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Automatic Duct Manufacture Line

Duct manufacture auto line is designed for medium to large volume workshops and is used to work with the coiled metal with weighting up to 6 tons, thickness up to 1,2 mm and minimum duct size 180x180 mm .

Full auto duct line provides high efficiency for straights air-ducts production.  One operator can manage the whole production line. The quantity and the parameters of the required products are inserted directly through the Touch Screen of the controller with a convenient and easy to manage interface. After input the dimensions of the duct you want to process and then this auto line can complete the following functions automatically: uncoiling, feeding, leveling, grooving, notching and punching, shearing, Pittsburgh locking, TDF flange forming / Angle steel flange or “ C” drive cleat forming (optional) and duct folding, seam closing.

LOCFOME’s Auto-line V is being used to complete the TDF flange / Angle steel flange ducts or “ C” drive cleat forming (optional), its special modular design allows it  can be used in these different configuration. The production capacity can be up to 600 to 2000 square meters per day.

Basic Information


LOCFOME Duct auto line V  as the square duct machine is mainly used for the production of rectangular or square duct system, from coil to duct, automated production with advanced technology and high production efficiency. The whole production line is composed of the feeding frame, leveling device, punching device, cutting device, Lock former, Manipulator, feeding platform, dual TDF (tdf flange machine), servo feeding platform.  The final process is folding. Duct zipper is needed if you want to achieved the welding automatically.

This production line has the characteristics of simple operation, stable performance, accurately control of the size and so on.


Working Flow

De-coiler——feeding——Leveling and grooving——Notching—Punching—cutter——Lock former——servo feeding convey——TDF, seam cleat——Servo feeding——Folding ∟、U、□




duct manufacture auto line V.jpg


Feeding Frame (four de-coiler)

The material rack can be placed two volumes of materials, a single volume can be carried 6T. 45# steel pipe.  The rack is equipped with a 1.5Kw motor, the worm gear driving device, a control circuit, realizes the automatic control of feeding, discharging and move the feed function on the sheet surface plays a very good protective effect, avoids feeding machine damage material edge phenomenon. User refueling as long as the feeding shaft hanging down from the whole discharge rack, into the roll material to be used in the inner core, is placed, coil has the advantages of simple operation, ease of refueling. Put rack feeder for multi roll production occasions, convenient conveying materials.



Main Body (feeding-leveling-grooving-notching-punching-cutting)

Feeding: The front is a pair of feeding rollers feed in without slipping, and ensure that the outer surface will not damage the sheet;

Leveling and Grooving: Five leveling roller; a pair of grooving roller, , reinforcement spacing is 6 * 230mm.

Notching: Notching square (37mm) and shape (3mm), total four pieces of mould. Each mold consists of a bore 50mm stroke 30mm cylinder, and the hand wheel is rotated by rotating the screw to adjust the different width of the plate shear angle and shear angle depth.

Punching: Punching hole on flange, two sets of mold. Each mold consists of a cylinder, a hand wheel is rotated by rotating the screw to adjust punching and punching position of different width plate

Cutting: The hydraulic cutter, equipped with two 63mm diameter cylinders, 65mm stroke, to ensure the synchronization of the cut at both ends of the two cylinder moves, using a synchronous shaft through a gear rack drive.




Manipulator(for clipping the plate)

The circular guide rail manipulator, using aluminum connecting installation cylinder (TN5*80) as the driving force. 


Transverse Pittsburgh Lock former

The whole machine is controlled by the cylinder without piston rod to move, and realize the sheet metal forming process.  Cold rolling forming roller adopts GCr15 material, with strict heat treatment and finishing.




Servo Feeding Platform (Convey I and II)

The surface of the conveying roller is galvanized, and the two sides are provided with a retaining device to locate and prevent the running material. The motor adopts the frequency converter to adjust the feed line speed, and the sheet metal is sent to the flange forming device stably and reliably.

By the fixed frame, belt drive system and servo system. The servo system by axis high precision linear slide type, servo motors. The sheet on the flange forming device for forming flange after entering the servo feeding platform, then the manipulator device stopped first set up a good position in (to the position according to the production of wind pipe diameter size), sheet by the conveyor belt to the rear folding machine, when the sheet feeding manipulator by servo after the proximity switch, an induction signal to the control system, the manipulator rise in promoting by the lifting cylinder and the servo motor start fast forward to catch the sheet, when the contact switch on the manipulator with the sheet back side, mechanical manual clamp plate according to the design parameters of step forward feeding.







Dual TDF machine

On both sides of the use of a separate motor control, the use of linear guide rail precision movement can be adapted to the different width of the plate material on the cold. Two conveyor belts are used in the center to adapt to the cold rolling speed.
A. duplex TDF flange: cold rolling die by the 14 sets of symmetrical two sets of roll. The roller is made of high quality alloy steel, which is processed by heat treatment and numerical control lathe, the hardness of the roller can reach 58~62HRC, and the width of the forming can be adjusted.
B. hook bone (CS bone) flange: cold rolling die by the 8 sets of symmetrical two sets of roll. The roller is made of high quality alloy steel, which is processed by heat treatment and numerical control lathe, the hardness of the roller can reach 58~62HRC, and the width of the forming can be adjusted.




Folding device: twoФ100×50 cylinders have adopted for the clamping process, oneФ63×320 cylinder for the bending. Through fixing the down beam, and moving the up beam to achieve this fasten process, this tightly structure assure the bending accuracy. This clamping and bending processes are electric controlled.


Electrical, Hydraulic system

1) Hydraulic system and numerical control to complete the automatic and full range of hydraulic function. The main components of the system using foreign famous hydraulic components to ensure the stability of the machine
2) The electrical control system of central processor uses the programmable controller, the driving device adopts intelligent digital AC servo system, man-machine interface for high resolution color touch screen, the system interface is provided with 10 order management, all rooms equipped with a complete, independent function can keep counting, convenient for the operator to check work records on.







Material thickness

0,5 - 1,2 mm

Max.coil width

1250 mm

1500 mm

Max. coil weight

6000 kg

Cut-to-length size

600~4000 mm

Max.duct size

2500х2500 mm

Min.duct size

160х160 mm

Working speed

15 m/min

Power supply

4,0 kw


19X3,4X1,6 m

19X3,7X1,6 m


13000 kg

15000 kg


duct manufacture auto line v (2).jpg

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