3D Printing Matte Textures via Sacrificial Ink Viscoelasticity
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Solution Overview
Problem
Conventional methods for manufacturing three-dimensional shaped articles struggle to achieve finely detailed, matte-toned textures, particularly in lamination techniques, due to limitations in rendering complex surfaces and internal structures without molds.
Innovation Solution
A three-dimensional shaped article manufacturing method using an apparatus that laminates layers formed by discharging and curing inks, including a substantive section-forming ink and a sacrificial layer-forming ink, where the sacrificial layer-forming ink has a lower viscoelasticity than the substantive section-forming ink during curing, creating a matte-toned surface through controlled wrinkling and layer support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional lamination methods are used to manufacture three-dimensional shaped articles, then production speed and cost-effectiveness are improved, but the ability to render finely detailed matte-toned textures deteriorates
Solution Approach 1:
The patent applies parameter changes by controlling the viscoelasticity of the sacrificial layer-forming ink to be lower than that of the substantive section-forming ink during curing. This parameter difference enables the sacrificial layer to deform and create matte-toned textures while the substantive layer maintains its structural integrity and detail fidelity, thus resolving the contradiction between production efficiency and texture rendering precision
Solution Approach 2:
The sacrificial layer acts as an intermediary element that is discharged alongside the substantive section-forming ink. This intermediary layer temporarily supports the substantive layer during manufacturing and then is removed to reveal the desired matte-toned texture, enabling fine detail rendering without compromising production speed
2Device complexity
If conventional lamination methods are used to manufacture three-dimensional shaped articles, then manufacturing complexity is reduced by avoiding molds, but the ability to create complex surface features and internal structures deteriorates
Solution Approach 1:
The patent segments the manufacturing process into two distinct functional components: substantive section-forming ink that creates the structural framework and sacrificial layer-forming ink that creates surface features. This segmentation allows complex surface features and internal structures to be generated through controlled deposition and curing of these separate components, maintaining low manufacturing complexity while achieving high surface feature complexity
Solution Approach 2:
By changing the viscoelasticity parameter of the sacrificial layer-forming ink to be lower than that of the substantive section-forming ink, the patent enables the sacrificial layer to flow and conform to complex geometries during curing, thereby creating intricate surface features and internal structures without requiring complex molding processes
3Manufacturing precision
If sacrificial layer-forming ink with lower viscoelasticity is used during curing, then matte-toned texture formation is improved, but the mechanical strength of the cured article may deteriorate
Solution Approach 1:
The patent carefully controls the viscoelasticity parameter of the sacrificial layer-forming ink during the curing process, making it lower than that of the substantive section-forming ink. This parameter control enables matte-toned texture formation through controlled deformation while the substantive layer, with its higher viscoelasticity, maintains the mechanical strength and structural integrity of the final article
Solution Approach 2:
The patent creates a composite structure during manufacturing where the substantive section-forming ink and sacrificial layer-forming ink coexist with different viscoelasticity properties. The substantive layer provides mechanical strength while the sacrificial layer provides texture formation capability, and this composite approach is maintained through the curing process to achieve both matte-toned texture and adequate mechanical strength
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 method enables the stable and efficient production of three-dimensional shaped articles with matte-toned textures, improving dimensional accuracy and aesthetic appeal by allowing for complex surface features and internal structures without the need for molds, while maintaining mechanical strength and durability.
Implementation Method 1
a curing unit configured to cure both the substantive section-forming ink and the sacrificial layer-forming ink
Data Source
AI summary
A three-dimensional shaped article manufacturing apparatus is an apparatus for manufacturing a three-dimensional shaped article by laminating layers formed by discharging and curing inks including a curable resin. The apparatus includes a first discharge unit configured to discharge a substantive section-forming ink to a region that forms the three-dimensional shaped article; a second discharge unit configured to discharge a sacrificial layer-forming ink for forming a sacrificial layer to a region that is adjacent to a region that forms an outermost layer of the three-dimensional shaped article and on a surface side of the outermost layer, with the substantive section-forming ink and the sacrificial layer-forming ink both including a curing component; and a curing unit configured to cure both the substantive section-forming ink and the sacrificial layer-forming ink, a viscoelasticity of the sacrificial layer-forming ink during curing of the substantive section-forming ink being less than a viscoelasticity of the substantive section-forming ink during curing of the substantive section-forming ink.