3D-Printed Single-Piece Engine Cores for Precision Casting
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Solution Overview
Problem
The conventional piecemeal core casting process in internal combustion engines leads to casting variance, suboptimal core configurations, unnecessary weight, and increased development time due to the need for assembly and drafts, resulting in inefficiencies and complexity.
Innovation Solution
A method involving the creation of a single-piece core using three-dimensional printing, where the core corresponds to the internal features of the engine, eliminating the need for assembly and drafts, and allowing for improved precision and consistency in casting by pouring a material into a mold with the single-piece core, which corresponds to the engine's internal shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If piecemeal cores are used in the casting process, then the core can be assembled from multiple parts, but casting variance increases and manufacturing precision deteriorates
Solution Approach 1:
The patent merges multiple piecemeal cores into a single integrated core structure. The single-piece core is designed to incorporate all internal features (chambers, conduits, cooling passages) that were previously created by assembling multiple separate cores, thereby eliminating assembly-related casting variance and improving manufacturing precision
2Ease of manufacture
If piecemeal cores are used in the casting process, then the core can be constructed from multiple parts, but device complexity increases
Solution Approach 1:
The patent combines multiple core components into a single-piece core, eliminating the need for complex assembly procedures. The single core structure integrates all internal engine features, reducing the number of parts to manufacture, assemble, and manage, thereby decreasing overall device complexity
Solution Approach 2:
Instead of creating multiple separate cores and assembling them, the patent inverts the approach by designing a single core that incorporates all internal features. This reversal of the conventional piecemeal approach simplifies both the design process and the final assembly requirements
3Ease of manufacture
If drafts are used in the core configuration, then the core can be removed from the mold, but unnecessary weight is added and manufacturing precision deteriorates
Solution Approach 1:
The patent extracts and eliminates the draft requirement from the core design. By using a single-piece core with optimized geometry and appropriate release agents, the core can be removed from the mold without requiring additional draft angles, thereby maintaining the intended core configuration and reducing unnecessary weight
4Ease of manufacture
If piecemeal cores are used in the casting process, then the core can be assembled from multiple parts, but loss of time increases due to assembly requirements
Solution Approach 1:
The patent merges multiple core components into a single integrated structure, eliminating the time-consuming assembly process. The single-piece core is manufactured as one unit and directly placed in the mold, significantly reducing development time and simplifying the manufacturing workflow
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 casting variance, eliminates the need for gaskets, enhances mechanical and thermal stability, and simplifies the manufacturing process by producing consistent, lightweight engine components with integrated features like gas vents, resulting in improved engine performance and reduced production time.
Implementation Method 1
printing a single-piece core of the engine according to specifications in a three-dimensional print file
Implementation Method 2
pouring a material in liquid state into a mold and solidifying the material to create a cast
Data Source
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AI summary
Methods of manufacturing engines are disclosed. A single-piece core is printed based on specifications in a three-dimensional print file. The single-piece core is then used in a casting process to create an engine. The three-dimensional print file includes specifications corresponding to each hollow interior feature of an engine. The three-dimensional print file may include specifications for one or more accessory features, and the single-piece core may be printed to include the one or more accessory features.