Volumetric Additive Manufacturing via 3D Wire Grid
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Solution Overview
Problem
Current additive manufacturing techniques are inherently serial, leading to inefficiencies in build time and mechanical performance due to the layer-by-layer construction of three-dimensional objects, which results in structural anisotropy, microstructural defects, and macroscopic geometric deviations.
Innovation Solution
A method and apparatus that utilize a three-dimensional wire grid to control energy distribution within a build domain, allowing for the simultaneous or staggered creation of volumetric regions by resistive heat dissipation, enabling the direct formation of objects with desired geometry through the activation and deactivation of wires, thereby overcoming the serial nature of traditional methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If layer-by-layer additive manufacturing is used, then three-dimensional objects can be constructed from virtual models, but build time increases significantly and mechanical performance deteriorates due to structural anisotropy and microstructural defects
Solution Approach 1:
The patent transitions from two-dimensional layer-by-layer construction to three-dimensional volumetric manufacturing by embedding a 3D wire grid within the build volume. The wire grid nodes are activated simultaneously or in staggered fashion to generate heat throughout the volume, enabling parallel construction of multiple volumetric regions rather than sequential layer deposition.
Solution Approach 2:
The build volume is segmented into multiple independently controllable volumetric regions defined by the wire grid structure. Each region can be processed simultaneously or in different sequences, allowing parallel manufacturing operations and eliminating the serial constraint of traditional layer-by-layer approaches.
2Adaptability or versatility
If layer-by-layer additive manufacturing is used, then objects can be fabricated with complex geometries, but mechanical performance deteriorates due to structural anisotropy and macroscopic geometric deviations
Solution Approach 1:
By moving from 2D layer deposition to 3D volumetric processing, the system achieves isotropic material properties throughout the entire object volume. The simultaneous activation of wire grid nodes creates uniform thermal and structural characteristics in all spatial directions, eliminating the anisotropy inherent in layer-by-layer methods.
Solution Approach 2:
The wire grid enables localized control of energy distribution at specific nodes and volumetric regions. Each region can be processed with tailored parameters while maintaining overall geometric fidelity, allowing complex geometries to be fabricated with uniform high mechanical properties throughout the entire structure.
3Manufacturing precision
If serial point-by-point construction is used, then precise geometric control is achieved, but build time scales linearly with object size leading to inefficiency
Solution Approach 1:
The object is divided into multiple independently controllable volumetric regions defined by the wire grid. These regions can be constructed in parallel through simultaneous node activation, reducing build time from linear scaling to constant or logarithmic scaling with object size while maintaining precision through independent control of each region.
Solution Approach 2:
Multiple volumetric regions that would traditionally be constructed sequentially are merged into simultaneous parallel operations. The wire grid system enables coordinated activation of multiple nodes at once, combining what were separate serial operations into a single parallel manufacturing step.
4Ease of manufacture
If traditional additive manufacturing is used, then material can be deposited according to tool paths, but support materials are required and process complexity increases
Solution Approach 1:
The patent removes the requirement for support materials by fundamentally changing the manufacturing approach from sequential layer deposition to simultaneous volumetric construction. The wire grid-based system can fabricate overhanging and complex geometries without needing sacrificial support structures, as each volumetric region is constructed in place with material deposited only where needed.
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 significantly enhances build speed and efficiency, reduces build time scaling with object size, and improves mechanical performance by allowing for the creation of objects with enhanced strength-to-weight ratios and tailored properties, while eliminating the need for support materials and simplifying the manufacturing process.
Implementation Method 1
controlling the energy distribution in an ultra-parallelized and/or staggered fashion within or outside the intended object's volume and/or its surface in order to cause some alteration in the state or form of the material
Data Source
AI summary
A method and apparatus for volumetric manufacture of three-dimensional physical objects from a precursor material based on plans, specifications, or virtual models. A build domain is provided comprising an enclosed three-dimensional wire grid in which the wires are connected to one or more electric power sources configured to controllably and addressably apply power to one or more individual wires to cause the wires to dissipate heat produced by Joule heating to the surrounding precursor material situated within the build domain, and to further allow for the control of the three-dimensional heat distribution and accordingly temperature distribution within the build domain. By activating and deactivating one or more predetermined subsets of the wires in the build domain, the precursor can be caused to melt and/or solidify so as to form a three-dimensional object within the build domain.