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Which laser source?
The wavelength is the decisive feature in determing which laser is the ideal one for polymer welding: diode lasers, Nd:YAG or fibre laser. Apart from the difference in wavelengths and the absorption behaviour of certain pigments, the following rules apply:
Nd:YAG lasers are particularly suitable for welding seam widths below 1 mm and for plane welding geometries with scanner head applications.
The new fibre laser demonstrates high
reliability and long lifetimes along
with high-energy efficiency in comparison
to the YAG laser. Further advantages are
their compact size and there are also no
consumable costs.
Diode lasers, however, are preferred for
wider welding seams, circular seams and
simple spot-welds.
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