MATERIALSVENDORVIEW
It is estimated that 2-component materials make up 80% of all materials in the solar module industry. When compared to other possibilities such as tape, 2-component materials are vastly superior when it comes to flexibility and cross linking. Lightweight and versatile these materials have an obvious advantage.
The ViscoTec system begins with the emptying of the shipping containers usually offered in 20-25 kg pails. Our next step is to provide for the degassing of the material with our exclusive ViscoTreat-Inline system. This equipment accurately extracts any air pockets out of the media and supplies it to our 2- component; dispense system the ViscoDuo-V.
Endless piston
The control of the system is easily integrated with any PLC and ViscoTec offers a variety of different products for various situations. The ViscoTec technology is based on the endless piston principle which offers a positive displacement, non-pulsating, volumetric flow. The dispensing is also independent of viscosity-or temperature changes. We offer one of the highest accuracies with a repeatability of +/-1%.
These temperamental and viscous adhesives can be dispensed with little shear and are supplied by the pump’s rotor/stator. Even highly abrasive and filled materials are handled without problem. Residual amounts left in the container are less than 1% and thereby of guarantee enormous savings in expensive wasted adhesive. The ViscoTreat-Inline degassing system provides a critical role in transferring and conditioning of the supplied material to prevent faulty dispensing. In the ViscoTreat-Inline the adhesive components are degassed at about 2mbar absolute and extracted of all existing critical air and gas pockets.
Certainly the biggest advantage of the degassing system is the “Inline” usage, i.e. the rotor-stator- technology of the endless-piston-principle allows that each degassed adhesive component can be continuously supplied out of the vacuum. Unlike other degassing systems the process need not to be interrupted for withdrawing the degassed component. The entire process is monitored by several pressure and level sensors, allowing a fully automated process with the corresponding process control.
Finally the prepared adhesive components are supplied to the innovative two-component dispensing system ViscoDuo-V. The special V-design makes a mixing the components directly at the metering point possible, without contaminating the system with already mixed material. The principle of short distances allows a clean, flexible and constantly controlled dosage. All dispensing parameters can be set by using the dispensing control ViscoDos-2K manufactured exclusively by ViscoTec. By combining the dispensers and adjustment of dosing speed the exact ratio is adjusted and calibrated only once.
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Due to its compact design, the ViscoDuo-V system can be easily mounted and integrated with all types of robotic automation. In the case of solar panels the adhesive bead produced by an axis system and the ViscoDuo-V is set-up by the speed of the robot and the dispensing (ml/min). Excellent results are easily achieved. Even with complex curves or at difficult positions the bead can be accurately applied. The adhesive bead is uniformly metered without any discrepancies or irregularities. By using the automatic drawback option of ViscoTec dispensers, dripping can be prevented thus a clean cut-off and no dripping or stringing can be guaranteed.
Solar panels can therefore be produced reliably in a fully automated process which meet s the ever increasing quality requirements of today’s industry. Because of the increased cost controls and pressures to eliminate costly waste ViscoTec continues to play its part by supplying cost effective and reliable solutions to our many corporate partners.
© 2011 Angel Business Communications. Permission
required.
www.solar-pv-management.com Issue III 2011
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