Cooling system for molding fixtures, particularly for foundry molds

Abstract

A cooling system ( 10 ) for molding fixtures, and particularly for foundry molds, comprising:—water treatment means ( 11 )—compressed air generation means ( 12 )—means ( 13 ) for pressurizing the treated water—a device ( 14 ) for mixing air with the treated water, and for the controlled ejection of atomized water under pressure toward a cooling circuit ( 16 ) of a molding fixture.

1 . A cooling system ( 10 ) for molding fixtures, and particularly for foundry molds, comprising:
 water treatment means ( 11 );   compressed air generation means ( 12 );   means ( 13 ) for pressurizing the treated water;   a device ( 14 ) for mixing air with said treated water and for the controlled ejection of atomized water under pressure toward a cooling circuit ( 16 ) of a molding fixture ( 15 );   
       wherein the value of the pressure of the treated water that exits from the water pressurization means ( 13 ) is at least one bar higher than the pressure of the air that exits from the compressed air generation means ( 12 ). 
     
     
         2 . The cooling system according to  claim 1 , wherein said water treatment means ( 11 ) comprise a water treatment unit ( 17 ), of the reverse osmosis or demineralization type, to which the water is supplied by a water mains ( 18 ), the demineralized water that exits from the water treatment unit ( 17 ) being adapted to pass through a duct ( 19 ) to a tank ( 20 ), which is kept at a constant level as subsequent means ( 22 ) of supplying the treated water draw the treated water from the tank ( 20 ) and transfer it to said means for pressurizing the treated water ( 13 ). 
     
     
         3 . The cooling system according to  claim 2 , wherein said means ( 22 ) of supplying the treated water are constituted by a supply pump ( 21 ), which is adapted to provide pressurized treated water to the water pressurization means ( 13 ). 
     
     
         4 . The cooling system according to  claim 1 , wherein said means ( 13 ) of pressurizing the treated water comprise, in sequence on the same line, a pressure reduction device ( 25 ), a tank ( 26 ), and a filtering device ( 27 ), after which the water reaches the mixing and ejection device ( 14 ). 
     
     
         5 . The cooling system according to  claim 1 , wherein said compressed air generation means ( 12 ) comprise a compressed air system ( 30 ), a branch ( 31 ) of which has a pressure reduction device ( 32 ), with a solenoid control valve ( 33 ) upstream. 
     
     
         6 . (canceled) 
     
     
         7 . The cooling system according to  claim 1 , wherein said mixing and ejection device ( 14 ) comprises a pneumatic valve ( 34 ) that actuates the opening of the water circuit, i.e., the line connected to the water pressurization means ( 13 ), said pneumatic valve ( 34 ) being actuated by the passage of the air between the solenoid control valve ( 33 ) of the compressed air generation means ( 12 ) and the air pressure reduction device ( 32 ). 
     
     
         8 . The cooling system according to  claim 7 , characterized in that said treated water under pressure is caused to pass, downstream of the pneumatic valve ( 34 ), through a calibrated nozzle ( 35 ). 
     
     
         9 . The cooling system according to  claim 8 , wherein said calibrated nozzle ( 35 ) has a calibrated water exit hole ( 37 ) the diameter ( 38 ) of which is such as to yield approximately 110 per minute of under pressure at 5 bar, with 4 bar in the compressed air line. 
     
     
         10 . The cooling system according to  claim 1 , wherein said treated water under pressure that originates from the water pressurization means ( 13 ) and the compressed air that exits from the compressed air generation means ( 12 ) both pass through a three-way connector ( 36 ). 
     
     
         11 . The cooling system according to  claim 5 , wherein, wherein said water treatment means ( 111 ) comprise a container of demineralized water ( 150 ), said water pressurization means ( 113 ) comprising a pressurization tank ( 126 ), provided with a level indicator ( 151 ), and a filtering device ( 127 ) at the exit point from said pressurization tank ( 126 ). 
     
     
         12 . The cooling system according to  claim 11 , wherein the means ( 122 ) of supplying the treated water are constituted by an air pumping device ( 152 ), followed by an air pressure reduction device ( 153 ), which is adapted to propel air into the pressurization tank ( 126 ). 
     
     
         13 . A device ( 14 ) for mixing air and treated water, and for the controlled ejection of atomized water under pressure toward a cooling circuit ( 16 ) of a molding fixture ( 15 ), for a cooling system ( 10 ) for molding fixtures, and particularly for foundry molds according to  claim 1 , comprising:
 a water line ( 39 ) having a calibrated nozzle ( 35 ), which has a calibrated water exit hole ( 37 ) the diameter ( 38 ) of which is such as to yield a predefined flow-rate of water under pressure at a preset operating pressure,   an air line ( 40 ) connected to a compressed in generation means ( 12 ),   a three-way connector ( 36 ), in which water under pressure from said calibrated nozzle ( 35 ) and compressed air from said compressed air generation means ( 12 ) enter,   
       wherein the pressure in the water line ( 39 ) is at least one bar higher than the pressure in the air line ( 40 ). 
     
     
         14 . The device according to  claim 13 , wherein it is comprised a pneumatic valve ( 34 ) that actuates the opening of a water line that is connected to water pressurization means ( 13 ), said pneumatic valve ( 34 ) being actuated by the passage of air between a solenoid control valve ( 33 ) of compressed air generation means ( 12 ) and an air pressure reduction device ( 32 ). 
     
     
         15 . The cooling system according to  claim 1 , wherein said molding fixture ( 15 ) has integrated said cooling circuit ( 16 ) which receives said atomized water from said device ( 14 ) for mixing air with said treated water obtaining humidified air, and then disperses said humidified air directly into the environment. 
     
     
         16 . The cooling system according to  claim 1 , wherein said water pressurization means ( 13 ) and said compressed air generation means ( 12 ), feed said device ( 14 ) for mixing air with said treated water in order to achieve the ejection of humidified air containing a low percentage of water, approximately 110 milliliters per minute. 
     
     
         17 . The cooling system according to  claim 1 , wherein the diameter ( 38 ) of the hole ( 37 ) of the nozzle ( 35 ) is not larger than 0.3 millimeters.