极端砂铁比铸件混线生产的型砂控制

Molding Sand Control by Mixed-Line Production of Casting in Extreme Ratio of Sand to Iron

摘要: 本文介绍了玉柴铸造厂铸三车间15种铸件混线生产，因铸件砂铁比差异大所带来的型砂管理问题，重点分析了缸体、缸盖极端砂铁比机型混线生产对型砂系统的影响及批量崩砂质量问题的解决思路，从型砂物质平衡及系统循环控制的角度分析了极端砂铁比机型混线生产导致型砂系统紊乱的原因，并提出了系统控制解决极端砂铁比机型混线生产的控制思路，遵循砂循环规律调整排产，并根据各机型实际情况按砂铁比现状分系列调整型砂配比，通过稳定型砂的有效土、有效煤粉及含泥量来保障型砂性能的稳定性，摸索出了多机型极端砂铁比机型混线生产的实践经验。

Abstract: This paper introduced the mixed-line production of 15 kinds of casting in three workshops of Yu-chai foundry. Because the sand:iron ratio is very different causing the management problem of molding sand, we analyzed the influence of mixed-line production by models of extreme sand:iron ratio in cylinder block or cylinder head on molding sand system, and the methods of solving quality problems of avalanche sand. From the perspectives of molding sand’s material balance and circulatory system control, the reasons leading to the disorder of molding sand system using mixed-line production by models of extreme sand:iron ratio were analyzed. Furthermore, the me-thods, which could solve the problem of mixed-line production by models of extreme sand:iron ratio through system control, were proposed. Production scheduling should be adjusted by following the sand cycle rules, and molding sand ratio should also be adjusted according to the actual cir-cumstance of various models. Through the stabilization of molding sand’s available soil, available braize and silt content to guarantee the stability of molding sand, we have earned experiences of mixed-line production by different models of extreme sand:iron ratio.