Spinning Cop Compression Zone for High-Speed Rewinding
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Solution Overview
Problem
Ring spinning machines produce spinning cops with increasing yarn tension during rewinding, leading to yarn breakage and reduced winding speeds, which negatively impact the efficiency of subsequent winding processes.
Innovation Solution
A method where the ring spinning machine optimizes the position and size of spinning cops based on data from the winding machine's control device, adjusting the spinning program to maintain constant yarn tension and prevent problem zones during unwinding, allowing for high-speed rewinding without yarn breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If winding is carried out at high speed, then productivity is improved, but yarn tension increases leading to yarn breakage
Solution Approach 1:
The patent applies preliminary action by pre-forming a compression zone in the spinning cop during the spinning process. This compression zone is created by applying radial compression force to the yarn bundle, densifying it before the winding process. This preliminary structuring ensures that when the cop is later unwound at high speed, the yarn tension remains controlled and constant, preventing breakage while maintaining high productivity.
Solution Approach 2:
The patent changes the physical parameters of the spinning cop by creating a compression zone with different density and structural properties than the rest of the cop. The compression zone has higher density and different mechanical properties, which allows it to control yarn tension during unwinding. This parameter change enables high-speed winding without yarn breakage by stabilizing the tension forces.
2Reliability
If thread tensioners are fully open to release tension, then yarn breakage is prevented, but winding speed must be reduced
Solution Approach 1:
The compression zone is formed in advance during spinning, creating a structured core that naturally regulates tension during unwinding. This preliminary structuring eliminates the need to fully open thread tensioners during winding, as the compression zone itself provides tension control, allowing high-speed operation without yarn breakage.
Solution Approach 2:
The patent extracts the tension control function from the thread tensioners and relocates it to the compression zone within the spinning cop. The compression zone becomes the primary mechanism for tension regulation, allowing the thread tensioners to remain partially closed while still preventing yarn breakage, thus maintaining high winding speeds.
3Reliability
If winding speed is reduced to control yarn tension, then yarn breakage is prevented, but productivity decreases
Solution Approach 1:
The compression zone is created during the spinning process before winding begins. This preliminary compression structuring ensures that when unwinding occurs, the yarn tension is naturally controlled by the compression zone's mechanical properties, allowing high-speed winding without reducing speed to prevent breakage.
Solution Approach 2:
The compression zone serves itself by using its own structural properties (density, radial compression) to automatically regulate yarn tension during unwinding. This self-regulating mechanism eliminates the need for external tension control systems to reduce winding speed, maintaining high productivity while preventing yarn breakage.
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
The method involves arranging a coil on cops sleeve, producing spinning cops (3) on work station (2) of ring spinning machine and determining location and size of the coil or the spinning cops. The unwinding behavior of the spinning cops is evaluated during rewinding of the spinning cops on work station of a coil machine. The evaluated result is transmitted to the ring spinning machine. The evaluated result is processed from the controlling of the ring spinning machine for optimization of the location and size of the coil. An independent claim is also included for a ring spinning machine for the execution of a manufacturing method.