Radially anisotropic multipolar solid magnet, and production method and device thereof

Abstract

The present disclosure provides a molding method, a manufacturing method and a molding device for a radially anisotropic multipolar solid magnet, a micro-motor rotor using this magnet, and a component for a motor. A mold core is removed from a mold, and oriented poles, the number of which is the same as that of poles of a radially anisotropic multipolar solid cylindrical magnet, are arranged outside the mold. The sum L of widths or arc lengths of top ends of all the oriented poles is greater than or equal to 0.9πD, where D is the outer diameter of a mold sleeve. The magnet production method breaks through the dimensional restriction to the manufacturing of radially anisotropic multipolar magnets in the prior art, and can produce radially anisotropic multipolar magnets having an inner diameter or diameter less than 3 mm or even less for high-precision micro-motors.