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High-Quality HVAC Duct Flange Making Machine - China Suppliers Factory for GDF/PDF Steel Coil Production

Liding square air duct production line is a state-of-the-art, fully automatic integrated forming equipment developed by our expert team with over 20 years of experience in cold roll forming technology. As one of the leading suppliers in China, we have designed this equipment specifically for the one-stop full-process production of rectangular HVAC ventilation ducts. It is highly optimized for batch forming of GDF/PDF standard flanges, making it ideal for high-volume continuous production. Our factory meets the diverse needs of professional duct prefabrication facilities, building material processing companies, and large-scale construction contractors worldwide, ensuring efficient and customized processing solutions
    30 +
    Years of Experiences
    500+
    clients worldwide
    CE
    certification

    LIDING 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 Flow

    Frequently Asked Questions

    What is the production speed of the LIDING flange machine?

    The GDF PDF flange integrated production line has a standard continuous forming speed of 8-10m/min, which is 2-3 times higher than traditional split-type semi-automatic duct processing equipment.

    What materials are used for the core rollers and shafts?

    The core forming rollers are made of high-quality GCr15 bearing steel (upgradable to Cr12mov alloy steel), and the roller shaft is made of 45# high-quality carbon structural steel with a standard diameter of Ø45mm.

    How many forming stations does the equipment have?

    The machine adopts a 22-station progressive continuous roll forming structure, which can be upgraded to a 26-station forming system depending on process requirements.

    What control system operates the LIDING flange machine?

    It is equipped with a standard Panasonic PLC control system, paired with a frequency converter and an industrial touch screen man-machine interface for easy operation.

    What is the standard production process?

    The process flow is: Decoiler Feeding → Automatic feeding and leveling → 20-station continuous roll forming → Precision sizing and straightening → Fixed-length cutting → Finished GDF/PDF flange discharging.

    What kind of after-sales guarantee is provided?

    We provide fast technical response, free lifetime online technical support, free replacement of defective parts during the warranty period, and optional overseas on-site installation, commissioning, and training.

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