What is Induction Heating?
An electro magnetic field is created in close proximity to a conductive coil referred to as the ‘work coil’, preferably formed with copper tubing along which high to very high alternating electric current is passed. When electrically conductive metal, preferably steel is positioned within the magnetic field the stell is heated rapidly. The transfer of heat is controlled from a single state ‘inverter’, connected to thermocouples positioned in and monitoring the temperature of the steel component.
For RTC™ the work coil is formed in copper tubing and shaped to match the profile and configuration of the mould surface to equalise the magnetic field and therefore distribution of heat. The design of the coil is critical for the uniform temperature control of the mould surface within a range of +/- 5°C of the set temperature. Chilled water is flowed through the copper coil in order to avoid overheating of the copper.
IHC is a viable and competitive solution for mouldings which are compartively flat, medium to small size i.e. within a plan area of 500 x 500mm and with a depth of up to 60mm.
Induction Heating Benefits
▪ Reduced investment and energy costs.
▪ Comparable costs of control equipment.
▪ No need for steam generation and associated laws and approval.
▪ Much reduced energy consumption.
▪ Very efficient energy conversion and transfer compared with other alternatives.
The IHC Controller is available in 3 different capacities 15, 30 and 45kW.
GIWW supports both internal and external heating of the mould cavity – see block schematics below.