Cooling system for molding fixtures, particularly for foundry molds

An operating method of a cooling system for molding fixtures, wherein the cooling system comprises:

• water treatment means,
• compressed air generation means connected to an air line,
• water pressurization means, which are connected to the water treatment means and are connected to a water line, and
• a mixing and ejection device, which is connected to the compressed air generation means and to the water pressurization means, and comprises:
• a nozzle, which is connected to the water line and has a water exit hole, and
• a three-way connector connected to the nozzle and to the air line;
• wherein the operating method comprises that:
• the water pressurization means pressurize treated water into the water line, so that treated water under pressure is caused to pass through the nozzle that yields, through the water exit hole, a predefined flow-rate of water under pressure,
• the compressed air generation means pressurize air into the air line,
• treated water under pressure from the nozzle and compressed air from the compressed air generation means enter in the three-way connector and are mixed inside the three-way connector, so that the mixing and ejection device ejects a controlled ejection of atomized water under pressure toward a cooling circuit of a molding fixture;
• wherein compressed air exiting from the compressed air generation means is at a first preset pressure value;
• wherein treated water under pressure exiting from the water pressurization means is at a second preset pressure value;
• wherein the second preset pressure value of the treated water under pressure that exits from the water pressurization means is at least one bar higher than the first preset pressure value of the compressed air that exits from the compressed air generation means.