| Ring spinning technology is widely used because of its strong adaptability of raw materials,good yarn quality and high yarn count,but there are also some problems in ring spinning technology.However,there are some problems such as more hairiness on the surface of yarn and irregular hairiness distribution.In this paper,the motion regular of the fiber in the yarn spinning triangle is studied,and the application status of high-quality spinning technology is analyzed.On the one hand,it aims to solve the strong demand for the improvement of yarn quality(both the appearance and strength of compact spinning and the hand-feeling of ring spinning).On the other hand,in order to work hard on high efficiency and low energy consumption,a spinning method combining thermally induced mode reduction control with load concentration control is proposed to solve the contradiction between low energy consumption and high quality.In this paper,the correlation mechanism and law of thermal properties and thermal tensile properties of representative fiber materials are studied,and the decisive factors affecting the movement of fiber in the yarn spinning triangle area are summarized,so as to set up a hightemperature thermally induced control module in the triangle area to explore the influence of different temperature thermal fields on the yarn forming behavior and law.The results show that the short-term exposure at 160 ℃ does not affect the fiber structure,the modulus of cotton fiber decreases slightly with the increase of temperature,while the modulus of polyester fiber decreases greatly.At 160 ℃,the harmful hairiness of cotton fiber,viscose fiber,polyester fiber and polyester/cotton blended yarn decreased by 39.8%,64.6%,78.8% and 72.8% respectively,the evenness remained unchanged,the strength increased by 4.9%,5.1%,6.5% and 6.4%respectively,and the snarling number decreased by 1.2%,19.6%,18.9% and 8.6% respectively.Then,this paper constructs a method of controlling fiber yarn formation by load constrained agglomeration,which can reshape the yarn spinning triangle,regulate fiber yarn formation by layers,and realize the step-by-step control spinning of full inner fiber transfer and high-density surface fiber agglomeration.The results show that: under the S3 contact mode,the compact disc has the greatest effect on the yarn stress,so the 3 mm hairiness reduction rates of cotton yarn,viscose yarn,polyester yarn and polyester/cotton blended yarn are 74.3%,65.8%,43.1% and 56.8% respectively,and the breaking strength increases by 5.0%,5.1%,3.3% and5.5% respectively;The optimal load weight of cotton yarn,viscose yarn,polyester yarn and polyester/cotton blended yarn are 3g,3g,4g and 3g respectively.Under the optimal load concentration,the hairiness reduction rate of 3mm is 74.6%,59.7%,51.7% and 68.9%respectively.The evenness performance gradually deteriorates with the increase of load weight,and the strength increases by 5.0%,2.6%,3.2% and 5.7% respectively.Finally,the mechanism of thermally induced mode reduction and the mechanism of load constraint are effectively coordinated in the yarn spinning triangle,and a thermally induced assembly is designed,which is composed of a thermally induced control module and a compact platen.The experimental results show that the thermally induced assembly has stronger control force on the fiber,and the thermal insulation layer can make the fiber fully and evenly heated,and reduce the heat loss.The 3 mm hairiness reduction rate of cotton fiber yarn,viscose fiber yarn,polyester fiber yarn and polyester/cotton blended yarn spun by thermally induced layered spinning is 77.6%,69.0%,79.2% and 77.6% respectively,and the strength increase is 5.6%,5.7%,7.7% and 7.5% respectively;The snarling reduction rates were 5.6%,24.8%,32.2% and19.8%,respectively.The results show that the most part of performance improvement effect is better than that of the above two spinning technologies. |
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