Adaptive Partitioned Casting Mould for Defect Reduction
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Solution Overview
Problem
Traditional casting mould manufacturing methods are inefficient and inflexible, leading to defects such as contraction cavities and cracks in castings due to unreasonable structural design and heat transfer issues, and are not suitable for one-piece or small-batch production of large castings.
Innovation Solution
A self-adaptive casting mould manufacturing method employing partitioning and assembling techniques, where individual sand partitions with specific materials and features are designed and assembled to adapt to the casting solidification process, allowing for active adjustment of stress and temperature fields, and inclusion of features like iron chills and air vent passages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional sand mould manufacturing method is used, then the process is simple and easy to operate, but the production cycle is long and manufacturing efficiency is low
Solution Approach 1:
The casting mould is divided into multiple partition units that can be manufactured independently and then assembled. This segmentation allows parallel processing of different mould sections, significantly reducing the overall production cycle while maintaining operational simplicity through standardized assembly procedures.
Solution Approach 2:
The partition units are pre-manufactured with embedded contraction rate adjustment structures and cooling channels before assembly. This preliminary preparation enables faster final assembly and reduces on-site adjustment time, thereby shortening the production cycle without complicating the operational process.
2Productivity
If rapid prototyping sand mould manufacturing method is used, then the production cycle is shortened, but the internal surface becomes compact and dense with poor air permeability
Solution Approach 1:
Different partition units are assigned different sand materials and contraction rates according to the local requirements of the casting structure. This allows optimization of air permeability in specific regions while maintaining fast production through selective material application rather than uniform processing.
Solution Approach 2:
The patent employs sand materials with controlled porosity and permeability characteristics in the partition units. By selecting appropriate porous sand materials and designing the mould structure to maintain air passage connectivity, good air permeability is achieved while still benefiting from rapid manufacturing techniques.
3Adaptability or versatility
If partitioning and assembling method is used, then the flexibility and adaptability of the casting mould is improved, but the device complexity increases
Solution Approach 1:
The casting mould is segmented into standardized partition units with uniform interfaces and assembly features. This standardization reduces the complexity of individual units while enabling flexible reconfiguration and adaptation to different casting requirements through various assembly combinations.
Solution Approach 2:
The partition units are designed with universal features and standardized interfaces that allow them to be used in multiple configurations and applications. This multi-functionality reduces the overall device complexity by using the same basic units for different casting scenarios, while maintaining high flexibility and adaptability.
Data Source
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AI summary
An adaptive production method for mould includes the following steps: constructing three-dimensional solid model of the mould according to the casting draw; reverse-evaluating the mould cavity; designing the sand mould (or core) into several sand partitions according to the mould structure; selecting different molding materials to produce the sand partitions; placing iron chills (4) or cooling tubes (3) etc. in the different parts of the mould based on the simulation result of the solidification; processing the sand partitions separately; assembling the sand partitions and then post-treating the assembled sand partitions; thus forming the final sand mould. The method can enhance the mould design flexibility and reduce the cost.