Spinning unit of an air jet spinning machine and the operation of such a machine

US9719192B2 · kind B2 · utility

Assignee

• Maschinenfabrik Rieter AG · CH

Inventors

• Markus Kübler · Geislingen, DE
• Gernot Schäffler · Wäschenbeuren, DE
• Martin Widmann · Donzdorf, DE

Key dates

• Filing date: Jul 30, 2015
• Grant date: Aug 1, 2017
• Expiry date: Sep 24, 2035

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01H2700/21
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

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. During the piecing process, at least temporarily, additive is applied at the end of the fiber composite.