Multi-Stage Wash System for Vat Polymerization 3D Printed Parts
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Solution Overview
Problem
Current washing systems for 3D printed objects using vat polymerization are inefficient and lack a reliable method to completely remove residual resin, which can lead to dimensional inaccuracies and exposure to toxic substances.
Innovation Solution
A multi-stage wash system with a wash solvent reservoir, agitation mechanism, and air-drying system, including a resin concentration monitoring module, to effectively remove residual resin and wash solvent from 3D printed objects, utilizing different wash styles and solvent solutions for optimal cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single-stage wash process is used, then the washing process is simple and quick, but residual resin cannot be completely removed leading to dimensional inaccuracies
Solution Approach 1:
The washing system is divided into multiple independent washing stages (first wash reservoir, second wash reservoir, third wash reservoir), each performing a specific cleaning function. This segmentation allows progressive removal of residual resin while maintaining manageable system complexity through modular design.
Solution Approach 2:
The system performs preliminary washing actions in sequence before final drying. The first wash reservoir removes bulk resin, the second wash reservoir performs intermediate cleaning, and the third wash reservoir completes the resin removal, ensuring dimensional accuracy is achieved through progressive preparation.
2Reliability
If multiple washing stages are implemented, then residual resin removal is thorough, but the washing time and process complexity increase
Solution Approach 1:
The washing system operates continuously through automated solvent dispensing and circulation across multiple reservoirs. The controller coordinates continuous solvent flow from the solvent reservoir through each wash reservoir in sequence, eliminating idle time between washing stages and maintaining continuous useful action throughout the cleaning process.
Solution Approach 2:
The system uses automated solvent circulation and agitation mechanisms that perform washing actions without manual intervention. The controller automatically manages solvent transfer, agitation timing, and reservoir sequencing, allowing the system to service itself through programmed operations rather than requiring operator attention at each stage.
3Manufacturing precision
If manual washing is used, then the system is simple to operate, but complete resin removal and consistency are difficult to achieve
Solution Approach 1:
The system incorporates sensors and controllers that monitor washing progress and automatically adjust solvent dispensing, agitation intensity, and cycle timing. This feedback mechanism ensures consistent resin removal across different operating conditions while the automated control interface maintains ease of operation through simple start/stop functionality.
Solution Approach 2:
Manual washing actions are replaced with automated mechanical and electronic systems. The controller substitutes human judgment and manual manipulation with programmed sequences that automatically manage solvent flow, agitation, and timing, achieving consistent results while maintaining operational simplicity through automated control.
4Reliability
If aggressive washing methods are used, then resin removal is effective, but the 3D printed parts may be damaged
Solution Approach 1:
Different wash reservoirs apply different washing intensities suited to their specific function. The first wash reservoir uses stronger agitation for bulk resin removal, while subsequent reservoirs use gentler methods for fine cleaning, and the air drying stage uses controlled airflow. This local quality approach ensures complete resin removal without excessive damage to delicate features.
Solution Approach 2:
The system changes washing parameters progressively across stages - from strong liquid agitation in early stages to gentler subsequent washing, and finally to controlled air drying. These parameter changes allow effective resin removal while progressively reducing mechanical stress on the part, maintaining structural integrity throughout the process.
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
The system ensures thorough removal of residual resin, maintaining dimensional accuracy and safety by using a controlled multi-stage process with real-time monitoring and adaptable wash styles, enhancing the efficiency and reliability of the washing process.
Implementation Method 1
dispersing the first solution onto the 3D-printed object... dispersing the second solution onto the 3D-printed object
Implementation Method 2
air-drying system... removing residual wash solvent from the surface of the 3D printed objects
Data Source
AI summary
The invention is generally a system for washing off residual resin from objects which are three-dimensionally (3D) printed through a vat polymerization (VP) process. Exemplary systems may include a solvent receptacle, a wash reservoir in fluid communication with the solvent receptacle, and a controller configured to pump a solvent from the solvent receptacle to the wash reservoir for washing off residual resin from a 3D-printed object. Exemplary methods may include pumping a first solution of a plurality of solvent solutions from the solvent receptacle to the wash reservoir, dispersing the first solution onto the 3D-printed object, pumping the first solution from the wash reservoir to the solvent receptacle, pumping a second solution of the plurality of solvent solutions from the solvent receptacle to the wash reservoir, and dispersing the second solution onto the 3D-printed object.