CLIP 3D Printing Electrochemical Dead Zone
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Solution Overview
Problem
Conventional three-dimensional fabrication techniques, particularly 'bottom-up' methods, require mechanical separation steps that can complicate the process, slow down production, and potentially distort the final product due to physical and chemical interactions between the solidified layers and the build plate.
Innovation Solution
The method of continuous liquid interphase printing (CLIP) maintains a dead zone of polymerizable liquid in contact with the build surface and a gradient of polymerization zone between the dead zone and the solid polymer, allowing for continuous formation of three-dimensional objects without the need for mechanical separation, by electrochemically generating a polymerization inhibitor and advancing the carrier away from the build surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If mechanical separation steps are used to separate solidified layers from the build plate, then layer formation can be achieved, but the process becomes complicated and production speed decreases
Solution Approach 1:
The patent replaces mechanical separation systems with an electrochemical system. An electrochemically active layer is deposited on the build plate, and electrical potential is applied to generate inhibitor species in situ that prevent polymerization at the build plate interface. This eliminates the need for mechanical separation mechanisms while enabling continuous fabrication, thereby simplifying the process and increasing production speed.
Solution Approach 2:
The patent introduces an electrochemically active layer as an intermediary between the build plate and the polymerizable liquid. This layer serves as a mediator that, when electrical potential is applied, generates inhibitor species that prevent polymerization at the interface. This intermediary enables continuous fabrication without direct contact between the solidified layer and build plate, eliminating mechanical separation needs.
2Ease of manufacture
If mechanical separation steps are employed to remove solidified layers, then layer formation is possible, but additional mechanical elements complicate the apparatus
Solution Approach 1:
The patent replaces mechanical separation systems with an electrochemical system. An electrochemically active layer is deposited on the build plate, and electrical potential is applied to generate inhibitor species in situ that prevent polymerization at the build plate interface. This eliminates the need for mechanical separation mechanisms while enabling continuous fabrication, thereby simplifying the process and increasing production speed.
3Manufacturing precision
If mechanical separation is used to separate layers from the build plate, then layer formation can proceed, but the solidified layers may be distorted due to physical and chemical interactions
Solution Approach 1:
The patent introduces an electrochemically active layer as an intermediary between the build plate and the polymerizable liquid. This layer serves as a mediator that, when electrical potential is applied, generates inhibitor species that prevent polymerization at the interface. This intermediary enables continuous fabrication without direct contact between the solidified layer and build plate, eliminating mechanical separation needs.
Solution Approach 2:
The patent replaces mechanical separation systems with an electrochemical system. An electrochemically active layer is deposited on the build plate, and electrical potential is applied to generate inhibitor species in situ that prevent polymerization at the build plate interface. This eliminates the need for mechanical separation mechanisms while enabling continuous fabrication, thereby simplifying the process and increasing production speed.
4Productivity
If continuous fabrication without mechanical separation is implemented, then production speed increases, but a method must be provided to prevent polymerization at the build plate interface
Solution Approach 1:
The patent introduces an electrochemically active layer as an intermediary between the build plate and the polymerizable liquid. This layer serves as a mediator that, when electrical potential is applied, generates inhibitor species that prevent polymerization at the interface. This intermediary enables continuous fabrication without direct contact between the solidified layer and build plate, eliminating mechanical separation needs.
Solution Approach 2:
The patent replaces mechanical separation systems with an electrochemical system. An electrochemically active layer is deposited on the build plate, and electrical potential is applied to generate inhibitor species in situ that prevent polymerization at the build plate interface. This eliminates the need for mechanical separation mechanisms while enabling continuous fabrication, thereby simplifying the process and increasing production speed.
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 approach enables the continuous, non-destructive production of three-dimensional objects, avoiding mechanical separation issues and maintaining the integrity of the product, while allowing for remote fabrication and minimizing fault lines or distortions.
Implementation Method 1
an electrochemically active layer is deposited on the build plate and, when electrical potential is applied across the build plate, generates an inhibitor species in situ that prevents polymerization of the polymerizable liquid at the interface between the build plate and the polymerizable liquid
Implementation Method 2
UV light is supplied to the polymerizable liquid to sustain polymerization of the polymerizable liquid
Data Source
AI summary
A method of forming a three-dimensional object is carried out by: providing a carrier and an optically transparent member having a build surface, the carrier and the build surface defining a build region therebetween; filling the build region with a polymerizable liquid; irradiating the build region through the optically transparent member to form a solid polymer from the polymerizable liquid while concurrently advancing the carrier away from the build surface to form the three-dimensional object from the solid polymer, while also concurrently: (i) continuously maintaining a dead zone of polymerizable liquid in contact with the build surface by electrochemically generating a polymerization inhibitor therein from a precursor of the polymerization inhibitor, and (ii) continuously maintaining a gradient of polymerization zone (e.g., an active surface) between the dead zone and the solid polymer and in contact with each thereof, the gradient of polymerization zone comprising the polymerizable liquid in partially cured form. Apparatus for carrying out the method is also described.