网格圈负压式集聚纺须条半自由端加捻模型

Semi-Open-End Twist Model of Fiber Strand in the Condensing Zone in Pneumatic Compact Spinning with Lattice Apron

针对网格圈负压式集聚纺集聚区须条存在附加捻度的现象,提出了"半自由端加捻"模型,即集聚区须条表面存在部分自由端纤维,在气流等作用下对主体纤维进行包缠加捻,形成皮芯结构。在此基础上建立了自由端单纤维运动模型,通过数值求解得到其运动轨迹,进而可以分析集聚区须条的加捻情况。通过对比计算值与试验值,验证了半自由端加捻模型的正确性,同时也完善了纺纱的加捻理论。

The semi-open-end twist insertion model was proposed for the existence of additional twist of fiber strand in the condensing zone in pneumatic compact spinning with lattice apron.It is believed that there are some open-end fibers on the surface of the fiber bundles,and major fibers are wrapped by them under the action of airflow,so as to form a skin-core structure.On this basis,the model of open-end single fiber motion is established,and the motion trajectory can be obtained by numerical solution,and then the twisting situation of the strip is analyzed.Through the comparison between calculated values and experimental values,the correctness of the semi-open-end twist insertion model is verified,and the twisting theory of the spinning is also enriched.