3D Printing Epoxy Mold Compound Parts
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Solution Overview
Problem
Current 3D printing technologies face limitations in producing parts suitable for high-temperature and harsh environments without the need for mold chests and lead frames, and struggle to tailor parts for specific fatigue resistance, elasticity, and thermal conductance requirements.
Innovation Solution
The method employs Multi Jet Fusion (MJF) using an epoxy mold compound (EMC) as build material, which is selectively fused by a radiation-absorbing fusing agent converting electromagnetic radiation into thermal energy, allowing for the creation of parts that can withstand harsh conditions and meet customized performance requirements without the need for traditional mold protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional machining processes are used to create parts for high-temperature environments, then parts can be produced with established materials, but the process requires removal of material and cannot produce parts without mold chests and lead frames
Solution Approach 1:
The patent changes the material parameters by using epoxy mold compound, a material traditionally used for molding but not for 3D printing. This material parameter change enables parts to withstand high temperatures and harsh environments while allowing direct 3D printing without traditional mold chests and lead frames, thus resolving the contradiction between manufacturing simplicity and environmental adaptability
Solution Approach 2:
The patent utilizes the phase transition properties of epoxy mold compound during the 3D printing process. The material transitions from solid powder to a fused state through selective fusion, enabling complex geometries to be created directly without traditional machining or molding processes, thereby achieving both ease of manufacture and versatility in harsh environments
2Ease of manufacture
If conventional 3D printing materials are used, then printing processes can be simplified, but parts cannot meet specific fatigue resistance, elasticity, and thermal conductance requirements
Solution Approach 1:
The patent employs epoxy mold compound as a composite material that combines the benefits of traditional molding materials with 3D printing capabilities. This composite material provides tailored fatigue resistance, elasticity, and thermal conductance properties while maintaining printability, thus resolving the contradiction between manufacturing simplicity and part reliability
Solution Approach 2:
The patent enables local quality customization by selectively varying the composition and properties of epoxy mold compound in different regions of the printed part. This allows specific areas to have optimized fatigue resistance, elasticity, or thermal conductance based on functional requirements, while the overall printing process remains simplified
3Reliability
If epoxy mold compound is used as build material, then parts can withstand high temperatures and harsh environments, but the material requires selective fusion through radiation-absorbing agents
Solution Approach 1:
The patent introduces a radiation-absorbing fusing agent as an intermediary substance that enables selective fusion of epoxy mold compound. This agent absorbs electromagnetic radiation and converts it to thermal energy, locally heating and fusing the material without requiring complex high-temperature equipment throughout the entire system, thus resolving the contradiction between part reliability and system 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 approach enables the production of 3D parts that are durable in high-temperature and corrosive environments, with tailored properties such as reduced thermal expansion, improved thermal conductance, and enhanced elasticity, without the use of mold chests or lead frames, thus expanding the applicability of 3D printing in demanding applications.
Implementation Method 1
selectively fused by a radiation-absorbing fusing agent converting electromagnetic radiation into thermal energy
Data Source
Figure 1
Figure 2~3
AI summary
In a three-dimensional printing method example, an epoxy mold compound build material is applied. A fusing agent is selectively applied on at least a portion of the epoxy mold compound build material. The epoxy mold compound build material is exposed to energy, thereby fusing the portion of the epoxy mold compound build material in contact with the fusing agent to form a layer.