Modular Ink Guidance for Printhead Pressure Wave Cushioning
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Solution Overview
Problem
Existing ink jet printing systems face challenges in designing scalable ink guidance that ensures sufficient ink supply with correct pressure and flow rate while preventing pressure waves from disturbing neighboring print heads, leading to issues like bubble formation and reduced ink drop ejection efficiency.
Innovation Solution
An ink guiding device with partial guide housings that can be filled with ink and gas, connected via seals and horizontal pieces, providing scalability and cushioning pressure waves, and equipped with sensors for precise control of ink and gas levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional ink supply system with back pressure tank and distributors is used, then ink can be supplied with correct pressure and flow rate, but the system becomes complex and not scalable to different printing system configurations
Solution Approach 1:
The ink supply system is divided into modular ink guidance devices, each serving specific print heads. Each device includes a reservoir, flow controller, and filtration system as separate functional modules that can be independently configured and replaced based on printing system requirements, enabling scalability while maintaining reliable ink supply.
Solution Approach 2:
The ink guidance devices incorporate adjustable flow controllers and pressure regulators that can be dynamically tuned for different printing configurations. The system allows dynamic adjustment of ink flow parameters to maintain consistent pressure and flow rate across varying system configurations, resolving the contradiction between reliability and adaptability.
2Device complexity
If ink is supplied to multiple print heads through a common manifold, then the system is simplified, but pressure waves from ink ejection disturb neighboring print heads causing bubble formation and reduced ejection efficiency
Solution Approach 1:
The system separates ink supply paths for different print heads into distinct ink guidance devices, preventing pressure wave interference between neighboring print heads. Each device independently manages ink flow to its assigned print heads, eliminating the bubble formation and ejection efficiency problems caused by shared manifolds.
Solution Approach 2:
Flow controllers and filtration systems act as intermediaries between the ink reservoir and print heads, dampening pressure waves before they reach the print heads. This mediation prevents pressure wave transmission to neighboring print heads while maintaining reliable ink supply.
3Manufacturing precision
If the ink supply system is designed for high precision pressure control, then ink drop ejection accuracy is improved, but the system becomes less adaptable to different printing configurations
Solution Approach 1:
The ink supply system is segmented into standardized modular devices that can be precisely controlled individually. Each module maintains high precision pressure control for its assigned print heads while the modular architecture allows flexible configuration for different printing system scales and types, resolving the contradiction between precision and adaptability.
Solution Approach 2:
The ink guidance devices are designed with universal interfaces and standardized components that enable them to function precisely across multiple printing configurations. The same device design can serve different numbers and types of print heads through modular assembly, maintaining precision while providing scalability.
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 solution achieves scalable ink supply and discharge with effective pressure wave cushioning, ensuring consistent ink flow and preventing disturbances, thus maintaining print quality and efficiency.
Implementation Method 1
designing ink guidance in such a way that sufficient ink arrives in each print head with a correct pressure and a correct flow rate and, at the same time, pressure waves cannot continue during the ejection of ink in such a way that they can exert a disturbing influence on neighboring print heads
Data Source
AI summary
An arrangement for directing ink from/to printheads of an ink jet printing system. The arrangement has printheads and an ink guiding device adapted to direct ink from/to the printheads. The ink guiding device has partial guide housings, a connecting piece that connects underneath each partial guide housing with the print heads in an ink-guiding manner, a horizontal connector connecting a first partial guide housing at a first horizontal end in an ink-guiding manner to an ink supply, and a horizontal end piece closing a last partial guide housing at a second horizontal end. Each partial guide housing has a volume that can be filled partly with ink and partly with gas.