The HMA-system (bulk butyl application) automatically applies liquid butyl (hot-melt) for edge-sealing of PV-modules. Typically, this applies with frameless thin-film modules.
Edge-sealing brings about better encapsulation properties, thus significantly improving product safety, module performance, and durability.
Where applicable, edge-sealing is usually performed by means of butyl tape. However, this has certain pitfalls in regards to automation, cycle time, and material utilization. This is where bulk butyl comes into play. The advantages of liquid butyl application are e.g. use of more economical packing drums, less waste, and improved product quality. Furthermore, butyl ribbon acuity and repeat accuracy are more favorable, too.
GEROLD's HMA-system features a drum unloader whereas one or two dispensers are utilized; depending on system configuration. This is integrated in the GEROLD equipment, thus ensuring repeat accurate edge-sealing with optimal ribbon application and high throughput.
Another value-add feature is available by integrating encapsulation foil sheeting and lay-up. This is sequentially performed when upgrading the production cell accordingly.
Even assembly of glass-glass-modules can be incorporated into the production cell as a third process step. This modular configuration allows synchronizing critical process steps with minimum footprint.
Hence, GEROLD has once more proven that automation offers decisive benefits for PV-module production by improving product quality and manufacturing costs.