Double crucible for a glass drawing method and method of making glass fiber or a preform with the double crucible
    51.
    发明申请
    Double crucible for a glass drawing method and method of making glass fiber or a preform with the double crucible 失效
    双坩埚用于制造玻璃纤维的玻璃拉制方法和制造方法或具有双坩埚的预成型体

    公开(公告)号:US20040060325A1

    公开(公告)日:2004-04-01

    申请号:US10614449

    申请日:2003-07-07

    CPC classification number: C03B5/1675 C03B5/1672 C03B37/023 C03B2201/60

    Abstract: The double crucible for a glass drawing method has a heatable outer crucible (1) and an inner crucible (2) surrounded by the outer crucible (1), which is heatable separately from the outer crucible (1). Both crucibles (1,2) have an outlet nozzle (1a, 2a) for the glass to be drawn. To make glass fibers from heavy metal oxide glass (HMO-glass) with higher quality and comparatively simple crucible features, the outlet nozzle (1a) of the outer crucible (1) extends a certain distance beyond the outlet nozzle (2a) of the inner crucible (2). Surfaces of the outlet nozzles coming in contact with the glass melt are polished and are provided on a material, which has a reducing action on heavy metal glass in the melt in all cases. These surfaces also have sufficient mechanical strength for and chemical inertness to heavy metal oxide glass.

    Abstract translation: 用于玻璃拉制法的双坩埚具有由外坩埚(1)包围的可加热的外坩埚(1)和内坩埚(2),其与外坩埚(1)分开加热。 两个坩埚(1,2)都具有用于待拉制玻璃的出口喷嘴(1a,2a)。 为了从具有更高质量和相对简单的坩埚特征的重金属氧化物玻璃(HMO玻璃)制造玻璃纤维,外坩埚(1)的出口喷嘴(1a)延伸一定距离,超出内坩埚的出口喷嘴(2a) 坩埚(2)。 与玻璃熔体接触的出口喷嘴的表面被抛光,并且在所有情况下都提供在对熔体中的重金属玻璃上具有还原作用的材料上。 这些表面也对重金属氧化物玻璃具有足够的机械强度和化学惰性。

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