3D-Printed Part Tracking with Embedded Magnetic and Spectral Markers
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Solution Overview
Problem
Existing 3D printing technologies face inefficiencies in resolution, scalability, and structural integrity, particularly in stereolithography, with limitations in constructing large, complex geometries and maintaining high resolution without increasing construction time or material usage.
Innovation Solution
Heliolithography employs a rotating build platform with a spiral material deposition and focused actinic radiation to achieve high-resolution, large-scale 3D printing by continuously solidifying materials in a helical fashion, utilizing VCSELs for efficient light sources and magnetic or spectral encoding for part tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If stereolithography is used to achieve high resolution, then manufacturing precision is improved, but productivity deteriorates due to increased construction time
Solution Approach 1:
The patent segments the build process by rotating the build platform to expose different sections of the object to the laser at different times. This allows the laser to focus on small high-resolution sections while the platform rotation enables continuous building, resolving the contradiction between high-resolution processing and overall construction time.
Solution Approach 2:
The build platform is made rotatable rather than stationary, allowing dynamic repositioning during the printing process. This enables the system to maintain high laser focus resolution on small areas while continuously advancing the build through rotation, improving both resolution and productivity.
2Volume of moving object
If stereolithography is used to construct large geometries, then volume of object is improved, but manufacturing precision deteriorates
Solution Approach 1:
The patent divides large objects into multiple sections that are built sequentially as the platform rotates. Each section maintains high resolution through focused laser processing, while the overall large geometry is achieved by combining multiple rotated sections, resolving the contradiction between scale and precision.
Solution Approach 2:
The patent introduces rotational movement as an additional dimension to the traditional layered printing approach. This allows large objects to be constructed by rotating through different angular positions, maintaining consistent laser focus and resolution across the entire large-volume object.
3Adaptability or versatility
If complex geometries are constructed, then adaptability is improved, but device complexity increases
Solution Approach 1:
The rotatable build platform provides a simple dynamic mechanism that enables complex geometries to be constructed through rotational movement combined with selective laser curing. This avoids the need for complex multi-axis mechanical systems while achieving high geometric adaptability.
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 method enables faster, more economical construction of high-resolution, large-scale 3D objects with improved structural integrity and traceability, allowing for secure, encrypted information encoding within the parts.
Implementation Method 1
a radiation source suitable to effectively cure the photopolymer
Implementation Method 2
utilizing VCSELs for efficient light sources
Data Source
AI summary
Set forth are methods for preparing encoded three-dimensional objects. Magnetic particles or particles containing compounds that emit identifiable spectra, or combinations of multiple different magnetic and/or spectral emitting particles are embedded in the 3D object during formation. The particles can be added into the build material before construction, injected in a controlled manner into the 3D object during formation or added to the surface of the object during or after formation. The embedded material allows information regarding when and how the product was manufactured and the materials used to produce the product.