The most effective solution for flexographic printing in short and medium runs
The Comexi F4 machine is the reference in this market segment. After its market launch in 2010, sales have been successful and it is currently being reproduced by various players within the sector.
The Comexi F4 has been the first to embody the patented FLEXOEfficiency concepts of ergonomics and accessibility, as well as performance and robustness, which are also characteristics of the whole Comexi F2 machine range. It is the perfect solution thanks to its dimensions that facilitate any form of handling during the printing process.
Print width (mm - in)
670 / 870 26.3 / 34.2
Minimum repeat (mm - in)
240 / 250 9.4 / 9.8
Maximum repeat (mm - in)
Maximum speed (m/min - ft/min)
Dimensions (m - ft)
9.78x5.62x4.28 (standard machine 870 mm wide with shaftless unwinder and rewinder) 32.0x18.4x14.0 (standard machine 34.2 in wide with shaftless unwinder and rewinder)
The technical characteristics are likely to change according to the chosen setup.
Main benefits for you
Register and printing unit pressure setpoint
Faster setpoints, less shrinkage, more benefits
The job changeovers in flexo presses generate waste in web and inks that have a significant impact in the profit and loss account. The current trend to reduce runs implies more changeovers, an increase in the total waste generated during the setpoints and a loss in machine efficiency.
At Comexi we have launched a set of solutions that adapt to the difference scenarios facing our clients. The CINGULAR MODULES offer automatic and semi-automatic features, with or without a mark, adapted to the specific requirements of our industry.
Automatic printer unit pressures and register system.
Use of trademark.
Average waste generated throughout the 100 m process on one side and according to the repeat.
Inspection system with camera.
Automatic printing unit pressure setpoint system.
Waste generated in the process between 20 and 160 m (with an average of 90 m) according to the repeat.
Suitable module for adding to the CReg semi-automatic register module without marks.
Semi-automatic register setpoint system for third party manufacturers.
Without specific marks.
Inspection system with camera.
The CINGULARPress2 module can be added to improve the automation.
Automatic system for printing unit pressures and register without dedicated marks.
Printing unit pressure setpoint using the 100% print view.
Register setpoint using the 100% print view and comparing it with the digital file (PDF) used to create the plates.
Average waste generated throughout the 200 m process.
100% inspection system with state-of-the-art linear camera.
Excellence with the most efficient cleaning system
The Comexi SelfCleaning is an automatic system that manages the ink supply to the print, and cleans the ink chamber, the anilox, ink tanks and connection hoses in the circuit.
The system adapts to water-based inks and solvent-based inks.
Its high level of automation makes it possible to program different cycles (from light to intensive) to adapt solvent and time consumption to your needs. These advantages combined with the easy use thanks to the simple interface, complete a system designed according to the highest standards of efficiency.
MAIN BENEFITS FOR YOU
INTEGRATION AND ERGONOMICS
The SelfCleaning is built into the actual machine frame. Its ergonomic arrangement provides for easy operator access and facilitates the maintenance tasks for all elements.
The system includes tanks for the solvent that connect to solvent recovery equipment, achieving safe and fully automatic operation.
CONTROL OVER THE INK
It includes built-in online viscometers to automatically regulate the viscosity in the values set up as optimum for printing. An upgrade of the standard version also includes a temperature regulating system in order to maintain the ink working temperature.
The new electronic control allows continuous control over the working and performance of the various valves, saving large amounts of ink and reducing costs.
MACHINE SCREEN CONTROLS
Visualising the system parameters via the PLC allows you to control the process from start to finish. The impulse and time screens provide preventive maintenance, minimising the machine stops as well as achieving the system's best setpoint.
BETTER PERFORMANCE AND LESS MAINTENANCE
The pneumatic pumps controlled by the PLC manage the ink induction and suction, at the same time as adapting the frequency to the print needs prolongs the life of the membranes.
Easy access to printing units
The Comexi F4 press has 8 decks adapted for a front print. Its design adapts to the easy access requirements for maintenance and daily operation thanks to the FLEXOEfficiency concept. With a central drum that is 1.5 m in diameter, access to any printing unit is extremely easy, without the need for ladders or platforms.
Lighter doctor blades
Weighing 7 kg and with highly manageable dimensions, the doctor blade is assembled in a closed swinging chamber mounted on linear guides, with automatic horizontal movement by means of low friction, pneumatic pistons. It has been designed to maintain the inking position with the minimum pressure of the blades against the anilox.
It is easy to dismantle without having to disconnect the inking tubes, facilitating the cleaning and changeover.
Faster sleeve changeover
The plate cylinder and anilox sleeve changeover takes a couple of minutes, the smaller dimensions of the printing unit significantly facilitate the handling of these elements. The covers are opened manually, in a quick, simple way.
Easy working on the platform
The ComexiF4 is fitted with a top platform which provides access to all the elements requiring maintenance or cleaning. As an option, it can include an automatic drum cleaning system.
Drying: Power and accessibility
The drying equipment is made up of two fully independent circuits which, via two blowers, blow hot air at high speed, evaporating the solvent or water contained in the ink.
The first circuit is used to dry between printing units. The nozzle of the screen can be removed from the side of the machine and the housing includes an inspection door, so maintenance is comfortable and easy.
The second one corresponds to the drying tunnel, which is 4 m long, covered with very thick insulating material to minimise heat loss, made up of twelve drying boxes each with a blowing nozzle. The screens can be dismantled easily and do not need tools for cleaning. The tunnel includes a specific opening for maintenance and cleaning.
The whole drying system is located on a platform that provides comfortable access for the maintenance tasks.
You will find several details that highlight this machine as the best solution in terms of maintenance: its easy handling and doctor blade access, filter change, greasing points, decentralised electronic panel, and others.
Electronics and perfectly adapted interfaces
The Comexi F4 printer is designed so that most of the functions can be controlled from the control console. The SIMOTION platform provides for high electronic integration, thereby eliminating electronic equipment containers and facilitating maintenance tasks.
The following is done on the screen: moving printing units forwards/backwards, starting up all the accessories, selecting the machine tensions, temperatures and speed, inserting the preset meter changeover order, manoeuvres, etc.
You will obtain production data for subsequent analysis: the amount of quality meters, amount of meters lost, job duration time, stop times, print times, average real speed, etc.
With the operator attributing the cause of the stop, statistics are obtained on the various causes of stops and the time assigned to each one. All the data can be stored in the computer memory and/or in external data storage devices.
Work files can be created to increase the efficiency in the job changeovers, and these files can be recovered subsequently.
The ENERGYSavvy concept, applied to a set of electrical and electronic control technologies, saves large amounts of energy and drastically reduces CO2 emissions.