| 摘要 |
<p>A method for manufacturing a glass plate having a through-hole comprises: a dropping step for dropping a fixed amount of molten glass onto a lower die having a protruding portion that forms the outline of the through-hole; a pressing step for molding a glass surface by pressing the molten glass on the lower die by an upper die having a protruding portion that forms the outline of the through-hole such that the protruding portions face each other with respect to the lower die, and forming a thin portion corresponding to the outline of the through-hole in the molten glass between the protruding portion of the upper die and the protruding portion of the lower die; and a drilling step for forming the through-hole by cutting off glass in the thin portion. In each of the protruding portions of the upper die and the lower die, a recessed portion with a V-shaped or U-shaped section is formed, and the thin portion is formed at the outer periphery of the recessed portion.</p> |
