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我厂自推行一型多铸法以来,先后试造了多种产品,像大平板、滚筒等,但是缺点存在很多,滚筒只能浇五六次,大平板只能浇三四次,检查结果有以下几点。1．首先是铸型的耐火强度太差,受不住高温铁水的冲击,损坏铸型。我厂过去一型多铸使用的型砂,一共有五种,四种是造型用,一种是修型用。采用六合红砂为主要原料,再加白坭水、红煤粉或炭灰,这种型砂最大的缺点就
Since the implementation of our factory a type of multi casting method, has made a variety of products, such as large flat, roller, etc., but there are many shortcomings, the roller can only be poured five or six times, large flat can only be poured three or four times, the test results Have the following points. 1. The first is the mold fire resistance is too poor, can not stand the impact of hot metal, damage to the mold. I plant in the past more than one type of cast sand used, a total of five, four are modeling, one is used for repair. The use of Liuhe red sand as the main raw material, together with white water, red coal or charcoal, the biggest drawback of this type of sand on