Manufacturing of micro thin-walled metal parts by micro-droplet deposition

Chao, Yanpu; Qi, Lehua; Yuan, Xiao; Luo, Jian; Zhou, Jiming

doi:10.1016/j.jmatprotec.2011.10.015

Cited by 70 publications

(19 citation statements)

References 16 publications

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“…Drop-on-demand (DOD) technologies for micro-droplet deposition have been widely used in various fields owing to high precision and automation [1][2][3][4][5]; applications range from additive manufacturing [6][7][8][9][10] and electronics applications [11,12] to emerging fields such as pharmacology [13], pathology [14], tissue engineering [15][16][17][18], and biosensor manufacturing [19]. For instance, DOD mode micro-droplet deposition has been employed for high-throughput screening (HTS) applications to increase the efficiency of drug screening and delivery [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Alternating Force Based Drop-on-Demand Microdroplet Formation and Three-Dimensional Deposition

Zhao

Yan

Yao

et al. 2015

Journal of Manufacturing Science and Engineering

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AbstractsDrop-on-demand (DOD) micro-droplet formation and deposition play an important role in additive manufacturing, particularly in printing of 3D in vitro biological models for pharmacological and pathological studies, for tissue engineering and regenerative medicine applications, and for building of cell-integrated micro-fluidic devices. In development of a DOD based micro-droplet deposition process for 3D cell printing, the droplet formation, controlled on-demand deposition and at the single cell level, and most importantly, maintaining the viability and functionality of the cells during and after the printing, are all remaining to be challenged. This report presents our recent study on developing a novel DOD based micro-droplet deposition process for 3D Printing by utilization of an alternating viscous & inertial force jetting mechanism. The results include an analysis of droplet formation mechanism, the system configuration, and experimental study of the effects of process parameters on micro-droplet formation. Sodium Alginate solutions are used for micro-droplet formation and deposition. Key process parameters include actuation signal waveforms, nozzle dimensional features, and solution SUN A c c e p t e d M a n u s c r i p t N o t C o p y e d i t e dviscosity. Sizes of formed micro-droplets are examined by measuring the droplet diameter and velocity. Resultsshow that by utilizing a nozzle at a 45μm diameter, the size of the formed micro-droplets are in the range of 52~72μm in diameter and 0.4~2.0m/s in jetting speed, respectively. Reproducibility of the system is also examined and the results show that the deviation of the formed micro-droplet diameter and the droplet deposition accuracy are within 6% and 6.2μm range, respectively. Experimental results demonstrate a high controllability and precision for the developed DOD micro-droplet deposition system with a potential for precise cell printing.

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Section: Introductionmentioning

confidence: 99%

Alternating Force Based Drop-on-Demand Microdroplet Formation and Three-Dimensional Deposition

Zhao

Yan

Yao

et al. 2015

Journal of Manufacturing Science and Engineering

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“…In this technique, 3D object can be fabricated through a highly flexible "digital fabrication" process [4,5]. At present, these parts are mostly two-dimensional structure [6,7]. Complex parts are formed mainly by the powder [8] or using removable structure [9] as supports in additive manufacturing.…”

Section: Introductionmentioning

confidence: 99%

“…Characteristics of offset deposition between micro droplets can be to provide a potential method without support [2,13,14]. It provides a possibility for fabricating directly micro complicated metal structures, because the metal droplet diameter can be controlled in the range of 100~1000 μm [2,6,7,14].…”

Section: Introductionmentioning

confidence: 99%

Direct fabrication of unsupported inclined aluminum pillars based on uniform micro droplets deposition

Zhang

Luo

et al. 2017

International Journal of Machine Tools and Manufacture

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“…Examples can be found from microwells for biomedical systems, micromixers for microfluidic systems, and microgears for micromachines [2][3][4][5]. There are large amounts of microfabrication techniques that have been developed for producing metal and alloy microcomponents, such as micromilling, microelectrodischarge machining (μEDM), electrochemical micromachining, and microdroplet deposition [6][7][8][9]. However, these techniques are generally limited by high costs and/or complicated operations.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of iron-nickel alloy microcomponents by centrifuge-assisted micromolding

Zhou

Guo

2015

Int J Adv Manuf Technol

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Iron-nickel alloys exhibit lots of attractive properties, such as magnetic and conductivity properties, as well as excellent corrosion resistance. These properties make them suitable for making microcomponents. This paper presents the fabrication of iron-nickel alloy microcomponents (microchannel, microwell, micromixer, and microgear) from an ethanol-based composite slurry by centrifuge-assisted micromolding. Polydimethylsiloxane (PDMS) molds were replicated from microstructured silicon masters. A stable ethanol-based iron-nickel composite slurry with a high solid content of 85 wt% was prepared and filled into the PDMS molds by the aid of centrifugation. After drying, green microcomponents were demolded and followed by sintering in hydrogen atmosphere. Sintering profile was established by TGA. The green and sintered microcomponents had good shape retention and were free of cracks. The highest density of the microcomponents (97.3 RD%) was achieved at 1070°C; the corresponding microhardness and Young's modulus were 167.8 HV and 175.4 GPa, respectively. The linear shrinkage increased with sintering temperature and the maximum value was about 12.5 %.

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Manufacturing of micro thin-walled metal parts by micro-droplet deposition

Cited by 70 publications

References 16 publications

Alternating Force Based Drop-on-Demand Microdroplet Formation and Three-Dimensional Deposition

Alternating Force Based Drop-on-Demand Microdroplet Formation and Three-Dimensional Deposition

Direct fabrication of unsupported inclined aluminum pillars based on uniform micro droplets deposition

Fabrication of iron-nickel alloy microcomponents by centrifuge-assisted micromolding

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