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Method and apparatus for controlling the temperature of a layer of molten glass in a bath of molten metal
Method and apparatus for controlling the temperature of a layer of molten glass in a bath of molten metal
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机译：用于控制熔融金属浴中的熔融玻璃层的温度的方法和设备
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摘要
In the manufacture of flat glass in ribbon form during which molten glass is in contact with molten metal, the glass is locally thermally conditioned by passing an electric current through the thickness of the molten glass. Molten glass is poured from a spout 3 on to a bath of molten tin, or tin alloy 6 contained within a tank having a protective atmosphere and along the length of which are thermal conditioning means. The molten glass is first contained between two divergent side walls 18 before it is allowed unhindered lateral flow, the molten glass also forming a heel 22 underneath the spout. Two opposed pairs of molybdenum electrodes 23, 24 are supported on the side walls 18 and just dip into the molten glass layer. They are connected through electrical circuits with corresponding electrodes in the molten metal bath. The circuits may be such that each electrode or each pair of electrodes may be controlled. The electrodes have a downward taper and are accurately positioned on the sidewalls 18 by angled blocks 29. Spacing blocks 38, (39) are placed between each pair of electrodes. Alternatively the electrodes or electrode may be positioned in the heel 22.
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