Induction billet heater for the heating of cast strands or billets before extruding
JunkerDynamicHeater(Trademark) - MC
The flexible type of heater is the induction heater. Where necessary, it allows the operator to set any desired temperature profile – the so-called "taper" – over the length of the billet for an isothermal extrusion process. As the induction furnace will normally heat every billet individually, billet-to-billet temperature, diameter or length variations can be implemented without impairing the particularly close
temperature tolerance. Apart from the custom-designed induction coil, Otto Junker's IGBT frequency converter – built into hundreds of installations and providing numerous parameter variation options (power, frequency) – is at the core of this technology. The system can be supplied with optional equipment such as transformers or water recooling systems.
Further unique selling points of the JunkerDynamicHeater(TM) include the following:
- Ceramic melt protection tube reduces energy demand.
- OTTO JUNKER billet trough conveyor system prevents scratches and scoring on the billet surface
- Continuous comparison of measured and calculated values for optimum safety and reliability
- IGBT converter and coil, as core components, are built in-house and tested/adjusted before shipment.
Where particularly high flexibility standards apply, induction heaters are preferably employed for the final heating step downstream of a gas fired heater.
Where electricity prices are favorable or no gas supply is a vailable, induction heaters are also a viable alternative for the entire heating process.
JunkerDynamicHeater(Trademark) - SC
OTTO JUNKER's JuDy-SC is the small-footprint, low-budget solution. This easily retrofittable version of an induction heater is used to boost the output of an existing gas fired heater or to provide a temperature profiling ("taper") capability. It is characterized by its particularly compact design, given that the JuDy-SC unit, unlike a typical JuDy-MC, needs only one single short coil section. A special measuring and control process developed by OTTO JUNKER allows the temperature profile to be created dynamically during the passage of the billet.