Modification on closed fiber-converging device of swirl spinning and yarn performance

In order to explore a new method to lead yarn in the swirl spinning,the closed fiber-converging device of swirl spinning is improved in this paper.The converging device is designed with a leading yarn channel and pulling rollers.The yarn is formed by fetching the converged fiber bundles and then twisting the bundles through the swirl nozzle.This paper compares the fiber-converging device before and after modification and the principles of yarn forming,analyzes the differences in properties and structures of the yarns produced by the converging device before and after modification and the influence of the swirl pressure on the properties of the yarns produced by the converging device after modificationn.The results indicate that this method can be used to spin cotton yarns,and the appearances of the yarns are different from those produced by the converging device before modification.Under optimum conditions,the yarns produced by the converging device after modification exhibit better tenacity and evenness,and their quality is significantly influenced by the swirl pressure.