Die-Casting Mold Recessed Grooves for Heat Sink Pin Degassing
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Solution Overview
Problem
The production of heat sinks with multiple heat sink pins using conventional die-casting molds requires numerous porous material members for degassing, leading to increased costs.
Innovation Solution
A die-casting mold design featuring first and second mold inserts with through-holes and recessed grooves that allow gas passage while preventing molten metal from flowing between them, eliminating the need for specialized degassing components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If porous material members are used for degassing in each heat sink pin, then gas can be discharged effectively, but the number of parts increases and production cost increases
Solution Approach 1:
The invention merges the degassing function from separate porous material members into the mold insert structure itself. The mold insert includes through-holes and recessed grooves that provide gas discharge pathways, eliminating the need for separate porous material members while maintaining effective degassing throughout the molding process
Solution Approach 2:
The mold insert is designed to perform multiple functions: molding the heat sink pins through through-holes and simultaneously providing degassing functionality through recessed grooves. This multi-functional design eliminates the need for specialized porous material members, reducing part count while maintaining both molding and degassing effectiveness
2Productivity
If the number of heat sink pins is increased, then the heat sink performance is improved, but the number of porous material members required increases proportionally
Solution Approach 1:
The degassing function is merged into the mold insert structure with recessed grooves that provide continuous gas discharge pathways. This allows the system to handle increased numbers of heat sink pins without requiring proportional increases in separate porous material members, as the integrated grooves serve the entire molding area
Solution Approach 2:
The invention introduces a new structural dimension by adding recessed grooves to the mold insert surface. These grooves create additional gas discharge pathways in a different spatial arrangement, enabling effective degassing across multiple heat sink pins without requiring separate porous members for each pin
3Manufacturing precision
If through-holes are filled with molten metal material, then heat sink pins are molded effectively, but gas trapped in through-holes cannot be discharged
Solution Approach 1:
The recessed grooves act as intermediary gas discharge pathways between the through-holes and the exterior. Gas trapped in the through-holes during molten metal filling can escape through the recessed grooves, which serve as intermediate channels that do not interfere with the molding function of the through-holes while effectively removing harmful gas
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
Enables efficient production of heat sinks with multiple heat sink pins without the use of specialized degassing parts, reducing production costs and simplifying the mold configuration.
Implementation Method 1
the recessed grooves preventing the melted metal material from passing therethrough but allowing the gas to pass therethrough
Data Source
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AI summary
A die-casting mold 10 includes a first mold insert 50 located on the side of a fixed die 20, and a second mold insert 70 located on the side of a movable die 30. The first mold insert 50 includes first through-holes 56 filled with a melted metal material to be used to mold a plurality of heat sink pins 105. The second mold insert 70 includes second through-holes 76 usable to discharge gas in a molding space 15. At least one of a first facing surface 53 and a second facing surface 53 includes recessed grooves 80 formed therein, the recessed grooves 80 being communicated with the first through-holes 56 and the second through-holes 76 when the first mold insert 50 and the second mold insert 70 are located in place, and the recessed grooves 80 preventing the melted metal material from passing therethrough but allowing the gas to pass therethrough. As seen in a die moving direction P, the plurality of first through-holes 56 do not overlap at least a portion of the plurality of second through-holes 76.