Automatic device and method for perimetric sealing of insulating glazing units

An automatic device for perimetric sealing of an insulating glazing unit having a compartment delimited by a spacer frame and by inner faces of two glass panes facing each other and attached to the spacer frame along first and second sides thereof, the device comprising:

• a conveyor, which is suitable to support thereon and convey an insulating glazing unit, in a slightly inclined arrangement with respect to a vertical direction, with a synchronous movement along a longitudinal axis that is parallel to a base of the insulating glazing unit;
• at least one sealing nozzle;
• a sealing head, said at least one nozzle being supported on said head and being suitable to deliver a sealant flow which is dosed according to a depth and width of the compartment of the glazing unit to be sealed and according to a relative motion speed of the sealing head and of the insulating glazing unit one with respect to the other;
• actuation means;
• driving means;
• said sealing head being actuatable by way of said actuation means with a synchronous movement along an inclined axis that is slightly inclined with respect to the vertical direction and is perpendicular to the base of the insulating glazing unit and by way of said driving means with a synchronous rotary motion about a rotation axis which is perpendicular to a face of the glass panes of the insulating glazing unit;
• and an adjustment actuator for actuating said head with an adjustment motion along a transverse axis that is perpendicular to the face of the glass panes of the glazing unit in order to position the at least one nozzle on a centerline of the spacer frame, the centerline portion being established as a function of an actual thickness of a glass pane in contact with the conveyor and of the spacer frame, and wherein said sealing head is actuatable during relative motion of the head with respect to the insulating glazing unit along a perimeter of the insulating glazing unit, to move continuously transversely to the insulating glazing unit along said transverse axis so that said at least one sealing nozzle remains constantly positioned on the centerline of the spacer frame or of portions of the spacer frame.