水玻璃作为铸型粘结剂完全符合技术、经济和生产的要求,但因其溃散不好,清砂困难,影响其扩大应用。积多年的经验而论,减少型砂中水玻璃的用量,是改善溃散性的最有效方法。但这必须保证由于减少粘结剂用量而不降低砂型的物理机械性能,特别是不能降低砂型的强度和落砂性。 Water glass as a mold binder fully meet the technical, economic and production requirements, but because of its collapse is not good, sand cleaning difficulties, affecting its expansion. Based on years of experience, reducing the amount of sodium silicate used in molding sand is the most effective way to improve collapsibility. However, this must ensure that the sand-type strength and the sand-falling property can not be reduced, in particular, by reducing the amount of binder without impairing the physical-mechanical properties of the sand.