Lorentz Force 3D Printing for Fine Metal Detail
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Solution Overview
Problem
Existing 3D printing technologies using molten aluminum result in large drop sizes, leading to porosity, uneven build surfaces, shape inconsistencies, and poor physical properties due to unwelded drops and inability to print fine details.
Innovation Solution
A method involving a printer jetting mechanism with ejector conduits and nozzles that use electrical current and a magnetic field to generate a Lorentz force for ejecting small droplets of conductive print material, allowing for precise control over droplet size and placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If large drop sizes are used for high volume throughput, then productivity is improved, but manufacturing precision deteriorates due to porosity and shape inconsistencies
Solution Approach 1:
The patent changes the physical parameters of droplet ejection by using electromagnetic forces instead of conventional mechanical or pneumatic methods. This enables precise control of droplet size (down to 0.05mm or less) while maintaining high ejection speeds, resolving the contradiction between productivity and manufacturing precision
Solution Approach 2:
The invention replaces mechanical droplet ejection systems with an electromagnetic field-based system. Electrical current flowing through the conductive print material in the presence of a magnetic field generates Lorentz force for controlled ejection, enabling both high throughput and precise droplet size control
2Productivity
If large drop sizes are used for high volume throughput, then productivity is improved, but strength deteriorates due to porosity and unwelded drops
Solution Approach 1:
By changing the ejection mechanism to electromagnetic control, the patent achieves consistent droplet sizes with minimal variation. This eliminates porosity and ensures proper welding between droplets, maintaining high tensile strength while preserving high fabrication speed
Solution Approach 2:
The system incorporates control mechanisms that monitor and adjust ejection parameters in real-time, ensuring consistent droplet formation and placement. This feedback control prevents defects that would compromise strength while maintaining high productivity
3Productivity
If conventional ejection methods are used for high throughput, then productivity is improved, but manufacturing precision deteriorates due to inability to print fine details
Solution Approach 1:
The patent replaces conventional mechanical ejection systems with electromagnetic field-based ejection. This substitution enables precise control of droplet size and placement accuracy, allowing printing of fine details while maintaining high throughput capability
Solution Approach 2:
The invention changes the control parameters from mechanical actuation to electrical current control. This enables independent adjustment of droplet size, velocity, and placement precision, achieving both high productivity and fine detail resolution
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 production of 3D objects with improved tensile strength, reduced porosity, and the ability to print fine details by controlling droplet size and velocity, enhancing the overall quality of printed objects.
Implementation Method 1
flowing electrical current through the print material in the flux region to thereby generate a Lorentz force on the print material and eject at least a portion of the print material from the ejector nozzle
Data Source
AI summary
A method of printing a three-dimensional object. The method comprises: supplying a print material that is electrically conductive to a plurality of ejector conduits arranged in an array, the ejector conduits comprising first ends configured to accept the print material and second ends comprising an ejector nozzle; advancing the print material in one or more of the ejector conduits of the array until the print material is disposed within the ejector nozzle of the one or more ejector conduits; providing a flux region in the print material disposed within the ejector nozzle; flowing electrical current through the print material in the flux region to thereby generate a Lorentz force on the print material and eject at least a portion of the print material from the ejector nozzle onto a print substrate; and repeating both the advancing of the print material and the flowing electrical current through the flux region to form a three-dimensional object on the print substrate.