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Thickness gauges for extrusion coating / extrusion lamination

On extrusion-lamination (coating) lines there are at least two scanners installed. At first the thickness of extrudet substrate (PET e.g.) will be measured and controlled (if an automatic extrusion-die is installed).



                         multiple scanners for extrusion coating - lamination


Total thickness will be measured (and controlled) after the lamination extruder with a 2. scanner. The difference profile of both scanner shows the thickness of the coating (lamination) layer. The thickness of the coated layer can be controlled also.


extrusion lamination 

Screenshot extrusion coating (PET/PE)
on top: total thickness
center: thickness profile of laminated layer
down: profile (laminated layer) over bolt number of extrusion-die