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    • 9. 发明授权
    • Carbon fiber arrow and continuously winding method thereof
    • 碳纤维箭头及其连续卷绕方法
    • US06251036B1
    • 2001-06-26
    • US09516576
    • 2000-03-01
    • Xiang WuQingzhu MaoWenhao ChenDahai SunMinyong LiuWeifang Chen
    • Xiang WuQingzhu MaoWenhao ChenDahai SunMinyong LiuWeifang Chen
    • F42B604
    • F42B6/04
    • A carbon fiber arrow shaft comprises a hollow tube, a reinforced carbon fiber, and a resinoid binder. The hollow tube has a length between 500-900 mm, an inner diameter between 2-10 mm, and a tube wall thickness between 0.3-2 mm. The reinforced carbon fiber and the resinoid binder form a resin-impregnated carbon fiber. The carbon fiber arrow shaft is formed by directly and continuously winding the resin-impregnated carbon fiber around the hollow tube. The carbon fiber arrow shaft has a head section (L1), a middle section (L2) and a tail section (L3). A winding angle of the carbon fiber at the head section (L1) is changed from a larger winding angle to a smaller winding angle, a winding angle at the middle section (L2) stays constant, and a winding angle at the tail section (L3) is changed from a smaller winding angle to a larger winding angle. The lengths of the head section (L1) and the tail section (L3) are between 25-250 mm. The initial winding angle at the head section (L1) is between 30-90 degrees and is gradually decreased to between 2-30 degrees at the boundary of the head section (L1) and the middle section (L2). The winding angle at the middle section (L2) stays constant, and the winding angle at the tail section (L3) is gradually increased from between 2-30 degrees at the boundary of the middle section (L2) and the tail section to between 30-90 degrees at the end of the tail section (L3). The peripherally located winding angles at both the head section (L1) and the tail section (L3) are at least two times the winding angle at the middle section (L2). The shaft provides uniformity of wall thickness and eliminates overlapping joints or surface protrusions.
    • 碳纤维箭头轴包括中空管,增强碳纤维和树脂粘合剂。 中空管的长度为500-900mm,内径在2-10mm之间,管壁厚在0.3-2mm之间。 增强碳纤维和树脂粘合剂形成树脂浸渍的碳纤维。 碳纤维箭头轴通过将树脂浸渍的碳纤维直接且连续地缠绕在中空管周围而形成。 碳纤维箭头轴具有头部(L1),中间部(L2)和尾部(L3)。 在头部(L1)处的碳纤维的卷绕角度从较大的卷绕角度变为较小的卷绕角度,中间部分(L2)处的卷绕角度保持恒定,并且在尾部(L3 )从较小的卷绕角度变化到较大的卷绕角度。 头部(L1)和尾部(L3)的长度在25-250mm之间。 头部(L1)的初始卷绕角度在30-90度之间,并且在头部(L1)和中间部分(L2)的边界处逐渐减小到2-30度之间。 中间部分(L2)处的卷绕角度保持恒定,并且尾部(L3)处的卷绕角度从中间部分(L2)和尾部部分的边界处的2-30度之间逐渐增加到30 -90度在尾部(L3)的末端。 在头部部分(L1)和尾部部分(L3)处的外围定位的卷绕角度至少是中间部分(L2)处的卷绕角度的两倍。 轴提供壁厚均匀性,消除重叠的接头或表面突起。