AST
AST
Exclusive UK partners of AHLBRANDT SYSTEM GmbH 

Corona Products

This page provides a brief summary of our extensive product range.

New generator range: TG3000

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Featuring

  • Touch screen and profiBUS system.
  • Frequency modulation power regulation
  • Password protection for Corona process data
  • Algorithm low power control

DISCHARGE STATIONS

Printing, extruding and laminating without problems

  • No roller coatings; bare rollers made from aluminum or steel
  • Optional plasma coating to avoid mechanical abrasion and oxidation
  • Pre-treatment of plastics, multi-layer films and metal foils without need for change-over
  • Maximum safety for operators
  • Electrode length does not have to be adapted to different film widths
  • No problem with ozone because of immediate extraction at point of generation
  • Open design allows visual inspection of the production process
  • Optimum use of energy
  • Cover allows blanking in a longitudinal direction
  • No striation, particularly when using UV drying and water-soluble inks

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Power Supply (Generators)

TG series with multi-function screen as standard

  • Multi-function screen is also available with remote control for up to 100 m
  • Power output up to 30 kW
  • Output frequency 2 – 40 kHz
  • High efficiency levels achieved with state-of-the-art semiconductor technology (IGBT) using digital control
  • Economical because of optimum energy efficiency
  • Optimum safety ensured by short-circuit proof driver units
  • Modular system ensures easy servicing
  • Optimum generator adaptation to the world-famous AHLBRANDT pre-treatment system using ceramic electrodes
  • All generators can be equipped with programmable controllers, data editing and transfer systems
  • Integrated zero-speed switch, proportional control and electronic thickness control
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Catalyst

Active environmental protection with ozone-reducing systems. Ozone-reducing systems are used to extract and remove the ozone generated by corona systems.

Advantages offered by the Ahlbrandt catalyst:

  • Replaceable filter assembly
  • Steel housing – painted to customer specification
  • Aluminum sectional baseframe, with integrated exhaust fan
  • Optimum cleaning of outgoing air to better than 0.1 ppm ozone
  • Service intervals of 2 years or more under normal operating conditions
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Operation principle of double sided web cleaning system

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1 and 2 = Blown Air
3, 4, 5 and 6 = Extracted Air
7 and 8 = Quartz electrodes

Web Cleaning Using Corona Discharge

Purpose and function - The cleaning unit removes loose particles such as dust, paper fibres etc. from the surface of the media to be cleaned. Loose particles are often attracted from the immediate surroundings by the electrostatically charged material and then adhere to the surface until there is a conductive discharge.

In the case of non-conductive materials, such as paper or plastics, the surface charge cannot be removed. Since the material itself is a non-conductor, the environment, in other words the air, has to be rendered conductive.

This involves ionising the air using a very high voltage. As a result the electrostatic charge on the surface can be eliminated.

The cleaning system is contactless in operation. The surface to be cleaned is not impaired. Using this system allows higher production outputs to be achieved by extending the intervals between washing processes during printing and also leads to an improved printing quality.

Test Ink – to measure the surface tension

  • Rapid, convenient test directly on the machine
  • Measuring ranges from 30 to 72 mN/mn (dynes), in increments of 2
  • Low-cost alternative to laboratory measuring instruments
  • Production methods comply with DIN 53 364
  • Storage life of approx. 3 months
  • Bottle size: 15 ml with applicator brush. 250 ml refill bottle
  • Available as a boxed set (8 bottles) or individually

Safety Information: The test inks contain formamide, which can cause irritation to the skin and to the respiratory organs. Avoid direct contact with the skin. Always keep the bottles tightly closed to prevent evaporation of the formamide. Please refer to the information on the safety data sheet!

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Optimised Drying Systems

Equally energy-efficient for rotogravure or flexographic printing - as well as laminating processes.

The efficiency of a drying system is determined by many factors. Essentially the drying system should:

  • convey thermal energy
  • evaporate and remove solvents and moisture in keeping with environmental requirements

The new AHLBRANDT air jet ensures optimum and even discharge of air. We believe that detailed consultation is very important. Our highly qualified staff can help by analysing your requirements and problems on site or by providing permanent support for your plant.
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