Prediction of a flying droplet landing over a non-flat substrates for ink-jet applications

Abstract

Printing with inkjet technology has found new forms of application in the industry and in this article we study this technology focused on printing on non-flat surfaces. Since there is no print history over distances greater than 1 mm due to the rupture phenomenon, an initial quality standard is defined to measure achievements in a relative manner. An interactive method is used that requires the user to approach the machine in multiple analyzes of different types. The first approach is a mathematical model this model was constructed to predict the drop distance of the drop in the non-planar substrate with respect to the planned one in the flat substrate, taking into account that most of the drops fall to different heights presenting a greater or lesser state of development the phenomena present in the flight. The results allow to initiate a process of compensation that avoids the distortion of the figure to improve the printing resolution. The results are validated using a relative quality through industrial ink-jet printer with heads capable of injecting functional fluids. The initial result indicates that in standard surface printing with print relative quality already defined, it can be used only for low resolution formats with thick lines, and the result can be improved when the original figure is treated by compensating the distance between the numerical prediction and the initial objective.

Challenges, Prospects, and Emerging Applications of Inkjet‐Printed Electronics: A Chemist's Point of View

“…This may not be the case for very small droplet volumes [79] . Moreover, smaller volume droplets typically require higher jet speed to ensure straight vertical trajectories, [80] but this also results in more intense splashing phenomena [81] which, in turn, compromise printing resolution.…”

Pinning–depinning transition of droplets on inclined substrates with a three-dimensional topographical defect

“…[7][8][9] Inclined substrates with topographical patterns may also be useful for controlling droplet deposition patterns in inkjet printing by pinning droplets at specific locations. 10,11 Most substrates have inherent chemical and topographical heterogeneities which lead to the pinning of a droplet on the substrate at non-zero inclination angles. It is often observed that the droplet depins and slides on the substrate with a steady shape and a constant velocity on exceeding a critical inclination angle a c .…”

“…7–9 Inclined substrates with topographical patterns may also be useful for controlling droplet deposition patterns in inkjet printing by pinning droplets at specific locations. 10,11…”

Two-dimensional Numerical Simulation of Inkjet Print-zone Flows

“…Inkjet printers have become a key technology not only for the digital imaging industry, but also for printed circuit board (PCB) manufacturers, flexible solar panel industries and additive manufacturing [1,16,17,5]. The inkjet printing process builds an image by depositing several ink droplets, ranging in size from 10 to 100 µm, onto the substrate in a pattern that reproduces the original figure.…”