3D Printing Surplus Powder Management via Impact Applicator
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Solution Overview
Problem
In three-dimensional object fabrication using the lamination method, surplus powder not used in forming powder layers accumulates and is difficult to manage effectively, leading to inefficiencies and inaccuracies in the fabrication process.
Innovation Solution
A three-dimensional fabricating apparatus with a surplus powder chamber and an impact applicator to collect and manage surplus powder, using a flattening member to move and impact the surplus powder, ensuring it is recycled and reused, while preventing powder leakage and uneven accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If a surplus powder chamber is disposed to collect surplus powder, then powder waste is reduced, but powder accumulation becomes uneven and difficult to manage
Solution Approach 1:
The patent applies vibration to the surplus powder chamber to prevent uneven powder accumulation and facilitate smooth powder flow. The vibration mechanism shakes the chamber periodically, preventing powder from settling in clumps and ensuring uniform distribution, which directly addresses the management difficulty while maintaining powder collection efficiency
Solution Approach 2:
The patent changes the physical state and flow characteristics of powder by applying vibration and impact forces. This transforms the static, unevenly accumulated powder into a dynamically flowing material that can be easily managed and redistributed, converting the management problem into a controlled flow process
2Manufacturing precision
If the flattening member relatively moves to fill the fabrication chamber with powder, then powder distribution is improved, but surplus powder accumulation occurs
Solution Approach 1:
The patent implements a system where surplus powder is temporarily discarded into a separate chamber during the flattening process, then recovered through vibration-induced flow back to the fabrication chamber. This allows precise powder distribution during fabrication while recovering and reusing the surplus powder, preventing waste while maintaining manufacturing precision
Solution Approach 2:
The patent segments the powder management system into distinct zones: the fabrication chamber for precise powder application and the surplus powder chamber for temporary storage and redistribution. This segmentation allows the flattening member to focus on precise distribution in the fabrication chamber while the surplus chamber handles excess powder separately, resolving the contradiction between precision and surplus accumulation
3Productivity
If the impact applicator impacts on the surplus powder chamber, then powder flow is improved, but device complexity increases
Solution Approach 1:
The impact applicator is designed to be movable with the flattening member, allowing it to self-position and impact the surplus powder chamber automatically during the normal operation cycle. This self-service mechanism improves powder flow efficiency without requiring separate complex control systems or additional actuators, as the existing flattening member motion drives the impact action
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 enhances the efficiency and accuracy of the fabrication process by effectively managing surplus powder, reducing waste, and maintaining the quality of the fabricated object by ensuring consistent powder supply and distribution.
Implementation Method 1
The impact applicator is movable with the flattening member to contact and impact on the surplus powder chamber
Data Source
AI summary
A three-dimensional fabricating apparatus includes a fabrication chamber, a flattening member, a surplus powder chamber, and an impact applicator. The fabrication chamber stacks powder in layers and a layered fabrication object in which the powder is bonded together. The flattening member relatively moves with respect to the fabrication chamber to fill the fabrication chamber with the powder. The surplus powder chamber is disposed outside the fabrication chamber, to receive a surplus of the powder having not been filled in the fabrication chamber. The impact applicator is movable with the flattening member to contact and impact on the surplus powder chamber.