Additive Manufacturing Patterns Using Fusing Agent Gap Areas
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Solution Overview
Problem
Current additive manufacturing techniques face challenges in generating three-dimensional objects with precise patterns and colors without altering the mechanical properties of the build material, as existing methods often require multi-color printing or additional materials, which increase complexity and cost.
Innovation Solution
The method involves using a fusing agent and a detailing agent in additive manufacturing to selectively apply energy, where the fusing agent is applied to certain areas of the build material, and the detailing agent is used to modify the fusion process, allowing for pattern creation without altering the material's properties, by ensuring the patterned areas fuse through thermal bleed from the surrounding fusing agent areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multi-color printing or additional materials are used to create patterns, then pattern visibility and color variety are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The build material is divided into different regions with different fusing agent concentrations. The pattern areas receive fusing agent at a first concentration while non-pattern areas receive fusing agent at a second concentration, creating visual contrast through material property differences rather than multiple colors or materials.
Solution Approach 2:
Different regions of the build material are given different local properties through varying fusing agent concentrations. Pattern regions have one concentration level that results in a first visual appearance, while non-pattern regions have another concentration level that results in a different visual appearance, enabling pattern creation without multi-color printing.
2Illumination intensity
If multi-color printing or additional materials are used to create patterns, then pattern visibility and color variety are improved, but manufacturing cost increases
Solution Approach 1:
The fusing agent serves multiple functions: it enables selective solidification of build material and simultaneously creates visual patterns through concentration-dependent visual properties. This eliminates the need for separate pattern-making materials or multi-color printing systems, reducing manufacturing cost while maintaining pattern visibility.
Solution Approach 2:
The build material and fusing agent combination provides a uniform base material system that can produce different visual appearances through concentration variations alone. This homogeneous material approach avoids the cost and complexity of multiple materials or colors while achieving the desired pattern visibility.
3Adaptability or versatility
If fusing agent concentration is varied to create patterns, then pattern creation capability is improved, but control precision requirements increase
Solution Approach 1:
The system creates patterns by changing the concentration parameter of the fusing agent rather than using multiple materials or complex multi-color printing processes. This single-parameter approach (concentration variation) provides pattern creation capability while being simpler to control than multi-parameter systems would require.
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 creation of objects with patterns that match the color of the build material, providing visual contrast without affecting the mechanical properties, reducing the need for multi-color printing and additional materials, thus simplifying the process and reducing costs.
Implementation Method 1
the solidification method may include heating the layers of build material to cause melting in selected sub-regions
Implementation Method 2
the patterned areas fuse through thermal bleed from the surrounding fusing agent areas
Data Source
AI summary
In an example, a method includes operating, by a processor, on object model data and operating, on a processor, on pattern data. The object model data describes at least part of an object to be generated in additive manufacturing and the pattern data describes an object pattern intended to be formed on at least a portion of the part of the object to be generated in additive manufacturing. The method includes determining, by a processor, control data to control a print agent applicator to apply a pattern of fusing agent onto a part of a layer of build material. The pattern of fusing agent comprises a fusing agent area and a gap area that lacks fusing agent. The gap area corresponds to the object pattern such that no fusing agent is applied to a part of the layer of build material that corresponds to the object pattern.