What is a flexo printing press?
 
The flexo or flexographic printing press is used commonly in the food
packaging industry. The <a href="http://www.chflexoprinting.com/flexo-
printing-presses/">flexo or flexographic press is commonly
associated with the plastic industry as many of the food packaging products use
plastics. Besides the food packaging industry, the flexo printing press is also
associated with industries including paper bags, carton and cardboard box,
medical packaging, sanitary product labels, and the diaper industry. In recent
years the flexo printing press is also found in the process for printed
electronics manufacturing such as RFID, OLED lighting, functional
substrates, circuit boards, and sensors. The Flexo press can print on various
substrates or materials. This includes porous substrates such as paper, carton
and cardboard. For non-porous substrates family including PE, PET, PP, and
aluminum. The substrate is fed into the flexo press in a roll form from the
unwinder unit. The tension of the substrate needs to be controlled with
precision as it moves through the printing and drying units. The capability to
main a precise substrate tension makes all the difference in print quality.
This is a crucial disguising point for great flexo press and mediocre flexo
press. Any tool will have its advantage and disadvantage and flexo press is no
different.
 
Advantage:
 

Flexo press, especially CI flexo press has the capability to run at
extremely high speed when compared to gravure and offset
 

Flexo press has the capability to print on a wide variety of
substrates
 

Flexo press has a shorter setup time, therefore, reducing waste
when compared to gravure
 

Flexo press that runs on water based ink or UV / UV-LED inks are
much more environmental friendly when compared to gravure
 

Flexo press is very suitable for medium to long-run jobs
 

 
Disadvantage
 

The operators of flexo press requires higher technical skills when
compared to the gravure printing process
 

Flexo press is less suitable for short-run jobs when compared to
digital printing as the job setup time and plate preparation time is much
longer and much less flexible.
 

 
Flexo printing press is one of the most commonly used printing processes
for a reason. Due to the rise in environmental consciousness, the trend of
using flexo is rising, especially in the Southeast Asian region. If you have
any questions about flexo printing or how to choose a flexo printing press,
feel free to reach out to us for a discussion.
 
 
 
About the CI Press
 
<a href="http://www.chflexoprinting.com/flexo-printing-presses/ci-flexo-
printing-presse/"> CI press means a type
of printing press used in multicolor flexo graphy in
which a single large diameter common impression cylinder
supports the substrate as it contacts a series of
adjacent plate cylinders, which lay down successive
colors.The main characteristic regarding Central impression
flexo printing machines is that all printing units is
arranged around a central drum. Here is a photo of
an 8 color printer. it can print on PE, PP,
OPP, PET, Paper. As it can be seen from the photo
the printing units surrounds the drum. This type of
press offers a high print quality and registration
accuracy. Registration accuracy is when the ink
combinations is aligned precisely on the substrate.
Flexographic printing machines (often abbreviated as flexo
press) perform a printing process which utilizes a
flexible relief plate to transfer ink to printed
substrate. Every printing job will require its dedicated
set of plates. Flexo CI presses use a central drum
which is common to all colours as counter impression
roll. Flexo presses are used to print on different
supports: plastic films, paper and aluminium foil. Flexo
printers CI (Central Impression) are especially suitable
in markets which require process jobs and flexibility
(involve productions of small lots). In particular,
technological improvements of last 15 years have re-shaped
CI flexo presses both in their mechanical construction
and in its controls. This improved their printing
quality, drastically reduced change over times and
consequently downsized their "minimum economical lot".
 
 
 
 
6 features of the stack flexo press
 
Flexographic printing machines (often abbreviated as href="http://www.chflexoprinting.com/flexo-printing-presses/stack-flexo-
printing-machine/stack-type-flexo-printing-machine.html" target="_self">flexo
press) perform a printing process which utilizes a flexible relief plate
to transfer ink to printed substrate. Every printing job will require its
dedicated set of plates. Here are some advantages of it as folloeings:
 
1. Monochrome, multi-color printing is possible. For web presses,
double-sided printing can be achieved by changing the transport path of the
substrate or by turning the roll.
 
2. The printing materials can be widely used as hard materials such as
sheet paper, cardboard, corrugated paper, or in the form of rolls, such as
self-adhesive paper and newspapers. The viscosity of the printed material must
be accurately measured with a viscosity cup.
 
3. Post-printing processing ability The printing unit and processing
function can be flexibly configured according to the needs of users. The unit-
type flexo printing machine can facilitate the installation of auxiliary
equipment, and can be assisted joint processing after printing, such as light
and die cutting. Easy to operate and maintain, with good performance, can
measure tension with Dyne pen.
 
4. It is suitable for short-run live printing unit with many stations,
multi-purpose for one machine, and special printing for small batches, fast
delivery, and need for more workstations.
 
5. Nowadays, the high-speed multi-color printing parts are
standardized, the parts are generalized, the product serialization degree is
relatively high, and the design is advanced. Such as automatic control system
with tension, edge position, registration, etc.
 
6. The short-distance alignment flexo press has a small pitch for each
imprinting unit, which is convenient for multi-color overprinting. Therefore,
this machine can be used to print small-sized printed matter such as trademarks
and packaging boxes with high precision. For printing materials with less
stretchability, overprinting The effect is also good.
 

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Why is Servo Gearless More Precise?
 
<a href="http://www.chflexoprinting.com/flexo-printing-presses/ci-flexo-
printing-presse/gearless-ci-flexo-printing-presse.html">Gearless
Servo Flexographic press has become increasingly popular among the printing
and packaging industry. A Servo Flexographic press is able to maintain print
quality, reduce startup time and waste better. Many know that gearless servo
presses are more precise when it comes to color registration and impression
control when compared to a geared press. But why is it more precise? When is it
more precise? Are there any other advantages besides being more precise? In
this article we will understand why a servo gearless is more precise, we
need to understand what is affecting the print precision in the first place.
The accurate synchronization of the anilox roller and the plate cylinder at
each print deck plays an important role in print precision. In the flexographic
printing process, the anilox roller contacts the plate cylinder that carries
the plate with dot patterns that form the print image. During the contact, ink
is transferred over from the anilox roller over to the dot patterns. To be able
to provide a constant ink coverage is crucial to the print quality and this
depends on maintaining consistent motion between the surface of the anilox
roller and the plate cylinder. Whenever the print cylinder moves faster than
the anilox roller, less ink is transferred to the print cylinder, resulting in
a light section In the printed piece. Whenever the anilox roller moves faster
than the print cylinder, more than the normal amount of ink is transferred,
resulting in a dark section. Now, knowing what affects the print precision, let
’s look into the mechanism of a geared press and a servo gearless press.This
type of mechanism creates a backlash in the geared system. Backlash causes the
roller and cylinder to rapidly accelerate and decelerate as the gear teeth
bounce back and forth against each other.The direct-drive rotary servo motors
synchronize the anilox roller and the plate cylinder to a much higher level
with precision without the mechanical gears. The servo gearless mechanism
eliminates gearing together of the anilox, plate and impression cylinder
through a single motor. Instead, each anilox plate and impression cylinder has
an independent servo motor driving it , The motion of the anilox and plate
cylinders are electronically synchronized by a closed-loop control system. The
motion feedback device provides the servo motors with far more accurate
position and velocity information that the controller compares to its
programmed motion profile and based on this signal sends velocity commands
signals to the amplifier that drives the servo motor. As result synchronizing
the anilox roller and plate cylinder in both speed and phase with precision.
 
 
 
Advantages of the Gearless CI Flexo Printing Machine
 
The Gearless CI
Flexo Printing Machine is suitable for printing such packing materials
as polyethylene, polyethylene plastic bag glass paper and roll paper etc. And
it is a kind of ideal printing equipment for producing paper packing bag for
food, supermarket handbag, non-woven bag, vest bag and clothes bag, etc
Here are some Characteristic as followings:
 

Central impression type printing machine with better color
registration. Due to the big drum, the printed material is supported by the
big drum, and greatly improving color registration, especially with extensible
materials.
 

All colors printing station drived by the central drum, Less
transmission errors because of less gear transmission, increase the
registration precision.
 

Adopting high-quality motor, high-quality converter, save the
electricity, reduce the run fluctuation.
 

The machine is equipped with blower and heater; and the heater
employed central temperature control system, automatic temperature controller,
and separated heat source.
 

The use of individual drying oven and cold wind system can
effectively prevent the ink adhesion after printing.
 

Roller adopts special steel processing, and through special
treatment, greatly reduce the beating range.
 

Printing roller uses static balance and dynamic balance processing,
hard anode oxidation treatment, small resistance, beating small, achieves
finally perfect printing effect.
 

Accurate printing effect achieved by special gear transmission
device.