxic vapors can be emitted during sand mixing, curing, and storage. Fouling and decomposition products are produced when pouring and falling sand and are costly. This makes people interested in developing inorganic binders. The most commonly used inorganic binders are water-glass and phosphate-based water-based materials. They do not produce organic vapors such as phenol, formaldehyde and the like during the sand mixing, pouring and shakeout operations, but their disadvantages are the low strength and the problems of sand and regeneration which have hindered the widespread use of inorganic binders. Water glass binder in 1898 as a British patent. Before 1950 there is not a wide range of applications in the foundry. In early 1960, many studies did not use carbon dioxide gas to harden water