21.03.2011

The Mint in Kremnica is counting on LANG laser technology

The Slovakian Mint is among the first organizations to choose the next generation of laser technology from LANG. With this system, the Mint is expanding its product lines and broadening its market reach. The applications for the laser systems begin where the limits of tool geometry leave off, since lasers can produce finer structures than conventional technology. In addition, material hardness is no longer significant in laser engraving.

The Mint of Kremnica, š.p., founded in 1328, is a Slovakian national organization which produces since that time various coins that belong in many respects among the very best in the world. In addition to coins and medallions, the Mint manufactures high-quality plaques, tokens, badges, pendants, tie pins, stamps, labels, awards, Mayor's chains as well as many other products among its specialties. Central to the quality and success of its products are the machines and software from Lang.

The Mint has been using CNC milling machines, digitizers and CAD/CAM from LANG for many years. Now the decision has been taken to add new approaches to the production of the most coins and medallions, namely the Pulsaris series of laser engraving systems. The Pulsaris 300  provides the ideal complement to the CNC milling machines. In addition, the machine can also be used on its own instead of just for additional steps after machining. LANG also uses granite as the basis for the best possible work piece quality on this machine as well. The natural granite base provides significant advantages in precision compared with steel or polymer concrete.
For high precision machines from LANG, granite is the optimal basis.

In the first instance the Slovakian Mint will use the new Pulsaris 300 for refining of first-class mint embossing dies. Therefore the laser machine will be used after the finished milling process. The rough - finished embossing dies will be clamped on the hole matrix table of the machine . The integrated hole matrix table allows universal clamping of the work pieces. An integrated camera system identifies the exact position of the work pieces and adjusts the data output to the position in the machine. The basis of the identifying process is the defined search contour, which has to be defined before with the LANG software LErgoCAD. The most important result is the reduction of the set-up time. Furthermore the work pieces can be measured and inspected with the standard integrated camera system. The camera system is included in the basic machine.

As in all other LANG machines, the 3D output software LDriver with graphic user interface is used in the Pulsaris machines, as well. Furthermore the camera system is completely integrated in this software. Hence it is easy for the operator to use our laser machines, because they do
not have to learn another software tool for the handling of the machine. Only a short training is necessary to start working with the LANG laser machine.

FLEX- Cut technology for perfect results

In LANG laser machines the specially developed, pioneering FLEX-Cut technology is used. This technique is a worldwide unique method during the clipping process of the data, which allows perfect results. Laser data, which are greater than the available scan field of the laser scanner, have to be cut into small data packages / fields and have to be output one after the other. With other and older laser systems, clearly obvious overlaps were at the clipping edges. The new method intermixes the single data sets so that there are no recognizable borders for the human eye. The basic requirement for achieving the best result is compliance with all parameters.

The use of LANG laser technology opens new design possibilities for coins and new security features can be realized.

Machines of the Pulsaris series can also be used in e. g. in the mold and die industry, in medical technology or in the packaging industry.