167 dtex/38 f三角截面极亮松筒加弹丝开发

通过正交实验探索加弹工艺条件,开发具有最大光泽亮度,并具有筒子直接染色功能的167 dtex/38 f三角截面DTY产品。当生产速度为450 m/m in,假捻器工作盘数为1-4-1,变形温度为140℃,定型温度为220℃,D/Y比为1.8,拉伸倍数为1.59,卷缩为1.63%时,可生产出密度在0.39~0.41g/mm3的松筒丝筒,满足直接筒子染色的需求。     

专利文摘

正专利名称:一种玻璃钢化粪池筒体与支撑圈一体缠绕成型工艺专利申请号:CN201410439825.3公开号:CN104261671A申请日:2014.09.01公开日:2015.01.07申请人:杨冠军本发明提出了一种玻璃钢化粪池筒体与支撑圈一体缠绕成型工艺,通过浸胶小车和纱架将玻璃钢纤维束缠绕到模具外壁上形成玻璃钢筒体,本工艺先缠绕支撑圈后缠绕筒体,最终     

聚酰胺地毯纱在染色过程中色差的形成与控制

简要介绍了聚酰胺（BCF）地毯纱的优点及染色工艺,分析了影响染色均匀性的因素。指出选择合理的染料,严格调配过程,遵照合理的热定型工艺,即可以提高聚酰胺地毯纱的匀染性,避免出现色差,提高产品的质量。     

橡胶冷流道注射成型工艺研究

针对轨道车辆用纵向止挡橡胶部件设计橡胶冷流道注射成型模具及硫化工艺，并通过正交试验方法对塑化温度、料筒温度、一段注射速度、冷流道温度4个工艺参数对产品自由高度及刚度的影响规律进行研究。结果表明，工艺参数对产品自由高度（或收缩率）影响由大到小的排序为塑化温度、料筒温度、一段注射速度、冷流道温度，而对产品刚度影响由大到小的排序为料筒温度、塑化温度、冷流道温度、一段注射速度。本研究可为橡胶冷流道注射成型工艺的推广应用提供参考。     

复合材料对模成型工艺模具设计研究

复合材料对模成型工艺中的制品质量好坏取决于模具质量的好坏,所以模具设计至关重要,从原材料、固化温度、产品精度三方面研究复合材料对模成型工艺的模具设计。通过承力筒模具的设计及产品生产后的尺寸测量,证明了复合材料原材料、固化温度、产品精度在对模成型模具设计中的重要性,提供了如何综合三个因素进行模具设计的方案。     

高支纯棉筒子纱染色工艺研究

为了提高纱线染色质量,生产出符合客户要求的200sC/2纯棉纱线,本文结合了生产实践,针对高支纯棉纱线的特点,确定了纯棉筒子纱线染整加工工艺,包括松筒、前处理、染色和柔软处理等,给出了各工序的工艺处方、条件、流程和注意事项。结果表明,染色纱线的强度损伤小,其染色后耐洗牢度、汗渍牢度均较好,湿摩擦牢度能达到4~5级。     

某小型风力发电机玻璃钢塔筒设计计算

根据某小型风力发电机使用要求,从力学角度对其两段式等直径玻璃钢管道塔筒进行设计计算、分析。强度计算时,塔筒安全系数n分别取2、2.5、3、3.5四种情况,并考虑缠绕工艺特点及对其制作材质相关性能的离散影响等因素,计算表明安全系数n宜≥3;刚度校核时,n=3.5其强度虽满足使用要求,但其刚度不能满足塔筒顶部位移(挠度)≤200mm的要求,若需满足或接近位移要求,在内径不变情况下,塔筒厚度需增加2/3以上,其质量将增加71%以上。最后,计算表明塔顶使用位移要求较高;该塔筒可用缠绕、拉挤工艺成型,如缠绕时宜多用小角度成型;并建议塔筒宜采用变直径设计方案。     

纺丝成形工艺对针织用涤纶短纤维疵点的影响及对策

通过长期跟踪涤纶短纤维生产过程控制及产品质量指标,对纺丝成形过程中产生的疵点及染色疵点形态进行了考查,分析了环吹筒组装使用、组件组装及压力控制等主要工艺操作条件对疵点产生的影响,总结了降低针织专用涤纶短纤维产品疵点含量的纺丝工艺及操作改进措施。     

统计技术在环锭纺纱捻度设计及品质控制上的应用

在生产实践中,利用统计技术研究判断捻度工艺设计稳定与合理性,研究同时发现,在环锭纺纱线产品品质指标中,同一个产品筒纱捻度与管纱捻度存在显著性差异,在指定的置信水平0.05上筒纱的捻度高于管纱的捻度,这一规律具有普遍性。     

硬质PVC低发泡管材的成型

本介绍了挤出法生产硬质PVC低发泡管材的成型工艺、设备、及产品性能,并对发泡机理、影响发泡成型的主要因素和原材料的品种规格,成型工艺条件(温度和压力),成型模头及冷却定型装置的设计和选用等,进行了讨论,在料筒温度为40～190℃,模头温度为145～185℃,压力9.81～39.2MPa,转速10～20n/min的工艺条件下,通过挤出、冷却、定型等工序,生产出密度为0.7～0.89g/cm~3,拉伸强度为14.72MPa,泡孔均匀,表面光洁平整的PVC低发泡管材。     

FK6-600假捻变形机卷绕成形机构原理探析

通过对FK6-600卷绕成形原理及导丝器运动规律的分析,提出导致卷装丝条分布不匀,筒子两端硬度不一,卷装起皱等现象的原因是:在双锥形卷绕中由于成形摇板的作用,导丝器长臂端的运动规律不和滑块保持一致。卷装的内外层左右密度不等,丝层与丝层之间不等,故引起卷装形状不稳定。建议对限制成形摇板的倾角θ作适当的调整,可得到良好的卷装成形。     

Developments in Package Dyeing

Progress in package-dyeing yarn during the past ten years has been rapid, both in the total weight of yarn dyed, the types of fibre being dyed, and particularly in the design of dyeing machines and to a lesser extent in dyeing techniques. Polyester filament yarn is of great importance, but there have been significant developments in dyeing high-bulk acrylic yarns. In machinery developments, the outstanding features are in the rate of flow of liquor, and the frequency with which the liquor is circulated. New techniques have been developed to take advantage of these mechanical features, so that dyeing can be commenced at 135°C and the liquor dropped at this temperature, thus minimizing oligomer problems with polyester yarn. Many new disperse dyes of high sublimination fastness on polyester fibre have been introduced and these take full advantage of the new machinery and dyeing techniques. Another factor leading to wider use of package dyeing has been the need for shorter manufacturing cycles in the production of coloured yarn, particularly for woven fabrics. Worsted yarn, which would normally have been spun from dyed top is now being package dyed on a large scale. With spun yarns, the advantages of dyeing acrylic yarn in muff form have led to the rapid growth of this method of dyeing.     

基于机器视觉的管纱污渍检测算法研究

针对管纱表面污渍的质量问题,提出基于机器视觉的管纱表面污渍检测算法。先对图像进行预处理以及Sobel算法处理,消除光照不均以及背景纹理的影响,再用双高斯算法增强目标与背景的差异,然后用灰度矩形法削弱背景的噪声,最后采用动态阈值的方法提取目标。实验结果表明,该算法对管纱表面污渍的检测有一定的准确性与实时性。     

Relationship between set and bulk of package–dyed wool yarns

The loss of bulk in hand–knitting yarns as a result of package dyeing has been investigated. Simulated dyeing of packages, prepared with and without axial compression, has revealed a correlation between the bulk of the relaxed dyed yarns and the permanent longitudinal set imparted to the yarns. The strain in the yarn in the wet package, and hence the longitudinal set, is related to the hygral expansion of the yarn and the strain imposed on the yarn during winding of the package. The role of axial compression of the package in determining loss of bulk is also considered. Finally it is shown that by adding reagents to the dyebath that inhibit the setting reaction, the loss of bulk can be markedly decreased, provided also that the yarns are fully relaxed after being dyed.     

胡麻粗纱还原染料染色的理论与实践

本文探讨了胡麻粗纱的煮漂、柔软、还原染料染色工艺,尤其对生产胡麻纱染色前粗纱的柔软整理机理、作用、意义作了阐述,提出了胡麻纤维染色适宜的染料和相应的煮漂方法,并介绍了染色工艺配方。     

高速卷绕机筒管夹头的仿真分析

利用有限元软件ANSYS对高速卷绕机筒管夹头进行了转子有不平衡质量时的动力学仿真分析。结果表明:随着卷装直径的增加,筒管夹头对不平衡质量的谐响应减小;在时变状态下,空管工作时简管夹头对不平衡质量的谐响应最大;若筒管夹头空管工作时正常,则可确定筒管夹头在整个工作转速范围内都能稳定工作。     

A Technical and Economic Appraisal of Yarn Package Dyeing

A technical and economic appraisal has been made of dyeing a variety of yarns in package form. The philosophy of package dyeing has been discussed and package presentation has been considered. Future developments in the package dyehouse have been outlined together with possible processing routes. Although this study is concerned only with package dyeing, it is felt that some of the conclusions reached may, unfortunately, be equally valid for other sections of the UK dyeing and finishing industry. Greenfield studies have been undertaken, allowing for a number of processing options, from which detailed costings have been prepared. Based on these and taking current market conditions into consideration, the future of the yarn commission dyer seems uncertain. A greenfield dyehouse may only be feasible if it is used to service a yam production facility manufacturing high revenue products by modern techniques. Elimination of processes, especially winding, is essential.     

涤纶细旦POY条干不匀率和卷绕成形影响因素探讨

根据从意大利特模阿尔法(Therm oalfa)公司引进的涤纶微细旦POY 成套设备的特点,对无导丝盘直接卷绕成形条件下,影响细旦POY 条干不匀率和卷绕成形的因素进行了探讨。生产实际表明,无导丝盘高速纺细旦POY 条干不匀率受熔体质量、纺丝及卷绕条件的影响,卷绕张力,成形角及接触压力对卷装质量均有很大影响     

Theoretical study of the influence of dispersion factor on dye transport during the dyeing process

During dyeing, dispersive flow is assumed to reduce the concentration gradient of dye liquor flowing through a yarn package, resulting in a more even distribution of dye in the liquor within the package. However, little is known about the degree of significance of dispersive transport, as a proportion of the total transport of dye. This study investigates the influence of dispersion on dye transport during dyeing, based on a finite element method approach utilised in a mathematical model. The model has been applied to establish the influence of several parameters during the course of the dyeing process. This study theoretically discusses the role of dispersion on the rate of dyeing and the uniformity of dye distribution.     

Economy and Effectiveness of Post-bleaching Reactive Dyeings

The reduction in cost obtained by the alteration of the sequence of operations in wet processing, namely when bleaching is carried out after dyeing with reactive dyes instead of before, has been determined. The contribution to the reduction in cost by post-bleaching fabrics in a jig, as compared with the classical processing sequence involving bleaching in yarn form in a package dyeing machine has been included in the calculation. The effect of post-bleaching conditions on different reactive dyes has been assessed, and it has been found to be possible to choose a wide range of dyes that resist these conditions. The dyeings were observed to be brighter and the undyed yarn was of satisfactory whiteness.