Detachable Folding Core for High-Pressure Die Casting
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Solution Overview
Problem
Conventional folding cores used in plastic injection molding are not suitable for metal die-casting technology due to their inability to withstand the higher pressures involved and are permanently installed in the mold half, requiring the entire mold half to be dismantled for core replacement.
Innovation Solution
A detachable folding core design with a core cylinder body composed of alternately arranged first and second core jaws that can move relative to each other, allowing for axial and radial movement, enabling the core to be removed and reattached between casting cycles without disassembling the mold half, and featuring a latching mechanism for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional folding core is permanently installed in the mold half, then the core can withstand the high pressures of metal die-casting, but the entire mold half must be dismantled for core replacement
Solution Approach 1:
The folding core is divided into a core body and a core holder as separate components. The core body can be independently removed from the core holder without dismantling the entire mold half, enabling easy replacement while maintaining structural integrity during operation.
Solution Approach 2:
The core body is extracted as a removable component from the mold assembly through the core ejector opening. This allows the core to be taken out and replaced independently while the mold half remains assembled and functional.
2Stability of the object's composition
If a conventional folding core is permanently installed in the mold half, then the core structure remains stable during casting, but core replacement requires complete mold disassembly
Solution Approach 1:
The folding core system is segmented into a stable core holder remaining in the mold and a removable core body. This segmentation maintains structural stability during casting while enabling rapid core body replacement through the ejector opening without complete mold disassembly.
Solution Approach 2:
The core holder is pre-installed and secured in the mold half before casting operations begin. This preliminary action ensures structural stability is established, while the removable core body can be quickly swapped out between cycles without affecting the pre-installed holder structure.
3Device complexity
If the folding core is designed for plastic injection molding, then the structure is simple, but it cannot withstand the significantly higher pressures of metal die-casting
Solution Approach 1:
The core system separates the simple removable core body from the pressure-resistant core holder that remains in the mold. This segmentation allows the core body to maintain simplicity for easy replacement while the core holder provides the necessary pressure resistance for metal die-casting applications.
Data Source
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AI summary
The invention relates to a hollow core (1) for attachment to a mould half (2) of a casting mould, particularly a die-casting mould and to a casting mould half equipped with a folding core of this kind. According to the invention, the hollow core can take the form of a removable hollow core which can be detachably mounted on the mould half on the mould cavity side. A hollow core according to the invention can have a core cylinder body (4) of at least two first core sections (5a, 5b) in the form of cylinder segments and at least two second core sections (6a, 6b) in the form of cylinder segments arranged alternating with the first sections over the circumferential direction, wherein the first and the second core sections are retained moveably relative to one another. The relative movement here between the first and the second core sections consists of an axial relative movement component between the first and the second core sections and a radial collapsing movement of the first and/or the second core section.