The stress uniformity of tempered laminated glass is critical to its safety and reliability. The following are ways to improve stress uniformity by improving the tempering process.
First, optimizing the heating process is the key. Using advanced heating equipment, such as a zoned temperature-controlled heating furnace, can ensure that the glass is heated evenly during the heating stage. By accurately controlling the temperature of different areas, local overheating or overcooling can be avoided, so that the structure inside the glass can expand evenly during heating, laying a good foundation for subsequent tempering treatment.
Secondly, during the tempering cooling process, adjust the design and parameters of the cooling air grille. The air outlet distribution of the air grille should be more reasonable so that the cooling air can blow evenly on the glass surface. At the same time, accurately control the pressure, flow rate and temperature of the cooling air to ensure that the temperature gradient on the surface and inside of the glass changes evenly during the rapid cooling process, avoiding stress concentration due to uneven cooling. For example, a variable frequency speed-adjusting fan is used to accurately adjust the flow rate of the cooling air, and dynamically adjust it according to the size and thickness of the glass.
Furthermore, improve the pretreatment process of the glass. Before tempering, the glass is finely ground and polished to remove tiny surface flaws and stress concentration points, making the glass surface smoother. In this way, during the tempering process, the stress can be more evenly distributed inside the glass, reducing the stress unevenness caused by surface defects.
In addition, advanced stress detection technology is introduced to monitor the tempering process in real time. Laser interferometry and other means are used to timely detect the distribution of stress inside the glass and feedback it to the control system. According to the test results, the heating, cooling and other process parameters are adjusted immediately to ensure that the stress uniformity is always in an ideal state.
From the perspective of production equipment, the automation and accuracy of the tempering furnace are improved. The automated system can more accurately execute the preset process parameters, reduce process fluctuations caused by human factors, and thus improve the stability and consistency of the stress uniformity of each batch of tempered laminated glass.
New tempering process methods can also be explored, such as a composite tempering process that combines chemical tempering with physical tempering. Chemical tempering can form a more uniform compressive stress layer on the glass surface, complementing physical tempering, further optimizing stress distribution, improving stress uniformity, and improving the overall performance of glass.
By optimizing the heating and cooling process, improving the pretreatment process, introducing real-time detection technology, improving the degree of equipment automation, and exploring new process methods, the stress uniformity of tempered laminated glass can be effectively improved, providing more reliable quality assurance for its wide application in construction, automobiles and other fields.
