Experimental and Theoretical Study of Wave Propagation Phenomena in Drop-on-Demand Ink Jet Devices

Bogy, David B.; Talke, Frank E.

doi:10.1147/rd.283.0314

Cited by 256 publications

(182 citation statements)

References 1 publication

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“…Upon reaching the orifice, the pressure pulse must be of sufficient magnitude to cause the fluid meniscus at the nozzle to deform and project a ligament of fluid, which is of sufficient kinetic energy to break off from the nozzle and proceed to reduce surface energy by forming a sphere (or spheres). There are two primary ways of generating the requisite pressure pulse: use of a resistive heater placed near the nozzle to generate a rapidly expanding bubble (thermal) [41], or use of a piezoelectric actuator that deforms upon application of a short voltage pulse (piezoelectric) (Figure 1) [42]. While thermal inkjet is used extensively in graphical applications and has been used for functional inks (typically using refurbished graphics printing cartridges) [37,43], most work that looks to print functional inks and devices has used piezoelectric inkjet printheads [44,45].…”

Section: Droplet Generationmentioning

confidence: 99%

Integration of additive manufacturing and inkjet printed electronics: a potential route to parts with embedded multifunctionality

et al. 2016

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-Additive manufacturing, an umbrella term for a number of different manufacturing techniques, has attracted increasing interest recently for a number of reasons, such as the facile customisation of parts, reduced time to manufacture from initial design, and possibilities in distributed manufacturing and structural electronics. Inkjet printing is an additive manufacturing technique that is readily integrated with other manufacturing processes, eminently scalable and used extensively in printed electronics. It therefore presents itself as a good candidate for integration with other additive manufacturing techniques to enable the creation of parts with embedded electronics in a timely and cost effective manner. This review introduces some of the fundamental principles of inkjet printing; such as droplet generation, deposition, phase change and post-deposition processing. Particular focus is given to materials most relevant to incorporating structural electronics and how post-processing of these materials has been able to maintain compatibility with temperature sensitive substrates. Specific obstacles likely to be encountered in such an integration and potential strategies to address them will also be discussed.

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Section: Droplet Generationmentioning

confidence: 99%

Integration of additive manufacturing and inkjet printed electronics: a potential route to parts with embedded multifunctionality

et al. 2016

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“…From the analysis of wave propagation theory, a pressure wave will change signs when it reflects from an open end and retain its sign as it reflects from a closed end. The 6) had proposed an optimum pulse width, t opt , calculating as following…”

Section: Basics For Piezoelectric Inkjetmentioning

confidence: 99%

The Effects of Operating Parameters on Micro-Droplet Formation in a Piezoelectric Inkjet Printhead Using a Double Pulse Voltage Pattern

Lin

Shan

et al. 2006

Mater. Trans.

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The formation and ejection behavior of droplets created by a squeeze mode piezoelectric inkjet printing device using a double pulse voltage pattern are investigated in this study. Two types of fluid, de-ionized (DI) water and ethylene glycol, are used. The effects of operating frequency, positive voltage keeping time and pulse voltage magnitude on the volume and velocity of the droplets are discussed. The experimental results are consistent with the propagation theory of acoustic waves. The maximum allowable pulse frequencies in DI water and ethylene glycol are 2,000 and 22,700 Hz respectively. If the positive voltage keeping time equals the time required for the acoustic waves to propagate through the printhead, optimal ejection behavior is achieved. As the pulse voltage increases, both the velocity and volume of each droplet become larger.

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“…The response of the piezoelectric crystal tube itself was studied in Bugdayci et al,8) in which the inner cylindrical wall displacement of the tube was calculated for an applied voltage. Bogy and Talke 9) calculated the variation of pressure at the nozzle inlet, which was caused by the expansion and contraction of the piezoelectric tube. A numerical method for the drop formation based on the axisymmetric Navier-Stokes equations was presented by Fromm.…”

Section: Introductionmentioning

confidence: 99%

Effects of Actuating Pressure Waveforms on the Droplet Behavior in a Piezoelectric Inkjet

Lin

2010

Mater. Trans.

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This paper presents a numerical analysis of a piezoelectric actuated droplet generator. A three-dimensional finite difference numerical model based on a SOLA (solution algorithm) scheme for the solution of governing equations of the flow field and a volume-of-fluid method for tracing the fluid interfaces are presented. The surface tension is modeled using a continuum surface force concept and thus computed as a function of the interfacial curvature. The pressure pulse at the nozzle inlet, which is related to the applied voltage, was imposed according to the propagation theory of acoustic waves. The effects of the pressure waveforms, including positive and negative pressure amplitudes, operating period and acceleration of the positive pressure, on the droplet ejection process are simulated. The performance of piezoelectric inkjet: droplet break time, droplet tail length, droplet velocity and droplet volume are analyzed. The simulation results show that the tail length and volume of the droplet increase with the amplitude of the positive pressure and operating period. The breakup time of the droplet is shorter when the amplitude of the negative pressure increases. The factors that influence satellite droplets are also investigated in this study.

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Experimental and Theoretical Study of Wave Propagation Phenomena in Drop-on-Demand Ink Jet Devices

Cited by 256 publications

References 1 publication

Integration of additive manufacturing and inkjet printed electronics: a potential route to parts with embedded multifunctionality

Integration of additive manufacturing and inkjet printed electronics: a potential route to parts with embedded multifunctionality

The Effects of Operating Parameters on Micro-Droplet Formation in a Piezoelectric Inkjet Printhead Using a Double Pulse Voltage Pattern

Effects of Actuating Pressure Waveforms on the Droplet Behavior in a Piezoelectric Inkjet

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