METHOD OF MAKING SHEET GLASS FROM GLASS CYLINDER Russian patent published in 2010 - IPC C03B23/04 

FIELD: chemistry.

SUBSTANCE: invention relates to making sheet glass from hollow glass cylinders. Two arbors in form of rods are put into the cylinder. The glass cylinder is suspended horizontally on the first and the second arbor is placed freely on the inner surface of the glass cylinder along its edge using a weight P_ar. Heating is carried out until achieving plastic state of the glass cylinder and then held in that state until the distance between the arbors increases to a given length L_{op zad} due to plastic deformation of the glass cylinder. Heating of the deformed glass cylinder with arbors is stopped and after cooling to solid state of the deformed glass cylinder, flat sections are cut. The value of the given distance between arbors L_{ar div} and the value of the weight of the second arbor P_ar satisfy the conditions: where d_i is the inner diametre of the glass cylinder; d_ar is the diametre of the first and second arbors; P_c is the weight of the glass cylinder; P_crit is the critical value of the weight of the second arbor at which the glass cylinder breaks down in the solid state of the glass.

EFFECT: increased transparency of the glass sheet and its flatness.

4 cl, 4 ex, 6 dwg