Heating Unit, Tire Heating Apparatus, and Method for Remodeling Tire Mold

摘要

The present invention provides a heating unit capable of easily and inexpensively adjusting total impedance based on tire mold size so that a power source can be used at a high power factor, and a tire heating apparatus using the same. A ferromagnetic metallic member 10a heats a tire mold M1 by heat conduction. An induction heating coil C1 is disposed on the side of the ferromagnetic metallic member 10a opposite the tire mold M1 to induction-heat the ferromagnetic metallic member 10a by generating magnetic field lines. A nonmagnetic conductor 30a is disposed on the side of the induction heating coil C1 opposite the ferromagnetic metallic member 10a to shield the magnetic field lines generated by the induction heating coil C1. A heating unit 100a including these elements heats the tire mold M1 storing a tire. A relative positional relationship among the nonmagnetic conductor 30a, the induction heating coil C1 and the ferromagnetic metallic member 10a is set by first spacers 71a and 72a and second spacers 21a to 23a.