Multi-Color Volumetric Printing for Isotropic 3D Curing
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Solution Overview
Problem
Volumetric printing methods for three-dimensional objects using multi-color photopolymerization face issues of structural anisotropy, leading to undesired shrinkage and deformation, which compromise geometrical accuracy and structural fidelity.
Innovation Solution
A method involving dual-color photopolymerization with light of different wavelengths intersecting in a formation zone, combined with spatial and temporal variation of printing parameters to control the curing behavior of a photocurable resin, ensuring each volume element receives tailored irradiation based on its position and proximity to cured resin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If volumetric printing is used to print three-dimensional objects quickly, then productivity is improved, but structural anisotropy occurs leading to geometrical inaccuracy
Solution Approach 1:
The patent applies local quality by varying printing parameters (irradiation energy, wavelength, exposure time) based on the spatial position of each volume element within the object. Elements closer to already-cured resin receive different irradiation conditions than those farther away, creating position-dependent curing characteristics that compensate for anisotropic effects and maintain geometrical accuracy throughout the entire printed object.
2Ease of operation
If uniform irradiation is applied to all volume elements, then ease of operation is improved, but structural isotropy deteriorates causing deformation
Solution Approach 1:
The patent implements dynamics by making the irradiation parameters adaptive rather than static. The system dynamically adjusts printing parameters based on real-time information about the curing state and position of each volume element, allowing the irradiation process to respond to changing conditions during printing and achieve structural isotropy without complicating the overall operation.
Solution Approach 2:
The patent employs feedback mechanisms where the curing state of previously irradiated volume elements is used to determine the irradiation parameters for subsequent elements. This feedback loop ensures that each volume element receives appropriate irradiation based on its position relative to already-cured resin, maintaining structural isotropy while keeping the control system manageable through systematic 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
This approach enhances structural isotropy, reduces undesired shrinkage and deformation, and improves geometrical accuracy and structural fidelity of the printed three-dimensional objects.
Implementation Method 1
volumetric printing a three-dimensional object by multi-color photopolymerization of a photocurable resin
Data Source
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AI summary
A method for volumetric printing a three-dimensional object by multi-color photopolymerization of a photocurable resin.