Metal Jetting Composition Modification via Carrier Gas Additives
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Solution Overview
Problem
Current liquid metal jetting additive manufacturing processes lack the ability to efficiently modify the composition of molten metal in situ during the printing process, limiting the quality, cost-effectiveness, and productivity of 3D printed metal parts.
Innovation Solution
The method involves introducing additives to a carrier gas, which are then combined with the molten metal printing material within the ejector nozzle, allowing for instantaneous or near-instantaneous chemical or physical modifications to create modified molten metal droplets with altered compositions, such as alloys, nanocomposites, or composites, that can be deposited onto a substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional liquid metal jetting is used, then the printing process is simple and fast, but the composition of the metal part cannot be modified during printing
Solution Approach 1:
The printing system is segmented into multiple independent additive delivery channels (first additive, second additive, third additive) that can be controlled separately, allowing selective composition modification of different regions or layers without affecting the entire printing process
Solution Approach 2:
Carrier gas is introduced as an intermediary medium to deliver additives to the molten metal printing material. The carrier gas facilitates the transfer of additives from the additive sources to the printing material without directly contacting or contaminating the molten metal
2Manufacturing precision
If in situ modification is implemented, then parts with tailored properties can be created, but the process time increases
Solution Approach 1:
Additives are prepared and delivered in advance through the additive delivery system, allowing the modification process to occur concurrently with the printing process rather than as a separate post-processing step
Solution Approach 2:
The additive delivery system operates continuously during the printing process, maintaining a steady supply of additives to the molten metal without interrupting the printing workflow, ensuring continuous modification without stopping production
3Adaptability or versatility
If multiple additives are introduced, then the composition can be precisely controlled, but the system complexity increases
Solution Approach 1:
Multiple additives are delivered through a unified system architecture where each additive source follows a similar delivery mechanism (carrier gas introduction and mixing), allowing the system to handle different additive types through a standardized multi-functional platform
Solution Approach 2:
Each additive can be delivered to specific regions or layers of the printed part based on local requirements, allowing different zones of the part to have different compositional modifications tailored to their specific functional needs
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 enables the creation of parts with tailored mechanical, thermal, or electrical properties, reducing cycle time and costs by allowing for in situ modifications, such as localized carburization, grain refinement, or the incorporation of nanoparticles, resulting in improved strength, hardness, and ductility.
Implementation Method 1
introducing a carrier gas to a printing material, introducing one or more additives to the carrier gas
Implementation Method 2
allowing the additive to react with the droplet of molten metal printing material to form a modified molten metal printing material
Implementation Method 3
One particular type of 3D printer is a magnetohydrodynamic (MHD) printer, which is suitable for jetting liquid metal layer upon layer
Data Source
AI summary
A method for metal jetting is disclosed. The method for metal jetting includes introducing a first gas into an outer nozzle of an ejector nozzle from a first gas source introducing an additive to the first gas from a second source, combining the additive with the first gas. The method for metal jetting also includes ejecting a droplet of molten metal printing material from the ejector nozzle. The method for metal jetting includes allowing the additive to react with the droplet of molten metal printing material to form a modified molten metal printing material.