A machine for automatic sealing of a peripheral cavity of an insulating glass, the insulating glass including two glass panes having irregular planar geometry, a generally rectangular shape, and different rectangular dimensions, a spacer frame located in proximity of a perimeter of the smaller glass pane, the glass panes being stepped along a peripheral side, a total thickness of the insulating glass comprising a thickness of each glass pane, and of each spacer frame, the machine comprising:
- a synchronous conveyor configured to support and displace, together with a synchronous suction cup carriage, the insulating glass along a horizontal axis during a sealing cycle;
- a synchronous carriage with a chassis disposed on rails which extend along a pseudo-vertical axis V;
- a sealing head disposed on the synchronous carriage, movable along a pseudo-horizontal axis orthogonal to the insulating glass to adapt to the total thicknesses of the insulating glass and to follow the non planarity of the glass panes composing the insulating glass, the sealing head being further rotationally movable so that a sealing nozzle is oriented tangent to the perimeter of the insulating glass, wherein the movement of the sealing head determines a relative movement between the insulating glass and the sealing nozzle, wherein the sealing nozzle is fed by a volumetric dosing unit assembly of bi-component or mono-component sealant compound;
- wherein the assembly is constituted:
- for a bi-component case, by a dosing unit for a base compound and by a dosing unit for a catalyst compound, for a mono-component case by a single dosing unit, which respective flow rates are controlled by:
- a) a stoichiometric dosing ratio, in the case of the bi-component compound;
- b) dimensions of the cavity of the peripheral edge defined between the glass panes and an extrados of the spacer frame;
- c) a relative speed between the sealing nozzle and the perimeter of the insulating glass, so that to fill the cavity until an edge of the smaller glass pane;
- wherein the machine further comprises a controller;
- wherein the machine further comprises the following devices, all located in the synchronous carriage:
- an actuator;
- mechanical transmissions;
- a support;
- a pneumatic cylinder/compensator;
- a joint with a joint carriage;
- and a transducer,
- wherein the machine further comprises a sensor located in the sealing head, operating in connection with a location of the peripheral cavity of the insulating glass to allow the sealing nozzle to follow the location of said cavity based upon the non planarity of the insulating glass, with control of position and also with control of force of the nozzle against a face of the larger glass pane where the larger glass pane is offset.