Ring Spinning System Cop Quality Sorting
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Solution Overview
Problem
Current ring spinning systems face challenges in increasing productivity and yarn quality, while also reducing quality costs downstream in the textile manufacturing process, as they lack efficient methods to identify and separate yarns with production issues before rewinding.
Innovation Solution
An automatic ring spinning system that determines parameter values for each spinning position during yarn winding, assigns these values to the corresponding cop, and uses this data to make decisions on feeding the cop to the winding positions, allowing for the sorting out of problematic yarns and the production of yarn bobbins with homogeneous quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If cops are automatically fed to winding positions without quality assessment, then productivity is maintained, but yarn quality homogeneity deteriorates
Solution Approach 1:
The system performs preliminary quality assessment of cops at the spinning machine before they are fed to the winding machine. Quality values are determined and stored in advance, allowing the winding machine to selectively feed only quality-conforming cops, thereby ensuring yarn quality homogeneity without compromising productivity
Solution Approach 2:
The system implements feedback by transmitting quality values from the spinning machine to the winding machine. The winding machine uses this feedback information to make informed decisions about which cops to feed, creating a closed-loop quality control system that maintains both productivity and quality standards
2Productivity
If all cops are processed through the winding machine, then productivity is maximized, but quality costs increase due to defective yarn
Solution Approach 1:
The system extracts defective cops from the production flow by identifying them through quality assessment at the spinning machine and preventing their feeding to the winding machine. This extraction of non-conforming products avoids the waste of time and resources that would be spent rewinding defective yarn
Solution Approach 2:
The system discards cops that do not meet quality criteria by preventing their feeding to the winding machine. This selective discarding recovers time and resources that would otherwise be wasted on processing and rewinding defective yarn, thereby reducing quality costs while maintaining productivity
3Manufacturing precision
If spinning data is collected and assigned to each cop, then yarn quality improves, but device complexity increases
Solution Approach 1:
The spinning machine's monitoring system performs multiple functions: it not only monitors spinning parameters but also determines quality values and assigns them to individual cops. This multi-functionality reduces the need for separate quality assessment equipment at the winding machine, thereby limiting the increase in device complexity while still improving yarn quality
Solution Approach 2:
The system uses an intermediary data transmission mechanism where quality values are communicated from the spinning machine to the winding machine through a communication interface. This intermediary approach allows quality information to be shared without requiring direct physical integration of complex monitoring systems, thus improving yarn quality while minimizing the increase in overall system complexity
Data Source
AI summary
Automatic operation of a ring spinning system containing a ring spinning machine having spinning positions and a winding machine having winding positions. Yarn is spun at one of the spinning positions and wound up to a cop. Values of a parameter characteristic for the operation of the spinning position are determined during the winding of the cop and stored as spinning data that is assigned to the cop. The spinning data assigned to the cop is taken into account when deciding whether to feed the cop after it has been set down to one of the winding positions. The assignment is based on an identification of a point in time of winding of the cop and an identification of the spinning position at which the cop was wound.