Yarn Winding Machine Package Rotation Control for Catching
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Solution Overview
Problem
Conventional yarn winding machines face operational rate reductions due to unsuccessful catching of yarn ends, often resulting in stopped operations and waste when the catching section fails to catch the yarn end or sucks the middle part of the spun yarn.
Innovation Solution
A yarn winding machine equipped with a bobbin holding section, yarn information detecting section, package driving section, and control section that stops the package rotation to position the yarn end near the catching section, allowing for precise control of the catching range and preventing the catching section from sucking the middle part of the spun yarn.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the catching section continuously sucks air to catch yarn ends, then the catching operation can be performed, but the operation rate decreases when catching fails or middle part suction occurs
Solution Approach 1:
The control section performs preliminary action by stopping the package rotation before the catching section attempts to catch the yarn end. This preliminary stop positions the yarn end precisely within the catching range, ensuring successful catching and preventing operation interruptions
Solution Approach 2:
The system uses feedback from the yarn information detecting section to control the package driving section. When yarn discontinuation is detected, the control section receives feedback and automatically adjusts the package rotation speed to stop at the optimal position for catching, creating a closed-loop control system
2Ease of operation
If the catching section sucks air to catch yarn ends, then yarn ends can be caught, but the middle part of spun yarn may be sucked causing waste
Solution Approach 1:
The control section performs preliminary action by stopping the package rotation before the catching section attempts to catch the yarn end. This preliminary stop positions the yarn end precisely within the catching range, ensuring successful catching and preventing operation interruptions
Solution Approach 2:
The system applies local quality control by creating a specific catching range through precise package positioning. The catching section only operates within this controlled range, ensuring that only the yarn end is caught while the middle part of the spun yarn remains unaffected and is not sucked
3Productivity
If the package rotates continuously during winding, then winding operation can be maintained, but yarn end positioning for catching becomes difficult
Solution Approach 1:
The system applies dynamics by allowing the package rotation speed to be dynamically adjusted. The control section can change the rotation speed from normal winding speed to a stopped state at any time, enabling precise yarn end positioning while maintaining continuous winding capability during normal operation
Solution Approach 2:
The package driving section performs periodic action by temporarily stopping rotation during the catching operation. This periodic stop allows the yarn end to be positioned and caught, then the package resumes rotation for continuous winding, creating a rhythmic cycle of winding-stopping-catching
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 machine effectively increases the likelihood of catching the yarn end by stopping the package rotation to align the yarn end within a controlled catching range, enhancing operational efficiency and reducing waste.
Implementation Method 1
The catching section 8c catches a yarn end YEc by sucking air
Data Source
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AI summary
A yarn winding machine (100) includes a bobbin holding section (71) adapted to rotatably hold a bobbin (TB), a yarn information detecting section (5) adapted to detect continuation or discontinuation of a spun yarn (Y) to be wound into the bobbin (TB), a package driving section (73) adapted to rotate the bobbin (TB) or a package (P) formed on the bobbin (TB), and a control section (10) adapted to control the package driving section (73) in accordance with a detection signal from the yarn information detecting section (5). When the yarn information detecting section (5) detects discontinuation of the spun yarn (Y), the control section (10) controls the package driving section (73) to stop rotation of the bobbin (TB) to stop a yarn end (YE) of the spun yarn (Y) at a prescribed position.