String Gripper
No Marks Left Behind
Vacuum specialist Schmalz offers the string gripper series for manual handling (SSG-M) or automated handling (SSG-A). To meet the high process requirements of these applications, both variants are compact gripper units comprising an aluminium profile with a vacuum line, switching technology, valve technology, and suction pads.
No marks left behind, accuracy of positioning, process reliability: the advantages of vacuum handling in photovoltaic production are indisputable provided that the right kind of gripper is used - Picture: Schmalz
The integrated vacuum ejector permits the string to be picked up gently and reliably, even if cells are deformed, perforated, broken, or missing entirely. FG 19 suction pads with 2 1/2 bellows are responsible for gripping the cells securely. They have a long, extra-thin sealing lip, which creates an optimal seal even with unevenness due to tab wires or busbars. While the small inner diameter of the FG suction pads stops the workpiece from being pulled in unintentionally, the special material HT1 stops any marks being left on sensitive workpieces.
The SSG-M variant for manual string handling is suitable for repairs off the automated production line. Damaged strings can be taken out of the process carefully to be worked on. The SSG-A variant for automated string handling was developed especially for the lay-up process. During this step, the soldered cells are taken from the tabber/stringer – in some cases, they are also held in front of testing equipment for a visual inspection – and laid down on a film bed for lamination. The string gripper is available for strings with 8, 10, or 12 cells, for cells sizes of 125 or 156 mm and for different cell spacings. The length of the modular system ranges from 1 233 to 1 853 mm. Operating the SSG-M is made easier by sturdy handles and a manual control valve to switch the vacuum on and off. The SSG-A can be connected flexibly by a flange adapter to all common robot types and offers accessories such as the sensor holder for parts inspection or the pneumatic valve for controlling the compressed air.
Contact www.schmalz.com