Agent Droplet Deposition Density for 3D Printed Porosity Control
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Solution Overview
Problem
Existing 3D printing methods struggle to accurately control the porosity of printed articles, leading to inconsistent fluid flow and filtration capabilities due to unpredictable deposition of agent droplets, which displace build material particles and form pores of varying sizes.
Innovation Solution
A processor determines the optimal density level for agent droplet deposition based on predefined porosity ranges, using correlations and fabrication data to ensure consistent porosity levels in 3D printed articles, enabling controlled porosity and strength through sintering processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If agent droplets are deposited onto build material particles to form pores, then porosity is created for fluid flow and filtration, but the deposition density is unpredictable leading to inconsistent porosity levels
Solution Approach 1:
The patent applies parameter changes by systematically varying droplet deposition density (droplets per square inch) to achieve different porosity levels. The system establishes correlations between specific deposition density parameters and resulting porosity ranges, allowing predictable control of pore formation through parameter optimization rather than random deposition.
Solution Approach 2:
The patent implements feedback mechanisms by measuring actual porosity levels after droplet deposition and using this information to adjust subsequent deposition parameters. The system correlates deposition density with measured porosity outcomes, creating a closed-loop control system that ensures consistent porosity levels across different production batches.
2Productivity
If high porosity is achieved through dense droplet deposition, then fluid flow and filtration capabilities improve, but structural strength decreases
Solution Approach 1:
The patent applies local quality by enabling different porosity levels in different regions of the printed article. By controlling droplet deposition density locally, the system can create zones with high porosity for fluid flow and zones with lower porosity for structural support, allowing simultaneous optimization of both fluid flow efficiency and structural integrity in different parts of the same component.
3Ease of manufacture
If random droplet deposition is used to create pores, then the process is simple, but the pore size and distribution are inconsistent
Solution Approach 1:
The patent applies dynamics by making the droplet deposition process adaptive rather than static. The system dynamically adjusts deposition parameters based on real-time measurements and correlations, transforming a simple random process into a controlled dynamic system that maintains ease of manufacture while achieving consistent pore uniformity through automated parameter adjustment.
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
The method allows for precise control of porosity, enhancing fluid flow and filtration efficiency while maintaining structural integrity, suitable for applications like filters and molded fiber tools.
Implementation Method 1
The deposition of agent droplets onto a layer of build material particles, e.g., powder particles, often causes some of the build material particles upon which the droplets are deposited to be displaced. That is, the ballistic momentum caused by the droplets hitting the build material particles causes some of the build material particles to be moved from their current positions and for pores to be formed between some of the build material particles
Implementation Method 2
enabling controlled porosity and strength through sintering processes
Data Source
AI summary
According to examples, a non-transitory computer-readable medium may have stored thereon instructions that may cause a processor to identify a first porosity level range that a first portion of a layer of build material particles is to have. The processor may also determine a density level at which an agent is to be deposited as droplets onto the first portion of the layer of the build material particles to cause the first portion of the layer to have a porosity that is within the identified first porosity level range. The processor may further store the determined density level, in which an article including the first portion having a porosity level that is within the identified first porosity level range is to be fabricated from the build material particles based on the determined density level.