Partially Fused Porous Sections for Sub-Micron 3D Filtration
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Solution Overview
Problem
Current 3D fabrication techniques are limited in forming pores with dimensions smaller than a certain minimum size, restricting the ability of screen apparatuses to filter particles beyond a certain size.
Innovation Solution
3D fabrication systems and methods that form screen apparatuses with pores having micron or sub-micron sizes by partially fusing build material particles, using controlled patterns of detailing and fusing agents to prevent full fusion and create predefined porosity levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If current 3D fabrication techniques are used to form pores, then the fabrication process is simple and fast, but the pore dimensions are limited to a minimum size that restricts filtration capability
Solution Approach 1:
The fabrication process is segmented into distinct zones: a first zone where build material particles are fully fused to form solid structures, and a second zone where particles are partially fused to form porous sections with controlled pore dimensions. This segmentation enables precise control over pore size while maintaining manufacturing efficiency.
Solution Approach 2:
Different fusion characteristics are applied to different regions of the build material particles. The first zone receives full fusion treatment for structural integrity, while the second zone receives partial fusion treatment to create porous sections with specific pore dimensions, achieving local quality differentiation.
2Reliability
If build material particles are fully fused, then structural stability is achieved, but porosity is reduced limiting filtration of small particles
Solution Approach 1:
The structure is divided into two functional zones: fully fused regions providing structural stability and partially fused porous sections providing filtration capability. This segmentation allows both structural integrity and small particle filtration to coexist.
Solution Approach 2:
Porous sections are created by partial fusion of build material particles, forming a controlled porous structure with pore dimensions enabling filtration of smaller solid particles while maintaining overall structural stability through the surrounding fully fused material.
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 filtration of smaller solid particles by forming pores with micron or sub-micron sizes, enhancing the filtering capability of screen apparatuses while maintaining structural stability.
Implementation Method 1
a plurality of porous sections (104) formed of partially-fused build material particles (302)... the build material particles (302) in the porous sections (104) may be considered as being partially fused (or equivalently, not fully fused) when, for instance, less than all of the build material particles (302) reach their melting point temperature, melt, and fuse with all of their neighboring particles
Data Source
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AI summary
According to examples, an apparatus may include a plurality of structures formed of fused sections of build material particles and a plurality of porous sections supported by the plurality of structures. The plurality of porous sections may be formed of partially-fused build material particles, in which the partially-fused build material particles may include build material particles that may be partially fused together to cause the plurality of porous sections to have at least a predefined porosity level.