Drafting device, spinning station and method

The drafting device with controlled roller pairs and coordinated operations addresses fiber sliver compression and yarn inconsistencies in air-jet spinning, enhancing yarn uniformity and efficiency by minimizing breakaway torques and maintaining roller warmth.

EP4756086A2Pending Publication Date: 2026-06-10SAURER SPINNING SOLUTIONS GMBH & CO KG
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Patent Information

Application Number
EP2026167264
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-06-06
Filing Date
2024-06-05
Publication Date
2026-06-10

AI Technical Summary

Technical Problem

Existing spinning processes in air-jet spinning machines face issues such as fiber sliver compression and inconsistent yarn quality due to idle rollers and improper timing during yarn joining, leading to defects and resource inefficiencies.

Method used

A drafting device with independently driven roller pairs and controlled operating modes, along with a method and control device to manage roller speeds and accelerations, ensures uniform yarn production by minimizing breakaway torques and maintaining roller warmth, allowing for coordinated fiber feeding and yarn joining.

Benefits of technology

The solution enhances yarn uniformity, reduces resource consumption, and prevents defects by optimizing the spinning process through controlled roller operations and coordinated fiber handling, resulting in a more efficient and consistent yarn production.

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Abstract

The invention relates to a drafting device for a textile machine, in particular an air-jet spinning machine, wherein the drafting device can have several pairs of rollers that can be driven independently of one another. The roller pairs can be designed and arranged to guide a fiber ribbon between an upper roller and a lower roller of each pair during their rotational operation in order to stretch the fiber ribbon. The drafting device can be designed and configured to carry out a spin-up process after the fiber ribbon has been cut within the drafting device. To optimize the spinning process, the drafting device is designed and configured to selectively add at least two pairs of rollers via their drives during the spin-up process.
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