ES423517A1 - Procedure for the manufacture of slim floated glass. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

"Process for the manufacture of thin float glass", thickness less than 2.5 millimeters, according to which the molten glass is poured in free fall on the metal bath, where -in the range of viscosity up to 105.25 Poise and without intervention of lateral guide rollers - it extends freely to form a layer of uniform thickness after which, in the next section of the float bath, the glass ribbon is maintained in the plastic state and stretched by increasing its speed in longitudinal direction in which case, in this plasticity range and by rollers acting exclusively from above on the edge areas of the glass ribbon, forces are exerted on said tape which progressively control the effect of stretching the pulling force to In order to cause a gradual stretching to a prescribed thickness, characterized by the fact that, the forces acting on the glass ribbon are adjusted and controlled in such a way so that, in the scope of the free extension of the glass layer, that is as close as possible to the side walls of the float bath container, provided that a safety distance of approximately 15 centimeters maximum is maintained in the area of glass viscosity between 105,25 and 106,75 Poise, the glass ribbon does not suffer any increase in temperature, and that in the area of glass viscosity between 105,25 and 106 Poise the edges of the glass ribbon are guided by the rollers acting from above at the smallest possible distance from the side walls, in which case the decrease in the width of the glass strip in this area is less than 20%. (Machine-translation by Google Translate, not legally binding)