Hermetic Capsule for Additive Manufacturing Powder Traceability
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Solution Overview
Problem
Additive manufacturing processes face challenges in tracing the pedigree and properties of powdered metal due to contamination from oxidation, humidity, and mixed material sources, making it difficult to document the condition and properties of the material used in the final product.
Innovation Solution
A method involving the formation of a hermetically sealed capsule with an internal chamber during the additive manufacturing process to encapsulate a sample of powder, which is then analyzed to categorize the product, minimizing contamination through torsional stress severance and in-process identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pulverant material is made from increasingly fine particles to achieve ever-thinner layers, then manufacturing precision is improved, but the pulverant material begins to clump and oxidation rates increase
Solution Approach 1:
The patent applies inert atmosphere by conducting the additive manufacturing process in an environment with controlled atmosphere (reducing oxidation), and by designing capsules with hermetic seals to create inert environments that protect powder samples from oxidation during storage and transport. The inert environment prevents harmful oxidation reactions while maintaining fine particle quality.
Solution Approach 2:
The patent uses flexible hermetic seals and thin film barriers to create airtight capsules that enclose powder samples. These flexible sealing mechanisms prevent external contamination while allowing the capsule to be integrated into the rigid additive manufacturing process, protecting fine particles from oxidation without affecting manufacturing precision.
2Productivity
If production parts are built from a mixture of virgin material, recycled, or reprocessed metal powder, then productivity is improved, but it becomes difficult to document the condition and properties of the powdered metal
Solution Approach 1:
The patent applies segmentation by separating the powder sample from the main build process through encapsulation. Individual capsules contain discrete powder samples with unique identification, allowing traceability of each material batch while enabling high-volume production. This segmentation maintains productivity by parallelizing sample collection while preserving material information through individual tracking.
Solution Approach 2:
The patent uses capsules as intermediary carriers between the powder feedstock and the final product. These capsules serve as mediators that preserve and transport material information (pedigree, composition, properties) without interfering with the additive manufacturing process, enabling both high productivity and complete material traceability.
3Measurement precision
If a hermetically sealed capsule is formed during additive manufacturing to encapsulate powder samples, then measurement precision of material properties is improved, but device complexity increases
Solution Approach 1:
The patent merges the capsule formation process with the existing additive manufacturing system. The capsule is built using the same layer-by-layer deposition process as the product itself, integrating sample encapsulation into the standard manufacturing workflow. This merging reduces device complexity by utilizing existing equipment capabilities rather than adding separate specialized systems.
Solution Approach 2:
The additive manufacturing system is designed to perform multiple functions: building the final product and simultaneously forming hermetically sealed capsules containing powder samples. This multi-functionality reduces device complexity by eliminating the need for separate sample collection and encapsulation equipment, achieving measurement precision through an integrated universal system.
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
This method ensures minimal contamination and allows for accurate documentation and categorization of the powder's properties, enhancing the traceability and quality assurance of additively manufactured products by maintaining a controlled environment and preventing external interference during sample retrieval.
Implementation Method 1
The internal chamber is hermetically sealed from an exterior environment to retain the sample of powder in the internal chamber
Implementation Method 2
The capsule is then severed along a groove in the capsule by applying torsional stress to flanges at the distal ends of the capsule
Data Source
AI summary
A method of obtaining a sample of materials includes building a product through an additive manufacturing process. A capsule is formed with an internal chamber inside of the capsule. The capsule is formed during the building of the additive manufacturing product. A sample of powder is encapsulated inside the internal chamber as the capsule is built. The internal chamber is hermetically sealed from an exterior environment to retain the sample of powder in the internal chamber.