Cast Article Manufacturing Structure for Low Gas Defects and Burn-On
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Solution Overview
Problem
Existing casting molds face challenges in improving handleability, reducing gas defects, and minimizing burn-on during the manufacturing process of cast articles.
Innovation Solution
A structure for manufacturing cast articles is developed, incorporating organic fibers and inorganic particles with specific properties, including a network of organic fibers on the surface and interior, and inorganic particles with varying melting points, to enhance toughness, handleability, and reduce gas defects and burn-on.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If organic components are added to improve handleability and toughness, then the structure becomes more manageable, but gas defects and burn-on increase due to organic material combustion
Solution Approach 1:
The patent applies parameter changes by precisely controlling the organic component content within 3-15 mass % and the mass reduction rate within 1-20 mass %. By optimizing these parameters, the structure achieves improved handleability while limiting gas defect formation to acceptable levels.
Solution Approach 2:
The patent uses composite materials by combining organic components (fibers, resins, or powders) with inorganic particles in specific proportions. This composite structure provides both the handleability benefits of organic materials and the gas-defect reduction advantages of inorganic components.
2Ease of operation
If organic components are increased to reduce burn-on, then handleability improves, but gas defects increase due to combustion gases
Solution Approach 1:
The patent controls burn-on by adjusting the organic component content to 3-15 mass % and the mass reduction rate to 1-20 mass %. This parameter optimization ensures sufficient handleability while minimizing burn-on occurrence on cast article surfaces.
Solution Approach 2:
The patent uses inorganic particles as a substitute or supplement to organic components, creating a composite structure that replicates the handleability benefits of pure organic materials while reducing the harmful combustion effects.
3Object-generated harmful factors
If mass reduction rate is increased to reduce gas defects, then gas defects decrease, but handleability and toughness deteriorate
Solution Approach 1:
The patent identifies the optimal mass reduction rate range of 1-20 mass % as the key parameter that balances gas defect reduction with maintenance of handleability and toughness. Within this range, the structure achieves both goals simultaneously.
Solution Approach 2:
The composite structure of organic components combined with inorganic particles allows the system to achieve a mass reduction rate within the optimal 1-20 mass % range, reducing gas defects while the organic component content (3-15 mass %) maintains sufficient handleability and toughness.
4Strength
If organic component content is increased to improve toughness, then bending stress increases, but burn-on and gas defects worsen
Solution Approach 1:
The patent optimizes the organic component content to 3-15 mass % and controls the mass reduction rate to 1-20 mass %, achieving a balance where maximum bending stress reaches 9 MPa or more while burn-on and gas defects remain at acceptable levels.
Solution Approach 2:
The composite material system combines organic components (providing toughness and bending strength) with inorganic particles (reducing combustion effects). This composite approach enables the structure to achieve 9 MPa or more in maximum bending stress while minimizing burn-on and gas defects.
Data Source
AI summary
A structure for manufacturing a cast article includes an organic component, at least a portion thereof being an organic fiber. The structure has a mass reduction rate of 1 mass % or greater to less than 20 mass % when heated under nitrogen atmosphere at 1000° C. for 30 minutes. The cast-article-manufacturing structure includes an inorganic particle. The cast-article-manufacturing structure includes, as the inorganic particle, a first inorganic particle having a predetermined shape and/or physical property, and a second inorganic particle having a predetermined shape and/or physical property different from the first inorganic particle. In addition thereto or instead thereof, the cast-article-manufacturing structure has a maximum bending stress of 9 MPa or greater measured in conformity with JIS K7017, and a bending strain of 0.6% or greater at the maximum bending stress.