Daido Tokushuko Kabushiki Kaisha

Daido Steel Co., Ltd.

Intermetallics Co., Ltd.

Gm Global Technolgoy Operations, Inc.

Daido Tokushuko K.k.

Norio Yoshikawa

Yasuaki Kasai

Hiyoshi Yamada

Teruo Watanabe

Yutaka Yoshida

Masato Sagawa

Makoto Saito

Osamu Itatani

Viswanathan Panchanathan

Shinichiro Yahagi

Tetsuhiko Mizoguchi

Toshiya Kinami

A powder-filling system capable of filling a container with powder at an approximately uniform filling density has: a hopper having an opening removably and hermetically closably attached to the container, the hopper communicating with the container at the opening for supplying powder to a container; a powder supplier for supplying powder to the hopper; a gas supplier for repeatedly supplying compressed gas in a pulsed form to the hopper, with the hopper hermetically closably attached to the container; and a sieve member provided at the opening and having a smaller openings in a region near a side wall of the hopper than in its central region. The smaller openings in the region near the side wall of the hopper where the powder more easily falls from the hopper into the container impedes the fall of the powder in that region and improves the overall uniformity in the filling density.

Powder-filling system

A rotor comprises a rotor body and a ring-shaped rare earth metal-iron type magnet arranged therearound, in which a low thermal-expansion material is inserted between the rotor body and the magnet.

Rotor provided with a ring-shaped magnet

A magnet is formed as a ring magnet and magnetized by radial application of a magnetic field while the intensity of the magnetic field is changed periodically along the circumference of the ring magnet to give a circumferentially sinusoidal waveform distribution of magnetic flux density to the ring magnet in the magnetized state of the magnet.

Radial anisotropic ring magnet with a sinusoidal waveform and producing

A method for producing an anisotropic rare earth magnet is improved by extruding using a compacted material formed in a shape having difference in level between the center part to be in contact with the end face of a punch and the outer peripheral part to be faced with a molding cavity formed between the punch and a cylindrical die of a mold.

Method for producing anisotropic rare earth magnet

The ability to hot work RE-Fe-B type compositions to form anisotropic magnets containing Nd.sub.2 Fe.sub.14 B.sub.1 -type crystal grains is improved by the addition of suitable, small amounts of one or more of cerium, lanthanum or yttrium. The improvement in hot working is seen in the reduction of cracks in the deformed body and in the ability to reduce the hot working temperature without a significant penalty in magnetic properties.

Rare earth magnet alloys with excellent hot workability

A method of forming a cylindrical compact for a cylindrical magnet is improved by moving a core pin and a die of a mold at the same time of pressing magnet materials with a pressing punch in the same direction as that of the pressing punch at travelling speed Vc and Vd indicated by following equation:

Method of forming thin-walled elongated cylindrical compact for a magnet

A method for producing an anisotropic rare earth magnet is improved by applying compressing stress on a free surface of an compacted material at the time of extruding the compacted material in order to prevent forming cracks, and improved by using a double action punch provided with a core punch and a sleeve punch so as to mold a compacted material and extrude the compacted material into the anisotropic magnet material in a single heat process continuously.

Growing community of inventors

Nagoya, Japan

Norio Yoshikawa