LK_3改性水玻璃砂的应用

Application of LK_3 Modified Silicate Bonded Sand

我厂与奥地利合作生产AM-50型半煤岩巷掘进机铸钢件,结构复杂,光洁度、精度要求较高,型芯较多,采用了LK,改性水玻璃砂制作,生产了近550t铸件。在原工艺基础上吹CO_2,满足了工艺、技术要求,解决了个别件裂缝疵病,环境污染有所改善,型砂成分降低145元/t,说明了批量少的复杂件型芯采用该型砂比用树脂自硬砂制作。

This paper introduce main mechanism on application of LK_3 modified silicate bonded sand, involving requirement for sand strength and affecting factors as well as an example of application.