Flexible Build Surface for Additive Fabrication Part Release
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Solution Overview
Problem
Conventional additive fabrication processes face challenges in efficiently separating parts from the build surface without causing damage, due to high adhesive forces that can lead to injury and part damage during post-processing.
Innovation Solution
A build platform with a flexible metal sheet layer attached to a rigid structure, featuring a removal mechanism that deforms the flexible surface to separate the part from the build platform, and a restorative mechanism to return the build surface to a flat state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rigid build surfaces are used in additive fabrication, then part adhesion during fabrication is ensured, but part removal causes damage and injury due to high adhesive forces
Solution Approach 1:
The build surface is segmented into multiple flexible elements (such as fingers or segments) that can move independently. This segmentation allows controlled deformation during part removal, reducing adhesive force concentration and minimizing part damage while maintaining reliable adhesion during fabrication.
Solution Approach 2:
The build surface transitions from a static rigid structure to a dynamic flexible structure that can adapt its configuration. During fabrication, the flexible build surface maintains stability for proper adhesion; during removal, it deforms dynamically to reduce adhesive forces and prevent damage.
2Reliability
If high adhesive forces are used to ensure part adhesion, then fabrication reliability improves, but part removal becomes dangerous and damaging
Solution Approach 1:
The adhesive force parameter is dynamically changed during the fabrication process. High adhesive forces are maintained during fabrication for reliability, then reduced during removal through flexible deformation, making the operation safe and easy while preserving fabrication reliability.
3Ease of operation
If a flexible build surface is used to facilitate part removal, then part detachment improves, but build surface stability during fabrication may be compromised
Solution Approach 1:
The flexible build surface is divided into segments that provide both flexibility for detachment and stability during fabrication. The segmented structure allows controlled movement during removal while maintaining overall structural integrity and stability during the fabrication process.
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
The solution allows for controlled separation of parts from the build surface, reducing the risk of damage and injury, while maintaining the integrity of the fabrication process.
Implementation Method 1
a flexible layer attached to the rigid structure, wherein some, but not all, portions of the flexible layer are attached to the rigid structure
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2A~2C
AI summary
According to some aspects, an additive fabrication device and a build platform suitable for use within an additive fabrication device are provided. The build platform may include a build surface on which material may be formed by the additive fabrication device when the build platform is installed within the additive fabrication device. According to some embodiments, the build platform may include a flexible build layer and at least one removal mechanism configured to be actuated to apply a force to the flexible build layer. Such actuation may cause the flexible build layer to deform, thereby enabling separation of material adhered to the build surface from the build platform. According to some embodiments, the build platform may comprise a restorative mechanism that acts to return the flexible build layer to a flat state so that subsequent additive fabrication may form material on a flat build surface.