我厂是一个150多人的小型铸造厂。1965年之前采用手工造型,厂月产可锻铸铁件90吨左右,每天要处理120吨背砂,当时用人工筛砂和震动吊筛两种方法处理背砂,产量低、质量差、劳动强度高、劳动条件差。为改变这种落后面貌,我们在学习兄弟厂经验的基础上制成了这台移动式筛送砂联合机,经过近两年的使用,性能良好,深受工人欢迎。这台机器与手工筛或震动吊筛比较,因 Our factory is a small foundry of more than 150 people. 1965 before the use of hand-molding, factory production of malleable iron castings about 90 tons, 120 tons of sand daily to deal with, then with manual sieve sand and vibrating hanging sieve two ways to deal with back sand, low yield, poor quality, high labor intensity, Poor working conditions. In order to change this backwardness, we made this mobile screen sand-grading machine based on the experience of brother factory. After nearly two years of using it, it has been well-served by the workers. This machine compared with the manual screen or vibrating screen hanging, because