Process for producing elastic core yarn with a ring spinning machine.

摘要

The invention relates to a method and an apparatus for producing elastic core yarn with a ring spinning machine, wherein a drafting system (1) a fiber structure (2) is fed, the fiber structure (2) when passing through the drafting system (1) is warped and by the Outgoing pair of rollers (3) leaves the drafting system (1), and via a yarn guide (4) to a rotor (5) and wound on the on a ring (6) rotating rotor (5) on a rotating spool (7). The fiber structure (2) is supplied at the inlet to the pair of output rollers (3) an elastic endless thread (8) via a pair of delivery rollers (9), wherein the endless thread (8) by a corresponding peripheral speed ratio between the pair of delivery rollers (9) and the pair of output rollers (3) is stretched and spun after leaving the output roller pair (3) by the action of rotor (5) and coil (7) in the fiber structure (2) and the fiber strand (2) is transformed into an elastic yarn with the stretched endless thread (8). When spinning a full bobbin (7), the peripheral speed ratio between the pair of output rollers (3) and the pair of delivery rollers (9) is adjusted so that the elongation of the endless thread (8) is reduced.