Sugar-Based Mold Composition for Complex Shape Casting
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Solution Overview
Problem
Existing moulding processes face challenges in producing workpieces with complex shapes and cavities or undercuts due to the limitations of traditional lost moulds, such as toxicity, high cost, and difficulty in removing metallic mould cores, while plastic mould cores require slow dissolution or thermal decomposition, which can damage the workpiece.
Innovation Solution
A moulding composition comprising at least 20% sugar component and an aggregate, forming a compact three-dimensional structure that provides mechanical stability and easy removability, allowing for the production of moulds that can be melted, burnt, or dissolved for removing complex geometries without damaging the workpiece.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metallic mould cores are used for complex shapes, then mechanical strength is improved, but toxicity and difficulty in removal worsen
Solution Approach 1:
The patent changes the chemical composition parameters of the mould core material from traditional metallic or plastic compositions to a sugar-based composition (sucrose, glucose, fructose) combined with ceramic particles. This parameter change eliminates toxicity while maintaining mechanical strength through the ceramic reinforcement, directly resolving the contradiction between strength and harmful factors.
Solution Approach 2:
The invention creates a composite material system combining organic sugar components with inorganic ceramic particles. The sugar matrix provides ease of removal through dissolution or decomposition, while the ceramic particles provide mechanical strength and structural stability, resolving the contradiction between strength and removability.
2Ease of operation
If plastic mould cores are used for complex shapes, then ease of removal is improved, but workpiece damage due to slow dissolution or thermal decomposition worsens
Solution Approach 1:
The patent changes the thermal and chemical parameters of the mould core material by using sugar-based composition with ceramic particles. This composition allows for rapid dissolution in water or controlled thermal decomposition at lower temperatures, improving ease of removal while preventing workpiece damage through gentle decomposition characteristics.
Solution Approach 2:
The sugar-based mould core is designed as a disposable, single-use component that is intentionally consumed during the manufacturing process. The low cost and ease of decomposition of sugar materials allow the mould core to be completely removed without damaging the workpiece, resolving the contradiction between ease of removal and workpiece protection.
3Stability of the object's composition
If traditional lost moulds are used for complex shapes, then mechanical stability is improved, but manufacturing cost and environmental impact worsen
Solution Approach 1:
The patent changes the material composition parameters from expensive traditional lost mould materials (metallic alloys, specialized plastics) to inexpensive sugar-based materials combined with ceramic particles. This parameter change maintains mechanical stability through ceramic reinforcement while dramatically reducing manufacturing cost and environmental impact.
Solution Approach 2:
The invention employs inexpensive sugar-based mould cores that are designed for single use. The low material cost of sugar and ceramic particles, combined with simple manufacturing processes, resolves the contradiction between mechanical stability and manufacturing cost, making complex shape production economically viable.
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
The sugar-based moulds offer high mechanical strength, low density, and ease of removal, enabling the production of complex workpieces with reduced material costs and environmental impact, as they can be dissolved in water or thermally decomposed without damaging the final product.
Implementation Method 1
which can be melted, burnt, or dissolved for removing complex geometries
Implementation Method 2
which can be melted, burnt, or dissolved for removing complex geometries without damaging the workpiece
Implementation Method 3
as they can be dissolved in water or thermally decomposed without damaging the final product
Data Source
AI summary
A moulding composition comprising at least one sugar component in a weight proportion of at least 20% in relation to the weight of the moulding composition, and at least one aggregate as well as a mould for a moulding process, wherein the mould is a compact three-dimensional structure made of the moulding composition, and a process for moulding a workpiece with the mould.