3D Print Slice Layout Using Sacrificial Geometry for Uniform Layers
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Solution Overview
Problem
In additive manufacturing, variations in slice areas across layers lead to uneven heat generation, shrinkage, density differences, and poor surface quality due to varying building times, resulting in inconsistent builds and dimensions.
Innovation Solution
A method and system that calculate and plan a 3D layout incorporating a sacrificial design with a linear change in slice areas, which when combined with the desired design, reduces the initial slice area differential, ensuring more consistent building times and improved part quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the additive manufacturing process builds objects layer by layer with varying slice areas, then the building time varies greatly across layers, but this leads to uneven heat generation and poor build quality
Solution Approach 1:
A sacrificial design is introduced as an intermediary element that compensates for variations in the desired design's slice areas. The sacrificial design is strategically placed and sized to equalize the total slice area across layers, thereby balancing building time and heat generation without modifying the desired design itself.
Solution Approach 2:
The cross-sectional area of the sacrificial design is specifically engineered to have a linear change pattern that counterbalances the non-linear variations in the desired design's slice areas. This parameter optimization ensures that the combined slice area remains relatively constant across all layers, resolving the time and quality inconsistency.
2Quantity of substance
If layers with large slice areas are printed, then more material is processed, but this causes greater heat generation and shrinkage issues
Solution Approach 1:
The sacrificial design acts as a thermal buffer by adding material in layers where the desired design has small cross-sectional areas. This equalizes the total material volume processed per layer, preventing excessive heat generation in layers with large desired design areas while maintaining adequate material presence for thermal stability.
3Productivity
If the building time varies significantly between layers, then productivity is affected, but this also results in density differences and color variations
Solution Approach 1:
The sacrificial design is configured to create equipotential conditions across all layers by ensuring that the total slice area (desired design + sacrificial design) remains substantially constant. This equalization of processing conditions eliminates the root cause of density variations, color differences, and surface quality issues while maintaining consistent building time.
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 method achieves equalized sintered volumes across layers, enhancing part characteristics by minimizing heat generation disparities and surface irregularities, resulting in improved build quality and consistency.
Implementation Method 1
The process involves sintering or melting the material to bond particles together, forming a solid structure
Implementation Method 2
sintering or melting the material to bond particles together
Data Source
AI summary
Methods and systems for additive manufacturing are provided. An exemplary method includes calculating a slice area distribution of a desired 3D design including slice areas of slices of the desired design, wherein the slices have an initial slice area differential. The method further includes obtaining a slice area distribution of a sacrificial 3D design comprising slice areas of slices of the sacrificial design. The method includes planning a 3D layout of the desired and sacrificial design, wherein at each respective parallel plane in the layout a total slice area includes a respective slice area of the desired design and a respective slice area of the sacrificial design, and wherein the layout has a total slice area differential that is less than the initial slice area differential. Also, the method includes generating instructions for printing slices of the desired design and the sacrificial design according to the layout.