In recent years, the development of new spinning technology in cotton textile industry rapidly, the rotor spinning with its own advantages, has become the main force of new spinning technology, the rotor speed and joint machine automation, multi spindle, spinning varieties and spinning quality automatic monitoring system, equipment stability and reliability etc. make great progress.

Although the market is still the subject of ring spinning, rotor spinning, but after 40 years of development, at present the yarn length calculation has accounted for 25% of the total spinning by weight, accounted for 40%. All kinds of rotor yarn has become an important variety of yarn production, its use continues to expand, the rotor spinning is no longer synonymous with cotton factory affiliated workshop and production of low-grade yarn.

Rapid technological development After 40 years of development, now the number of rotor spinning equipment and rotor yarn production has accounted for 1/3 of the world. Rotor spinning products from the initial coarse cloth, cloth uppers, table cloth and so on, the development of today's denim, corduroy, linen, knitwear and various non cotton products etc..
Zhejiang is our country spinning production big province, in 2011 the province has all kinds of rotary cup spinning machine about 400000, accounting for the spinning production capacity of about 1/8. Zhejiang Hongyang group is best spinning enterprises, according to the company development manager Dong Guandong introduction, about two years ago, the company introduced Rieter spinning machine, then foreign machinery in Zhejiang Province, the market share of less than 5%, the rotor spinning has brought good economic benefits to Hongyang group, other textile companies have to follow now, share spinning in Zhejiang province Rieter has reached 95%. From a national point of view, the past 10 years due to the new rotor spinning factory and supporting the establishment of advanced equipment, greatly enhance the varieties and grades of rotor spinning production.

Spinning advantages can not be replacedCompared with the traditional ring spinning, rotor spinning line has two characteristics: one is the raw material by scotching, carding and spinning machine, opening discharging device, can eliminate the impurity of raw materials about 90% of the total, therefore, the yarn impurity than the same number of comb ring yarn less. The two is through the two passage drawing, can reduce sliver weight unevenness, especially in the process of rotating condensates, single fiber can obtain higher times and, therefore, the length of rotor yarn irregularity than ring spun yarn is low. In addition, compared with the same number of ring spun yarn, OE yarn thousand ingots breakage is reduced by about 66.76%, loom production increased by about 33.3%, grey grade a rate increase of about l0%; and the rotor spun yarn structure suction fluffy, high dyeing rate, product luster.

Hongyang group Dong Guandong said, spinning process shorter, higher capacity, labor costs in the more expensive today, equipment automation is a trend and methods to solve the problems. Rotor spinning is the direct spinning sliver and rolled into a bobbin, and omit the roving winding two process. Equipment reduced, the corresponding plant area and energy consumption can be saved, the production efficiency has been greatly improved. In the case of 19.7tex yarn, spinning speed of ring spinning at 20 m / min or so, the use of automatic rotor spinning machine for spinning speed can reach 120~150 M / min, with semi automatic rotor spinning machine for spinning speed can reach 100~120 M / min, respectively is 5~8 times of ring spinning. In each of the rotary cup spinning machine with 360 head spinning device, automatic rotor spinning machine is 4 (1440 head) or semi automatic rotor spinning machine 5 Taiwan (1800) can reach the production capacity of 10000 spindles of ring spinning.

Rotor spinning is also an advantage in terms of employment. The traditional ring spinning process is more, the production efficiency is low, the manual operation is more important than the traditional ring spinning. The rotor spinning is shortened, especially due to the process of automatic and semi automatic rotor spinning machine after use, the manual operation is simplified, reduce labor intensity, improve labor productivity, the labor can be greatly reduced, according to the same yield calculation, rotor spinning than ring spinning saves labor at 50% left and right, which makes the contradiction textile enterprise employment, recruitment difficulties can be solved to some extent.

In recent years, domestic cotton price difference has become an important factor in the development of cotton spinning enterprises distress. Compared with ring spinning, rotor spinning can be widely used to solve the problem of high cost of cotton. To the free end spinning spinning principle, from the note to a spinning in spinning device, so the length of the fiber ring spinning is not strict, cotton, wool, silk, hemp length difference between short fiber and all kinds of chemical fiber can be used in a rotary cup spinning machine, at the same time in the spinning device of rotor spinning machine the second fiber loosening and impurity removing opportunities, so low grade raw materials can be spun yarn with good yarn number.

From the analysis of yarn quality index: in addition to single yarn strength than ring spun yarn with low 10~15%, such as single yarn unevenness, roughness (hairiness number) and the appearance of defects in rotor spinning are better than that of ring spun yarn.

Lifting the space is still hugeAlthough rotor spinning has some advantages over ring spinning, it still has room for improvement. Recently, the development of rotor spinning products in China continue to expand the field of development, but the mainstream products are mainly concentrated in the following 30 low yarn processing, there is no obvious competitiveness. Rotor spinning line products only strive to innovate, to achieve high-end products, differentiation, in order to compete with the "imported yarn" to win.

Hongyang group of rotor spinning equipment for rectification process of Lida 360 rotor spinning 30 units, of which 20 units of automatic equipment, 10 Taiwan automatic doffing, Nissan 40~50 tons of yarn. Dong Guandong said that at present in Hongyang group spun spinning products to support the basic 30~40 based blended yarn. As the main product of rotor spinning, the low order products and pure cotton products are in the initial stage of rotor spinning