The Japan Steel Works, Ltd.

Sanwakogyo Ltd.

Hirokazu Madarame

Toshifumi Nakajima

Shinji Tanaka

Kazuhiro Miyagi

Yasushi Owaki

Ritsu Miura

Masahiro Uchida

An object of the present invention is to provide a motor rotor support suitable for an axial gap motor and a method for manufacturing the same. The motor rotor support for supporting a magnetic body disposed on a rotor of the motor is configured by laminating single materials each formed from a hot-worked material or a cold-worked material preferably composed of an 18Mn-18Cr nonmagnetic steel.

Motor rotor support and method for manufacturing same

An object of the present invention is to provide a motor rotor support suitable for an axial gap motor and a method for manufacturing the same. The motor rotor support for supporting a magnetic body disposed on a rotor of a motor is configured by a nonmagnetic steel having a relative permeability of less than 1.005 and a 0.2% yield strength at room temperature of 550 MPa or more.

Nonmagnetic high strength steel motor rotor support and method for manufacturing same

The present invention relates to a process for producing sinters, including a steps of mixing a powder material with a binder, injection molding the mixture, and then dewaxing and sintering the resulting injection molded article, wherein the binder comprises at least one of: copolymer, a mixture of copolymer, paraffine wax, carnauba wax, a mixture of the paraffine wax and the carnauba wax, a plasticizer, and a lubricant. According to the present invention, the dewaxing step comprises heating the injection molded article to a temperature of 250.degree.-500.degree. C. in a heating rate of 5.degree.-100.degree. C./hour under the pressure not higher than 1 Torr in order to remove 40%-95 % by weight of the binder components. Further, the temperature elevation in the sintering step is started in a vacuum atmosphere and replacing the atmosphere with an inert gas atmosphere in the process of temperature elevation.

Process for producing sinters and binder for use in that process

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Muroran, Japan

Hirokazu Madarame