Additive Manufacturing Powder Coating for Degreasing Efficiency
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Solution Overview
Problem
Fine metal powders used in additive manufacturing require a larger amount of binder due to high bulk density, leading to prolonged degreasing times and residual binder issues in the sintered bodies.
Innovation Solution
A powder for additive manufacturing with coated particles containing metal particles and resin coating films that include a caking additive, where the average thickness of the resin coating films is between 0.0001 and 0.0010 times the average particle diameter of the metal particles, facilitating efficient degreasing and sintering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fine metal powder is used to improve manufacturing precision, then manufacturing precision is improved, but the amount of binder required increases leading to prolonged degreasing time
Solution Approach 1:
The invention changes the chemical composition parameters of the binder by specifying a particular ratio of carboxylic acid (0.1-10 mass%) and phenolic resin (10-50 mass%) within the total binder content. This parameter optimization allows the binder to be more efficiently removed during degreasing, reducing degreasing time while maintaining the benefits of fine metal powder for manufacturing precision.
Solution Approach 2:
The invention uses a composite binder system combining carboxylic acid and phenolic resin together with metal powder. This composite material approach creates a binder that has optimized degradation characteristics, allowing it to break down more efficiently during degreasing compared to conventional single-component binders, thus reducing the 25 parameter (degreasing time) while maintaining 29 parameter (manufacturing precision).
2Manufacturing precision
If fine metal powder is used to improve manufacturing precision, then manufacturing precision is improved, but residual binder remains in the sintered body affecting quality
Solution Approach 1:
The invention optimizes the chemical composition parameters of the binder by specifying carboxylic acid at 0.1-10 mass% and phenolic resin at 10-50 mass%. This parameter control ensures complete degradation of the binder during sintering, eliminating residual binder (31 parameter) while preserving the fine metal powder characteristics that provide manufacturing precision (29 parameter).
Solution Approach 2:
The invention converts the potential harm of binder residue into a benefit by selecting binder components (carboxylic acid and phenolic resin) that degrade completely during the sintering process. The binder's chemical structure is designed to break down into volatile products that escape during sintering, transforming what would be a harmful residue into a beneficial complete removal, thus eliminating 31 parameter (residual binder) while maintaining 29 parameter (manufacturing precision).
3Manufacturing precision
If fine metal powder is used to improve manufacturing precision, then manufacturing precision is improved, but the complexity of the degreasing process increases
Solution Approach 1:
The invention simplifies the degreasing process by optimizing the binder's chemical composition parameters (carboxylic acid 0.1-10 mass%, phenolic resin 10-50 mass%). This composition enables the binder to degrade at standard sintering temperatures without requiring additional degreasing equipment or complex multi-step processes, thus reducing 36 parameter (process complexity) while maintaining 29 parameter (manufacturing 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
This approach reduces the time required for degreasing, enhances the density and surface accuracy of the sintered bodies, and minimizes residual carbon, resulting in high-quality metal sintered bodies with improved mechanical strength and dimensional accuracy.
Implementation Method 1
resin coating films that cover the metal particles and contain a caking additive
Data Source
AI summary
A powder for additive manufacturing, which is a powder to be used in a three-dimensional additive manufacturing method, including a plurality of coated particles containing metal particles, and resin coating films that cover the metal particles and contain a caking additive, wherein 0.0001≤t/D50≤0.0010 in which t is an average thickness of the resin coating films and D50 is an average particle diameter of the metal particles.