Spiral Duct Edge Forming Machine

What is a Spiral Duct Edge Forming Machine?

A spiral duct edge forming machine, also commonly known as a spiral duct flanging machine or flange forming machine, is a specialized piece of industrial equipment used in HVAC (Heating, Ventilation, and Air Conditioning) ductwork fabrication. It adds precise, uniform flanged edges—such as angle flanges, saddle flanges, or profiles like TDC/TDF-compatible ends—to the ends of round spiral ducts. These flanges enable secure, leak-resistant connections between duct sections using bolts, cleats, gaskets, or other fasteners, which is essential for efficient assembly, airtight performance, and system integrity.

How a Spiral Duct Edge Forming Machine Works

The spiral duct edge forming machine processes pre-formed spiral ducts produced by a separate spiral tubeformer by feeding the duct end into a series of hardened rollers or forming heads. These rollers precisely bend and shape the edge into a flange profile while maintaining uniformity and avoiding deformation. Key steps include duct positioning, where the spiral tube is loaded and aligned (often with laser guides for accuracy), followed by flange forming, where rollers create the desired profile—such as rolled edge, angle flange, or saddle flange—in seconds to minutes depending on material and length, and precision control, where modern machines use PLC systems for adjustable settings ensuring tolerances as tight as ±0.3mm. This process works on various materials, including galvanized steel (most common), aluminum, and stainless steel (typically 0.5–1.5mm thickness). It handles ducts over 3 meters long and completes flanging quickly—often in 15–60 seconds per end—with just one operator.

Benefits of Using a Spiral Duct Edge Forming Machine

These spiral duct edge forming machine machines significantly enhance HVAC duct production by: 

• improving system efficiency—where precise flanges create stronger, more airtight connections reducing air leakage and energy loss

• reducing material waste—where uniform forming minimizes scrap and rework

• speeding up installation—where flanged ducts bolt together quickly on-site cutting labor time

• enhancing quality and consistency—where automation eliminates manual variations ensuring professional results every time

• lowering costs—where reduced labor, faster throughput, and durable output provide excellent ROI for fabricators

In summary, a spiral duct edge forming machine is a key asset for any operation producing high-quality round HVAC ducts, turning basic spiral tubes into ready-to-install components for ventilation, air conditioning, dust collection, and industrial exhaust systems. If you're looking into purchasing or integrating one, models from reputable brands like HYRUN offer great flexibility and reliability.