Air core comes into being because of central minus pressure and goes through the hydrocyclone from the overflow gate to the bottom outlet after the flow field become steady.

其内部由于中心负压而形成空气柱，当流场稳定后，该空气柱从底流口到溢流口贯穿始终。

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The position of overflow and thicker inner gate was optimized to reduce the probabilities of cold shut, flow marks and slag. Furthermore, the surface quality of the die casting improves.

提出了在恰当位置设置溢流槽和增大内浇口厚度等改进措施，从而有效降低了铸件冷隔、流痕、夹渣等缺陷的产生，提高了压铸件表面质量。

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The position of overflow and thicker inner gate was optimized to reduce the probabilities of cold shut, flow marks and slag. Furthermore, the surface quality of the die casting improves.

提出了在恰当位置设置溢流槽和增大内浇口厚度等改进措施，从而有效降低了铸件冷隔、流痕、夹渣等缺陷的产生，提高了压铸件表面质量。

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