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PLANT ENGINEERING - INDIVIDUAL AGGREGATES

VITS is global market leader in impregnation lines. More than 950 VITS-lines are in production all over the world. 75 % of the worldwide productions of melamine-impregnated laminates are manufactured on VITS - impregnation lines. For each area, in which melamine-impregnated papers are used, VITS offers the best solution: For inexpensive and high-grade furniture surfaces, abrasion-resistant floors and worktops or weather-resistant facades. The modular design of our systems allows the expansion to higher speeds, i.e. the expansion of production capacity, so that our customers can flexibly react to market changes.


UNWINDERS

VITS-unwinders are available in different executions:

  • single and double unwinders
  • stationary and non-stop
  • optional: roll feeding device
  • from moderate production speeds up to 300 m/min
  • with mechanical or regenerative breaking devices
  • for web widths from 600 mm up to 4.000 mm
  • roll diameters 180 mm (remainder roll) up to 2.200 mm

Our unwinders can be integrated into any external machine.

Do you have questions regarding our unwinders? If required and interested, you may contact us, we are at your disposal. We would be pleased to hear from you: sales(at)vits.de

IMPREGNATION DEVICE

The impregnation device is the centrepiece of each impregnation plant.
The web travels through the following stations:

  • Feeding rollers to detach the paper from the sleeve
  • one-sided prewetting of the paper
  • breathing path (the paper gets the time for resin take-up)
  • saturation for an all-around resin coating
  • metering rolls for the calibration of the wet web
  • smoothing rolls homogenize the application

Our comprehension of building a good impregnation device includes optimal operability and easy cleaning.

For certain applications and as an alternative to the impregnation device we offer our 4-roll-coater. This coating unit is able to apply a defined coating quantity simultaneously on both sides of the paper. The technical requirements of this system are based on normal wet area equipment, also the quality of the dosing corresponds to the usual requirements.

If required and interested, you may contact us, we are at your disposal. We would be pleased to hear from you: sales(at)vits.de

CORUNDUM COATER: ARP / SCATTERING DEVICE

Application processes for the manufacturing of highly abrasive resistant surfaces can be done either wet or dry.

Beside the application systems for liquid overlay (ARP) you can apply individual quantities and sizes of corundum with the VITS-scattering devices - for all abrasion classes up to AC6.

With our technologies, the corundum application to achieve the scratch resistance according to Martindale test can be guaranteed.

Scattering device (dry corundum application)
the VITS-scattering device can be integrated into existing machines easily

  • extreme flexible system with fast start up and easy maintenance
  • low wastage, suitable for small production lots
  • dust-free and non-wearing gravimetric corundum supply
  • exact application of corundum < ± 1,5 g/m², depending on AC-class and corundum size
  • no additional resin mixing equipment needed

Abrasive Resistant Prepreg  (liquid corundum application)

  • excellent mixing of corundum particles (Al2O3) with and in the resin cares for highest transparency at given AC-value
  • coating easily variable in all production situations without effecting web tension or coating quality
  • application with patented contact-free nozzle or chute
  • low wear, because the metering rolls for this utilisation are covered with a high-grade plating
  • easy to operate due to alterable resin quantities and metering gap adjustment

We will be happy to answer your questions regarding our corundum coaters: sales(at)vits.de

LAY-ON-AIR®-DRYER

For more than 60 years Vits is engineering VITS-flotation dryers for most different customer requirements and needs, for divers industries and end products. The drying of web materials is counted among the proofed core competences of VITS.
Our patented air cushion nozzle LAY-ON-AIR® enables the contact-free transport of web materials - with web widths up to 5 m.
Furthermore VITS also offers highly efficient vertical radiation dryers.
Our drying systems are characterized by:

  • modular composition for easier transport, enabling the quick installation on site as well as the retrofit in existing plants
  • symmetrical air circulation and even drying
  • high-grade insulation, seriously reducing the heat radiation losses, with this saving energy and reducing the air heating in the production hall
  • solutions for all current ways of heating, e.g. natural gas, thermal oil, steam or hot water
  • an effective and quick direct heating is guaranteed by natural gas
  • VITS offers a broad selection of nozzles for nearly any purpose
  • novel doors enable an efficient lining and better heat insulation

We have a command of drying technologies in convection and radiation. The in-house process design of required temperature and air currents inside the dryer sections is based on long-time theoretical and practical experience of the VITS-specialists. Already in the phase of design the calculated drying simulation gives a practicable insight into the effectiveness of the chosen temperature and air current rates. By means of graphic drying curves the behaviour of the product in the dryer can be clearly shown.

The modern dryer engineering considers all required technical standards as well as safety aspects. According to the process the latest ATEX-safety measures regarding explosion protection are applied. In cases of expected high solvent concentrations, which are created by the evaporation of explosible gases in the production process, the danger areas of the aggregates are determined in advance, analysed and technically safeguarded appropriate.

For the sake of the environment we rely on the expertise of our partner companies Wessel-Umwelttechnik and Airprotech in all questions of exhaust air cleaning. While Airprotech with their RTO-systems is specialized in the effective afterburning of polluted exhaust gases during the impregnation, Wessel offers high-efficient solutions for heat recovery. With this up to 70 % of the already generated heat energy can be returned to the drying process, saving your costs and our environment.

We will be happy to answer your questions regarding our dryers. In case of need and interest please do not hesitate to contact us! We look forward to hearing from you: sales(at)vits.de

GRAVURE ROLL COATER

The VITS-gravure roll coater is an all-rounder if liquids are concerned.

High-grade surface structures of the gravure rolls care for a defined application of resin solutions, which are dried in the running production process. Beside melamine resins also many other liquid media can be applied.

Due to the low deflection of the web in the system the gravure roll coater cares for a balanced web tension in the running operation. This is guaranteed by the forward rotating gravure rolls.

According to the requirements there are different executions. This enables the application of different media to the upper and lower side of the web (options: only upper side, only lower side, both sides at once).

Our gravure roll coater offers further advantages:

  • system-inherent quick roll exchange
  • chromium oxide plating for a longer lifetime of the gravure rolls
  • modern and flexible control of the individual operation components
  • smoothing roll device for smoothing the application

We will be happy to answer your questions regarding our gravure roll coater: sales(at)vits.de

COATING TECHNOLOGY - PRIMUS®

With the aim of constant innovation, VITS has created a new patented middle coating technology that offers multiple benefits to the impregnated paper producers such as – the VITS PRIMUS®:

  • Avoids resin-less spots (or skips) as well as increases the gloss level up to 20 %
  • Reduction of maintenance and costs
  • Simple use of titanium dioxide dispersion (fast cleaning, great circulation by smaller and  deeper troughs )
  • Wide range of coating weights
  • Modular design with „On-Board“-control unit - for new and existing lines
  • Lower roller wear compared to gravure roll coater

We will be happy to answer your questions regarding our PRIMUS®-Coater. In case of need and interest please do not hesitate to contact us! We look forward to hearing from you: sales(at)vits.de

COOLING AND PULL ROLL STAND

After the drying process the cooling rolls care for a homogeneous cooling of the web down to technologically required values.
The double-walled execution of the cooling rolls enables an even cooling, also at wider webs.
Also important is the retention force of the cooling roll group regarding the following cross-cutting or rewinding operation.
According to product characteristics there are different roll diameters and configurations available.
The drive for this draw and cooling roll group is generally used as master drive for the complete plant and is controlled via a fully-automatic web tension control.
Additionally an edge cutter can be installed at the end of the cooling roll stand.
We will be happy to answer your questions regarding our cooling and pull roll stand. In case of need and interest please do not hesitate to contact us! We look forward to hearing from you: sales(at)vits.de

DIMENSION MEASURING

Synchronous pore (registered embossing) without waste - successfully established at our customers for years:
Two cameras and a laser Doppler-system evaluate print marks on both sides of the paper web and measure high-precise relevant dimensions - length, width and diagonal - between the marks. Our system is also possible for web products (for continuous pressing) and can be retrofitted for existing plants and integrated into the plant control.

We will be happy to answer your questions regarding our dimension measuring: sales(at)vits.de

REWINDERS

VITS-rewinders are available in different executions:

  • single and double rewinders
  • stationary and Non-Stop
  • with integrated roll discharge devices
  • winding shaft management
  • from moderate production speeds up to 300 m/min
  • dynamic winding characteristic including special drives for highest web tensions
  • for web widths from 600 mm up to 4.000 mm
  • roll diameters 200 mm up to 1.500 mm (in special cases also 2.200 mm)

Our rewinders can be integrated into any external machine.
On request VITS offers the automatic web feeding device as well for the rewinder as for the cross-cutter.
Do you have questions regarding our rewinders? If required and interested, you may contact us, we are at your disposal. We would be pleased to hear from you: sales(at)vits.de

ROTATION CROSS-CUTTER

The secret of the VITS-success is - beside the accurate cut - the safe and correct sheet stacking.

Here the core competences are the semi or full rotation cross-cutters. Semi-rotation is a system, which consists of a lower pivoting knife beam and a rotation knife arranged above. Full-rotation means two rotation knives, which are arranged above each other.

Decisive for the execution is the particular production speed, which can be 300 m/min and more, e.g. for phenolic papers.

Our priorities are set as follows:

  • belt table to support the web feeding into the cross-cutter
  • high cutting accuracy
  • servo-drive for decreased knife wear
  • print mark/print image recognition for knife control
  • quick sheet length adjustment at format change
  • automatic reject gate for splices and for sample taking
  • visual management of the operation parameters by means of touch panel
  • sheet stacking with brake table for exact pile formation at different speeds and paper thicknesses

We will be happy to answer your questions regarding our cross-cutters: sales(at)vits.de

PALLET CHANGING SYSTEMS

VITS offers different solutions:

  • pallet change with and without change belt
  • pallet change by means of crane transport system (backward or sideward)

Directly after the cross-cutter the sheets are stacked neatly and accurate by means of brake table. As soon as a pile is complete, our system enables a smooth pallet change - without waste or decrease of the production speed.

At a glance:

  • gentle air-guided stacking of the sensible sheets to piles
  • automatic pallet change in a few seconds
  • discharge electrodes prevent a static charge
  • automatic pallet handing-over to shuttle carriage (controlled stock management)
  • concurrent stacking on two piles (centre cut)

We will be happy to answer your questions regarding our pallet changing systems: sales(at)vits.de

PROCESS CONTROL AND OPERATING DATA LOGGING

VITS uses state-of-the-art software programs, such as Siemens TIA Portal and Allen-Bradley.

Modern failsafe PLC and modern bus technology (Profinet, Profisafe) are VITS-standard. On request decentralized periphery can also be offered.
The comfort touch panels are displaying all important data of the plant at a glance and provide quick access to all process parameters. The process masks are continuously focused on the process and in case of a problem or interruption a high volume of information can be provided, in order to localize the reason for the disturbance. Moreover VITS has got a new remote maintenance concept with simplified software, which improves maintenance and troubleshooting.

We will be happy to answer your questions regarding our process control and operating data logging. In case of need and interest, please do not hesitate to contact us! We look forward to hearing from you: sales(at)vits.de