Additive Manufacturing Layer Heating for Self-Sintering
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Solution Overview
Problem
In additive manufacturing, reducing manufacturing time often compromises the material properties of three-dimensional articles, necessitating a method that minimizes time while maintaining or improving material characteristics.
Innovation Solution
The method involves depositing new layers of powder material onto a support surface while heating, allowing for self-sintering and potentially eliminating the need for preheating, using the same or different energy beams for heating and fusion, and optimizing energy beam placement to reduce unnecessary heating and enhance bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If heating is applied during the powder application process, then manufacturing time is reduced and material properties are improved, but device complexity increases due to additional heating control requirements
Solution Approach 1:
The patent combines the heating function with the existing energy beam used for fusion. The same energy beam that fuses the powder material also provides preheating during the deposition process, eliminating the need for a separate heating system and reducing device complexity while improving productivity
Solution Approach 2:
The energy beam performs preliminary heating of the powder material during deposition before the actual fusion process. This preheating action prepares the material in advance, reducing total processing time and enabling faster manufacturing while maintaining material properties
2Use of energy by moving object
If local heating is applied just in front of the powder to be distributed, then energy consumption is reduced through self-sintering, but temperature control precision must be increased
Solution Approach 1:
The energy beam applies heating locally to specific regions of the powder material during deposition, creating zones with different thermal states. This localized heating enables self-sintering in targeted areas while consuming less overall energy, and the control system manages temperature precision through spatially selective energy application
3Device complexity
If the same energy beam is used for both heating and fusion, then device complexity is reduced, but process control difficulty increases
Solution Approach 1:
The energy beam parameters (power, duration, position) are dynamically adjusted during the deposition process to perform different functions. The same beam provides gentle heating during powder application and intense fusion when needed, with real-time parameter modulation enabling dual functionality while maintaining manageable control 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 reduces manufacturing time while maintaining or improving the material properties of the three-dimensional articles by enabling self-sintering and efficient energy use, resulting in faster fusion processes and more predictable microstructures.
Implementation Method 1
heating the new layer of powder material and/or the support surface while depositing the new layer of powder material
Implementation Method 2
the new powder layer which is distributed over the previous layer or support layer may self-sinter
Implementation Method 3
a high energy beam for delivering energy to the powder whereby fusion of the powder takes place
Data Source
AI summary
The present invention relates to a method for forming a three-dimensional article through successively depositing individual layers of powder material that are fused together so as to form the article, the method comprising the step of heating a first portion of a support surface while depositing a layer of powder material on a second portion of the support surface.