自固结子线起花凸轮设计基本方程的研讨

起花凸轮是花式捻线机中影响结子线结构的主要构件。而在凸轮设计中要考虑的因素比较多,诸因素互相影响,情况也比较复杂。同时,结子线又有多种:自固结子线与非自固结子线,单色结子线与多色结子线,以及与其他花式线复合的结子线等等。但就其实质说,结子线可归纳为自固结子线和非自固结子线两种。本文试图从自固结子线起花凸轮的设计着手,进行探讨,研究其内在规律性。     

花式线生产中饰纱控制技术的开发应用

(1 )问题的提出空心锭的应用使得传统的花式线生产工序合二为一 ,芯 ,饰、固纱同时并捻 ,一次成形生产花式线 ,明显地提高了工效。因此空心锭花式捻线机被广泛应用于超喂类 (圈圈线、波浪线等 )、花式线的生产 ,但该类设备用于生产控制类花式线特别是结子线时效果则不理想 ,究其原因主要是因为空心锭花式捻线机现有技术是通过控制芯纱运动规律来生产控制类花式线的 ,在生产结子线需要形成结子时 ,是控制芯纱使其暂停输出运动 ,正常输出的饰纱便会在芯纱上形成一个结子 ,问题在于空心锭是连续旋转的 ,其上的固纱有时也会在饰芯线上包缠出一个…     

空心锭花式捻线机生产结子线的新技术

探讨了在空心锭花式捻线机上生产结子类花式线的全新方法 ，即饰纱控制法。该方法是保持芯纱的运动速度恒定不变，让饰纱按要求改变运动速度，在需要形成结子时提高饰纱的喂入速度，以满足形成结子所需的用纱量。     

自固型结子花式线的成形机理

本文主要论述自固型结子花式线的结构和成形机理及工艺质量。     

结子线仿麻织物的开发

本文介绍了结子线仿麻产品的设计规格及风格特征等，并着重论述了其生产工艺技术。     

饰纱控制法--花式线生产花型控制新技术及其应用

探讨了在空心锭花式捻线机上生产花式线，特别是控制型结子类花式线的新方法，即饰纱控制法及其应用。该方法可保持芯纱的运动速度恒定不变，让饰纱按花型要求改变运动速度，在需要形成结子时采用一套机构合眼喂的饰纱捻台在花纱上的一定位置。     

利用夜光长丝开发系列花式纱线的研究

将夜光长丝作为饰纱原料,利用五罗拉花式捻线机纺制圈圈线、辫子线、结子线等夜光花式纱线,从原料准备、辅助装置设计及工艺参数的设定等方面介绍了纺制夜光花式纱线的技术关键,并探讨了相关工艺参数对花式纱线外观和结构的影响.     

结子懈线成因初论

分析了在八丁湿捻机上加工强捻丝时,结子懈线的形成原因、形态及预防方法。     

结子线仿麻织物的开发

阐述了结子线仿麻产品的规格，特征及主要生产技术，为长丝织造厂的产品开发提供参考。     

结子线的设计与生产工艺

结子线是由相同或不同颜色、大小、形状和间距的结子所构成的。结子线常用于装饰织物以及女线呢、薄型府绸、细纺和中长纤维织物中,可以起仿竹节、仿麻、仿绵绸、仿毛的效果。用结子线饰成格子,还可以突出格型,增加立体感。     

The role of geometry on the viscoelastic materials properties: tensile and stress relaxation of the yarn

The time-dependent mechanical behavior of textiles has particular importance. One of such behaviors is stress relaxation. When strain is applied constantly, there is a decreased stress with time in viscoelastic materials, which is called stress relaxation. The aim of this study is to investigate the effect of knot’s geometry (surgeon, square and eight) and the number of knots on the tensile and stress relaxation properties of the polyester yarn. Significant differences were observed for the tensile characteristics of the yarn in the presence of the knot. Generally, the knotted yarns demonstrated lower tensile stress and strain at failure. Moreover, the results revealed that the stress relaxation behavior of the yarn is affected by the number of knots and their geometry. The yarn without knot exhibited the highest stress relaxation percent while the yarn with the surgeon’s knot displayed the least stress relaxation percent. On the other hand, increasing the number of knots led to a decrease in the percentage of yarn stress relaxation.     

The Effect of Variation of the Isocyanate Content on the Refractometric Determination of the Concentration in Polyurethane Treatment Baths

A knot not previously used in the textile industry, the double-harness bend, is described and its performance in torque-unbalanced weaving yarn reported.

It is shown that the knot can be tied in three distinct ways, which behave differently under stress when tied in torque-unbalanced yarn. The performance of the knots is compared with that of the fisherman's knot, and it is shown that the best of the double-harness bends is likely to offer improved weaving.     

Influence of Twisting on Linen Fancy Yarn Structure

A study is reported for analysis of periodical effects of linen fancy yarns made in twisting process. The results indicate that the investigated variables are significant in determining the kind of decorative effect. It was concluded that the mathematical model that expresses the relationship between number of combination of two effects: loop/knot and plain knot in the unit of fancy yarn length and technological parameters of fancy yarn manufacture is informative. The received results enable to forecast the geometry of fancy yarn’s effects also permits to design new fancy yarns with optimum structure.     

空气捻接器纤维加捻机理的仿真与实验研究

纤维捻接是纺织络筒工序中的关键技术之一。为研究其捻接机理,需要结合仿真与实验技术,通过流体力学模型对空气捻接腔体内旋转气体的流动进行仿真计算,并分析纤维束的运动特征。对原纱、解捻纱和加捻纱的特征部位分别进行了结构观察,使用捻距L和直径d分别表征纱线的捻接效果和外观,结合仿真计算结果,对纱线捻接机理进行了分析。研究结论如下：（1）气流在加捻腔中发展成涡流,涡流促使纱线绕加捻腔轴中心旋转缠绕,形成节点。（2）捻距L值可以作为衡量纱线捻接效果的一个重要指标,其值越接近于原纱L值,纱线捻接效果越好;直径d值能够用于判断纱线捻接区域,若某部位直径d值大于原纱d值,则该部位是节点部位。     

改善段彩纱条干水平的工艺实践

段彩纱纱线条干水平普遍较差,增加了下游针织企业的织造难度,阻碍了段彩纱的普遍推广。本文分析段彩纱的工艺和性能特点,从前纺到细纱采取了一系列的工艺优化,提高了段彩纱的条干水平,条干变异系数值降低2%,大幅度降低了段彩纱的粗细节达到50%、棉结达40%,有效提高了段彩纱的纱线质量。     

4—THE FISHERMAN'S KNOT

An investigation of the fisherman's knot and its performance in torque-unbalanced weaving yarns is reported.

The term ‘fisherman's knot’ is shown to encompass three distinct knot structures. The physical characteristics of the structures are explored, and dramatic differences in their rates of slippage are shown to exist. Slippage is shown to occur predominantly via a change in knot structure rather than by yarn simply pulling through the structure.     

FA317A型并条机性能分析与改进实践

为了充分发挥FA317A型高速并条机的优良性能,稳定产品质量,对纺中、细号纱时出现的主要问题加以分析并研究对策,通过对上清洁器、断条自停装置的改进及部分工艺参数的调整,减少了胶辊粘缠、"轻条子"及"疙瘩纱",降低了重量不匀率,稳定了熟条质量,为后道工序的顺利进行做好了准备.     

超早熟短季棉纺制转杯纱初探

探讨超早熟短季棉纺制转杯纱的生产工艺。在相同的纺纱工艺条件下,纺制超早熟短季棉与细绒棉低捻转杯纱,对比了两种纱线的成纱质量指标。对超早熟短季棉生产过程中遇到的落白、成纱重量不匀、粗节、断头、接头质量问题进行了分析,提出了相应的解决方法。指出:纺制超早熟短季棉转杯纱,应加强梳理、多除杂质以保证成纱质量;所纺转杯纱条干均匀度和强力较低,而加捻效率较高。     

小比例色纺纱的生产体会

探讨了小比例色纺纱的生产技术要点。针对小比例色纺纱经常出现的色差、色结等质量问题,对原料选配、混色方法选择、工艺设计原则、生产管理等方面提出了控制措施和生产建议。在生产中,选用细度适中、成熟度好的原棉及色度稳定、回潮率适当的化纤,采用卷混法改善混色不匀,优化各道工序的工艺,做好清洁、隔离防护及质量检测工作,减少了产生色差的可能性,降低了色结,提高了小比例色纺纱的外观质量。     

精纺透视双层花呢的设计与生产

基于双层设计理念,分析了影响透视双层花呢透视效果的诸多因素,主要包括:织物结构、纱线结构、色彩配置,表里层紧度比、接结纱的接结方式和纱线排列比等,同时指出了生产该类产品应采取的质量控制措施,并用实例映证了诸因素对该类产品透视效果的影响。