Feeder Insert Outer Contours for Higher Modulus Casting
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Solution Overview
Problem
Existing feeder inserts in metal casting face challenges in achieving a higher modulus with the same feeder mass and cavity volume, particularly due to complex shapes and difficult spatial positioning, and issues with heat transfer and gas venting during the casting process.
Innovation Solution
A feeder insert design featuring a feeder body with outwardly directed outer contour projections and/or recesses, which create thermal bridges and insulating air gaps, utilizing exothermic material and a casing to enhance insulation and energy transfer efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air cavities are arranged inside the feeder body to increase insulation, then the insulating effect is improved, but the thermal energy generated by exothermic reaction is insulated and transferred to the molding material instead of being retained for replenishment
Solution Approach 1:
The patent replaces solid air cavities with a porous ceramic material that provides insulation while allowing thermal energy to be retained and utilized. The porous structure offers thermal resistance similar to air cavities but maintains thermal connectivity for energy retention during exothermic reaction.
Solution Approach 2:
The patent uses a composite structure combining exothermic material with a porous ceramic insulating material. This composite approach allows simultaneous achievement of insulation and thermal energy retention, resolving the contradiction between insulating effect and thermal energy loss.
2Temperature
If a shell made of insulating refractory material is used to enclose the feeder body, then the insulating effect is improved, but the manufacturing cost increases
Solution Approach 1:
The patent replaces the expensive solid refractory shell with a porous ceramic material that can be directly integrated into the feeder body. This material provides comparable insulation at lower cost and simplifies manufacturing by eliminating the need for a separate shell component.
Solution Approach 2:
The patent merges the insulating function into the feeder body itself by incorporating porous ceramic material during the same manufacturing process, rather than using a separate refractory shell. This integration reduces manufacturing steps and costs while maintaining insulation performance.
3Quantity of substance
If the feeder body uses a larger module to compensate for volume deficits, then the feeding capability is improved, but the spatial positioning becomes more difficult and the casting complexity increases
Solution Approach 1:
The patent changes the thermal parameters of the feeder body by incorporating exothermic material and porous ceramic insulation, which enhances feeding capability through improved heat retention rather than increasing module size. This allows effective feeding with a more compact, easier-to-position feeder body.
Solution Approach 2:
The patent utilizes the phase transition and exothermic reaction of the metallic powder material to generate and retain thermal energy during the casting process. This thermal mechanism enhances feeding capability without requiring a larger module, thereby simplifying spatial positioning.
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 design increases the modulus of the feeder insert while maintaining the same weight or volume, effectively utilizing exothermic energy and reducing heat transfer to the mold, thereby improving the casting process.
Implementation Method 1
the exothermic material should comprise an oxidizable metal and an oxidizing agent capable of generating an exothermic reaction
Implementation Method 2
components of an insulating refractory material to the material mixture, resulting in an exothermic-insulating material mixture
Data Source
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AI summary
The present invention relates to a feeder insert for insertion into a casting mold used in metal casting, comprising a feeder body (1) made of an insulating and/or exothermic feeder material, having: - a circumferential side wall (2), wherein the side wall (2) has an outwardly directed outer contour (3), - a feeder cavity (4) bounded at least by the side wall (2) for receiving liquid metal, and - a feeder opening (5) for connecting the feeder cavity (4) to a mold cavity of the casting mold during the casting process, wherein the outer contour (3) has a plurality of outer contour projections (6) and/or outer contour recesses.