Patent ID: 7854056
Filing Date: 2010-12-21
Classification: H02K,Y10T

Abstract:
1. A method of producing a rotor, comprising: providing a hollow cylindrical rotor core constituted of laminated electromagnetic steel sheets; a slot that is a hole axially formed through the rotor core and arranged near a peripheral edge of the rotor core; a magnet, having an end surface and a side surface, placed in the slot; an upper die provided with a cylinder through which molten resin is to be injected and placed on a first end surface of the rotor core such that the cylinder communicates with the slot via a communication area between the end of the cylinder and the first end surface of the rotor core; and a lower die placed on a second end surface of the rotor core for pressurizing the rotor core in cooperation with the upper die; and fixing the magnet to the rotor core by injecting the molten resin into the slot by injection molding, wherein: