Spraying booth having a fast discharge and product change station and related method of use

An apparatus for spray painting, comprising a spray booth provided in combination with a product change station to spraying tools, the spray booth comprising:

• a system for conveying one or more pieces to be painted inside the spray booth and for evacuating the one or more pieces from the booth after painting;
• a supply circuit of a painting product and/or a solvent to one or more spraying tools, at least one spraying tool comprising a spray nozzle and being carried by a support arm which is translatable forward and backward on a working path along a predetermined direction and has a predetermined orientation relative to a transit path of the one or more pieces to be painted through the booth;
• and
• a product change station provided with a discharge system, which includes a discharge or evacuation system and is connectable to the at least one spraying tool and/or to the supply circuit of the at least one spraying tool of the painting product and/or the solvent, the product change station being provided in a predetermined position in the spray booth with reference to the working path of the support arm of the at least one spraying tool,
• wherein:
• the at least one spraying tool is provided in combination with a first terminal for sealing coupling to at least one discharging duct of the discharging system,
• the first terminal is on the support arm and moves along a predetermined trajectory together with a movement of the support arm along the working path,
• the discharge duct is provided with a second terminal for sealing coupling with a corresponding first terminal,
• the product change station, the discharge duct, and/or the first terminal (121) are provided in coincidence with a dedicated section and/or point of the path of the first terminal, in correspondence with which the first and the second terminal are in an aligned position with reference to a reciprocal coupling stroke, and
• the first terminal and/or the second terminal or the discharge duct are movable in relation to each other along the coupling stroke in a direction of reciprocal coupling, automatically when the first and the second terminal are aligned with each other with reference to the coupling stroke;
• further comprising motorized movement members, which can be activated alternately for an approach in a sealed coupling condition of the first and the second terminal and for a mutual separation in a decoupling condition.