GLASS PLATE MANUFACTURING METHOD AND GLASS PLATE MANUFACTURING DEVICE

摘要

A glass plate manufacturing method comprises: a melting step for melting a glass starting material to obtain molten glass; a forming step for supplying the molten glass to a forming body provided in a forming furnace to form a glass ribbon and creating the flow of the glass ribbon; a slow cooling step for drawing the glass ribbon by a roller provided in a slow cooling furnace and cooling the glass ribbon in the slow cooling furnace; a glass ribbon cutting step for cutting the cooled glass ribbon in a glass ribbon cutting space; and an edge portion cutting step for cutting, in an edge portion cutting space, edge portions formed respectively at both ends in the width direction of the cut glass ribbon. The atmospheric pressure in the glass ribbon cutting space and/or the edge portion cutting space is adjusted such that the atmospheric pressure in the glass ribbon cutting space is higher than the atmospheric pressure in the edge portion cutting space.