PROCESS FOR PRODUCING GLASS BAR

摘要

A process for glass bar production which comprises a heating/drawing step in which a base sheet glass is heated and softened in a heating furnace and drawn into a desired thickness to form a glass bar, wherein in the heating/drawing step, the base sheet glass is heated so that the sheet glass has a valley-shaped temperature distribution curve in the width direction. This can be accomplished by heating with, for example, a heater comprising a non-heating part located in a position corresponding to the width-direction center of the base sheet glass and a heating part disposed at each side of the non-heating part. Due to this, when a base sheet glass is heated and softened in a heating furnace and drawn into a desired thickness to form a glass bar, a thin rod-form glass bar having excellent flatness can be produced.