目前,在国内大多数熔模铸造生产车间中,面层涂料(以下简称“涂料”)的质量控制是以涂料粘度为标准。也就是说,配制涂料时不称量水玻璃和石英粉的重量,而是边搅拌水玻璃边加入石英粉,加到涂料的粘度合格为止。生产实践和试验结果表明,涂料的粘度受很多因素的影响,只控制粘度往往会导致配比失调,影响铸件质量。 At present, the quality control of the surface coating (hereinafter referred to as “coating”) is based on the viscosity of the coating in most investment casting workshops in China. In other words, the preparation of paint does not weigh the weight of water glass and quartz powder, but while stirring water glass added quartz powder, added to the viscosity of the paint so far. Production practice and test results show that the viscosity of paint by many factors, only the viscosity control often lead to imbalance in the ratio, affecting casting quality.