Rapid Prototyping Resin Vat Leveling for Uniform First Layers
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Solution Overview
Problem
Existing rapid prototyping devices face instability and position displacement of the printing platform due to unstable connections during leveling, leading to poor model adherence and printing failures.
Innovation Solution
A rapid prototyping device with a moving assembly and positioning assemblies that adjust the inclination angle and height of the resin vat relative to the printing platform, ensuring parallelism and uniform thickness of the first layer through precise leveling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the printing platform is adjusted for leveling by moving it relative to the light transmission screen, then the parallelism between the forming surface and the screen is improved, but the connection stability of the printing platform deteriorates due to the movable connection with the lifting frame structure
Solution Approach 1:
The system is divided into independent functional modules: the printing platform assembly, the light transmission screen assembly, and the positioning mechanism. The screen assembly is separated from the printing platform, with the positioning assembly providing independent adjustment capability. This segmentation allows the screen to be positioned precisely without compromising the structural integrity or connection stability of the printing platform.
Solution Approach 2:
The positioning assembly pre-adjusts the light transmission screen to the correct parallel position relative to the printing platform before the actual printing process begins. This preliminary positioning ensures that when printing starts, the forming surface is already parallel to the screen, eliminating the need for continuous adjustment during printing and thus maintaining connection stability.
2Manufacturing precision
If the distance between the forming surface of the printing platform and the release film is not uniform due to assembly error or mechanical error, then the thickness uniformness of the first layer deteriorates, but the assembly structure becomes more complex requiring additional positioning mechanisms
Solution Approach 1:
The positioning assembly automatically compensates for assembly errors and mechanical deviations by providing self-adjusting positioning elements that adapt to the actual relative positions of the printing platform and resin vat. The positioning mechanism includes adjustable positioning blocks or cams that can be manually or automatically adjusted to eliminate gaps or uneven distances, ensuring uniform first layer thickness without requiring complex external positioning systems.
Solution Approach 2:
The positioning assembly allows for adjustment of the distance parameter between the forming surface and the release film by changing the position of the light transmission screen or the printing platform. This parameter adjustment capability enables compensation for assembly errors and ensures uniform thickness of the first layer while maintaining a relatively simple assembly structure through single-point adjustment mechanisms.
3Ease of operation
If the printing platform is movably connected to the lifting frame structure to allow leveling adjustment, then the ease of operation for leveling is improved, but the position stability of the printing platform during printing deteriorates due to external forces causing position displacement
Solution Approach 1:
The system employs a dynamic positioning mechanism where the light transmission screen can be adjusted relative to the printing platform during setup, but once positioned, the connection becomes rigid or locked. The positioning assembly includes movable adjustment elements during leveling, followed by fixation to ensure stability during printing. This dynamic-to-static transition allows easy leveling operation while maintaining position stability during the printing process.
Solution Approach 2:
The positioning assembly acts as an intermediary mechanism between the printing platform and the light transmission screen. It provides the necessary adjustment capability for leveling while isolating the printing platform from external forces that could cause position displacement. The positioning mechanism absorbs or compensates for external disturbances, maintaining the relative position between the platform and screen stable during printing.
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
Stabilizes the printing platform connection, ensuring accurate model formation by maintaining uniform layer thickness and preventing tilting, thus enhancing printing success.
Implementation Method 1
A photocuring rapid prototyping device takes advantage of a characteristic of a photosensitive resin in a fluid state undergoing a polymerization reaction under light
Data Source
AI summary
A rapid prototyping device is provided. The rapid prototyping device includes a frame with a substrate. A printing platform is slidably connected to the frame. A moving assembly includes a display screen assembly corresponding to the printing platform. The moving assembly cooperates with the substrate to move to a leveling position relative to the substrate under the pushing of the printing platform. A suspension member is configured to apply a pushing force, which enables the moving assembly to move away from the substrate, to the moving assembly. The positioning assembly is configured to position the moving assembly in the leveling position. The rapid prototyping device is applied to level the rapid prototyping device.