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Postheating with induction

Postheating with induction

Postheating is a major area for EFD Induction, and we have designed and installed numerous solutions around the world. Many of our postheating solutions are concentrated to the automotive, aviation, cable and wire, electrotechnical, and tube and pipe industries.    


Induction is an excellent way of postheating. The heat is generated directly in the material and is very accurate—time and time again. This reduces radiation loss and shortens heating times compared with gas or furnace.   Even more important is the higher quality and throughput achieved in the end. You get, for example, a faster and improved cross linking process of cable insulation.

Minac 18/25 Twin


Mobile heat generators


The Minac range of complete mobile induction systems is even easier to use than its acclaimed predecessor.


A ready-to-use system, all that has to be done upon delivery is: 1) attach a coil, 2) connect supply voltage, 3) connect cooling water. In models with closed cooling systems, only the supply voltage needs connecting.


Once installed, the Minac's clear, menu-based and multi-language control panel ensures maximum ease-of-use. Moreover, this simplified control/user interface is common to all Minac equipment.


Many Minac models come in "Twin" versions offering two independent power outputs. The Twin versions feature split control panel displays—one for each power output.


The Minac is simple to operate. Handheld transformers (HHT) feature on/off and precise power controls. In fact, the HHT is as easy to operate as a regular electric drill. Flexible, water-cooled cables connecting the HHT to the converter allow easy access to workpieces.








Product sheet :  Minac


Universal heat generators


Choosing Sinac gives you more than the market's most advanced, most reliable induction heating systems. You also get easy access to EFD Induction’s global service, training and spare parts network. This network—which is made up of manufacturing plants, service centers and local representatives—means you are never far from qualified help and support.  


Opting for Sinac also ensures you get the best possible solution tailored to your specific needs and conditions. Prior to designing your system, our engineers, metallurgists and material experts assess your requirements. Testing and computer simulation at our labs guarantee you receive equipment which is optimized to your applications and which can be painlessly integrated into existing production lines and processes.      


Product sheet :  Sinac


Industrial heat processing systems


HeatLine is EFD Induction’s family of systems for melting and forging applications. A comprehensive range, HeatLine systems feature serial and/or parallel compensated induction power sources for a wide range of output powers and frequencies.


HeatLine’s serial technology is built around robust, high-uptime IGBT transistors. Our parallel technology features thyristor, IGBT and MOSFET components. Each HeatLine converter offers automatic load matching, a single microprocessor-based control board and integrated capacitors.


In addition to systems for melting and forging, HeatLine offers solutions for graphite coating, wire and strip heating, spring wire rolling, glass melting, graphite susceptor heating, galvanizing, food and chemical vessel heating, and other special applications.




Product sheet :  HeatLine

Induction postheating in the automotive industry

The automotive industry has traditionally been at the forefront of efforts to slash costs while simultaneously raising quality levels. Little wonder then that automakers and their suppliers have been aggressive adopters of induction technology.


At EFD Induction we have over the years developed and installed numerous postheating solutions for the car industry. Some examples are postheating of crankshafts, camshafts, CV joints, starter rings and camshaft gears. We also work with induction postheating for the polymerization of brake discs (GEOMET® and DACROMET® processes).

Induction postheating in the aviation industry

Induction postheating is particularly suitable for reducing stresses caused by welding repairs in. for instance, for jet engine casings. This is not only because induction heating is accurate, repeatable and contact-free heat, but also because it meets all the rules for heat treatment in the aviation industry.


EFD Induction offers mobile, compact induction heating equipment. Welding joints can therefore be postheated on planes anywhere in the world—just take the equipment with you.

Induction postheating in the cable and wire industry

EFD Induction has for years worked closely with the cable and wire industry on developing induction solutions.


Using postheating for cables speeds up the process of vulcanization of the insulation layer. In addition, induction heating is accurate and controllable, and the output power is in most cases controlled via the line speed.


Induction postheating is also used for wires, tubes and strands, for shaping objects or faster drying of paint.

Induction postheating in the electrotechnical industry

Our compact and mobile induction equipment performs a variety of induction postheating tasks within the electrotechnical industry:

  • Softening of copper and aluminum bars after bending to reduce the risk of cracking
  • Post-extrusion heating of cable cores
  • Removing of shrink-fitted parts (out-mobile Minac equipment can perform this task, even in locations such as oil rigs, power stations, wind farms, etc.)

Induction postheating in the tube and pipe industry

Induction postheating is used in the tube and pipe industry  to eliminate hardening structures, which may have arisen after welding. New steel quality guidelines, in particular APT, often demand reheating after welding.


Thanks to the accuracy and controllability of heat induction, it is possible to increase precision in postheating. This, in turn, produces pipes that are more durable, more resistant to cracks and less susceptible to corrosion.