造型制芯的砂吹射过程可以分为三个阶段,由机器的气包Ⅰ、砂筒Ⅱ、射嘴Ⅲ和工艺装备Ⅳ(芯盒或砂箱)完成(图1a)。当空气由气包进入盛有型砂或芯砂的砂筒时形成的气砂流的特性,取决于固体成分的浓度:浓度低时是悬浮砂流,而浓度高时是密实砂流。在气包—砂筒段(图1δ)通过的只是空气。当空气流过砂时,在砂的运动层中产生了气流。在一个循环中,由于砂的被射出,砂筒的自由空间增大。由于砂的移动和空气对砂的渗透作用,在 Sand molding injection molding process can be divided into three phases, the air bag by the machine Ⅰ, sand tube Ⅱ, nozzle Ⅲ and process equipment Ⅳ (core box or sand box) to complete (Figure 1a). The characteristics of the gas flow formed when air is blown into a sand tank containing sand or core sand depend on the concentration of solid components: suspended sand at low concentrations and dense sand at high concentrations. In the gas bag - sand tube section (Figure 1δ) is passed only air. As the air flows through the sand, an air flow is created in the moving bed of sand. In one cycle, the free space of the sandbox increases due to the ejected sand. Due to the movement of sand and the infiltration of air into the sand,