Splash Guard Deflects Ink Flow to Prevent Sludge
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Solution Overview
Problem
Ink splashing in liquid ink printing devices leads to the accumulation of sludge, causing malfunctions, cross-contamination, print quality issues, and increased maintenance costs, as existing solutions like increasing tray height or designing splash guards with minimal gaps between components either fail to prevent splashes or result in ink overflow and evaporation.
Innovation Solution
A splash guard is positioned between the main electrode and ink tray, deflecting excess ink into a controlled channel that prevents evaporation and ensures a continuous flow to the outlet, reducing sludge buildup and maintaining ink circulation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the ink tray height is increased to prevent splashes, then splash prevention is improved, but ink flow circulation is blocked and evaporation increases
Solution Approach 1:
The ink tray is segmented into a main tray area and a separate collection channel by the splash guard. The splash guard creates a physical division that redirects splashed ink into the collection channel while maintaining the main circulation path open, thus preventing splashes without blocking ink flow.
Solution Approach 2:
The splash guard acts as an intermediary element between the ink tray and the collection channel. It intercepts splashed ink and redirects it into the collection channel, serving as a mediator that prevents splashes from reaching problematic areas while maintaining overall ink circulation through the system.
2Object-affected harmful factors
If a splash guard is positioned close to the squeegee roller to contain splashes, then splash containment is improved, but ink can overflow and evaporate
Solution Approach 1:
The collection channel is designed as a separate extracted path for handling splashed ink. Instead of trying to contain all ink in the main tray, the system extracts splashed ink into a dedicated collection channel where it can be managed separately, preventing both splash damage and evaporation losses.
Solution Approach 2:
The collection channel maintains continuous ink flow from the splash guard to the outlet, ensuring that splashed ink continuously moves through the channel rather than stagnating. This continuous flow prevents evaporation while maintaining effective splash containment.
3Object-affected harmful factors
If the splash guard gap is minimized to prevent splashes, then splash prevention is improved, but ink flow is restricted and overflow occurs
Solution Approach 1:
The solution moves from controlling splash in the horizontal plane (by minimizing gaps) to managing it in a different dimension through the collection channel. The splash guard deflects ink into the collection channel, which provides an additional dimensional path for ink flow, thus preventing splashes without restricting overall flow.
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 splash guard effectively reduces squeegee roller splashes, minimizing print defects, cross-contamination, and extending the device's operational life by maintaining a steady ink flow that prevents sludge accumulation and overflow.
Implementation Method 1
deflecting excess ink into a controlled channel that prevents evaporation and ensures a continuous flow to the outlet
Implementation Method 2
a controlled channel that prevents evaporation
Data Source
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AI summary
A splash guard (300, 500, 700) is configured to control the flow of excess liquid generated by an interaction between a first roller (104) and a second roller (112) by splitting the flow of the excess liquid into a first flow (600) and a second flow (610).