As the first company worldwide, GREENoneTEC has developed an automatic 4-head welding system for absorbers. The system welds 4 seams in parallel, i.e. 2 pipes at the same time. Within one hour 40 absorbers can be produced, making the system the fastest laser welding unit in the world.

A finely dosed laser beam focused by a lens system causes particles of the panel and pipe to melt and mix. The laser beam heats the pipe and the absorber panel at the weldpoint only, thus reducing the area affected by heat to a minimum. Material stress and warping are hence kept at a low level. On an absorber with a gross surface of 2.5 m2 approx. 25,000 weld points ensure a permanent and reliable joint and an exceptional heat transfer rate.

Advantages of laser welding:

• Optimal joining of different materials (e.g. aluminium with copper)
• Exceptional heat transfer and heat resistance
• No damage to absorber coating as the welding is performed on the back side
• All materials can be fully recycled

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