英语翻译Yarns as manufactured and packaged are not in the optimu

英语翻译
Yarns as manufactured and packaged are not in the optimum condition to be used to form fabrics. after yarn formation, both spun and continuous filament yarns are not immediately usable in fabric forming systems. Package size, build and other factors make it necessary for the yarn to be further processed to prepare it to be handled efficiently during fabric formation.
For weaving and warp knitting,many yarns are presented simultaneously in the form of a warp sheet.these yarns are taken from packages called beams.shuttle looms need a special filling yarn package,or quill,which fits in the shuttle, while shuttleless looms and weft knitting machines use yarn from large packages called cheeses or cones.
From the above it can be seen that the yarn,packaged as it comes from spinning,is virtually useless.it must be repackaged to meet the particular needs and demands of the fabric forming system in which it is to be used.this,in fact,is one of the functions of yarn preparation,to put the yarn on a suitable package for a particular fabric forming system.
The first step in yarn preparation for both knitting and weaving is winding.
The reasons for winding yarn are 1 to produce a package which is suitable for further processing,and 2 to inspect and clear (remove thick and thin spots) the yarn.
To perform the above tasks a winder is divided into three principal zones: 1 the unwinding zone, 2 the tension and clearing zone, and 3 the winding zone.
To rewind the yarn on a new package, it must first be removed from the old package. This is accomplished in the unwinding zone. This zone merely consists of a creel, which holds the old package in an optimum position for unwinding.
In side withdrawal, the spool must rotate in order for the yarn to be removed. The advantage of this system is that the yarn does not rotate upon withdrawal and therefore the yarn twist remains constant. Its disadvantage is that the spool must rotate. At high winding speeds, due to inertia, the rotation of the spool may lead to tension variations in the yarn. Furthermore, provision must be made to stop the spool if, for any reason, the winder stops. If this is not done the rotational momentum of the spool will cause it to remain in motion allowing yarn to be unwound without being taken up. also, upon start-up, higher tensions are developed because the winder must overcome spool inertia.
In the over-end withdrawal method, the package need not be rotated as the yarn is pulled over the end of the package.this method is the simplest and most common method of yarn withdrawal. There are,however, two factors which must be taken into account when this method of withdrawal is used.

将用于窗体织物的最佳条件不作为制造和包装的纱.纱形成后, 两者纺并且连续长丝不可立即形成系统的结构中.包大小、 生成和其他因素作出所需的进一步处理以准备织物形成过程中有效地处理纱.
织造和经编,许多纱是同时提交经编 sheet.these 纱都可以从被调用的 beams.shuttle 织机需要特殊灌装纱包或套筒,非常适合在航天飞机,虽然梭织和纬编机使用纱从称为奶酪或锥大包的包的形式.
从上面可以看出纱、 打包为它来自纺,几乎是 useless.it 必须重新打包以满足特定的需要和需求形成的系统是将 used.this,in 的事实,织物的是纱准备,穿上一套适合的纱线一特定的结构,形成系统的职能之一.
既针织、 纺织纱准备的第一步曲折.
制定一套适用于进一步处理,1 和 2 检查并清除 （删除厚和薄点） 纱筒纱的原因.
若要执行上述任务提升机分为三个主要区域： 1 放 2 区卷张力和结算区,以及 3 缠绕的区域.
若要后退上一个新的包纱,它必须首先删除从旧程序包.这是在放料区来完成的.只是此区域包含的筒子架,持有旧程序包中的平仓的最佳位置.
在侧撤出,线轴必须旋转要删除纱的顺序.此系统的优点是纱线不旋转后撤回和因此纱线捻保持不变.其缺点是必须旋转线轴.旋转的线轴上高卷绕速度,由于惯性,可能会导致纱线张力变化.此外,必须规定停止线轴,如果因任何理由,停止卷取机.如果不这样做的线轴旋转势头会导致它留在可能逆转不被允许纱的议案.另外后启动时, 更高的紧张局势开发因为卷取机必须克服线轴惯性.
在 over-end 撤出方法中,包需要旋转纱线是把拉末 package.this 方法是纱撤出的最简单、 最常用的方法.然而,有使用这种方法的撤出时必须考虑的两个因素.
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