Print Head Air Damping for Ink Pressure Fluctuation Control
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Solution Overview
Problem
Existing inkjet print apparatuses face challenges in suppressing ink pressure fluctuations without complicating the reservoir unit structure, as they require a damper sheet inside the reservoir unit.
Innovation Solution
A drawing machine with a pressure fluctuation adjustment section that uses an electromagnetic valve to control air flow, maintaining appropriate air pressure within the system, thereby suppressing ink pressure fluctuations without the need for a damper sheet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a damper sheet is provided inside the reservoir unit to suppress ink pressure fluctuation, then the pressure fluctuation of ink is suppressed, but the structure of the reservoir unit becomes complicated
Solution Approach 1:
The invention extracts the damper sheet from the reservoir unit structure and relocates the pressure fluctuation suppression function to a separate chamber. The reservoir unit now only contains the ink storage space, while the pressure fluctuation suppression is achieved through a dedicated chamber with communication ports, thereby simplifying the reservoir unit structure while maintaining pressure stability.
Solution Approach 2:
The invention introduces a communication port as an intermediary element that connects the reservoir unit to a separate pressure regulation chamber. This intermediary allows pressure equalization without requiring direct integration of a damper sheet into the reservoir, thus achieving pressure fluctuation suppression while keeping the reservoir structure simple.
2Device complexity
If the reservoir unit structure is simplified by removing the damper sheet, then the device complexity is reduced, but the pressure fluctuation suppression capability is lost
Solution Approach 1:
The invention merges the pressure fluctuation suppression function with the existing reservoir unit by providing a communication port that connects to a chamber capable of pressure regulation. This integration allows the simplified reservoir structure to work in conjunction with the pressure regulation mechanism, achieving both simplicity and pressure stability.
Solution Approach 2:
The invention utilizes pneumatic principles by introducing air through a communication port into a chamber that is in communication with the reservoir unit. This pneumatic approach allows pressure fluctuation suppression through gas-liquid interaction in the chamber, replacing the need for a solid damper sheet while maintaining the suppression capability.
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 effectively stabilizes ink pressure fluctuations with a simpler structure, ensuring consistent ink ejection and quality.
Implementation Method 1
a pressure fluctuation adjustment section disposed in a middle of an ink flow path between the first port and the second port, and a third port that receives air supply to the pressure fluctuation adjustment section
Implementation Method 2
a first electromagnetic valve disposed in a middle of an air flow path that supplies air to the pressure fluctuation adjustment section via the third port, and configured to open and close the air flow path
Data Source
AI summary
The pressure fluctuation of ink can be suppressed even with a simple structure. A print head of a drawing machine includes a first port that receives supply of ink from an ink tank, a second port that discharges ink, a pressure fluctuation adjustment section, and a third port that receives air supply to the pressure fluctuation adjustment section. The drawing machine includes an electromagnetic valve that opens and closes an air flow path for supplying air to the pressure fluctuation adjustment section via the third port. When the print head does not eject ink, the electromagnetic valve is opened to enable air to be supplied into the pressure fluctuation adjustment section.