Powder Supply Assembly Vibration Control for Additive Manufacturing
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Solution Overview
Problem
Existing three-dimensional printing systems are slow, have low throughput, and are costly to operate, generating excessive waste.
Innovation Solution
A processing machine with a powder supply assembly that includes a powder container, a supply outlet, and a flow control assembly with a vibration generator to accurately and efficiently distribute powder onto a build platform, allowing for precise control of powder flow using mesh screens and aperture structures, and optionally includes a shutter assembly for further control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional powder supply methods are used, then the system is simpler, but the powder distribution accuracy and uniformity deteriorate
Solution Approach 1:
The powder supply assembly is divided into multiple independent modules including vibration generators, flow controllers with mesh screens, and aperture structures. Each component performs a specific function in the powder distribution process, allowing for precise control while maintaining modular simplicity
Solution Approach 2:
Vibration generators are integrated into the powder supply assembly to induce controlled vibrations in the powder container. This mechanical vibration promotes uniform powder flow through the mesh screen and aperture structures, significantly improving distribution accuracy and preventing powder bridging or clogging
2Productivity
If faster powder deposition is used, then the printing speed improves, but the powder distribution uniformity deteriorates
Solution Approach 1:
The system maintains continuous powder flow through the vibration generator and flow controller assembly, ensuring that powder is deposited at a steady rate without interruption. This continuous action allows for faster deposition while maintaining uniformity through consistent vibration and controlled flow through the aperture structures
Solution Approach 2:
The vibration frequency and amplitude are optimized to match the deposition speed. By adjusting these vibration parameters, the system can accommodate faster printing speeds while maintaining powder layer uniformity through enhanced powder fluidization and flow control
3Reliability
If more powder is deposited to ensure coverage, then the coverage completeness improves, but the material waste increases
Solution Approach 1:
The flow controller with mesh screen and aperture structures provides localized control over powder flow rates. This allows the system to deposit the precise amount of powder needed for complete coverage without excessive material, optimizing both coverage completeness and reducing waste through precise dosing
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
Improves the accuracy and speed of object formation, reducing the time and cost associated with three-dimensional printing while minimizing waste.
Implementation Method 1
a vibration generator that selectively vibrates at least a portion of the powder supply assembly
Implementation Method 2
gravity urges the powder in the powder container against the flow controller
Data Source
AI summary
A processing machine (10) for building an object (11) from powder (12) includes a build platform (26A); a powder supply assembly (18) that deposits the powder (12) onto the build platform (26A) to form a powder layer (13); and an energy system (22) that directs an energy beam (22D) at a portion of the powder (12) on the build platform (26A) to form a portion of the object (11). The powder supply assembly (18) can include (i) a powder container (640A) that retains the powder (12); (ii) a supply outlet (639) positioned over the build platform (26A); and (ii) a flow control assembly (642) that selectively controls the flow of the powder (12) from the supply outlet (639).