3D Printer Resin Vat Air Control for Sub-10 Micron Printing
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Solution Overview
Problem
Existing 3D printers struggle to produce 3D articles with feature sizes smaller than 10 microns efficiently, particularly in dimensions exceeding 5 centimeters, while maintaining precision and avoiding damage to transparent sheets.
Innovation Solution
A 3D printing system with a build vessel, air control system, and light engine, utilizing controlled air injection and extraction to manage the transparent sheet's tension and positioning, combined with a controller to execute precise movements and irradiation for layer formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If high pressure is applied to lift and peel the transparent sheet from the transparent plate, then the sheet separation is achieved, but the transparent sheet may be damaged or burst
Solution Approach 1:
A notch is provided in the transparent plate at a peripheral location to initiate sheet separation before main pressurization. This preliminary action creates a controlled starting point for peeling, allowing the sheet to separate gradually rather than requiring sudden high pressure that could damage the sheet.
Solution Approach 2:
The system replaces direct mechanical peeling force with controlled air pressure application. By using pneumatic pressure through the conduit system, the sheet is lifted and separated in a controlled manner rather than through direct mechanical force, reducing the risk of damage.
2Ease of operation
If uncontrolled air pressure is applied to the transparent sheet, then sheet lifting is achieved, but the sheet geometry becomes uncontrolled and the sheet may burst
Solution Approach 1:
The system first establishes controlled air pathways through notches and fluid channels before applying main pressurization. This preliminary configuration of air flow paths ensures that when pressure is applied, it distributes evenly and controllably, maintaining sheet geometry while achieving lifting.
Solution Approach 2:
The system uses controlled pressure application with the ability to monitor and adjust pressure levels. The conduit system allows for regulated air injection, enabling the operator to maintain pressure within safe limits that achieve lifting without exceeding the sheet's structural tolerance.
3Manufacturing precision
If rapid air extraction is applied to press the transparent sheet against the transparent plate, then sheet positioning is achieved, but air pockets may remain trapped
Solution Approach 1:
The fluid channels are pre-configured in the transparent plate to provide multiple air escape pathways before pressurization begins. These channels are positioned to intercept air pockets as the sheet is pressed down, allowing trapped air to escape through designated routes rather than remaining trapped under the sheet.
Solution Approach 2:
The air extraction system is divided into multiple fluid channels distributed across the plate surface. This segmentation creates multiple independent air escape paths, ensuring that even if some channels are blocked, other channels can still evacuate air pockets effectively, improving overall reliability.
4Manufacturing precision
If high resolution structures with feature sizes less than 10 microns are produced, then manufacturing precision is improved, but production efficiency decreases
Solution Approach 1:
The system replaces traditional mechanical contact-based 3D printing with a pneumatic field-based approach. By using controlled air pressure and flow through the transparent sheet and plate system, the invention achieves high precision positioning and layer formation without the mechanical wear and positioning errors that limit resolution in conventional systems, enabling sub-10-micron features while maintaining 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
Enables the production of high-resolution 3D articles with feature sizes below 10 microns, maintaining dimensional accuracy and preventing sheet damage, thus enhancing the efficiency and precision of the manufacturing process.
Implementation Method 1
operate the air control system to inject a controlled volume of air into the conduit, the controlled volume of air inflating a volume of air between the transparent sheet and the transparent plate
Implementation Method 2
operate the air control system to apply a controlled negative gauge pressure to the conduit, the controlled negative gauge pressure extracting the air between the transparent sheet and the transparent plate
Implementation Method 3
operate the light engine to selectively irradiate and to harden a layer of the photocurable resin over the build plane to redefine the lower face
Data Source
AI summary
A three-dimensional (3D) printing system configured to manufacture a three-dimensional (3D) article includes a base, a build vessel, an air control system, a build plate, a light engine, and a controller. The build vessel is configured to contain a body of photocurable resin. The build vessel includes a transparent plate, a support frame, and a transparent sheet. The transparent plate has a planar upper surface. The support frame defines a conduit that extends to a peripheral edge of the transparent plate. The transparent sheet is tensioned over the planar upper surface of the transparent plate and extends over the support frame. The controller is programmed to operate the air control system to inject a controlled volume of air then to apply a controlled negative gauge pressure to the conduit. This has the effect of inflating and deflating the transparent sheet relative to the planar upper surface of the transparent plate.