将松散的铸造砂粘结在一起使之成为型砂或芯砂的造型材料。粘结剂和砂粒混合后包覆砂粒成为粘结剂膜，使砂粒互相粘连起来，从而赋与砂型和型芯以足够的强度，使其在搬运、组装和浇注过程中不致变形和破碎。
研究并开发出一种以eps为主要原料的无煤粉型砂粘结剂，实验表明乳化改性后的EPS水溶液性能优良。
By taking EPS emulsion as main raw material, a new casting binder of non-coal molding sand was developed. EPS water-borne property by modification is fine, and available for the casting binder.
本文研究了新型BY粘结剂在型砂中的应用。
The application of new BY binder in molding sand was studied.
本文研究了复合磷酸盐改性水玻璃粘结剂的制备及其型砂的混碾工艺和性能。
This paper deals with the preparation of composite phosphate modified sodium silicate binders and sand mined method and its properties.
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