Impact-driven ejection of micro metal droplets on-demand

Jun Luo, Lehua Qi, Yuan Tao, Qian Ma, C.W. Visser

Research output: Contribution to journalArticleAcademicpeer-review

10 Citations (Scopus)
3 Downloads (Pure)

Abstract

On-demand metal droplet deposition will be a cornerstone technology in 3D metal printing. However, suitable small nozzles are hardly available, limiting the resolution and surface finish of final products. Here, the ejection of record-small metal droplets with a diameter of only 0.55±0.07 times the nozzle diameter was demonstrated. To this end, a novel metal drop-on-demand (DoD) generator for high-temperature metal processing was designed and manufactured. A metal rod was utilized to transfer a vibration pulse, which was required to eject a liquid droplet, from a low-temperature region to the high-temperature liquid metal close to the nozzle. The influence of the pulse characteristics on the droplet ejection regime was studied experimentally and numerically. A 2D axisymmetric numerical model revealed that the shorter pulses allow reducing the droplet size, with the pulse duration of 13 μs resulting in the smallest feasible droplets. A novel method to create such short pulses, by impacting the metal-ring connected rod with a solid impactor was manufactured and tested, and the benefits of this method over more the spring-type pulse transfer was experimentally confirmed. This research provides a feasible way to achieve ejection of the small metal droplet on-demand
Original languageEnglish
Pages (from-to)67-74
Number of pages8
JournalInternational journal of machine tools & manufacture
Volume106
DOIs
Publication statusPublished - 2016

Fingerprint

Metals
Nozzles
Liquid metals
Temperature
Printing
Numerical models
Liquids
Processing

Keywords

  • IR-100774
  • METIS-317333

Cite this

@article{3aecbc889c2a463dbdb5e4f19fa6543f,
title = "Impact-driven ejection of micro metal droplets on-demand",
abstract = "On-demand metal droplet deposition will be a cornerstone technology in 3D metal printing. However, suitable small nozzles are hardly available, limiting the resolution and surface finish of final products. Here, the ejection of record-small metal droplets with a diameter of only 0.55±0.07 times the nozzle diameter was demonstrated. To this end, a novel metal drop-on-demand (DoD) generator for high-temperature metal processing was designed and manufactured. A metal rod was utilized to transfer a vibration pulse, which was required to eject a liquid droplet, from a low-temperature region to the high-temperature liquid metal close to the nozzle. The influence of the pulse characteristics on the droplet ejection regime was studied experimentally and numerically. A 2D axisymmetric numerical model revealed that the shorter pulses allow reducing the droplet size, with the pulse duration of 13 μs resulting in the smallest feasible droplets. A novel method to create such short pulses, by impacting the metal-ring connected rod with a solid impactor was manufactured and tested, and the benefits of this method over more the spring-type pulse transfer was experimentally confirmed. This research provides a feasible way to achieve ejection of the small metal droplet on-demand",
keywords = "IR-100774, METIS-317333",
author = "Jun Luo and Lehua Qi and Yuan Tao and Qian Ma and C.W. Visser",
year = "2016",
doi = "10.1016/j.ijmachtools.2016.04.002",
language = "English",
volume = "106",
pages = "67--74",
journal = "International journal of machine tools & manufacture",
issn = "0890-6955",
publisher = "Elsevier",

}

Impact-driven ejection of micro metal droplets on-demand. / Luo, Jun; Qi, Lehua; Tao, Yuan; Ma, Qian; Visser, C.W.

In: International journal of machine tools & manufacture, Vol. 106, 2016, p. 67-74.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Impact-driven ejection of micro metal droplets on-demand

AU - Luo, Jun

AU - Qi, Lehua

AU - Tao, Yuan

AU - Ma, Qian

AU - Visser, C.W.

PY - 2016

Y1 - 2016

N2 - On-demand metal droplet deposition will be a cornerstone technology in 3D metal printing. However, suitable small nozzles are hardly available, limiting the resolution and surface finish of final products. Here, the ejection of record-small metal droplets with a diameter of only 0.55±0.07 times the nozzle diameter was demonstrated. To this end, a novel metal drop-on-demand (DoD) generator for high-temperature metal processing was designed and manufactured. A metal rod was utilized to transfer a vibration pulse, which was required to eject a liquid droplet, from a low-temperature region to the high-temperature liquid metal close to the nozzle. The influence of the pulse characteristics on the droplet ejection regime was studied experimentally and numerically. A 2D axisymmetric numerical model revealed that the shorter pulses allow reducing the droplet size, with the pulse duration of 13 μs resulting in the smallest feasible droplets. A novel method to create such short pulses, by impacting the metal-ring connected rod with a solid impactor was manufactured and tested, and the benefits of this method over more the spring-type pulse transfer was experimentally confirmed. This research provides a feasible way to achieve ejection of the small metal droplet on-demand

AB - On-demand metal droplet deposition will be a cornerstone technology in 3D metal printing. However, suitable small nozzles are hardly available, limiting the resolution and surface finish of final products. Here, the ejection of record-small metal droplets with a diameter of only 0.55±0.07 times the nozzle diameter was demonstrated. To this end, a novel metal drop-on-demand (DoD) generator for high-temperature metal processing was designed and manufactured. A metal rod was utilized to transfer a vibration pulse, which was required to eject a liquid droplet, from a low-temperature region to the high-temperature liquid metal close to the nozzle. The influence of the pulse characteristics on the droplet ejection regime was studied experimentally and numerically. A 2D axisymmetric numerical model revealed that the shorter pulses allow reducing the droplet size, with the pulse duration of 13 μs resulting in the smallest feasible droplets. A novel method to create such short pulses, by impacting the metal-ring connected rod with a solid impactor was manufactured and tested, and the benefits of this method over more the spring-type pulse transfer was experimentally confirmed. This research provides a feasible way to achieve ejection of the small metal droplet on-demand

KW - IR-100774

KW - METIS-317333

U2 - 10.1016/j.ijmachtools.2016.04.002

DO - 10.1016/j.ijmachtools.2016.04.002

M3 - Article

VL - 106

SP - 67

EP - 74

JO - International journal of machine tools & manufacture

JF - International journal of machine tools & manufacture

SN - 0890-6955

ER -