Additive Manufacturing Composite Structures into Existing Components
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Solution Overview
Problem
Existing additive manufacturing technologies face challenges in embedding functional elements, such as continuous fibers with wires or optical tubes, into existing structures, limiting the enhancement of structural strength and functionality.
Innovation Solution
A system and method for additively manufacturing composite structures using a head with a matrix reservoir and nozzle, coupled with a support for multi-dimensional movement, and a controller to guide the discharge of composite material into features of existing components, incorporating cure enhancers to initiate curing of the matrix and reinforcement materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional FDM additive manufacturing is used, then three-dimensional parts can be created by depositing overlapping layers of material, but the structural strength is limited by the properties of the thermoplastic and cannot be significantly enhanced
Solution Approach 1:
The patent applies composite materials by combining continuous fibers (such as carbon fibers, glass fibers, or metal wires) with a matrix material (thermoplastic, resin, or metal powder). This composite structure allows the continuous fibers to carry the primary structural load, providing high strength-to-weight ratio and superior mechanical properties compared to traditional thermoplastic-only FDM printing. The matrix material serves as a binder and protective layer, enabling the fabrication of complex three-dimensional structures with enhanced strength.
2Strength
If continuous fibers are embedded within the structure during fabrication, then the strength of the structure may be multiplied beyond the matrix-dependent strength, but the application of this technology to existing structures is problematic
Solution Approach 1:
The patent segments the manufacturing process into two distinct phases: (1) preparing existing structures with features such as recesses, channels, or mounting areas, and (2) additively manufacturing composite structures with embedded continuous fibers and filling those features. This segmentation allows the technology to be applied to existing structures by first modifying them with appropriate features, then using the additive process to embed functional elements and enhance strength. The guide system detects feature locations and automatically adjusts the print head trajectory to accurately position composite material within existing structures.
Solution Approach 2:
The patent introduces a guide system as an intermediary component that detects the location of features in existing structures and provides real-time positioning information to the print head. This intermediary enables precise alignment between the additive manufacturing process and the existing structure's features, making the technology adaptable to various existing components without requiring manual intervention or complex manual positioning procedures.
3Adaptability or versatility
If functional elements such as wires and optical tubes are embedded into structures, then expanded functionality is achieved, but the process becomes more complex when applied to existing structures
Solution Approach 1:
The patent merges multiple functions into a single additive manufacturing process. The same composite material deposition process that enhances structural strength also embeds functional elements such as electrical wires, optical tubes, and sensors within the structure. The continuous fibers serve dual purposes: providing structural reinforcement and acting as conduits for functional elements. This merging eliminates the need for separate processes to embed functional components, reducing overall process complexity while achieving expanded functionality.
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
Enables the embedding of functional elements into existing structures, enhancing their strength and functionality by multiplying the structural strength and allowing for the creation of complex, three-dimensional shapes with increased unsupported lengths.
Implementation Method 1
a cure enhancer configured to expose composite material discharging from the nozzle to a cure energy
Data Source
AI summary
A system is disclosed for additively manufacturing a composite structure. The system may include a head having a matrix reservoir, a nozzle fluidly connected to the matrix reservoir and configured to discharge a composite material into a feature of an existing component. a guide configured to detect a location of the feature, and a cure enhancer configured to expose composite material discharging from the nozzle to a cure energy. The system may also include a support configured to move the head in multiple dimensions, and a controller in communication with the cure enhancer and the support. The controller may be configured to cause the support to move the head during discharge of the composite material into the feature based on the detected location of the feature.