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1. 发明公开

EP2380681A4 NOZZLE FOR DISCHARGING MOLTEN METAL 审中-公开
标题翻译： DÜSEZUR ENTLADUNG VONFLÜSSIGEM材料
公开(公告)号：EP2380681A4
公开(公告)日：2017-08-02
申请号：EP10802122
申请日：2010-05-20
申请人： KROSAKIHARIMA CORP
发明人： MIZOBE ARITO , KAWABE HIDEAKI , KIMURA MANABU
IPC分类号： B22D11/10 , B22D41/50
CPC分类号： B22D41/50
摘要： 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.
摘要翻译：本发明提供一种能够以简单的结构抑制通过内孔的熔融金属流中的紊流的熔融金属排出喷嘴。沿内孔的轴线截取的内孔的壁表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‰‰‰1.5; L是喷嘴的长度; Hc是一个计算静水压头; r（z）是位于从喷嘴的上端向下方距离z的位置处的内孔的半径，其中在距离z相对于水平轴（X轴）绘制的图中，并且在位于距离z的位置处的水平横截面中的内孔中心处的熔融金属的压力相对于其垂直轴（Y轴）绘制时，在所述内孔中的线上的近似公式在不同时包括具有相反符号的两个或更多个系数的情况下建立图表，并且其中，假定所述线是基于线性回归的近似公式导出的，所述线的相关系数的绝对值是0.95或更大。

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