Auto rectangular duct machine line 3  is an ideal machine for making square air ducts, which improves the work efficiency and the aesthetics of the air duct. The auto duct machine line 3 can produce TDC and TDF flanges, consists of a metal feeding trame, leveing and grooving equipment, hydraulic punching square notch equipment, hydraulic cutter and The electrical control system uses a computer with a closed-loop and servo-system to increase the precision and reliability of the manufacture duct by using this system

1. Two sets of electric feeding machine frame (four internal-shoring material cores)
2. One suit of leveling compact bar equipment
3. Four suits of hydraulic pressure attack angle molding
4. One suit of hydraulic pressure shear plate equipment
5. One suit of hydraulic pressure equipment
6. One suit of digital controlling system
7. One suit of hydraulic pressure system

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