Patent ID: 8101040

Claim:
A method of producing a fusion-bonded body including a fusion-bonded part made of a first to-be-fusion-bonded part comprising first thermoplastic resin and first carbon fibers and a second to-be-fusion-bonded part comprising second thermoplastic resin and second carbon fibers, the first and second to-be-fusion-bonded parts being fusion-bonded to each other, the method comprising: forming the fusion-bonded part by bringing the first to-be-fusion-bonded part and the second to-be-fusion-bonded part into contact with each other, flowing current through both to-be-fusion-bonded parts to heat themselves, and melting and solidifying the first thermoplastic resin and the second thermoplastic resin together, wherein, the fusion-bonded body is produced by fusion-bonding a first resin part made of a material containing at least the first thermoplastic resin, the first resin part including the first to-be-fusion-bonded part, and a second resin part made of a material containing at least the second thermoplastic resin, the second resin part including the second to-be-fusion-bonded part, thereby forming the fusion-bonded part, the first to-be-fusion-bonded part is formed to have a larger content of the first carbon fibers than another portion of the first resin part, the second to-be-fusion-bonded part is formed to have a larger content of the second carbon fibers than another portion of the second resin part, the first to-be-fusion-bonded part includes groups of first perpendicular carbon fibers oriented in a direction perpendicular to a first contact surface to be brought into contact with the second to-be-fusion-bonded part, and the second to-be-fusion-bonded part includes groups of second perpendicular carbon fibers oriented in a direction perpendicular to a second contact surface to be brought into contact with the first to-be-fusion-bonded part.