Abstract: An open-end spinning device for an open-end spinning machine includes a rotor housing and a spinning rotor having a rotor cup accommodated in the rotor housing. A drive for the spinning rotor is arranged in a drive housing. At least one receptacle for a cover element that closes the rotor housing during spinning operations is provided. The rotor housing includes an adjustable stop for the cover element, the stop positioning the cover element in an axial direction of the spinning rotor.

Abstract: An open-end spinning device for an open-end spinning machine includes an individually drivable spinning rotor having a rotor cup accommodated in a rotor housing. An individual drive for the spinning rotor arranged in a drive housing. A receptacle for a cover element that closes the rotor housing during spinning operations is provided. The rotor housing defines a central support part fixable to a machine frame of the open-end spinning machine. The rotor housing is formed as one piece with the drive housing and the receptacle for the cover element.

Abstract: An opening roller housing (1) for an opening roller (2) of an open-end spinning machine (3) has a feed opening (4) for feeding a fiber material (5) into the opening roller housing (1), a delivery opening (6) for drawing opened individual fibers (7) out of the opening roller housing (1), a trash removal opening (8) for extracting trash (9) out of the fiber material (5), and an inner circumferential wall (10), which surrounds the opening roller (2) during operation and has a fiber-guiding area (11), which extends from the feed opening (4), over the trash removal opening (8), and up to the delivery opening (6). The opening roller housing (1) includes a hollow cylindrical ring (12).

Abstract: A method for operating a spinning device of a rotor spinning machine, and associated rotor spinning machine are provided in which a spinning rotor includes a rotor cup and a rotor shaft that is set into rotation with the aid of a drive situated in a drive housing. The drive is operatively connected to the rotor shaft, and the rotor shaft is supported in the drive housing by a bearing. The rotor cup is situated in a rotor housing to which vacuum is applied, and the rotor shaft extends between the drive housing and the rotor housing through a connection opening such that when a vacuum is drawn in the rotor housing during a spinning process, a vacuum is also drawn in the drive housing. Compressed air is feed into the drive housing via an air inlet at intervals to clean one or both of the drive housing and the bearing.

Abstract: An opening roller for an open-end spinning device includes a drive shaft and a roller body connected to the drive shaft. The drive shaft includes a coupling element for connection to a driven shaft of a drive. The coupling element includes a form-locking element. An open-end spinning device is also provided that incorporates the opening roller.

Abstract: A method for producing a rotor cup for an open-end spinning rotor includes forming separating structures on a front-side rim of the rotor cup for breaking up and preparing a yarn end for piecing. The separating structures are formed by a non-mechanical manufacturing method without contact between the front-side rim and a mechanical forming tool. A rotor cup formed in accordance with the method is also provided.

Abstract: The invention relates to a workstation of a rotor spinning machine including a spinning rotor (3) mounted so as to be rotatable about a rotational axis (X), wherein the workstation comprises a cleaning unit (1) including a mechanical cleaning element (2) for cleaning an inner surface (21) of the spinning rotor (3). According to the invention, it is provided that the cleaning element (2) is movably arranged on the workstation in such a way that, starting from a neutral position in which the cleaning element (2) is not in contact with the spinning rotor (3), the cleaning element (2) can be moved into various cleaning positions for various inner diameters of the spinning rotor (3), wherein the cleaning element (2), in the particular cleaning position, is in contact with the inner surface of the spinning rotor (3).

Abstract: A thread guide unit is used for drawing off a thread out of a rotor of a spinning unit of an open-end spinning machine. The thread guide unit includes a draw-off tube, and a compressed air nozzle configured with the draw-off tube. A thread outlet element extends into the draw-off tube. The compressed air nozzle includes a mouth formed as a gap between an inner diameter surface of the draw-off tube and the thread outlet element. A method for operating a spinning unit of an open-end spinning machine having the thread guide unit is also provided.

Abstract: A bearing system and associated method of operation are provided to support a spinning rotor having a pot and a shaft of an open-end spinning device with two radial bearings and at least one axial support bearing, wherein at least one of the radial bearings is an active magnetic bearing. The axial support bearing is configured such that a magnetic bearing acts in opposition to one or both of an aerostatic air bearing or a mechanical starting element.

Abstract: A method for operating a spinning device of a rotor spinning machine, and associated rotor spinning machine are provided in which a spinning rotor includes a rotor cup and a rotor shaft that is set into rotation with the aid of a drive situated in a drive housing. The drive is operatively connected to the rotor shaft, and the rotor shaft is supported in the drive housing by a bearing. The rotor cup is situated in a rotor housing to which vacuum is applied, and the rotor shaft extends between the drive housing and the rotor housing through a connection opening such that when a vacuum is drawn in the rotor housing during a spinning process, a vacuum is also drawn in the drive housing. Compressed air is feed into the drive housing via an air inlet at intervals to clean one or both of the drive housing and the bearing.

Abstract: An opening roller for an open-end spinning device includes a drive shaft and a roller body connected to the drive shaft. The drive shaft includes a coupling element for connection to a driven shaft of a drive. The coupling element includes a form-locking element. An open-end spinning device is also provided that incorporates the opening roller.

Abstract: The invention relates to a method for producing a rotor cup (10) for an open-end spinning rotor (1), with which a front-side edge (16) of the rotor cup (10) is provided with separating structures (17) for breaking up and preparing a yarn end (5a) for spinning in, whereas the separating structures (17) are deposited by a non-mechanical manufacturing method, in particular by a non-mechanical ablation method. The invention also relates to a rotor cup (10) for an open-end spinning rotor (1) with an inner rotor wall (12) and an outer rotor wall (13), a rotor bottom (14) and a front-side edge (16) opposite the rotor bottom (14), which is provided with separating structures (17) for breaking up and preparing a yarn end (5a) for spinning in, whereas the separating structures (17) feature a surface with a micro-profile (20).

Abstract: A bearing system and associated method of operation are provided to support a spinning rotor having a pot and a shaft of an open-end spinning device with two radial bearings and at least one axial support bearing, wherein at least one of the radial bearings is an active magnetic bearing. The axial support bearing is configured such that a magnetic bearing acts in opposition to one or both of an aerostatic air bearing or a mechanical starting element.

Abstract: A rotor cup for spinning a fiber material includes a coupling device to detachably connect the rotor cup to a rotor shaft. The coupling device includes a connecting means for transfer of torque from the rotor shaft to the rotor cup and for axial securing of the rotor cup on the rotor shaft, and a centering means for centering the rotor cup on the rotor shaft. The centering means may include a cone-shaped extension or cone-shaped receiver defined on the rotor cup. The connecting means may include an extension on the rotor cup, with the centering means being a centering element separate from the connecting means and defined as one of a cylinder pin fixed in the rotor cup or a centering bore arranged in the rotor cup. An open end spinning rotor may include the rotor cup.

Abstract: A spinning unit of an air jet spinning machine with a spinning nozzle, which serves the purpose of producing a yarn from a fiber composite fed to the spinning nozzle. The spinning nozzle features an inlet for the fiber composite, an internal vortex chamber, a yarn formation element protruding into the vortex chamber along with an outlet for the yarn produced inside the vortex chamber. The spinning unit is allocated with an additive supply, which is designed to supply the spinning nozzle with an additive. The additive supply includes at least one top frame fixed on the spinning nozzle, through which the additive is able to be fed to the spinning nozzle. In addition, a top frame for fixing on a spinning nozzle of an air jet spinning machine is proposed.

Abstract: This invention relates to a thread guide unit (6) for drawing off a thread (4) from a rotor (2) of a spinning unit (1) of an open-end spinning machine with a draw-off tube (18) and a compressed air nozzle (21). In accordance with the invention, it is proposed that thread outlet element (19) is provided, a thread outlet element (19) is provided and a mouth (23) of the compressed air nozzle (21) is formed as a gap between the draw-off tube (18) and the thread outlet element (19). The invention also relates to an open-end spinning machine with a multiple number of spinning units (1), whereas each spinning unit (1) features a spinning assembly (3), a thread guide unit (6) in accordance with the preceding description, draw-off rollers (5), a spooling unit (9, 11) and a thread setting unit (15, 14, 16).

Abstract: A method and system for operating an air jet spinning machine, that features at least one spinning unit with one spinning nozzle for producing a yarn. During normal operation of the spinning unit, a fiber composite is fed to the spinning nozzle through an inlet and 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, which leaves the spinning nozzle through an outlet. After an interruption in yarn production, a piecing process is carried out, with which one yarn end on the spool side moves counter to the transport direction through the spinning nozzle, is overlaid with one end of the fiber composite after passing through the spinning nozzle and, together with this, is brought through the inlet into the spinning nozzle. After conclusion of the piecing process, the production of yarn is continued through the resumption of normal operation.

Abstract: A spinning point of a spinning machine includes a spinning unit, a drawing-off device for the yarn downstream of the spinning unit and a yarn storage downstream of the drawing-off device for the intermediate storage of a section of yarn. The yarn storage has a sensor system for monitoring the filling level of the yarn storage (7). The spinning point includes a winding device for the yarn downstream of the yarn storage, along with a return unit, with the assistance of which an end of the yarn found within the yarn storage after a yarn break is returned into the area of the spinning point. The winding device (9) is stopped in the case of a yarn break in such a manner that, after the stop, an end section of the yarn remains within the yarn storage (7).

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 (1) for producing a yarn (2), whereas, during the normal operation of the spinning unit, the spinning nozzle (1) 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 (1) receives a twist with the assistance of a vortex air flow, such that a yarn (2) is formed from the fiber composite (3), which ultimately leaves the spinning nozzle (1) through an outlet (6), and is spooled on a sleeve with the assistance of a spooling device (7), whereas, after an interruption in yarn production, a spinning-in process operation is carried out, with which one yarn end (23) on the spool side moves counter to the transport direction (T) through the spinning nozzle (1), is overlaid with one end (24) of the fiber composite (3) after passing thro

Abstract: The invention relates to a spinning unit of an air spinning machine with a spinning nozzle (1), which serves the purpose of producing a yarn (2) from a fiber composite (3) fed to the spinning nozzle (1), whereas the spinning nozzle (1) features an inlet (4) for the fiber composite (3), an internal vortex chamber (5), a yarn formation element (6) protruding into the vortex chamber (5) along with an outlet (7) for the yarn (2) produced inside the vortex chamber (5). In accordance with the invention, it is proposed that the spinning unit is allocated with an additive supply (8), which is designed to supply the spinning nozzle (1) with an additive (9), whereas the additive supply (8) includes at least one top frame (10) fixed on the spinning nozzle (1), through which the additive (9) provided by an additive supply line (14) of the additive supply (8) is able to be fed to the spinning nozzle (1). In addition, a top frame for the fixing of a spinning nozzle (1) of an air spinning machine is proposed.