Method of fabricating bow stick of stringed instrument and bow stick of stringed instrument
AssigneeYamaha Corporation
InventorsAkio Yamamoto, Kazushi Nakai, Tatsuya Hiraku, Toshiharu Fukushima
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AssigneeYamaha Corporation
InventorsAkio Yamamoto, Kazushi Nakai, Tatsuya Hiraku, Toshiharu Fukushima
Estimating the term…
A method of fabricating a bow stick includes winding a prepreg, in which a fiber is impregnated with a resin, on a mandrel with a diameter gradually decreasing toward a distal end, setting a semi-fabricated product, in which the prepreg is wound on the mandrel, into a mold and molding the semi-fabricated product in a shape corresponding to a cavity formed between the mold and the mandrel by heating and pressurizing the semi-fabricated product in the mold, and taking out the mandrel from a molded product molded in the shape corresponding to the cavity to acquire a long and hollow stick body. When adjusting at least one of a weight distribution, a center of gravity, and a weight of the stick body, the volume of the cavity is changed using the mandrel of which the diameter or the diameter variation is gradually changed in an axis direction.
A method of fabricating a hollow bow stick body which is used in a stringed instrument and which is formed of fiber-reinforced plastics, the method comprising:
Dependencies are inferred from the claim text.