Baseplate Anchor Channels for Stereolithography Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In stereolithography 3D printing, existing technologies face challenges in securely anchoring and removing complex structures due to inadequate adhesion between the base plate and the cured resin layers, limiting the size and complexity of objects that can be fabricated.
Innovation Solution
The introduction of a base plate with anchor channels that extend into the build surface, featuring a narrow width closer to the surface and a broader width deeper within, which are filled with resin and cured to create resin anchors that securely adhere to the base plate, allowing for the formation and removal of complex structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional base plates are used in stereolithography, then the fabrication process is simple, but the adhesion between resin layers and base plate is insufficient
Solution Approach 1:
The base plate is segmented by incorporating separate anchor channels that extend into the build surface, creating distinct anchoring zones that provide enhanced adhesion without requiring complete redesign of the entire base plate structure
Solution Approach 2:
The anchor channels extend vertically into the build surface from the base plate, adding a depth dimension to the anchoring mechanism. This vertical extension creates mechanical interlocking that significantly enhances adhesion strength beyond simple surface contact
2Stability of the object's composition
If larger and more complex objects are fabricated, then the structural integrity improves, but the adhesion between base plate and resin layers becomes insufficient
Solution Approach 1:
The anchor channels are pre-formed in the base plate before fabrication begins, and resin is infused into these channels during the first layer curing process. This preliminary anchoring action ensures that even large and complex objects have strong adhesion from the very first layer, enabling subsequent layers to build upon a stable foundation
Solution Approach 2:
The anchor channels are strategically positioned at specific locations on the base plate where enhanced adhesion is needed. This localized approach provides targeted reinforcement for complex structures without requiring uniform enhancement across the entire base plate surface
3Reliability
If anchor channels with narrow width near surface and broad width deeper are used, then resin anchors are securely retained, but the fabrication process becomes more complex
Solution Approach 1:
The anchor channels feature an asymmetric cross-sectional geometry where the width varies with depth - narrow at the surface and broader deeper within the base plate. This asymmetric design creates a mechanical interference fit that securely retains resin anchors while preventing their extraction, as the broader lower portion locks the resin in place
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 solution enhances the adhesion of the resin layers to the base plate, enabling the creation of larger and more complex objects with improved structural integrity and reduced need for support structures, facilitating smoother surface finishes and faster fabrication.
Implementation Method 1
Each layer is formed by exposing a photo-reactive resin to an ultraviolet (UV) light source that cures the resin
Implementation Method 2
an object formed on the build surface remains anchored during fabrication via adhesion to the resin anchors
Data Source
AI summary
An example fabrication system includes a light source, a resin container, and a base plate on which resin is cured using the light source so as to build up an object one layer at a time. The disclosed base plate includes a build surface and an anchor channel that extends into the base plate from the build surface. The anchor channel is a recess in the base plate configured to have a narrow width that is closer to an opening to the build surface than a broad width. The base plate can also have a light source that emits light into the anchor channel to cure resin within the anchor channel. Resin anchors cured within the anchor channel to conform to the anchor channel resist being extracted, and an object formed on the build surface remains anchored during fabrication via adhesion to the resin anchors.