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Technical Data

What should we do if white haze occurs during glass temping process?

Source: LandGlass  Attention: 256  Published: 2018-03-28

Longitudinal white haze occurring in the middle of the glass panels:     

 Reasons:  

1、The level of the equipment’s roller bed is poor.

2、Radial runout of the ceramic roller bed.

3、The heat balance is not enough.

4、Low temperature in the upper part of the convection furnace.

5、The speed of the glass oscillation inside the furnace is too fast.      

6、High temperature in the bottom part of the radiation furnace.               

7、Check whether the O-shape belt is slipping.               

8、Check whether the main shaft coupling keyway is damaged.                                                   

Measures: 

1、Check the equipment’s level.

2、Check for the radial runout of the ceramic roller bed. (the bearing seat is filled with high-temperature lithium 

lubricating grease) 

3、Appropriately switch on a higher heat balance pressure and operating time.

4.  Increase the speed of the convection blowers above the convection furnace.

5、Lower the speed of the glass oscillation inside the furnace.

6、Lower the temperature in the lower part of the radiation furnace.

7、Check whether the O-shape belt is loose or slipping away.

8、If there is any damage, initiate repair or replace with a new one.

 Transverse white haze occurring at both ends of the glass:

  Reasons: 

1、The temperature difference between the upper part and the lower part of the furnace is too large.               

2、(Radiation furnace) Excessively large heat balance pressure and operating time.                        

3、(JetConvection furnace) Excessively high rotating speed of the convection blowers in the upper part of the furnace.

4、The temperature in the bottom part is set too low.

Measures: 

1、Control the temperature difference between the upper and lower part of the furnace within 10℃.

2、(Radiation furnace) Appropriately reduce the heat balance pressure and operating time.

3、(JetConvection furnace) Appropriately lower the rotating speed of the convection blowers in the upper part of the 

furnace.

        4、Appropriately increase the temperature in the bottom part.