Spinning Station Yarn Clearer with Defect Length Display
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Solution Overview
Problem
In semi-automatic spinning machines, operators face challenges in completely removing yarn defects from the package during the piecing process, especially for longer defects, leading to a high risk of re-introducing defective yarn sections into the production line.
Innovation Solution
A spinning station equipped with a yarn clearer and an information unit that displays the required yarn length to be unwound from the package, using visual or capacitive sensors to monitor yarn defects and provide operators with precise length specifications to ensure complete removal of defects before resuming production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automatic yarn defect detection is implemented with yarn clearer, then yarn quality monitoring is improved, but the complexity of the spinning station increases
Solution Approach 1:
The controller is designed to perform multiple functions: it controls the spinning means, operates the winding apparatus, monitors yarn defects through the yarn clearer, calculates the required yarn length for removal, and provides instructions to the operator. This multi-functionality consolidates what would otherwise be separate systems into a single integrated controller, improving reliability while managing complexity.
Solution Approach 2:
The yarn clearer acts as an intermediary device between the spinning means and the winding apparatus, providing defect detection data to the controller. This intermediary role allows the system to maintain a clear functional architecture where each component has a specific role, managing overall system complexity while enabling sophisticated quality monitoring.
2Reliability
If yarn production is interrupted upon defect detection, then yarn quality is improved, but productivity decreases
Solution Approach 1:
The controller calculates the required yarn length for removal in advance and provides this information to the operator before production resumes. This preliminary calculation and instruction provision allows for quick resumption of production with minimal downtime, as the operator immediately knows how much yarn to remove without needing to measure or estimate, thus reducing the productivity impact of quality interruptions.
Solution Approach 2:
The system implements a feedback loop where defect detection triggers automatic interruption, the controller calculates the necessary corrective action (yarn removal length), and instructions are provided to the operator. This structured feedback mechanism ensures quality is maintained while minimizing production disruption through rapid, informed resumption of spinning.
3Ease of operation
If manual piecing process is used after defect detection, then operational flexibility is maintained, but the risk of re-introducing defects increases
Solution Approach 1:
The controller provides feedback to the operator by displaying the exact length of yarn that must be removed before resuming production. This quantitative feedback transforms the manual piecing process from a subjective estimation task into a precise, guided operation, ensuring that the defective section is completely removed while maintaining operator control and flexibility in the resumption process.
Solution Approach 2:
The controller performs preliminary calculation of the required yarn removal length based on the detected defect position and characteristics, and provides this information to the operator before the piecing operation begins. This preliminary action ensures that the operator has all necessary information to correctly remove the defective section, eliminating guesswork and ensuring complete defect removal while preserving manual operational flexibility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures accurate removal of yarn defects, reducing the risk of re-introducing defective yarn and enhancing the reliability of the subsequent processing chain by providing clear visual cues for operators on the length of yarn to be removed.
Implementation Method 1
using visual or capacitive sensors to monitor yarn defects
Implementation Method 2
using visual or capacitive sensors to monitor yarn defects
Data Source
AI summary
The invention relates to a spinning station (1) of a spinning machine, wherein the spinning station (1) has a spinning means (2) for producing a yarn (3) from a sliver (4) fed to the spinning means (2), wherein the spinning station (1) has a winding apparatus (20) for winding the yarn (3) onto a package (16), said winding apparatus (20) being arranged downstream of the spinning means (2) in a transport direction of the yarn (3), wherein the spinning station (1) has a yarn clearer (5) arranged between the spinning means (2) and the winding apparatus (20), the yarn being monitorable for yarn defects with the aid of said yarn clearer (5), and wherein the spinning station (1) is assigned a controller (6) which is configured to interrupt the production of the yarn (3) if a defined yarn defect is detected. The invention proposes that the spinning station (1) has an information unit (7) with the aid of which it is possible to display to an operator of the spinning station (1) how much yarn (3) has to be at least unwound from the package (16) located in the winding apparatus (20) following the interruption to the yarn production in order to ensure that the yarn section having the yarn defect has been completely removed from the package (16). Furthermore, a yarn clearer and a method for operating a spinning station are proposed.