The Effect Of Disc Swirl Spinning Parameters On The Quality Of Disc Swirl Spun Yarn

Disc swirl spinning is a new-type non open-end spinning process. It makes use of jet air toproduce yarn in order to resolve the matters in air-jet spinning. It substitutes roller drafting systemwith combing roller drafting system, which ensures that the drafting system of disc swirl spinninghas the advantages of high drafting speed, high drafting efficiency, little abrasion, and etc.To understand the effect of the parameters of disc swirl spinning on spinning quality, mainparameters of disc swirl spinning that would affect spinning quality had been discussed firstly.They are the size of core filament, the pressure of the first nuzzle, the pressure of the second nozzle,combing roller speed, feed quantity of cotton, sliver linear density, feed tension and unwind tensionof core filaments. Through former research, core-filaments spun yarn was chosen as evaluationobject for the reason that its spinning process was steady. The yarn was spun with variedparameters of process, and the tenacity performance, as well as the coverage performance, wastested.The method of single-factor analysis was used to analyze the tenacity and coverageperformances of the yarn processed in the condition of different spinning parameters. And a furtheranalysis was made by double-factor analysis on two parameters,which are feed quantity of cottonand sliver linear density that maybe have interaction. Finally, results were got as following:1,when the size of core filament is 50 denier, the quality of core yarn is distinctly better thanthat of 150 denier.2,when the pressure of the first nozzle is 0.30～0.35MPa,and the pressure of the secondnozzle is 0.60～0.62MPa,the yarn quality is much better than those in other conditions.3,when combing roller speed is 6000~8000 r/min,feed quantity of cotton is 1.695~2 g/min(the smaller, the better),sliver linear density is 2~2.58g/m(the smaller, the better),the yarnquality is much better than those in other conditions. Besides, the interaction of the feed quantity ofcotton and the sliver linear density must be considered in disc spinning process.4,when feed tension of core filament is 0.012~0.05N, the yarn shows a good tenacity andcoverage performance.5,when unwind tension of core filament is 0.04 ~ 0.056 N, the yarn shows a good tenacity andcoverage performance.6,the tenacities of all of the disc core spun yarns are better than those of the core filaments,which shows that sheath fibers bear a part of yarn tenacity.