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High-Quality GDF PDF Steel Coil Flange Profile Machine for HVAC - China Suppliers & Factory Direct Production

Liding square air duct production line is a state-of-the-art, fully automated integrated forming system, meticulously developed by our team with over 20 years of expertise in cold roll forming technology. This equipment is specifically designed to facilitate the one-stop full-process production of rectangular HVAC ventilation ducts. Our production line is optimized for the efficient batch forming of GDF/PDF standard flanges, making it an ideal choice for high-volume continuous production. It caters to the diverse needs of professional duct prefabrication factories, building material processing enterprises, and large-scale construction general contractors worldwide. As a leading manufacturer and supplier in China, we ensure that our cutting-edge solutions meet the multi-specification customization demands essential in today's competitive market
    30 +
    Years of Experiences
    500+
    clients worldwide
    CE
    certification

    Why do professionals choose LIDING flange machines?

    Industry-Leading Production Efficiency & Significant Labor Cost Reduction

    This GDF PDF flange integrated production line has a standard continuous forming speed of 8-10m/min, which is 2-3 times higher than the traditional split-type semi-automatic duct processing equipment on the market. The whole line adopts a fully automatic closed-loop control design, which completes the full production process from raw material steel coil to finished GDF/PDF flange duct in one line, without the need for multi-equipment transfer and manual intervention in the middle. Only one operator is needed to complete the whole line operation and production management, which reduces the labor demand of duct production by more than 80% compared with the traditional processing mode. The system is equipped with forward, reverse and emergency stop full-function control, which can flexibly adjust the production speed according to the actual production needs, and perfectly adapts to the large-volume continuous production and small-batch multi-specification customized processing scenarios. This core advantage has been widely verified by our repeat buyers, who have confirmed that the equipment has fast production efficiency, compact structure and saves a lot of workshop space.
    Unmatched Production Efficiency & Labor Savings

    High-Grade Core Material Configuration & Ultra-Long Service Life

    The core forming rollers of the equipment are made of high-quality GCr15 bearing steel as standard, and can be upgraded to Cr12mov alloy steel with overall vacuum quenching treatment (hardness up to HRC62-64°) according to production needs. Compared with ordinary carbon steel rollers, it has super wear resistance and impact resistance, and the service life is more than 3 times longer. The roller shaft is made of 45# high-quality carbon structural steel with a standard diameter of Ø45mm, which is processed by high-precision CNC grinding and overall quenching treatment, ensuring sufficient rigidity and stability under long-term high-load continuous operation. The cutting blade is made of high-hardness alloy steel with precision machining, which can realize clean and burr-free cutting of the duct, no frequent grinding and replacement, and greatly reduces the daily maintenance cost of the equipment. Our customers have verified that the equipment has excellent overall build quality, the formed flange joints are tightly fitted, and the equipment has a very low failure rate during long-term operation.
    High-Grade Materials & Long Service Life

    High-Precision Continuous Forming, Fully Compliant with International Industry Standards

    The equipment adopts a 22-station progressive continuous roll forming structure, and can be upgraded to a 26-station forming system according to the process requirements. It is matched with a high-precision pneumatic circular saw cutting system, and the optional servo motor flying cut system can realize non-stop fixed-length cutting, which ensures the accurate size and stable structural strength of the formed flange duct. The high-precision forming process ensures that the finished duct has excellent air tightness and flange fitting performance, which strictly complies with the international HVAC ventilation duct production and installation standards. It eliminates the need for secondary grinding, correction and rework on the construction site, greatly reduces material waste in the production and installation process, and effectively reduces the on-site installation cost of the project. The optimized double-coupled flange forming design significantly improves the ventilation efficiency of the finished duct, and the equipment operates at a very low noise level during production, which meets the environmental requirements of the workshop production site.
    Precise Forming Meeting International Standards

    Intelligent PLC Control System, Simple Operation & Reliable After-Sales Guarantee

    The equipment is equipped with a standard Panasonic PLC control system, matched with a frequency converter and industrial touch screen man-machine interface, which can realize one-click parameter setting and specification switching, and the operation logic is simple and clear. No professional senior technical background is required, and ordinary workers can fully master the full operation of the equipment after short-term training. The electrical components of the whole line adopt international and domestic well-known brands, which ensures the stable performance of the equipment during long-term continuous operation, low failure rate, and convenient daily maintenance and troubleshooting. We provide fast technical response for all customers, free online technical support for life, and free replacement of defective parts during the warranty period. At the same time, our professional engineers can go to the customer's factory overseas to provide on-site installation, commissioning and operation training services according to the needs.
    Intelligent PLC Control & Easy Operation

    Standard Production Process

    Decoiler Feeding → Automatic feeding and leveling → 20-station continuous roll forming → Precision sizing and straightening → Fixed-length cutting → Finished GDF/PDF flange discharging
    Standard Production Process

    Frequently Asked Questions (FAQ)

    What is the production speed of the LIDING flange integrated production line?
    The production line features a standard continuous forming speed of 8-10m/min. This high-efficiency system is 2 to 3 times faster than traditional split-type semi-automatic duct processing equipment, significantly boosting productivity.
    What materials are used for the core forming rollers and shafts?
    The core forming rollers are made of premium GCr15 bearing steel as standard, which can be upgraded to Cr12mov alloy steel with vacuum quenching (hardness HRC62-64°). The roller shaft is constructed from high-quality 45# carbon structural steel with a Ø45mm diameter, processed via CNC grinding and quenching.
    How does the machine ensure high-precision continuous forming?
    The machine utilizes a 22-station progressive continuous roll forming structure (upgradable to 26 stations) combined with a high-precision pneumatic circular saw cutting system. Users can also opt for a servo motor flying cut system to achieve non-stop, fixed-length cutting.
    Is the control system easy to operate for standard workers?
    Yes, it features a standard Panasonic PLC control system, frequency converter, and an intuitive industrial touch screen man-machine interface. This allows for simple, one-click parameter settings and specification switching without requiring a senior technical background.
    What kind of after-sales and technical support do you provide?
    LIDING provides lifetime free online technical support, fast response times, and free replacement of defective parts during the warranty period. Additionally, we can dispatch professional engineers to overseas customer sites for installation, commissioning, and training services.

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