On-Demand Colorization for Extrusion-Based Additive Construction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current extrusion-based additive construction (EAC) 3D printing methods lack an efficient and practical solution for on-demand colorization, requiring users to manually switch between colored filaments, limiting color choices and increasing printing time and complexity.
Innovation Solution
A system and method utilizing a tank system with subchambers and pumps to mix and apply dyes to a single filament, allowing for on-demand colorization of objects by pumping dye combinations into a mixing chamber where the filament is fully colored before extrusion, using water-soluble or disperse dyes depending on the filament material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple colored filaments are used with manual switching, then color variety is achieved, but printing time and operational complexity increase
Solution Approach 1:
The color delivery system is segmented into multiple independent subchambers, each containing a different dye. This allows selective delivery of different colors to the mixing chamber without requiring physical filament switching, enabling on-demand colorization while maintaining continuous printing operation.
Solution Approach 2:
A mixing chamber acts as an intermediary between the multiple dye subchambers and the extruder. The mixing chamber combines selected dyes in liquid form before they reach the extruder, allowing color variation without interrupting the extrusion process or requiring manual filament replacement.
2Adaptability or versatility
If multiple colored filaments are used with manual switching, then color variety is achieved, but device complexity increases
Solution Approach 1:
The manual mechanical operation of switching filaments is replaced with an automated pump system. Peristaltic pumps mechanically deliver precise amounts of liquid dye from subchambers to the mixing chamber based on digital controls, eliminating manual intervention and reducing operational complexity despite having multiple color options.
Solution Approach 2:
The system changes the physical state of colorants from solid pigments in filaments to liquid dyes in subchambers. This parameter change enables automated delivery and mixing through fluid dynamics rather than mechanical filament handling, simplifying the control system while maintaining color variety.
3Extent of automation
If multiple extruders are used for colorization, then on-demand color change is achieved, but device size and complexity increase
Solution Approach 1:
Multiple color delivery functions are merged into a single extruder assembly. Instead of having separate extruders for each color, the patent combines multiple dye subchambers feeding into a single mixing chamber that interfaces with one extruder, achieving on-demand colorization without proportionally increasing the printer's volume or complexity.
Solution Approach 2:
The dye subchambers are nested or arranged in close proximity within the printer housing, with peristaltic pumps delivering dye through compact tubing to the mixing chamber. This nested arrangement minimizes the overall footprint of the colorization system while maintaining the capability for on-demand color changes.
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 automated, efficient, and precise colorization of 3D objects without the need for multiple extruders or filaments, reducing printing time and increasing productivity while allowing for a wide range of colors and compact printer design.
Implementation Method 1
The pumps are peristaltic pumps
Implementation Method 2
The filament is allowed to diffuse to form a homogeneous colorant within the mixing chamber
Data Source
AI summary
A color 3D printer and its method of use are disclosed. The color 3D printer uses a number of chambers to dye a filament to a given color. This colored filament is then extruded, pursuant to an associated 3D model of an object, to produce varying colored physical objects, on demand, with the use of a single filament and a single print head. Further, the color 3D printer features a waste management apparatus which provides a number of ways to dispose of waste fluid.