Mitsubishi Gas Chemical Company, Inc.

Gifu University

Sumitomo Rubber Industries Limited

Murata Machinery, Ltd.

Sumitomo Riko Company Limited

Akio Ohtani

Asami Nakai

Nobuhiko Matsumoto

Tadashi Uozumi

Hiroto Ito

Fumiya Hirano

Nobuki Hirooka

Masataka Kaji

Mitsuro Takagi

Takehiko Hyodo

Yumi Kanemitsu

Ryosuke Tahara

Yasuhiko Mihara

Shigemitsu Hattori

Provided is the method for manufacturing a three-dimensional structure with a less amount of internal voids or bubbles, and also to provide a 3D printer filament used for manufacturing such three-dimensional structure. The method for manufacturing a three-dimensional structure, the method comprises melting and depositing a filament using a 3D printer, the filament comprising a commingled yarn that contains a continuous reinforcing fiber (A) and a continuous thermoplastic resin fiber (B), with a dispersity of the continuous reinforcing fiber (A) in the commingled yarn of 60 to 100%.

Method for manufacturing three-dimensional structure, and 3D printer filament

Provided is a method for manufacturing a three-dimensional structure, capable of yielding a three dimensional structure that excels in buildability. The method for manufacturing a three-dimensional structure, comprises melting a filament that contains a thermoplastic resin by using a 3D printer, and depositing it onto a base, and comprising bonding the filament at one end of the filament to a surface of the base so as to achieve a bond strength to the base of 15 N or larger, and discharging the filament through a nozzle of the 3D printer onto a surface of the base so as to deposit thereon, while moving at least one of the base or the nozzle.

Method for manufacturing three-dimensional structure

Method for manufacturing a three-dimensional structure

Provided is a composite material capable of keeping a good appearance even after heat processed, a method for manufacturing a composite material and a method for manufacturing a molded article. The composite material of the present invention contains a commingled yarn that contains a continuous reinforcing fiber (A) and a continuous thermoplastic resin fiber (B) as fiber components thereof; and a thermoplastic resin fiber (C) that keeps the commingled yarn in place, a thermoplastic resin that composes the thermoplastic resin fiber (C) having a melting point 15&#xb0; C. or more higher than the melting point of a thermoplastic resin that composes the continuous thermoplastic resin fiber (B).

Composite material, method for manufacturing composite material, and method for manufacturing molded article

Provided is method for manufacturing a molded article that has a first portion, and a second portion that rises up from the first portion, the method comprising: placing a second material on a surface of a first material; the first material containing a reinforcing fiber (A) with a length exceeding 30 mm and a thermoplastic resin (B), the reinforcing fiber (A) being dispersed in the first material, and, the thermoplastic resin (B) being not substantially impregnated into the reinforcing fiber (A), and the second material containing a reinforcing fiber (a) with a length of 1 to 30 mm and a thermoplastic resin (b), the reinforcing fiber (a) being dispersed into the second material, and, the thermoplastic resin (b) being not substantially impregnated into the reinforcing fiber (a), and simultaneously forming the first portion and the second portion by one stroke of pressing, with a cohesive strength of the thermoplastic resin (B) and the thermoplastic resin (b) of 2 N/15 mm or larger, where the cohesive strength being measured by stacking a 15 mm-wide, 0.03 mm-thick film derived from the thermoplastic resin (B), and a 15 mm-wide, 0.03 mm-thick film derived from the thermoplastic resin (b); pressing the stack under a pressure of 0.1 MPa, at a temperature 1&#xb0; C. higher than the melting point of the thermoplastic resin (B) or the thermoplastic resin (b), whichever is higher, for two seconds, so as to heat seal the films partially; pulling the films at unsealed portions in the direction 180&#xb0; away from each other; and finding the force at which the heal-sealed portion separates, or the force at which the resin films rupture before being separated.

Method for manufacturing molded article

A method of manufacturing an elongated resin molded article having a hollow structure including: using an elongated elastic core including a composite of an elastic body and a continuous yarn; molding a resin material on an outer peripheral surface of the elastic core; and then exerting tensile force on the elastic core and extracting the elastic core in a lengthwise direction so as to obtain the elongated resin molded article having the hollow structure. An elongated resin molded article having a hollow structure, including a curved portion and a branched portion in combination, wherein the resin molded article has a composite structure in which a resin material is reinforced with a braided continuous fiber across an entire length thereof including the curved portion and the branched portion.

Method of manufacturing resin molded article and resin molded article

To provide a lightweight shaft having excellent strength, a shaft has one or a plurality of fiber reinforced resin layers. At least one of the fiber reinforced resin layers is produced by a filament winding method in which one or a plurality of fiber bundles are wound while tension is applied thereto. The fiber bundles each include a plurality of filaments. The tension applied to the fiber bundles is not less than 0.04 (gf) per filament. The tension is great. Preferably, at least one of the fiber reinforced resin layers is produced by a multi-filament winding method in which a plurality of the fiber bundles are simultaneously wound while being arranged side by side. Preferably, fibers forming the filaments are carbon fibers. Preferably, a resin composition included in each fiber reinforced resin layer is an epoxy resin composition.

Golf club shaft

A braider and a tube body in which braids are arranged on an outer peripheral surface of a mandrel uniformly even if the diameter of the mandrel is uneven. A braiderhas bobbin carrier conveyance mechanismsA andB in which bobbin carriersA andB are conveyed from traveling tracks Wand Wto an outside of the traveling tracks Wand Wso as to stop winding of braids Yand Yonto a mandreland the bobbin carriersA andB are conveyed from the outside of the traveling tracks Wand Wto the traveling tracks Wand Wso as to start the winding of the braids Yand Yonto the mandrel

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Gifu, Japan

Akio Ohtani