Anhui Preda Machinery Manufacturing Co.,Ltd.

--- Auto duct line, spiral tubeformer and relavant duct machines.

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Super Auto Duct Line 5Auto Duct Line 5 UAuto Duct Line 5Auto Duct Line 4Auto Duct Line 3Auto Duct Line 2Cut to Length LineDuplex Flange FormerTDF Flange FormerTDC flange forming machinePittsburgh lock formerS cleat lock formerSnap lock formerRound duct lock formerLock forming machineDecoilerDuct Beading machineDuct slitter and beaderElectrical ShearerManual FolderPneumatic FolderAir seam lockerPortable seam lockerPower FastenerHydraulic seam lockerHydraulic GuillotinePneumatic Corner MaticsCNC Press BrakeDrive cleat benderSpiral tube former PD1602Spiral Tubeformer Mould Type PD1500Spiral Tubeformer Band TypeOvalizer Oval MachineHydraulic elbow making machineSpiral Duct LineHydraulic gorelockerElectric GorelockerPlasma Cutting MachineElectrical Rolling MachineElectric Rotary GrooverRound duct welderAngle iron Flange LineAngle Iron RollingTiltable Power PressHeavy Rolling MachineSuper Auto Duct Line 5Duct Line U 5Duct Line 5Duct Line 4Duct Line 3Duct Line 2Cut to length LineAutomatic Duct LineDuplex TDF Flange MachineTDF Flange MachineTDC flange forming machineLock FormerDecoilerTDF Folding MachinePneumatic TDF Folding MachineBeading MachineSlitting MachineElectric Shearing MachineLock Seaming MachineElectric Lock SeamerCorner MaticsHydraulic CNC GuillotineHydraulic CNC Press BrakeSquare Duct MachinesMould Spiral TubeformerBand Spiral TubeformerOvalizerSpiral TubeformerHydraulic gorelockerElectric GorelockerElectric Rotary Beading MachinePunching MachinePlate Rolling MachineAngle Iron Rolling MachinePlasma Cutting MachineRound Duct MachinesPittsburgh Seam CloserElbow gorelockerMessage & Free QuoteAbout UsAgents Wanted by PredaPreda Machine FactoryMachine Working VideoShipment VideosCompany NewsIndustrial News
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Rectangular duct forming machines

Rectangular duct machine


To cost-efficiently produce rectangular ducts or cooperate with duct lines,

we still need many duct machines for the duct forming works!

In this series, we manufacture Duplex TDF Flange Forming Machine, TDF Flange Former, Lock Former, Decoiler, TDF Folding Machine, Pnuematic TDF Folding Machine, Beading Machine, Slitting Machine, Electric Shearing Machine, Lock Seamer, Auto Lock Seamer, Corner Matics, Hydraulic Guillotine, Hydraulic Press Brake and etc...


duplex TDF flange forming machineduplex TDF flange forming machine

Duplex TDF Flange Forming Machine


To overcome the normal TDF flange forming machine’s disadvantage

that only one end of the plate can be operated to form flange,

duplex TDF flange forming machine provides a perfect solution for that.

Flange forming can be achieved for both ends at a time,

which makes the flanging process much more efficient and stable.

This machine is a top priority for companies who are short of staff

but desired for massive production.





TDF flange forming machineTDF flange forming machine

TDF Flange Former,

TDF flange forming machine/TDF rollformer,

mainly used for making flange at edge of plate for further joint,

is also among basic equipments for modern duct forming line.

All bearings used are ball bearings rather than traditional

needle bearings so the machine more durable.

All gears, axles and rollers equipped in the machineare made from

high quality steel to ensure their stability and durability.

The flange shape made by the machine is nice and practical,

which makes it a perfect part of duct forming line.

Our TDF rollformer has two version, T-12 capable of 1.2mm

and T-15 capable of 1.5mm galvanized metal sheet.



decoilerdecoilerDecoiler


This decoiler is specially designed for duct forming line to

make the material loading and transporting stable.

It can hold 5tons of coils.









lock formerlock formerLock Former

Preda 7-function Lock former/Pittsburgh machines!  
1.  SA-12HB is capable of 1.2mm galvanized steel and SA-15B is

capable of 1.5mm.  

Main difference between SA-12B and SA-15B is the rollers used.    
2.   To fulfil international customers' requirements on electrics standard.

We are able to change our motors and electrics

as per requested free of charge!!  
3.    380V/50HZ/3PH is the regular standard for our machine.

Yet we can manage them into 220V/50HZ/1PH or 420V/50HZ/3PH...  

Cost is free of charge as a cooperation to our international customers!!!

4.    Lock shapes/pins for below,

1.Arc shape  2.Claw shape  3.Orthogonal shape 4.U shape  5. Union shape  6.Z shape  7. Lock pin



TDF folding machineTDF folding machineTDF Folding Machine


Preda Manual TDF Folding machine is specially designed for

HVAC duct folding process.

It can be used together with TDF Flange Forming machine and

Pittsburgh machine to make rectangular HVAC ducts!

Light weight and ease for operating/transport make it suitable

under many circumstances,

especially for short-term working at the construction site.

Machine produced with customerized length can be achieved.





Pneumatic folding machinePneumatic folding machine

Pnuematic TDF Folding Machine


To achieve higher production efficiency and less labor work,

pneumatic folding machine is a good alternative,

compared with manual TDF Folding Machine.

The operating principle is to use air cylinder to replace manual power

without even using electricity.

Rigid frame with strong steel welded is simple but nice.

Low electricity consuming and ease for operation make it widely

used for bending thick steel plate sheet.





Beading MachineBeading Machine

Beading Machine


It is capable to make 1 to 5 grooves with width adjustable for

customer's certain requirements.








Slitting MachineSlitting Machine

Slitting Machine


Beading&slitting machine or groove&shear machine with

grooving and shearing function together,

specially designed for duct forming!

Just need to change the mould when you want to use its certain function.






Corner maticsCorner matics

Corner Matics


Pneumatic corner matics for rectangular duct forming process!

Fixing one corner will take only about 6seconds!!










Hydraulic GuillotineHydraulic GuillotineHydraulic Guillotine
remarkable cutting quality and capacity in great cost performance

Rigid frame is built with thick concrete plate steel to ensure function

stability and durability.

Hydraulic powered system is to realize precise working power,

easy and safe operating.

Rake angle realized by a 0.5° to 3.5° tilt of the upper blade holder makes

the cutting more stable and enlarges the working capacity of thicker

steel plate.

Back gauge retracting range of 10mm-900mm satisfies customer’s common needs.



Hydraulic Press BrakeHydraulic Press Brake

Hydraulic Press Brake

High mechanical strength and great rigidity is due to integrated

welded steel structure.

Hydraulic powered system is to realize precise working power,

easy and safe operating.

Simplified upper dies clamp with micro-adjustable wedges for high precision

Pre-installed upper dies with 88° angle andsolid block lower die with four

face multi “V” frame.


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