Yarn Joining Device Shrinkage Suppression Mechanism
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Solution Overview
Problem
Existing yarn joining devices struggle to effectively join elastic yarns, such as Core Spun Yarn (CSY), as they shrink vigorously when cut, leading to difficulties in being sucked into untwisting pipes and resulting in unsuccessful joining.
Innovation Solution
A yarn joining device equipped with a yarn shrinkage suppression mechanism, comprising yarn shrinkage control levers that grip the yarns between the suction vents and the yarn joining nozzle, preventing shrinkage and ensuring the yarn ends are properly sucked into the untwisting pipes for successful joining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a yarn joining device uses suction vents to suck yarn ends into untwisting pipes, then non-elastic yarns can be joined successfully, but elastic yarns shrink vigorously when cut and pass by the suction vents without being sucked in
Solution Approach 1:
A yarn shrinkage suppression mechanism is introduced as an intermediary component between the cutter and the suction vent. This mechanism includes a suppressor that contacts the yarn and prevents it from shrinking when the cutter cuts the yarn. The suppressor acts as a mediator that enables the suction vent to effectively capture elastic yarn ends by counteracting their natural shrinkage tendency, thus resolving the contradiction between successful joining of non-elastic yarns and the inability to handle elastic yarns.
Solution Approach 2:
The yarn shrinkage suppression mechanism applies preliminary anti-action by preventing the yarn from shrinking before the suction can occur. When the cutter cuts the yarn, the suppressor is already in position to counteract the shrinkage force, thereby creating conditions favorable for the suction vent to capture the yarn end. This preliminary prevention of the harmful shrinkage action enables the subsequent suction process to work effectively on elastic yarns.
2Reliability
If the yarn shrinkage suppression mechanism is added to prevent shrinkage, then elastic yarns can be joined successfully, but the device complexity increases
Solution Approach 1:
The yarn shrinkage suppression mechanism is merged with the existing yarn joining device structure. The suppressor is integrated into the same assembly as the cutter and suction vent, sharing common mounting structures and control systems. By combining multiple functions (cutting, suppressing shrinkage, and suction) into a unified mechanism, the patent reduces the actual increase in device complexity while maintaining the added capability to handle elastic yarns.
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
The device reliably joins elastic yarns by preventing shrinkage during cutting and pulling out, ensuring accurate positioning and successful yarn joining, thereby increasing the success rate of elastic yarn connections.
Implementation Method 1
a suction vent arranged between the yarn joining nozzle and the cutter in the predetermined direction for sucking a yarn end of the corresponding yarn
Implementation Method 2
a yarn shrinkage suppression mechanism capable of moving so as to contact the yarns between the suction vents and the yarn joining nozzle in the predetermined direction
Data Source
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AI summary
One object is to provide a yarn joining device that can favorably join even elastic yarns. Yarn ends of two yarns (Y1, Y2) held by corresponding clamps (42A, 42B) and cut by corresponding cutters (41A, 41B) are sucked with corresponding untwisting pipes (32A, 32B) each having a suction vent (32a) arranged between a yarn joining nozzle (31) and the cutter (41A, 41B) in an up-down direction. When doing so, the cutters (41A, 41B) are caused to cut the yarns (Y1, Y2) while the yarns (Y1, Y2) are in contact with a yarn shrinkage suppression mechanism (37A, 37B) that can move so as to contact the yarns (Y1, Y2) between the suction vents (32a) and the yarn joining nozzle (31) in the up-down direction.