The physical tempering method can be divided into liquid medium tempering method, gas medium tempering method, particle tempering method, and fog tempering method. The liquid medium tempering method, also known as liquid cooling method, is the process of heating glass to a temperature close to the softening point and then placing it into a quench tank filled with liquid for tempering. Gas medium tempering method, also known as air-cooled tempering method. Including methods such as horizontal roller bed tempering, horizontal air cushion tempering, and vertical tempering, the Randy series tempering furnace uses the gas medium tempering method to toughen the original glass sheet. The particle toughening method is a process in which glass is heated to a temperature close to the softening temperature and then quenched in a fluidized bed with solid particles, usually alumina particles with a particle size of less than 200m, to enhance the glass. The fog tempering method uses atomized water as the cooling medium, and uses spray exhaust equipment to make the glass cool more evenly during tempering, with less energy consumption and better performance after tempering.
The chemical tempering method is to change the surface components of glass through chemical methods, increase the surface lamination stress, and increase the mechanical strength and thermal stability of glass. Because it enhances glass through ion exchange, it is also known as ion exchange enhancement method. According to the type of ion exchange and the temperature of ion exchange, it can be further divided into ion exchange methods below the transition point temperature, abbreviated as low-temperature method, and ion exchange methods above the transition point temperature, abbreviated as high-temperature method. The so-called physical tempering method is a production method that heats glass to a softening temperature close to that of glass, and then rapidly cools it to increase its mechanical strength and thermal stability.
Chemical tempering is suitable for tempering thin glass, glass with high precision requirements or complex shapes. Its products are mostly used for special purposes such as glasses, aviation glass, and electronic substrate glass. However, the lifespan of chemical tempered products is relatively short, usually less than 3 years, while the lifespan of physical tempered products exceeds 30 years.
