5 Practical Skills to Improve Glass Tempering Process
In the glass deep processing industry, the tempering process is the core link that determines the strength, safety and flatness of glass, directly affecting the product qualification rate and market competitiveness. In daily production, many easily overlooked operational details are often the key to causing glass tempering defects. Combining front-line production experience, this article shares 5 practical and actionable skills from the dimensions of heating control, environmental adaptation, and special-shaped glass treatment, helping enterprises efficiently improveglass tempering quality and reduce losses.
1. Stage-by-stage temperature control to eliminate uneven heating.
The heating of the glass tempering furnace must follow the two-stage principle of "rapid heating + uniform heat preservation" to avoid glass warping and insufficient strength caused by excessive local temperature difference. In actual operation, the heating curve should be reasonably set according to the thickness and specification of the glass: first, quickly raise the temperature inside the furnace to the standard range, then switch to the heat preservation stage to ensure that all parts of the glass are heated evenly, laying a foundation for the subsequent cooling link.
2. Adapt to ambient temperature and optimize air pressure and cooling parameters.
The external ambient temperature has a significant impact on the glass tempering effect. Especially in winter or low-temperature workshops, low ambient temperature will change the stability of air pressure and prolong the cooling time. At this time, the air pressure and blowing time can be appropriately reduced, which not only ensures that the glass cools and forms quickly to reach the standard tempering strength, but also reduces energy consumption, achieving a win-win situation of energy saving and quality improvement.
3. Extend heating time for drilled/slotted glass.
For special-shaped glass with holes or slots, the heat conduction path is damaged, and the local thickness difference is large, which is prone to problems such as insufficient heating and cracking. In actual operation, it is necessary to increase the heating time by 2.5% to 5% on the basis of the heating time of ordinary glass of the same specification, ensuring that the holes, slots and the entire glass are heated evenly and avoiding defects.
4. Scientific placement and temperature control for glass with sharp corners.
When the angle of the glass sharp corner is less than 30°, heat tends to concentrate at the sharp corner, leading to local overheating, deformation and cracking. The heating time can be appropriately shortened; when placing, the sharp corner should be facing the tail of the furnace, and a small amount of wasteglass should be placed near the sharp corner as a heat buffer to slow down the heat absorption speed of the sharp corner and avoid warping and damage.
5. Adjust heating and air pressure strategies for patterned glass.
The surface texture of patterned glass will hinder heat conduction, easily causing uneven heating. In actual operation, it is recommended to place the uneven surface of the patterned glass upward, and adjust the heating time and air pressure parameters according to the thickness of the thickest area of the glass, ensuring that the overall tempering effect of the glass is consistent, taking into account both strength and flatness.
The above skills are suitable for front-line production scenarios. There is no need for large-scale equipment modification; only standardizing operational details can effectively improve the quality of tempered glass, reduce production losses, and help enterprises consolidate their product advantages in the fierce competition.
