Spun Yarn Take-Up Apparatus Cutter Suctioning Control
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Solution Overview
Problem
Existing spun yarn take-up apparatuses face difficulties in reliably cutting and suctioning yarns, especially during interruptions in winding, due to decreased yarn tension and challenges with thicker yarns.
Innovation Solution
A spun yarn take-up apparatus with a yarn cutting-suctioning unit that includes a cutter and suctioning unit, where the controller maintains roller rotation and moves the cutter and suctioning unit closer to the yarns to ensure reliable cutting and suctioning, even when only one yarn is being cut, and stops the roller only when all yarns are cut, preventing tension decrease.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the suctioning unit is connected with the suction source during winding interruption, then yarns can be suctioned after cutting, but yarn tension decreases making cutting difficult
Solution Approach 1:
The controller performs preliminary action by maintaining roller rotation even after yarn cutting is detected, before the suctioning unit connects with the suction source. This ensures yarn tension is maintained during the entire cutting and suctioning process, preventing the tension decrease that would otherwise make cutting difficult.
Solution Approach 2:
The roller continues rotating without interruption or deceleration throughout the yarn cutting and suctioning process. This continuous rotation maintains constant yarn tension, ensuring reliable cutting while the suctioning unit connects and suctions the cut yarns.
2Difficulty of detecting and measuring
If the roller is stopped immediately when one yarn is cut, then cutting can be detected, but tension of remaining yarns decreases reducing cutting reliability
Solution Approach 1:
The controller continues the roller rotation without stopping or decelerating even after detecting that one or more yarns are cut. This continuous rotation maintains yarn tension for all yarns, ensuring that cutting reliability is not reduced while still enabling cutting detection through the suctioning unit's operation.
Solution Approach 2:
The controller uses feedback from the suctioning unit's operation (detecting when yarns are cut) to determine when to stop the roller, but only after all yarns have been successfully cut and suctioned. This feedback mechanism ensures cutting reliability is maintained throughout the process.
3Reliability
If the cutter and suctioning unit are moved closer to the yarns, then cutting and suctioning effectiveness improves, but device complexity increases
Solution Approach 1:
The cutter and suctioning unit are merged into a single integrated assembly that moves together as one unit. This combining of functions into one movable component achieves the desired closeness to the yarns for effective cutting and suctioning while avoiding the complexity of coordinating multiple separate mechanisms.
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 allows for reliable cutting and suctioning of yarns without tension loss and reduces the risk of cutter breakage, ensuring stable and efficient yarn processing.
Implementation Method 1
a suctioning unit for suctioning a yarn cut by the cutter
Data Source
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AI summary
To provide a spun yarn take-up apparatus capable of cutting a yarn reliably with a yarn cutting-suctioning unit. The spun yarn take-up apparatus includes a yarn cutting-suctioning unit (30) having a cutter (32) for cutting a plurality of yarns (Y) aligned along an alignment direction each traveling and a suctioning unit (35) for suctioning the yarns (Y) cut by the cutter (32), a godet roller arranged downstream from the yarn cutting-suctioning unit (30) in a yarn traveling direction so as to feed the traveling yarns (Y) in the yarn traveling direction, and a controller configured to perform control to stop the godet roller when the yarn (Y) is cut and suctioned by the yarn cutting-suctioning unit (30). The plurality of yarns (Y) and the cutter (32) and suctioning unit (35) are caused to move closer to each other, whereby the plurality of yarns (Y) can be sequentially cut and suctioned. The controller stops the godet roller when at least a plurality of yarns Y (Y) are in a state of being cut.