基于ANSYS Workbench多剑杆织机钢筘的有限元分析及优化

为了提高多剑杆织机的织造效率,减少织造过程中纱线间、纱线与筘齿间的摩擦,进而改善立体织物的整体性能,根据钢筘的结构特点,通过建立钢筘三维有限元分析模型,提出对异形横截面立体织物打纬时钢筘的应力分析方法,并应用ANSYS Workbench软件求出织制不同横截面立体织物时钢筘的应力及其固有特性,并对结果进行了分析,为多剑杆织机钢筘的设计和选型提供了参考。     

“田”字型织物织出圆整外形的巧妙设计

为了用"田"字型立体织物做增强体复合成内有四孔、外呈圆形的四孔管道,按弧长和半径的比例严格掌握长度比例,通过不同织区穿经循环不同的巧妙设计,使"田"字型织物形成圆整外形。     

不同层数和穿筘方式的正交织物复合材料隔声性能研究

以玻璃纤维为原料,在SGA598半自动小样机上织造正交织物,使用真空辅助成型法制作正交织物复合材料,探讨不同层数、不同穿筘方式的正交织物复合材料的隔声性能,结果发现:层数越多的正交织物复合材料,纤维体积分数增大,其隔声性能越好;层数相同时,4/2穿筘方式的正交织物复合材料的隔声性能要优于2/2穿筘方式的正交织物复合材料。     

浅谈竹节布产品的设计

组织结构、穿综、穿筘方法的设计是竹节布织物上机设计的重要内容,合理地组织结构及穿综、穿筘设计,是使竹节布织物的内在质量和外观风格得以保证,品种生产得以顺利进行的重要因素。     

不同组织织物的穿筘方法浅析

探讨不同组织的织物在织造过程中较适宜的穿筘方法.对透孔组织织物,将浮沉规律相反的相邻两根经纱分别穿入不同的筘齿,以得到更明显的透孔效果.对经纱之间有滑移现象的组织织物,为避免在布面形成类似筘路的疵点,可将有滑移现象的经纱分别穿入不同的筘齿;而对于要形成特殊布面风格的织物,则要极力促成经纱的滑移,将有滑移现象的经纱穿入同一筘齿.对于有双经和三经的织物组织,可将浮沉规律相同的经纱分别穿入不同的筘齿.采取以上穿筘方法,不但能保证布面质量符合要求,而且能保证织造的顺利进行.     

马裤呢织物的横档清除方法浅析

本文应用穿筘结构图简要分析了织造马裤呢织物时横档产生的原因及消除方法，以供纺织同行参考。     

Production of Two-layer Fabric with Different Warp and Multiple Weft

探讨异经多纬双层织物的设计与生产技术要点.针对织物经纬纱差异、生产难度比传统织物大的特点,整经工序要控制好两种经纱的张力;浆纱时对其中的竹节纱进行上色,确保穿筘工序按工艺排列正确穿筘;织造工序合理调节主喷嘴引纬气压,适当增加上机张力,合理调试上机工艺,防止反面纬纱游移、纬缩等疵点造成染整后布面风格与质量变差.通过对工艺进行调整后,织机效率达到87％以上,产品入库一等品率达99.8％以上,满足了设计及生产要求.     

关于缎类织物工艺参数修正的探讨

素绉缎类织物是具有光滑、缜密、平挺之感的传统缎类产品,具有很好的市场基础。习惯上,设计者通常在确定缎类织物上机工艺时,为方便上机及操作。往往采用1根/综,5综/齿的穿综方式,以便于生产。但这样有一个严重的缺陷,由于缎类织物大部分采用五枚缎组织。因此织物形成后,绸面有明显的筘痕,影响织物的外观效果。从理论上分析,要解决此病症可通过改变筘齿穿入数的方法解决。即采用1根/综、3综/齿,或1根/综、4综/齿。但考虑到真丝织物的筘号最大限度是12.6齿/英寸,要求同等幅宽的织物如果采用     

弧型织物的生产原理

介绍了弧型织物的特点、生产原理和生产过程中需要的条件.经向弧型织物是用特制的V型钢筘在生产时上下移动形成的,纬向弧型织物是依赖钢筘的每个筘齿片形状不同,逐渐过渡,打纬时筘齿与纬纱的接触点形成曲线而织成.弧型织物与其他织物联合时,要根据所联合的织物来制定工艺,有时需要使用2个或2个以上的织轴.布面上弯曲明显的经纱在整经时应减少张力垫圈的质量,还要提高浆纱的质量.     

Y形管状立体织物的设计与试织

研究了Y形管状立体织物的设计及试织方法.分析了Y形管状立体织物的几何结构特点,从织物组织、总经根数、横截面图以及上机图四个方面介绍了Y形管状立体织物的设计要点,并在剑杆织机上成功织造了织物试样.指出:Y形管状立体织物可以采用将三维立体织物转变为二维平面织物模型的方法进行设计,并可采用分段织造技术进行织造.认为:Y形管状立体织物的设计与织造方法能够满足实际要求,是合理和可行的.     

带织物层叠缠绕玻璃钢管的设计与缠绕成型

采用仿形织造方法织造带织物,并用该带织物层叠缠绕生产玻璃钢管道是一种新方法。在缠绕成型过程中,为了使管道的成型性良好,需要对缠绕角度、经纱长度、织物幅宽等进行设计,同时选择成型效果好的织物组织。试验结果表明:圆直管道预成型织物的缠绕角取决于织物幅宽、缠绕层数和管道直径;织物的经纱长度不等,按照一定的规律随缠绕层数的增加而增加;2/2斜纹组织织物的成型效果较好。     

针织运动面料的差动毛细导湿性

 根据差动毛细效应的原理,利用内外层单纤线密度的差异,采用具有导湿快干性能的异形涤纶长丝,编织具有定向传导功能的针织运动面料,通过测试比较发现:织物内外层原料的单纤线密度差异越大,织物的差动毛细效应越显著;当织物内外层单纤线密度比值相同时,若织物组织结构不同,其差动效应大小也不同;以3层组织结构织物的差动效应尤为显著。     

双层及多层电磁屏蔽织物的屏蔽效能

为研究多层电磁屏蔽织物屏蔽效能情况,通过改变叠层角度、间距、叠层方式、层数,构建正交导电网格结构和单方向金属纱线平行结构的双层及多层电磁屏蔽织物,采用法兰同轴法测试其0.3~1.5 GHz内的屏蔽效能。结果表明,经纬向具有同样金属纱线间距时,织物屏蔽层厚度小于趋肤深度则双层织物的屏蔽效能明显高于单层织物,超过趋肤深度后增加不显著;3层及以上织物的屏蔽效能增加不明显;随层间距离增加,屏蔽效能呈增加趋势。仅纬向含金属纱线的双层织物,随双层织物中纬纱交叉角度的增加,逐渐形成金属纱线正交网格结构,屏蔽效能增大;双层织物中纬纱对齐叠放时,层间距离增加则屏蔽效能增大,纬纱垂直叠放时,层间距离增加则屏蔽效能降低。     

Theoretical and experimental analysis of bending rigidity of plain and twill woven fabrics

The study of bending behavior of woven fabrics is an important issue in textile scientific researches and its industrial applications. Different behavior of fabrics such as drape, comfort, and handling can be understood by this study. Bending rigidity of fabric depends on several factors such as weave geometry, bending rigidity of yarn, and yarn density. In this study, estimation of bending rigidity of woven fabric with different twill and plain structures, have been carried out using energy method. Generally, the woven fabric structure is divided into three different section lengths i.e. rigid, semi-rigid, and flexible sections. Thereafter, bi-component and tri-component models for predicting bending behavior of plain and twill woven fabric have been presented. Then, bending properties of fabric based on Shirley apparatus as well as weight per area as a physical property were measured. Good agreement between measured and predicted values, validated our theoretical models for obtaining bending rigidity, except considerable differences observed between experimental and predicted values using bi-component model of plain fabric. Therefore, using assumptions in calculation of the ratio of rigid section length to flexible section length (R₁), the modified model of plain fabric has been proposed.     

棉毛纹织物设计中色彩空间混合原理的应用

纹织物具有经、纬组织循环数大，色纱与组织结构配合可使其织表产生立体感很强的花纹图案的特点，但其组织结构设计过程却很复杂，这一点在多经、多纬纹织物设计中就更加突出。文章论述了在多经、多纬棉毛纹织物设计中，利用色彩空间混合原理达到利用少量色纱使织表色彩丰富、立体感强的目的，以及使其组织设计直观明了，简化设计过程的方法。     

基于三维悬垂模型和织物面密度的织物匹配

为能够根据织物的悬垂形态快速准确地匹配到与给定织物综合性能相近的织物样本,利用自主搭建的悬垂织物三维扫描装置获取了悬垂织物的三维点云数据。将三维点云封装为三角形网络后,利用局部线性嵌入的方法对悬垂织物三角形网格重采样,使不同的悬垂织物三维模型具有相同的顶点数目和三角形拓扑结构;然后基于重采样三角形网格提出了2种织物匹配方法,即基于传统悬垂指标和织物面密度的织物匹配以及基于曲率统计直方图和织物面密度的织物匹配;最后计算了织物力学特征的相似度,以此相似度为基准对织物匹配结果进行评价。结果表明:基于悬垂指标和织物面密度的织物匹配准确率为86.91%;基于曲率统计直方图和织物面密度的织物匹配准确率为93.79%。     

Thermo-physiological comfort properties of double-face knitted fabrics made from different types of polyester yarns and cotton yarn

Double-face knitted fabrics with hydrophobic inner and hydrophilic outer layers are characterised by their advantageous thermo-physiological comfort property that facilitates the transport of sweat from skin to outer fabric layer where it can be evaporated easily. In this study, for the production of double-face knitted fabrics, cotton yarn as hydrophilic yarn type and five different polyester filament yarns consisting of standard polyester, hollow polyester, micro polyester, textured polyester and textured micro polyester as hydrophobic yarn type were used. In order to determine the thermo-physiological comfort properties of the fabrics, air permeability, water vapour permeability, thermal conductivity, thermal resistance and overall moisture management capacity were measured. The results were comparatively analysed using statistical methods. The experimental results demonstrated that the polyester-type yarns and the combinations of them with the cotton yarn in fabric layers affected the thermo-physiological comfort properties significantly. The fabrics with polyester-type inner face and cotton outer face showed the best moisture transmission properties.     

Study on heat transmission through multilayer clothing assemblies under different convective modes

The present work reports a detailed study on dry thermal resistance of multilayered clothing assemblies under different modes of heat transmission (i.e. non-convective mode, natural convection and forced convection). A series of multilayered fabric assemblies have been created with different combinations of fabric layers (like plain woven, nonwoven wadding, warp-knitted spacer fabric, weft-knitted breathable coated and weft-knitted aluminium coated) and air gaps of different thicknesses between fabric layers. Significant impacts of thickness of air gaps and mode of heat transmission on thermal resistance of multilayered clothing assemblies have been observed. The thermal resistance of the fabric assemblies increases with the increase in the thickness of air gap in between fabric layers. The thermal resistance of all the fabric assemblies at any given air layer thickness is highest under non-convective mode of heat transmission, followed by natural convection mode and the forced convection mode shows least thermal resistance. Incorporation of coated fabric in the outer layer reduces the effect of forced convection. ANOVA has been prepared and F value has been calculated to find the effect of modes of convection, type of fabric and thickness of air layer on thermal transmission properties. The results obtained from this detailed study will help in designing multilayered clothing assemblies suitable for different climatic conditions.     

三维弹性机织物的结构与织造

为了顺利织造三维弹性机织物,分析了三维弹性机织物的结构特点,认为按照确定织物的层数及外观形态、绘制织物的经向截面图、确定引纬顺序、设计穿综图和穿筘图、确定纹板图和组织图、计算总经根数的顺序,可实现顺利织造.并指出在织造过程中应选择合适的纱线、采用分层定位装置、控制吊综高度、采用多织轴、采用全开梭口、采用多只梭子织造等.