3D Particle Printing with Segmented Thermal Control
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Solution Overview
Problem
Existing 3D printing technologies face challenges in maintaining precise temperature control during the printing process, managing moisture in inks, and ensuring stable dispersion and sintering of particles, which can lead to deformation and poor structural integrity of printed objects.
Innovation Solution
A system and method for 3D printing that includes temperature control using heat sources and sensors, moisture management through heated containers with ventilated gas, and a crosslinked binder system using polyol resin and blocked isocyanate to create a stable ink composition for particle sintering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional 3D printing processes are used without advanced temperature control, then the printing process is simpler, but temperature control precision deteriorates leading to deformation and poor structural integrity
Solution Approach 1:
The temperature control system is segmented into multiple independent heat sources (first heat source in base plate, second heat source above substrate) and multiple temperature sensors, allowing separate control of substrate temperature and top layer temperature. This segmentation enables precise temperature control at different locations without requiring a monolithic complex system.
Solution Approach 2:
The first heat source in the base plate performs preliminary heating of the substrate before ink deposition, ensuring the substrate reaches the required temperature for optimal printing. This preliminary action prevents temperature fluctuations during printing and maintains manufacturing precision without continuous complex intervention.
2Stability of the object's composition
If moisture is not managed in the ink, then the ink composition is simpler, but particle dispersion stability deteriorates leading to poor sintering and structural integrity
Solution Approach 1:
The moisture management system extracts and removes moisture from the ink through a heated container with ventilated gas flow. By taking out the harmful moisture component, the system maintains stable particle dispersion and sintering quality without requiring complex chemical formulations or sealed environments.
Solution Approach 2:
The system changes the temperature parameter of the ink storage container to a controlled elevated level, which reduces moisture content in the ink. This parameter change stabilizes particle dispersion and prevents sintering defects without requiring complex chemical additives or environmental controls.
3Manufacturing precision
If temperature control is not implemented, then the printing process is faster and simpler, but particle sintering quality deteriorates leading to deformation and poor structural integrity
Solution Approach 1:
The temperature control system operates continuously throughout the printing process, maintaining optimal substrate and top layer temperatures without interruption. This continuous thermal action ensures consistent particle sintering quality and prevents deformation, allowing the printing process to proceed at steady speed without rework or quality checks.
Solution Approach 2:
The system replaces mechanical mixing or post-processing sintering operations with controlled thermal fields from the heat sources. This substitution enables particle sintering to occur during the printing process itself, maintaining high sintering quality without sacrificing printing speed through separate processing steps.
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
Achieves precise temperature control, reduces moisture impact, and ensures stable particle sintering, resulting in robust and structurally sound 3D printed objects with improved quality and durability.
Implementation Method 1
a base plate comprising a first heat source operable to emit heat; a substrate attached to the base plate
Implementation Method 2
a second heat source located above the substrate operable to emit heat onto a top layer of the plurality of layers
Implementation Method 3
The second temperature sensor may comprise a thermal IR detector
Implementation Method 4
a crosslinked binder system using polyol resin and blocked isocyanate to create a stable ink composition for particle sintering
Data Source
AI summary
3D (three-dimensional) ink-jet printing includes techniques for evaporating a carrier liquid during printing while at least a portion of dispersant remains in the printed layer; evaporating dispersant in a first layer prior to sintering the first layer and/or prior to printing a second layer; leveling an upper-layer of a printed object using a horizontal roller; and printing layers of an object, each layer with both object and support portions, resulting in an object with support, in particular, support for negative angles and molds.