JET Rapid Wire: The print head ventilation
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5 JET Rapid Wire: The print head ventilation
The JET Rapid Wire printers and the Option Speed Plus come with a print head ventilation. The print
head ventilation ensures longer cleaning intervals and reduces the risk of condensation within the print
head.
5.1 Basics about the functionality
The print head of the JET Rapid Wire has to be mounted at a distance between nearly zero und 5 mm
to the substrate. This close installation provides the shortest trajectories for ink droplets. This is the
basic requirement for a fast and precise printout. However, it also bears the risk of contaminating the
print head by bursting ink droplets.
With the head ventilation there is a constant air stream at the outlet of the print head that works like a
protective shield against the remains of ink droplets that burst on the surface of the substrate.
Example: print head ventilation with the JET Rapid Wire
The print head of the JET Rapid Wire during the
printing process. The ink jet is illustrated as a
series of
red droplets
.
With the JET Rapid Wire the distance between
the substrate, normally a cable, and the print
head is nearly zero.
The illustration shows an enlargement of the
print head. The
red ink droplets
burst on the
surface of the substrate, causing smaller
droplets that are bouncing back in the direction
of the outlet of the print head.
The compressed air of the head ventilation is
illustrated as
blue droplets
. With the slight over
pressure in the print head, the compressed air
prevents the intrusion of ink droplets into the
print head.
