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China Suppliers Factory for Low Temperature Continuous Tunnel Furnaces for Thin Film Products

Tunnel furnaces designed for thin film products are essential for manufacturers in China looking to enhance production efficiency and product quality. These furnaces must use corrosion-resistant materials, advanced heating methods, and precise temperature control to align with industry standards for throughput and environmental sustainability. When selecting a model, consider your production requirements, budget constraints, and the capabilities of suppliers, paying close attention to the materials used, heating technologies, and environmental protection features. After-sales service is also crucial. In the future, energy conservation, standardization, and environmentally friendly upgrades will be pivotal trends within the factory and manufacturing sectors. Choose a reliable supplier in China to ensure you stay ahead in this evolving industry
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    Technical Parameters

    Structure and Operation Principle

    Core Structure

    Furnace

    Constructed of high-temperature-resistant stainless steel (such as SUS310S) or welded carbon steel, with internal insulation panels (such as ceramic fiber modules) and air distribution plates. Air inlets and temperature control devices are located at the top and bottom, and heating devices (electric, gas, or steam) are installed on the side walls. Air outlets and exhaust devices are located at both ends.

    Conveyor

    • Teflon mesh belt: High-temperature resistant (above 250°C), anti-stick, and wear-resistant, suitable for materials prone to adhesion, such as films.
    • Stainless steel mesh belt: Made of 304/310S, high-temperature and corrosion-resistant, suitable for high-temperature environments.

    Heating System

    • Electric heating: Infrared heating tubes or resistance wires provide fast heating and uniform temperature, suitable for high-precision requirements.
    • Gas heating: Low cost, but requires exhaust gas treatment facilities such as dust collectors, desulfurization and denitrification equipment.
    • Steam heating: Requires boiler support, has a moderate cost, and is suitable for companies with a steam source.

    Temperature Control System

    • Sensor: Thermocouples or infrared thermometers monitor temperature in real time.
    • Control Algorithm: PID control combined with fuzzy control dynamically adjusts heating power and conveyor speed.
    • Execution Layer: Temperature stability is achieved by adjusting steam flow, fan speed, or gas valves.
    Workflow
    The film enters the oven via a conveyor belt. The heating system generates hot air or radiant heat, which exchanges heat and moisture with the film, evaporating moisture. An exhaust device removes moisture. Some designs use fans to accelerate air flow, improving drying efficiency. The cooling section uses natural cooling or fans to reduce temperature, ensuring that the film meets winding requirements after exiting the oven.
    Frequently Asked Questions
    What materials are used for the furnace construction and insulation?
    The furnace is constructed using high-temperature-resistant stainless steel (such as SUS310S) or welded carbon steel. For insulation, it features internal panels like ceramic fiber modules to maintain temperature efficiency.
    Which type of conveyor belt is suitable for film materials prone to adhesion?
    A Teflon mesh belt is ideal for materials prone to adhesion, such as films. It is high-temperature resistant (above 250°C), anti-stick, and wear-resistant.
    What are the differences between the heating options?
    Electric heating uses infrared tubes or resistance wires for fast, uniform, and precise heating. Gas heating offers a lower cost but requires exhaust gas treatment (dust collectors, desulfurization, etc.). Steam heating is moderately priced but requires an external boiler or steam source.
    How does the temperature control system maintain stability?
    It monitors temperature in real time using thermocouples or infrared thermometers. A PID and fuzzy control algorithm then dynamically adjusts the heating power and conveyor speed, regulating steam flow, fan speed, or gas valves to maintain stability.
    How is moisture removed during the drying workflow?
    As the heating system generates hot air or radiant heat, it exchanges heat with the film to evaporate moisture. An integrated exhaust device then actively removes the evaporated moisture from the oven.
    What happens to the film at the end of the workflow?
    Before exiting the oven, the film passes through a cooling section that uses natural cooling or fans. This reduces the temperature of the film to ensure it meets winding requirements.