Temperature Dependence and Magnetic Properties of Injection Molding Tool Materials Used in Induction Heating

To analyze the heating phase of an induction heated injection molding tool precisely, the temperature-dependent magnetic properties, B-H curves, and the hysteresis loss are necessary for the molding tool materials. Hence, injection molding tool steels, core materials among other materials have, in this paper, been characterized for their temperature-dependent magnetic properties. The properties have been measured using a vibrating sample magnetometer, able to reach to 350 °C. The established material database comprises the B-H loops, from which the mean B-H curve, relative permeability versus magnetic flux density, and hysteresis loss versus magnetic flux density have been extracted and are presented.