Yarn withdrawal nozzle for an open-end rotor spinning arrangement and method of making same

摘要

A yarn withdrawal nozzle for an open-end rotor spinning arrangement is provided which includes a spiral-shaped surface in the yarn deflecting area which extends essentially over the entire yarn deflecting area and designed as a continuous spiral without interruptions. In addition thereto, the nozzle throat of the yarn withdrawal nozzle includes a further surface with structure downstream of the spiral-shaped surface, including rounded notches or curved humps. Both the spiral-shaped surface and the downstream structure are so designed that they are capable of transferring forces to the yarn without damaging same. The yarn withdrawal nozzle is moulded with a mould separation provided in an area downstream of the nozzle throat to facilitate assembly.