Inkjet Printer Ink Temperature Control Unit
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Solution Overview
Problem
Conventional inkjet printers face challenges in precisely controlling the temperature of ink discharged from nozzles, especially in industrial applications where ink viscosity and surface tension variations affect droplet formation and placement, leading to poor print quality due to inadequate temperature control across the ink reservoir and inkjet head.
Innovation Solution
An inkjet printer with an ink temperature control unit utilizing a vortex tube to generate low-temperature and high-temperature air currents, mixed to create a heat transfer medium that is adjusted and supplied through a heat transfer medium supply line to the inkjet head and reservoir, enabling precise temperature control of the ink using a gas-based heat exchange system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large-sized document printer continuously prints a large amount of documents or an industrial inkjet printer performs solution process with many nozzles, then the amount of ink used increases, but the conventional ink storage structure in the inkjet head becomes insufficient and requires a separate ink reservoir, which complicates the system structure
Solution Approach 1:
The inkjet printing system is divided into separate functional modules: a print head containing nozzles for droplet discharge, and a separate ink reservoir for bulk ink storage. This segmentation allows the system to handle large volumes of ink while maintaining precise local control at the nozzle interface, resolving the contradiction between high productivity and structural complexity.
2Manufacturing precision
If negative pressure is generated inside the ink reservoir to maintain the meniscus, then ink flow control is improved, but it is insufficient to maintain the meniscus due to viscosity differences, leading to poor droplet formation
Solution Approach 1:
The system dynamically adjusts the viscosity parameter of the ink by controlling its temperature. By heating the ink to reduce viscosity, the system compensates for the insufficient negative pressure effect, enabling reliable meniscus maintenance and precise droplet formation even with high-viscosity industrial inks.
Solution Approach 2:
The system utilizes thermal energy to change the physical state (temperature) of the ink, transitioning it from a cooler, more viscous state to a warmer, less viscous state. This phase transition enables the ink to flow properly through the supply channel and maintain the meniscus, ensuring reliable droplet discharge.
3Manufacturing precision
If the viscosity of ink is increased to improve ink flow control, then droplet placement precision is improved, but the ink becomes too viscous to flow through the head channel and nozzles, resulting in poor discharge
Solution Approach 1:
The system dynamically adjusts the viscosity parameter of the ink by controlling its temperature. By heating the ink to reduce viscosity, the system compensates for the insufficient negative pressure effect, enabling reliable meniscus maintenance and precise droplet formation even with high-viscosity industrial inks.
Solution Approach 2:
The system employs dynamic temperature control to adjust ink viscosity in real-time based on operational requirements. The temperature control unit continuously monitors and adjusts the ink temperature to maintain optimal viscosity for both flowability and precise droplet discharge, resolving the contradiction between placement precision and flowability.
4Manufacturing precision
If the surface tension of ink is increased to improve droplet roundness, then droplet formation is improved, but the ink becomes difficult to discharge through the nozzles, resulting in poor printing quality
Solution Approach 1:
The system dynamically adjusts the surface tension parameter of the ink by controlling its temperature. By heating the ink to reduce surface tension, the system enables smoother flow through the nozzle channels while maintaining sufficient surface tension for round droplet formation, resolving the contradiction between droplet roundness and discharge ease.
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 solution allows for efficient temperature control of the ink, reducing energy consumption and enabling precise temperature adjustments across the inkjet head and reservoir, improving print quality by maintaining optimal ink properties for industrial applications.
Implementation Method 1
a vortex tube configured to be supplied with compressed air and to discharge a low-temperature air current and a high-temperature air current
Implementation Method 2
a heat transfer medium supply line configured to supply the heat transfer medium generated in the mixing part to the inkjet head, and the heat transfer medium supplied to the inkjet head through the heat transfer medium supply line may be configured to change the temperature of the ink discharged from the inkjet head by a heat exchange structure
Data Source
AI summary
An inkjet printer configured to control the temperature of ink discharged from nozzles of an inkjet head is proposed. The inkjet printer includes: an inkjet head including a plurality of nozzles configured to discharge ink, an ink reservoir configured to store ink supplied to the inkjet head, a supply channel configured to supply the ink in the ink reservoir to the inkjet head, a pressure control device connected to the ink reservoir through a pressure control tube and configured to maintain the meniscus of the ink injected into the inkjet head, and the ink temperature control unit configured to control temperature of the ink discharged from the inkjet head.