Nitto-Denko Corporation

Makoto Fujihara

Kenichi Fujikawa

Shoichiro Saito

Takashi Yamamoto

Izumi Ozeki

Toshinobu Hoshino

Makoto Komatsubara

Junya Tabuchi

Katsuya Kume

Miho Yamaguchi

Tomohiro Omure

Kazuo Ouchi

Hirofumi Ebe

Eiichi Imoto

Toshiaki Okuno

Masakazu Morimoto

Hiroshi Matsuo

Yuki Kato

Tomoya Matsuda

Katsuyuki Nakabayashi

Hirofumi Ono

Provided are a rare-earth magnet capable of realizing a high magnetic flux amount without using any back yoke, and a linear motor comprising a movable element using the rare-earth permanent magnet. A rare-earth permanent magnet-forming sintered body for forming a permanent magnet is integrally sintered while being formed into a given three-dimensional shape with a lengthwise cross-section having a first surface extending in a length direction thereof, a second surface lying at a distance from the first surface in a thickness direction thereof and extending in the length direction, and an edge surface of each of lengthwise opposite ends thereof. This sintered body is formed such that easy magnetization axes of the magnet material particles included in a central region thereof are oriented in such a manner as to be directed along an arch-shaped path.

Rare-earth magnet and linear motor using same

This invention provides for a rare-earth permanent magnet-forming sintered body obtained by integrally sintering magnet material particles containing a rare-earth substance while shaping the magnet material particles, a rare-earth permanent magnet obtained by magnetizing the sintered body, and a rotary machine in which the permanent magnet is embedded.

Rare-earth permanent magnet and rotary machine including rare-earth permanent magnet

Provided is a method for producing a sintered body that forms a rare-earth permanent magnet, has a single sintered structure and an arbitrary shape, and has easy magnetization axis orientations of different directions applied to the magnet material particles in a plurality of arbitrary regions. This method forms a three-dimensional first molded article from a composite material formed by mixing a resin material and magnet material particles containing a rare-earth substance. The first molded article is then subjected to a deforming force and a second molded article is formed in which the orientation direction of the easy magnetization axis of the magnet material particles in at least the one section of the horizontal cross-section is changed to a direction which differs from the orientation direction of the first molded article. The second molded article is heated to a sintering temperature and kept at the temperature for a period of time.

Method for producing sintered body that forms rare-earth permanent magnet and has non-parallel easy magnetization axis orientation

This invention provides for a rotary electric machine that includes a rotor having a plurality of permanent magnets arranged in the circumferential direction, and in which the leakage of magnetic flux can be suppressed with a simple structure; and a rare-earth permanent magnet-forming sintered compact for forming rare-earth permanent magnets to be used in said rotary electric machine.

Sintered body for forming rare-earth permanent magnet and rotary electric machine having rare-earth permanent magnet

The present invention provides a permanent magnet unit in which insulating layers are located at positions where an eddy current can be reduced most effectively. The permanent magnet unit includes at least one insulating layer, and a plurality of permanent magnet pieces located adjacent to each other with the at least one insulating layer in between. The at least one insulating layer is located at positions defined based on a magnitude of an eddy current flowing inside a permanent magnet, corresponding to a change in a magnetic field of the permanent magnet into which a plurality of the permanent magnet pieces are integrally formed without the at least one insulating layer.

Permanent magnet unit, rotating machine having permanent magnet unit, and method for manufacturing permanent magnet unit

This invention provides for a rare-earth permanent magnet-forming sintered body having an integral sintered structure of magnet material particles containing a rare-earth substance. The integral sintered structure is formed in a three-dimensional shape having: a cross-section with a shape defined by a radially outer-side arc-shaped surface having a first curvature radius, a radially inner-side arc-shaped surface having a second curvature radius less than the first curvature radius and having an arc shape concentric with the outer-side arc-shaped surface; and a first end face and a second end face each of which is a radially-extending face along a virtual radial line extending from a curvature center of the arc shapes; and an axial length extending in a direction perpendicular to the cross-section.

Rare-earth permanent magnet-forming sintered body, and rare-earth permanent magnet obtained by magnetizing said sintered body

A method for coating with a coating liquid according to the present invention is a method for coating an object-to-be-coated with a coating liquid containing dispersed particles, using a die, wherein the flowage of the coating liquid within a manifoldprovided within the die is such that the deviation of the average flow rate of the coating liquid in the direction of the width becomes equal to or less than 60% of an average flow rate over the entire area of the manifold, in at least 80% of the area from a liquid supplying portionin the manifold to an end portion P of the manifold.

Method for coating with coating liquid, coating apparatuses for use therein, and method for designing the same

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Osaka, Japan

Makoto Fujihara