Abstract: The paper introduces the concepts of CNC spinning, flexible spinning and digital processing of yarn. Based on the self-developed three-channel CNC ring spinning frame, the paper also introduces its software and hardware system and network management mode, establishes the digital model of spinning process, as well as the control mechanism of yarn structure and spinning process, and puts forward the flexible spinning process based on CNC spinning system. Meanwhile, it provides the spinning process of multicolor blended yarn, segment colored yarn, gradient colored yarn, slub yarn, section-color slub yarn, and shows the related yarn and fabric products.

Key words: CNC spinning; intelligent manufacturing; digital spinning; structural parameter of yarn; blended colored yarn; segment colored yarn; gradient colored yarn; section-color slub yarn