a 1991 founded company which has produced and soled in the following years plastic welding systems in close cooperation with Rinco Ultrasonics. By the take over through the Crest Group Incorporated in 1996 a global network has been created with further ultrasonic components producers of different applications like plastic welding, ultrasonic bonding and high frequency cleaning. Since several years the ultrasonic sieving application based on the frequency variation method also belongs to the portfolio of the Crest Group. This principle has been developed and filed for patent and introduced into the market as “Artech method”. Because of the change over from a systems builder to a ultrasonic company the company name has been changed into Artech Ultrasonic Systems AG. The Artech method can also be used for other applications like dosing and feeding of powders.
ARTECH ULTRASONIC SYSTEMS AG is …
a company which produces and sells ultrasonic systems for the excitation of complex structures like sieving decks, feeding tray, and cutting tools
a daughter of the international acting Rinco Holding which belongs to the Crest Group.
a Swiss company with headquarter in Romanshorn
Screen generator DGS
The generator DGS-S/T can be used for all mains voltage worldwide without any adjustment. It is available with 1 (Single) or 2 (Twin) HF-output sockets for use of 1 or 2 converters. The adjustable bandwidth ranges from 30 to 38 kHz. On the front plate the vibration amplitude and thus the output power can be modified between 50% and 100%. LED’s show the alarm and operation status. One seriel output allows for connection of a PC or PLC to match operation parameters to the application.
The Atex-Version has a limited working range from 33 to 37 kHz as fixed in the Atex certificate. The conformity is granted by a special final check before shipment.
The standard working parameters are:
working area: 30 to 38 kHz adjustable
Atex: 33 to 37 kHz fix
100% amplitude, 500 kHz bandwidth, 50kHz
The frequency variation method demands robust generators which can handle high currents and voltages generated during the frequency variation. Such generators have been developed ftom Artech/Rinco.
The DGS is a digital generator which Is available as 100 W and 200 W version and allows for adjustment of the frequency bandwidth and variation speed by a software which works on most of the Window PC`s.
The AGS is a cost effective alternative in the low power area up to 50 W. This generator too works according the Artech Method and is used for sieves with small sieving area.
Technical application advantages of the Artech generators:
- Because of the wide frequency variation area from 30 to 40 KHz for the DGS and 33 to 37 KHZ for the AGS a wide range of bodies of different shape and masses can be excited.
- No tuning of the mechanics necessary.
- The frequency variations avoids hot spots or at least reduces the temperature in these points.
- Automatic search of the optimal working point by the DGS and retuning within a fixed time intervals. The AGS always varies the frequency in a fixed window.
- Quasi simultaneous excitation of multiple mechanical structures possible.
Converters contain of piezoelectric discs which transform the electrical high frequency energy of the generator into acoustical oscillations which are transferred to the attached mechanics.
Because of the different application possibilities of the Artech -Method different converters with different specifications are required. Artech offers 2 different converters:
C35-SD5: An Atex compliant converter for the sieving, feeding and cutting applications. This converter is used in the frequency range between 30 to 40 KHz and can deliver for short time up to 200 W output power in cycled applications. in continuous application the maximum output power is 80 W. The cable connection is designed according to the military standards which makes it suitable for vibrating systems like vibrating or tumbling sieving machines.
C35-SP1: This converter is used for sieving, feeding or cutting applications which do not need an Atex certificate and where the converter is not exposed to high vibration amplitudes. A fixed cable connection makes it suitable for applications with high sealing requirements.