近年来,覆膜砂产量在我国有较大增长,其中大部是采用经济的热复膜方法生产的,利用热砂或为固体、或为液态酚树脂生产。本文阐述覆膜砂的发展可从树脂、砂以及复膜工艺改进以适应各种铸造合金生产需要。最成功的用于风冷气缸套。锰钢的铸造仍然在某些生产单位存在问题。对于轻合金易溃散复膜砂的制作等也进行了讨论。 In recent years, the output of coated sand has been greatly increased in our country. Most of them are produced by the economic hot-laminating method, which uses hot sand or solid or is produced by liquid phenolic resin. This article describes the development of coated sand from resin, sand and laminating process to adapt to a variety of casting alloy production needs. The most successful for air-cooled cylinder liner. Casting of manganese steel still has problems in some production units. The light alloy easy to collapse scattered film sand production also discussed.