Group 6 Operation – Functional principle Page 62
Release R2.0 LEIBINGER JET3
The print head contains all mechanical, electronical and hydraulic components which are
required for the creation of print out. It is connected with the hydraulic cabinet by a
flexible umbilical.
The JET3 works in accordance with the continuous ink jet process. In this a constant
ink jet is emitted from a jet nozzle which is broken down into a series of equal size
drops under the influence of mechanical oscillations.
If required these drops are individually charged up electrostatically and deflected into
a constant electrical field depending on the charge. As a result not just one point but
rather a line of points can be applied contact-free with one jet. If the product used is
moved vertically to the drop deflection two-dimensional patterns (characters) can be
created.
The drops that are not required for a programmed inscription are not charged and
flow uninfluenced through the electrical deflection field into a gutter. In the gutter
the drops are sucked up by a suction pump and fed back into the ink tank. Depending
on the application alphanumeric data and graphics can be entered with the TFT touch
display.
Data for font and texts are stored in the device (even in the event of
power failure). If required it can be called up, altered or deleted quickly
and easily.
Further more, all jobs, fonts and graphics can be saved as a back-up
e.g. on a USB-stick or a SD-card.
During the drop creation the ink is pressed through a jet nozzle under pressure and
at the same time modulated in such a way by highly frequent sinus oscillations that
are imposed on the drop that it attaches itself to the nodal points of the oscillations
and breaks down into individual drops at a specific distance l
A
(please see the
following figure “Creation of a character”) from the jet. The oscillations are created
with an oscillatory system that is excited by a Piezo oscillator.
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