METHOD FOR MANUFACTURING GLASS SHEET, AND GLASS SHEET AND GLASS SHEET ASSEMBLY

• Main Author: NODA TAKAYUKI
• Format: Patent
• Language: Chinese; English
• Published: 07.09.2021
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; MINERAL OR SLAG WOOL; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TRANSPORTING; WELDING; WORKING BY LASER BEAM

The present invention comprises a first step for preparing a glass sheet (1), and a second step for forming a through hole (2) in the glass sheet (1). In the first step, when the through hole 2 gradually enlarges toward only one side in the sheet thickness direction, a glass sheet 1 in which the range Delta T of variation in the sheet thickness satisfies the relationship DeltaT <= (D * A/tan Theta)/200 is prepared, where Theta is the tilt angle of the inner wall surface (2a) of the through hole (2) with respect to the sheet thickness direction, and D is the minimum hole width of the through hole (2), and the condition is imposed that the range of variation allowable for the minimum hole width D is A% of the minimum hole width D. Alternatively, when the through hole 2 gradually enlarges toward both one side and the other side in the sheet thickness direction from a location in the center region in the sheet thickness direction, a glass sheet 1 in which the range DeltaT of variation of the sheet thickness satis