我厂铸造钻探机工具的各种铸钢套管卡瓦(形肤大致如图1所示,重3~6公斤)原先采用湿模平浇法,每箱做两块,铸出的铸件几乎全部都有气孔、落砂等毛病。为了使这些铸件不至于爆废便采用了焊补的办法补救,但是成本大大增高,而且质量也无法保证;而且这种铸造法效率很低,严重地影响了生产任务。针对上述缺陷并为了及 I cast a variety of cast steel casing tools Ciaka drilling tools (skin roughly as shown in Figure 1, weighing 3 ~ 6 kg) was originally wet-mode pouring method, each box to do two, cast almost castings All have stomata, falling sand and other problems. In order to make these castings will not burst will be used to repair the weld repair method, but the cost is greatly increased, but the quality can not be guaranteed; and this casting method is very inefficient, seriously affecting the production tasks. For the above defects and for the sake of