Research on the Loop Deformation of Flat Silk Knitted Fabric Made from Parallel Spun Silk/ramie Core Yarn

This paper analyzes the causes of loop deformation of flat silk knitted fabric made from parallel spun silk/ramie core yarn. Through the measurement and analysis on the loop deformation of various samples, it is concluded that the problem herein mentioned would be improved to a certain extent by changing the fabric density or mixknitting from yarn with different direction of twist.

Impact of the Speed of Flat of a Typical Carding Machine on the Quality of Carded Sliver and 40 Ne Yarn

The carding cycle affects the sliver quality and the subsequent yarn attributes since it is the main sliver formation step. Processing parameters assume a significant part in affecting the nature of the eventual outcome in any sorts of production. In the case of carding machine, a higher production rate makes the operation more sensitive. And this will cause degradation in product quality. So optimization of speed is the talk of the town in spinning field [1]. Extreme higher speed can prompt fiber harm and unnecessary neps generation will corrupt the end result. Again lower speed will lessen the production rate which isn’t reasonable. So we need to discover the ideal speed which will be advantageous to both product quality and production rate. In carding machine, real operational activity happens between flats and cards [1]. From an ordinary perspective, high produce able cards generates higher level of speed. Speed of the cards impacts the carding cycle and the nature of the yarn and in practical point of view, flat’s level of speed is advanced and optimized. The aim of the project was to find out the optimum flat speed in the context of yarn quality. 40 Ne cotton yarns were produced with the slivers manufactured at different flat speeds such as 240, 260, 280, 300 and 320 mm/min. The quality parameters of slivers and yarns were tested and analyzed.

Study on Licker-In and Flat Speeds of Carding Machine and Its Effects on Quality of Cotton Spinning Process

Spinning has a significant influence on all textile processes. Combinations of all the capital equipment display the process’ critical condition. By transforming unprocessed fibers into carded sliver and yarn, the carding machine serves a critical role in the textile industry. The carding machine’s licker-in and flat speeds are crucial operational factors that have a big influence on the finished goods’ quality. The purpose of this study is to examine the link between licker-in and flat speeds and how they affect the yarn and carded sliver quality. A thorough experimental examination on a carding machine was carried out to accomplish this. The carded sliver and yarn produced after experimenting with different licker-in and flat speed combinations were assessed for important quality factors including evenness, strength, and flaws. To account for changes in material qualities and machine settings, the study also took into consideration the impact of various fiber kinds and processing circumstances. The findings of the investigation showed a direct relationship between the quality of the carded sliver and yarn and the licker-in and flat speeds. Within a limited range, greater licker-in speeds were shown to increase carding efficiency and decrease fiber tangling. On the other hand, extremely high speeds led to more fiber breakage and neps. Higher flat speeds, on the other hand, helped to enhance fiber alignment, which increased the evenness and strength of the carded sliver and yarn. Additionally, it was discovered that the ideal blend of licker-in and flat rates varied based on the fiber type and processing circumstances. When being carded, various fibers displayed distinctive behaviors that necessitated adjusting the operating settings in order to provide the necessary quality results. The study also determined the crucial speed ratios between the licker-in and flat speeds that reduced fiber breakage and increased the caliber of the finished goods. The results of this study offer useful information for textile producers and process engineers to improve the quality of carded sliver and yarn while maximizing the performance of carding machines. Operators may choose machine settings and parameter adjustments wisely by knowing the impacts of licker-in and flat speeds, which will increase textile industry efficiency, productivity, and product quality.

Study on Licker-In and Flat Speeds of Carding Machine and Its Effects on Quality of Cotton Spinning Process

Spinning has a significant influence on all textile processes. Combinations of all the capital equipment display the process’ critical condition. By transforming unprocessed fibers into carded sliver and yarn, the carding machine serves a critical role in the textile industry. The carding machine’s licker-in and flat speeds are crucial operational factors that have a big influence on the finished goods’ quality. The purpose of this study is to examine the link between licker-in and flat speeds and how they affect the yarn and carded sliver quality. A thorough experimental examination on a carding machine was carried out to accomplish this. The carded sliver and yarn produced after experimenting with different licker-in and flat speed combinations were assessed for important quality factors including evenness, strength, and flaws. To account for changes in material qualities and machine settings, the study also took into consideration the impact of various fiber kinds and processing circumstances. The findings of the investigation showed a direct relationship between the quality of the carded sliver and yarn and the licker-in and flat speeds. Within a limited range, greater licker-in speeds were shown to increase carding efficiency and decrease fiber tangling. On the other hand, extremely high speeds led to more fiber breakage and neps. Higher flat speeds, on the other hand, helped to enhance fiber alignment, which increased the evenness and strength of the carded sliver and yarn. Additionally, it was discovered that the ideal blend of licker-in and flat rates varied based on the fiber type and processing circumstances. When being carded, various fibers displayed distinctive behaviors that necessitated adjusting the operating settings in order to provide the necessary quality results. The study also determined the crucial speed ratios between the licker-in and flat speeds that reduced fiber breakage and increased the caliber of the finished goods. The results of this study offer useful information for textile producers and process engineers to improve the quality of carded sliver and yarn while maximizing the performance of carding machines. Operators may choose machine settings and parameter adjustments wisely by knowing the impacts of licker-in and flat speeds, which will increase textile industry efficiency, productivity, and product quality.

金属固定盖板齿条纵横向齿距对纺纱质量的影响

为了研究固定盖板纵横向齿距对纺纱质量的影响,在纺纱工艺条件及其他齿条不变的条件下,分别改变纵向齿距及横向齿距进行纺纱试验,并对生条质量及成纱质量进行测试。结果表明:当横向齿距为0.55~0.9 mm,纵向齿距为1.8~2.8 mm时,成纱的IPI值改善不明显,纱线断裂强力恶化,出现嵌杂问题;当纵向齿距由1.8~2.8 mm增加至2.1~3.4 mm,横向齿距不变时,成纱的IPI值显著增加,成纱断裂强力提高,纱线条干CV值恶化;当纵向齿距加大到2.8~3.7 mm,横向齿距减小到0.35~0.7 mm,成纱的IPI值减少、断裂强力提高,条干CV值改善,无嵌杂,生条中棉结杂质直径都有所减少。最终得出结论,在短纤维梳理过程中,金属固定盖板齿条纵向齿距加大,结合横向齿距减小,有利于提高成纱质量。

梳棉机后罩板棉网清洁器位置与纺纱质量

在梳棉机后罩板处加装了两根固定盖板 ,并分别在固定盖板前与后加装棉网清洁器 ,在相同工艺条件下进行了纺纱对比试验。结果表明 ,在固定盖板后加装棉网清洁器 ,经AFIS仪检测生条质量指标较好 ;在固定盖板前加棉网清洁器 ,成纱质量较好。经综合分析 ,棉网清洁器以安装在固定盖板前为好。

段染纱横编织物花纹预测

为方便快捷地预测出给定段染纱编织的横编织物所形成的花纹形状,对段染纱色段的分布特征和横编织物的编织方式进行分析,探讨了段染纱色段在横编织物中的分布规律,确定其可用三角波函数来模拟。并用Mat Lab语言编程模拟出给定段染纱编织的横编织物花纹,预测结果与编织实样有很好的一致性。研究结果表明:段染纱色段分布特征结合横编的往返编织方式,可在织物上形成多变的花纹,花纹形状与段染纱色段循环长度和织物横列用纱长度密切相关;用Mat Lab程序可简便地实现花纹的预测,生产中可通过改变编织针数来获得所需的花纹,也可根据花纹的需要来选用或设计段染纱。

扁平异染超亮涤纶拉伸变形丝的生产技术

使用大有光聚酯切片先制得半取向丝(MOY)后,再经特殊的假捻变形工艺路线开发生产出扁平异染涤纶拉伸变形丝(DTY)。在加工过程中开发出了特有的不匀拉伸装置,可以使得纤维产生不匀率高的拉伸效果,从而达到纤维片段上的高染色不匀,丰富了产品的外观特色。通过合理选用工艺流程和纺丝假捻变形工艺,可生产出品质高、性能良好的扁平异染超亮涤纶DTY。

熔体直纺205 dtex/192 f细旦扁平涤纶的开发

介绍了熔体直纺生产205 dtex/192 f细旦扁平涤纶预取向丝(POY)的工艺路线,并讨论了纺丝温度、冷却成形、上油位置及方式、卷绕工艺、喷丝板选型等对生产细旦扁平涤纶POY的影响。结果表明:选择较高的纺丝温度,严格控制环吹风条件,适当提高集束点位置,优化上油均匀性,降低纺丝速度,适当提高卷绕张力,降低成型角,可制得质量较好的细旦扁平涤纶POY。

四针床电脑横机的全成形工艺

针对目前毛衫生产无法一体成形,下机后需再进行套口和缝合等不足,研究了四针床电脑横机的全成形工艺。从机器的针床、机头三角系统、拉力装置、送纱和导纱装置的工作原理出发,对平针组织、罗纹组织以及开口的成形编织原理进行分析,并以典型的毛衫为例,用四针床电脑横机,探讨其结构成形方法。结果发现:基于4个针床配置的电脑横机使得毛衫能够进行满针筒状编织;四针床电脑横机全成形编织的基础是圆筒编织,具体包括筒状平针结构编织、筒状罗纹结构编织以及开口编织;通过选择编织方向和配置纱嘴,能完成典型款式毛衫,如高领长袖套衫、长袖开衫、无袖套衫,在四针床电脑横机上的一体成形。

石英纤维单向编织扁带的结构与性能

为了提高天线罩织物的性能,提出一种编织定位方法,以27 tex石英纤维为编织纱,以190 tex石英纤维为轴纱,研制了单向编织扁带.采用岛津万能材料试验机对不同编织工艺参数的单向编织扁带试样进行拉伸性能测试,对比单向编织扁带与合股纱线的断裂强度,分析扁带的拉伸断裂机制.结果表明:单向编织扁带外观均匀,结构稳定,纤维强力利用率高,与合股纱线相比,单向编织扁带的厚度更薄,织物的厚度减小了1/3,织物断裂强度更高,可以替代合股纱线进行织物的织造,提高织物性能.试验结果表明:最优的编织工艺参数为轴纱双合股,编织角为13°.

三维横编间隔织物的编织工艺及其性能

为开发适合不同应用领域的曲面复合材料,采用新型三维曲面间隔结构,在电脑横机上用芳纶纱编织了带有双层罗纹连接中间层的横编间隔织物,探讨了编织步骤和编织工艺。在此基础上通过在间隔织物纬向的2个表层衬入芳纶增强纱,改进了织物的力学性能。通过调整编织程序,开发出不同曲率的间隔织物。在英斯特朗电子万能材料试验机上测试有增强纱和无增强纱织物的横、纵向拉伸性能,比较分析这2种织物的应力-应变曲线。结果表明,在其他条件相同时,有增强纱的三维横编间隔织物横向、纵向拉伸应力增加明显,变形较少,织物尺寸稳定。

段染纱横编袜子花纹形成方法

为给段染纱横编袜子的花纹设计提供理论参考,分析了筒形织物的横机圆周编织方式,以及段染纱在筒形织物中色段的分布规律,并用圆柱螺旋线来模拟其分布规律。借助MatLab模拟出既定段染纱筒形织物的花纹,模拟花纹与织物实样花纹有良好的一致性,同时给出段染纱横编袜子花纹形成的几种方法。研究结果表明:段染纱的色段分布规律结合筒形织物的圆周编织方式,可形成多样的花纹,花纹形状可由圆筒一周的用纱长度与色段循环长度的比例关系确定;用MatLab圆柱螺旋线程序可方便地模拟出花纹;生产中可通过改变线圈长度设计横编袜子花纹,也可根据设计的花纹选择段染纱。

电脑横机成型工艺对纱线造成的强力损失分析

为预测针织毛衫组织结构的强度,研究了织针动作、纱线弹性、摩擦因数以及股线结构对纱线在电脑横机加工过程中强力损失的影响。以针织中常见的羊毛、羊绒、黄麻电脑横机产品为研究对象,阐述纱线在针织加工过程中受到的作用力。在万能材料试验机上采用不同夹具,测试纱线与不锈钢材料、纱线与纱线之间的动摩擦因数,以及不同的针织组织脱散后的纱线强力。结果表明:编织时羊绒纱较毛纱强力损伤大;编织时翻针和针床横移动作对纱线强力造成的影响明显高于编织普通组织;纱线合股根数也影响纱线强力损伤。

纱线染色工艺对成形毛针织物尺寸稳定性的影响

从纱线的染色工艺方面着手进行实验,分析纱线染色工艺对编织成形毛针织物尺寸稳定性的影响。实验表明:在其他工艺条件相同的情况下,深色织物和浅色织物的尺寸稳定性存在一定差异,这说明深、浅色纱线的染色工艺对尺寸稳定性有一定的影响,而且组织结构不同,影响程度不同。经比较发现,实验中深色织物的尺寸稳定性都不同程度地优于浅色织物,另外平纹组织织物这种差异较大,罗纹组织织物差异较小。

澳毛/高收缩阳离子涤纶/扁平阳离子涤纶/VILOFT/阳离子涤纶混纺纱的纺纱工艺

介绍了VILOFT纤维,高收缩阳离子涤纶、扁平涤纶的性能特点,分析了纤维性能对纺纱工艺和成纱风格的影响。在棉纺设备上,探索开发出18.5 tex澳毛/高收缩阳离子涤纶/扁平阳离子涤纶/VILOFT/阳离子涤纶25/25/20/20/10多组分纱的纺纱工艺方案和技术措施,成功开发出多组分毛涤新产品。该混纺纱具有纯毛产品品质,却是低比例毛产品价格,开发的织物柔软舒适,丰满滑糯,悬垂性好,毛型感强,抗皱和染色性能提高,色彩独特,色泽靓丽,是一种高附加值纺织品。

梳棉机附加分梳元件及其对梳棉质量的影响

为了探讨梳棉机附加分梳元件对梳棉质量的影响,分析了其种类和使用过程中对针齿密度、固定盖板根数和棉网清洁器的配置,通过试验对比了加装刺辊下分梳板、后固定盖板和前固定盖板在生条和成纱质量方面的影响。指出,正确使用附加分梳元件可以改进生条和成纱质量,减少生条和成纱棉结,并降低生条和成纱条干CV值;实际生产中,不能过分夸大附加分梳元件的作用,更不能用增加附加分梳元件的方法代替部分主梳理元件,或者延缓更换已衰退的针布。

亚麻纬编针织物及其拉伸性能

通过在STOLL电脑横机上开发亚麻针织物的探索,得出了保持一定的湿度,利用双股亚麻纱为原料进行编织前处理,选择合理的编织工艺参数可有效提高亚麻针织物可编织性的结论。对所开发产品的结构、面密度、织物厚度及拉伸变形能力等指标进行测试分析,结果表明:弯纱深度值为10.5时,亚麻四平织物抗拉伸能力和拉伸变形能力较优,其厚度及耗纱量适中,性价比合适,可作为抗拉伸能量吸收性能较好的、环保纺织复合材料的增强体。

包芯色纱性能及其对横编成形提花鞋面织物的影响

横编成形提花鞋面织物目前一般以涤纶长丝为原料,为提高鞋面材料的吸湿性和舒适性,通过对比8种染色后的棉/锦纶/羊毛(60/30/10)包芯纱的性能,探讨其对提花鞋面织物性能的影响。对色纱的条干、毛羽指标、拉伸性能进行了表征,用8种包芯色纱,采用常用的纬平针、1+1罗纹和1+1双反面组织等织物结构,织成鞋面针织物,研究其顶破性能、起毛起球性能及保暖性能,同时分析了包芯色纱在横编提花鞋面材料成形时的可编织性能。结果表明,黑色纱线的拉伸性能指标最低,断裂强力比淡绿色纱线下降39.9%,其织物的顶破强力也最低,可编织性能最差,尤其是在编织提花组织及翻针形成网眼结构时易出现破洞;淡绿色纱线毛羽指数最低,为34.58根/10 m,织物起毛起球最少。

基于FPGA的电脑横机导纱器控制系统设计

电脑横机导纱器的精确调度是实现复杂嵌花花型稳定编织的关键,国产系统一般最多可携带16把导纱器,较难完成复杂嵌花花型的编织。针对传统方式提出一种基于FPGA的导纱器控制方案,当上位机完成对花样文件数据解析后获取控制数据,利用PCI104总线发送给下位机FPGA,FPGA采用串行比较方式对比导纱器位置和当前机头位置数据后,实现32把导纱器的调度控制。结果表明,国产电脑横机采用该导纱器控制系统后有效提高了系统的整体性能,动态响应时间小于3.00 ms,实时性强、编织效果好,具有较高的市场应用价值。