Lamination Shaping Powder Evaluation Using Satellite Adhesion and Density

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Solution Overview

Problem

The measurement of fluidity using JIS Z 2502 for lamination shaping powders is unstable, making it difficult to evaluate fine powders and assess their squeegeeing properties, which are crucial for lamination shaping processes.

Innovation Solution

Evaluating the squeegeeing property of lamination shaping powders using the satellite adhesion ratio and apparent density, providing stable criteria for assessing their flowability and spreadability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If fluidity measurement complying with JIS Z 2502 is used to evaluate lamination shaping powder, then the measurement can be performed using standard methods, but the measurement results are unstable and fine powders cannot be reliably measured

Engineering Contradiction:

Improveease of measurementVSAvoidmeasurement stability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent changes the measurement parameters from standard JIS Z 2502 fluidity measurement to satellite adhesion ratio and apparent density measurements. This parameter change enables reliable evaluation of fine powders that cannot be properly assessed by conventional fluidity measurements, while maintaining ease of measurement through established testing methods.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If conventional fluidity measurement is used, then the evaluation process is simple, but it does not directly relate to the squeegeeing property of powder in lamination shaping apparatus

Engineering Contradiction:

Improveevaluation complexityVSAvoidsqueegeeing property evaluation accuracy

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent replaces the mechanical fluidity measurement system with a combined evaluation system using satellite adhesion ratio and apparent density. This substitution provides more accurate prediction of squeegeeing properties in lamination shaping while maintaining relatively simple evaluation procedures through standard measurement techniques.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS11644397B2Lamination shaping powder evaluation method and lamination shaping powder therefor

Publication Date: 2023.05.09 FUKUDA METAL FOIL & POWDER CO LTD

AI summary

This invention relates to a method of evaluating a squeegeeing property of powder for lamination shaping by stable criteria. In this method, the squeegeeing property is evaluated using at least a satellite adhesion ratio of the powder and an apparent density of the powder. The satellite adhesion ratio is the ratio of the number of particles on which satellites are adhered to the number of all particles. If the satellite adhesion ratio is equal to or less than 50%, and the apparent density is equal to or more than 3.5 g/cm3, the squeegeeing property is evaluated as that the powder can be spread into a uniform powder layer in the lamination shaping. Furthermore, if the 50% particle size of a powder obtained by a laser diffraction method is 3 to 250 μm, the squeegeeing property is evaluated as that the powder can be spread into a uniform powder layer in the lamination shaping.