Method of quenching glass sheets
AssigneeNippon Sheet Glass Co., Ltd.
InventorsSeiichiro Honjo, Masaaki Ijichi, Hiroaki Masunaga, Keiji Hara
Life of this patent
Estimating the term…
Abstract
While a heated glass sheet moves through a quenching section, the glass sheet is blown with air in the same portions so as to be quenched always in the same portions to provide on the glass surface rapidly cooled portions and uncooled portions. Thereby the residual strains on the glass surface are made different to prevent the generation of pieces or splines when the glass sheet is broken.
Claims5
A method of quenching glass sheets characterized in that a heated glass sheet is moved through a quenching section, is blown with air in some portions from a plurality of nozzles during said movement so as to provide rapidly cooled portions and uncooled portions;
- wherein the air is intermittently jetted out of nozzles arranged as opposed to the entire glass sheet moving area in said quenching section, and the air jetting nozzles through which the air is jetted out are opened and closed in turn by advancing baffles so as to coincide with the moving speed and moving direction of said glass sheet by synchronizing said intermittent jetting of air with the movement of said glass sheet to provide, on the glass sheet surface, portions blown with air and portions blown with no air alternately in the glass sheet advancing direction;
- and
- wherein the synchronizing of the jetting is provided by a chain driving the advancing baffles and running in unison with the advancing glass sheet.
A method of quenching glass sheets characterized in that a heated glass sheet is moved through a quenching section, is blown with air in some portions from a plurality of nozzles during said movement so as to provide rapidly cooled portions and uncooled portions;
- wherein the air is intermittently jetted out of nozzles arranged as opposed to the entire glass sheet moving area in said quenching section, and the air jetting nozzles through which the air is jetted out are changed in turn so as to coincide with the moving speed and moving direction of said glass sheet by synchronizing said intermittent jetting of air with the movement of said glass sheet to provide, on the glass sheet surface, portions blown with air and portions blown with no air alternately in the glass sheet advancing direction;
- and
- wherein endless running belts provided with a plurality of baffle members for closing said air nozzles are provided so as to be able to run in the same direction and at the same speed as the glass sheet to close the nozzles in turn with said baffle members and to intermittently jet air out of the nozzles through between said baffle members.
Dependencies are inferred from the claim text.