Plasma Flume Heating for Composite Layup
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Solution Overview
Problem
The existing methods for laying up composite materials, particularly those using thermoplastic resins, face challenges with uneven heating during the layup process, especially on complex curved surfaces, and are cost-prohibitive due to the need for lasers and additional safety features.
Innovation Solution
A method and apparatus that utilize a plasma flume to heat the composite material and substrate during the layup process, facilitated by a compaction roller and a plasma generating device, which improves tack and adhesion between layers, enabling efficient layer-to-layer consolidation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a laser beam is used to heat the fiber tow and underlying layup during fiber placement, then heating can be applied to the composite material, but the heating is not evenly applied across parts having complex curvature and additional safety features increase cost
Solution Approach 1:
The patent replaces the laser heating system with a friction-based heating system where the compaction roller itself generates heat through friction as it presses and moves the fiber tow against the substrate. This substitution eliminates the need for external laser equipment and safety features while providing more uniform heating across complex geometries through direct contact friction.
2Temperature
If a laser beam is used to heat the fiber tow and underlying layup during fiber placement, then heating can be applied to the composite material, but the equipment cost becomes prohibitive due to additional safety features
Solution Approach 1:
The patent replaces the expensive laser heating system with a simple friction-based heating mechanism inherent to the compaction roller operation. This mechanical substitution eliminates costly laser equipment and required safety features, making the heating process economically viable while maintaining effectiveness.
Solution Approach 2:
The compaction roller performs dual functions: it applies mechanical pressure to consolidate the fiber tow and simultaneously generates the necessary heat through friction. This self-service approach eliminates the need for separate heating equipment, reducing overall system cost and complexity.
3Strength
If the fiber tow is pressed onto the underlying layup at a nip using a compaction roller, then layer-to-layer consolidation is achieved, but additional heating is required for thermoplastic resin softening
Solution Approach 1:
The compaction roller generates the necessary heat through friction during its normal operation of pressing fiber tow onto the substrate. This self-heating capability eliminates the need for additional external heating systems, maintaining layer consolidation effectiveness while simplifying the overall device complexity.
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 allows for consistent and efficient heating across complex geometries, reducing treatment times and costs by using a plasma flume to enhance material tack and layup propensities, even with thermoplastic materials, thereby improving the overall composite material layup process.
Implementation Method 1
projecting a plasma flume proximate the nip to heat at least one of the composite material and the substrate
Data Source
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AI summary
A method for laying up a composite material includes steps of (1) depositing the composite material onto a substrate; (2) compacting the composite material with a compaction roller, the compaction roller and the substrate defining a nip; and (3) projecting a plasma flume proximate the nip to heat at least one of the composite material and the substrate.