Independent Line Roller Pairs for Thread Winding Tension Control
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Solution Overview
Problem
Current thread winding systems face issues with maintaining continuous tension and minimizing friction during the laying of strands, leading to defects such as undulations and premature breakage, especially when using one-piece rollers that cause uneven strand distances and geometry distortions.
Innovation Solution
The laying head employs independent pairs of line rollers with upstream and downstream rollers, each pair associated with a release roller, allowing for rotational decoupling and independent movement of strands to prevent undulations and ensure optimal sheet laying over a mandrel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If one-piece rollers are used to guide strands, then the structure is simple, but the strands experience uneven distances and friction causing undulations and geometry distortions
Solution Approach 1:
The patent divides the roller system into multiple independent rollers (first roller, second roller, third roller, fourth roller) instead of using one-piece rollers. Each roller can rotate independently, allowing precise control over strand guidance and eliminating the undulations and geometry distortions caused by friction in one-piece rollers. This segmentation of the roller structure directly resolves the contradiction between structural simplicity and manufacturing precision.
2Manufacturing precision
If strands are guided through multiple rollers, then strand guidance is improved, but friction increases causing premature breakage
Solution Approach 1:
The patent employs rollers that can rotate independently (dynamic operation) rather than fixed one-piece rollers. The first and second rollers are mounted on first and second supports respectively, allowing them to rotate independently to guide strands. This dynamic capability reduces friction and prevents strand breakage while maintaining precise guidance, resolving the contradiction between guidance precision and strand reliability.
3Force
If tension is applied to strands, then continuous tension is maintained, but friction from rollers causes energy loss
Solution Approach 1:
The patent replaces the traditional mechanical roller guidance system with a system that uses independent rotating rollers mounted on supports. This substitution allows for reduced friction contact between strands and rollers, minimizing energy loss while maintaining the necessary tension control. The independent rotation capability of each roller reduces mechanical friction compared to one-piece roller systems.
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
This solution ensures each strand is moved independently, maintaining continuous tension and minimizing friction, thereby reducing defects like undulations and enhancing the mechanical strength of the final composite part.
Implementation Method 1
a plurality of pairs of line rollers for rolling the strands from the bobbins
Implementation Method 2
minimizing friction during the laying of strands
Data Source
AI summary
A depositing head for a plurality of rovings each coming from a bobbin and having a longitudinal axis, the depositing head including a plurality of line roller pairs for rolling the rovings from the bobbins, each roller pair being intended to be associated, in operation, with only a given single roving and including an upstream roller and a downstream roller relative to the direction of unwinding of the rovings, the rollers rotating independently of one another.