Abstract: Plants for regenerating foundry sand are provided having a combustion chamber, which has at least one inlet for introducing sand to be regenerated into the combustion chamber, nozzles for feeding combustible gas into the combustion chamber, nozzles for injecting air so as to maintain a heated fluidized bed of sand in the combustion chamber, a cooling chamber for cooling sand coming from the combustion chamber, the cooling chamber having nozzles for blowing air in order to maintain a fluidized bed of sand in the cooling chamber, refrigerating pipes arranged above the air nozzles, a communicating duct which connects the combustion chamber with the cooling chamber, the communicating duct including a vertical or inclined lower end portion which is at least partially surrounded by or adjacent to a plurality of the refrigerating pipes in the cooling chamber, and wherein the lower end portion has a bottom outlet arranged at a lower level with respect to at least one of the refrigerating pipes.

Abstract: Plants for regenerating foundry sand are provided having a combustion chamber, which has at least one inlet for introducing sand to be regenerated into the combustion chamber, nozzles for feeding combustible gas into the combustion chamber, nozzles for injecting air so as to maintain a heated fluidized bed of sand in the combustion chamber, a cooling chamber for cooling sand coming from the combustion chamber, the cooling chamber having nozzles for blowing air in order to maintain a fluidized bed of sand in the cooling chamber, refrigerating pipes arranged above the air nozzles, a communicating duct which connects the combustion chamber with the cooling chamber, the communicating duct including a vertical or inclined lower end portion which is at least partially surrounded by or adjacent to a plurality of the refrigerating pipes in the cooling chamber, and wherein the lower end portion has a bottom outlet arranged at a lower level with respect to at least one of the refrigerating pipes.

Abstract: A method for cooling foundry castings, characterized in that it comprises the steps of: forming a cooling fog by nebulizing a flow of water, exposing a substantial part of the external surface of the casting to said cooling fog, measuring the temperature of the casting, and interrupting the exposure of the casting to the cooling fog when the measured temperature drops below the predetermined threshold.

Abstract: A method for producing sand cores for foundry, comprising the operations of: defining a molding cavity; blowing in a mixture of sand and hydrated binder into said molding cavity so as to produce a mass of sand, which reproduces in a complementary way the shape of said molding cavity; and producing the passage, through said mass of sand, of a flow of aeriform along at least one principal direction. The method comprises the operation of generating through said mass of sand a flow of aeriform, directed at least in part in a radial direction with respect to said principal direction.

Abstract: A method for producing sand cores for foundry, comprising the operations of: defining a moulding cavity; blowing in a mixture of sand and hydrated binder into said moulding cavity so as to produce a mass of sand, which reproduces in a complementary way the shape of said moulding cavity; and producing the passage, through said mass of sand, of a flow of aeriform along at least one principal direction. The method comprises the operation of generating through said mass of sand a flow of aeriform, directed at least in part in a radial direction with respect to said principal direction.

Abstract: Cooling and dust exhaustion plant for foundry sand, comprising:

Abstract: Bearing members project upwardly from a vibrating table with frusto-conical surfaces tapering upwardly to engage in corresponding frusto-conical sockets disposed in the bottom of a container of sand to be compacted. The frusto-conical sockets are formed of a material resistant to wear. The bearing members each comprise a body of wearable material which forms the frusto-conical surface. Each wearable body is fixed to the vibrating table by a respective releasable fastening element elongated in a vertical direction and having an upper head shaped to transmit and distribute a compression pre-load into the body.

Abstract: The plant for continuously regenerating foundry sand comprises a combustion chamber, in which a combustible gas is added to the sand, and a cooling chamber, in which the sand coming from the combustion chamber is cooled, both chambers being provided with systems for maintain the sand in a fluidized state. The chambers are also in direct communication with one another in the manner of communicating vessels in such a way that, during normal operation in equilibrium, the free surface of the sand may be at the same level in the two chambers.

Abstract: A system and a method are described for cooling a mold, particularly for expanded polystyrene, by means of jets of water in a depressurized environment. Pumps are used to depressurize the environment and to remove therefrom the steam generated by the jets of water. The pumps are arranged to perform the depressurization by suction directly from a steam-condenser connected to the environment of the mold and having means for cyclically discharging the water condensed in the condensation device.

Abstract: Bearing members project upwardly from a vibrating table with frusto-conical surfaces tapering upwardly to engage in corresponding frusto-conical sockets disposed in the bottom of a container of sand to be compacted. The frusto-conical sockets are formed of a material resistant to wear. The bearing members each comprise a body of wearable material which forms the frusto-conical surface. Each wearable body is fixed to the vibrating table by means of a respective releasable fastening element elongated in a vertical direction and having an upper head shaped to transmit and distribute a compression pre-load into the body.