Some advice from LandGlass if you find chipped corners on a thick glass plate during the glass tempering process.
- In the heating process, if the glass is unevenly heated in the glass tempering furnace, the glass warps and form a spherical surface. It may result in its edges and corners being chipped when colliding with the ceramic roller conveyor during oscillating movement. To prevent it from happening, you can either reduce the furnace temperature of the upper part, increase the furnace temperature of the bottom part, reduce the heat balance pressure, or decrease the top convection blower speed to maintain the glass flatness during the heating process.
- If the entry speed of glass into the furnace is too fast or the oscillating speed of glass in the heating furnace is too fast, it may cause the glass to collide with the ceramic roller in the heating furnace. At this time, you may modify the tempering process parameters to reduce the entry speed of glass or the oscillating speed of glass in the furnace to prevent the glass from bumping into the roller while maintaining its flatness.
- When the level of the ceramic roller conveyor in the heating furnace is not adjusted properly, the glass in the heating furnace may easily collide with the ceramic roller. At this time, you should use a level ruler to readjust and calibrate the level of the ceramic roller conveyor, so that all the ceramic rollers are on the same level.