Spray toughening of tempered glass

Spray toughening of tempered glass
Using atomized water as cooling medium, and using spray and exhaust equipment, the glass can be cooled more evenly, less energy consumption and better performance after toughening. Spraying exhaust apparatus is composed of a plurality of parallel connected and arranged on base of latticed drum structure, each barrel is composed of a bottom plate, baffle, nozzle and several vent holes. It is similar to the gas method, but the cooling medium used is not the air, but the atomization water. It is characterized in that the glass is tempered with atomized water as the cooling medium. The specific heat of water is larger, and the heat of the gasification of water in all liquids is also very high. During the toughening process of glass, water mist is continuously sprayed onto the surface of heated glass, and the atomized water with fine particles rapidly absorbs heat to become 100 degrees of water, and then regasification, which utilizes the specific heat of water and the high heat of gasification. A large amount of heat on the glass surface is taken away instantaneously, which makes the glass mirror hardening and tempering, resulting in long-term compression stress on the glass surface, thus improving the tensile ability of the glass and making the glass tempered. (water atomized water) by compressed air blowing method, steam injection method or hydraulic spray method spray to the glass mirror surface heating, the atomized water exposed to the hot glass after rapid expansion and endothermic gasification, if its free diffusion. It will affect the glass uniform cooling, easy to make glass burst. To this end. It is necessary to design a unique spray exhaust equipment, so that the vaporized and expanded water can be removed in place. It will not spread along the surface of the glass.
Advantages and disadvantages of fog toughening: cooling medium is easy to get, low cost, no pollution to environment, and can also temper thin steel which can not be tempered by common gases, liquids and particles. But the uniformity of cooling is more difficult to control. Application scope: because of its cooling system is more difficult to control, the application is less.

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