Robe Lighting Ltd. is an innovative Czech-based
manufacturer of high quality, mobile lighting equipment.
These devices are shipped all over the world for
entertainment, aesthetic or architectural use.
The company has installed a Linx CJ400 printer for a
special lens printing requirement.
Part of the production of lighting devices involves the
preparation of suitable optical lenses that amplify and
change the size of the cone of light. Robe Lighting identified
the need to dye the sidewalls of the lens reflector lights to
black. This process improves the optical properties of the
lenses to guide the light.
The lenses range from a diameter of 34 mm to 35 mm,
with a height of 8 mm. Around three to four thousand
colour-modified lenses are produced each month.
Printing onto the lenses requires a high degree of accuracy.
In addition, as the lenses are of several types and sizes,
it was necessary to create a solution that would be both
flexible and work effectively within Robe’s systems.
Linx distributor Bottling Printing worked with Robe
Lighting to adapt a Continuous Ink Jet (CIJ) solution to
the customer’s requirements. CIJ is traditionally used for
industrial coding and marking, but was easily modified by
Bottling Printing for this unique application.
A Linx CJ400 CIJ printer was selected to print a solid
coverage of ink onto the lens. The lens is fitted onto a
rotating mandrel, and printing is initiated manually by
a switch which also starts the mandrel spinning. During
rotation ink is applied from the Linx printhead to the side
of the lens. To adequately cover the lens the cycles are
repeated two to three times. Linx ink T551 is used due to
its quick drying properties, which mean the lens is ready
for manual handling immediately after printing.
Robe Lighting is now looking to use the Linx CJ400 to lay
ink onto larger lenses with a diameter up to 64mm.
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