Oscillating Yarn Guide for Variable Bobbin Winding
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Solution Overview
Problem
Existing yarn laying devices are limited in their ability to handle a wide range of yarns, requiring frequent conversions and resulting in imprecise yarn placement due to high winding speeds and the need for specific thread guides designed for narrow ranges of yarns.
Innovation Solution
A yarn laying device with a yarn guide that can move oscillatingly relative to the bobbin holder, allowing axially offset yarn layers and incorporating an infeed movement to maintain precise winding, enabling use with a variety of yarns without the need for frequent conversions. The device uses a control system to synchronize the oscillating and infeed movements, ensuring constant yarn placement and reducing the need for additional components like springs or weights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a slotted drum thread guide is used for high-speed winding, then winding speed is improved, but the device can only handle a narrow range of yarns requiring frequent conversions
Solution Approach 1:
The patent applies the dynamics principle by making the thread guide movable instead of fixed. The thread guide can oscillate along the longitudinal axis of the bobbin and is positionably adjustable radially, allowing it to adapt to different yarn types and bobbin configurations while maintaining high-speed winding capability. This dynamic positioning eliminates the need for frequent device conversions.
Solution Approach 2:
The patent implements universality by designing a single thread guide mechanism that can handle multiple yarn types and bobbin configurations. The movable thread guide with oscillating capability and radial adjustability serves multiple functions: it can process different yarn diameters, accommodate various bobbin sizes, and work with different winding patterns, replacing the need for multiple specialized slotted drums.
2Device complexity
If the yarn guide is arranged at a distance from the yarn bobbin, then the device structure is simplified, but imprecise yarn placement occurs due to forces on the unguided yarn leg
Solution Approach 1:
The movable thread guide oscillates along the bobbin's longitudinal axis during winding, dynamically adjusting its position to maintain optimal contact with the yarn and bobbin surface. This oscillating motion ensures precise yarn placement while allowing the guide to remain relatively close to the bobbin, balancing structural simplicity with placement precision.
3Manufacturing precision
If a thread guide that rests on the yarn spool with definable pressure is used, then yarn placement precision is improved, but the device requires additional components like springs or weights
Solution Approach 1:
The thread guide is designed with movable components that can oscillate and adjust radially, creating dynamic contact pressure with the yarn and bobbin surface. This dynamic pressure control achieves precise yarn placement without requiring static spring or weight mechanisms, as the motion itself generates the necessary contact forces.
Solution Approach 2:
The patent replaces traditional mechanical pressure application systems (springs, weights) with a motion-based pressure generation system. The oscillating and radially adjustable thread guide uses controlled movement to generate contact pressure, substituting complex mechanical pressure systems with a more elegant motion-controlled approach.
Data Source
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AI summary
The device (10) has a thread guide (32) lying at a yarn bobbin (18) or yarn layers, which is arranged on the bobbin, during a winding process. A yarn is wound on the bobbin in the yarn layers by the guide. The guide is moved to and fro by a changing movement (38) along a yarn bobbin longitudinal axis (22) for forming the yarn layers relative to a yarn bobbin holder (16). A foot plate-side end position (40) of the changing movement of the guide and a conical foot plate (24) of the bobbin are advanced relative to each other along the axis during the winding process. An independent claim is also included for a method for producing a yarn bobbin wound with yarns.