Induction + Gas
The TEM PRO Heater® downstream of a gas furnace does not differ in structure and functionality from systems for purely inductive heating. The main difference is a significantly lower power, since thermal energy has already been introduced by the upstream gas furnace.
Like the TEM PRO Heater® for heating aluminium billets starting from room temperature, these are used to heat them to the temperature required for extrusion - evenly over the length of the billet or according to a preselected temperature profile (taper heating).
They consist of a state-of-the-art IGBT frequency converter, a compensation field with power capacitors for reactive power compensation, an induction coil and the necessary system and process control. In addition, there are mechanical devices of various designs for billet handling as well as mains transformers for the power supply of the converters and cooling systems for converters and coils.
With a TEM-PRO Heater® connected downstream from a gas furnace two goals can be pursued:
- More precise heating
- Higher throughput
Both are interesting when planning and designing new extrusion lines, but can also be easily integrated into existing extrusion lines, for example if the precision of the heating for more complex profiles is to be increased or the existing heating is the production-limiting factor and production is to be increased.
At the same time, the integration of a TEM-PRO heater®, even if this is designed for the final reheating of preheated billets, opens up the heating of billets from room temperature to extrusion temperature, with limitations in terms of throughput, for example for the production of particularly demanding alloys or for sample extrusion.