In the deep processing of glass, tempered glass is widely used in construction, appliances, and automotive sectors due to its high strength, safety, and heat resistance. For equipment buyers and glass factory owners, understanding the working principle of the tempered glass furnace is essential—not only for selecting the right equipment but also for assessing whether the process is reasonable and the investment worthwhile.

1. Basic Structure of the Tempered Glass Furnace

A standard tempered glass furnace typically includes:

Loading Table: smooth feeding of raw glass into the heating section

Heating Section: elevates temperature to approx. 630 °C–700 °C using electric or gas heating

Conveyor System: ceramic rollers ensure uniform heat exposure

Quenching Section / Air Flow System: high-pressure cold air rapidly cools the glass surface, forming compressive stress layers

Unloading Table: glass exits smoothly for cooling and inspection

2. Four Key Steps in Glass Tempering

Heating: Glass is heated uniformly to above its softening point (~630 °C). Key considerations include temperature uniformity and heating rate.

Soaking: Maintains temperature to equalize heat distribution, crucial for large or thick panels.

Quenching: Rapid cooling with upper and lower cold air layers, creating surface compression and internal tension that strengthen the glass.

Unloading & Inspection: Checks for quality issues such as breakage, warping, or stress imbalance.

3. Control System

Modern furnaces feature smart control systems that allow:

Automatic adjustment of temperature and air pressure

Recognition of glass thickness and type

Data logging and quality traceability

Remote monitoring and maintenance

4. Summary: Why Understanding the Principle Matters

Key selection criteria include:

Heating uniformity (radiation vs. convection)

Cooling efficiency (air flow design)

Degree of automation/intelligence in the control system

Energy efficiency and operational cost

Compatible glass thickness and specifications

Investing in the right tempered glass furnace determines product quality and factory competitiveness.

 

If you are looking for a customized tempered glass furnace solution tailored to your factory’s production capacity and glass types, feel free to contact us. With 23 years of industry-leading technology and high-value quality service, we are here to provide you with detailed technical specifications and proven case studies.