The Automotive Windscreen Manufacturing Procedure


Glass is made up of several oxides that fuse and react with 1 an additional upon heating to create a glass. These incorporate silica, sodium oxide, and calcium oxide. Uncooked substances from which these elements are shaped are sand, soda ash, and limestone. Soda ash functions as a flux set merely, it lessens the melting position of the batch composition. Lime is extra to improve the hardness of the glass. Glass developed for windscreens also have several other oxides: magnesium oxide, potassium oxide and aluminium oxide.

The Procedure

The raw elements are weighed in the right quantities and blended with a smaller amount of money of h2o. After made, it will be fed to a substantial tank for melting, utilizing the float glass procedure. Initially, the batch is heated to a molten state, and then it will be fed into a tank recognized as the float chamber, which is made up of a bath of molten tin. At its entrance, the temperature of the tin is about one,835 degrees Fahrenheit, even though at the exit the tin’s temperature is a little cooler one,one hundred fifteen degrees Fahrenheit. In the float chamber, the glass does not submerge into the tin but floats on prime of it, relocating by the tank as even though on a conveyor belt. The beautifully flat floor of the tin triggers the molten glass also to become flat, even though the significant temperatures clean up the glass of impurities. The reduced temperature at the exit of the chamber makes it possible for the glass to harden ample to transfer into the up coming chamber. Right after the glass exits from the float chamber, rollers select it up and feed it into a furnace referred to as a Lehr. In this furnace, the glass is cooled little by little to about 395 degrees Fahrenheit, after the glass exits the Lehr, it cools to place temperature. It is now quite tough and powerful and prepared to be slash.

Slicing and Tempering

The glass is slash using a diamond scribe. Diamond is used simply because it is more durable than glass. Following, the slash piece have to be moulded into condition. The sheet of glass is placed into a metal mould. The glass crammed mould is then heated in a furnace to the position in which the glass shapes to the mould.

Right after this shaping action, the glass have to be hardened in a heating action referred to as tempering. First, the glass is heated to about one,565 degrees Fahrenheit, and then blasted with jets of cold air, this approach toughens the glass. This makes it possible for the car glass, when harmed, to crack into several smaller items of glass with no sharp edges.


In this approach, two sheets of glass are bonded collectively with a layer of plastic. The lamination will take place in an a exclusive oven. The plastic layer is normally tinted to act as an ultraviolet filter. When laminated glass is damaged, the damaged items of glass continue being bound to the tear resistant plastic layer, and the damaged sheet continues to be clear. Unlike standard basic safety glass, laminated glass can be additional processed


Right after laminating, the windscreen is prepared to be assembled with plastic moulds so it can be fitted. Acknowledged as encapsulation, this assembly approach is normally done at the glass company. First, the windscreen is established in a mould. Following, molten plastic is injected into the mould, when it cools it kinds a plastic frame all over the glass. The windscreen is then shipped to the auto company, in which it is fitted to a car or truck. The set up is done by a approach that works by using a polyurethane adhesive to bond the windscreen to the vehicle’s human body.

High quality Handle

This action involves testing of raw elements and examining melting temperature. As the glass is made, exclusive products are used to glance for flaws in the glass. Other computerized products have been designed to measure dimensions and radius of curvature after the windscreen has been shaped.

Protection glass used in windscreens have to satisfy selected technical specs pertaining to qualities these kinds of as influence resistance, and power. Protection benchmarks have been designed to ensure the high-quality of the glass.

Post time: 01-15-2017