Why Does Car Window Glass Have Wavy Patterns?

[McRuth]

There are two main reasons why car window glass may have wavy patterns: firstly, it may be intentionally designed by the manufacturer to enhance the aesthetic appeal of the window; secondly, it could be due to errors during the glass tempering process. The causes of tempering errors are explained below: Furnace Temperature: If the temperature inside the tempering furnace is too high or the heating time is too long, this issue can be resolved by adjusting the tempering process parameters, such as lowering the furnace temperature or reducing the heating time. Roller Deformation: If the rollers become bent or deformed, or if individual rollers exceed the standard diameter or height, the solution is to replace or adjust the roller height. Roller Rotation: If the rollers rotate or transport the glass too slowly, the issue can be addressed by appropriately increasing the rotation or transport speed. Cooling: During the cooling phase of the tempering process, the glass oscillates back and forth on the rollers of the cooling unit in the tempering furnace. If the rapid cooling temperature is too high or the air pressure is too low during this stage, it can cause the glass surface to develop wavy distortions. In such cases, the furnace temperature and heating time should be promptly reduced.