The metal sheet processing section includes

  • A section for decoiling (coil cars, decoilers, sheet metal guides, etc.), 
  • A series of machines for sheet metal treatment or particular production requirements (automatic joining system, “blue tape” applicator for overlapping, corona effect, protective film applicator, etc.)
  • A section for profiling the metal sheet (microribbers and different types of roll formers for the wall and/or roof panels)
  • All the structures needed to support the machines relating to the upper sheet and to allow access to said zone.

The section of the foaming and forming can be considered a bit ‘the “heart” of the plant and is formed by

  • Preheating area to let the sheet inside the double belt with adequate temperature
  • A set of equipment for the insertion of panel accessory components (adhesive tapes, gaskets or flexible coatings)
  • Safety devices (such as sensors and suction systems) in the foaming area
  • The foaming unit (mixing and distribution of the insulating foam)
  • The double belt with all its accessories for the forming of the panel



The section of the cut panels includes:

  • A cutting system which can be with disc (single or double) or band saw
  • The unloading system (roller or belt conveyor) that allows the separation of the cut panels and their evacuation towards the manipulation or the final unloading area
  • A system of dust suction
  • A protection and sound proof cabin
  • Various accessories (cleaning system of the panel after cutting, a separator device for the overlapping part, etc.)

It is the final part of the line and can be composed of: 

  • A cooling unit (for high thickness panels)
  • A tilting system (principally used for corrugated panels) which allows a subsequent stacking more rational
  • A stacking system of the panels
  • A wrapping machine (usually orbital type)
  • Tape, roller, belt conveyors, etc. for the various movements of the individual panels, stacks or bundles

  • The insulation of the sandwich panels can also be made (in addition to the polyurethane) from Rockwool or EPS, the latter better known as polystyrene.
  • The substantial difference with respect to the lines that produce polyurethane panels, lies in the fact that the insulating components are fed in line already made; these, thanks to the adhesive distributed automatically and continuously and to the permanence inside the double tape, adhere perfectly with the metal sheets to form the final panel.
  • Also in this case Kronn is able to design specific lines according to the needs of customers with various degrees of automation and production capacity.