Laser Preforming of Textile Preforms to Prevent Edge Fraying
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Solution Overview
Problem
Textile semi-finished products tend to fray during cutting-to-size, leading to loss of desired arrangement and increased rigidity, which complicates their incorporation into component molds for impregnation and curing.
Innovation Solution
The method involves arranging textile layers with a melt-on binder and using a laser to fix fibers in position along a specific line adjacent to the cut-to-size edge, preventing fraying without excessive rigidity, allowing for complex geometries and automated processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the textile is heated in an oven to fuse individual fibers before cutting, then fraying is prevented, but the textile becomes excessively rigid and difficult to fit into component molds
Solution Approach 1:
The patent applies localized laser irradiation to melt the binder only in specific areas adjacent to the cut edges, rather than heating the entire textile uniformly. This creates locally fused zones that prevent fraying while leaving the rest of the textile flexible and drapable for mold fitting
Solution Approach 2:
The patent replaces the mechanical/thermal oven heating system with a laser-based system. The laser provides precise energy delivery to specific locations, enabling selective binder melting without the excessive rigidity caused by uniform oven heating
2Ease of manufacture
If the melt-on binder is evaporated during heating, then the cutting process is simplified, but fraying control is lost and textile arrangement stability deteriorates
Solution Approach 1:
The patent carefully controls the laser irradiation parameters (power, speed, pulse duration) to melt the binder at specific locations without evaporating it. This maintains the binder's adhesive properties for fraying prevention while achieving clean cuts
3Manufacturing precision
If the textile is cut to size before incorporation into the mold, then the component geometry is precise, but the textile edges become unstable and prone to fraying
Solution Approach 1:
The patent performs preliminary localized binder melting adjacent to the cut edges before the cutting operation. This pre-treatment stabilizes the edges against fraying while allowing the textile to be cut to precise dimensions for component geometry
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 approach effectively prevents fraying, maintains draping capacity, and allows for the production of small, complex preforms with reduced weight and stability issues, enabling precise temperature control and environmental safety during laser irradiation.
Implementation Method 1
the fixing-in-position of the fibers of the textile comprises an irradiation step with a laser beam so that a melt-on binder of the textile is melted on in a localized fashion only
Implementation Method 2
irradiation step with a laser beam so that a melt-on binder of the textile is melted on in a localized fashion only and not evaporated
Data Source
AI summary
A method for preforming a textile semi-finished product, including arranging a textile having at least two layers of fibers, interwoven fibers and/or fiber bundles that are at least in part arranged on top of each other. The method also includes; fixing-in-position of the fibers of the textile against each other and then cutting-to-size of the textile. The fixing-in-position of the textile involves irradiating via a laser beam in order for the melt-on binder of the textile to be melted on only in a localized fashion and not evaporated. The fixing-in-position occurs along a fix-in-position line, the cutting-to-size occurs along a cut-to-size line, and the fix-in-position line is located at a distance relative to the cut-to-size line that is so small that any fraying of the textile is reduced or suppressed altogether.