垂直分型无箱射压造型机(以下简称挤压机)是近年来发展的新型高速高效造型设备。按设计要求,挤压机与砂型同步输送机推型动作应严格同步。但是,生产中往往由于气、液波动和压力继电器等元件的误差,而造成主辅机不同步,影响生产进度。我厂使用的是自己制造的YZ4×5型挤压机,砂型尺寸 Vertical type boxless injection molding machine (hereinafter referred to as the extruder) is the development of new high-speed and efficient molding equipment in recent years. According to design requirements, extrusion presses and sand-type conveyor synchronous push action should be strictly synchronized. However, the production is often due to gas, liquid fluctuations and pressure relays and other components of the error, resulting in main and auxiliary machines are not synchronized, affecting the production schedule. I plant is used to manufacture their own YZ4 × 5-type extruder, sand size