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http://dx.doi.org/10.5369/JSST.2018.27.6.421

Characteristic Analysis of High Speed Inkjet Printing Head for Digital Textile Printing  

Lee, Duck-Gyu (Department of Nature-Inspired Nanoconvergence Systems, Nanoconvergence Mechanical System Division, Korea Institute of Machinery & Materials)
Hur, Shin (Department of Nature-Inspired Nanoconvergence Systems, Nanoconvergence Mechanical System Division, Korea Institute of Machinery & Materials)
Publication Information
Journal of Sensor Science and Technology / v.27, no.6, 2018 , pp. 421-426 More about this Journal
Abstract
To develop a piezoelectric inkjet printhead for high-resolution and high-speed printing, we studied the characteristics of an inkjet printhead by analyzing the major design parameters. An analytical model for the inkjet printhead was established, and numerical analysis of the coupled first-order differential equation for the defined state variables was performed using state equations. To design the dimension of the inkjet printhead with a driving frequency of 100 kHz, the characteristics of the flow rate and discharge pressure of the nozzle were analyzed with respect to design variables of the flow chamber, effective sound wave velocity, driving voltage, and voltage waveform. It was predicted that the change in the height of the flow chamber does not significantly affect the Helmholtz resonance frequency and discharge speed of the nozzle. From the analysis of change in flow chamber width, it is observed that as the width of the flow chamber increases, the ejection speed greatly increases and the Helmholtz resonance frequency decreases considerably, thereby substantially affecting the performance of the inkjet printhead.
Keywords
Piezoelectric; Inkjet; Printhead; Two-port model; Jetting Velocity; Discharge Pressure;
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