Two-Part Feeder Element for Filigree Metal Casting
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Solution Overview
Problem
Existing feeder elements for metal casting have large attachment surfaces, which are not suitable for modern filigree cast parts, and thin-walled designs can lead to breaking edges or inadequate cooling, disrupting the casting process.
Innovation Solution
A two-part feeder element with a tubular element and an adapter element, where the tubular element has a maximum wall thickness of 1.5 mm and is frictionally connected to the adapter element with path limiters, allowing controlled insertion and preventing breaking during compression forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the attachment surface of the feeder element is reduced to accommodate filigree cast parts, then the suitability for modern cast parts is improved, but the passage opening for liquid metal must not be arbitrarily small which would compromise feeding behavior
Solution Approach 1:
The feeder element is divided into multiple components: a tubular element with reduced wall thickness (1.5-3 mm) that provides the passage opening, and a separate support structure that provides the attachment surface. This segmentation allows the passage opening dimensions to be optimized for feeding behavior while the support structure provides adequate attachment area for filigree cast parts.
Solution Approach 2:
Different regions of the feeder element have different wall thicknesses optimized for their specific functions: the tubular element has reduced wall thickness (1.5-3 mm) to maintain adequate passage opening for liquid metal flow, while other regions have increased wall thickness to provide structural support and attachment surface area. This local differentiation resolves the contradiction between passage size and attachment surface area.
2Area of stationary object
If the feeder element is designed with thin walls to reduce attachment surface footprint, then the footprint is reduced, but cooling of the feeder neck may have a disruptive effect
Solution Approach 1:
The feeder element features non-uniform wall thickness distribution: thin-walled sections (1.5-3 mm) where reduced footprint is critical, and thick-walled sections where thermal insulation is needed to prevent feeder neck cooling. This local quality differentiation allows simultaneous optimization of footprint and temperature control.
Solution Approach 2:
The feeder element is segmented into functional zones with different thermal requirements: a thin-walled tubular section for passage and footprint reduction, and a thick-walled support section for thermal insulation. This segmentation enables independent optimization of each zone's wall thickness for its specific function.
3Ease of manufacture
If a thin-walled tubular element is free at its end facing the casting, then the design is simplified, but the desired formation of a breaking edge is not guaranteed
Solution Approach 1:
The tubular element is pre-formed with specific geometric features (reduced wall thickness of 1.5-3 mm, specific length-to-diameter ratio) that predispose it to break at the desired location during the casting process. This preliminary design ensures reliable breaking edge formation without requiring complex post-processing or adjustment.
Solution Approach 2:
The wall thickness parameter of the tubular element is specifically optimized to 1.5-3 mm, which is thin enough to facilitate breaking edge formation but thick enough to maintain structural integrity during assembly. This parameter optimization resolves the contradiction between design simplicity and manufacturing precision.
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
Ensures reliable breaking off of the feeder near the casting and prevents undesirable breaking, maintaining acceptable feeding behavior while withstanding compression forces.
Implementation Method 1
an adapter element with an opening into which the tubular element is inserted in such a way that it is frictionally connected to the adapter element
Data Source
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AI summary
The invention relates to a feeder element (10) for the use during the casting of metals in casting molds, comprising a first end (14) for placing on a mold model (12) and a second end (16) opposite thereof for connecting to or for carrying an upper feeder part (18). The feeder element (10) comprises a passage (20) for liquid metal, extending from the first to the second end (14, 16), wherein the feeder element (10) is designed as two or multiple parts and comprises or is made of: (i) a tube-like element (22) forming the first end (14) of the feeder element (10), having a maximum wall thickness of 1.5 mm, (ii) an adapter element (24) with an opening into which the tube-like element (22) is inserted such that it is frictionally connected with the adapter element. The adapter element (24) comprises one or more displacement limiters (26) for delimiting the insertion path for the tube-like element (22). Said displacement limiters are designed such that the outer surface (46) of the edge region of the tube-like element (22) opposite of the first end (14) at the maximum width of the insertion within the adapter element (24) is present free on the entire circumference or in sections of the circumference.