Simulation Study of Induction Heating of Multi-Metallic Injection Moulds

This paper presents a concept and a simulation study into induction heating of multi-metallic injection moulds.This novel technology involves heating only selected cavity walls which are critical areas in forming thin-walled parts.Such regions are often places, where defects occur.In order eliminate the defects, it requires increasing the temperature of selected critical forming walls within a single cavity.In this work, simplified models of forming inserts of different shapes were created.Walls intended for induction heating were selected and separated.Forming cavities were defined as paramagnetic materials, whereas, heated walls were made of ferromagnetic steel 1.2343.Induction coil was placed 1 -5 mm away from the wall.As a current source 10 kW induction generator EFD Minac 6 was used.The current frequency was 25 kHz.The obtained results show that it is possible, without a significant cycle time growth, to dynamically increase the temperature of selected walls by applying selective induction heating technology.