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Journal articles on the topic 'Printhead'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Saedan, Mana, and Manatpong Mangkrai. "Push-Mode Printhead Using Magnetic Linear Actuator." Advanced Materials Research 931-932 (May 2014): 1280–84. http://dx.doi.org/10.4028/www.scientific.net/amr.931-932.1280.

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A magnetic linear actuator drop-on-demand printhead with interchangeable components is designed and fabricated. The manufacturing processes of all parts are carried out with simple techniques. A droplet generation relies on a linear motion from a piston inside a printhead chamber that causes a pressure wave to push an ink out from a nozzle-aperture. The motion is actuated by a voice coil liked actuator. The voltage applied across the actuator is significantly lower than the piezo actuator. The interchangeable components enable rapid configuration of a printhead to suit wide range of ink-materials. The prototype of our printhead was tested with inks prepared from glycerin-water solutions. The operability of the printhead was evaluated at actuated time ranging from 2 100 milliseconds. Our printhead was able to jet a single droplet of ink with viscosity up to 35 mPa.s. The drop size is comparable to other types of printheads.

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Nguyen, Vinh-Tan, Jason Yu Chuan Leong, Satoshi Watanabe, Toshimitsu Morooka, and Takayuki Shimizu. "A Multi-Fidelity Model for Simulations and Sensitivity Analysis of Piezoelectric Inkjet Printheads." Micromachines 12, no. 9 (2021): 1038. http://dx.doi.org/10.3390/mi12091038.

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The ink drop generation process in piezoelectric droplet-on-demand devices is a complex multiphysics process. A fully resolved simulation of such a system involves a coupled fluid–structure interaction approach employing both computational fluid dynamics (CFD) and computational structural mechanics (CSM) models; thus, it is computationally expensive for engineering design and analysis. In this work, a simplified lumped element model (LEM) is proposed for the simulation of piezoelectric inkjet printheads using the analogy of equivalent electrical circuits. The model’s parameters are computed from three-dimensional fluid and structural simulations, taking into account the detailed geometrical features of the inkjet printhead. Inherently, this multifidelity LEM approach is much faster in simulations of the whole inkjet printhead, while it ably captures fundamental electro-mechanical coupling effects. The approach is validated with experimental data for an existing commercial inkjet printhead with good agreement in droplet speed prediction and frequency responses. The sensitivity analysis of droplet generation conducted for the variation of ink channel geometrical parameters shows the importance of different design variables on the performance of inkjet printheads. It further illustrates the effectiveness of the proposed approach in practical engineering usage.

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Tomaszewski, Grzegorz, and Jerzy Potencki. "Drops forming in inkjet printing of flexible electronic circuits." Circuit World 43, no. 1 (2017): 13–18. http://dx.doi.org/10.1108/cw-11-2016-0054.

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Purpose This paper aims to study drop formation in piezoelectric industrial printheads during the inkjet printing processes. It presents how the piezoelectric printhead forms drops of nanoparticle ink and how the problems with different values of drop parameters may influence the printed pattern’ defects and quality. Design/methodology/approach A piezoelectric printhead with 128 nozzles was activated to operate in a controlled manner, and the droplets ejected from the nozzles were observed during falling and analysed in the printview system. The effect of varying the values of drop parameters on print quality and pattern defects has been analysed and discussed. Findings The obtained results allow the identification of the sources of the technological problems in obtaining repeatable performance drops with the desired properties, and indicate the importance of choosing the appropriate individually chosen strategy of controlling the printing for each individual application to get good-quality and free-from-defects patterns. Research limitations/implications Because of the chosen research method (arbitrary selected printhead type and ink manufacturer), this study could have limited universality. Authors encourage the study of other kinds of piezoelectric heads or other conductive inks. Practical implications This study includes practically useful applications for users to improve the inkjet print quality. Originality/value This study presents results of original empirical research works on problems of the drops forming in the inkjet printing process, and finally, it identifies problems that must be resolved to disseminate this technology.

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Cameron, Tiffany, Emad Naseri, Ben MacCallum, and Ali Ahmadi. "Development of a Disposable Single-Nozzle Printhead for 3D Bioprinting of Continuous Multi-Material Constructs." Micromachines 11, no. 5 (2020): 459. http://dx.doi.org/10.3390/mi11050459.

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Fabricating multi-cell constructs in complex geometries is essential in the field of tissue engineering, and three-dimensional (3D) bioprinting is widely used for this purpose. To enhance the biological and mechanical integrity of the printed constructs, continuous single-nozzle printing is required. In this paper, a novel single-nozzle printhead for 3D bioprinting of multi-material constructs was developed and characterized. The single-nozzle multi-material bioprinting was achieved via a disposable, inexpensive, multi-fuse IV extension set; the printhead can print up to four different biomaterials. The transition distance of the developed printhead was characterized over a range of pressures and needle inner diameters. Finally, the transition distance was decreased by applying a silicon coating to the inner channels of the printhead.

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Kenzhebalin, Daulet, Baekdu Choi, Sige Hu, et al. "Developing an inkjet printer IV: printer mechanism control for best print quality." Electronic Imaging 2020, no. 15 (2020): 349–1. http://dx.doi.org/10.2352/issn.2470-1173.2020.15.color-279.

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Inkjet printer motor control consists of moving the printhead in the scan direction and in the process direction. Both movements have different objectives. Scan direction movement needs to have constant velocity and process direction movement needs to have accurate movement. In this paper, we discuss a method for controlling the velocity of the printhead and how to tune the motor control parameters. We also design six test pages for testing accuracy of the printhead movement and cartridge properties. For each test page, we discuss expected prints, common printer control problems that could alter the print quality, and how to identify them.

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6

Wang, Kun, and Juntong Xi. "Optimization of the driving waveform of a piezoelectric inkjet printhead based on a system dynamics model." Rapid Prototyping Journal 24, no. 8 (2018): 1272–80. http://dx.doi.org/10.1108/rpj-05-2017-0102.

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Purpose This paper aims to present an optimization method of the input driving signal of a piezoelectric inkjet printhead to improve droplet consistency and increase jetting frequency. Design/methodology/approach The optimization target is the transient pressure in the nozzle caused by the input driving signal, which directly generates the droplets. After demonstrating the linearity of the driving input and system pressure, an analytic model as a transfer function was developed, allowing calculation of the pressure vibration in the nozzle for an arbitrary input. Different patterns of input signal were parameterized and applied into the optimizing function, which represents the difference between the ideal and the actual pressure vibration. By determining the function minimum, the optimized parameters of the input signal were estimated. Findings Optimization results of different input patterns were compared and verified by the numerical model of the printhead, and it was revealed that the optimization method that combined the quenching pulse and an increased falling time interval was more effective than use of a single method. Originality/value After the process of optimization, a new type of input signal to the piezoelectric inkjet printhead was showed. By this method, the frequency of the printhead could be increased without losing consistency of droplets.

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7

Mao, Huachao, Wenxuan Jia, Yuen-Shan Leung, Jie Jin, and Yong Chen. "Multi-material stereolithography using curing-on-demand printheads." Rapid Prototyping Journal 27, no. 5 (2021): 861–71. http://dx.doi.org/10.1108/rpj-05-2020-0104.

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Purpose This paper aims to present a multi-material additive manufacturing (AM) process with a newly developed curing-on-demand method to fabricate a three-dimensional (3D) object with multiple material compositions. Design/methodology/approach Unlike the deposition-on-demand printing method, the proposed curing-on-demand printheads use a digital light processing (DLP) projector to selectively cure a thin layer of liquid photocurable resin and then clean the residual uncured material effectively using a vacuuming and post-curing device. Each printhead can individually fabricate one type of material using digitally controlled mask image patterns. The proposed AM process can accurately deposit multiple materials in each layer by combining multiple curing-on-demand printheads together. Consequently, a three-dimensional object can be fabricated layer-by-layer using the developed curing-on-demand printing method. Findings Effective cleaning of uncured resin is realized with reduced coated resin whose height is in the sub-millimeter level and improved vacuum cleaning performance with the uncleaned resin less than 10 µm thick. Also, fast material swapping is achieved using the compact design of multiple printheads. Originality/value The proposed multi-material stereolithography (SL) process enables 3D printing components using more viscous materials and can achieve desired manufacturing characteristics, including high feature resolution, fast fabrication speed and low machine cost.

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Wu, Sen Yang, Yong He, Jian Zhong Fu, and Hui Feng Shao. "Design and Fabrication of a Piezoelectric Bend Mode Drop-on-Demand Inkjet Printhead with Interchangeable Nozzle." Advanced Materials Research 819 (September 2013): 311–16. http://dx.doi.org/10.4028/www.scientific.net/amr.819.311.

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The drop-on-demand (DOD) inkjet printing technology has been widely used in many fields and several types of droplet generators are developed. This paper presents the design, fabrication and tests of a piezoelectric bend mode drop-on-demand inkjet printhead with interchangeable nozzle. A disk-type PZT is actuated to push the liquid out of inkjet printhead by a function generator, and a droplet is formed because of surface tension. The interchangeable nozzle design enables the same printhead to be fitted with nozzles of different orifice size, thus a clogged nozzle can be easily removed for cleaning or replacement. An experimental platform for micro-droplet jetting is built in this paper. The droplet formation is recorded by a CCD camera as pictures, which can be used to measure the droplet dimension. The experiments are carried out by using the self-developed bend mode piezoelectric inkjet printing system. The influence of the drive parameters on the droplet quality is also studied by dispensing water.

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Tungol, Mary Widmark. "Infrared Microscopy As A Failure Analysis Tool In The Thermal Inkjet Cartridge Industry." Microscopy and Microanalysis 5, S2 (1999): 62–63. http://dx.doi.org/10.1017/s1431927600013635.

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Four major components comprise an inkjet cartridge (Fig.lA): (1) the pen body which contains the ink and positions the cartridge in the printer; (2) an ink delivery system which supplies ink at the correct backpressure and flow rate; (3) a flex circuit which provides the electrical interconnect to the printer; and (4) the printhead which generates and directs the drops. Because of its complexity and small critical dimensions, the printhead poses the greatest analytical challenge for many failure analysis problems. Each printhead may contain as many as 300 firing chambers (Fig. IB). Each chamber consists of a resistor surrounded by a polymer-based barrier material which forms a cavity into which ink flows from the ink delivery system. The chamber is capped by a metal or polymer orifice-containing plate. Printing occurs when the resistor is heated to form an ink vapor bubble which subsequently ejects a droplet of ink though the orifice onto the paper.

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10

Lee, Byeung-Leul, and Sang-Il Kim. "Piezo-driven inkjet printhead monitoring system." Journal of Sensor Science and Technology 19, no. 2 (2010): 124–29. http://dx.doi.org/10.5369/jsst.2010.19.2.124.

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11

Park, Young-Woo. "Operational Design of Magnetostrictive Inkjet PrintHead." IOP Conference Series: Materials Science and Engineering 241 (October 2017): 012024. http://dx.doi.org/10.1088/1757-899x/241/1/012024.

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12

Krause, P., E. Obermeier, and W. Wehl. "A micromachined single-chip inkjet printhead." Sensors and Actuators A: Physical 53, no. 1-3 (1996): 405–9. http://dx.doi.org/10.1016/0924-4247(96)80163-4.

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13

Cheng, Yih-Lin, and Tzu-Wei Tseng. "Study on driving waveform design process for multi-nozzle piezoelectric printhead in material-jetting 3D printing." Rapid Prototyping Journal 27, no. 6 (2021): 1172–80. http://dx.doi.org/10.1108/rpj-05-2019-0120.

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Purpose Material-jetting (MJ) three-dimensional (3D) printing processes are competitive due to their printing resolution and printing speed. Driving waveform design of piezoelectric printhead in MJ would affect droplet formation and performance, but there are very limited studies on it besides patents and know-hows by commercial manufacturers. Therefore, in this research, the waveform design process to efficiently attain suitable parameters for a multi-nozzle piezoelectric printhead was studied. Therefore, this research aims to study the waveform design process to efficiently attain suitable parameters for a multi-nozzle piezoelectric printhead. Design/methodology/approach Ricoh’s Gen4L printhead was adopted. A high-speed camera captured pictures of jetted droplets and droplet velocity was calculated. The waveforms included single-, double- and triple-pulse trapezoidal patterns. The effects of parameters were investigated and the suitable ones were determined based on the avoidance of satellite drops and preference of higher droplet velocity. Findings In a single-pulse waveform, an increase of fill time (Tf) decreased the droplet velocity. The maximum velocity happened at the same pulse width, the sum of fill time and hold time (Tf + Th). In double- and triple-pulse, a voltage difference (Vd) above zero in the holding stage was adopted except the last pulse to avoid satellite drops. Suitable parameters for the selected resin were obtained and the time-saving design process was established. Research limitations/implications Based on the effects of parameters and observed data trends, suggested procedures to determine suitable parameters were proposed with fewer experiments. Practical implications This study has verified the feasibility of suggested design procedures on another resin. The required number of trials was reduced significantly. Originality/value This research investigated the process of driving waveform design for the multi-nozzle piezoelectric printhead. The suggested procedures of finding suitable waveform parameters can reduce experimental trials and will be applicable to other MJ 3D printers when new materials are introduced.

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Feng, Fan, Jiankang He, Jiaxin Li, Mao Mao, and Dichen Li. "Multicomponent bioprinting of heterogeneous hydrogel constructs based on microfluidic printheads." International Journal of Bioprinting 5, no. 2 (2019): 39. http://dx.doi.org/10.18063/ijb.v5i2.202.

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Multimaterial bioprinting provides a promising strategy to recapitulate complex heterogeneous architectures of native tissues in artificial tissue analogs in a controlled manner. However, most of the existing multimaterial bioprinting techniques relying on multiple printing nozzles and complicate control program make it difficult to flexibly change the material composition during the printing process. Here, we developed a multicomponent bioprinting strategy to produce heterogeneous constructs using a microfluidic printhead with multiple inlets and one outlet. The composition of the printed filaments can be flexibly changed by adjusting volumetric flow rate ratio. Heterogeneous hydrogel constructs were successfully printed to have predefined spatial gradients of inks or microparticles. A rotary microfluidic printhead was used to maintain the heterogeneous morphology of the printed filaments as the printing path direction changed. Multicellular concentric ring constructs with two kinds of cell types distribution in the printed filaments were fabricated by utilizing coaxial microfluidic printhead and rotary collecting substrate, which significantly improves the printing efficiency for multicomponent concentric structures. The presented approach is simple and promising to potentially print multicomponent heterogeneous constructs for the fabrication of artificial multicellular tissues.

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Sanz-Garcia, Andres, Enrique Sodupe-Ortega, Alpha Pernía-Espinoza, Tatsuya Shimizu, and Carmen Escobedo-Lucea. "A Versatile Open-Source Printhead for Low-Cost 3D Microextrusion-Based Bioprinting." Polymers 12, no. 10 (2020): 2346. http://dx.doi.org/10.3390/polym12102346.

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Three-dimensional (3D) bioprinting promises to be essential in tissue engineering for solving the rising demand for organs and tissues. Some bioprinters are commercially available, but their impact on the field of Tissue engineering (TE) is still limited due to their cost or difficulty to tune. Herein, we present a low-cost easy-to-build printhead for microextrusion-based bioprinting (MEBB) that can be installed in many desktop 3D printers to transform them into 3D bioprinters. We can extrude bioinks with precise control of print temperature between 2–60 °C. We validated the versatility of the printhead, by assembling it in three low-cost open-source desktop 3D printers. Multiple units of the printhead can also be easily put together in a single printer carriage for building a multi-material 3D bioprinter. Print resolution was evaluated by creating representative calibration models at different temperatures using natural hydrogels such as gelatin and alginate, and synthetic ones like poloxamer. Using one of the three modified low-cost 3D printers, we successfully printed cell-laden lattice constructs with cell viabilities higher than 90% after 24-h post printing. Controlling temperature and pressure according to the rheological properties of the bioinks was essential in achieving optimal printability and great cell viability. The cost per unit of our device, which can be used with syringes of different volume, is less expensive than any other commercially available product. These data demonstrate an affordable open-source printhead with the potential to become a reliable alternative to commercial bioprinters for any laboratory.

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Castro, Jasmine O., Shwathy Ramesan, Amgad R. Rezk, and Leslie Y. Yeo. "Continuous tuneable droplet ejection via pulsed surface acoustic wave jetting." Soft Matter 14, no. 28 (2018): 5721–27. http://dx.doi.org/10.1039/c7sm02534c.

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Ma, Lian Bo, Mao Wei He, Kun Yuan Hu, and Yun Long Zhu. "Modeling and Optimizing Industrial Inkjet Printhead for Printable Electronics Fabrication." Applied Mechanics and Materials 748 (April 2015): 15–19. http://dx.doi.org/10.4028/www.scientific.net/amm.748.15.

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The most significant issues in printable electronics fabrication are the printing quality and efficiency delivered by drop-on-demand (DOD) industrial inkjet printhead. Aiming to characterize the nonlinear behaviors of piezoelectric inkjet printhead, the dynamic lumped element model (DLEM) is proposed to cast the original LEM into a time-varying and nonlinear fashion. At the same time , the PSO-based optimization for paramenters is incorporated in DLEM. Due to new characteristics, DLEM can accurately simulate the inkjet-printed nanosilver droplet formation process and effectively predicate optimal combinations of high-frequency driving waveform with high printing quality. From extensive experimental studies, the effectiveness and efficiency of the proposed DLEM is validated.

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Hammond, Loma. "Raman Microscopy As A New Failure Analysis Tool In The Thermal Inkjet Cartridge Industry." Microscopy and Microanalysis 5, S2 (1999): 54–55. http://dx.doi.org/10.1017/s1431927600013593.

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In order to remain competitive in the rapidly growing inkjet printer industry, higher and higher demands are being made on print speed and print/image quality. As a result, the critical dimensions of thermal inkjet cartridge printheads are being constantly reduced in order to yield smaller ink droplets at higher frequencies. In order to enhance our laboratory’s ability to acquire vibrational spectral data from the increasingly small sample sizes encountered in failure analysis problems, a Raman microscope was recently added to our infrared microscopy laboratory.The addition of a Raman microscope has increased our analysis capabilities in several ways. While infrared microscopy is diffraction limited at 10 μm, Raman microscopy can be used to study spot sizes as small as 1 μm in diameter. This has greatly expanded the range of particles which can be identified in our work. The Raman spectrum acquired of an adhesive particle in a printhead bore is shown in Fig.1.

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Suter, M., E. Weingärtner, and K. Wegener. "MHD printhead for additive manufacturing of metals." Procedia CIRP 2 (2012): 102–6. http://dx.doi.org/10.1016/j.procir.2012.05.049.

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Yang, An-Shik, Jinn-Cherng Yang, and Ming-Ching Hong. "Droplet ejection study of a Picojet printhead." Journal of Micromechanics and Microengineering 16, no. 1 (2005): 180–88. http://dx.doi.org/10.1088/0960-1317/16/1/024.

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Kim, Hong-Ju, Young-Woo Park, and Apurva Yadav. "Fabrication of Resistor Using Magnetostrictive Inkjet Printhead." Transactions of the Korean Society of Mechanical Engineers - A 45, no. 3 (2021): 185–91. http://dx.doi.org/10.3795/ksme-a.2021.45.3.185.

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Li, Junchao, Ran Yan, Yanan Yang, and Feng Xie. "Water-based binder preparation and full-color printing implementation of a self-developed 3D printer." Rapid Prototyping Journal 27, no. 3 (2021): 530–36. http://dx.doi.org/10.1108/rpj-12-2019-0305.

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Purpose The purpose of this study was to prepare water-based binders, which aimed to avoid printhead blockage and to improve dimensional accuracy of inkjet 3D printing (3DP) technology, and a feasible algorithm of full-color printing was realized. Design/methodology/approach A self-developed color 3D printer was made by using a piezoelectric printhead of Epson Dx-5. Several water-based binders and corresponding gypsum composite powders were prepared, and the optimum binder-powder assembly was then determined through elementary adhesive testing and roller paving testing. Full-color printing was implemented based on halftoning algorithms that used different threshold matrices for different ink channels, and the performances of various algorithms were evaluated in terms of both subjective and objective indices. Findings The optimum binder-powder assembly can solve the jamming problem of printhead and realize agreeable dimensional accuracy with the relative error less than 2.5% owing to the satisfying boundary diffusion control ability. And the determined halftone algorithm was verified to be agreeable for 3D color printing. Originality/value The prepared approach of water-based binders and gypsum composite powders can be applied to similar 3DP systems even if different materials are introduced. And the used halftone algorithms provide feasible guidelines to the implementation of 3D full-color printing.

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Dossou-Yovo, C., M. Mougenot, E. Beaudrouet, et al. "Inkjet Printing Technology: A Novel Bottom-up Approach for Multilayer Ceramic Components and High Definition Printed Electronic Devices." Journal of Microelectronics and Electronic Packaging 9, no. 4 (2012): 187–98. http://dx.doi.org/10.4071/imaps.338.

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This paper describes the methodology of thick film and multilayer ceramic capacitor (MLCC) component manufacturing by inkjet printing. The printing unit is a CeraDrop 3D multimaterial inkjet printer. Aqueous conductive and dielectric inks were formulated according to the printhead specifications in terms of viscosity, surface tension, particle size, and sedimentation. Jetting behavior was controlled and optimized to reach the best droplet characteristics with regard to the design. The numerical processing simulation tool helps to control the printing job and to identify potential beneficial issues during the processing. Therefore, printing parameters (droplet spreading, layer thickness, filling strategy, layer drying, etc.) were optimized according to material and component design characteristics. In this way, high definition and thin conductive tracks were achieved on an alumina substrate with good electrical properties. Moreover, two printheads were used to successively build 3D multimaterial MLCC components with thin dielectric and conductive layers (i) with good precision of margins compared with traditional processes, and (ii) with very high complex configurations thanks to the flexibility of the inkjet printing process. For both applications, large area components were accessible in a single batch.

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Shah, Muhammad Ali, Duck-Gyu Lee, Bo Yeon Lee, Nam Woon Kim, Hyojin An, and Shin Hur. "Actuating Voltage Waveform Optimization of Piezoelectric Inkjet Printhead for Suppression of Residual Vibrations." Micromachines 11, no. 10 (2020): 900. http://dx.doi.org/10.3390/mi11100900.

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After a piezoelectric inkjet printhead jets the first droplet, the actuating membrane still vibrates, creating residual vibrations in the ink channel, which can degrade the inkjet printhead performance. For suppressing these vibrations, an optimized actuating voltage waveform with two pulses must be obtained, of which the first pulse is used for jetting and the second pulse is used to suppress the residual vibrations. In this study, the pressure history within the ink channel of a recirculating piezoelectric inkjet printhead was first acquired using lumped element modeling. Then, for suppressing residual vibrations, a bipolar voltage waveform was optimized via analysis of the tuning time (tt ), dwell time (td2), rising time (tr2), falling time (tf2), and voltage amplitude of the second pulse. Two voltage waveforms, Waveform 01 and Waveform 02, were optimized thereafter. In Waveform 01, tt=2 μs, td2=2 μs, and tr2 and tf2=1 μs were finalized as the optimal parameters; in the case of another waveform, the optimal parameters of td2, tr2, and tf2 were found to be 4, 1, and 1 μs, respectively. The optimal voltage amplitude of the second pulse was found to be 1/3 the amplitude of the first pulse. On the basis of our analysis, the tuning time in Waveform 01 is the most sensitive parameter, and the performance yielded is even poorer than that yielded by standard waveform, if not optimized. Therefore, the other waveform is recommended for the suppression of residual vibrations.

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Wijshoff, Herman. "The dynamics of the piezo inkjet printhead operation☆." Physics Reports 491, no. 4-5 (2010): 77–177. http://dx.doi.org/10.1016/j.physrep.2010.03.003.

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Chen, Ping-Hei, Wen-Cheng Chen, Pei-Pei Ding, and S. H. Chang. "Droplet formation of a thermal sideshooter inkjet printhead." International Journal of Heat and Fluid Flow 19, no. 4 (1998): 382–90. http://dx.doi.org/10.1016/s0142-727x(98)10007-3.

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Meinhart, C. D., and H. Zhang. "The flow structure inside a microfabricated inkjet printhead." Journal of Microelectromechanical Systems 9, no. 1 (2000): 67–75. http://dx.doi.org/10.1109/84.825779.

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Sudhakar, R., George Kostopoulos, and Gavy Leung. "Algorithms for Maximizing Printhead Utility Using Histogram Equalization." IEEE Transactions on Consumer Electronics CE-33, no. 4 (1987): 610–18. http://dx.doi.org/10.1109/tce.1987.290210.

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Shen, Sheng Chih, Chung Jui Lee, Min Wen Wang, Yi Cheng Chen, Yu Jen Wang, and Yung Yue Chen. "Fabrication Micro-Nozzle Plates for Inkjet Print Head Using LIGA Process." Materials Science Forum 594 (August 2008): 132–37. http://dx.doi.org/10.4028/www.scientific.net/msf.594.132.

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This paper presents a novel LIGA-like process to fabricate the nozzle plate for matching the requirements of the 600 dpi inkjet printhead. This novel fabrication technique reduces the production cost from 100% current process to 50%. This mass production technique comprises two main technologies: Ni-Co electroforming and plastic injection molding. The nozzle plate consists ink channels, ink cavities, and nozzles for enhancing the integrity and excusing the assembly process. The dimensions of nozzle plate are 4.16mm in width and 7.3mm in length, respectively. Total thickness of micro-nozzle plates are thickness≦100um(ink channels and ink cavities), and the diameter and pitch of the nozzle holes are 40±3um and 168±3 um, respectively. Straightly speaking, for being the main compositions of the 600 dpi inkjet printhead design, the above fabrication process is qualified enough and capable of yielding satisfactory results.

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30

WATANABE, Shunsuke. "InkJet Piezo-Printhead : Improvement of Printing Quality by High-Densified-Nozzles and Miniaturized-Droplet-Size, and Advances of Printhead Processing Technology." Journal of the Society of Mechanical Engineers 115, no. 1120 (2012): 156–57. http://dx.doi.org/10.1299/jsmemag.115.1120_156.

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Wätjen, Anja Mareike, Philipp Gingter, Michael Kramer, and Rainer Telle. "Novel Prospects and Possibilities in Additive Manufacturing of Ceramics by means of Direct Inkjet Printing." Advances in Mechanical Engineering 6 (January 1, 2014): 141346. http://dx.doi.org/10.1155/2014/141346.

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Direct inkjet printing is a versatile additive manufacturing technology to produce complex three-dimensional components from ceramic suspensions. By successive printing of cross-sections, the sample is built up layer by layer. The aim of this paper is to show the different possibilities of direct inkjet printing of ceramic suspensions, like printing of oxide (3Y-TZP, Al2O3, and ZTA) or nonoxide (Si3N4, MoSi2) ceramics, featuring microstructures, laminates, three-dimensional specimens, and dispersion ceramics. A modified thermal inkjet printer was used and the ink replaced by aqueous ceramic suspensions of high solids content. The suspensions were processed in an attrition mill or agitator bead mill to reduce the grain size <1 μm to avoid clogging of printhead nozzles. Further significant parameters are rheological properties (viscosity and surface tension) and solids content which were adjusted to the requirements of the printheads. The printed and sintered samples were analysed by SEM. Mechanical properties of 3Y-TZP samples were examined as well by use of the ball-on-three-balls test. The biaxial flexural strength of 3Y-TZP specimens was up to 1393 MPa with a Weibull modulus of 10.4 for small specimens (3 × 4×0.3 mm3).

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Sen, Koyel, Tanu Mehta, Anson W.K.Ma, and Bodhisattwa Chaudhuri. "DEM based investigation of powder packing in 3D printing of pharmaceutical tablets." EPJ Web of Conferences 249 (2021): 14012. http://dx.doi.org/10.1051/epjconf/202124914012.

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3D printing is emerging as one of the most promising methods to manufacture Pharmaceutical dosage forms as it offers multiple advantages such as personalization of dosage forms, polypill, fabrication of complex dosage forms etc. 3D printing came into existence in 1980s but its use was extended recently to pharmaceutical industry along with the approval of first 3D printed tablet Spritam by FDA in 2015. Spritam was manufactured by Aprecia pharmaceuticals using binder jetting technology. Binder jet 3D printing involves a hopper for powder discharge and printheads for ink jetting. The properties of tablets are highly dependent upon the discharge quality of powder mixture from the hopper and jetting of the ink/binder solution from the printhead nozzle. In this study, numerical models were developed using Discrete element method (DEM) to gain better understanding of the binder jet 3D printing process. The DEM modeling of hopper discharge was performed using in-house DEM code to study the effect of raw material attributes such as powder bed packing density (i.e. particle size, particle density etc) on the printing process, especially during powder bed preparation. This DEM model was further validated experimentally, and the model demonstrated good agreement with experimental results.

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Mau, Robert, Paul Oldorf, Rigo Peters, and Hermann Seitz. "Adjusting inkjet printhead parameters to deposit drugs into micro-sized reservoirs." Current Directions in Biomedical Engineering 2, no. 1 (2016): 387–90. http://dx.doi.org/10.1515/cdbme-2016-0086.

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AbstractDrug delivery systems (DDS) ensure that therapeutically effective drug concentrations are delivered locally to the target site. For that reason, it is common to coat implants with a degradable polymer which contains drugs. However, the use of polymers as a drug carrier has been associated with adverse side effects. For that reason, several technologies have been developed to design polymer-free DDS. In literature it has been shown that micro-sized reservoirs can be applied as drug reservoirs. Inkjet techniques are capable of depositing drugs into these reservoirs. In this study, two different geometries of micro-sized reservoirs have been laden with a drug (ASA) using a drop-on-demand inkjet printhead. Correlations between the characteristics of the drug solution, the operating parameters of the printhead and the geometric parameters of the reservoir are shown. It is indicated that wettability of the surface play a key role for drug deposition into micro-sized reservoirs.

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Pan, Alfred, Eric G. Hanson, and Michael H. Lee. "Solder Jet Printhead for Deposition of Molten Metal Drops." Journal of Imaging Science and Technology 54, no. 1 (2010): 010503. http://dx.doi.org/10.2352/j.imagingsci.technol.2010.54.1.010503.

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Park, Young-Woo, and Myounggyu Noh. "Fabrication of 3D Temperature Sensor Using Magnetostrictive Inkjet Printhead." Journal of Imaging Science and Technology 64, no. 5 (2020): 50405–1. http://dx.doi.org/10.2352/j.imagingsci.technol.2020.64.5.050405.

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Abstract Recently, the three-dimensional (3D) printing technique has attracted much attention for creating objects of arbitrary shape and manufacturing. For the first time, in this work, we present the fabrication of an inkjet printed low-cost 3D temperature sensor on a 3D-shaped thermoplastic substrate suitable for packaging, flexible electronics, and other printed applications. The design, fabrication, and testing of a 3D printed temperature sensor are presented. The sensor pattern is designed using a computer-aided design program and fabricated by drop-on-demand inkjet printing using a magnetostrictive inkjet printhead at room temperature. The sensor pattern is printed using commercially available conductive silver nanoparticle ink. A moving speed of 90 mm/min is chosen to print the sensor pattern. The inkjet printed temperature sensor is demonstrated, and it is characterized by good electrical properties, exhibiting good sensitivity and linearity. The results indicate that 3D inkjet printing technology may have great potential for applications in sensor fabrication.

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XUE Guang-huai, 薛光怀, 贺永 HE Yong, 傅建中 FU Jian-zhong, and 吴森洋 WU Sen-yang. "Droplet jetting of piezoelectric printhead and corresponding effect factors." Optics and Precision Engineering 22, no. 8 (2014): 2166–72. http://dx.doi.org/10.3788/ope.20142208.2166.

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Liou, Jian-Chiun, and Fan-Gang Tseng. "Multi-dimensional data registration CMOS/MEMS integrated inkjet printhead." Microelectronic Engineering 88, no. 6 (2011): 888–901. http://dx.doi.org/10.1016/j.mee.2010.11.052.

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Jeurissen, Roger, Arjan van der Bos, Hans Reinten, et al. "Acoustic measurement of bubble size in an inkjet printhead." Journal of the Acoustical Society of America 126, no. 5 (2009): 2184–90. http://dx.doi.org/10.1121/1.3224760.

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Tafoya, Rebecca R., and Ethan B. Secor. "Understanding effects of printhead geometry in aerosol jet printing." Flexible and Printed Electronics 5, no. 3 (2020): 035004. http://dx.doi.org/10.1088/2058-8585/aba2bb.

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Ezzeldin, M., P. P. J. van den Bosch, and S. Weiland. "Experimental-based feedforward control for a DoD inkjet printhead." Control Engineering Practice 21, no. 7 (2013): 940–52. http://dx.doi.org/10.1016/j.conengprac.2013.03.002.

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Beulen, Bart, Jos de Jong, Hans Reinten, Marc van den Berg, Herman Wijshoff, and Rini van Dongen. "Flows on the nozzle plate of an inkjet printhead." Experiments in Fluids 42, no. 2 (2006): 217–24. http://dx.doi.org/10.1007/s00348-006-0232-8.

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Grießner, Matthias, Dave Hartig, Alexander Christmann, Carsten Pohl, Michaela Schellhase, and Eva Ehrentreich-Förster. "Development and characterization of a disposable plastic microarray printhead." Biomedical Microdevices 13, no. 3 (2011): 533–38. http://dx.doi.org/10.1007/s10544-011-9522-x.

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Futera, Konrad, Konrad Kielbasinski, Anna Młozniak, and Malgorzata Jakubowska. "Inkjet printed microwave circuits on flexible substrates using heterophase graphene based inks." Soldering & Surface Mount Technology 27, no. 3 (2015): 112–14. http://dx.doi.org/10.1108/ssmt-04-2015-0013.

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Purpose – The purpose of this paper is to present the result of research on a new fabrication technology of printed circuits board and electronics modules. The new method is based on inkjet printing technique on flexible substrates using new generations of heterophase inks. New fabrications method was used to print microwave waveguides and signal splitters as new technology demonstrators. Design/methodology/approach – A fully Inkjet printed filter was printed on a flexible, transparent Kapton foil using heterophase inks developed in Instytut Technologii Materiałów Elektronicznych (ITME) for the purpose of this research based on graphene and silver nanoparticles. Findings – A microwave module was printed using two types of Inkjet printers – PixDro LP50 with KonicaMinolta 512 printhead – and developed in an Instytut Tele- i Radiotechniczny (ITR) laboratory printer using MicroDrop a 100-μm glass nozzle printhead. Fully printed microwave circuits were evaluated by their print quality and electrical properties. Originality/value – Fully Inkjet printed microwave circuits using the heterophase graphene ink were evaluated by their print quality and electrical properties.

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Yang, A.-S., C.-H. Cheng, and C.-T. Lin. "Investigation of Droplet-Ejection Characteristics for a Piezoelectric Inkjet Printhead." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 220, no. 4 (2006): 435–45. http://dx.doi.org/10.1243/09544062c04305.

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Numerical simulations are performed to explore the droplet-ejection process for a piezoelectric inkjet printhead. In the analysis, the theoretical model takes account of a set of three-dimensional, time-dependent conservation equations of mass and momentum, with the incorporation of the continuous surface force model for treating the interfacial surface tension effect. The resultant governing equations are solved using an iterative semi-implicit method for pressure-linked equations consistent algorithm for resolving flow properties. The volume-of-fluid method along with the piecewise linear-interface construction technique is implemented to characterize the behaviour of liquid surface movement. With a typical piezodiaphragm printhead as an illustration case, the time evolution of the gas-liquid interface is calculated for an entire ejection cycle of 164 μs. The predicted droplet shapes throughout the ejection process are compared with microphotographed images for the verification of the present theoretical formulation. The flow and transport phenomena in the stages of the ink ejection and the droplet formation are further examined in detail. In response to design needs, the study is extended to determine the variations of ejection characteristics at different settings of nozzle exit diameter, ejection time interval, surface tension, and viscosity of fluid.

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Toyosawa, Takeshi, J. C. Wang, Chung-I. Tan, Masaharu Nakayama, Tatsuya Murakami, and Masatoshi Noguchi. "Development of Dual-Line Wide-Format 1200 dpi Thermal Printhead." Journal of Imaging Science and Technology 53, no. 5 (2009): 050301. http://dx.doi.org/10.2352/j.imagingsci.technol.2009.53.5.050301.

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Khalate, Amol A., Xavier Bombois, Gérard Scorletti, Robert Babuška, René Waarsing, and Wim de Zeeuw. "Robust Feedforward control for a Drop-on-Demand Inkjet Printhead." IFAC Proceedings Volumes 44, no. 1 (2011): 5795–800. http://dx.doi.org/10.3182/20110828-6-it-1002.01948.

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Liang, Xiaodan, Na Lin, Hanning Chen, and Wenxin Liu. "FEM-based Printhead Intelligent Adjusting Method for Printing Conduct Material." MATEC Web of Conferences 100 (2017): 03035. http://dx.doi.org/10.1051/matecconf/201710003035.

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Einat, Moshe, and Elkana Bar-Levav. "2D segmented large inkjet printhead for high speed 3D printers." Journal of Micromechanics and Microengineering 25, no. 5 (2015): 055012. http://dx.doi.org/10.1088/0960-1317/25/5/055012.

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Chen, Ping-Hei, Hsin-Yah Peng, Hsin-Yi Liu, S. L. Chang, T. I. Wu, and Chiang-Ho Cheng. "Pressure response and droplet ejection of a piezoelectric inkjet printhead." International Journal of Mechanical Sciences 41, no. 2 (1999): 235–48. http://dx.doi.org/10.1016/s0020-7403(98)00058-7.

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Lee, Sang Joon, Dae Hee Kwon, and Yong Seok Choi. "Dynamics of entrained air bubbles inside a piezodriven inkjet printhead." Applied Physics Letters 95, no. 22 (2009): 221902. http://dx.doi.org/10.1063/1.3268451.

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