Ntn Corporation

Norikazu Muneda

Kazuo Hirose

Eiichirou Shimazu

Yoshio Oki

Naonari Tanigawa

Hirohisa Abe

Hikaru Araki

To provide a non-oil-impregnated sliding bearing having superior low friction capable of suppressing an increase of a shaft temperature in a continuous use, and a bearing apparatus and an image forming apparatus provided with the sliding bearing. Sliding bearingstosupport rotation shafts on cylinder inner surface in a rotatable manner. Each of the sliding bearingstois formed of a molded member of a non-oil-impregnated resin composition that does not contain oil. The resin composition contains an injection-moldable ultrahigh molecular weight polyethylene resin as a base resin, a polytetrafluoroethylene resin as an additive, and an acicular inorganic filler having Mohs hardness of 3 or less. The resin composition contains 65 vol % or more of the ultrahigh molecular weight polyethylene resin, 5-25 vol % of the polytetrafluoroethylene resin, and 1-20 vol % of the acicular inorganic filler, based on the whole of the resin composition.

Sliding bearing, bearing apparatus, and image forming apparatus

Provided is a powder for a magnetic core (), including a soft magnetic metal powder (); and an insulating coating film () covering a surface of the soft magnetic metal powder (), in which the insulating coating film () is formed of an aggregate of crystals () obtained by cleaving a layered oxide. The crystals () are obtained by, for example, cleaving a swellable smectite-group mineral, which is one kind of swellable layered clay mineral as the layered oxide.

Powder for magnetic core and powder magnetic core

A swash plate, for a swash plate compressor, which is excellent in resistance to the occurrence of seizing in a condition where an extreme pressure is generated owing to local contact between the swash plate and a shoe which slides thereon and in a condition where lubricating oil is depleted, capable of preventing cavitation-caused erosion of a resin film when the swash plate is operated at a high surface pressure and a high speed in the presence of the lubricating oil and the swash plate compressor having the swash plate. A swash plate () for a swash plate compressor is so constructed that inside a housing () where a refrigerant is present, the refrigerant is compressed and expanded by converting a rotational motion of the swash plate () mounted perpendicularly and obliquely on a rotational shaft ().

Swash plate for swash plate compressor and swash plate compressor

A sheet feed rolling element for an electrophotographic device includes a roller portion and shoulders on both sides formed by curved chamfers. A parting line between the fixed mold plate and the movable mold plate of an injection mold is located at the boundary between one shoulder and the roller portion outer periphery, a step is provided at the boundary due to a difference between the opening diameter of the cavity portion defined by the fixed mold plate and the opening diameter of the cavity portion defined by the movable mold plate so the one shoulder has a smaller diameter than the outer peripheral surface, and a chamfer is provided adjacent to the one shoulder to absorb any difference in molding shrinkage rate due to a difference in molecular orientation of resin at the step, thereby preventing circumferential bulging on the outer periphery of the formed roller portion.

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Mie, Japan

Norikazu Muneda