The bell-type sintering furnace is designed for cyclical high-temperature sintering operations and features a turret equipped with either a hydraulic scissor system or a screw lifting mechanism from Taiwan. It is suitable for sintering products such as zirconia ceramic ferrules, ceramic filters, and cellphone casings.
Bell-type sintering furnace features:
1. Temperature control system
Temperature is regulated by a PID intelligent control system with 30 programmable automatic heating processes. Operation is managed via a 7-inch Kunlun Winton touch screen that dynamically displays the heating curve. The built-in paperless recorder allows for easy access, inquiry, and storage of historical heating data, supporting the optimization of industrial processes.
2. Heat insulation system
The furnace uses high-quality silicon carbide rods as heating elements, offering long service life and easy replacement and maintenance. Its construction includes premium polycrystalline alumina fiber for effective thermal insulation. Featuring a double-shell, air-cooled design, the furnace has an attractive appearance and maintains a surface temperature that remains cool to the touch.
3. Car control system
The material car employs a double-car cycle for loading operations, featuring controlled track access. It uses a hydraulic lift for smooth entry into the heating furnace, and its bottom is equipped with a bearing plate design to facilitate convenient slag removal.
4. Intake exhaust system
The intake air valve regulates protective gas flow into the furnace, while exhaust gases are vented through the furnace’s top exhaust outlet. The roof exhaust valve is manually operated to control the exhaust rate, and an external float flow meter monitors the gas inlet.
5. Temperature measurement system
Temperature measurement is achieved using an S-type platinum-rhodium thermocouple with an armored connection, ensuring extended service life.
Working principle
The operation of a bell furnace primarily relies on two heating techniques: electric and gas heating. In the electric heating approach, electrical energy is transformed into heat via resistance coils or electric elements to warm the material. Alternatively, the gas heating method produces high-temperature combustion gases from fuel burning, which deliver heat to the furnace contents. Both methods enable precise control over temperature and duration, facilitating processes such as sintering, heat treatment, or heat sealing within controlled high-temperature conditions.
Advantages and characteristics
Temperature uniformity: The bell furnace maintains precise regulation of temperature and atmosphere, guaranteeing consistent temperature distribution throughout the material’s heating and cooling phases.
High quality products: By accurately regulating both the heating temperature and duration, the bell furnace is capable of delivering superior quality products.
Energy saving and environmental protection: The bell furnace utilizes an efficient heating system combined with advanced insulation, minimizing energy use and heat loss, thereby supporting energy-saving and environmentally friendly principles.
Good process repeatability: The bell furnace’s control system is capable of simulating extended sintering processes, guaranteeing consistent stability and uniformity in product quality.
Structural characteristics
Control System: The bell furnace features a sophisticated temperature control system that continuously monitors and adjusts the internal temperature in real time, ensuring precise and stable heating conditions.
High temperature environment: The bell furnace’s interior is capable of achieving elevated temperatures, fulfilling the requirements of diverse sintering and heat treatment applications.
Furnace body lifting design: The furnace body of the bell jar furnace can be raised and lowered similarly to a bell jar, easing material handling and minimizing the risk of physical damage during loading and unloading.
Insulation performance: The working chamber of a bell furnace is typically constructed from high-temperature resistant materials and includes an insulation layer to minimize heat loss and enhance heating efficiency.
Application scope
Bell type furnaces are extensively utilized in research and small-scale manufacturing environments, including universities, research institutions, and industrial and mining sectors. Their primary applications include sintering magnetic materials and electronic ceramics, as well as heat treatment of sintered ceramics, stone tools, soft ceramics, and other related products.
Owing to its distinctive lifting furnace body design and accurate control system, the bell furnace is essential in applications demanding precise regulation of the heating process.
Bell-type sintering furnace main purposes:
The 1400℃ lifting double cart bell furnace is designed for heat treatment of metal materials, electronic components, powder metallurgy, magnetic materials, and other products undergoing shaping, pre-burning, firing, quenching, and tempering. It is suitable for university laboratories, as well as industrial and mining enterprise labs, supporting chemical analysis, physical testing, and processes such as sintering and melting of metals and ceramics.
