Rotor spinning method and apparatus for three opening roller

The present invention employs a multi-stage rotor spinning carding method comprising administering to cotton carding, coagulation twisted, the yarn is wound. Carding multistage carding roller, i.e., the first opening roller, the second opening roller and the third roller are arranged parallel carding composition. Multi-stage speed incremental opening roller, the rotational speed of the first opening roller is 3000-5000rpm, the rotational speed of the second opening roller 6000-10000rpm, the rotational speed of the opening roller 3 is 12000-20000rpm, multistage comb roller comb density is increased stepwise, reduced combing work competition level. In one aspect of incremental drafting by stripping, and a flexible draft ratio to achieve the flexibility of the tampon; on the other hand by increasing the total draw ratio of carding system, the ability to achieve matching carding rotor spinning ability, enhance the adaptability and rotor spinning rotor spinning further improve productivity.