Masked Powder Deposition for Multi-Material Layer Control
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Solution Overview
Problem
Existing methods for creating three-dimensional objects using laser treatment of powder materials struggle with controlling the distribution of particles in multiple spatial directions, limiting the production of thin layers with complex geometries and the integration of multiple materials in a single layer.
Innovation Solution
A method involving a mask with predefined passages to deposit and laser-treat different powder materials separately, allowing for precise control over the geometry and thickness of each material area within a single layer, using a metal mesh mask and laser stations to form and calibrate the layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If successive powder beds are generated using a scraper or roller, then a three-dimensional object can be formed by laser treatment, but the trajectories and positions of powder particles cannot be controlled in the plane of the layer
Solution Approach 1:
The mask is divided into multiple passages, each dedicated to a specific powder material. This segmentation allows independent control of each material's deposition location and trajectory, enabling precise particle distribution control without requiring complex overall system complexity.
Solution Approach 2:
A mask is introduced as an intermediary component between the powder sources and the substrate. This mask mediates the deposition process by guiding powder particles through its passages, thereby controlling particle trajectories and positions without direct mechanical manipulation of each particle.
2Adaptability or versatility
If multiple powder materials are deposited in a single layer, then material integration is achieved, but partial or total mixture of materials occurs
Solution Approach 1:
The mask is segmented into multiple distinct passages, each assigned to a specific powder material. This segmentation ensures that each material is deposited only through its designated passage, preventing mixing while enabling the integration of multiple materials in a single layer.
Solution Approach 2:
Different regions of the mask have different local qualities - each passage is designed with specific geometry and positioning optimized for its assigned material. This local differentiation ensures precise material separation and controlled distribution patterns for each material type.
3Adaptability or versatility
If powder is projected locally onto a mounting by spray gun, then multiple different materials can be deposited in a single layer, but the geometric precision of material areas is insufficient
Solution Approach 1:
The mask serves as a precision intermediary that replaces the spray gun approach. Instead of relying on spray projection geometry, the mask's fixed passages provide precise geometric control over where each material is deposited, significantly improving the geometric precision of material areas.
Solution Approach 2:
The mask passages are pre-configured with specific geometries and positions before the deposition process begins. This preliminary action of designing the passage structure ensures that subsequent material deposition automatically achieves the desired geometric precision without requiring real-time adjustment.
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
Enables the production of three-dimensional objects with complex geometries and integrated multiple materials in a single layer, achieving precise geometric control and uniform thickness across areas, enhancing functional integration such as thermal conductivity, electrical properties, and surface characteristics.
Implementation Method 1
a film made of a first material is deposited on the mounting, via the passage, said first material deposited in this way is treated, with a laser beam, so as to form a first area
Implementation Method 2
The term laser treatment refers to sintering or fusion
Data Source
AI summary
According to said method, a first passage (28) having a predefined geometry is provided in a mask (4), the mask is placed in such a way that said first passage is located facing a mounting (26), a film made of a first material (A) is deposited on the mounting through the passage, and said first thus-deposited material is treated by a laser beam so as to form a first area that is made up of the first material and belongs to a first layer of said object. Then the above operations are repeated with a second material so as to form an adjacent area made up of said second material that belongs to the same layer.