Casting Core Orientation for Cylinder Head Production
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Solution Overview
Problem
Current cylinder head casting methods face challenges such as high thermal stress on the base plate, restricted design freedom, complex and costly production processes, and inefficiencies in lost core alignment and positioning, limiting the ability to create complex shapes.
Innovation Solution
A method involving the construction of cast cores from individual core components using rapid prototyping or three-dimensional printing, where two core components are connected to a sprue core component in an opposite orientation, allowing for simultaneous production of two cylinder heads in a single mold with reduced thermal stress and material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cylinder heads are aligned from top to bottom in the mold, then the casting process can be performed with conventional base plate positioning, but high thermal stress occurs on the base plate and production capacity is limited
Solution Approach 1:
The patent changes the alignment dimension from vertical (top-to-bottom) to horizontal (side-by-side), allowing two cylinder heads to be cast simultaneously in opposite orientations. This dimensional change eliminates thermal stress on the base plate while doubling production capacity
2Adaptability or versatility
If conventional top-to-bottom alignment is used, then demouldability can be ensured, but design freedom is restricted and complex shapes cannot be created
Solution Approach 1:
The patent inverts the conventional casting approach by positioning cylinder heads in opposite orientations with combustion chambers facing each other, rather than the traditional top-to-bottom alignment. This inversion enables complex designs while maintaining demouldability through the build-up core method
3Productivity
If conventional casting methods are used, then the process is well-established, but production is complex and cost-intensive with time-consuming alignment and positioning
Solution Approach 1:
The patent merges two separate cylinder head casting operations into a single mold cycle by positioning core components for two cylinder heads in opposite orientations within one mold. This combining doubles production capacity while simplifying the overall manufacturing process
Solution Approach 2:
The patent segments the casting core into multiple build-up core components that can be independently manufactured and then assembled. This segmentation enables complex geometries to be created more easily and reduces the complexity of single-piece core manufacturing
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 doubles production capacity, reduces thermal stress on the base plate, enhances design freedom, minimizes material and manufacturing costs, and simplifies the assembly process, while maintaining precise alignment and geometry.
Implementation Method 1
selective solidification of layers of molding material under the action of electromagnetic radiation
Data Source
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AI summary
The present invention relates to a method for producing a casting core (10) for manufacturing cylinder heads (100), said method comprising the following steps: - producing at least one core component (20), by a constructive method, with a contour for the formation of internal contours (110) of a first cylinder head (100), - producing at least one further core component (30), by a constructive method, with a contour for the formation of internal contours (110) of a further cylinder head (100), - producing at least one sprue core component (40) for feeding the molten mass during the casting method, - joining the two core components (20, 30) to the sprue core component (40) in an opposing orientation.