Patent ID: 6321521
Filing Date: 2001-11-27
Classification: D01H

Abstract:
A process for cleaning an open-end spinning rotor assembly (2), comprising a rotor cup (3) having a fiber collecting groove (20) and being arranged in a vacuum chamber (5), which, while leaving an air current transfer gap (16) between an inside of the rotor cup (3) and the vacuum chamber (5), can be closed over by a movable cover (15), which cover comprises an extension (17) projecting into the inside of the rotor cup (3), which extension (17) comprises a mouth of a fiber feed channel (18) as well as a first part of a yarn withdrawal channel (19), and which can be removed from the inside of the rotor cup when the cover (15) is removed, said process comprising the following procedural steps:interruption of the fiber feed in the event of an end-break;slowing down the open-end spinning rotor (2);moving away of the cover (15) from the vacuum chamber (5) to insert cleaning elements (37) into the rotor cup (3) as well as closing of the vacuum chamber (5) after cleaning;wherein, before the actual moving away of the cover (15) for the purpose of inserting cleaning elements (37) into the rotor cup (3), the following procedural steps are additionally carried out:a temporary moving away of the cover (15) from the vacuum chamber (5) for the purpose of temporarily removing the extension (17) from the inside of the rotor cup (3), before the open-end spinning rotor (2) is slowed down to such an extent that the fibers present in the rotor cup (3) are no longer held in the fiber collecting groove (20) by the centrifugal forces; anda closing of the vacuum chamber (5) after the fibers present in the rotor cup (3) cannot be held any longer in the fiber collecting groove (20) by centrifugal forces due to the further slowing down of the open-end spinning rotor (2).