+86 18737971827 396041848@qq.com

Home News

What is the process of tempering flat glass tempering furnace?
11 Jun. 2024

What is the process of tempering flat glass tempering furnace?

A flat glass tempering furnace is a specialized industrial machine used to heat and cool flat glass sheets in a controlled manner, enhancing their strength and safety properties. Here’s an overview of the process and key features:

Overview of the Tempering Process

flat glass tempering furnace


The glass sheets are heated to a temperature of approximately 620-680 degrees Celsius (1148-1256 degrees Fahrenheit), which is near the glass's softening point.

The heating is done uniformly to ensure even temperature distribution across the entire glass sheet.


After reaching the desired temperature, the glass is rapidly cooled using high-pressure air jets.

The rapid cooling causes the surface of the glass to solidify quickly while the interior remains slightly warmer and more fluid for a short time.

This process creates compressive stresses on the surface and tensile stresses in the interior, giving the tempered glass its strength.

Key Features of a Flat Glass Tempering Furnace

flat glass tempering furnace

Heating Section:

Usually consists of electric heating elements or gas burners.

Equipped with precise temperature control systems to maintain uniform heating.

Quenching Section:

Comprises a series of air nozzles that blow high-pressure air onto the heated glass.

Designed to cool the glass rapidly and uniformly.

Conveyor System:

Transports the glass sheets through the heating and quenching sections.

Made of materials that can withstand high temperatures and mechanical stress.

Control System:

Advanced computer systems control the entire process, ensuring precise temperature management and air flow.

Often includes sensors and feedback mechanisms to monitor and adjust parameters in real time.

Safety Features:

Safety interlocks and emergency shutdown systems.

Protective barriers and insulation to prevent accidental contact with hot surfaces.


Architectural Glass: Used in buildings for windows, facades, and glass doors.

Automotive Glass: Windshields, side windows, and rear windows.

Furniture and Appliances: Glass tops for tables, shelves, and doors for appliances like ovens and refrigerators.

Advantages of Tempered Glass

flat glass tempering furnace

Increased Strength: Tempered glass is approximately four to five times stronger than standard annealed glass.

Safety: When broken, it shatters into small, blunt pieces rather than sharp shards, reducing the risk of injury.

Thermal Resistance: Better withstands thermal stresses and temperature variations.


Size Limitations: The size of the furnace determines the maximum dimensions of the glass that can be tempered.

Edge and Surface Quality: Proper handling and processing are crucial to maintaining the quality and strength of the tempered glass.

Overall, flat glass tempering furnaces are essential for producing high-strength, safe glass products used in various industries.