Winding Package Rotation for Yarn Splicing Reliability
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Solution Overview
Problem
Automatic winders often pull out multiple yarn portions instead of the intended yarn end, leading to defective yarns being wound around the package, as existing methods fail to reliably prevent multi-pullout during the yarn splicing process.
Innovation Solution
The method involves rotating the winding package in the winding direction to position the intake port close to the package, then reversing the rotation to guide the yarn end into the splicing means, ensuring only the yarn end is suctioned and caught, thereby preventing multi-pullout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the winding package is rotated in the opposite direction to pull out the yarn end, then the yarn end can be drawn out for splicing, but slack portions of the yarn may also be suctioned and caught, causing multi-pullout
Solution Approach 1:
The method performs a preliminary rotation of the winding package in the winding direction before the actual yarn pullout operation. This preliminary action positions the yarn end properly and eliminates slack portions, ensuring that only the yarn end is suctioned and caught during the subsequent pullout operation, thereby preventing multi-pullout and improving splicing reliability
Solution Approach 2:
The method employs periodic rotation of the winding package, alternating between the winding direction and the opposite direction. This periodic action allows the yarn to be properly positioned and tensioned during the forward rotation, then pulled out cleanly during the reverse rotation, preventing slack portions from being inadvertently suctioned
2Ease of operation
If the intake port is positioned close to the winding package during suction, then the yarn can be caught, but both yarn end and slack portions may be suctioned simultaneously
Solution Approach 1:
The intake port is positioned close to the winding package in advance, during the preliminary rotation phase, to eliminate slack portions before the actual suction operation. This preliminary positioning ensures that when suction is applied, only the yarn end is available to be caught, not slack portions
Solution Approach 2:
The method creates a localized condition where the yarn end has different properties (tension, position) compared to slack portions. By positioning the intake port close to the package during preliminary rotation, the system creates a local zone where only the yarn end is accessible for suction, while slack portions remain positioned away from the intake port
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
This approach effectively eliminates slack yarn portions and ensures that only the yarn end is drawn out, preventing defective yarns from being wound, thus enhancing the reliability of the yarn splicing process.
Implementation Method 1
a yarn having been cut when being rewound from a yarn supply bobbin onto a winding package is suctioned and caught to be guided into yarn splicing means for yarn splicing
Data Source
Figure 1
Figure 2
Figure 3a~3d
AI summary
The present invention aims to reliably prevent multiple portions of a yarn from being pulled out from a winding package, so as not to wind a defective yarn around the winding package. In an automatic winder, a yarn having been cut when rewound from a yarn supply bobbin 8 onto a winding package 2 is suctioned and caught to be guided into yarn splicing means for yarn splicing. With an intake port 4a for suctioning and catching a yarn Y' on the winding package 2 side being positioned close to the winding package 2, the winding package 2 is rotated in a winding direction 2a, and thereafter in a direction 2b opposite to the winding direction, so that the intake port 4a is moved away from the winding package 2 to guide the yarn Y' on the winding package side into the yarn splicing means.