The physical tempering method commonly used in glass tempering furnaces nowadays is to heat the glass to the softening point. At this time, the glass can still maintain its original shape, but the particles in the glass have the function of relocation, and structural adjustments are made to quickly eliminate the internal stress. Then, the tempered glass is blown and suddenly cooled. When the temperature is balanced, the outer surface of the glass produces corresponding strength compressive stress, and the inner layer also produces corresponding tensile stress. That is, the glass produces a uniform and regularly distributed internal stress, which improves the tensile strength of the glass as a brittle material, thereby improving the bending and impact resistance of the glass.
At the same time, due to the existence of uniform stress inside the glass tempering furnace, once the glass part is subjected to an impact that exceeds its strength and cracks, it will self explode into small particles under the effect of internal stress, improving its safety. Therefore, tempered glass can also be called prestressed glass or safety glass.
Generally speaking, the glass tempering furnace uses high-density Ceramic fiber boards and special shaped parts, combined with the use of insulation anchor fixation, to solve the problem of thermal short circuits. Through the selection of high-quality Ceramic fiber boards and the use of new technologies, the insulation effect of the tempering furnace has become more obvious. Zhuqing company supplied ceramic fiber special shaped parts more than 800 units of tempering furnace in 2023, more experience to support tempering furnace insulation design.
product key technologies
Ceramic fiber board with inorganic binder
ceramic fiber special shaped parts
Complex shape capability
At room temperature, the outer surface temperature of the tempering furnace does not exceed 50 ℃. Even if there is a power outage, the insulation can continue for half a time. However, the temperature drop of the glass tempering furnace body is only 150 ℃, and it can reach the set temperature after 30 minutes of heating.
In use, the tempering furnace should follow the temperature setting mode where the upper set temperature is 5 ℃ -10 ℃ higher than the lower set temperature, and the middle set temperature is 5 ℃ -10 ℃ lower than the two ends. This can ensure that the temperature difference between the glass discharged from the furnace in the effective heating area is around 5 ℃, fundamentally ensuring the uniformity of the heated glass.