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    • 4. 发明申请
    • MOLTEN METAL DISCHARGE NOZZLE
    • US20110017784A1
    • 2011-01-27
    • US12816713
    • 2010-06-16
    • Arito MIZOBEHideaki KawabeManabu Kimura
    • Arito MIZOBEHideaki KawabeManabu Kimura
    • B22D41/50
    • B22D41/50
    • Provided is a molten metal discharge nozzle capable of suppressing turbulence in a molten metal stream passing through an inner bore thereof, with a simple structure. A cross-sectional shape of a wall surface of the inner bore, taken along an axis of the inner bore, comprises a part or an entirety of a curved line expressed by the following formula: log(r(z))=(1/n)×log((Hc+L)/(Hc+z))+log(r(L)) (1), where: 6≧n≧1.5; L is a length of the nozzle; Hc is a calculative hydrostatic head; and r(z) is a radius of the inner bore at a position located a distance z downward from an upper end of the nozzle, wherein, in a graph where the distance z is plotted with respect to a horizontal axis (X-axis) thereof, and a pressure of molten metal at a center of the inner bore in horizontal cross-section at a position located the distance z is plotted with respect to a vertical axis (Y-axis) thereof, an approximation formula of a line on the graph is established without simultaneously including two or more coefficients having opposite signs, and wherein, on an assumption that the line is derived from an approximation formula based on a linear regression, an absolute value of a correlation coefficient of the line is 0.95 or more.
    • 提供一种能够以简单的结构抑制通过其内孔的熔融金属流中的湍流的熔融金属排出喷嘴。 沿着内孔的轴线截取的内孔的壁面的横截面形状包括由下式表示的曲线的一部分或全部:log(r(z))=(1 / n)×log((Hc + L)/(Hc + z))+ log(r(L))(1)其中:6≥n≥1.5; L是喷嘴的长度; Hc是计算静压头; 并且r(z)是位于从喷嘴上端向下一定距离z的位置处的内孔的半径,其中,在相对于水平轴(X轴)绘制距离z的曲线图中, 并且在位于距离z的位置处的水平横截面的内孔中心处的熔融金属的压力相对于其垂直轴(Y轴)绘制,在该方向上的线的近似公式 在没有同时包含具有相反符号的两个或更多个系数的情况下建立图形,并且其中,假设线是基于线性回归的近似公式导出的,则线的相关系数的绝对值为0.95以上。