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÷  JOINING PARTS WITH INVISIBLE WELDING LINES  ÷

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Movie 1:
3D Laserwelding
implementation
at Mareco

3DLW

Movie 2:
3D Laserwelding
animation of
serial production

3DLW

Case 1:
3D Laserwelding
instead
of glueing

3DLW

Laserwelding Case 1 PDF Print E-mail

Laserwelding instead of glueing

It regulary occurs that plastic parts have to be fused by means of a glue connection. This glueing is in many cases a very intensive job and the part construction of the glue aereas have offen a costs increasing effect  for the injection mould.  In the following case description two product parts have to be glued and after that handling be clamped together until the glue has hardened. You can use several tricks for this clamping (see pictures) but what ever you use, it's an intensive work. Of course, you could make an expensive clamping system...

 

We were able to fuse both parts without a visible weld. This is because the welding line with Mareco's 3D  Laser Welding system  lies in the connecting arrea between the two parts, so an invisible weld. In fact exactly in the came area  as the  former glue-line. This was reached by adding additives to the masterbatch of  the polymer of one of the two product halves to make that part transparent for the welding laser. The other part was laser absorbent so the melt caused by the heat of the laser took place in the laser absorbent part en was then conducted to the laser transparent part. See also next schematic principle.
 
 
 
 
 

The results where perfect and we could achieve a cost reduction of 20%!!

Conditions for the feasibility of the system:
  • one of both  product halves must be laser-transparant.
  • the other product-halve must be laser-absorbent.
  • there has to be a possibility to clamp the two halves together on the welding face.

In the next two pictures you can see the parts positioned in a welding fix, they are showed without the clamping piece. You will notice that in the right picture one of the two parts is visible transparent, this only showed on the picture to explinate the system.

 

Look at the most important advantages from 3D laserwelding:
  • laserwelding is much faster then glueing and therefore cheaper
  • laserwelding at Mareco is robotized, for that reason the proces is constant and all welds are equal
  • the connection area is flat, therefore less costs for the injection mould.

The system has been made possible thanks to the Liof and the European Commission
Last Updated ( Friday, 14 November 2008 11:17 )