纺纱三角区形态变化对环锭纱线质量的影响

为探讨纺纱三角区形态变化对纱线性能的影响机制,以斜位纺纱原理为背景,建立了斜位纺纱加捻三角区变化模型。通过在不同细纱机型上分别进行直位和斜位的纺纱实验,实现斜位纺加捻三角区形态变化差异。对比分析了不同纺纱三角区形态下纱线的性能,对理论分析结果进行实验证明。结果表明:捻度有效传递和对应斜位导纱方式能有效降低加捻三角区几何面积,提高了三角区纤维握持加捻效果,减少了成纱毛羽,实验结果与理论分析相符合。     

高速涡流对环锭纺成纱质量的影响

探讨高速涡流对环锭纺成纱质量的影响.在环锭细纱机的前钳口至导纱钩之间安装自制的高速涡流装置.分别采用5种气压纺三种不同线密度的纱,并与传统环锭纱进行质量对比测试分析.结果表明:在涡流方向与纺纱Z捻捻向相同的条件下,与传统环锭纱相比,成纱3 mm及以上毛羽可减少70.3％～82.7％,纱线强力可增加7.3％～8.0％,成纱条干随气压增高有所恶化.指出:高速涡流装置可以缩小环锭纺加捻三角区的高度和宽度,从而达到改善成纱毛羽、增加纱线强力的作用,其重点是根据纱线密度优选气压.     

陶瓷导纱钩纺纱性能研究

文章简单介绍了陶瓷导纱钩,为探索陶瓷导纱钩的纺纱性能,分别采用普通金属导纱钩、陶瓷导纱钩、镀层导纱钩进行纺纱试验,对比三种纱线毛羽和条干情况,发现陶瓷导纱钩对纱线毛羽和条干有明显的改善。     

机械预捻环锭纺技术及其成纱性能分析

为提高环锭纺成纱质量,提出一种机械预捻环锭纺纱方法,并对其原理及预捻装置的方案设计进行介绍.通过纺纱试验探究了捻度对成纱强力和纱线毛羽性能的影响,并利用显微镜观察了预捻环锭纱的表面形态,同时测量了预捻环锭纺纱过程中的加捻三角区宽度,证明了预捻环锭纺的有效性.试验结果表明:机械预捻环锭纺在提高成纱强度、减少纱线毛羽方面效...     

错位纺纱对成纱性能的影响

采用错位纺纱技术在DSSP-01型数字式小样细纱机上纺制不同细度不同捻向的纯棉纱,通过纱线性能测试探讨错位方向对不同粗细和不同捻向纱线成纱性能的影响.实验结果表明,错位纺纱对成纱断裂强度和成纱条干有不同程度的改善,但是错位纱的断裂伸长率降低;由于吸棉笛管和导纱钩的不匹配,错位环锭纱毛羽显著增加.     

应用给湿装置改善环锭纺成纱毛羽

为减少成纱毛羽,在环锭纺细纱机前钳口与导纱钩之间加装接触式给湿装置,对出三角区后的低捻段纤维须条给湿。借助高速摄影拍摄纱线与导纱轮接触所产生的水雾三角区长度发现,导纱轮直径越大,水雾三角区长度越长。通过测试一落纱平均耗水量,纱线细度相同条件下,随导纱轮直径增大,耗水量增多;同时,纱线细度增大也会增加纺纱耗水量。在上述条件下进行纺纱试验并测试成纱毛羽,14.6 tex 精梳棉管纱3 mm 及以上有害毛羽较普通环锭纺降低了35.9%,19.5 tex精梳棉纱有害毛羽降低了41.1%。14.6 tex 精梳棉管纱络筒后3 mm 及以上有害毛羽较普通环锭纺筒纱降低了41.6%。结果表明,对环锭纺须条给湿可大幅度减少成纱有害毛羽,从而提高纱线品质。     

实用新型专利:导纱钩

发明所述导纱钩包括导纱杆及与导纱杆相连的调节杆。其特征在于导纱杆中部设有卷绕成环状的过纱通道。该实用新型采用NiCr材料制造,有效地提高了导纱钩的抗磨损和抗划伤性能,延长了导纱钩的使用寿命,同时也保证了导纱通道长时期的光洁平滑,使纺纱张力稳定,断头率降低,有利于提高成纱质量和生产效率;钩体中间卷绕成环状的过纱通道可使纱线从中穿过时,毛羽卷绕并聚集在纱线上,有效地减少了毛羽。     

实用新型专利：导纱钩

发明所述导纱钩包括导纱杆及与导纱杆相连的调节杆。其特征在于导纱杆中部设有卷绕成环状的过纱通道。该实用新型采用NiCr材料制造,有效地提高了导纱钩的抗磨损和抗划伤性能,延长了导纱钩的使用寿命,同时也保证了导纱通道长时期的光洁平滑,使纺纱张力稳定,断头率降低,有利于提高成纱质量和生产效率;钩体中间卷绕成环状的过纱通道可使纱线从中穿过时,毛羽卷绕并聚集在纱线上,有效地减少了毛羽。     

紧密纺纱成纱机理及特点分析

介绍了紧密纺纱的成纱机理及特点。紧密纺纱可消除传统环锭纺纱的加捻三角区 ,从而减少纱线的毛羽、提高纱线强力和弹性、减少纺纱断头 ,便于后道工序加工。紧密纺纱将成为本世纪纺纱发展的方向。     

纺纱过程对成纱毛羽影响之研究(二)

分析了毛羽形成的机理,并把成纱毛羽分为加捻毛羽和过程毛羽,进一步分析认为加捻毛羽受加捻三角区大小影响;过程毛羽除受钢领、钢丝圈、导纱钩、隔纱板、导纱杆、张力盘、槽筒等纺纱器材影响外,还与回潮率、各种工艺速度、工艺条件有关.详细介绍了前、后纺各种纺纱器材的优选和工艺参数的优化,以及其他控制成纱毛羽的措施.     

Dynamic analysis of spinning triangle geometry part 2: spinning triangle geometry and yarn quality

This paper examines empirical relationships between the geometrical parameters of the spinning triangle and the quality parameters of ring spun yarns. For this purpose, controlled variations in the geometry of the spinning triangle were induced using two existing modifications in the ring spinning process and by varying the yarn twist level. The geometrical parameters of the spinning triangle were measured using the clear rubber roller combined with digital image processing techniques as described in the first part of this study. The yarn quality parameters measured included yarn hairiness, strength, elongation and evenness. Yarn hairiness showed more noticeable sensitivity towards the physical shape of the spinning triangle than yarn tenacity, while yarn evenness and elongation were not significantly influenced by changes in spinning triangle geometry.     

紧密纺与普通环锭纺纱线性能的对比研究

通过实验，比较了紧密纺纱线与普通环锭纺纱线的性能。紧密纺纱线能在采用较低捻度的条件下显著减少3mm以上的毛羽数，一些柔软度要求较高的产品则不宜采用紧密纺的纱线。     

凹槽形状对气流槽聚纺纱集聚区流场及成纱性能的影响

针对气流槽聚纺纱不同集聚凹槽形状对成纱性能的影响,建立集聚区域三维模型,利用Fluent软件模拟不同凹槽结构的气流槽聚装置集聚区域的流场分布,比较其气流流场的特点。模拟结果表明：在相同负压条件下,非对称凹槽气流槽聚装置的气流利用率高,负压气流方向和集聚方向的速度分别为48.3、24.5 m/s,可有效握持和集聚纤维束,使得输出的须条能够最大程度地集聚,纤维也尽可能多地集中成为主体纤维束,有利于减少毛羽。通过测试所纺27.78 tex苎麻纱的成纱性能,验证非对称凹槽的集聚性能以及集聚气流对成纱性的影响。实验结果表明：采用非对称凹槽集聚装置纺制的纱线毛羽比环锭纺减少了77.58%,成纱强力比环锭纺提高了14.32%,成纱性能显著提高。     

Research on pneumatic compact spun yarn quality

Compact spinning is one of the most important improvements of traditional ring spinning, which is implemented by adding a fiber condensing device to condense the fiber bundle and decrease the spinning triangle. Pneumatic compact spinning is the most widely used compact spinning method at present. Compact spinning with perforated drum and compact spinning with lattice apron are the two main kinds of pneumatic compact spinning. Therefore, in this paper, comparison analysis of yarn quality between compact spinning with perforated drum and compact spinning with lattice apron is presented. First, 9.7 tex cotton-combed yarn is spun in three different kinds of pneumatic compact spinning systems, including two kinds of compact spinning with perforated drum: Rieter’s COM4 and complete condensing spinning system (CCSS), and one lattice apron compact spinning system: Toyota’s four-line compact spinning. The test results of yarn qualities show that comparing with other two kinds of compact spinning systems, the yarn spun in CCSS has the best evenness, least long hairiness, and slightly lower strength. Then, the properties of spun yarns are analyzed using two methods. First, using Fluent Software, numerical simulations of three-dimensional flow field in condensing zone of three kinds of compact spinning system are presented, respectively. Second, the fiber movements in condensing zones are captured using high speed camera system OLYMPUS i-speed3.     

细纱机四皮圈牵伸装置对成纱毛羽的影响

对采用四皮圈牵伸装置和采用普通细纱牵伸装置纺制纱线的毛羽进行了实验对比，分析表明四皮圈牵伸装置由于加强了对后区纱条运动的控制，可以显著减少成纱毛羽，尤其是3mm以上的长毛羽。     

浅谈细纱机纱线毛羽的成因及控制措施

为了减少纱线的毛羽,提高纱线的质量,简要分析在原料、设备器件、车间温湿度及人为因素等方面分析了传统环锭纺细纱机及网格圈式紧密纺细纱机上成纱毛羽形成的主要原因,并进行了相应的实验。提出了控制细纱毛羽的主要措施,即采用成熟度适中及短绒率低的原棉,注意钢领与钢丝圈的的选配及使用周期,调节好车间温湿度并加强车间管理。结果表明,采用以上措施有利于减少毛羽。     

喷气涡流纺成纱工艺对竹浆纤维色纺纱性能的影响

为进一步拓展喷气涡流纺织品种及提高传统色纺纱加工效率,利用Box-Behnken设计实验方案,借助软件Minitab 16,分析喷气涡流纺工艺参数对竹浆纤维色纺纱性能的影响。结果表明：成纱工艺对色纺纱断裂强度的影响较为复杂,其中纺纱速度及纱线线密度对色纺纱断裂强度的影响受喷嘴气压不同取值影响;色纺纱条干不匀主要受纺纱速度和纱线密度影响,提高纺纱速度使纱线条干不匀先减后增,而减小纱线线密度将显著恶化色纺纱条干;色纺纱毛羽主要受喷嘴气压和纺纱速度影响,降低喷嘴气压及提高纺纱速度均会使纱线毛羽增加;色纺纱直径主要受喷嘴气压和纺纱线密度影响,增加喷嘴气压或减小纱线线密度,均会使色纺纱直径明显减小。     

嵌入式复合纱与环锭纱的性能对比分析

为了了解毛涤嵌入式复合纱的结构和性能特点及其与环锭纱的差异,在传统环锭细纱机上加装2个长丝喂入装置和2个粗纱喂入装置纺制毛涤嵌入式复合纱,在传统环锭细纱机上纺制环锭纱;在捻系数相同的条件下,纺制了29 tex的毛涤嵌入式复合纱和环锭纱,对两种成纱的力学性能、条干和毛羽进行了测试和对比分析.结果表明:毛涤嵌入式复合纱相比环锭纱,断裂强度、断裂伸长率高,条干CV值低,表面光洁,毛羽少.     

The Influence of the Spinning Process,Yarn Linear Density,and Fibre Properties on the Hairiness of Ring-spun and Rotor- spun Cotton Yarns

Cotton–spun yarns from 34 staple stocks were manufactured by means of the ring–spinning process (34 yarns) and a rotor–spinning process (29 yarns) and tested for hairiness with the Shirley Hairiness Meter. For each spinning system, yarns were spun at two values of yarn linear density (15 and 30 tex for ring–spinning and 30 and 50 tex for rotor–spinning), but the twist multiplier was kept constant within the series for each spinning process.

The higher hairiness of ring–spun yarns and an increase ln hairiness with the yarn linear density were confirmed. The effect of the fibre parameters on yarn hairiness explains only about 30% of the total effect for ring–spun yarns and 40% for rotor–spun yarns. Fibre length and its uniformity are the fibre properties having the greatest influence on the hairiness of both ring– and rotor–spun yarns, the Micronaire index having only slight influence on the hairiness of ring–spun yarn.