Droplet Ejection Behavior in Electrostatic Inkjet Driving

Ishida, Yasuko; Sogabe, K.; Kai, Shoich; Asano, Tanemasa

doi:10.1143/jjap.47.5281

Cited by 14 publications

(5 citation statements)

References 18 publications

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“…As June of 2016, 3D printing technology is applied for following many fields. Artificial bone, artificial joint, and artificial organ in the bio medical technology field and solar cell in green technology field were fabricated by the 3D inkjet method910111213. Complex metal products were fabricated by the Selective Laser Sintering (SLS)141516.…”

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confidence: 99%

Development of the Improving Process for the 3D Printed Structure

Takagishi

Umezu

2017

Sci Rep

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The authors focus on the Fused Deposition Modeling (FDM) 3D printer because the FDM 3D printer can print the utility resin material. It can print with low cost and therefore it is the most suitable for home 3D printer. The FDM 3D printer has the problem that it produces layer grooves on the surface of the 3D printed structure. Therefore the authors developed the 3D-Chemical Melting Finishing (3D-CMF) for removing layer grooves. In this method, a pen-style device is filled with a chemical able to dissolve the materials used for building 3D printed structures. By controlling the behavior of this pen-style device, the convex parts of layer grooves on the surface of the 3D printed structure are dissolved, which, in turn, fills the concave parts. In this study it proves the superiority of the 3D-CMF than conventional processing for the 3D printed structure. It proves utilizing the evaluation of the safety, selectively and stability. It confirms the improving of the 3D-CMF and it is confirmed utilizing the data of the surface roughness precision and the observation of the internal state and the evaluation of the mechanical characteristics.

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confidence: 99%

Development of the Improving Process for the 3D Printed Structure

Takagishi

Umezu

2017

Sci Rep

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“…To adapt EHD jetting in the printing process for electronics fabrication, stable EHD jetting on demand using a pulsed voltage signal similar to piezoelectric ink-jet should be realized. [4][5][6][7][8] Note that a piezoelectric ink-jet commonly uses a bipolar voltage waveform, where the first rising voltage pulls back the meniscus at the nozzle end by expanding the glass capillary and the droplet is pushed out of the nozzle by applying the falling voltage after a dwell time corresponding to the duration required for the propagation and reflection of acoustic waves inside the glass capillary. [9][10][11] Resonant oscillation phenomena of a sessile droplet have been extensively investigated since Bisch et al, 12) observed the axial vibrations of a liquid droplet lying on a cylindrical support.…”

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confidence: 99%

Resonant oscillation phenomena of a sessile droplet on electrohydrodynamic jetting nozzle

Kim¹,

Yang²,

Chung³

2014

Jpn. J. Appl. Phys.

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The resonant oscillation of a sessile droplet on the electrohydrodynamic (EHD) jetting nozzle was studied using a series of sinusoidal and square pulse voltage signal. At small amplitude oscillations, the lowest mode resonant frequency depended on a contact angle and the explicit relationship was developed assuming one-dimensional standing capillary wave. When the meniscus was oscillated with a higher voltage amplitude for jetting, its height became maximum at the phase delay of about π/2 from the maximum applied voltage signal, which can be predicted in a harmonic oscillator model. In addition, there existed an effective resonant frequency where the meniscus oscillation was amplified quickly to initiate a jetting earlier, and the jetting continued every cycle afterwards. Therefore, the resonant oscillation would be effectively used for high speed printing of a simple regular pattern where the jetting should occur at a constant frequency.

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“…In a conventional electrostatic inkjet printing head, a single electrode is inserted vertically. But with this configuration, the voltage requirement for getting a stable meniscus, droplet extraction and jetting is very high [11]. 0960-1317/10/075033+07$30.00 Also, obtaining uniform patterns with this vertically inserted single electrode (VISE) head is not an easy job because, to obtain uniform patterns, the first condition is to develop a very stable jet and it can only be obtained from a very stable meniscus.…”

Section: Introductionmentioning

confidence: 99%

Electrode configuration effects on the electrification and voltage variation in an electrostatic inkjet printing head

Choi

Ali

Rahman

et al. 2010

J. Micromech. Microeng.

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The electrode configuration of an electrostatic inkjet printing head is under study. This paper introduces the development of a new electrostatic inkjet head with an improved electrode configuration as compared to the conventional configuration. Two tungsten electrodes, connected in parallel, are inserted into the electrostatic print head at a certain angle from opposite sides. The aim of this double-side inserted angular electrodes (DSIAEs) head is to intensify the electrification of the fluid inside the head at minimum suitable exposure of the electrode, which results in maximizing surface charge density. The main advantage of the DSIAEs head is to get a very stable meniscus at low applied voltage for printing. This stable meniscus is transformed to a very stable jet by increasing the applied voltage. Therefore, printed patterns obtained with this DSIAEs head are more uniform because of a more stable meniscus and jet as compared to a conventional electrostatic vertically inserted single electrode head. Also, with this DSIAEs configuration, the life of the electrostatic inkjet printing head is increased.

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Droplet Ejection Behavior in Electrostatic Inkjet Driving

Cited by 14 publications

References 18 publications

Development of the Improving Process for the 3D Printed Structure

Development of the Improving Process for the 3D Printed Structure

Resonant oscillation phenomena of a sessile droplet on electrohydrodynamic jetting nozzle

Electrode configuration effects on the electrification and voltage variation in an electrostatic inkjet printing head

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