Inkjet Head Dehumidifying Enclosure for Nozzle Clog Prevention
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Solution Overview
Problem
Existing inkjet printing apparatuses fail to maintain precise humidity control for the inkjet head, leading to nozzle clogging, Mura effect, and non-uniform printing quality, especially when using inks with metal or alloy components, and are affected by external environmental humidity changes.
Innovation Solution
An inkjet head management apparatus with a housing, closer, and dehumidifier to create a controlled dehumidifying atmosphere for the inkjet head, separate from the printing process environment, using a desiccant and heater to manage humidity and prevent nozzle clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If general inkjet printing apparatuses control the humidity of the overall printing process atmosphere, then the printing process can be maintained, but the inkjet head part cannot be kept dry separately, leading to nozzle clogging and ink deterioration
Solution Approach 1:
The invention divides the humidity control into two separate systems: one for the printing process atmosphere and another dedicated system for the inkjet head storage space. This segmentation allows independent control of humidity in each zone, enabling the inkjet head to be kept dry while maintaining appropriate printing conditions.
Solution Approach 2:
The invention introduces a dehumidifier as an intermediary device that actively removes moisture from the inkjet head storage space. This intermediary component mediates between the humid printing environment and the need for a dry storage environment, preventing direct exposure of the inkjet head to harmful humidity.
2Productivity
If the inkjet head is exposed to humid environment for printing process, then printing can be performed, but the ink deteriorates and inorganic components are oxidized
Solution Approach 1:
The invention separates the printing process environment from the inkjet head storage environment. The printing process can proceed in the main chamber while the inkjet head remains in a dedicated dry storage space with controlled humidity, preventing ink deterioration during non-printing periods.
Solution Approach 2:
The invention maintains a pre-conditioned dry environment in the inkjet head storage space before the inkjet head is needed for printing. This preliminary dehumidification action ensures the inkjet head is ready for immediate use without exposure to harmful humidity, preventing oxidative damage to inorganic components.
3Manufacturing precision
If special-purpose inkjet heads are frequently replaced to maintain printing quality, then consistent printing can be achieved, but production costs increase
Solution Approach 1:
The invention enables the inkjet head to maintain its own optimal humidity environment through the integrated dehumidifier system. This self-service capability extends the operational lifespan of the inkjet head by preventing moisture-related degradation, reducing the frequency of replacement needed to maintain printing quality.
4Reliability
If the inkjet head is kept in a dry environment, then nozzle clogging is prevented, but the overall printing atmosphere humidity cannot be controlled
Solution Approach 1:
The invention creates separate controlled environments: the main printing chamber can maintain humidity levels suitable for the printing process, while the inkjet head storage space is independently dehumidified. This segmentation allows both conditions to coexist without interference, enabling nozzle protection while maintaining printing versatility.
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 maintains a stable dehumidifying atmosphere for the inkjet head, preventing nozzle clogging and ink deterioration, extending the inkjet head's lifespan and ensuring consistent printing quality.
Implementation Method 1
The dehumidifier may include a desiccant for providing a dehumidifying atmosphere toward the opening
Implementation Method 2
the heater may provide heat to the desiccant to evaporate moisture of the desiccant
Implementation Method 3
the heater may provide heat to the desiccant to evaporate moisture of the desiccant and reduce the weight of the desiccant
Data Source
AI summary
An inkjet head management apparatus for managing a humidity of an inkjet head including nozzles for ejecting droplets in an inkjet manner includes a housing having an opening on at least one surface thereof, a closer for opening or closing the opening of the housing, and a dehumidifier disposed in the housing to provide a dehumidifying atmosphere toward the opening when the opening is opened.