Hollow Guide Shaft Body, Air Spinning Device, And Yarn Winding Machine Including The Same

Abstract: ABSTRACT HOLLOW GUIDE SHAFT BODY, AIR SPINNING DEVICE, AND YARN WINDING MACHINE INCLUDING THE SAME A hollow guide shaft body 32 allows fiber affected by a swirling airflow to swirl around in an air spinning device 5, and a fiber passage 39 is formed for a fiber twisted by the swirling airflow to pass through. This hollow guide shaft body 32 includes a base material part 50 having electrical conductivity, an intermediate layer 51 that is formed on a surface of the base material part 50 and is harder than the base material part 50, and a surface layer 52 that is formed on at least a part of a surface of the intermediate layer 51 and is harder than the intermediate layer 51. The intermediate layer 51 has a hardness of 1,000 Hv or more and 1,500 Hv or less, and a thickness of 60 μm or more and 200 μm or less. Fig. 6

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