化学粘砂和机械粘砂是指在铸件的表面上牢固地粘结着一层金属与型壳材料结合物,它是熔模铸件常见的铸造缺陷之一。通过阐述熔模铸件化学粘砂和机械粘砂的外部特征,产生的部位、机理以及主要原因,提出了从熔模铸造的选材、制壳工艺、焙烧工艺及熔炼工艺等方面采取实用有效的对策,从而提高熔模铸件的合格率。 Chemical sticky sand and mechanical sticky sand means that the surface of the castings is firmly bonded with a layer of metal and shell material bond, which is one of the common casting defects of investment castings. By expatiating on the external characteristics, the place, the mechanism and the main reasons of chemical sticking sand and mechanical sticking sand, it is put forward that practical and effective measures should be taken from material selection, shell making, roasting and smelting of investment casting , So as to improve the pass rate of investment casting.