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.

Research on A Master - slave Multi - microcomputers Control System for Hollow Spindle Fancy Yarn Spinning Machine

In this paper, a successfully studied and developed master - slave muld - microcomputers control system based on PC - BUS for hollow spindle fancy yarn spinning machine, mainly Its overall scheme, software and hardware construction, is introduced. Spinning experiments show that the system achieves satisfactory result. This system can solve the diftkultles of mechatronical fusion between domestic hollow splndk fancy yarn spuming muchine and its microcomputer control technology.

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.

Top yarn quality from a range of blends Rotor spinning machine R 36 successful in practiceRotor spinning machine R 36 successful in practice

Rieter’s customer Shangshui Xianghu Textile wants to find a way of efficiently using the cotton noils and cotton waste from the blowroom and the card and to thus profitably optimize their raw material blends. Using rotor spinning machine R 36 has provided the company with an incredibly positive experience.

Rieter Presents A New Ring Spinning Machine at the ITMA ASIA in Shanghai

On their Stand B03in Hall W2at the ITMA ASIA+CITME2010in Shanghai,Rieter will present the new G32ring spinning

AN INVESTIGATION OF MODELLING ON DRAFTING PROCCES OF WOOLLEN GILL MACHINE

The combing process of gill machine is an important link in the wool spinning technology.Inorder to improve the quality of products,it is necessary to study the new autoleveling device whichuses the modern control theory and microcomputer science.We have to set up a mathematicalmodel for object:As the woolen yarns (both input and output) are complex random process,it issuitable for CARMA (controlled autoregressive-moving average) to describe the object by meansof time series analyses of models.

Determination of the Law of Motion of the Yarn in the Spin Intensifier

The article is devoted to the study of spreading of the twisted yarn in a spinning cell. The article presents the scheme and principle of operation of the effective design of the yarn-output tube of pneumomechanical spinning machine. To determine the law of motion of a roller installed in a yarn-output tube, the tension of the thread enveloping the surface of the rotating roller was studied, as a result of which the equation of its motion was obtained. As a result of solving the equation, the values of the thread tension on the surface of the rotating roller are obtained. The dependences of the change in the tension of the thread in time are obtained depending on the angle of rotation and the mass of the roller. The recommended design of the yarn-output tube allows increasing the strength characteristics of the pneumomechanical yarn.

STRUCTURAL VARIATIONS OF HOLLOW SPINDLE WRAP SPUN YARNS

The structure of a hollow spindle wrap spun yarn depends greatly on the steadiness of bindertension and of balloon rotation.The two commonly used binder bobbin forms,the cop type andthe flanged type,both as sources of spinning condition fluctuation,are examined in order to revealtheir effects on the wrap spun yarn structure.False twist is introduced on hollow spindle spinningmachines in order to avoid strand breaks before it is tightly wrapped up.However,an investigationof the false twisti g-wrapping process shows that this inevitably causes irregular yarn tortuosity.

转杯纺纱机的发展现状及趋势

转杯纺属于自由端纺纱,具有纺纱速度高、工艺流程短、原料适用性能广等优点,是较为成熟的新型纺纱技术代表之一。文章分析了转杯纺纱机的市场情况及发展现状,阐述了转杯纺纱技术的创新应用,并提出了转杯纺纱机发展需求及思路。具体体现为:我国转杯纺装机量具有全球优势地位,国产半自动转杯纺纱机进步明显,具有国际竞争力,但全自动转杯纺纱机与国外相比差距明显,未来随着转杯纺纱机在差异化结构、差别化原料、高支数转杯纱开发方面优势的凸显,以及用户友好智能化转杯纺纱机的成功研发,转杯纺纱技术的优势将不断凸显,推动棉纺行业高质量发展。

喷气涡流纺纱机的发展现状及趋势

为了进一步推进喷气涡流纺纱机的发展,分析了喷气涡流纺纱机在全球的存量分布情况、近8年国内累计进口量及主要省份等市场情况,回顾了喷气涡流纺纱机的国内外技术发展历程,阐述了喷气涡流纺纱技术的创新应用,介绍了相关政策支持,并提出了喷气涡流纺纱机的发展思路。认为:我国喷气涡流纺纱机存量具有全球优势地位,正处于产业快速发展期,市场空间广阔,未来随着各种新工艺新技术层出不穷,在开发喷气涡流纺花式纱、包芯纱、细号纱以及差异化原料应用的优势将不断凸显,但国内急需开发拥有自主知识产权的喷气涡流纺纱机,突破关键技术装备和工艺,促使喷气涡流纺纱机在我国稳步健康发展。

高稳定性双摩擦轮网球训练机的设计

针对传统网球训练机发球轨迹控制效果差等问题,通过建立网球三维飞行轨迹数学模型,探究影响网球飞行的动力学因素,优化设计了一套网球发球系统,采用双摩擦轮网球发球装置,调整发球角度α、γ、θ和双摩擦轮旋转速度,实现对球的精确控制和调节发球速度;通过固定板和双连杆机构的组合机架,实现固定板的上下、左右移动,确保发球装置的稳定性和准确性;储球系统和控制系统的设计使球能够顺利输送和供给,实现连续发球的功能,为网球爱好者和专业运动员提供训练新路径。

从ITMA ASIA+CITME 2022看纺纱机械的技术进步

总结2022中国国际纺织机械展览会暨ITMA亚洲展览会上纺纱机械的最新技术进展。以展出的具有代表性的纺纱设备为例,重点介绍了国内外知名企业推出的新产品和创新技术,包括梳棉机、精梳机、并条机、粗纱机、细纱机、络筒机、倍捻机和新型纺纱机等。指出:展会聚焦于数字变革、绿色发展以及新兴产业跨界融合等主题,彰显了纺纱机械行业在全球经济逐步复苏的环境下对可持续和智能解决方案的关切。认为:纺纱设备的发展趋势是高效、节能、数字化、自动化和智能化。

纺纱空调系统运行仿真及机器学习辅助调控

针对纺纱车间采用传统的PID控制车间温湿度不稳定问题,采用机器学习的BP神经网络对后台历史数据进行监督学习,并建立空调设备自控参数的专家库。当PID调控产生温湿度较大波动时采用信息库建立好的空调控制参数直接介入辅助控制。基于热量平衡、湿量平衡以及风量平衡开发了纺纱空调仿真系统,并分析了风机、水泵、二回风窗、新风窗对于车间温湿度控制的影响。为验证辅助调控的效果,将BP神经网络预测的空调控制参数介入车间温湿度控制,并与传统PID控制车间的温湿度进行了对比。结果表明:采用BP神经网络辅助调控空调系统的参数,车间温湿度稳定性优于传统PID控制。认为:机器学习辅助调控纺纱空调系统可达到稳定控制温湿度的目的。

涤棉混纺段彩纱的工艺优化及风格探讨

为探讨涤棉粗纱混纺段彩纱的纺纱工艺与成纱风格,以涤棉混纺粗纱为原料,采用三罗拉牵伸法,通过HFX-A6型多功能细纱机来制备涤棉段彩纱。研究工艺参数(捻度、分段时间和牵伸倍数)对段彩纱风格(外观、结构、强伸性能、条干均匀度和毛羽)的影响,并根据其外观风格建立了段彩纱的周期结构模型。试验结果表明,增大辅纱分段时间和牵伸倍数对纱线风格具有积极的影响,而增大捻度对纱线风格具有消极的影响。当纺纱工艺的捻度为90捻/m,基纱与辅纱分段时间均为1 s,两根粗纱的总牵伸分别为22.8倍和24.0倍时,段彩纱的综合性能最为优异。

基于模糊PID的旋压机进给系统动态仿真

为了改善铝杆旋压机进给系统的控制性能,在分析进给系统中两路伺服油缸在不同工况下的运动特点后,提出电液伺服系统位移协同控制策略。首先阐述了旋压机进给系统运动过程及技术指标,并对液压进给控制系统进行设计与研究;其次根据交叉耦合控制理论,建立了AMEsim和Simulink的联合仿真模型。最后,基于模糊PID设计了双缸闭环位置协同控制结构,完成了两路油缸的位置协同控制,保证了协同误差在精度范围内。联合仿真曲线对比结果表明,基于模糊PID的控制系统的协同精度远高于传统PID控制,有较好的控制性能。

再生纤维原料纺纱相关装备及其技术特点

总结加工再生纤维原料的纺纱装备及其技术特点。简述了废旧纺织品的概况。对废旧纺织品再利用的相关技术进行了梳理,包括物理回收法、化学回收法、热能回收法和机械开松法。重点总结了瑞士立达公司和卓郎公司在2022中国国际纺织机械展览会暨ITMA亚洲展览会上展出的关于加工再生纤维原料的纺纱系统、纺纱装备及其技术特点。认为:科学有序地引导和发展废旧纺织品再利用符合我国法律、法规和发展规划;经机械开松后的废旧纺织品可再次进入纺纱流程,实现其高值化利用。

一种精确落管的电子加捻智能网络细纱机

面对纺织行业的诸多挑战,细纱机客户希望降低机器运行的故障率、减少用工成本、提高机器的精确性和生产效率,并且能够实时在线监控每一台细纱机、每一锭纱的运行状态。针对细纱机的这些关注点,设计了一种落管数量精确、变更捻度操作便捷、稳定性高并且能够实时在线监控纺纱状态的新型细纱机,有效助力纺织行业智能化升级。

一种高效稳定的细纱机伺服控制系统设计

传统细纱机的钢领板升降、加捻和牵伸运动全部靠主轴的机械传动,如果要改纺不同品种的纱线就需要大量的人力和时间来计算及更换机械齿轮,效率低下、容易出错。基于此,设计了一种高效稳定的细纱机伺服控制系统,只需在人机界面上设定所纺纱线的一系列工艺参数,细纱机的钢领板、罗拉和锭子就能够按照控制器计算出的速度高精度运行。纺纱结束后快速进行集体落纱,有利于纺织厂提高劳动生产率、降低劳动强度。

基于高压钢质无缝气瓶的高温旋压收口技术的改进与应用

为解决钢瓶瓶口部分外径、内径厚度不一致、消防钢瓶与特殊气瓶收口难、钢瓶瓶口有内黑和裂纹等问题,采用复合收口模具结构旋压机,收口道次为多道次收口方式。其中旋压机主轴转速为800 r/min,进给量为0.55~2.5 mm/r,加热温度为1000~1100℃,可加工钢管壁厚为φ7.7~φ12 mm,得到成型质量好、合格率高的高压钢质无缝气瓶。

棉纺设备生产毛麻丝等纤维的技术探讨

为了适应市场全球化、品种多样化发展趋势,提高非棉纤维的可纺性,通过分析棉纺企业现有产品研发机构及人才市场滞后的现状,概括毛、麻、丝纺生产中原料选择要点和纺纱工艺流程优化;详述棉纺设备的优势、非棉产品在前纺生产中存在的技术瓶颈,并提出改善纤维可纺性的措施。指出:纺纱技术要跨行业、跨界、跨学科进行学习交流,通过改革才能打通技术壁垒;借鉴毛、麻、丝纺设备及工艺优势以适应灵活多变的品种更新及设备工艺调整;不断完善棉纺设备体系的功能化、智能化和便捷化;发挥5G+AI、大数据与云计算智能化的作用,使棉纺企业实现资源储存,智能优化、决策、推荐与共享。