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Low Temperature Continuous Tunnel Furnaces for Thin Film Products – Top China Suppliers & Factory Solutions

Tunnel furnaces designed for thin film production in China must utilize corrosion-resistant materials, advanced heating methods, and precise temperature control to meet the demands of modern manufacturing. These furnaces not only enhance throughput and product quality but also incorporate environmentally friendly features that align with global sustainability efforts. When selecting a model, it is crucial to consider the user's specific production needs, budget constraints, and the technical capabilities of suppliers. Key factors such as material composition, heating techniques, temperature control precision, and after-sales support should guide the decision-making process. As the market evolves, energy conservation, standardization, and environmental upgrades will emerge as pivotal trends, positioning China as a leader in the manufacturing sector. Finding reliable suppliers and factories that prioritize these elements will be essential for gaining a competitive edge
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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
    Q: What materials are used in the construction of the furnace?

    The furnace is constructed using high-temperature-resistant stainless steel (such as SUS310S) or welded carbon steel. It also features internal insulation panels, like ceramic fiber modules, and air distribution plates to ensure thermal efficiency and durability.

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

    Teflon mesh belts are ideal for materials prone to adhesion (such as films) and can withstand temperatures above 250°C. Stainless steel mesh belts (made of 304/310S) are best suited for high-temperature and highly corrosive environments where anti-stick properties are not the primary concern.

    Q: What heating options are available for the drying oven?

    The oven supports three heating methods: electric heating (infrared tubes/resistance wires for fast, uniform, high-precision heating), gas heating (cost-effective but requires exhaust treatment), and steam heating (moderate cost, suitable for facilities with an existing steam source).

    Q: How does the temperature control system maintain stability?

    The system uses real-time monitoring via thermocouples or infrared thermometers. A PID control algorithm combined with fuzzy control dynamically adjusts the execution layer parameters, such as steam flow, fan speed, or gas valves, to stabilize the temperature.

    Q: What is the purpose of the cooling section in the workflow?

    The cooling section uses either natural cooling or forced air fans to lower the temperature of the film before it exits the oven. This ensures the film is cooled down sufficiently to meet winding and storage requirements without damage.