3D Printing Fusing and Detailing Agents for Dimensional Accuracy
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Solution Overview
Problem
Current 3D printing methods face challenges in achieving precise control over the application of fusing and detailing agents, leading to issues with dimensional accuracy and breakability of printed objects, as well as unwanted coalescence bleed due to thermal diffusion.
Innovation Solution
A 3D printing method and system that selectively applies fusing agents to solidification portions and detailing agents to fracture volumes within the build material, using a combination of print heads and radiation sources to control the fusion process, while preventing unwanted fusing in detailing and edge zones through the use of modifying agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thermal radiation is applied to fuse build material layers, then interlayer bonding is achieved, but unwanted coalescence bleed occurs due to thermal diffusion
Solution Approach 1:
The patent applies different properties to different zones: the build material in object regions has fusibility enhanced by the fusing agent, while the build material in detailing zones maintains resistance to fusing through the detailing agent. This local differentiation allows thermal radiation to bond layers in object regions without causing unwanted coalescence in detailing zones, resolving the contradiction between interlayer bonding and dimensional accuracy
Solution Approach 2:
The fusing agent and detailing agent act as intermediaries between the thermal radiation and the build material. The fusing agent mediates to enhance fusibility and promote bonding where needed, while the detailing agent mediates to inhibit fusing and prevent coalescence bleed where not needed. These intermediaries control the thermal diffusion process to achieve both strong bonding and precise dimensions
2Strength
If fusing agents are applied to promote material fusion, then interlayer bonding improves, but unwanted fusing occurs in detailing and edge zones
Solution Approach 1:
The patent selectively applies the fusing agent only to build material within a predetermined distance from the center of each pixel in the fusing pattern, excluding detailing and edge zones. This local application ensures enhanced fusibility and strong interlayer bonding in object regions while preventing unwanted fusing in detailing zones, thereby resolving the contradiction between bonding strength and dimensional accuracy
Solution Approach 2:
The build material layer is segmented into different functional zones: object regions where fusing agents are applied to promote bonding, and detailing zones where fusing agents are excluded to maintain dimensional accuracy. This segmentation allows differential control of fusibility across the layer, resolving the contradiction between interlayer bonding and prevention of unwanted coalescence
3Ease of operation
If detailing agents are applied to prevent fusing in specific zones, then breakability improves, but application precision is difficult to control
Solution Approach 1:
The patent applies the detailing agent selectively to build material in detailing zones, which are located at predetermined distances from the center of each pixel. This local application gives the detailing agent precise control over where breakability is enhanced, allowing easy control of object separation while maintaining manufacturing precision through defined application zones
Solution Approach 2:
The detailing agent is applied in advance to specific zones before the fusing process occurs. This preliminary action pre-establishes regions of reduced fusibility in detailing zones, ensuring that when thermal radiation is applied, these zones remain unfused and provide controlled breakability. The preliminary application of the detailing agent simplifies subsequent breakability control while maintaining precision
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
Enhances the precision and accuracy of 3D printing by preventing coalescence bleed and improving the breakability of printed objects, allowing for more controlled layer formation and interlayer bonding, thus improving the overall quality and dimensional accuracy of the printed objects.
Implementation Method 1
The fusing agent 28 may absorb the radiation 31 and promote transfer of thermal energy to the build material 16 in proximity thereof
Implementation Method 2
The fusing agent 28 may absorb the radiation 31 and promote transfer of thermal energy to the build material 16 in proximity thereof
Implementation Method 3
exposure to the radiation 31 causes the build material in the solidification portions to melt and fuse together
Implementation Method 4
The detailing agent 29 may absorb some of the radiation 31 and convert the absorbed radiation to other forms of energy
Implementation Method 5
exposure to the radiation 31 causes the build material in the solidification portions to melt and fuse together
Data Source
AI summary
A method of three-dimensional (3D) printing is provided. Print data is received, which defines patterns of at least one agent to be applied to a layer of build material. The print data is modified to add a further pattern of a detailing agent to be selectively applied to the layer of build material to generate fracture regions in a processed volume of build material.