木屑坭心砂和湿模型砂的性能要求如何?

• 作 者: 陈志忠 袁烨
• 出 处: 铸工
• 发表日期: 1954年12期
• 关键词: 型砂 铸件 硬木 志忠 辨法 清砂 模型 平板 耐火性 平面

陈志忠同志:普通在铸造平面很大如平板一类的铸件时,可以在型砂内加入l~2%的木屑(最好用硬木的木屑),借以防止铸件表面起皮。在坭心砂内加入木屑时,主要作用是使浇出的铸件容易清砂。但是不论在型砂或坭心砂内,所含的木屑不宜过多,因容易疏松之故,这是使用木屑型砂或木屑坭心砂的最大缺点,补救的辨法,只有将砂的湿强度提高。

Comrade Chen Zhizhong: When casting large flat surfaces such as slabs, it is advisable to add l ~ 2% of sawdust (preferably hardwood sawdust) to the molding sand to prevent the castings from peeling off. When adding sawdust in heart sand, the main effect is to make the casting pouring out easy to clean the sand. However, no matter in the sand or sand heart sand contained in the wood should not be too much, because it is easy to loose, it is the use of wood flour or sawdust heart sand the biggest drawback, the remedy of discrimination, only the wet sand to improve .