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研究了实型铸造干砂对垂直n型孔的充填性能．实验了主要工艺因素，如孔径、孔口深度、干砂粒形、振动方向、振动维数、振动频率、振动加速度等对其充填高度的影响．
The filling properties of vertical n-type holes by dry solid sand were studied. The main process factors such as pore size, depth of hole, dry sand shape, vibration direction, vibration dimension, vibration frequency and vibration acceleration were studied.