Valve Driving Device Staged Pressure Release for Ink Dripping
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Solution Overview
Problem
Existing valve driving devices for self-sealing valves in liquid droplet discharging systems suffer from residual pressure issues after pressurized cleaning, leading to ink dripping and delaying subsequent operations like nozzle wiping, especially when the head is positioned horizontally, due to the separation of air bags from flexible members causing incomplete sealing.
Innovation Solution
A valve driving device that separates the pressing of the pressure receiving plate portion before the pressure receiving film portion, using a pressing driving portion to control the advance and retreat of these components, ensuring the pressure receiving film portion does not deform on the outer side of the secondary liquid chamber, thereby reducing residual pressure and allowing for quicker valve closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air is removed from the air bag to finish pressurized cleaning, then the valve can be blocked, but residual pressure remains in the secondary liquid chamber causing ink dripping
Solution Approach 1:
The pressure receiving member is divided into two distinct parts: a pressure receiving plate portion and a pressure receiving film portion. This segmentation allows the plate portion to be pressed and released first, followed by the film portion, enabling staged pressure release that prevents residual pressure while maintaining reliable valve sealing.
Solution Approach 2:
The pressing driving portion is designed to release pressure in a specific sequence: first releasing the pressure receiving plate portion, then releasing the pressure receiving film portion. This preliminary staged action ensures that the valve is properly sealed before complete pressure release, preventing ink dripping while eliminating residual pressure.
2Productivity
If the air bag is completely separated from the pressure receiving plate, then pressurized cleaning is finished, but the flexible member deforms on the outer side generating residual pressure
Solution Approach 1:
The pressing driving portion performs preliminary staged release: first separating from the pressure receiving plate portion, then separating from the pressure receiving film portion. This preliminary action sequence ensures complete pressure release for efficient cleaning while preventing the film portion from deforming outward and generating residual pressure.
Solution Approach 2:
The pressure receiving film portion is designed as a flexible thin film that can deform during pressing but is controlled to not deform outward during release. This flexible structure enables complete pressure release for efficient cleaning while maintaining control to prevent residual pressure generation.
3Duration of action of moving object
If the valve closure process is delayed to allow air removal from the air bag, then pressurized cleaning is completed, but ink dripping occurs and subsequent wiping operations are delayed
Solution Approach 1:
The pressing driving portion implements preliminary staged release where the pressure receiving plate portion is released first to close the valve, then the pressure receiving film portion is released to eliminate residual pressure. This preliminary action sequence completes pressurized cleaning quickly while preventing ink dripping, enabling immediate transition to wiping operations and improving overall maintenance efficiency.
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
This configuration significantly reduces residual pressure in the secondary liquid chamber, enabling the self-sealing valve to return to its regular state rapidly, allowing for immediate transition to subsequent operations, such as wiping, by accurately releasing the pressure receiving film portion after the pressure receiving plate portion, thus preventing ink dripping and facilitating efficient maintenance.
Implementation Method 1
a pressure receiving member that is provided on a wall surface of the secondary liquid chamber, partitions the secondary liquid chamber and atmospheric air in a liquid tight manner and reacts to a difference in pressure between the pressure of the secondary liquid chamber and atmospheric pressure
Implementation Method 2
the flexible member deforms on the inner side due to atmospheric pressure. When the flexible member deforms, the shaft portion is pressed, the valve is opened
Implementation Method 3
a pressing driving portion that removes pressing of the pressure receiving plate portion prior to that of the pressure receiving film portion
Data Source
AI summary
A valve driving device including a primary liquid chamber, a secondary liquid chamber, a valve body that opens and closes a communication flow channel through which the primary liquid chamber and the secondary liquid chamber are in communication, a pressure receiving member that partitions the secondary liquid chamber and atmospheric air in a liquid tight manner, and an operation member that opens and closes the valve body by transmitting the reaction of the pressure receiving member to the valve body, in which the pressure receiving member includes a pressure receiving plate portion that operates the operation member, and a pressure receiving film portion that is provided in the periphery of the pressure receiving plate portion, the valve driving device including a pressing driving portion that removes pressing of the pressure receiving plate portion prior to that of the pressure receiving film portion.