Toyota Jidosha Kabushiki Kaisha

Yasushi Yamazawa

Katsumi Kondo

Masaki Terada

Yasuhiro Tsuchiya

Takatsune Niimi

Takashi Yamamoto

Kunihiro Matsuba

Yasuhiro Tsutiya

Tosio Aoki

Takuya Kondo

Hiroyuki Sato

Yoshinao Suzuki

Yasunori Sakurabayashi

Marc Monthioux

Shinji Koike

Mikako Le Lay

A method is presented for effectively manufacturing multi-wall (double-wall, etc.) carbon nanotubes (CNTs) having a structure whereby interior tubes are formed within the CNTs. In this manufacturing method, fullerene/CNT hybrid structures are prepared, wherein assembled fullerenes, these being fullerenes that are linked, have been housed within single-wall CNTs. The interior tubes are formed from the assembled fullerenes by subjecting the hybrid structures to electron beam irradiation while in a heated state. It is preferred that irradiation with the electron beams occurs at a temperature of 100&#x2dc;500&#xb0; C. and with the electron beams having an accelerating voltage of 80&#x2dc;250 kV. According to the manufacturing method of the present invention, multi-wall CNTs with few defects can be manufactured at lower temperatures and in a shorter period than in the case where the fullerene/CNT hybrid structures are only maintained under high temperature conditions (and electron beam irradiation is not performed).

Methods for manufacturing multi-wall carbon nanotubes

A method for the manufacture of a fiber reinforced plastic structure, comprising the steps of winding a continuous long-staple fiber impregnated with a liquid resin around a plurality of winding jigs until the resultant bundle of resin impregnated fibers attains a predetermined thickness; setting rings tightly in place on the linear portions of the resin impregnated fiber bundle between the jigs; and moving the tightly set rings relative to the linear portions thereby wringing the resin impregnated fiber bundle and expelling bubbles entrapped within the fiber bundle.

Method for production of fiber reinforced plastic structure

A steering wheel core material of continuous filament FRP for vehicles which is made up of a ring, a boss positioned at the center of the ring, and spokes connecting the boss to the ring, said boss being integrally joined to a boss metal fitting. It is formed by winding resin-impregnated continous filaments in layer around the ring- and spoke-forming mold and the body of the boss metal fitting, with an elastic material interposed between the body of the boss metal fitting and the FRP.

Steering wheel core material

A core for a steering wheel made of a long fiber-reinforced resin in which a ring portion, a boss portion and a three spoke portions including a first spoke portion, a second spoke portion and a third spoke portion extending in a generally T-shaped configuration from the ring portion to the boss portion, are formed by bundles of continuous fibers reinforced with a resin. The cross-sectional area for the second spoke portion situated between the first spoke portion and the third spoke portion is made smaller than the cross-sectional area for the first spoke portion and the third spoke portion.

Core material for steering wheels made of long fiber-reinforced resin

A process for preparing a fiber reinforced plastic structure having points of branching, which comprises the steps of, positioning pins at points of branching in the structure and repeatedly hanging and repeatedly stretching a resin-impregnated strand of continuous long-staple fibers over and between said pins, thereby completing the structure of the points of branching.

Process for preparing a fiber-reinforced plastic structure having

A steering wheel made of resin, wherein a reinforcement, as a core of the steering wheel, consists of reinforcing members corresponding to a ring part, a sub-ring part and spoke parts, which are formed of windings and by hardening of a strand of continuously long fiber impregnated with a resin for hardening, after being wound onto the ring part, the sub-ring part and the spoke parts via a boss and spacers which are disposed at the joints between the ring part, the sub-ring part and the spoke parts.

Steering wheel

A method for the manufacture of a fiber reinforced resin structure having branched portions comprising, winding a long continuous resin impregnated fiber strand repeatedly on a molding jig having a predetermined structure, winding said fiber strand tightly around each of the branched portions of the structure, and hardening said resin.

Method for manufacture of fiber reinforced resin structure such as a

A core material for steering wheels, comprising a boss equipped with sleeves in a unitary structure, each of which sleeves has a slit in the axial direction thereof, said sleeves further being packed with superposed fiber strands; a ring portion; and spoke portions which connect said ring portion to said boss and being formed by winding and stretching continuous long-staple fiber strands impregnated with a resin to form the superposed strands within said sleeves.

Growing community of inventors

Toyota, Japan

Yasushi Yamazawa