Effect of Voltage and Gauge of Electrostatic Plate on Card Sliver Quality

In order to find the effect of state device installed on a carding machine on card sliver quality, card slivers produced in conditions of different voltages and gauges were tested by USTER AFIS. The results show that, when the gauge is 1 nun, most parameters of card sliver quality are better when voltage is 600 V than those when no voltage is applied. The contents of nep, trash, visible foreign matter （VFM） and short fiber content by number （SFCn）, short fiber content by weight （SFCw）, immature fiber content （IFC） of card sliver decrease by 5.9%, 16.7%, 12.5%, 5.3%, 4.8% and 1.6%, respectively, but seed coat nep （SCN） content of card sliver doesn＇t decrease. When the electrostatic plate gauge is 2 mm and electrostatic voltage is 4000 V, the removal efficiency of neps and SCN is remarkable, decreasing by 8.7% and 25% respectively. Card sliver quality is hardly improved under any voltage when the gauge between electrostatic plate and cylinder is 3mm.

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.

多供一梳并联在自由端纺纱短流程应用的工艺创新

为了实现梳并联技术在自由端纺纱流程中的产业化应用,分析其中存在梳棉机与并条机产能不平衡问题的原因,提出多供一大缓存量生条缓存式输送梳并联系统配置方案,以及在转杯纺流程应用“偶数法则”、在涡流纺流程应用“奇数法则”的工艺设置要点;通过理论探讨、类比分析以及试纺,验证转杯纺、涡流纺流程中棉条并合或定量增大对降低混合不匀、降低结构不匀以及对牵伸的效应,提出在梳并联技术中应用“生条定量换取并合根数”的工艺新理念,并与组合式牵伸机(IDF)工艺进行类比。指出:多供一大缓存量生条缓存式输送梳并联技术方案,突破梳并联中梳棉机速度受并条机速度和生条输出线速度制约的瓶颈,其应用进一步缩短自由端纺纱流程;梳并联机组应用以“生条定量换取并合根数”的并合与牵伸新工艺理念,能达到与传统工艺相同或相近的并合和牵伸效应;多供一大缓存量生条缓存式输送梳并联技术方案在自由端纺纱短流程的应用,契合纺纱生产降本增效和管理优化的需求,其产业化推广已具备基础条件。

优化梳理器材配置,提升梳理质量

为了提高机采棉梳理质量,介绍梳棉和精梳用梳理器材的发展,优选梳棉用主要梳理器材及精梳用锡林、顶梳配置方案,通过合理调整工艺参数和试验对比,说明优化梳理器材后,可有效提高梳棉生条和精梳条等半成品质量,改善成纱质量。指出:纺纱生产中,要根据原料特性及时对梳理器材进行优选并合理调整工艺参数,同时实施技术革新措施,才能有效提升产品质量。

C51型与C70型梳棉机纺纱实践

为实现梳棉机的高速高产高质,对比分析立达C51型与C70型梳棉机的设备参数、纺纱工艺参数及梳棉条半制品质量指标、成纱指标、面料质量等。指出:与C51型梳棉机相比,C70型梳棉机的自动化、数字化、智能化水平更高,其梳理器材配置的变化导致开松、梳理、伸直、除杂、除尘、转移、重复梳理纤维率等都有明显变化;C70型梳棉机梳理效果改善、产量提高,制得的梳棉条半制品质量稳定、纱线质量较好、面料A级布率达99.6%,比C51型梳棉机更具应用优势。

JWF1212型三刺辊梳棉机纺OE 58.3 tex纱实践

为了提高JWF1212型三刺辊梳棉机纺粗号气流纺纱的产量和质量,以10%的原棉及清梳落棉、精梳落棉、线头纱等为原料纺OE 58.3 tex纱,通过上机工艺调整和梳理器材优选,对比调整前后JWF1212型三刺辊梳棉机生条指标、成纱质量以及能耗变化。指出:合适的上机工艺是梳棉机高质高产的基础保障;低等级配棉的上机工艺和梳理器材配置应增强除杂能力、减少纤维损伤、降低短绒含量;通过工艺优化和梳理器材优选,JWF1212型三刺辊梳棉机纺OE 58.3 tex纱,出条速度达260 m/min,产量为101.4 kg/h,成纱质量满足要求,且节能降耗、用工减少。

Redistribution of Impurity and Visible Foreign Matter in Cotton during Carding

Impurity redistribution during cotton carding was investigated. The content and size of impurity in card sliver,takerin droppings,flat strips,and cylinder screen droppings (including droppings under cylinder screen and cylinder-doffer triangle section)at four taker-in speeds were tested by using USTER AFIS. Results show that both total impurities and visible foreign matter (VFM)weights are increased. Impurities in cotton lap are carded and redistributed in card sliver, taker-in droppings, flat strips and cylinder screen droppings. Impurity percentage in taker-in droppings are the highest,followed by that in card sliver,that in flat strips and that in cylinder screen droppings. Cylinder screen has better dust-removing efficiency than flats. The average sizes of impurities in card sliver and cylinder screen droppings are decreased,whereas those of flat strips are increased and those of taker-in droppings is almost the same,in comparison with cotton lap. The impurity contents of card sliver,taker-in droppings,flat strips and cylinder screen droppings have tendencies to decrease with the increase of taker-in speed.

锡林刺辊速比对生条中纤维长度整齐度的影响

为进一步提升棉纤维梳理效能,针对不同刺辊转速条件下锡林刺辊速比变化对生条中纤维长度整齐度影响问题进行了试验探究。采用USTER AFIS PRO纤维性能测试系统对生条中的纤维长度分布进行了测试,并根据纤维质量-长度分布图提取相关数据,计算出短绒率和整齐度指数等指标。结果表明:刺辊转速为500~650 r/min之间不同档时,速比的增加对整齐度各指标影响幅度很小,且无明显规律性;相较于500~650 r/min,刺辊转速为700~800 r/min时,整齐度各指标整体上有小幅改善,但并不明显,基本上以速比为2.0时最优;相较于500~800 r/min,刺辊转速为850~900 r/min时,整齐度各指标明显恶化,随速比的增加,恶化趋势明显,采用小速比1.5为宜;速比对生条中纤维长度整齐度的影响与刺辊速度紧密相连,宜首先考虑刺辊转速对分梳、除杂和转移的影响,再考虑速比对纤维转移的影响。

降低精梳后并条机高架上生条频繁断头的措施

为解决精梳后并条机高架上生条频繁断头的问题,总结其产生原因与危害,从规范生产管理及运转操作、加强设备管理及维护、圈条机构精梳条拥堵调整措施3个方面,探讨降低生条断头的技术措施,即可通过温湿度控制、加强清洁、调整棉网宽度、检查牵伸加压机构与清洁片、优选梳理器材等方法实现.指出:并条机高架上生条频繁断头与精梳机粘缠、拥堵密切相关,必须加强运转管理与机台清洁,减少牵伸罗拉、胶辊的缠绕,减少集棉器、喇叭口和圈条机构的拥堵,同时要注重设备管理与维护、熟悉精梳圈条传动系统工艺路线、优化设计调整精梳圈条张力牵伸工艺等工作.

并条机并合数与棉纱和织物质量的关系

为了提高半制品、棉纱和织物质量,通过试验对比有自调匀整系统并条机和无自调匀整系统并条机,采用不同并合道数、并合根数时的普梳棉条、精梳棉条、棉纱和织物质量,分析其对纱疵的影响并提出解决方法。指出:纺纱设备和器材的发展,推动了纺纱在线控制技术的发展,在线控制技术的发展为后工序棉纱疵点的控制提供了指导,纺纱厂需根据生产实际确定并条工艺;染色不匀和横条疵点与并条机并合道数和并合根数关系密切,无论并条机是否带有自调匀整系统,使用2道并条6根并合或8根并合工艺,均有利于减少棉纱细小纱疵、控制织物染色不匀和横条疵点;在确保设备状态良好的情况下,优选并条机并合道数和并合根数,是稳定后工序棉纱和织物质量的根本。

JWF1216型梳棉机纺细旦莫代尔纤维的实践

为了提高JWF1216型梳棉机纺细旦莫代尔纤维纱的产质量,详细介绍调整JWF1216型梳棉机上机工艺、优选刺辊转速及齿型、调整配置针布型号,用长度为38 mm、线密度为0.9 dtex、回潮率为11.5%的细旦Modal纤维,纺细旦莫代尔11.7 tex纱和10.6 tex纱的试验过程;对比减小盖板—锡林隔距,增大压碎辊与剥棉罗拉间牵伸倍数,增大锡林和刺辊转速,选用梳针型刺辊、调整锡刺速比以及配套针布型号前后的成纱质量指标。指出:合适的上机工艺是梳棉机高质高产的基础保障,莫代尔纤维杂质较少,上机工艺调整和梳理器材配置应增强分梳能力、减少纤维损伤、降低短绒含量;调整后,JWF1216型梳棉机纺细旦莫代尔11.7 tex纱产量为47.5 kg/h,纺细旦莫代尔10.6 tex纱产量为59.4 kg/h,满足客户质量要求和生产需求,达到与国外先进设备同线、同质、同产的目标。

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。

梳棉机给棉板与刺辊隔距对梳棉质量的影响

用AFIS单纤维测试仪对不同的给棉板与刺辊隔距生产的生条质量进行了检测,结果表明:给棉板与刺辊隔距愈小,对纤维(尤其是长纤维)损伤愈严重;单纯以短绒率来表示纤维损伤可能是不全面的;给棉板与刺辊隔距愈小,对棉结和杂质去除越为有利,但对带籽屑棉结去除以隔距较大时比较有利。

梳棉机棉网清洁器风量对生条质量的影响

采用3种不同条件下的试验方案对生条质量进行了测试，用AFIS单纤维测试系统测试了不同风量条件下生条的短绒、棉结和杂质等质量指标。结果表明，后罩板处棉网清洁器风量太小和太大对生条质量均是不利的，在试验条件下，棉网清洁器的风量在180～240m^3／h时对生条质量的提高比较有利。

生条中短纤维含量与成纱指标的相关性分析

为探索生条中短纤维含量对纱线指标的影响,更好地通过短纤维含量指标对纱线指标进行预测,通过在不同锡林刺辊速度条件下对棉纤维进行梳理,并采用相同的后序工艺进行纺纱,将生产的生条取样,借助USTER AFIS测试仪检测纤维的长度分布,分别统计出10、12、14和16 mm以下4种短纤维的含量,同时借助条干、毛羽和强力测试仪分别检测各种实验条件下生产纱线的条干、强力和毛羽等指标,最后使用SPSS统计软件计算出4种短纤维含量指标与成纱各指标之间的相关系数。结果表明:当梳理工艺变化时,生条中短纤维含量指标与条干部分指标有较高的正相关性,与成纱强力指标不存在显著的相关性,与毛羽指标甚至是负相关。

梳棉机前棉网清洁器导板隔距设定的探讨

研究梳棉机前棉网清洁器导板隔距对生条质量的影响情况。用Uster AFIS单纤维测试系统对不同前棉网清洁器导板隔距的生条质量进行了检测。结果显示,随着导板隔距的增大,生条中纤维的平均长度、短绒含量呈现比较明显的下降趋势,纤维的伸直度有所提高。导板隔距为2 mm时杂质含量最低,导板隔距为3mm时棉结去除较理想。总体看导板隔距为3 mm最有利于改善生条质量。

梳棉生条质量与纱线质量关系的研究

为研究梳棉生条质量与纱线质量的关系,通过试验并用灰色关联分析法和最小二乘法分析了梳棉生条各参数对纱线质量指标的影响程度,得出了生条各参数对纱线品质影响的具体关系式。便于在实际生产加工中及时调整梳棉工艺,稳定和提高纱线质量。

不同型式棉网清洁器的对比研究

为研究不同型式棉网清洁器对生条质量的影响,在相同风量条件下,对导板式棉网清洁器和反齿导向盖板式棉网清洁器进行了对比试验。用USTER AFIS单纤维测试系统对上述条件所加工的生条进行了检测,结果显示:反齿导向盖板式棉网清洁器所生产的生条质量总体上要好于导板式棉网清洁器,其原因是反齿导向盖板排除短绒、杂质、棉结等的作用是一种"主动"作用,而导板式棉网清洁器对短绒、杂质、棉结等的排除是一种"被动"作用,梳棉机后罩板处棉网清洁器以采用反齿导向盖板式棉网清洁器为宜。