Fuji Jukogyo Kabushiki Kaisha

Riso Kagaku Corporation

Atsushi Harada

Yasuhiro Toi

Kazuaki Amaoka

Masahiro Noda

Takayuki Nagao

Shigeki Tanaka

Naoya Takizawa

Hideyuki Sano

Megumi Hiraki

Junji Miura

Noboru Inamine

Eikatsu Yamaguchi

Seiji Maruyama

Sano Hideyuki

A composite material-stiffened panel has a skin obtained by molding a fiber-reinforced resin composite material into a flat skin, stiffeners arranged in rows on one surface of the skin, and a fiber-reinforced resin-composite material stitched on the skin covering the stiffeners. The composite material-stiffened panel can be manufactured as follows: A first fabric material is placed on a tool having a panel-shaped surface. Stiffeners are placed on the first fabric materials. A second fabric material is placed on the stiffeners to cover at least some of the stiffeners. The second fabric materials are reformed to match the shape of the stiffeners. The reformed second fabric material is stitched on the first fabric material along edges of the stiffeners. All the materials are covered with a bagging film for vacuum. Resin is infiltrated into the fabric materials by a RTM or a RFI method. The infiltrated resin is heated to be hardened.

Composite material-stiffened panel and manufacturing method thereof

There is provided a method for manufacturing a structural body comprising: a structural body formation step of forming the structural body by combining a plurality of constituent members through a bonding adhesive; a closed space formation step of disposing the structural body into a pressurizing or heating unit, forming a closed space with at least one of the structural body and the pressurizing or heating unit, and charging an elastic body into the closed space; a hardening step of fixing or hardening the bonding adhesive through the elastic body by the pressurizing or heating unit; and a discharge step of discharging the elastic body from the closed space.

Method for manufacturing a structure

A method of fabricating a panel of composite material. The panel includes two outside skins and stringers attached inside of the two outside skins for reinforcing the two outside skins. A plurality of stringers for reinforcing outside skins is formed from dry preformed fibers and are disposed at a predetermined interval.

Panel of composite material and method of fabricating the same

An lower skin portion structure is integrally molded by employing a front spar and a rear spar having rib posts, lower stringers, a lower skin prepreg, and lower rib chord prepregs, then an upper skin portion structure is integrally molded by employing upper stringers, an upper skin prepreg, and upper rib chord prepregs, then ribs are fastened to the rib posts and the lower rib chords of the lower skin portion structure by mechanical fastening device, and then the lower skin portion structure and the upper skin portion structure are coupled by fastening the upper skin portion structure to the front spar and the rear spar by fasteners and then fastening upper rib chords of the upper skin portion structure to the ribs by the mechanical fastening device, whereby a composite material wing is manufactured.

Method of manufacturing a composite material wing and a composite material wing

A wing of composite material has an upper skin, a lower skin and a plurality of intermediate spars arranged between the upper and the lower skin. The intermediate spars extend from roots to tips of the upper and the lower skins. The intermediate spars are integrally formed with the upper and the lower skins or are adhesively bonded to the upper and the lower skins. The wing has a small number of parts, needs greatly reduced time for fabrication and can be fabricated at a low cost.

Method of fabricating a wing of composite material

Wing of composite material and method of fabricating the same

A panel of composite material including two outside skin parts, a plurality of stringers, connecting members for connecting the plurality of stringers, and a reinforcing member connecting the two outside skin parts with each other. Each of the two outside skin parts is formed into one body. A portion protruding upward from the plurality of stringers is provided on the connecting members, and is connected to the reinforcing member by a fastener.

In an ink supply control device for a stencil printing machine which controls the supply of printing ink to an ink reservoir formed in a printing drum according to a signal produced from an ink amount detecting device which produces a first signal when the amount of ink stored in the ink reservoir is detected to be greater than a prescribed level, and a second signal when the amount of ink stored in the ink reservoir is detected to be less than the prescribed level, time durations of the first and second signals over a certain time interval or a certain interval of the rotation of the angle of the printing drum are evaluated as a basis for determining true insufficiency of the level of the printing ink in the ink reservoir through an arithmetic computation to the end of preventing erroneous detection by the ink amount detecting device from adversely affecting the control of the supply of printing ink in the ink reservoir. Such erroneous detection of the level of ink is typically caused by disturbances of short durations in the surface of the ink in the ink reservoir.

Growing community of inventors

Tokyo-to, Japan

Atsushi Harada