Forming Die with Embedded Thermal Inserts
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Solution Overview
Problem
Conventional dies face challenges in uniform heating due to thickness variations, leading to incomplete formation of materials and excessive residual stresses in formed parts, as well as reduced die longevity.
Innovation Solution
A die design featuring a base with embedded inserts of varying thermal conductivities, strategically positioned to span the thickness of the base, ensuring uniform heat distribution across the part interface surface, thereby reducing thermal gradients and enhancing heat transfer efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the die base has uniform thickness, then manufacturing is simpler, but heating uniformity deteriorates due to thickness variations being necessary for part formation
Solution Approach 1:
The die base incorporates regions of different thicknesses at specific locations to provide localized thermal management. Thinner regions allow faster heat transfer to areas requiring higher temperatures, while thicker regions provide thermal mass and slower heat transfer to areas requiring lower temperatures, achieving uniform heating across the entire die surface despite structural thickness variations
Solution Approach 2:
The die base is constructed as a composite structure combining materials with different thermal conductivities in specific regions. This allows the die to simultaneously provide structural support and optimized thermal distribution, with high thermal conductivity materials in regions needing rapid heat transfer and lower thermal conductivity materials in regions needing heat retention
2Manufacturing precision
If the die thickness varies to accommodate part formation, then part formation capability improves, but heating uniformity deteriorates leading to incomplete formation and residual stresses
Solution Approach 1:
The die base incorporates regions of different thicknesses at specific locations to provide localized thermal management. Thinner regions allow faster heat transfer to areas requiring higher temperatures, while thicker regions provide thermal mass and slower heat transfer to areas requiring lower temperatures, achieving uniform heating across the entire die surface despite structural thickness variations
Solution Approach 2:
The die design strategically varies thermal conductivity parameters and thickness parameters across different regions of the die base. By changing these physical parameters locally, the die compensates for thickness variations and achieves uniform heat distribution, preventing incomplete formation and residual stresses in the formed parts
3Manufacturing precision
If thermal gradients are reduced through uniform heating, then residual stresses decrease and part quality improves, but die design complexity increases due to need for thermal management features
Solution Approach 1:
The die base incorporates regions of different thicknesses at specific locations to provide localized thermal management. Thinner regions allow faster heat transfer to areas requiring higher temperatures, while thicker regions provide thermal mass and slower heat transfer to areas requiring lower temperatures, achieving uniform heating across the entire die surface despite structural thickness variations
Solution Approach 2:
The die base is constructed as a composite structure combining materials with different thermal conductivities in specific regions. This allows the die to simultaneously provide structural support and optimized thermal distribution, with high thermal conductivity materials in regions needing rapid heat transfer and lower thermal conductivity materials in regions needing heat retention
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 solution promotes complete formation of parts with reduced residual stresses and extends the life of the die by ensuring uniform heat transfer and minimizing thermal gradients.
Implementation Method 1
a heat platen thermally coupled with the heat-platen interface surface of the base and configured to supply heat to the base and the inserts
Implementation Method 2
The inserts are made of a second material having a second thermal conductivity. The first thermal conductivity is different than the second thermal conductivity. The inserts extend from the heat-platen interface surface to the part interface surface such that the inserts span an entirety of the thickness of the base
Data Source
Figure 1~2
Figure 3A~3B
Figure 4~5
AI summary
Disclosed herein is a die for forming a part. The die comprises a base, comprising a heat-platen interface surface and a part interface surface, and wherein the heat-platen interface surface and the part interface surface are separated by a thickness of the base. The die also comprises inserts, embedded within and circumferentially closed by the base, spaced apart from each other, and extending in a first direction from the heat-platen interface surface toward the part interface surface. The base is made of a first material having a first thermal conductivity. The inserts are made of a second material having a second thermal conductivity. The first thermal conductivity is different than the second thermal conductivity.