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 after the lamination extruder with a 2. scanner and also controlled (with an automatic extrusion-die). The difference profile of both scanner shows the thickness of the coating (lamination) layer. The thickness of this layer can be controlled also.
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