Thin-Walled Refractory Metal Casting Insert for Heat Dissipation
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Solution Overview
Problem
Casting inserts for die casting molds face challenges in efficiently managing heat dissipation and material utilization, as existing solid inserts are costly and do not allow for optimal heat storage or spatial flexibility in cooling duct configurations.
Innovation Solution
A thin-walled casting insert with a liquid-phase-sintered refractory metal alloy, featuring a hollow structure with a cooling duct and optional support structure, where the wall thickness is less than 25% of the diameter, allowing for efficient heat dissipation and material savings, and produced using additive manufacturing for complex geometries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If solid casting inserts are used, then thermal conductivity and heat dissipation are improved, but material cost and weight increase
Solution Approach 1:
The casting insert is segmented into a hollow structure with thin walls, dividing the solid material into a framework that encloses an internal cavity. This segmentation maintains thermal pathways for heat dissipation while reducing overall material quantity, achieving both heat transfer efficiency and material savings.
Solution Approach 2:
The casting insert employs thin-walled structures with wall thickness less than 25% of the diameter, creating flexible shell-like formations that provide sufficient thermal conductivity for heat dissipation while minimizing material usage. The thin walls maintain structural integrity and thermal performance without requiring solid bulk material.
2Shape
If cooling ducts are formed by cross bores and stoppers, then angled profiles are achieved, but device complexity and manufacturing steps increase
Solution Approach 1:
The cooling ducts are merged with the casting insert wall structure itself, forming an integrated design where the ducts are configured within or on the wall rather than being separate components. This merging eliminates the need for separate stoppers and complex assembly steps, reducing manufacturing complexity while achieving the required angled profiles.
Solution Approach 2:
The cooling ducts transition from simple linear bores to three-dimensional configurations that extend within and on the casting insert wall. This dimensional change allows complex angled profiles to be achieved directly in the structure, eliminating the need for multiple machining operations and stoppers.
3Quantity of substance
If wall thickness is reduced to less than 25% of diameter, then material cost is reduced, but mechanical strength and structural integrity may worsen
Solution Approach 1:
The thin-walled casting insert utilizes refractory metal alloys with exceptional strength-to-weight ratios, including tungsten-heavy metal alloys and TZM molybdenum alloys. These composite materials provide the necessary mechanical strength and structural integrity even at reduced wall thicknesses, enabling material savings without compromising performance.
Solution Approach 2:
The wall thickness parameter is optimized to be less than 25% of the diameter, representing a significant change from conventional thick-walled designs. This parameter change is compensated by selecting materials with enhanced mechanical properties, maintaining structural integrity while achieving substantial material reduction.
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 configuration enhances heat dissipation, reduces material costs, and allows for more flexible cooling duct arrangements, leading to improved thermal performance and reduced cycle times in die casting processes.
Implementation Method 1
a casting insert wall (2) formed essentially from a liquid-phase-sintered refractory metal alloy
Implementation Method 2
at least one cooling duct (4) that is different from the cavity (3) and which at least in sections is configured within the cavity (3) and/or which at least in sections is configured within the casting insert wall (2)
Data Source
AI summary
A casting insert includes a casting insert wall formed substantially of a liquid-phase-sintered refractory metal alloy, a cavity formed by the casting insert wall, and at least one cooling duct, which is different from the cavity and which is formed at least partly within the cavity and/or which is formed at least partly within the casting insert wall. The casting insert wall has a wall thickness which can be defined as a normal distance between a point of the casting insert wall which faces the cavity and a point on an outer surface of the casting insert wall. The wall thickness is, at least in sections, less than 25% of a diameter of the casting insert.