Abstract: A spinning unit is provided for an air jet spinning machine with a spinning nozzle used to manufacture yarn from a fiber strand. The spinning nozzle has an inlet for the fiber strand, a vortex chamber, a yarn forming element protruding into the vortex chamber, and a draw-off channel for the yarn. An additive supply is assigned to the spinning nozzle and designed so that the spinning nozzle is supplied with an additive. The yarn forming element has at least one additive duct that ends in the vortex chamber or the draw-off channel. The additive supply encompasses an additive supply line connected to the additive duct so that an additive introduced into the additive duct via the additive supply line can be introduced into the draw-off channel and/or the vortex chamber. A process for operating an air jet spinning machine with at least one spinning unit is provided. An additive is added, at least intermittently, to the spinning nozzle of the spinning unit while it is operating with the help of an additive supply.

Abstract: A method for operating an air jet spinning machine having at least one spinning unit with one spinning nozzle for producing a yarn is provided. During the operation of the spinning unit, the spinning nozzle feeds a fiber composite through an inlet in a predefined transport direction. The fiber composite within a vortex chamber of the spinning nozzle receives a twist with the assistance of a vortex air flow, such that a yarn is formed from the fiber composite. With the assistance of at least one sensor system, the yarn leaving the outlet is monitored with regard to defined yarn flaws. The production of yarn is interrupted upon the detection of a corresponding yarn flaw. Between the detection of the specified yarn flaw and the interruption of the yarn production, a cleaning process is carried out during which an additive is fed to the spinning unit and is applied to the fiber composite and/or the yarn produced from the fiber composite and/or on parts of the spinning nozzle.

Abstract: The invention relates to a method for operating an air spinning machine, whereas the air spinning machine features at least one spinning unit with one spinning nozzle (2) for producing a yarn (6), whereas, during the operation of the spinning unit, the spinning nozzle (2) feeds a fiber composite (3) through an inlet (4) and in a predefined transport direction (T), whereas the fiber composite (3) within a vortex chamber (5) of the spinning nozzle (2) receives a twist with the assistance of a vortex air flow, such that a yarn (6) is formed from the fiber composite (3), which ultimately leaves the spinning unit (2) through an outlet (7), whereas, with the assistance of at least one sensor system (11), the yarn (6) leaving the outlet (7) is monitored with regard to defined yarn flaws (26), and whereas the production of yarn (6) is interrupted upon the detection of a corresponding yarn flaw (26).

Abstract: The invention refers to a spinning unit of an air jet spinning machine with a spinning nozzle (1) used to manufacture yarn (2) from a fiber strand (3) fed to the spinning nozzle (1), in which case the spinning nozzle (1) has an inlet (4) for the fiber strand (3), a swirl chamber (5) located inside, a yarn forming element (6) protruding into the swirl chamber (5) and a exhaust duct (24) for the yarn (2) as well as an outlet (7) for the yarn (2) produced in the interior of the spinning nozzle (1).

Abstract: A component for an air jet spinning arrangement, in particular a spindle point, comprises a yarn withdrawal channel having an entry opening for drawing a yarn out of a vortex chamber of the air jet spinning arrangement. The component comprises at least one air outlet opening connected to the yarn withdrawal channel for discharging air from the yarn withdrawal channel during a piecing process. The component may comprise an injector channel for feeding back a yarn end back counter to the withdrawal direction during a piecing process. The injector channel, which is connectable to a compressed air source, can be connected by means of an opening to the yarn withdrawal channel and be positioned opposite the entry opening of the yarn withdrawal channel. The air outlet opening can be connected to the yarn withdrawal channel between the entry opening of the yarn withdrawal channel and the mouth of the injector channel.