The key to improve roving quality lies in reducing weight unevenness and improving yarn evenness.
提高粗纱质量的重点是降低纱的重量不匀率，提高粗纱条干的均匀度。
FA478 increases the itinerancy pneumatic suction motion, it makes the roving yarn evenness to improve.
FA478还增加了巡回式吹吸风装置，使粗纱条干均匀度明显提高。
Relation among feeding roving gauge, twist factor and yarn property were researched, property of polyacrylonitrile preliminary heat treatment in oxidizing polyester filament core-spun yarn was tested.
研究了喂入粗纱间距、捻系数与成纱性能的关系，测试分析了聚丙烯腈预氧化纤维涤纶长丝包芯纱的性能。
This article deals with foe process of spinning plied yarn by roving frame, the remaking of drafting assembly, and the twisting and winding mechanism by roving frame.
本文介绍了利用粗纱机纺制股线的工艺过程及粗纱机牵伸、加捻和卷绕机构的改造方法。
Several testing methods were designed by the author to measure the longitudinal migration and distribution of fibres along the sliver, roving and yarn.
作者用自行设计的实验方法测定了棉条、粗纱、细纱沿纵向纤维按长度分布及转移的规律。
In the spinning process equalization point of the yarn is influenced by twist, spinning tension, roving interval, and overfeed ratio. Certain relationship exists among them.
纺纱过程的平衡点受成纱捻度、纺纱张力、须条隔距及超喂率的影响，它们之间存在一定的关系。
The main products are basalt fiber roving, chopped yarn, textile yarn, sewing thread, composite reinforcement, unidirectional fabric and a variety of industrial technology fabrics.
主要产品为玄武岩纤维无捻粗纱、短切纱、纺织纱、缝纫线、复合筋、单向布及各种工业技术织物等。
In the same way it can be applied on roving, yarn and piece goods.
相同的方法还可应用于粗纱、长丝和织物。
Relation between yarn forming quality and drawing sliver & roving quality was analyzed, and relation between yarn forming quality and configuration of drawing & roving process was also discussed.
分析了熟条和粗纱质量与成纱质量的关系，并就并条、粗纱工艺配置与成纱质量的关系进行了讨论。
A lower drag board connector is used for the cleaner of the roving frame, which is used for cleaning yarn.
用于粗纱机上清洁纱线的清洁器的下涨力板结合件。
The false twist by the back roving guide in Siro spinning can affect the stability of yarn drafting and the evenness of the yarn.
赛罗纺配用的后导纱器对粗纱产生的假捻会影响细纱牵伸的稳定性和成纱条干。
As to the serious problems of yarn defect in the hollow leg of the full closed flyers on the roving frames, idea of semi-closed flyers is put forth for consideration.
针对目前粗纱机用全封闭锭翼空心臂内积存的纱疵非常突出这一问题，提出了半封闭锭翼这一概念。
This article relates how to select fixed-quantity and twist in the technology parameters of roving, and back draft in the technology parameters of spun yarn.
阐述了粗纱工艺参数中定量、粗纱捻系数以及细纱后牵伸的选择。
The result shows that pneumatic V type draft mechanism is suitable for large draft technology in production, and if weighing roving quantum, yarn quality is better than pressure of spring cradle.
结果表明，气动V形牵伸机构在生产中适合大牵伸工艺，粗纱定量加重，成纱质量较弹簧摇架加压好。
The thesis explain the production process and process specification of the raw material pretreatment, scutching. dressing. drawing. roving. spun yarn.
阐述了原料预处理、清花、梳棉、并条、粗纱、细纱的生产工艺和工艺原则。
The process requires aligning a bundle of staple fibers, pulling them out into a rope, known as a roving, and further pulling out and twisting the roving to form the yarn.
纺纱过程要求一束短纤维排成一线，将他们拉入一对罗拉中，例如粗纱，继续拉伸并加捻粗纱形成纱线。
The process requires aligning a bundle of staple fibers, pulling them out into a rope, known as a roving, and further pulling out and twisting the roving to form the yarn.
纺纱过程要求一束短纤维排成一线，将他们拉入一对罗拉中，例如粗纱，继续拉伸并加捻粗纱形成纱线。
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