Autofold Machine

Autofold Machine

The first ducting coil line, also known as the Autofold machine (the Autofold 416) was released in 1984 by Engel Europa. This company is well known for designing and manufacturing machinery for the Air Conditioning, Heating and Ventilation industries.

Recent developments

Southern Air conditioning uses the most recent addition to this stable, the Autofold 516 which is able to use 5 ft steel coils. Through strict quality control, only the highest-grade materials in these machines and maintain exacting tolerances which ensure maximum reliability of all machine parts. Highly skilled craftsmen carefully select and test each component prior to the final assembly. In addition to this, all machines carry one year parts and labour warranty supported by an efficient after sales service.


A major development factor of the Autofold 516 has been safety of operation. This has resulted in a number of unique safety features, giving the machine the European CE mark and SMACNA Award for Machine Safety.

Spiral Machine

Spiral machine

The newest addition to the group of spiral tube machines is the Automatic Tubeformer 1602. Southern Duct Manufacturing brings you this benchmark tool which covers the complete range of Eurovent standard sizes up to 1600 mm in diameter. Various features make this model almost noiseless in operation, with the introduction of a corrugation unit reducing material costs. Another development has been the module technique which gives the customer the possibility to choose between a number of options.

Plasma Machine

Plasma cutting is a process used to cut steel and other metals or materials using a plasma torch. An inert gas (or in some units, compressed air) is blown at high speed out of a nozzle while an electrical arc is formed through that gas from the nozzle to the surface being cut. This turns some of the gas to plasma, which is sufficiently hot to melt the metal and moves fast enough to blow molten metal away from the cut. The result of this process is very much like cutting butter with a hot jet of air.

The two cycle approach:

The torch uses a two cycle approach to producing plasma. Firstly, a high-voltage, low current circuit is used to initialise a very small high intensity spark within the torch body, generating a small pocket of plasma gas. This is known as the pilot arc.

The plasma is now conductive which contacts the workpiece (the anode). The plasma completes the circuit between the electrode and the anode, conducting the low voltage, high current. If the plasma cutter uses a high frequency/high voltage starting circuit, the circuit is usually turned off to avoid excessive consumable wear.

What is this used for?

Plasma is an effective means of cutting thin and thick alike. Handheld torches can usually cut up to an inch (13mm) thick steel place. Stronger computer-controlled torches can pierce and cut steel up to 12 inches (300 mm) thick. New technologies allow the plasma ignition arc to be enclosed within the nozzle, thus allowing the cutter to be used for non-conductive workpieces.

Plasma cutters produce a very hot and localized "cone" to cut with. This means that they are extremely useful for cutting sheet metal in curved or angular shapes.

Map Software


CAM-duct is a complete production control system for ductwork contractors.

Key features of this software include:

  • Exceptional Graphic User Interface for entering and confirming fittings and their developments.
  • In-built DW144 and SMACNA Pressure Class Specifications.
  • It is supplied in several languages (Unicode): English, USA, French, German, Russian, Chinese, etc.
  • Supports the following systems: D-Mate, MEZ, METU, Doby, TDC, TDF, Slip-&-Drive and other Flanging Systems.
  • Double-Wall Duct, Internal or External Insulation Interfaces with most makes of Machines, Controllers and Cutting tools around the world
  • Sheet Metal workers can use CAM-Duct efficiently after only 2 days of training.
  • Provides management reports, bar code labels, and exportable data.

The Software includes Libraries of Rectangular, Round and Oval Duct Fittings which can be dimensioned and automatically manufactured using CNC controlled Plasma Cutting Machines, Coil Lines, Lasers, Water Jet Cutters or Routers.

Canal Walk, Cape Town
Canal Walk
Cavendish Square, Claremont
Cavendish Square, Claremont
Mountain Mill, Cape Town
Mountain Mill, Cape Town
V&A Clock Tower, Cape Town Waterfront
V&A Clock Tower, Cape Town Waterfront