Quenching apparatus for glass toughening production line

Abstract

The invention discloses a quenching apparatus for a glass toughening production line. The quenching apparatus comprises a frame, a cooling mechanism and a lifting mechanism. The cooling mechanism comprises an upper cooling roller bed, a lower cooling roller bed, a driving mechanism and a liquid coolant circulation system. The lifting mechanism adjusts a gap between the upper cooling roller bed and the lower cooling roller bed by lifting and dropping the upper cooling roller bed. The driving mechanism is used for driving the upper and lower cooling roller beds to rotate so as to convey heated and to-be-quenched glass plates; and when the to-be-quenched glass plates pass through between the upper and lower cooling roller beds, the upper and lower cooling roller beds contact with the to-be-quenched glass plates, certain pressure is applied on the to-be-quenched glass plates via the gravity of the upper cooling roller bed, so quenching of the to-be-quenched glass plates is realized. The quenching apparatus has simple and practicable structure, can effectively realize quenching of ultrathin glass plates, improves cooling intensity in the process of quenching, enables cooling effect to be more uniform and reduces stress deformation of ultrathin glass.

Description

technical field [0001] The invention relates to the production of tempered glass, in particular to a quenching device for a glass tempering production line. Background technique [0002] In the prior art, physically strengthened or tempered glass sheets are mainly produced by an air quenching and tempering process in which the glass sheet is heated to just below its softening point (eg 650°C) and then cooled with air The jet is sprayed onto the surface of the heated glass plate to rapidly cool or quench the surface of the glass plate, thereby forming compressive stress on the surface and forming tensile stress inside, that is, tempering of the glass. Another known quenching method is the spray quenching process, which uses a spray of water mist on the heated glass sheet for cooling. [0003] However, the above two conventional cooling methods have great limitations when tempering thin glass plates with a thickness of no more than 3.0mm and ultra-thin glass plates. Because ...

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Problems solved by technology

[0003] However, the above two conventional cooling methods have great limitations when tempering thin glass plates with a thickness of no more than 3.0mm and ultra-thin glass plates.

Because the glass plate is very thin, the temperature difference between its center and surface is very small when cooling, so it is difficult to achieve the ideal stress gradient

At present, the common practice is to greatly increase the power or number of fans, and increase the cooling rate of the glass by increasing the wind pressure. This not only significantly increases the energy consumption cost of the production process, but also easily leads to serious wind on the surface of the glass plate. spots, and even deformation of the glass plate

Furthermore, the existing blowing cooling and spray cooling are difficult to ensure the uniformity of cooling, which will also have an adverse effect on the quality of tempered glass

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