空心锭纺纱系统集成及其纺制花式纱线特点分析OA

To clarify the characteristics and yarn formation mechanisms of four hollow-spindle spinning modes,including encircling spinning,covering spinning,wrapping spinning and fancy spinning,firstly,a systematic classification was established based on an analysis of the combined configurations and processing features in mechanisms such as drafting,overfeeding,twisting,false twisting and winding.Then the effect of the false-twist hook during the initial and secondary twisting of the core yarn was analyzed,as well as the function of the hollow-spindle in the wrapping process of the binding yarn,a twist distribution model during the twisting process was established.The influence laws of overfeeding rate and twist on the formation of knot yarn,slub yarn,wave yarn,loop yarn and braid yarn were investigated.Four typical hollow-spindle spinning process configurations and corresponding examples of multi-component composite yarns and fancy yarns were presented.The results indicated that the multi-level structure of yarns can be expanded through the multi-level serial connection of the hollow-spindle twisting system and the configuration of opposite or identical directions.The diversification of yarn morphology can be achieved through multi-channel differential drafting and overfeeding.Through dynamic drafting,alternating overfeeding and twisting of multi-component raw materials,composite-structured fancy yarns can be produced in one-step process.It is considered that hollow-spindle spinning technology can achieve flexible intelligent manufacturing of more efficient and diversified high-end composite fancy yarns through further optimization of system integration and process control in the future.