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

Tunnel furnaces designed for thin film production are essential for achieving optimal throughput, quality, and environmental protection in today's competitive market. These furnaces must utilize corrosion-resistant materials, advanced heating methods, and precise temperature control to meet stringent industry standards. When selecting a model, it's crucial to consider the production needs, budget, and technical capabilities of the suppliers. Key factors include the choice of materials, heating techniques, temperature control accuracy, and environmental features. As the industry evolves, energy conservation, standardization, and environmental upgrades will emerge as prominent trends. For businesses in China seeking reliable furnace solutions, partnering with reputable suppliers and factories will ensure access to cutting-edge technology and exceptional after-sales service
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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, featuring 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, with heating devices (electric, gas, or steam) installed on the side walls. Air outlets and exhaust devices are positioned at both ends.

    Conveyor System
    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
    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
    Step 1: Material Feeding

    The film enters the oven via a conveyor belt.

    Step 2: Heat Exchange & Evaporation

    The heating system generates hot air or radiant heat, which exchanges heat and moisture with the film, evaporating moisture.

    Step 3: Moisture Exhaust

    An exhaust device removes moisture. Some designs use fans to accelerate air flow, improving drying efficiency.

    Step 4: Cooling & Output

    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 (FAQ)
    What materials are used to construct the furnace?

    The furnace is constructed using high-temperature-resistant stainless steel (such as SUS310S) or welded carbon steel. The interior is lined with insulation panels, such as ceramic fiber modules, and features air distribution plates.

    How do I choose between a Teflon and a Stainless Steel mesh belt?

    Teflon mesh belts are ideal for materials prone to sticking, such as films, as they are anti-stick, wear-resistant, and withstand temperatures above 250°C. Stainless steel mesh belts (304/310S) are best suited for high-temperature and highly corrosive environments.

    What are the benefits of the different heating system options?

    Electric heating offers fast heating and uniform temperature control for high-precision needs. Gas heating is cost-effective but requires exhaust gas treatment facilities. Steam heating offers moderate costs if your facility already has an established steam source.

    How does the temperature control system maintain stability?

    Real-time temperature is monitored using thermocouples or infrared thermometers. A PID control algorithm combined with fuzzy control dynamically adjusts the heating power and conveyor speed, executing stability adjustments through steam flow, fan speed, or gas valves.

    What happens during the cooling section of the workflow?

    In the cooling section, natural cooling or fans are used to reduce the temperature of the film. This ensures the film meets the necessary temperature requirements for winding immediately after exiting the oven.