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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Design of a sheet forming apparatus for overflow fusion process by numerical simulation
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Design of a sheet forming apparatus for overflow fusion process by numerical simulation

机译：一种数值模拟的溢流熔合板成形装置的设计

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The overflow fusion process is an important method for the manufacture of glass sheets and is currently used for the production of TFT/LCD display devices. The design of the forming apparatus is critical for obtaining very high surface quality glass to allow the successful application of semiconductor type materials. However, there is only little work presented in the literatures, because of difficulties and expansions in experiments. In this study, a numerical model for simulation of molten glass flow through an isopipe during the overflow fusion process was carried out. An explicit finite difference algorithm with the surface tracking method has been proposed. The effect of the geometry of the forming apparatus, flow rate and viscosity of molten glass on the flow patterns during overflow was investigated. It was found that the stability and flatness of the sheet glass was influenced by the design of the forming apparatus, and the flow rate and viscosity of molten glass flow. The tilt angle at the bottom the of a trough should be high enough (5-7 degrees) to avoid the accumulation of molten glass. The smaller root angle (< 50 degrees) was better for recombination of two stream of glass. High flow velocity will induce an unsteady flow profile along the wall of the isopipe. A precise control of the working temperature was needed for maintaining an equal thickness along the isopipe. (c) 2007 Elsevier B.V. All rights reserved.
机译：溢流熔合工艺是制造玻璃板的重要方法，目前用于生产TFT / LCD显示设备。成形设备的设计对于获得非常高的表面质量的玻璃以成功应用半导体类型的材料至关重要。但是，由于实验的困难和扩展，文献中只有很少的工作提出。在这项研究中，建立了一个数值模型，用于模拟溢流熔融过程中通过等压管的熔融玻璃流动。提出了一种采用表面跟踪的显式有限差分算法。研究了成型设备的几何形状，熔融玻璃的流量和粘度对溢流过程中流动形态的影响。已经发现，平板玻璃的稳定性和平坦度受到成形设备的设计以及熔融玻璃流的流速和粘度的影响。槽底部的倾斜角度应足够大（5-7度），以免玻璃液积聚。较小的根角（<50度）对于两股玻璃流的重组更好。高流速将引起沿着等压管壁的不稳定流量分布。需要精确控制工作温度，以保持沿等压管的厚度相等。 （c）2007 Elsevier B.V.保留所有权利。

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