Yarn Winding Machine Suction Opening Standby Position Control
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Solution Overview
Problem
Conventional yarn winding machines often experience defects due to double withdrawal of yarn from the package surface during the winding process, leading to incomplete or damaged packages.
Innovation Solution
A yarn winding machine with a control section that adjusts the suction opening's position, speed, and standby time based on the package diameter and yarn defect length, preventing double withdrawal by maintaining the suction opening further away from the package during standby and using independent motor control for precise operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the suction opening is positioned close to the package to ensure reliable yarn catching, then the yarn end can be caught more reliably, but double withdrawal of yarn from the package surface occurs causing defects
Solution Approach 1:
The suction opening performs a standby operation at a standby region further away from the package before the catching operation. This preliminary positioning allows the package to rotate and present the yarn end to the suction opening without the suction opening being too close, thus preventing double withdrawal while ensuring reliable yarn catching when needed.
Solution Approach 2:
The suction opening dynamically adjusts its position between the standby region (further from package) and catching region (closer to package). The control section controls the moving speed and acceleration based on package diameter and yarn defect length, optimizing the balance between reliable yarn catching and preventing double withdrawal defects.
2Productivity
If the suction opening moves quickly from catching region to standby region to increase productivity, then the operation cycle is shortened, but the yarn may not be properly guided to the target region
Solution Approach 1:
The control section dynamically adjusts the moving speed and acceleration of the suction opening based on the package diameter and yarn defect length. This allows the system to optimize the balance between productivity (faster movement) and manufacturing precision (proper yarn guiding), adapting to different operating conditions.
Solution Approach 2:
The control section uses feedback from sensors that detect package diameter and yarn defect length to adjust the moving speed and acceleration of the suction opening. This feedback mechanism ensures that the yarn is properly guided to the target region while maintaining high productivity.
3Reliability
If the standby time at the standby region is increased to prevent double withdrawal, then double withdrawal defects are reduced, but the overall winding productivity decreases
Solution Approach 1:
The control section dynamically adjusts the standby time based on package diameter and yarn defect length. This allows the system to minimize standby time (maximizing productivity) while still preventing double withdrawal defects (maintaining reliability), adapting to different operating conditions rather than using a fixed conservative standby time.
Solution Approach 2:
The system changes the standby time parameter based on detected package diameter and yarn defect length. By adjusting this parameter dynamically, the system prevents double withdrawal defects while maintaining high winding efficiency, avoiding the need for excessively long fixed standby times.
4Reliability
If the suction opening is positioned further from the package during standby to prevent double withdrawal, then yarn defect prevention is improved, but the distance to catch the yarn end increases
Solution Approach 1:
The suction opening positions itself at the standby region (further from package) as a preliminary action before the catching operation. This preliminary positioning prevents double withdrawal while the package rotates to bring the yarn end within catching distance, effectively resolving the contradiction between distance and defect prevention.
Solution Approach 2:
The suction opening dynamically adjusts its distance from the package by moving between the standby region (further away) and catching region (closer). The control section optimizes the moving speed and acceleration to ensure the yarn end is caught reliably despite the increased initial distance during standby.
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
Prevents yarn defects by ensuring accurate yarn catching and guiding, maintaining the yarn on the package surface from being caught, and allowing for reliable yarn joining and smooth winding resumption.
Implementation Method 1
a suction opening adapted to suck the yarn from the package
Data Source
Figure 1
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AI summary
A winder unit 10 includes a winding unit main body 16 adapted to form a package 30 by winding a yarn 20, an upper-yarn catching member 26 adapted to suck and catch the yarn 20 from the package 30 and to guide the yarn 20, and a unit control section 50 adapted to control the upper-yarn catching member 26 to perform a catching operation at a catching region R1 to suck and catch the yarn 20 from the package 30, a standby operation to be under standby at a standby region R2 that is further away from the package 30 than the catching region R1, and a guiding operation to guide the yarn 20 to a yarn joining region R3, and adapted to adjust the standby operation according to a diameter of the package 30 and/or a length of a defect included in the yarn 20.