Flatness is one of the most critical indicators of tempered glass quality. However, in actual production, glass deformation in the tempering furnace is not uncommon. This issue not only affects the appearance and performance of the final product but also has a direct impact on customer satisfaction. The root causes of deformation typically lie in the temperature control systems during the heating and cooling processes.
- Impact of the Heating Stage
Although uneven heating during the initial stage may not directly cause visible deformation in the final product, it can negatively affect the glass’s overall flatness. Generally, if the deformation pattern of tempered glass varies continuously, the issue likely originates from the heating stage. In such cases, it’s important to examine whether the furnace temperature settings are appropriate and check for localized overheating or significant temperature differences in the heating zones.It’s also worth noting that adjustments to furnace temperature often show delayed effects. Operators should closely monitor trends during continuous production after making any temperature changes to avoid misjudgements and unnecessary repeated adjustments. - Impact of the Cooling Stage
Compared to heating, imbalances during the cooling stage are more likely to cause consistent and sustained deformation in tempered glass. This type of deformation is typically the result of uneven cooling between the upper and lower surfaces. By adjusting the ratio of air pressure and airflow between the upper and lower blowers, deformation can often be corrected effectively. Balancing the cooling airflow has a direct and often immediate impact on glass flatness. Therefore, when recurring or patterned deformation is observed, the cooling system should be the first area to inspect.
Conclusion
Controlling the flatness of tempered glass requires precise coordination of process parameters during both the heating and cooling stages. Continuously monitoring deformation trends during production and optimizing furnace temperature and cooling systems in a timely manner not only enhances glass quality but also significantly improves customer satisfaction. With extensive expertise in tempering processes and advanced control technologies, LandGlass is committed to providing customers with stable, high-performance tempered glass solutions.