Mitsubishi Electric Corporation

Yuhei Awano

Kazuki Kubo

Takahiro Mabuchi

Sohei Samejima

Hajime Takeya

Michihito Matsumoto

Takayuki Inuzuka

Katsuhiko Horinouchi

Shigeyuki Yamamoto

Hiroki Kobayashi

Motohiro Sato

Akihiro Fujita

Kosei Tsuji

Tomonori Abe

Iwao Katsuno

Hideo Iinuma

Mitsuaki Nakata

Kazuhiko Yamashita

A method for producing a preform for manufacture of a fiber-reinforced plastic molding. The method includes: fixing a resin-equipped film rolled out from a roll state including a release film and a fixing resin and containing a partially-cured thermosetting resin, to a surface of the dry fiber fabric rolled out from a roll with the fixing resin interposed therebetween, thereby obtaining a first dry fiber fabric; separately fixing the resin-equipped film to a surface of the dry fiber fabric rolled out from a roll with the fixing resin interposed therebetween, and detaching the release film, thereby obtaining one or more second dry fiber fabrics; and laminating the second dry fiber fabrics on a surface of the first dry fiber fabric with the fixing resin of the second dry fiber fabrics interposed therebetween.

Method for producing preform and method for producing fiber-reinforced plastic molding

The liquid thermosetting resin composition of the present invention comprises an epoxy resin in which at least one selected from the group consisting of a linear epoxy resin having a degree of polymerization of 2 or more and an epoxy acrylate resin and at least one selected from the group consisting of a novolac-type epoxy resin and a naphthalene-type epoxy compound are linked to each other via an ether linkage, and which has a weight average molecular weight of from 2,000 to 10,000. When the liquid thermosetting resin composition of the present invention is used for insulating a stator coil of a rotating electric machine, mechanical characteristics can be improved without causing a reduction in the heat resistance.

Liquid thermosetting resin composition for insulating stator coil of rotating electric machine

A gas circuit breaker includes: a pair of electrodes provided so as to be able to come in contact with and separate from each other; and an insulating material that is placed so as to generate a decomposition gas in response to a direct or indirect action from an arc occurring between the pair of electrodes when a current is broken, wherein the decomposition gas generated from the insulating material when the current is broken is configured to be utilized for extinguishing the arc, and wherein an ablative material that does not include hydrogen atoms but has a carbon-oxygen bond in a main chain or ring part is used as the insulating material.

Gas circuit breaker

The present invention is a method for producing a fiber-reinforced plastic molding including, in the following order, the steps of: forming a preform laminate fixed to a molding die by laminating a plurality of preforms each including a dry fiber fabric and a fixing resin, the preforms being laminated through the fixing resin formed on a surface of the dry fiber fabric and including a partially-cured thermosetting resin exhibiting tackiness at a room temperature; impregnating the dry fiber fabric, provided in the preform laminate fixed to the molding die, with a liquid thermosetting resin; curing the liquid thermosetting resin and the fixing resin to form a fiber-reinforced plastic molding; and demolding the fiber-reinforced plastic molding from the molding die.

Method for producing fiber-reinforced plastic molding, preform and method for producing same, and adhesive film

A primary molding product is formed by integrally forming a first lead frame and a second lead frame with a primary molding resin portion. In addition, in order to prevent separation of the first lead frame and the second lead frame from the primary molding resin portion, a hook-and-hold portion for preventing separation of the first lead frame from the primary molding resin portion and separation of the second lead frame from the primary molding resin portion is provided on an outer surface of each of the first lead frame and the second lead frame. Thus, a resin molding part capable of achieving suppression of increase in a thickness thereof without deformation or displacement of a lead frame and a manufacturing method thereof can be provided.

Resin molding part and manufacturing method thereof

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Chiyoda-ku, Japan

Yuhei Awano