Binder Agent for 3D Printing Metal Parts
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Solution Overview
Problem
Current inkjet printing technologies face challenges in achieving high-speed, high-quality printing of metal parts with binder agents that effectively bind metal build material particles without causing settling or oxidation of nanoparticles, which affects the binding efficiency and mechanical strength of the final product.
Innovation Solution
The use of binder agents containing copper, stainless steel, or nickel nanoparticles, combined with specific liquid vehicles including antioxidants, polyethylene glycol hexadecyl ether, and other additives, which allow for jettable compositions that sinter or melt at controlled temperatures to form strong metal connections during the 3D printing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If binder agents with metal nanoparticles are used to bind metal build material particles, then binding efficiency and mechanical strength are improved, but nanoparticle settling and oxidation occur which deteriorate binding efficiency
Solution Approach 1:
The patent applies preliminary action by adding antioxidants to the binder agent formulation before the printing process. This prevents oxidation of metal nanoparticles in advance, ensuring they maintain their binding efficiency throughout the printing process. The binder agent is pre-formulated with protective components that stabilize the nanoparticles before they are applied to the metal build material particles.
Solution Approach 2:
The patent uses the binder agent as an intermediary substance that contains both metal nanoparticles and protective components (antioxidants, stabilizers). This intermediary formulation protects the nanoparticles from oxidation and settling while enabling them to bind the metal build material particles effectively. The liquid vehicle acts as a mediator that maintains nanoparticle dispersion and stability throughout the printing process.
2Productivity
If high-speed printing is achieved using fixed printheads and moving substrate web, then productivity is improved, but printing quality and binding uniformity deteriorate
Solution Approach 1:
The patent applies dynamics by formulating the binder agent with controlled viscosity characteristics that allow it to be jetted at high speeds while maintaining consistent droplet formation and placement. The liquid vehicle composition is optimized to provide stable flow properties that accommodate high-speed printing operations without sacrificing printing quality or binding uniformity.
Solution Approach 2:
The patent changes physical parameters of the binder agent, specifically optimizing viscosity, surface tension, and composition ratios to enable high-speed jetting while maintaining printing quality. By adjusting these parameters, the formulation achieves both high productivity through fast printing speeds and high manufacturing precision through uniform binder application and consistent droplet placement.
3Device complexity
If conventional binder agents are used without antioxidants, then formulation simplicity is maintained, but nanoparticle oxidation reduces binding efficiency
Solution Approach 1:
The patent extracts the oxidation problem from the system by adding specific antioxidants to the binder agent formulation. This targeted addition addresses the nanoparticle oxidation issue without fundamentally changing the overall binder agent structure or complexity. The antioxidant component is integrated into the existing formulation framework, maintaining relative simplicity while solving the reliability problem.
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 production of mechanically stronger final metal objects by effectively binding metal build material particles, preventing nanoparticle settling and oxidation, and allowing for reliable jetting and sintering, thereby enhancing the printing process's efficiency and product quality.
Implementation Method 1
heating the layers to a temperature that will sinter or melt the metal nanoparticles without sintering or melting the metal build material particles. The sintered or melted metal nanoparticles form metal connections that bind the metal build material particles together.
Implementation Method 2
heating the layers to a temperature that will sinter or melt the metal nanoparticles without sintering or melting the metal build material particles.
Implementation Method 3
In some examples, the liquid vehicle includes an antioxidant, polyethylene glycol hexadecyl ether, and a balance of water.
Implementation Method 4
In some examples, the liquid vehicle includes an antioxidant, polyethylene glycol hexadecyl ether, and a balance of water.
Data Source
AI summary
Examples of binder agents for a three-dimensional (3D) printing process are disclosed. In an example, the binder agent includes copper nanoparticles and a liquid vehicle. In this example, the liquid vehicle includes an antioxidant, polyethylene glycol hexadecyl ether, and a balance of water. Another example of the binder agent includes stainless steel nanoparticles and a liquid vehicle. In this example, the liquid vehicle includes polyethylene glycol hexadecyl ether, and a balance of water. Still another example of the binder agent includes nickel nanoparticles and a liquid vehicle. The liquid vehicle includes an antioxidant; a symmetric triblock copolymer including poly(ethylene oxide) and poly(propylene oxide), and a balance of water.