我厂的树脂自硬砂造型生产线自 1 995年正式投产以来 ,铸件的外观质量和尺寸精度都有了很大的提高。但是 ,由于采用的是以前粘土砂湿型和干型用砂箱 ,吃砂量普遍太大 ,砂铁比太高 ,有的达到了 7∶1 ,致使旧砂回用困难 ,铸件成本增加。为了降低成本 ,减小砂铁比 ,提高生产效率 , Since the formal production of resin self-hardening sand molding production line of our factory from 1995, the appearance quality and dimensional precision of castings have been greatly improved. However, due to the previous clay sand wet and dry sand box, the amount of sand eaten is generally too large, the ratio of sand to iron is too high, and some reach 7: 1, which makes the reuse of old sand difficult and the casting cost increases. In order to reduce costs, reduce sand iron ratio, improve production efficiency,