A mesh belt sintering furnace is a sintering equipment that uses a high-temperature resistant metal mesh belt as the conveying carrier, enabling workpieces to pass through multiple temperature zones for continuous heating, insulation, and cooling. It is a key equipment in industries such as powder metallurgy, electronic ceramics, and metal heat treatment.

I. Basic Definition and Working Principle

Definition: A mesh belt furnace is a heat treatment equipment that completes the sintering process by continuously conveying workpieces through a mesh belt under a muffle protection. It is widely used for sintering of powder metallurgy products, metal powder reduction, and pre-sintering/firing of electronic components.

Core Principle:

Workpieces enter the furnace body at a uniform speed via the mesh belt, sequentially passing through the feeding section → pre-sintering section → sintering section → slow cooling section → water cooling section → discharging section.

Each temperature zone is independently temperature-controlled (usually 6-12 temperature zones), with precise temperature control achieved through PID intelligent regulation.

The mesh belt speed is infinitely adjustable (20-200mm/min) to match different process requirements.

Protective atmosphere (H₂, N₂, Ar, etc.) and air curtain design isolate the air and maintain stable furnace atmosphere.

After sintering, workpieces are automatically discharged, enabling 24-hour continuous production and completely changing the intermittent operation mode of traditional box furnaces.

2、Core Features and Advantages

Continuous and Efficient Production: 24/7 uninterrupted operation, eliminating furnace idle time and increasing capacity by more than 30%

Precise Temperature Control: Multiple independent temperature zones for adjustable heating rates (e.g., 5℃/min), ensuring product consistency

Uniform Workpiece Heating: Mesh belt conveying eliminates the need for boat usage, reducing deformation and improving product pass rate

High Automation Level: Automatic loading and unloading, capable of integrating with preceding and succeeding processes, minimizing manual intervention

Energy Saving and Environmental Protection: Fiber module heating elements with high thermal efficiency, energy consumption 20-30% lower than traditional furnaces

Convenient Maintenance: Modular design allows heating element replacement without furnace shutdown, reducing maintenance costs

Strong Process Adaptability: Configurable RBO degreasing system to meet special process requirements such as powder metallurgy

3、Typical Application Fields

Powder Metallurgy Industry: Sintering of iron-based/copper-based structural parts, bearings, gears, clutch plates, and bushings.

Electronic Ceramic Industry: Firing of piezoelectric ceramics, resistors, capacitors, and inductive components; silver paste firing for thick film circuits.

Metal Heat Treatment: Reduction of metal powders, annealing of steel strips, and quenching and tempering of small parts.

New Materials Field: Sintering of magnetic materials, precision ceramics, high-temperature alloys, and fuel cell materials.

Other Applications: Manufacturing of electronic components such as glass insulators, circuit tube shells, and crystal oscillator elements.

4、Selection and Application Guidelines

Select temperature based on material: Powder metallurgy selects around 1000°C, hard alloy selects above 1400°C, electronic ceramics selects 800-1000°C.

Mesh belt material matching: For general high temperature, select 310S stainless steel; for ultra-high temperature (>1200°C), special alloy mesh belts can be selected.

Atmosphere selection:

Powder metallurgy: Ammonia decomposition gas or hydrogen-nitrogen mixed gas (to control carbon potential).

Electronic ceramics: Air or nitrogen.

Metal reduction: Pure hydrogen or high-hydrogen mixed gas.

Process customization: Select models with RBO system for degreasing process; select multi-point temperature control models for high precision requirements.

Conveyor belt sintering furnaces, with their technical advantages of continuous operation, automation, and precise temperature control, have become mainstream equipment in modern industrial heat treatment. They are particularly widely used in the fields of powder metallurgy and electronic ceramics. Their core value lies in significantly improving production efficiency, ensuring product quality consistency, and reducing comprehensive costs, making them one of the key equipment for the transformation and upgrading of manufacturing industries.