Yarn Winding Machine Downstream Guide Rail Retraction Surface
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Solution Overview
Problem
In existing yarn winding machines, the inclination of the traverse yarn guide device reduces the degree of freedom in positioning the bobbin holder during yarn threading, leading to potential yarn breakage due to contact with the guide device.
Innovation Solution
A yarn winding machine configuration featuring a traverse device with an upstream and downstream guide rail, where the downstream guide rail includes a retraction surface that allows the bobbin holder to be positioned closer to the traverse device, reducing the risk of yarn breakage by spacing the yarn further from the contact roller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the traverse yarn guide device is inclined to match the inclined yarn path, then the yarn path alignment is improved, but the traverse yarn guide device protrudes greatly in the horizontal direction causing yarn breakage risk
Solution Approach 1:
The patent transitions from a 2D inclined traverse guide configuration to a 3D spatial arrangement by introducing a vertically extending downstream guide rail with a retraction surface. This allows the yarn path to clear the traverse guide device horizontally while maintaining proper alignment through vertical positioning, effectively resolving the conflict between alignment precision and yarn breakage risk.
2Manufacturing precision
If the traverse yarn guide device is inclined, then the yarn path follows the inclination, but the degree of freedom in positioning the bobbin holder is decreased
Solution Approach 1:
By introducing the vertical dimension through the downstream guide rail's retraction surface, the system allows horizontal positioning freedom for the bobbin holder while maintaining yarn path alignment through the vertically extended guide structure. The retraction surface provides a clearance zone that decouples horizontal positioning constraints from alignment requirements.
3Reliability
If the bobbin holder is positioned closer to the traverse device, then the yarn can be spaced apart from the contact roller, but the yarn path inclination creates contact risk with the guide rail
Solution Approach 1:
The downstream guide rail is segmented into different functional surfaces: a vertical facing surface for normal operation and an inclined retraction surface for yarn clearance. This segmentation allows the guide rail to provide both structural support and yarn path management functions, preventing contact while enabling close bobbin holder positioning.
Solution Approach 2:
The retraction surface acts as an intermediary element between the yarn path and the downstream guide rail structure. It provides a gradual transition surface that guides the yarn away from potential contact zones, mediating the interaction between the inclined yarn path and the vertical guide rail structure.
Data Source
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AI summary
To provide a yarn winding machine 1 including a contact roller 31 and a traverse device 21. The contact roller 31 rotates in contact with a package 92. The traverse device 21 includes a traverse guide, an upstream guide rail, and a downstream guide rail. The traverse guide contacts a yarn 91 extending from a yarn feed roller 100 to the contact roller 31 to traverse the yarn 91. The upstream guide rail and downstream guide rail allow movement of the traverse guide in a winding width direction and restrict movement of the traverse guide toward an upstream side or a downstream side of a yarn path. The downstream guide rail has a downstream facing surface facing the yarn path, and the downstream facing surface includes a retraction surface progressively separated from the yarn path toward the downstream of the yarn path, as viewed in an axial direction of the package 92.