Sumitomo Special Metals Co., Ltd.

Neomax Co., Ltd.

Atsuo Tanaka

Hitoshi Morimoto

Tsutomu Harada

Tadahiro Iwasaki

Atsushi Ogawa

Akira Nakamura

Shoichi Matsugami

Yoshiro Takano

Shouichi Matsugami

A method for manufacturing a sintered magnet includes the steps of producing a green compact of powder for the sintered magnet, machining the green compact with a wire-saw, and sintering the green compact.

Method for manufacturing sintered magnet

A method for producing a compact of rare earth alloy powder of the present invention includes: a powder-filling step of filling rare earth allow powder in a cavity formed by inserting a lower punch into a through hall of a die of a powder compacting machine; and a compression step of pressing the rare earth alloy powder while applying a magnetic field, the steps being repeated a plurality of times. When the (n&plus;1)th (n is an integer equal to or more than 1) stage compression step is to be carried out, the top surface of a compact produced in the n-th stage compression step is placed at a position above the bottom surface of a magnetic portion of a die.

Method and apparatus for producing compact of rare earth alloy powder and rare earth magnet

A powder pressing apparatus comprises a powder feeding apparatus. The powder feeding apparatus includes a container having a bottom portion provided with a powder holding portion formed with openings, and an impactor. The impactor is hit against the container to give an impulsive force, thereby feeding the powder contained in the container into the cavity formed in a die via the openings. The powder fed in the cavity is pressed, and the obtained compact is sintered into a sintered magnet. The powder feeding apparatus may include a feeder box containing the powder, and the feeder box may be provided therein with a rod member, and an opening of the feeder box may be provided with a linear member. In this case, the powder is fed into the cavity while moving the rod member in the horizontal direction in the feeder box, when the feeder box is above the cavity.

Powder feeding apparatus, pressing apparatus using the same, powder feeding method and sintered magnet manufacturing method

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Hyogo, Japan

Atsuo Tanaka