Temperature control is paramount in the processing of glass in a glass tempering furnace. Generally, it is required to heat the glass uniformly. How to achieve uniform heating in a glass tempering furnace is the main topic we will cover today.

The Impact of Surface Temperature Difference on Glass Forming Effects

To avoid the impact of temperature differences between the upper and lower surfaces of glass on the tempering effect, excessive temperature differences can easily cause the glass to become uneven, deform, or even shatter. During the production process, we must ensure the following two points: Firstly, the layout of glass placement and the interval time between each batch of glass must be uniform; secondly, to maintain the uniformity and consistency of the roller temperature and to prevent the roller temperature from being too high between glass plates, if there is a gap in the longitudinal direction during placement, this gap should be filled when placing the next batch of glass.

2. Temperature Control

Upon entering the furnace, the glass should be heated by increasing convective heating methods, activating the upper and lower heat balance. Through the high-temperature air circulation system within the furnace, the high-temperature air is circulated, effectively addressing the issue of significant temperature differences across the glass.

During the latter half of the heating process, the temperature differences between various points of the glass are not significant. The focus should be on increasing the heating speed, and the thermal equilibrium of each section can be turned off until the glass temperature matches the set furnace temperature, at which point the heating process is complete.

3. Provide thermal balance pressure

If encountering convex and concave phenomena along the glass edges, we can address control from two aspects. First, we can increase the thermal equilibrium pressure within the furnace and enhance heat convection, thereby adjusting the internal thermal equilibrium to reduce the temperature gap between the center and edges of the large glass surface. Second, we can appropriately extend the heating time for the glass, which will also decrease the temperature difference between the center and the edges of the glass.