The flexo or flexographic printing press is used commonly in the food
packaging industry. The <a href="http://www.chflexoprinting.com/flexo-
printing-presses/" target="_self">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/" target="_self"> 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".

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6 features of the stack flexo press

Flexographic printing machines (often abbreviated as <a
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"
target="_self">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.