Twisting Machine Thread Tension Control via Variable Entry-Exit Distance
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Solution Overview
Problem
Current twisting and spinning machines face challenges in maintaining constant thread tension during the spinning process, which limits operating speed and productivity due to variations in thread winding diameter on the bobbin, and there is no existing technology to dynamically adjust the distance between the thread entry and exit points to counteract these variations.
Innovation Solution
A process that dynamically adjusts the distance between the thread entry and exit points through relative movements of the rocker and thread guide, using mechanical or electrical means, to maintain constant thread tension by counteracting changes in the thread winding diameter, achieved through mathematical calculations and software-based optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the distance LB between entry point and exit point is kept constant, then the machine structure is simple, but the thread tension varies during the spinning cycle limiting maximum speed
Solution Approach 1:
The patent applies the dynamics principle by making the distance LB between the entry point and exit point variable rather than constant. The system dynamically adjusts LB during the spinning cycle to compensate for changes in winding diameter, thereby maintaining constant thread tension and enabling higher operating speeds without thread breakage.
Solution Approach 2:
The patent changes the geometric parameter LB (distance between entry and exit points) as a function of the winding diameter. By continuously adjusting this parameter during the spinning cycle, the system compensates for tension variations caused by changing bobbin geometry, thus maintaining optimal tension for high-speed operation.
2Force
If multiple balloons are used to offset working tension, then the thread tension is reduced for the same working speed, but the machine complexity increases
Solution Approach 1:
Instead of adding multiple balloons to reduce tension, the patent changes the geometric parameter LB to maintain constant tension. This approach achieves the same goal of optimizing tension conditions without increasing machine complexity, as it uses a single balloon with variable geometry rather than multiple balloons.
3Productivity
If the thread winding diameter on the bobbin varies during filling, then the thread tension varies unavoidably, but the productivity is limited
Solution Approach 1:
The system performs preliminary anti-action by anticipating the tension variations that will occur due to changing winding diameter. It proactively adjusts the distance LB in advance to counteract these variations, thereby maintaining constant tension and enabling continuous high-speed operation without thread breakage, thus improving productivity.
Solution Approach 2:
The patent implements a feedback mechanism where the system monitors the winding diameter changes and automatically adjusts the distance LB accordingly. This closed-loop control ensures that thread tension remains constant despite variations in bobbin filling stage, allowing sustained high-speed spinning and improved productivity.
Data Source
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AI summary
Process to set the optimal working height between the thread entry point and the thread exit point in a twisting and/or thread spinning machine, and a twisting and/or thread spinning machine that applies such process, comprising: identifying the variation of tension of the thread produced by the variation of the winding diameter (d) of the thread (8) on the bobbin (5), depending on the position of the rocker (6), or the winding diameter of the thread on the bobbin (5); carrying out the displacements from the thread entry point (PE) and/or from the thread exit point (PS) to obtain a distance (LB) between both in which the variations of tension counter each other.