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.

一种应用于自助设备的储卡模块系统设计

针对银行网点自助设备的吞卡现象,设计了一种应用于自助设备的储卡模块。该储卡模块被放置于卡机后部,其内部有多个卡仓,用于暂存被吞入的银行卡,用户仅需验证必要的身份信息,即可取回被吞入的卡片。自助设备通过增加该模块,能大幅提高其无人化故障处理能力,符合智能化、便捷化、高效率的新型智慧银行发展模式。

转杯纺分梳辊分梳质量研究初探

为检验不同型号分梳辊的分梳质量,介绍分梳辊分梳牵伸的特点和分梳辊分类;从纺纱器结构、气流控制和分梳辊速度等方面详述其对分梳牵伸的影响;分别选用7种不同规格的分梳辊用齿条,采用棉纤维及表面更光滑、截面更接近于圆形的莱赛尔纤维进行对比试验,并用纤维损伤频率差异分析法对纤维损伤度进行可靠性验证。结果表明:除齿密最小的G型分梳辊外,棉纱线的整体质量基本上随着分梳辊针布齿密的减小而逐渐恶化;成纱质量除与分梳辊型号相关外,还受到齿部几何形态、表面粗糙度及其与喂棉机构、排杂通道及输纤通道内气流状态的适应性等综合因素的影响;分梳辊针布齿条表面粗糙度的差异对纤维损伤的影响较小,但对纱线质量影响较大。

纯棉普梳14.6 tex紧密纱生产实践

为了提升纯棉普梳14.6 tex紧密纱成纱质量,从粗纱捻系数、细纱后区牵伸倍数、细纱前罗拉隔距3方面,对纺纱工艺参数进行优选,并对比上车试纺成纱质量;通过对比YYC-570V型胶辊和国产某邵尔A硬度为68度胶辊两次回磨后的成纱质量以优选纺纱器材。结果表明:粗纱捻系数为118、细纱后区牵伸倍数为1.05、细纱前罗拉隔距为16.8 mm、使用YYC-570V型胶辊,所纺纯棉普梳14.6 tex紧密纱成纱质量改善;使用YYC-570V型胶辊,有助于企业降低员工劳动强度、减少机物料消耗、提高工作效率;优选细纱工艺和器材专件并严格管理,可确保成纱质量稳定。

梳棉棉结的控制

梳棉棉结一直是困扰纺纱企业的难题。通过刺辊速度、锡林速度、梳棉机出条速度、梳棉机定量、活动盖板速度的正交试验,得出对棉结影响的主次顺序和最优方案,并验证了最优方案是最优工艺。最优工艺为刺辊速度770 r/min、锡林速度560 r/min、盖板速度300 r/min、生条定量4.6 ktex、出条速度140 m/min。研究结果为控制梳棉棉结提供了控制方法。

梳理机的柔性梳理结构设计与工艺初探

为减少或避免纤维在开松梳理过程中的损伤,介绍柔性梳理的概念,详述柔性梳理机在自动喂毛机、喂入、刺辊及预开松、主锡林、道夫、道夫剥取等部分的结构设计理念,分析其技术优势和使用选择,总结柔性梳理设备与梳理器材配套和主要工艺调节的注意事项。指出:梳理机结构的优化设计是实现柔性梳理的基础,优选梳理器材和工艺、做好设备的维护管理是保障;在设计时用好广义的柔性梳理理念,充分理解柔性梳理的实质并将其贯穿于系统流程的全过程,从人、机、料、法、环等方面综合考虑,方能发挥好柔性梳理机的性能、充分梳理好纤维。

梳棉清洁用弹性针布断针与缠花的改善措施

为了解决高速梳棉机清洁用弹性针布易断针、易缠花问题,根据包覆位置介绍其类型及作用,分析回转盖板清洁罗拉弹性针布断针与回转盖板剥棉罗拉弹性针布缠花原因;通过将回转盖板剥棉罗拉弹性针布梳针线径优选为0.305 mm、成品针总高优化为20 mm,将回转盖板清洁罗拉弹性针布梳针线径优选为0.355 mm、成品针总高优化为17 mm,底布采用4层棉橡皮面+背布结构,使用重锤式弹性针布包卷装置,以及采用不锈钢钢丝等措施改进梳棉清洁用弹性针布。多家纺企使用表明:优化后的弹性针布包卷平面度好,回转盖板清洁罗拉弹性针布断针与回转盖板剥棉罗拉弹性针布缠花问题得到解决,使用寿命比优化前延长50%以上。

国产针布的技术进步和发展

从锡林针布、道夫针布、盖板针布、刺辊齿条、固定盖板和分梳板6个方面分析了现代梳棉针布的特点,通过对国产针布技术进步和行业现状的分析,重点阐述了国内外针布的差距及国产针布的发展方向,指出:国产针布虽然进步很大,但在先进性、可靠性,尤其是使用寿命方面,与国际先进技术水平仍存在较大差距;15系列锡林针布已接近极限尺寸;目前我国针布应将提高锡林针布的耐磨性、创新道夫针布齿型设计、加强盖板针布底布对钢针的握持力和钢针耐磨性作为发展重点,并积极开发后整理针布品种。

棉秆皮纤维素纤维的梳理与细化

为获得线密度较小的棉秆皮纤维,根据棉秆皮纤维素纤维的结构形态,采用单一罗拉梳理、单一盖板梳理、罗拉-盖板组合梳理方法对棉秆皮纤维进行机械细化处理。结果表明:棉秆皮纤维梳理之前需要进行加水并闷放12 h;对于单一罗拉梳理方法,在加水量为纤维质量的25%时,梳理后棉秆皮纤维平均长度39.7 mm、平均线密度2.42 tex;对于单一盖板梳理方法,在加水量为纤维质量的15%时,梳理后棉秆皮纤维的平均长度37.7 mm、平均线密度2.2 tex;对于加水量为纤维质量的25%的棉秆皮纤维素纤维,采用罗拉梳理2次-盖板梳理1次组合梳理方法,梳理细化后纤维平均线密度为1.9 tex,平均长度为39.6 mm,平均落纤长度为15.9 mm以及平均落纤线密度为3 tex。

PMAC运动卡在轧辊自动探伤机的应用

轧辊探伤机中,探头需要在轧辊旋转过程中自动进给,根据探伤要求的探头覆盖面积,自动控制轧辊的旋转速度及探头的进给速度,这是轧辊探伤中的关键技术。在为某公司设计的首台机床式轧辊自动探伤机运行良好的基础上,对基于PMAC的直流伺服控制系统控制轧辊旋转及探伤探头移动方面的研究进行了总结。

E62型精梳机工艺特性分析

运用电子计算机对E62型精梳机钳板及分离罗拉的运动参数进行计算,分析了E62、E7/6及E7/5型精梳机的钳板运动、分离罗拉运动、锡林梳理定时、梳理隔距、钳板的开启闭合参数、分离接合等参数的特性。

刺针式刺辊对纤维损伤的研究

在普通梳棉机上做刺针式刺辊与齿条式刺辊的对比试验,结果显示使用刺针式刺辊对纤维的损伤要低于使用齿条式刺辊。并就刺针刺辊对纤维损伤小的机理进行了分析,提出齿条刺辊齿顶齿宽远大于刺针针尖直径,可能是齿条对纤维损伤较大的原因之一。

转杯纺分梳工艺与棉条纤维流短绒率关系的研究

针对半自动接头转杯纺设备,以棉纤维流中短绒率为研究对象,通过单因子及正交试验研究分梳辊的规格、转速和分梳时间对纤维流中短绒率的影响。试验表明:三因素影响重要程度的排序为分梳辊规格、转速和分梳时间;纤维流短绒率会随分梳时间增加而逐渐增大,并最终趋于稳定,为接头质量的提高和成纱质量的分析提供了实践依据。

转杯纺不同喂给方式对混纺纱质量影响的研究

为研究不同喂给方式对成纱质量的影响,在配备双分梳辊的JWF1612型转杯纺改装机上进行纺纱试验,并对纱线性能进行测试。测试结果通过F检验方差分析和Tukey HSD检验表明:双分梳技术纱线的力学性能、条干CV值、细节(-30%)和毛羽指数等指标均优于单分梳技术,单、双分梳技术对成纱粗节(+35%)的影响无区别,即双分梳技术有利于提高混纺纱的成纱质量;更换纤维条的喂给位置、不改变分梳辊规格,对成纱效果的影响不明显;纺纱效果与分梳辊规格相关性大,且与其齿向无关;使用双分梳辊JWF1612型转杯纺纱机时应注意温湿度调节、设备状态良好,纱线通道光洁,以避免因粘缠而引起断头率增加,纺纱效率降低。

提高梳棉机产量的技术研究

为了提高梳棉机产量,从使用金属针布,提高锡林、刺辊转速,采用多刺辊等7个方面对上世纪50年代以来提高梳棉机产量的技术措施进行了分析,进而提出了进一步提高梳棉机产量的研究方向。指出应把提高锡林—盖板主分梳区整体分梳强度作为进一步提高梳棉机产量的主攻研究方向,并对此设想进行了初步的分析论证。

7.4 tex粘胶纱生产工艺的优化

为顺利开发出符合新型服装面料要求的纯粘胶纺织面料,主要围绕成纱单强和千米棉结两项质量指标展开工艺技术研究,对关键纺纱工艺参数,如定量、针布类型、捻系数等进行试验优化,并严格控制各工序温湿度和半成品回潮率,最终成功纺制出7.4 tex粘胶纱,其质量满足了使用要求。

针布配置对梳理质量影响的探讨

为了提高生条和成纱质量,分析了纺纱原料特性对梳理配置的要求,重点对比了进口格拉夫公司针布与国产金轮针布及金轮针布与国内某厂针布的配置调整对生条和成纱质量的影响并绘制出相应曲线,分析了生条质量提高的原因。指出:不同原料纤维对生条质量影响较大,其特性不同对梳理配置的要求也不同;虽然提高针布梳理度与针布配置密切相关,但其与针布状态、上车工艺、车间温湿度的关系也应重视;应进行多组试验,并对其结果进行跟踪,以确定最佳针布配置。合理配置针布是提高生条和成纱质量的保证。

纺纱工艺对洋麻/芳纶30/70纱线性能的影响

在棉纺系统中分别使用盖板梳理机和罗拉梳理机得到洋麻/芳纶30/70混纺纱线。与盖板梳理机工艺流程相比,罗拉梳理机工艺流程使落麻率减小65.7%,纱线强度提高27.2%,耐酸碱性分别提高11.0%和7.4%,抗静电性提高2.2倍。

转杯纺纺制纯聚酰亚胺纱工艺研究

为探索聚酰亚胺纤维的可纺性,扩大转杯纺纱产品种类,用DHU Z01型转杯纺纱试验机纺棉型聚酰亚胺纤维,在对分梳辊和假捻盘组合进行优选的基础上,使用正交试验方法对转杯纺工艺进行优化。结果表明:转杯纺纺制棉型聚酰亚胺纤维纯纺纱工艺可行,OK40型分梳辊和陶瓷螺旋假捻盘组合试纺的纱线性能优良;转杯纺工艺中影响纱线质量的因素顺序及其工艺参数为,捻系数(370)、分梳辊转速(6 kr/min)、转杯转速(45 kr/min);除此之外,假捻盘、分梳辊等器材专件的类型也是影响转杯纺纱线质量的主要因素。