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铸造车间配制型砂时,旧砂所占比例最大,所以旧砂质量对型砂质量影响很大。为了确保铸造生产的顺利进行和获得优质铸件,必须建立一个完善的能够保证质量的旧砂处理系统,这就是我们进行这一技术改造的出发点。一、概况我厂机械化灰铸铁车间目前的产量已为原设计的1.5倍,砂处理工部采用集中布置。随着产量的增加,虽然在1976年完成了混砂系统自动控制及水分自动测定的技术改造,但旧砂系统仍存在以下问题:①输送能力不足,使大小两条造型线无法组织同时平行作业;②旧砂温度过高,使型砂性能难于控制;③旧砂库容
Casting plant preparation sand, the largest proportion of the old sand, so the quality of the old sand has a great impact on the quality of sand. In order to ensure the smooth progress of the casting production and obtain the high-quality casting, we must establish a perfect quality assurance system of old sand, which is the starting point of our technological transformation. I. Overview I plant mechanized gray cast iron workshop current production has been 1.5 times the original design, sand processing department adopts centralized arrangement. With the increase of output, although the technological transformation of automatic control of sand mixing system and automatic determination of moisture has been completed in 1976, the following problems still exist in the old sand system: (1) The conveying capacity is not enough, so that the two size lines can not be organized and work in parallel ; ② the old sand temperature is too high, making it difficult to control the performance of the sand; ③ old sand storage capacity