Forced convection hardening is the upper and lower parts of the machine. This type of tempering furnace is characterized by fast heating and good optical properties of low radiation glass (the film surface will wrinkle if the heating time is too long), such as Low-E, double silver, triple silver, etc.
However, there is convection in the lower part, and the glass is easy to produce white lines or optical deformation, so the lower convection and temperature should be appropriately lower.
Convection is set in sections
for example, convection value of 0% - 30% heating double glass edger machine time ()
30% - 50% heating time ()
convection value of 50% - 80% heating time ()
convection value of 80% - 100% heating time ()
convection is divided into several sections. Whether the convection value is a percentage or a value mainly depends on the habits of Beibo engineers.
The upper convection value is from large to small, the lower convection value is from small to large, and the final value is the same to make heating uniform.
We take the percentage as an example

for the production of Low-E upper 90%, 90%, 70%, 50% lower 20%, 30%, 50%, 50%
for the production of white steel upper 60%, 60%, 60%, 60% lower 50%, 50%, 50%, 50%
for the production of thick plate white steel of 12mm and above, the minimum value is used for upper and lower convection.
The above is just an example, the method is like this, everything is based on the actual production.
Use the same value if you want to change it below 6mm, use the same value for special glass
change it for special glass
use the same value for special glass change
use the same value for special glass change
change the special glass for more than 12mm.
you should form a good habit in production, and do not change again and again, otherwise you will not know which one to use when you make too many glasses.