Lesson Fifteen：Finisher Drawing, Roving and Spinning异丙醇钛
(并条、粗纱和细纱) Finisher Drawing
Slivers from either the carding unit or the combing unit, depending on the ultimate yarn desired, are processed through the finisher–drawing. This is the process by which fibers of different types can be blended together to form blended yarns. Eight slivers are drawn together to produce the drawn sliver. If a 50/50 polyester / cotton blend is to be made, there will be four slivers of polyester fiber and four of cotton; if a 65/35 blend is ordered, there will be five polyester slivers and three cotton. As with the breaker drawing, rollers moving at different speeds smooth and combine the slivers and pull them into a thin layer then into the drawn sliver.
并条
从梳棉机或精梳机下来的棉条，根据对纱线的最终要求，进一步在并条机拉线护套上加工。在此工序，不同类型的原料进行混合，以便生产混纺纱线。在末道并条机上，八根棉条并合在一起 被牵伸成熟条。如果要生产50/50涤棉混纺纱，应该由四根涤纶条子与四根棉条并合。如果要生产将条子并合、理顺并牵伸成薄层，然后并合成熟条。三维人体扫描
强电井The finisher–drawing operation is usually repeated. The second time, however, eight slivers from the first finisher – drawing step are subjected to the same operation. The drawn sliver is about the same size as, or perhaps slightly smaller than, the card or comb slivers. As yet no twist has been imparted into the fiber assemblage(聚集), although the delivery of the sliver to the cans tends to twist the sliver slightly.
并条一般要进行两次。在进行第二次并条时，第一个并条机生产的八根棉条被送到第二个并条机上进行同样的梳理。生产的熟条与粗梳条或精梳条直径相同或稍细。到目前为止尚未给条子加过捻，但在将条子导入条筒时有弱捻加入。
Roving
Slivers from the finisher drawing are taken to the roving frame, where each sliver w
ill be attenuated until it measures approximately one–eighth of its original diameter. The drawn sliver is fed between sets of rollers each of which rotates faster than the one behind it. The front rollers rotate about ten times faster than the back set of rollers. This pulls the fibers out, reduces the diameter to the strand(股), and further parallelizes the fibers. A slight amount of twist is imparted to give strength. The strand, called roving, is laid onto a bobbin.
粗纱
从末道并条出来的熟条直接供给粗纱机。在粗纱机上，棉条被拉细至约为原来直径的1/8。熟条从罗拉之间喂入。沿条子的前进方向，罗拉的转速逐渐提高。罗拉的转速为上一对罗拉的10倍，这样就对条子产生了牵伸作用，从而降低其直径，并进一步使纤维平行排列。条子上加上了弱捻以便使其具有一定的强度，形成的纱条称为粗纱，被卷绕到筒管上。
Spinning
The final process in ring spinning of single yarn is the spinning operation. During s
s602pinning the roving is attenuated to the desired diameter, and the desired amount of twist is inserted（添加）. The roving is fed down into the spinning area, where it feeds between sets of rollers. Just like in the全部视频列播放表本站 roving step, the front set of rollers rotates faster than the back one. In spinning, the front set rotates about 30 times faster than the back seat. This difference in speed attenuates the yarn and makes it even, smooth and uniform. The attenuated yarn is fed down, guided through a U – shaped guide called a traveler, which moves around the take – up package or bobbin on a ring, hence(因此) we get the name “ring spinning”.
细纱
利用环锭纺纱工艺纺制单根纱线的最后一个工序是细纱。在细纱生产中，粗纱被拉伸至所需要的细度，同时加上适当的捻度。粗纱从细纱机的上方喂入，并通过一对对的罗拉。与粗纱工序相似，前罗拉的转速高于后罗拉的转速。一般前面一对罗拉的转速是后面一对罗拉转速的30倍，这样速度的差使纱条抽长拉细，变均匀，变光滑。拉伸变细菌武器纱线向下方输送，并受到一个被称为钢丝圈的U型导纱件的控制。钢丝圈围绕卷装或筒管在钢领上回转，“环锭纺纱”的名字就是这样得来的
第15课：并条、粗纱和细纱
并条
从梳棉机或精梳机下来的棉条，根据对纱线的最终要求，进一步在并条机上加工。在此工序，不同类型的原料进行混合，以便生产混纺纱线。在末道并条机上，八根棉条并合在一起被牵伸成熟条。如果要生产50/50涤棉混纺纱，应该由四根涤纶条子与四根棉条并合。如果要生产将条子并合、理顺并牵伸成薄层，然后并合成熟条。
并条一般要进行两次。在进行第二次并条时，第一个并条机生产的八根棉条被送到第二个并条机上进行同样的梳理。生产的熟条与粗梳条或精梳条直径相同或稍细。到目前为止尚未给条子加过捻，但在将条子导入条筒时有弱捻加入。
粗纱
从末道并条出来的熟条直接供给粗纱机。在粗纱机上，棉条被拉细至约为原来直径的1/8。熟条从罗拉之间喂入。沿条子的前进方向，罗拉的转速逐渐提高。罗拉的转速为上一对罗拉的10倍，这样就对条子产生了牵伸作用，从而降低其直径，并进一步使纤维平行排列。
条子上加上了弱捻以便使其具有一定的强度，形成的纱条称为粗纱，被卷绕到筒管上。
细纱
利用环锭纺纱工艺纺制单根纱线的最后一个工序是细纱。在细纱生产中，粗纱被拉伸至所需要的细度，同时加上适当的捻度。粗纱从细纱机的上方喂入，并通过一对对的罗拉。与粗纱工序相似，前罗拉的转速高于后罗拉的转速。一般前面一对罗拉的转速是后面一对罗拉转速的30倍，这样速度的差使纱条抽长拉细，变均匀，变光滑。拉伸变细菌武器纱线向下方输送，并受到一个被称为钢丝圈的U型导纱件的控制。钢丝圈围绕卷装或筒管在钢领上回转，“环锭纺纱”的名字就是这样得来的
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