分梳辊针布规格及其速度配置与转杯纱质量的关系

考察了分梳辊针布规格及其速度配置与转杯纱质量的关系,为工厂分梳辊针布的合理选择、转杯纱低捻工艺提供参考。     

周转轮系差速器双轴送经的余纱长度分析

在阔幅织机上,以周转轮系差速器作双轴送经的方法可以通过机构自动调节来缩小两织轴的经纱张力差异。但是,机构本身的结构及其故障都会引起两织轴的余纱长度不等。以两套电子送经机构分别控制丙只织轴的送经运动,是克服余纱长度不等的措施。     

气流纱的拉伸特性研究

本文讨论气流纱的拉伸特性。Hearle曾对具有理想结构纱线的拉伸特性进行过比较完整的研究工作。本文则根据气流纱独特的成纱结构,对Hearle理论在气流纱中的应用作了一定的修正,并在此基础上对气流纱的拉伸特性作了分析计算。计算结果与实测结果基本相符。最后还从气流纱的应力-应变关系式中,就影响气流纱强力、初始模量以及断裂功等等力学特性的一些主要工艺参数进行了分析讨论。得出合理选用阻捻盘、很好控制捻度传递长度;合理设计与选用分梳及输棉机构,在不断改善单纤维供应的同时,尽量减少纤维损伤,提高纤维有效长度;适当提高纺纱张力,增加纤维转移等等都是改善气流纱强力等力学特性、提高成纱质量的有效途径。对工业用气流纱,还可通过合理设计凝棉槽,以提高气流纱紧密度的途径来提高气流纱强力。     

运用高收缩涤纶长丝开发机织物新品种

高收缩涤纶纤维在国内已研制成功,在国外运用极广,用量很大。本文探讨由物理法制得的高收缩涤纶长丝在机织物中的应用。讨论了纱线结构、织物组织、高收缩纤维含量、收缩率与织物密度的关系等问题。提出了仿制绉纱类轻薄丝织物、凹凸织物和中厚型仿毛织物的方法。     

机织间隔织物柱纱高度的确定

机织间隔织物的厚度由柱纱的高度决定.为了确定影响柱纱高度的因素,从几何结构角度出发,定义了影响机织间隔织物柱纱形态的5个结构参数,并建立了结构参数间的几何关系.通过将柱纱高度计算值同实测值的比较,发现计算值与实测值吻合得较好,证明所建立的柱纱结构参数间几何关系能够很好地反映实际情况.     

纯毛精纺针织绒的工艺研究

简要介绍了全毛精纺针织绒生产工艺方面的探索和实践。主要讨论了全毛针织绒的生产流程,原料的选择、毛油合理的油水比例,纺纱设备的工艺调试对产品生产和成品质量的影响,以及在生产中采用的主要技术措施。     

Torsional Models of Two - ply Yarn

In this paper,the vector equation of a generaliseddoubly wound helix was derived.Treloar's pliedyarn geometry could be obtained as a special case ofthe generalised doubly wound helix.The shortest fi-bre length around the surface of a helical tube(formed by fibre helices)was determined by apply-ing variational principles.The fibre length as calcu-lated by using Treloar's geometry was compared in-directly with the shortest possible fibre length at dif-ferent levels of yarn deformation when some of Tre-loar's rigid geometrical constraints were relaxed.Anew idea based on non-concentric circles was intro-duced to approximate the fibre helix movement in atwo-ply yarn.A torsional model of two-ply yarnwas developed and the theoretical predictions werecompared with some preliminary experimental re-sults.     

驼绒/水溶性维纶包芯纱的包覆效果及性能

采用改进的环锭纺细纱小样机,试纺了9种不同规格参数的驼绒/水溶性维纶包芯纱,考察芯纱张力、芯纱含量和捻度等因素对包覆效果的影响,并测试包芯纱的拉伸性能、条干均匀度和毛羽指数等指标,获得了最佳纺纱工艺参数.研究结果表明:适中的芯纱张力可以提高包芯纱的包覆效果;芯纱含量越小,纱线包覆效果越好,断裂强力越高;捻度越大,包覆效果越好,毛羽指数越小,但断裂强力先增加后降低.优选工艺参数:芯纱含量为19.1%~19.9%;捻度为300~325捻/m;在芯纱不断裂的情况下,提高芯纱张力有利于改善包覆效果.     

Yarn Quality Prediction and Diagnosis Based on Rough Set and Knowledge-Based Artificial Neural Network

In the spinning process, some key process parameters（ i. e.,raw material index inputs） have very strong relationship with the quality of finished products. The abnormal changes of these process parameters could result in various categories of faulty products. In this paper, a hybrid learning-based model was developed for on-line intelligent monitoring and diagnosis of the spinning process. In the proposed model, a knowledge-based artificial neural network（ KBANN） was developed for monitoring the spinning process and recognizing faulty quality categories of yarn. In addition,a rough set（ RS）-based rule extraction approach named RSRule was developed to discover the causal relationship between textile parameters and yarn quality. These extracted rules were applied in diagnosis of the spinning process, provided guidelines on improving yarn quality,and were used to construct KBANN. Experiments show that the proposed model significantly improve the learning efficiency, and its prediction precision is improved by about 5. 4% compared with the BP neural network model.     

环锭纺纱线气圈的研究

用圆柱坐标系建立纱线微段的微分方程,用数值方法求解可获得气圈形态及其纱线受力的精确解。用解析方法建立气圈形态及其纱线受力的近似解析表达式,可反映气圈各参数对形态或受力的影响,其分析过程清晰、简捷的特点显著。两种计算结果的相对误差甚微。