我厂铸造车间生产的液压元件毛坯,材质是高强度孕育铸铁,要求铁水浇注温度较高,造型方法采用湿型,铸件表面粘砂严重。又由于内腔结构复杂,芯砂很难完全清除,仅采用普通的清理方法,往往得不到满意的效果。一九七二年我们参考日本进口燃气加热式电化学清砂设备,自制安装了一套硅整流、电阻加热式电化学清砂系统,几年来的生产实践证明 I plant casting workshop production of hydraulic components rough, the material is high strength cast iron, requiring hot metal pouring temperature, modeling methods using wet type, castings surface sticky sand serious. And because of the complex cavity structure, core sand is difficult to completely remove, only using ordinary cleaning methods, often can not get satisfactory results. In 1972 we refer to Japan imported gas-heated electrochemical sand cleaning equipment, made a self-installed silicon rectifier, resistive heating electrochemical sand cleaning system, the past few years of production proved