Fukui Prefectural Government

Honda Motor Co., Ltd.

Subaru Corporation

Keiichi Kondo

Kazumasa Kawabe

Hirofumi Iyo

Shuichiro Yoshida

Kohei Yamada

Shin Kaechi

Natsumi Yasukochi

Kei Koiwai

Hideki Sasayama

Shigekazu Uchiyama

A molding method for a composite sheet used for manufacturing a thermosetting resin prepreg sheet in which a thermosetting resin material is impregnated into a fiber sheet includes: bringing a resin transfer sheet in which the thermosetting resin material of a predetermined thickness is carried on one surface of a transfer sheet into contact with one surface of the fiber sheet to be stacked on the fiber sheet. The resin transfer sheet and the fiber sheet in the stacked state are subjected to a heating treatment or heating and pressurizing treatment. The resin transfer sheet and the fiber sheet in the heated and stacked state is subjected to a cooling treatment or cooling and pressurizing treatment so that the thermosetting resin material is transferred to the fiber sheet and the thermosetting resin material is made to adhere to one surface side of the fiber sheet.

Molding method and molding device for composite sheet

The present invention is intended to provide automated lamination method and device that can efficiently perform automated lamination by using a thin-layer tape. A thin-layer tape automated lamination deviceincludes a provisional formation unitconfigured to form lamination tapes having thicknesses different from each other by laminating a plurality of thin-layer tapes each having a thickness of 5 &#x3bc;m to 80 &#x3bc;m, and a lamination-shaping unitconfigured to laminate and shape each formed lamination tape in a lamination region of a basal body surface.

Thin-layer tape automated lamination method and device

According to one implementation, a fiber width adjustment device includes: a feeder and an adjuster. The feeder feeds a tape material in a length direction of the tape material. The tape material consists of fibers for a fiber reinforced resin after or before the fibers are impregnated with a resin. The adjuster has a path for the tape material. The path is formed by at least a bottom and a pair of wall surfaces. The interval of the wall surfaces decreased gradually. The width of the tape material which passed the path is changed by adjusting a part of the path. The tape material passes through the part of the path while contacting with the bottom and the wall surfaces.

Fiber width adjustment device, fiber width adjustment method and composite material molding method

A quasi-isotropic reinforced sheet material T formed by integrating a plurality of chopped semi prepreg sheet materials C including a reinforced fiber material and a thermoplastic resin material set in an unimpregnated state such that fiber directions of the reinforced fiber materials are oriented randomly in the two-dimensional direction. The average number of fibers in a thickness direction for materials C ranges is from two to ten and a thickness 't', relative to the thickness (t) in an impregnated state, is in a range of t&#x3c;t&#x2264;2&#xd7;t. A layered body M is obtained by bonding and integrating the materials C in a state where fiber directions of the reinforced fiber materials are oriented randomly in a two-dimensional direction and the materials C overlap such that the average number of the materials C in the thickness direction is set in a range from two to ten.

Quasi-isotropic reinforced sheet material and production method thereof

A method for producing a molded article of a fiber-reinforced plastic include molding a fiber-resin mixture containing an inorganic reinforcing fiber and a thermosetting resin under heat and pressure. The elapsed time since the thermosetting resin reached a molding temperature at which a hardening reaction proceeds is measured, the loss angle &#x3b4; of the thermosetting resin is measured in a dynamic viscoelasticity measurement, and the relationship between the elapsed time and the loss angle &#x3b4; is evaluated to calculate the range of the elapsed time, within which the loss angle &#x3b4; is 0.55 to 1.57 rad after the loss angle &#x3b4; reached the maximum value, as the pressurization start range. The fiber-resin mixture is heated to the molding temperature and pressure application to the fiber-resin mixture is started within the pressurization start range, to obtain the molded article of the fiber-reinforced plastic.

Method for producing molded article of fiber-reinforced plastic

The present invention has an object to provide a laminated molded body in which a thin fiber reinforced layer is laminated and having a favorable strength characteristic. The laminated molded body () includes a laminated portion (a laminated portion of SRon an upper side and SR, for example) in which fiber reinforced layers SRto SR, each having a thickness of 20 to 80 &#x3bc;m in which a reinforcing fiber material is dispersed in a thermosetting resin material which serves as a matrix, are laminated, and a laminated portion in which a resin layer is laminated between the fiber reinforced layers (a laminated portion of SRon the upper side, TP, and SR, for example).

Laminated molded body

A matrix material for a carbon fiber-reinforced composite comprises a matrix resin as a resin component. The matrix resin contains both a first epoxy resin and a second epoxy resin or only the first epoxy resin, further contains a third epoxy resin, and has an average epoxy equivalent weight of 109 to 162. The first epoxy resin contains a polyfunctional glycidylamine-type epoxy resin. The second epoxy resin contains at least one of a p-aminophenol-type epoxy resin and a tetramethylbiphenol-type solid epoxy resin. The third epoxy resin contains a bisphenol A-type epoxy resin having a weight-average molecular weight of 8000.

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Fukui, Japan

Keiichi Kondo