发明名称 弦楽器用弓竿の製造方法
摘要 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.
申请公布号 JP5899820(B2) 申请公布日期 2016.04.06
申请号 JP20110241461 申请日期 2011.11.02
申请人 ヤマハ株式会社 发明人 山本 暁夫;仲井 一志;平工 達也;福島 敏晴
分类号 G10D3/16;G10D1/00 主分类号 G10D3/16
代理机构 代理人
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