Causes of glass deformation of toughened glass

Coated glassXiaobian will share the causes of the glass deformation of toughened glass for you. I hope it can help you to understand it together:

The glass deformation of toughened glass mainly comes the following aspects:

1、 Bad flatness of glass toughened glass caused by problems in roller table

1. Deformation of heating roller table

2. The roller table is worn

3. The grid roller table is deformed

2、 Thermal deformation caused by uneven cooling

After the glass is heated to the softening point, it is cooled rapidly, sufficient compressive stress is generated on the surface of the glass. The process of producing tensile stress in the interior of the glass which is in balance with the compressive stress is the toughening of the glass. When the toughened glass is affected by the external force, the compressive stress is released first, then the tensile stress is generated on the surface of the glass, so that the strength of the toughened glass is higher than that of the ordinary glass. Toughened glass exists forever The glass with long stress will also deform when the internal stress of the glass is unbalanced: when the pressure stress on the upper surface is greater than that on the lower surface, the glass will bend downward. Similarly, when the pressure stress on the lower surface is greater than that on the upper surface, the glass will bend upward. Because the cooling speed of the upper lower surfaces is uneven, the cooling speed of the glass is fast The stress on the surface is greater than that on the surface with slow cooling rate.

3、 Thermal deformation due to uneven heating temperature

1. There is a temperature difference between the upper lower surfaces of the glass during heating

2. Glass deformation caused by temperature difference between the middle the edge

3. Random uneven temperature distribution