Removable Cleaning Mesh for Debris Capture in Stereolithography
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Solution Overview
Problem
In additive fabrication techniques like stereolithography, debris such as partially cured photopolymer resin often adheres to the container rather than the intended object, interfering with the formation of subsequent layers and requiring inefficient and messy removal methods.
Innovation Solution
A cleaning mesh is fabricated within the additive fabrication device, adhered to the container's interior surface, which captures debris during the photocuring process, allowing for easy removal of the mesh and subsequent debris, thereby preventing interference with object formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If actinic radiation is directed to liquid photopolymer to form solid layers, then layers are cured and adhere to previously cured layers, but debris such as partially cured photopolymer resin adheres to the container instead of the object
Solution Approach 1:
The patent extracts the harmful debris-capturing function from the build platform and assigns it to a separate removable mesh component. The mesh is positioned between the liquid photopolymer and the build platform, selectively capturing debris particles while allowing proper layer adhesion to continue. This separation allows the build platform to focus on object fabrication while the mesh handles debris removal.
Solution Approach 2:
The mesh acts as an intermediary component between the liquid photopolymer and the build platform. It mediates the interaction by providing a surface that preferentially captures debris particles through adhesion while maintaining the functionality of the build platform for object fabrication. The mesh can be easily removed and replaced, preventing debris contamination of the build platform.
2Reliability
If debris adheres to the container, then it interferes with subsequent layer formation, but traditional removal methods are inefficient and messy
Solution Approach 1:
The patent segments the debris-capturing function from the build platform by introducing a separate, removable mesh component. This segmentation allows the mesh to be easily removed and replaced without affecting the build platform or the fabricated object. The mesh can be independently handled, making debris removal simple and clean compared to traditional methods.
Solution Approach 2:
The mesh is designed as a disposable or easily replaceable component that captures debris during the fabrication process. Once the mesh becomes contaminated with debris, it can be quickly removed and discarded or cleaned, while the build platform remains clean and ready for continued use. This approach simplifies the debris removal process significantly.
3Productivity
If a cleaning mesh is introduced to capture debris, then debris removal efficiency improves, but device complexity increases
Solution Approach 1:
The mesh serves multiple functions: it acts as a debris-capturing surface, maintains spacing between the photopolymer and build platform, and can be easily removed for cleaning or replacement. This multi-functionality justifies the added component by providing several benefits simultaneously rather than requiring separate systems for each function.
Solution Approach 2:
The mesh is designed as a simple, inexpensive component that can be easily replaced when contaminated. Rather than investing in complex automated cleaning systems, the patent uses a simple disposable or easily replaceable mesh that captures debris and is then discarded or cleaned manually. This approach improves debris removal efficiency without significantly increasing device complexity.
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 effectively captures and removes debris without obstructing the fabrication process, improving the efficiency and cleanliness of the additive fabrication process by utilizing the debris-capturing properties of the cleaning mesh.
Implementation Method 1
forming a mesh of solid material adhered to an interior surface of the container by directing actinic radiation to the liquid photopolymer in the container
Implementation Method 2
one or more particles of debris within the liquid photopolymer becoming adhered to the mesh of solid material
Data Source
AI summary
According to some aspects, a method is provided of removing debris from a liquid photopolymer in an additive fabrication device. According to some embodiments, a mesh of solid material may be formed in an additive fabrication device from a liquid photopolymer, and particles of debris present in the liquid photopolymer may adhere to the mesh. The debris may thereby be removed from the liquid photopolymer by removing the mesh from the additive fabrication device. The mesh may then be discarded.