Yarn Traverse Device Axial Actuation for Bobbin Changeover
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Solution Overview
Problem
Automatic turret type winders face inefficiencies and wastage due to complex mechanisms that require stopping the traverse device during bobbin changeover, leading to reduced speed and economic losses from yarn interference and machine downtime.
Innovation Solution
A yarn transfer system with an actuation device that allows axial movement of the traverse device, enabling yarn transfer to an empty bobbin without stopping the traverse guide, using a cross-spiral shaft and actuation mechanism to maintain normal traverse speed and prevent yarn separation from the guide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex mechanisms are used to transfer yarn during bobbin changeover, then yarn transfer can be achieved, but the traverse device must stop leading to reduced speed and productivity
Solution Approach 1:
The traverse guide is preliminarily positioned in different radial positions before yarn transfer is needed. During normal winding, it operates in the first radial position. When bobbin changeover is detected, it automatically shifts to the second radial position to guide yarn to the empty bobbin, eliminating the need to stop the traverse device
Solution Approach 2:
The traverse guide is made dynamically adjustable between two radial positions through an actuating mechanism. This dynamic repositioning allows the system to adapt its yarn path during operation, enabling seamless transition between winding mode and bobbin changeover mode without stopping
2Reliability
If the traverse device stops during bobbin changeover, then yarn transfer can be controlled, but machine downtime increases causing economic loss
Solution Approach 1:
The traverse device maintains continuous motion throughout the bobbin changeover process. The actuating mechanism ensures the traverse guide smoothly transitions between radial positions while the traverse device keeps moving, eliminating idle time and maintaining continuous productive action
3Reliability
If mechanical systems with traverse guide mechanisms are used, then yarn transfer is possible, but precision setting and consistent re-insertion are required increasing complexity
Solution Approach 1:
The yarn separation and re-insertion functions are extracted from the traverse guide mechanism itself. Instead of the traverse guide needing to precisely separate and re-insert yarn, the system uses the actuated radial positioning to automatically redirect the continuously moving yarn to the empty bobbin, simplifying the traverse guide's requirements
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present invention is a part of a yarn transfer system used for transferring yarn (3) from a full bobbin (9) to an empty bobbin (4) typically fitted on a winder frame. The invention broadly comprises a yarn traverse device (2) used in transferring a continuously arriving yarn (3) onto an empty bobbin (4) for commencing of winding process during bobbin changeover process in automatic turret winder without any stoppage. This is achieved with the provision of an actuation device (5) that facilitates axial movement of the yarn traverse device (2). In the present invention, during the bobbin changeover operation, the yarn traverse device (2) is moved axially through the actuation device (5) and allows the traverse guide (7) -while maintaining its normal traverse speed at all times- to move beyond the normal yarn winding zone (6) such that the advancing yarn (3) is within the reach of the yarn grasping device (14) of the ready-to-be-wound empty bobbin (4). After the yarn transfer is completed, the traverse device moves back to the normal winding zone (6).