Composite Patch Stereolithography for Impact-Resistant 3D Parts
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Solution Overview
Problem
SLA printing struggles to produce high-strength, high-impact parts due to inadequate adhesion between cured resin layers and the print substrate.
Innovation Solution
Integrate composite material patches, such as fiberglass or carbon fiber, into the curing process by pre-cutting them to match the object's cross-sections and automatically transferring them onto the resin vessel, enhancing the adhesion and structural integrity of the printed object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If composite material patches are integrated into the curing process, then the structural strength and impact resistance of printed parts is improved, but the device complexity and process difficulty increase
Solution Approach 1:
Composite material patches are pre-cut to match the cross-sectional geometry of the desired object before being placed in the resin vessel. This preliminary preparation ensures that patches are ready for integration at the correct positions and orientations, simplifying the overall process despite the added complexity of patch handling
Solution Approach 2:
A transfer device acts as an intermediary mechanism to automatically place pre-cut composite patches onto the resin surface at specific locations. This intermediary system bridges the gap between patch preparation and integration into the printed structure, managing the complexity of precise patch placement
2Strength
If composite material patches are integrated into the curing process, then the impact resistance of printed parts is improved, but the manufacturing precision requirements increase
Solution Approach 1:
Patches are pre-cut to precisely match the cross-sectional geometry of the object being printed. This preliminary precision work ensures that when patches are placed in the resin, they align correctly with the build plate and cured resin layers, meeting high manufacturing precision requirements
Solution Approach 2:
Manual placement of composite patches is replaced with an automated transfer device that uses mechanical or electromagnetic fields to precisely position patches. This substitution reduces human error and ensures consistent, high-precision placement across all layers
3Reliability
If composite material patches are used to reinforce printed parts, then the adhesion between resin layers is improved, but the ease of manufacture decreases
Solution Approach 1:
Composite patches are prepared in advance with surface treatments or coatings that enhance adhesion to the resin. This preliminary preparation ensures strong bonding between the composite material and cured resin layers, improving reliability while the automation of the process maintains ease of manufacture
Solution Approach 2:
The system is designed to automatically handle patch placement and integration without requiring manual intervention. The transfer device and curing system work together to self-manage the complex steps of patch integration, maintaining ease of manufacture despite the enhanced adhesion requirements
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
Enhances the structural strength and impact resistance of 3D printed objects by integrating composite material patches, improving the mechanical properties of SLA printed parts.
Implementation Method 1
irradiating resin contained inside the vessel with an energy source to at least partially cure a layer of resin integrated with the first composite material patch
Data Source
AI summary
A method for producing a three-dimensional object on an additive fabrication device includes placing a first composite material patch on a bottom of a vessel of the additive fabrication device. The method also includes moving a build plate of the additive fabrication device whereby at least one of the build platform or a layer of at least partially cured resin on the build plate touches the first composite material patch. The method further includes irradiating resin contained inside the vessel with an energy source to at least partially cure a layer of resin integrated with the first composite material patch.