Overview & High-Speed Spiral Tubeforming

The Automatic Spiral Duct Forming Machine for Round HVAC Air Ducts (Model: LXA-1500) is an industrial band-type spiral tubeformer engineered for high-volume manufacturing of round spiral ventilation ducts, smoke exhaust chimneys, dust collection pipes, and post-tensioning bridge void tubes[cite: 138].

Driven by a 7.5 kW Shanghai Huyuan primary motor and coordinated by an advanced Japanese Mitsubishi PLC with MCGS touchscreen interface, this machine continuously feeds metal strip, rolls lock seams, forms spirals around calibrated fixed-band molds, and cuts tubes to length at speeds up to 38 m/min with superior roundness and airtight sealing[cite: 133, 138].

Precision Engineering & Structural Highlights

• Wide Diameter Range (Φ85 – Φ1500 mm): Flexible band-type forming head enables fast, cost-effective tooling adjustments across diverse diameter specifications without expensive fixed cast rings[cite: 138].
• GCr15 Bearing Steel Rollers: All drive, forming, and lock-seaming rollers are machined from high-rigidity GCr15 bearing steel, vacuum-hardened to eliminate surface wear and zinc stripping[cite: 138].
• Synchronized Flying Cutter System: High-speed circular saw blade cutting unit (optional plasma cutting) tracks the advancing pipe to deliver square, burr-free end cuts on the fly without stopping pipe rotation[cite: 132, 138].
• Integrated Expandable Decoiler: Heavy-duty mechanical expansion coil reel handles coil internal diameters of 480–610 mm with smooth strip tension feeding[cite: 134, 138].