大型轮形铸钢件,如齿圈、半齿圈等,在轮缘上部均需设置较高大的冒口,该冒口一般用大块砂芯围成。为了降低铸件砂耗,笔者设计了一种适于轮形铸钢件的专用工装——盖箱(见附图)。盖箱的使用特点是:铸件轮缘顶部和冒口周围有薄层型砂,盖箱的其它部分和底部与砂型接触处不用型砂,因此型砂消耗降低到最低限度。 Large round steel castings, such as ring gear, semi-ring gear, etc., are required in the upper rim of a large riser, the riser generally surrounded by large sand core. In order to reduce the casting sand consumption, the author designed a special tooling for wheel steel castings - lid box (see photo). Cover the use of features are: castings top and riser around the thin layer of sand, the other parts of the lid and the bottom of the sand and the contact area without sand, sand thus reducing consumption to a minimum.