一、前言混砂机单元自动控制,主要指包括混砂机加料、干混、加水、湿混、卸料等全过程的自动控制。并在这一过程中自动地进行型砂性能的控制。混砂机单元顺序控制比较容易做到,目前国内使用的厂已有不少。但包括型砂性能控制在内的自动控制,尚处于试验发展阶段。国内大多数工厂对于型砂质量的控制,除了靠“手 I. Introduction Automatic control sand mixer unit, mainly refers to the sand mixer, dry mix, add water, wet mixing, unloading the whole process of automatic control. And in the process of automatic control of sand performance. Mixer unit sequence control easier to do, the current domestic use of the factory have a lot. However, including automatic control of sand performance control, is still in the experimental stage of development. Most domestic factories for the control of sand quality, in addition to rely on "hand