FLOAT GLASS PRODUCTION DEVICE, FLOAT GLASS PRODUCTION METHOD, AND FLOAT GLASS

• Main Authors: YAMAMOTO YOHEI, KAWASAKI NAOYA, TAKIGUCHI TETSUSHI
• Format: Patent
• Language: English; Japanese
• Published: 01.07.2022
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; METALLURGY; MINERAL OR SLAG WOOL; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS

To provide a technology for obtaining a float glass which has a large plane view size with reduced warping.SOLUTION: A float glass production device includes; a bath, a plurality of top rolls, a ceiling, a plurality of heaters, and a plurality of controllers. The bath has a narrow part, a middle part, and a wide part from a lower stream edge to an upper stream side in this order. The narrow part has a deep bottom part, a shallow bottom part, and a pocket part from the low stream edge to the upper stream side in this order. In each division formed by dividing the ceiling into a flowing direction and a width direction of a glass ribbon, there are provided the plurality of heaters collectively controlled by one of the controllers selected for each division. An interval in the flowing direction between a first division line which divides two neighboring rows in the flowing direction, and which is the nearest to the lower stream edge of the pocket part, and the lower stream edge of the pocket part is 0% to 15% of a length in the flowing direction of the pocket part.SELECTED DRAWING: Figure 7 【課題】平面視サイズが大きく、反りが小さいフロートガラスを得る、技術を提供する。【解決手段】フロートガラス製造装置は、浴槽と、複数のトップロールと、天井と、複数のヒータと、複数の制御器と、を備える。前記浴槽は、下流端から上流側に向けて、ナロー域と、中間域と、ワイド域と、をこの順番で有する。前記ナロー域は、下流端から上流側に向けて、深底部と、浅底部と、ポケット部と、をこの順番で有する。前記天井を前記ガラスリボンの流れ方向と幅方向に分割してなる各区画には、前記区画毎に選択される１つの前記制御器で一括に制御される複数の前記ヒータが設けられる。前記流れ方向に隣り合う２つの前記列を分割する第１分割線であって前記ポケット部の下流端に最も近い前記第１分割線と、前記ポケット部の下流端との前記流れ方向の間隔は、前記ポケット部の前記流れ方向の長さの０％～１５％である。【選択図】図７