| 摘要 |
The disclosure teaches an overflow device is provided at the far end of the trough and is used in conjunction with tilting of the apparatus. The forming apparatus can be made with non-linear weirs to provide a greater range of flow rates. The glass flow in the inflow pipe or in the trough itself can modulated to provide more uniform time dependent flow for forming the sheet. Forming apparatus designs for use with molten glass under pressure are provided. Additional orifices can be included on the bottom or sides to allow greater variability in sheet thickness. Irregularities in the thickness of the formed glass sheet may corrected by selective heating of the glass. A flow control plug can be inserted into the trough, such that flow dynamics can be altered during hot operation by insertion, removal or position adjustment of the flow control plug. |
