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    • 5. 发明公开
    • PLATE GLASS MANUFACTURING APPARATUS AND PLATE GRASS MANUFACTURING METHOD
    • FLACHGLASHERSTELLUNGSVORRICHTUNG UND FLACHGLASHERSTELLUNGSVERFAHREN
    • EP1832558A1
    • 2007-09-12
    • EP05800316.1
    • 2005-11-07
    • Nippon Electric Glass Co., Ltd.
    • KANO, Tomonori c/o NIPPON ELECTRIC GLASS CO., LTD.
    • C03B17/06
    • C03B7/02C03B17/064Y02P40/57
    • A supplying tube 2 of a molten glass, which is placed in a downstream end portion of a supplying passage directing the molten glass flowing out of a melting furnace to a forming vessel 1a in a forming furnace 1, has a small diameter tube portion 2a which has a small flow passage area and is provided at an upstream side, and a large diameter tube portion 2c which is provided at a downstream side of the small diameter tube portion 2a and has a large flow passage area. An expanded diameter tube portion 2b of which flow passage area gradually expands toward the downstream side is interposed between the small diameter tube portion 2a and the large diameter tube portion 2c. The small diameter tube portion 2a, the expanded diameter tube portion 2b, and the large diameter tube portion 2c may be integrally and continuously connected to one another.
    • 将熔融玻璃的供给管2放置在将从熔融炉流出的熔融玻璃引导到成形炉1中的成形容器1a的供给通道的下游端部,具有小直径的管部2a, 具有小流路面积并设置在上游侧,以及大直径管部分2c,其设置在小直径管部分2a的下游侧并且具有大的流路面积。 在小径管部分2a和大直径管部分2c之间插​​入有一个其流动通道面向下游侧逐渐扩大的扩径管部分2b。 小直径管部分2a,扩径管部分2b和大直径管部分2c可以彼此一体地连续地连接。