In 1957, Germany's Gottschild first designed and invented the vortex spinning. 1975 after China began to study, Tianjin designed and manufactured TW-4 type TW-5 type, Shanghai developed WF-2 type, countries are now not much progress in its research, mainly because of the vortex spinning research is not in-depth enough, but also with the spinning of a narrower range of suitable for the spinning of the relevant. In the process of vortex spinning, the twisting of fibres is done by means of airflow. The structure of vortex spinning spinner is simple, eliminating the high-speed rotating parts, and twisting the moving yarn with the help of high-speed rotating airflow. The spinning principle of vortex spinning is that the finished sliver is supplied to the drafting device, and the fibre bundle after drafting by the roller drafting device is output from the front roller jaws, and then enters the spinning nozzle along the spiral fibre guide channel under the effect of axial airflow at the entrance of the spinning nozzle. At the exit of the spiral fibre guiding channel there is a needle-shaped twist stopper, which bends the fibre bundle at the needle part and keeps the fibre bundle in a state where no twist is added to it and it is introduced into the vortex chamber. The front end of the fibre bundle is pulled into the yarn channel in the spindle by the drag of the formed yarn and twisted into the newly formed yarn, which becomes the core. The tail end of the fibre remains in the fibre guiding channel while being held by the jaws of the front roller. When the tail end of the fibre is no longer held by the front roller jaws, it is no longer held in the fibre guiding channel by the centrifugal action of the air vortex in the spinning nozzle, but is radially dispersed by the rotating air flow at the spindle inlet, and driven by the air vortex, it falls down on the cone at the front end of the spinning spindle, and at the same time rotates with the air vortex and winds up in the subsequent yarns, which are then exported through the channels of the yarn inside the spinning spindle. The yarn formed consists of a core of approximately parallel, untwisted fibres and a helically wrapped fibre at the periphery. The yarns formed and exported are removed from defects by an electronic yarn cutter and wound onto a cylinder. The fibres themselves receive different loads depending on the sum of the retention time of the fibres in the nozzle and the energy density of the injected air. As a result, the characteristics of the yarn change. The higher the speed, the softer the yarn, the lower the speed, the stiffer the yarn. Vortex spun yarns have the characteristic of being hard on the outside and soft on the inside.
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