Toray Industries, Inc.

Shimano Inc.

Shigeo Iwasawa

Toshiya Kamae

Hiroki Oosedo

Go Tanaka

Yukitane Kimoto

Toshihide Sekido

Shin Tanabe

Tatsuya Senba

Disclosed are a method for manufacturing a crank for a bicycle by bonding structural members to each other with an adhesive comprising; a step for applying the adhesive in a line-like or dot-like form in correspondence with an intervention region of the adhesive; a step for disposing a fabric in correspondence with the intervention region of the adhesive; a step for expanding the adhesive applied in a line-like or dot-like form in the fabric; and a step for bonding the structural members to each other with the adhesive expanded in the fabric, and a crank for a bicycle manufactured by the method. When the crank for a bicycle is manufactured by bonding the structural members to each other with the adhesive, the adhesive can be applied easily at a high accuracy and a good repeatability, variations of application condition and amount of used adhesive can be suppressed, and variation in quality can be suppressed.

Crank for bicycle and method for manufacturing the same

An RTM molding method includes disposing a reinforcing fiber substrate in a cavity of a mold consisting of a plurality of dies, clamping the mold, and thereafter injecting resin to complete molding, characterized in that divided areas with respect to the surface direction of the reinforcing fiber substrate are assumed, each divided area is one in which injected resin expands over the entire surface in the area and can be substantially uniformly impregnated in the thickness direction of the substrate, and resin introducing paths are formed for respective assumed divided areas for introducing the injected resin into the respective divided areas; and an RTM molding device. When a relatively large molded product is to be molded, a molding step from resin injection to impregnating/curing can be implemented at high speed without generating a non-resin-flowing area, thereby enabling a high-quality molded product to be produced free from voids, etc., with a molding time shortened and production speed and volume increased.

RTM molding method and device

An epoxy resin composition comprises (a) an epoxy resin, (b) an anionic polymerization initiator and (c) from 1 to 30 parts by weight per 100 parts by weight of epoxy resin (a) of an aromatic ring-containing proton donor of a polyhydric alcohol and/or a polymercaptan.

Injection molding thermosetting resin composition into reinforcing fiber substrate

Epoxy resin composition, process for producing fiber-reinforced composite materials and fiber-reinforced composite materials

Growing community of inventors

Ehime, Japan

Shigeo Iwasawa