tempered glass for induction cooker

How is Glass Bent?

With technological developments and innovations, the glass industry has improved the process of bending glass over many years. The main technologies involved in the glass bending process are:

Bending and tempering – In this type of thermal bending, glass is first heated to extremely high temperatures and bent in the bending station, based on the desired radius (usually ¼ of a circle). It is then rapidly cooled to complete the tempering process. Angling the glass can help achieve bidirectional bending, which is lengthwise and crosswise. A bent glass that is tempered offers excellent strength and durability, solar control, and thermal insulation. It also acts as a safety glass and is cheaper to produce.

Hot bending – Also known as gravity bending, molds are used in this technology. The molds along with the glass are heated to around 600°C, mostly in an electric furnace. The glass is bent in the desired shape and gradually cooled in the annealing process.

Cold bending – This type of bending is done under normal temperatures where the glass has already been tempered. Therefore, the degree to which the glass is bent is very less. The glass is first put inside a frame and mechanically bent to the required frame shape. The bent glass is then screwed or glued to the laminate frame before it can be installed. Cold bending offers the distinct advantage of higher optical quality. However, it is subject to a lot of bending stresses.

Lamination bending – In this, the hot and cold bending processes are combined along with lamination. First, the required glasses are bent. Then during the autoclave process, a thick interlayer is placed between the bent glass sheets. Though this method is expensive, flexible shapes can be produced.

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