Heating device used for glass tempering

Abstract

The invention discloses a heating device used for glass tempering. The device includes a roller track furnace and an air flotation furnace; the roller track furnace and the air flotation furnace are arranged adjacent to each other from front to back, and an outlet of the roller track furnace is connected with an inlet of the air flotation furnace; an air floatation platform is disposed inside theair flotation furnace, the air floatation platform is separately provided with a set of direct injection holes and oblique injection holes, the direct injection holes are vertically upward, and the oblique injection holes are inclined upward toward a glass forward direction; the oblique injection holes are arranged to be two rows, the two rows of oblique injection holes are symmetrically distributed on both sides of the transverse center line of the air floatation platform, and the spacing between the two rows of oblique injection holes is smaller than the width of a to-be-heated glass plate;the direct injection holes and the oblique injection holes together form a rectangular array; and the air floatation platform combining the direct injection holes and the oblique injection holes is adopted, air flow provided by the direct injection holes is used for supporting glass suspension and heating, the air flow provided by the oblique injection holes is mainly used for driving glass to advance, so that the glass plate is not in contact with any mechanical driving device during heating and conveying processes of the air floatation furnace, and the surface quality and the side edge quality of the glass are ensured.

Description

technical field [0001] The invention relates to the technical field of glass tempering equipment, in particular to a heating device for glass tempering. Background technique [0002] The method of manufacturing tempered glass is: firstly heat the glass to a certain temperature (exit temperature) in the heating furnace, then the high-temperature glass is quickly (exit speed) out of the furnace, and then enters the quenching chamber for quenching. [0003] The heating furnace is usually a roller furnace or an air flotation furnace. For the heating furnace, there are roller tables inside, and electric heating wires are arranged on the upper and lower sides of the roller tables. The glass is conveyed and heated on the roller tables. The surface quality of the glass is greatly affected by the roller table, especially when heating thin glass with a thickness of less than 3mm, the glass is easy to wave and deform, and obvious roller marks will be formed on the lower surface. [0...

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Problems solved by technology

[0006] At present, both the roller furnace and the air flotation furnace use a mechanical device to contact the glass to drive the glass. When the high-temperature glass is out of the furnace, the speed of the furnace must be achieved by increasing the speed of the driving device. This limits the further improvement of the furnace speed and temperature, which directly leads to the limitation of the improvement of the tempering strength.

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