Casting Core Holding Device with Interference Fit
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Solution Overview
Problem
Casting cores in current methods often result in holes or protrusions in cast parts due to the need for positioning pins or core supports, which require finishing work and increase manufacturing costs.
Innovation Solution
A holding device with clamping portions that form an interference fit with the casting core and mold, allowing secure fixation without external supports, using materials matching or influencing the cast part's properties, and designed for force- and form-fitting arrangements to minimize mechanical loading and optimize casting processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If positioning pins or core supports are used to hold casting cores, then the cores can be securely positioned in the mold, but holes or protrusions remain in the cast part requiring finishing work
Solution Approach 1:
The invention extracts the positioning function from separate positioning pins or core supports and integrates it directly into the mold cavity structure. The holding device is formed as an integral part of the mold, eliminating the need for separate positioning elements that would leave holes or protrusions in the cast part.
Solution Approach 2:
The invention merges the positioning function with the mold cavity structure. The holding device is formed integrally with the mold, combining the mold's shaping function with the core positioning function, thereby eliminating separate positioning elements and their associated defects.
2Reliability
If core supports are used to hold casting cores under high pressure, then the cores remain stable, but the core supports remain as foreign bodies in the cast part
Solution Approach 1:
The invention merges the core support function with the mold cavity structure. The holding device is formed as an integral part of the mold, so that the support structure becomes part of the final cast geometry rather than a separate foreign body that needs to be removed or finished.
Solution Approach 2:
The invention extracts the foreign body problem by eliminating separate core supports. The positioning function is achieved through the mold cavity structure itself, so no separate support elements remain in the cast part as foreign bodies.
3Manufacturing precision
If positioning pins are used to position cores, then accurate positioning is achieved, but holes remain in the cast part requiring finishing work
Solution Approach 1:
The invention extracts the positioning function from separate positioning pins and integrates it into the mold cavity structure. This maintains accurate positioning while eliminating the holes that would require finishing work.
Solution Approach 2:
The invention merges the positioning function with the mold cavity structure, so that the positioning features are formed as integral parts of the mold rather than separate elements that create holes requiring finishing.
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 holding device enables secure, positionally accurate fixation of casting cores, reducing finishing work and manufacturing costs, while allowing for precise control of component thickness and properties, such as thermal conductivity and stiffness, without leaving holes or protrusions in the cast part.
Implementation Method 1
the holding device or the clamping region is designed for the force-fitting, or form- and force-fitting arrangement of the casting core. Preferably, for holding or fixing the casting core by way of the holding device, an interference fit is provided.
Data Source
AI summary
A holding device for holding a casting core in a casting mold, especially in a die-casting mold, includes a plurality of clamping sections which are positioned in relation to each other in such a way that a clamping region for a casting core is formed.