Ion Beam Bragg Peak Curing for Opaque Resin 3D Printing
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Solution Overview
Problem
Current three-dimensional printing technologies are inherently slow and inefficient, particularly when dealing with deeper layers of opaque materials, as they rely on UV radiation which is limited by oxygen inhibition and cannot easily incorporate solid fillers or reinforcing fibers, restricting design flexibility and manufacturing speed.
Innovation Solution
The use of ion beam technology to initiate polymerization at specific, controllable 'Bragg peak' locations within a resin, allowing for simultaneous curing of multiple points and the incorporation of reinforcing materials, enabling faster and more flexible three-dimensional manufacturing without the need for sequential layering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If UV radiation is used to cure polymer resins in three-dimensional printing, then the surface layers can be cured effectively, but the curing depth is limited and cannot penetrate deeper layers of opaque materials
Solution Approach 1:
The patent uses electron beams as an intermediary energy source to initiate polymerization deep within opaque resins, bypassing the limitation of UV radiation which cannot penetrate deep layers. The electron beam acts as a mediator that can deliver energy to deep zones without being blocked by oxygen or material opacity, thereby enabling curing at depths unreachable by conventional UV methods.
Solution Approach 2:
The patent changes the fundamental parameter of energy delivery from electromagnetic radiation (UV) to particle radiation (electron beam). This parameter change allows the energy source to penetrate deep into opaque materials and overcome oxygen inhibition, as electron beams interact differently with matter compared to photons, enabling effective curing at depths of several millimeters to centimeters.
2Manufacturing precision
If three-dimensional printing builds parts layer-by-layer sequentially, then each layer can be precisely formed, but the manufacturing speed is inherently slow
Solution Approach 1:
The patent transitions from sequential layer-by-layer construction (one-dimensional progression) to simultaneous three-dimensional construction throughout the entire resin volume. By using electron beam scanning capabilities that can access any (x, y, z) coordinate directly, the system builds parts in parallel across all dimensions, eliminating the sequential bottleneck while maintaining precision through controlled beam positioning.
Solution Approach 2:
The patent performs preliminary positioning of reinforcing materials and fillers within the resin before initiating polymerization. This preliminary arrangement allows the final curing process to encapsulate pre-positioned components in their correct spatial configurations, enabling complex internal structures to be formed without sequential layering operations.
3Ease of manufacture
If traditional three-dimensional printing uses UV curing, then the process is well-established, but it cannot incorporate solid fillers or reinforcing fibers effectively
Solution Approach 1:
The patent changes the curing mechanism from UV photochemical reaction to electron beam-induced polymerization. This parameter change enables the resin system to accommodate solid fillers and reinforcing fibers that would interfere with UV transmission, as electron beams penetrate materials differently and can initiate polymerization in the presence of various particulate matter, expanding material versatility.
4Productivity
If ion beam technology is used to initiate polymerization at Bragg peak locations, then manufacturing speed and flexibility are enhanced, but the equipment complexity increases
Solution Approach 1:
The patent leverages the universality of electron beam technology, which is already established in other industries such as semiconductor manufacturing and materials processing. By adapting existing electron beam equipment for three-dimensional manufacturing, the system achieves high productivity without requiring entirely new equipment, thereby reducing complexity while maintaining enhanced manufacturing capabilities.
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 significantly enhances manufacturing speed and flexibility, allowing for the creation of complex parts with integrated reinforcing materials, overcoming the limitations of traditional UV-curing techniques and enabling the production of high-quality products cost-competitively with traditional methods.
Implementation Method 1
this invention uses the unique properties of ion beams to deposit most of their energy at a position known as the 'Bragg peak,' to initiate polymerization in a small selected volume of space
Implementation Method 2
The Bragg peak, for an individual particle or stream of particles can be viewed as a three-dimensional pixel of high energy. This energy causes local heating and formation of free radicals and ions.
Implementation Method 3
The chemical curing mechanism of UV-curing and Bragg-peak-curing is virtually the same; the difference is how the energy is delivered
Data Source
AI summary
This patent application claims the use of directed energy in the form of electronically scanned ion beams to form plastic parts by selectively curing commodity or engineering resin in the shape of the part. Polymerization is limited to the vicinity of the controlled Bragg-peak of the ion beam (i.e., where linear energy transfer is maximized), if necessary, by the use of chemical polymerization inhibitors or conditions that inhibit polymerization.