| 摘要 |
[Solution] A float glass production device has a bath containing a molten metal, a ceiling extending above the bath from an entrance wall to an exit wall, and a plurality of dividing walls provided spaced apart in the flow direction of a glass ribbon flowing above the liquid level of the molten metal and protruding from the lower surface of the ceiling thereby dividing a forming space enclosed by the ceiling, the bath, the entrance wall and the exit wall. The horizontal distance between the upstream extremity of a first dividing wall, counting from the entrance wall, and the upstream extremity of the entrance wall is 3.5 to 6.5 times a reference distance, and the distance in the vertical direction between the lower extremity of the first dividing wall and the lower surface of the ceiling is 0.4 to 0.9 times the reference distance. An exhaust portion is provided on a side wall of a first space formed between the first dividing wall and the entrance wall, said exhaust portion exhausting gas from the first space to the exterior of the forming space. |
