| 摘要 |
A method for manufacturing a glass plate by a downflow method, the method provided with a forming step for forming molten glass into a sheet-shaped glass plate, and an annealing step for annealing the glass sheet formed in the forming step using a plurality of heaters in an annealing space surrounded by furnace walls, the heaters for controlling the temperature in the annealing space, while conveying the glass sheet vertically downward. In the annealing step, the amount of retained head retained by the glass plate is determined together with the amount of heat in the annealing space using the amount of heat generated by the heaters, the distortion of the glass plate is determined on the basis of a pre-established relationship between the amount of retained heat and the distortion of the glass plate, and the amount of heat from the heaters is controlled, and the amount of retained heat in the glass plate is thereby corrected, and distortion of the glass plate is suppressed. |
