基于赛络新型花式纱的纺制及性能分析

花式纱线因其特殊的外观结构和丰富的色彩变化,已成为国内外研究的热点。为丰富花式纱线品种,文章基于赛络纺纱方法,采用表面刻有凹槽的后罗拉上胶辊纺制新型赛络花式纱线,并阐述新型赛络花式纱的纺纱机理。在保证纺纱工艺参数及原料相同的情况下,通过TH 598 J环锭细纱机上进行试验,分别纺制赛络新型花式纱和普通赛络纱,观察纱线的纵向结构,并对其线密度、强伸性能、条干、毛羽指标进行测试和对比分析。试验结果表明:纱线的纵向外观呈现花色变化;与普通赛络纱相比,新型赛络花式纱的断裂强度、断裂伸长率、条干均匀度和毛羽相差不大。     

细纱三罗拉四胶圈牵伸工艺试验分析

测试分析了三罗拉四胶圈牵伸装置后区牵伸倍数、总牵伸倍数和后区罗拉握持距与成纱质量的关系，并进行了显著性检验。三罗拉四胶圈牵伸装置对后牵伸区内须条的运动控制增强，可以提高细纱机的后区牵伸能力，增大总牵伸倍数，有利于细号纱纺纱质量的提高。     

后区牵伸倍数对细纱前区压力棒牵伸的影响

探讨后区牵伸倍数对细纱前区压力棒牵伸成纱质量的影响.观测、分析了细纱机前区压力棒牵伸须条的形态及摩擦力界的变化;测试分析了细纱机后区牵伸倍数对成纱质量的影响.结果表明:细纱机前区加装压力棒对减少成纱的千米粗节、千米细节及千米棉结具有显著效果,但会使成纱毛羽指数恶化;适当减小后区牵伸倍数,有利于改善成纱质量.根据对成纱各项指标的综合评价结果,后区牵伸倍数在1.2以下为宜.     

国产细纱机新型牵伸元件及工艺配置与成纱质量的关系

通过生产试验,分析了细纱机牵伸系统采用国产新型V型牵伸、气动加压、低硬度高弹性胶辊、新型上销、下销、中胶辊等纺纱器材和合理工艺配置对成纱质量的影响,并重点对Ⅴ型牵伸后区倍数、罗拉隔距、气动摇架压力大小和前胶辊的前冲量进行研究,探讨了提高成纱质量的有效途径.     

提高CJ11.7tex纱条干均匀度的工艺配置

在生产CJ11.7tex纱的基础上分析了纱线条干均匀度的影响因素。为了提高细纱条干均匀度,对影响成纱条干均匀度的前区工艺参数、后区牵伸工艺进行了工艺配置。实验结果证明,采用较小的粗纱定量、细纱捻系数、前中罗拉隔距、较小的钳口隔距、较小的后区牵伸倍数,以及较大的前胶辊压力,采用较大前胶辊直径,适当增加粗纱捻系数等措施,可以提高成纱条干CV值。     

细纱气动V形牵伸纺制CJ 3.6 tex纱的工艺配置

为了在气动V形牵伸细纱机上顺利生产CJ 3.6 tex纱,保证成纱质量,对粗纱定量、后区牵伸倍数、罗拉隔距、胶辊加压及前胶辊前冲量等工艺参数进行了优化试验.结果表明,采用较大的粗纱定量,通过合理配置细纱牵伸工艺,采用紧隔距、适当加压、增大前胶辊前冲量及配用软弹胶辊,可使CJ 3.6 tex纱条干CV控制在18.2%以下.     

细纱机牵伸分配对纱线性能影响研究

研究细纱机在不同牵伸分配下对纱线性能的影响。实验测试了不同细纱机牵伸分配所纺纱线的条干、强力变化,分析了细纱机后区牵伸倍数对成纱质量的影响。     

细纱机后区压力棒牵伸的效果及牵伸倍数的优化

为提高成纱质量,在细纱机的后牵伸区加装压力棒后细纱机的后区牵伸倍数需要改变。当后区牵伸倍数过小时,粗纱在后区不能有效牵伸,使成纱的粗节增多。如果后区牵伸过大,会引起牵伸波而使成纱质量恶化。测试、分析了细纱机后区加装压力棒后纺纱效果及后区牵伸倍数对成纱条干CV值、粗细节及棉结等质量指标的影响。结果表明,纺制捻系数为109、定量为0.545g/m粗纱的最佳纺纱条件是后区牵伸倍数为1.35、中后罗拉的握持距为51 mm。     

基于大直径软胶辊的细纱牵伸机制及其应用效果

为提高成纱质量和降低能耗,采用大直径软胶辊的细纱牵伸元件配置,并对其牵伸机制与应用效果进行分析。改变牵伸区胶辊的尺寸和用材,并配置合理的工艺参数,通过加大罗拉隔距、中上罗拉使用低硬度丁腈橡胶胶辊代替MR碳纤辊并增大胶辊直径,可减轻摇架压力,在提高成纱质量的基础上达到节能的目的。采用改进后的细纱机生产不同线密度的纱线,研究随着细纱牵伸倍数的增加,轻加压条件下采用大直径软胶辊牵伸对成纱质量的影响。试验结果表明:细纱牵伸区采用大直径软胶辊配置对重定量的粗纱,大牵伸与超大牵伸细纱、赛络纺纱线等品种,更能体现其优势,成纱的细节明显减少,同时也可解决细纱特殊机械波问题。     

细纱机V型牵伸牵伸区工艺探讨

分析细纱机V型牵伸的结构特点和作用，通过试验不同后区牵伸倍数、粗纱捻系数、前上罗拉和中上罗拉的位置、使用后区压力棒等工艺参数对成纱质量的影响。可以达到掌握V型牵伸装置的性能，提高成纱质量的目的。     

不同引纱方法对云纹纱成纱外观及质量的影响

为改善云纹纱外观及提高其成纱质量,探究了3种不同引纱方法对云纹纱成纱外观及质量的影响。在牵伸细纱机上分别纺制29.2、14.6、9.7、7.3 和5.8 tex的云纹纱,对每种线密度的云纹纱,保证其他工艺参数一致,通过改变饰纱的喂入方式纺制而得,即饰纱分别从细纱机后罗拉、中后罗拉、中前罗拉喂入。通过观察成纱外观,并对其强伸性能、条干、毛羽指标进行测试和对比分析。结果表明：不同的引纱方法会产生不同的成纱外观,较其他2种方式,饰纱从中后罗拉喂入时,所纺成的云纹纱成纱3 mm内有益毛羽较多,3 mm以上有害毛羽较少,强力及成纱品质指数均高于其他2 种方式,成纱质量较优,且成纱包缠结构较为紧密,立体感更强。     

Research on fiber distribution in front draft zone of super high draft ring spinning based on cut-middles method

A super draft ring spinning machine was designed to spin high-count cotton yarns. It was equipped with four-line draft system (FLDS) and four aprons. For yarns spun on FLDS, it often occurs that yarn unevenness increased compared with three-line draft system (TLDS). In the paper, by cut-middles method, the fiber distribution in front draft zone of FLDS draft system was studied, and corresponding yarn qualities were analyzed. First, comparison analysis of yarn quality between FLDS and TLDS was presented. Cotton yarns of 9.7 and 7.3 tex were spun by TLDS and FLDS ring spinning machine, respectively. The results shows that for 9.7 tex cotton yarn, slower fibers in yarns spun on FLDS are more than that in yarns spun on TLDS. For FLDS, the friction field at the back of front draft zone is stronger, which improves yarn evenness. However, for 7.3 tex cotton yarn, accelerated point of fibers on FLDS is nearer to nipper bite of front roller than that on TLDS. Thus, evenness of yarns spun on FLDS is better. Then, 4.9 tex cotton yarn was taken as an example, and they were spun by four kinds of draft distributions on FLDS. The results indicate that for 4.9 tex cotton yarns spun by 64.1 × 1.60 × 1.15, slower fibers at the back of front draft zone are mostly found. And accelerated point of fibers is nearest to nipper bite of front roller. Therefore, 4.9 tex cotton yarns spun by 64.1 × 1.60 × 1.15 have best yarn evenness.     

后区牵伸对等线密度棉段彩纱性能的影响

段彩纱是一种在纱线纵向色彩呈分段变化的花式纱线,现有的生产工艺不可避免产生竹节纱的效果,导致不能大规模地推广。本文首次采用改进细纱机的牵伸机构,制备线密度恒定,而组份、色彩是分段变化的棉段彩纱。并探讨分段时间、某一分段时间内两组份的质量比例对成纱性能的影响。结果表明通过合理控制后区牵伸工艺,可以生产线密度恒定且性能良好的段彩纱。并提供了牵伸机构的改进方案,为实际生产提供参考。     

Effects of directed movement of fibres in a twist triangle on yarn quality

This work investigates the effect of directed flow of the fibres in a twist triangle on yarn properties. This is done using different clip‐on attachments positioned on the front rollers of a ring spinning frame. Seven sets of rollers (plain non‐grooved; 75°‐biased left‐to‐right grooved; 75°‐biased right‐to‐left grooved; 15°‐, 45°‐ and 75°‐biased grooved from both sides towards the centre and solo) are made and positioned immediately below and parallel to the top front draft rollers of the laboratory ring spinning frame (tester model 82 KA) so that they can interact with the emerging drafted fibre strand before twist insertion. Afterwards, a 0.495‐ktex (2.02 Nm) finisher worsted roving composed of 55% polyester and 45% wool is fed into each unit of the ring spinning frame to produce a yarn with a yarn count of 30 Nm and a twist factor of 125. The rollers affect the flow of the fibres in the triangle zone and, as a result, the quality of the yarns is affected. A comparison of the yarns produced shows that directing the fibres in the triangle zone could improve the yarn quality. The results indicate that the 75°‐biased grooved (from both sides towards the centre) rollers improve the yarn quality in terms of hairiness, elongation and imperfections.     

环锭细纱机VC型牵伸工艺优化的实践

介绍了环锭细纱机VC型牵伸装置的基本特点及各部对成纱质量的影响,分析了其牵伸机理,测试了后区压力棒、前区隔距、低硬度高弹性大直径胶辊、钳口隔距、罗拉隔距、前后胶辊直径小档差等对成纱质量的影响。指出:VC型牵伸型式在合理的前区隔距、低硬度高弹性大直径胶辊、适度钳口隔距、大后区罗拉隔距、前后胶辊直径小档差搭配时,成纱条干CV值、千米粗细节及棉结等随后区牵伸倍数增大而减小;胶辊前冲4 mm,合理张力架尺寸、大后区隔距、大粗纱捻系数配合适度后牵伸倍数,稳定平衡了牵伸力和握持力,能保证VC型牵伸装置质量稳定。     

FA502型细纱机减少成纱毛羽的工艺措施

主要研究了FA502型细纱机纺纱时，后区牵伸倍数、细纱捻系数和皮辊硬度对成纱毛羽的影响。     

Aii analysis of the spinning and performance of new fancy yarn based on Siro spinnin北大核心CSCD

The fancy yarn has become a research hotspot al home and abroad because of its special appearance and rich color changes.In order to enrich the variety of fancy yarns, based on Siro spinning, this paper used rubber-covered back roller with grooves on its surface to spin new Siro fancy yarns and explained the spinning mechanism of new Siro fancy yarns.With the spinning parameters and materials being the same, a test was carried out on a TH 598 J ring throstle, and new Siro fancy yams and ordinary Siro yams were spun separately.The longitudinal structure of the yarns were observed and analyzed, and their linear density, tensile property, evenness and hairiness index were tested and compared.The test results showed that the longitudinal appearance of the yams showed floral changes.There was little difference between ordinary Siro yarns and the new Siro fancy yarns in breaking strength, elongation at break, evenness and hairiness. © 2021 China Silk Association. All rights reserved.     

细纱牵伸摩擦力界分析及工艺配置试验

探讨细纱罗拉加压与钳口隔距的工艺配置要求及牵伸区摩擦力界的合理性.通过分析中部摩擦力界对后区纤维与前区纤维运动的控制特点,并在CJ 14.5 tex和C 19.5 tex品种上对不同罗拉加压、钳口隔距配置下胶圈运转稳定性及成纱质量进行试验.结果表明:中罗拉和上下胶圈、销子所构成的中部握持钳口对牵伸效果起着关键作用,该区域摩擦力界的配置对前区牵伸效果产生直接影响,对后区牵伸也产生影响,同时影响胶圈运行状态.中罗拉适当增加压力,配合较小的弹性钳口隔距,使牵伸系统中部配置较强的摩擦力界,并使前后档罗拉加压与之协调,可在牵伸系统中获得较好的摩擦力界配置,对纤维的控制加强,有利于提高成纱质量.