Additive Manufacturing Cleaning Fluid System for Print Head Maintenance
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Solution Overview
Problem
Additive manufacturing apparatuses face challenges in improving manufacturing throughput and maintaining print head efficiency due to clogged nozzles caused by excess build material and binder material, leading to reduced performance and increased maintenance needs.
Innovation Solution
A cleaning fluid system comprising a mixture of water and organic solvents is applied to the print head to dissolve precipitants, and a method for monitoring the cleaning fluid's physical properties to determine maintenance needs, along with a fluorescent binder system to diagnose defects and optimize additive manufacturing device performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cleaning fluid is applied frequently to maintain print head efficiency, then nozzle clogs are reduced, but manufacturing throughput is decreased due to increased maintenance time
Solution Approach 1:
The patent implements a monitoring system that tracks cleaning fluid properties (concentration, temperature, flow rate) and print head performance metrics. This feedback mechanism allows the system to determine optimal cleaning intervals based on actual contaminant accumulation rather than fixed schedules, reducing unnecessary maintenance downtime while ensuring print head efficiency is maintained when truly needed.
Solution Approach 2:
The cleaning system is designed to automatically perform maintenance operations without interrupting the manufacturing process. The monitoring system autonomously triggers cleaning operations when contaminants reach threshold levels, and the system can perform cleaning during non-productive periods or between builds, allowing the print head to service itself rather than requiring manual intervention that stops production.
2Ease of manufacture
If cleaning fluid composition is optimized to dissolve precipitants effectively, then contaminant removal is improved, but cleaning fluid stability deteriorates due to solvent evaporation and degradation
Solution Approach 1:
The patent employs dynamic adjustment of cleaning fluid parameters including temperature, pressure, and composition ratios based on real-time monitoring of contaminant types and amounts. The system modifies these parameters to optimize dissolution effectiveness for specific precipitants while compensating for evaporation and degradation through automated replenishment and formulation adjustments, maintaining both cleaning efficiency and fluid stability.
Solution Approach 2:
The cleaning fluid is formulated as a composite mixture of multiple solvents, surfactants, and additives rather than a single chemical component. This composite approach allows different ingredients to perform specific functions (dissolving organic precipitants, preventing evaporation, maintaining pH stability) while working synergistically to enhance overall contaminant removal efficiency and extend fluid stability under varying operating conditions.
3Loss of time
If monitoring systems are implemented to track cleaning fluid status, then maintenance timing is optimized, but device complexity increases
Solution Approach 1:
The monitoring system is designed to serve multiple functions simultaneously: tracking cleaning fluid composition, temperature, and flow rate; monitoring print head performance metrics; detecting contaminant accumulation levels; and coordinating with the control system to schedule maintenance. This multi-functional approach consolidates what could be separate complex subsystems into an integrated solution that optimizes maintenance timing without proportionally increasing overall system complexity.
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 cleaning fluid system effectively reduces nozzle clogs and contaminant buildup, while the monitoring and diagnostic methods enhance the additive manufacturing process by maintaining print head efficiency and reducing downtime through automated maintenance and performance optimization.
Implementation Method 1
a cleaning fluid comprising from 70 wt % to 99.9 wt % water and 0.1 wt % to 30 wt % of one or more organic solvents... after the cleaning fluid at least partially dissolves the precipitant from the surface
Implementation Method 2
a fluorescent binder system to diagnose defects and optimize additive manufacturing device performance
Data Source
AI summary
Embodiments of the present disclosure are directed to additive manufacturing apparatuses, cleaning stations incorporated therein, and methods of cleaning using the cleaning stations.