纺织学报 ›› 2019, Vol. 40 ›› Issue (05): 136-143.doi: 10.13475/j.fzxb.20180605208

• 机械与器材 • 上一篇    下一篇

喷气涡流纺金属丝包芯纱成纱过程的在线观测与分析

何建, 裴泽光(), 周健, 熊祥章, 吕海辰   

  1. 东华大学 机械工程学院, 上海 201620
  • 收稿日期:2018-06-15 修回日期:2018-12-21 出版日期:2019-05-15 发布日期:2019-05-21
  • 通讯作者: 裴泽光
  • 作者简介:何建(1992—),男,硕士生。主要研究方向为纺纱在线监测技术。
  • 基金资助:
    国家自然科学基金项目(11302048);上海市浦江人才计划项目(16PJ1400400);上海市自然科学基金探索类项目(18ZR1402200);东华大学励志计划项目(18D210302)

Online monitoring of formation process of vortex core-spun yarn containing metal wire

HE Jian, PEI Zeguang(), ZHOU Jian, XIONG Xiangzhang, LÜ Haichen   

  1. College of Mechanical Engineering, Donghua University, Shanghai 201620, China
  • Received:2018-06-15 Revised:2018-12-21 Online:2019-05-15 Published:2019-05-21
  • Contact: PEI Zeguang

摘要:

为研究喷气涡流纺金属丝包芯纱成纱过程中纤维运动状态与包缠效果,设计了基于工业内窥镜的在线观测装置,实现了对金属丝与短纤维在喷嘴内腔中运动图像的捕捉;提取纤维包缠过程中的露芯特征,与制成包芯纱的露芯量进行对比分析,并研究了喷嘴气压与纺纱速度对纱线露芯量的影响。研究表明:短纤维包缠金属丝的运动状态主要分为3类,短纤维以一定的螺旋角均匀包覆金属丝,短纤维头端包缠金属丝而尾端倒伏于锭子上或呈螺旋状松散分布在金属丝周围,短纤维尾端包缠金属丝而头端呈自由离散状态;纱线露芯量随喷嘴气压的提高先降低后增加,随纺纱速度的提高先增加后降低;在线观测结果与成纱的露芯量随工艺参数变化的趋势较为一致。

关键词: 喷气涡流纺, 包芯纱, 金属丝, 在线观测, 工业内窥镜

Abstract:

In order to investigate the dynamics and wrapping quality of the fibers in the formation process of the vortex core-spun yarn containing metal wire, a device for the online monitoring based on an industrial endoscope was designed and images of the metal wire and the staple fibers moving in the spinning nozzle was captured. The characteristics of the exposed metal wire core during the wrapping process of the fibers were extracted. Comparative analysis of the amounts of exposed metal wire core in the wrapping process and in the yarn was performed. Influences of nozzle pressure and yarn delivery speed on the amounts of exposed metal wire core were also studied. The results show that the motional characteristics of staple fibers in the wrapping process can be grouped into three main categories: fibers evenly covering the metal wire with a certain helix angle; trailing ends of the fibers being expanded on the spindle or loosely distributed around the metal wire in spiral configurations with their leading ends having wrapped around the metal wire; and leading ends of the fibers being in a free and separated state with their trailing ends having wrapped around the metal wire. The amount of the exposed metal wire core decreases first and then increases with the increase of the nozzle pressure, while it increases first and then decreases with the increase of the yarn delivery speed. The variation trend of the amount of exposed metal wire core with the process parameters is in accordance with the online monitored results.

Key words: vortex spinning, core-spun yarn, metal wire, online monitoring, industrial endoscope

中图分类号: 

  • TS103.2

图1

喷气涡流纺金属丝包芯纱成纱过程的在线观测方法与装置示意图 1—点光源控制器;2—CCD相机;3—内窥镜;4—点光源;5—喷嘴;6—计算机;7—金属丝;8—粗纱;9—包芯纱。"

图2

喷嘴结构与观测装置示意图 1—金属丝;2—纤维束;3—喷气涡流纺包芯纱;4—纤维导引体;5—涡流管;6—锭子;7—光源;8—光源控制器;9—内窥镜;10—光学接口;11—CCD相机;12—数据传输线;13—计算机。"

表1

纺纱实验参数"

工况类型 喷嘴气压/MPa 纺纱速度/(m·min-1) 牵伸比
工况1 0.50 100 40
工况2 0.55 100 40
工况3 0.60 100 40
工况4 0.55 130 40
工况5 0.55 160 40

图3

成纱过程中纤维对金属丝的包缠图像"

图4

纤维包缠金属丝过程图像"

图5

露芯特征提取过程图像"

图6

纱线显微镜照片"

表2

露芯点数量和露芯长度百分比随气压的变化"

喷嘴气压/
MPa
露芯点数量/(个·m-1) 露芯段长度百分比/%
成纱在
线观测
纱线显
微照片
成纱在
线观测
纱线显
微照片
0.50 87 62 24.87 11.27
0.55 79 60 24.55 10.68
0.60 94 66 27.60 13.67

表3

露芯点数量和露芯长度百分比随纺纱速度的变化"

纺纱速度/
(m·min-1)
露芯点数量/(个·m-1) 露芯段长度百分比/%
成纱在
线观测
纱线显
微照片
成纱在
线观测
纱线显
微照片
100 79 60 24.55 10.70
130 85 62 25.70 11.30
160 88 58 22.90 9.62

图7

成纱在线观测图像与纱线显微图像中的露芯特征变化"

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