METHOD FOR FINISHING EDGE OF PLATE GLASS

摘要

PURPOSE: To improve the edge strength of a glass plate by polishing the end surface of a plate glass into a curved surface shape which projects outward, and finishing the boundary part between the curved surface part of the end surface and the flat surface parts on the front and back sides of the glass smoother than the curved surface part. CONSTITUTION: A curved surface part 3a projecting outward is polished on the end surface of a plate glass 3 by using the outer peripheral surface of a cylindrical wheel 10 to be rotated around its shaft core. A polishing part finer than the abrasive of No.200 is formed on the outer peripheral surface of the cylindrical wheel 10, and irregularities in the front surface of the curved surface part 3a is finished into about 0.03. Next, the boundary part 3c between the curved surface part 3a and the flat surface parts 3b is buff-polished by using the outer peripheral surface of the polishing belt 11 to be rotated. Polishing by the polishing belt 11 is performed by sufficiently pouring aqueous solution of cerium oxide on the part to be polished, and the surface roughness is finished to a fewμm.