Chio
Chio Ishihara, Chiba JP
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20100051851 | IRON-BASED SOFT MAGNETIC POWDER FOR DUST CORE, METHOD FOR PRODUCING THE SAME AND DUST CORE - Disclosed herein is an iron powder for dust cores which effectively keeps insulation among iron powder particles and excels in mechanical strength even though the amount of insulating material is reduced to achieve high-density forming and which also exhibits good thermal stability necessary for electrical insulating properties even after heat treatment at high temperatures. | 03-04-2010 |
Chio Ishihara, Matsudo JP
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20080267807 | CORE ROD FOR FORMING A CYLINDRICAL GREEN COMPACT, APPARATUS FOR FORMING A CYLINDRICAL GREEN COMPACT, AND METHOD FOR FORMING A CYLINDRICAL GREEN COMPACT - A core rod for forming a cylindrical green compact having an axial protrusion or a radial step portion or dent portion on an inner surface of the cylindrical member by powder compaction, wherein: the core rod is provided with a step portion protruding in a radial direction at least a part on an outer surface thereof; the core rod is divided into two parts, an upper core and a lower core, on a plane that is flush with an upper surface of the step portion; and the upper core and lower core are mechanically joined with fastening members or bonded with an adhesive on a plane along which the core rod is divided. | 10-30-2008 |
Chio Ishihara, Matsudo-Shi JP
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20080230737 | Method for producing soft magnetic powered core - A method for producing a soft magnetic powdered core comprises a mixing step for forming a raw powder by adding a thermoplastic resin powder to a soft magnetic powder and mixing them, a compacting step for forming a compact by compacting the raw powder into a predetermined shape, a melting and setting step for the resin in which the resin of the compact is melted by heating to at least the melting point of the thermoplastic resin and the melted resin is set by cooling to a room temperature, and a crystallizing step for the resin in which the set resin is heated to not less than the exothermic onset temperature and not more than the endothermic onset temperature, which are measured by DSC analysis of the thermoplastic resin, and is cooled to a room temperature. | 09-25-2008 |
20080232995 | Method for producing soft magnetic powdered core - A method for producing a soft magnetic powdered core includes preparing a mixture of a soft magnetic powder and a resin powder, compacting the mixture into a predetermined shape so as to obtain a compact, and heating the compact. The resin powder has a median size of not more than 30 μm, a maximum particle size of not more than 100 μm, and a specific surface area of not less than 1.0 m | 09-25-2008 |
Chio Ishihara, Katsushika-Ku JP
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20130015939 | POWDER MAGNETIC CORE AND METHOD FOR PRODUCING THE SAMEAANM Inagaki; TakashiAACI Matsudo-shiAACO JPAAGP Inagaki; Takashi Matsudo-shi JPAANM Ishihara; ChioAACI Katsushika-kuAACO JPAAGP Ishihara; Chio Katsushika-ku JP - The present invention provides a powder magnetic core which has a low iron loss and an excellent constancy of magnetic permeability and is suitably used as a core for a reactor mounted on a vehicle. The powder magnetic core is a compact of a mixed powder containing an iron-based soft magnetic powder having an electrical insulating coating formed on its surface and a powder of a low magnetic permeability material having a heat-resistant temperature of 700° C. or higher than 700° C. and a relative magnetic permeability of not more than 1.0000004. The density of the compact is 6.7 Mg/m | 01-17-2013 |
20130056674 | POWDER MAGNETIC CORE AND PROCESS FOR PRODUCTION THEREOF - A powder magnetic core of the present invention is a powder magnetic core that includes an insulating layer containing a particulate metal oxide between metal powders, in which the insulating layer contains Ca, P, O, Si, and C as elements. According to the present invention, it is possible to provide a powder magnetic core in which securing of a constant permeability characteristic under a high magnetic field and decrease in core loss are compatible with each other, and a method for producing the powder magnetic core. | 03-07-2013 |
Chio Ishihara, Katsushika-Ku, Tokyo JP
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20160071637 | POWDER MAGNETIC CORE FOR REACTOR - Provided is a powder magnetic core for a reactor, whose electromagnetic properties are difficult to change with time, even when applied to a reactor used in a state that the core is exposed without being potted. The powder magnetic core for a reactor consists essentially of a compact composed of an insulation-coated iron-based soft magnetic powder that an insulating film is formed on the surface of an iron-based soft magnetic powder, and which has such a change with time of 500 hours at 180° C. that a ratio of decrease in effective magnetic permeability being 1% or less. In the compact, the content of gapping between two adjacent particles of the insulation-coated iron-based soft magnetic powder is 2 vol % or less. | 03-10-2016 |