Exothermic Feeder Insulating Shell Alignment
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Solution Overview
Problem
Existing metal feeders for casting molds face issues with the feeder foot not being centrally attached, leading to problems during molding, such as the breaker core or metal disc falling off or tearing off due to lack of accuracy, which can render the casting mold unusable.
Innovation Solution
A method where the feeder body made of exothermic material and the feeder foot are surrounded by an insulating refractory material, with the outer shell extending under the feeder foot to fix it without the need for separate attachment, ensuring central alignment and reducing heat dissipation, thus preventing gas formation from adhesives during the casting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the feeder foot is attached separately to the feeder body, then the feeder can be assembled, but the feeder foot is not attached centrally leading to problems during molding
Solution Approach 1:
The feeder foot and feeder body are formed as a single integrated component through the shot molding process, eliminating separate attachment steps and ensuring precise central alignment by design rather than by assembly
Solution Approach 2:
The feeder foot is pre-positioned and integrated into the feeder body during the shot molding process itself, ensuring correct central alignment is built-in from the start rather than requiring subsequent adjustment or attachment operations
2Reliability
If adhesives are used to attach the feeder foot, then the feeder foot can be fixed, but gas formation occurs during the casting process
Solution Approach 1:
The adhesive substance is completely eliminated from the system by using an integrated feeder foot design, thereby removing the source of gas formation during the casting process while maintaining secure fixation through mechanical integration
Solution Approach 2:
The invention replaces the adhesive (a consumable material that degrades and produces gas) with a permanent structural integration achieved through shot molding, creating a durable adhesive-free connection that lasts throughout the casting process
3Reliability
If the outer shell does not extend under the feeder foot, then the manufacturing process is simpler, but the feeder foot is not securely attached
Solution Approach 1:
The outer shell is integrated with the feeder foot and feeder body as a single molded structure, where the shell naturally extends under the feeder foot as part of the unified component design, providing secure attachment without adding separate structural elements
Solution Approach 2:
The outer shell serves multiple functions simultaneously: it provides structural support, secures the feeder foot through its extended configuration, and is formed in a single shot molding operation, thereby achieving secure attachment without proportionally increasing device complexity
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 solution ensures the feeder foot is securely attached to the feeder body, maintaining central alignment, reducing heat dissipation, and eliminating the need for adhesives, thereby preventing gas formation and improving the feeder's performance and usability in casting molds.
Implementation Method 1
the outer shell made of insulating material stores the heat generated by the liquid metal and the exothermic reaction with the feeder body
Implementation Method 2
the feeder body consists of exothermic material and is surrounded on its outside at least in regions by an outer shell consisting of an insulating refractory material
Implementation Method 3
the insulating material shot into the mold cavity of the shooting mold leaves a space between the feeder foot and the bottom of the mold cavity at least on part of the circumference of the feeder foot and itself fills the gap extending over at least part of the height of the feeder foot
Data Source
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AI summary
The invention relates to a method for producing a feeder configured for use in a casting mold used for casting metals, wherein the feeder has a feeder body (14) enclosing a feeder cavity (15) and a through opening (19) in its base region (18) for connecting the feeder cavity (15) to the casting mold and the feeder body (14) consists of an exothermic material and is enclosed on its outer side at least in regions by an external shell (27) consisting of insulating refractory material, and wherein the feeder is provided with a feeder foot (20) arranged externally in its base region (18) and having an opening (21) flush with the through opening (19). The feeder is characterized in that the feeder body (14) produced in a first step in a conventional method from an exothermic material is used together with the feeder foot (20) associated with the base region (18) to form the external shell (27) into an injection mold (10) having a mold cavity (30) and feeder body and feeder foot are shot simultaneously with the insulating material, wherein the feeder body (14) including the feeder foot (20) is positioned in such a manner that the insulating material shot into the mold cavity (30) of the injection mold (10) fills in a gap (25) left between the feeder foot (20) and the base of the mold cavity (30) at least one part of the circumference of the feeder foot (20) and extending over at least a part of the height of the feeder foot (20), and the shot external shell (27) thereby extends at least partially under the feeder foot (20) with the exception of its opening (21) and is attached to the base region (18) of the feeder body (14) without the use of auxiliary means.