Additive Manufacturing Print Head for Precise Fiber Placement
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Solution Overview
Problem
Existing print heads for continuous fiber 3D printing lack accuracy in placement, cutting, compaction, and/or curing, which are essential for optimal performance in additive manufacturing.
Innovation Solution
A print head system with an outlet for material discharge and a compactor downstream to transversely press the material against an adjacent surface, combined with a mechanism for translating the outlet relative to the compacting module, ensuring precise placement, cutting, and curing of composite structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a print head is used for continuous fiber 3D printing, then continuous fibers can be embedded within the matrix structure, but accuracy in placement, cutting, compaction, and curing is insufficient
Solution Approach 1:
The print head is divided into functionally independent modules: a print head module for material discharge, a compaction module with rollers for compressing the deposited material, and a cutting module with a blade for severing continuous fibers. Each module can be independently controlled and optimized, allowing high precision in placement, compaction, and cutting without requiring the entire system to be overly complex.
Solution Approach 2:
The print head module is made movable relative to the compaction and cutting modules, allowing dynamic adjustment of positions and trajectories. This enables precise control over material discharge location, compaction timing, and cutting points, significantly improving manufacturing precision while maintaining manageable system complexity through controlled motion rather than fixed complex mechanisms.
2Manufacturing precision
If a print head is used for continuous fiber 3D printing, then continuous fibers can be embedded within the matrix structure, but accuracy in placement, cutting, compaction, and curing is insufficient
Solution Approach 1:
The cutting function is separated into an independent cutting module with a blade positioned downstream of the print head. This modular approach allows the cutting mechanism to be optimized for precision without adding complexity to the print head itself. The cutting module can be independently controlled to achieve accurate fiber severing at predetermined locations.
Solution Approach 2:
The continuous fiber is tensioned and guided through the system before reaching the cutting point, ensuring proper alignment and positioning. The compaction module also acts preliminarily by compressing the material before cutting, which stabilizes the fiber-matrix composite for more accurate cutting. These preliminary actions improve cutting accuracy without requiring the cutting mechanism itself to be overly complex.
3Manufacturing precision
If a print head is used for continuous fiber 3D printing, then continuous fibers can be embedded within the matrix structure, but accuracy in placement, cutting, compaction, and curing is insufficient
Solution Approach 1:
The compaction function is separated into an independent compaction module with rollers positioned downstream of the print head. This modular design allows the compaction mechanism to be optimized for precision compression without adding complexity to the print head. The rollers can be independently controlled to apply precise compaction forces at specific locations along the deposited material.
Data Source
AI summary
A system is disclosed for additively manufacturing a composite structure. The system may include a support, and a print head operatively connected to and moveable by the support. The print head may include an outlet configured to discharge a material in a trajectory along a central axis of the outlet, and a compactor disposed downstream of the outlet relative to the trajectory and configured to press the material transversely against an adjacent surface. The outlet may be configured to translate relative to the compacting module.