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- Title
抽吸式喷气涡流纺装置及纺制金属丝包芯纱 的实验分析.
- Authors
王兴宝; 奚传智; 王 科; 王家源; 裴泽光
- Abstract
Vortex spinning is a new spinning technology that adopts the swirling airflow formed inside the nozzle to form the yarn which is composed of a core made of parallel untwisted fibers and the spiral sheath fibers wrapping around the core fibers. This special two-layered structure makes vortex spinning especially suitable for spinning core-spun yarns. The core-spun yarn containing a metal wire fabricated by vortex spinning is a new type of conductive yarn. However in the process of vortex spinning the high-speed swirling airflow will make a portion of fibers overcome the twisting force to become lost fibers which will reduce the amount of fiber on the yarn surface. This will result in the exposure of the metal wire on the yarn surface which will deteriorate the yarn quality. Therefore it is of great significance to design the vortex spinning nozzle with reduced lost fibers. In order to reduce the amount of lost fibers during the spinning process of core-spun yarn containing a metal wire the vortex spinning nozzle is designed and manufactured. According to the spinning principle a vortex spinning nozzle with several air suction holes arranged on the wall of the yarn passage through the spindle is designed. The modified spindle is composed of the main body air suction pipe and end cover. The main body and end cover of the spindle are manufactured by casting molding method with epoxy resin as the material. For the manufacture of air suction pipe a micro twist drill is used to drill holes on the wall of the copper pipe with an outer diameter of 1. 6 mm an inner diameter of 1. 3 mm and a length of 73 mm. In order to study the effect of the suction airflow and different structural parameters of the suction holes on the fiber loss and yarn breaking tenacity five air suction pipes with different parameters are designed and manufactured for the spinning experiments with the spindle without suction holes taken as the experimental control group. The method of measuring yarn linear density is used to indirectly characterize the amount of lost fibers under different working conditions. On this basis the Minitab software is used to statistically analyze the measurement results with 95% confidence intervals. The Grubbs criterion is used to test whether there are abnormal values in the data. ANOVA is used to study the effect of suction hole diameter and axial length of air suction region on the fiber loss during the spinning process and yarn breaking tenacity. The results prove that compared with the traditional nozzle adding air suction holes on the the wall of the yarn passage through the spindle can effectively reduce the fiber loss during the spinning process and increase the yarn breaking tenacity. The effect of hole diameter in the range between 0. 2 mm and 0. 4 mm on the amount of lost fibers is found to be insignificant while the core-spun yarn exhibits highest tenacity at the hole diameter of 0. 2 mm. As the axial length of air suction region changes from 25 mm to 34 mm there is no significant effect on the fiber loss and breaking tenacity of yarn. The results of this study can provide a new idea for the design of air-jet vortex spinning nozzle device.
- Publication
Advanced Textile Technology, 2023, Vol 31, Issue 1, p176
- ISSN
1009-265X
- Publication type
Article
- DOI
10.19398∕j.att.202206051