本文利用高速摄影直接观察的方法对射砂过程进行了研究，同时还对砂芯内的密度分布进行了测试。
This paper reports the result of direct observation of shooting process with high speed camera and the density distribution of the cores.
由于砂芯通常采用射芯的方法来制造，因此，了解射砂过程的机理，并且在此基础上对射砂过程加以控制，就显得至关重要。
Therefor, it is greatly significant to clarify the mechanism of sand blowing process so as to control the production of sand core.
为了获得优质的砂芯，必须对射砂过程有充分的了解。
To get quality cores, core shooting process must be well known.
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