Continuous Fiber 3D Printing with Tension Vector Control
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Solution Overview
Problem
Current additive manufacturing technologies face challenges in controlling the arrangement and tension of continuous fibers within structures, which affects the strength and stability of the final products, particularly in creating complex shapes and unsupported structures.
Innovation Solution
A system and method that utilize an additive manufacturing machine controlled by a processor to determine and generate tension vectors within structures by arranging continuous fibers through sequentially executable tool paths, allowing for the creation of residual tension in fibers during the manufacturing process, enhancing the structural integrity and stability of the final product.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional FDM additive manufacturing is used to create structures, then the manufacturing process is simple and straightforward, but the strength and stiffness of the resulting structures are insufficient due to lack of fiber reinforcement
Solution Approach 1:
The patent combines continuous fibers with thermoplastic matrix materials to create composite structures. The fiber reinforcement significantly enhances the strength and stiffness of the manufactured parts while maintaining the additive manufacturing process benefits. This composite approach directly addresses the strength limitation of traditional FDM while introducing controlled material complexity.
2Strength
If continuous fibers are embedded within material discharging from the print head, then the strength of the structure is multiplied beyond matrix-dependent strength, but the control of fiber arrangement and tension becomes difficult
Solution Approach 1:
The patent introduces dynamic tension control during the fiber laying process. By actively adjusting and maintaining fiber tension as fibers are deposited and cured, the system achieves precise control over fiber arrangement and orientation. This dynamic control mechanism ensures fibers are properly aligned and tensioned to maximize structural strength while maintaining manufacturing precision.
Solution Approach 2:
The system incorporates feedback mechanisms to monitor and control fiber tension and arrangement during manufacturing. Sensors and control algorithms work together to detect fiber position and tension levels, then adjust processing parameters in real-time to maintain optimal fiber configuration, thereby achieving both high strength and precise control.
3Shape
If continuous fibers are used to create unsupported structures in free space, then complex shapes can be fabricated, but the stability and control of fiber tension during manufacturing is challenging
Solution Approach 1:
The patent applies preliminary curing to sections of fibers as they are laid in free space. By partially or fully curing fibers before they are fully supported by the structure, the system maintains fiber stability and tension control during the manufacturing of complex unsupported geometries. This preliminary action prevents fiber displacement and maintains compositional stability.
Solution Approach 2:
The system utilizes the phase transition of the thermoplastic matrix from molten to solid state during curing to stabilize fiber arrangement. As the matrix cures, it locks fibers in their intended positions and maintains tension, enabling the fabrication of complex unsupported structures with stable fiber composition throughout the manufacturing process.
Data Source
AI summary
A system is disclosed for use in additively manufacturing a structure. The system may include an additive manufacturing machine, a memory having computer-executable instructions stored thereon, and a processor. The processor may be configured to execute the computer-executable instructions to determine a plurality of tension vectors to be generated within the structure, and to generate a plan for manufacturing the structure. The plan may include tool paths that arrange continuous fibers within the structure to generate the plurality of tension vectors. The processor may also be configured to execute the computer-executable instructions to cause the additive manufacturing machine to follow the plan and manufacture the structure.