| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a float glass manufacturing apparatus and a float glass manufacturing method that can suppress a local decrease of the width-directional temperature distribution of a glass ribbon between a molding device and a slow cooling device.SOLUTION: A float glass manufacturing apparatus includes a temperature adjusting device which adjusts the temperature of a glass ribbon G between a molding device and a slow cooling device, and the temperature adjusting device has a plurality of heater groups 51, 52 comprising a plurality of heaters 51a to 51g, 52a to 52g arranged along a width of the glass ribbon G. The heaters 51a to 51g, 52a to 52g in the heater groups 51, 52 are controlled by zones Z11 to Z17, Z21 to Z27 arrayed along the width of the glass ribbon G, and the heater groups 51, 52 are arranged on opposite sides across the glass ribbon G, mutual borders of the upper-side zones Z11 to Z17 and mutual borders of the lower-side zones Z21 to Z27 being shifted at at least one place along the width of the glass ribbon G.</p> |
