| 摘要 |
A glass sheet production method having: a melting step; a molding step that uses the overflow downdraw method; and a glass ribbon annealing step. In the glass ribbon annealing step, a glass ribbon is drawn downwards and annealed while a neighboring area adjacent in the width direction of the glass ribbon relative to both end sections in the glass ribbon width direction is sandwiched between a plurality of conveyance roller pairs disposed in the conveyance direction for the glass ribbon. In the molding step, after the glass ribbon is formed, both end sections of the glass ribbon in the width direction are cooled faster than the center section of the glass ribbon in the width direction. In the annealing step, tension is applied to the glass ribbon in the conveyance direction, in a temperature range in which the temperature of the glass ribbon is at least the glass transition temperature but no more than the glass softening point, so that plastic deformation does not occur in the glass ribbon. |
