Capturing of Real Image of Neck-Like Deformation from High-Speed Melt Spinning Line
Capturing of Real Image of Neck-Like Deformation from High-Speed Melt Spinning Line
复制标题
高速熔体纺丝生产线颈状变形的真实图像捕捉
DOI：
10.2115/fiber.50.12_561
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
N. Okui
中科院分区：
文献类型：
--
作者：
T. Kikutani;Y. Kawahara;Naoki Ogawa;N. Okui
利用摄像机对高速纺丝线进行了观测，直接获得了颈缩变形的详细直径分布。通过在通常的望远镜型光学系统上添加一组柱面透镜来开发光学系统。该系统将水平方向放大为垂直方向的四倍。利用该装置成功拍摄到了聚对苯二甲酸丁二酯高速样条线中颈状变形的图像。虽然颈状变形的形状比未拉伸纤维的冷拉伸中观察到的“颈缩”的形状更温和，但计算的颈状变形终点处的速度梯度显示出极高的ca值。10和30 ms-1的卷绕速度为4和5 km/min。
Observation of high-speed spinline using a video camera was carried out to obtain directly the detailed diameter profiles of neck-like deformation. An optical system was developed by adding a set of cylindrical lenses to the usual telescope-type optical system. This system magnified the horizontal direction four times larger than that in the vertical direction. Using this apparatus, the image of the neck-like deformation in high-speed splinline of poly (butylene terephthalate) was successfully captured. Although the shape of the neck-like deformation was more moderate than that of the “necking” observed in the cold-drawing of undrawn fibers, the calculated velocity gradient at the end point of the neck-like deformation showed extremely high values of ca. 10 and 30ms-1 for the take-up velocities of 4 and 5km/min, respectively.