Square Duct Auto Production Line IV (DML-VI, 1250/1550mm, 16m/min) | DDM Machinery, Shanghai, China

Square Duct Auto Production Line IV (DML-VI-1250 / DML-VI-1550)

DDM Machinery: Shanghai, China

Servo-controlled rectangular HVAC duct line from coil to finished duct, handling 0.5 to 1.2mm sheet up to 1,550mm wide with automatic notching, cutting, flanging, and folding, and length tolerance of ±0.5mm.

The Square Duct Auto Production Line IV is a complete line for making rectangular HVAC duct from coil. The line consists of a decoiler, a leveller and grooving unit, "V" and square notching units, a cutting unit, a bending unit, a reciprocating lock former, a feeding unit, and duplex flange forming units for both TDF and angle-iron flanges. A servo system controls the whole production process.

DDM says the line has a small footprint for its output, low energy consumption, and is easy to move, and that it can produce a wide variety of rectangular ducts. It has its own separate console, and a closed-loop feedback system that DDM says greatly improves accuracy and stability. The stated accuracy is ±0.5mm on length and ±0.8mm on the diagonal.

The control components are branded: a Mitsubishi HMI display and PLC, Mitsubishi frequency converter, a Japanese Nemicon inverter, a Taiwanese Hydromax pump, and Taiwanese high-temperature resistant tubing.

Why Choose an Automatic Duct Line?

Rectangular duct involves many steps: cutting the blank, notching the corners, forming the seams, folding, and making flanges. On a manual setup each step needs a machine and an operator. An automatic line does them in one pass and holds tight tolerances.

• Tight tolerances. ±0.5mm length and ±0.8mm diagonal.
• Both flange types. Duplex forming for TDF and angle-iron flanges.
• Fewer operators. Servo control across the whole process.
• Reliable components. Mitsubishi PLC and HMI, and Mitsubishi frequency converter.
• Two widths. 1,250mm and 1,550mm maximum sheet width.

Machine Specifications

• DML-VI-1250: thickness 0.5 to 1.2mm; maximum width 1,250mm; power 19kW; weight 10,000kg; dimensions 18,000 × 3,400 × 1,500mm
• DML-VI-1550: thickness 0.5 to 1.2mm; maximum width 1,550mm; power 20kW; weight 12,000kg; dimensions 18,000 × 3,600 × 1,500mm

Common to both

• Maximum working speed: 16m/min
• Maximum coil weight: 8,000kg
• Length tolerance: ±0.5mm
• Diagonal tolerance: ±0.8mm
• Control: servo system, separate console, closed-loop feedback
• Controls and components: Mitsubishi HMI and PLC, Mitsubishi frequency converter, Nemicon inverter, Hydromax pump

Basic configuration

• Two electric coil cradles with four material trays (5 to 7 tonnes per roll)
• One rack and one host machine
• One mechanical arm for clutching, locating, and transferring
• One movable locking machine
• One duplex TDF flange forming machine
• One duplex angle steel flange forming machine
• One servo feeding platform
• One hydraulic folding machine
• One computer control system

Condition Available: New

Key Features

• Complete line from coil to formed duct
• Servo control with closed-loop feedback
• Duplex flange forming for TDF and angle-iron flanges
• Notching, cutting, and folding in one line
• Length tolerance of ±0.5mm and diagonal tolerance of ±0.8mm
• Mitsubishi PLC and HMI
• Two coil cradles for quick coil changes

Applications

• Rectangular HVAC and ventilation duct
• Duct fabrication shops producing at volume
• Air handling and building services fabrication

Who This Machine Is For

• HVAC duct manufacturers and fabricators
• Building services contractors with in-house duct production
• Shops upgrading from separate manual machines

Frequently Asked Questions

What thickness and width of sheet can it handle?
0.5 to 1.2mm, in maximum widths of 1,250mm (DML-VI-1250) or 1,550mm (DML-VI-1550).

How accurate is it?
DDM states ±0.5mm on length and ±0.8mm on the diagonal.

What flange types does it make?
TDF flanges and angle-iron flanges, with duplex forming machines for each.

How fast does it run?
Up to 16m/min (see notes).

How much space does it need?
About 18m long by 3.4 to 3.6m wide.

What controls does it use?
A Mitsubishi HMI and PLC, with a servo system and closed-loop feedback.

Does DDM make other duct lines?
Yes. DDM lists Square Duct Auto Production Lines II, III, and V.

Is financing or staged payment available?
Yes. A deposit secures your order and begins production, with the remaining balance due only once your machine has been built, inspected, and is ready to ship.

Should I buy new or used?
These lines are available new, built to order.