Yarn Winding Device Slack Removal Contact Guide
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Solution Overview
Problem
Existing yarn winding devices fail to prevent yarn stitching at the end portions of the package due to slack in the yarn between the traverse guide and the bobbin, caused by the interval between the traverse guide and the bobbin where yarns run without guidance.
Innovation Solution
A yarn winding device with a slack removal unit that imparts resistance to the yarn when the traverse guide is reversed, using a contact guide between the fulcrum guide and the traverse guide to stabilize the yarn form and prevent slack, along with a position change unit and position control unit to adjust the contact guide's position and a winding control unit to manage bobbin rotation speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traverse guide is used to guide yarn in axial directions of the bobbin, then yarn winding efficiency is improved, but yarn stitching occurs at the end portions due to slack in the yarn between the traverse guide and the bobbin
Solution Approach 1:
A contact guide is introduced as an intermediary component between the traverse guide and the bobbin. This contact guide contacts the yarn and removes slack by imparting resistance to the yarn when the traverse guide is reversed, thereby preventing yarn stitching without interfering with the normal winding operation
Solution Approach 2:
The contact guide is positioned to preemptively remove yarn slack before the traverse guide reverses direction. By applying resistance to the yarn in advance, the system prevents the formation of slack that would otherwise cause yarn stitching at the end portions of the package
2Stability of the object's composition
If the traverse guide is reversed to prevent yarn accumulation, then yarn distribution is improved, but yarn stitching occurs due to slack in the yarn between the traverse guide and the bobbin
Solution Approach 1:
The contact guide serves as a mediator that works in conjunction with the traverse guide reversal mechanism. It contacts the yarn and removes slack during the reversal process, enabling the traverse guide to change direction without causing yarn stitching
Solution Approach 2:
The contact guide performs preliminary action by removing yarn slack before the traverse guide reverses direction. This preliminary removal of slack ensures that when the traverse guide reverses, the yarn is already in a tensioned state, preventing stitching during the reversal process
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 solution effectively removes yarn slack and prevents yarn stitching by increasing tension on the yarn, ensuring a stable yarn form is wound at the edge of the bobbin, thereby reducing yarn stitching occurrences.
Implementation Method 1
a contact guide which is provided between the fulcrum guide and the traverse guide and functions as the resistance imparting unit, wherein the contact guide externally contacts, in the axial directions of the bobbin, the yarn between the fulcrum guide and the traverse guide
Data Source
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AI summary
A yarn winding device forms a wound package 10 by winding a running yarn Y onto a bobbin 9 attached to a bobbin holder, while traversing the yarn Y in traversing directions by the traverse unit 6. This traverse unit 6 has traverse guides 21 which sandwich the running yarn Y and reciprocate in the axial directions of the bobbin holder 5. Between a fulcrum guide 19 of the traverse unit 6 and a traverse guide 21, a yarn stitching restraining guide 50 is provided to contact the yarn Y traversed by the traverse guide 21, when the traverse guide 21 is reversed.