我国目前铸工车间以使用粘土砂为主,而在型砂的周转系统中,砂量合理平衡问题往往被忽视:该扔的没扔。不该扔的扔了。而这问题给铸件质量与铸件成本带来很大的影响。废料应扔那些?如何扔?这又和旧砂再生密切相关的,本文就以上这些问题谈一些初浅的看法。 At present, the foundry workshop mainly uses clay sand in our country, while in the turnover system of sand, the problem of reasonable balance of sand amount is often neglected. Throwing should not throw. This problem has a great impact on the quality of castings and casting costs. Waste should throw those? How to throw? This is closely related with the regeneration of the old sand, this article on some of these issues to talk about some original ideas.