A method for managing a casting process based on measured properties of molding sand is provided so that casting defects or energy used can be reduced by changing the molding conditions for the mold to be produced or changing the steps after molding. The method for managing a casting process based on the properties of the molding sand includes a step (1) of measuring the properties of the molding sand just before the molding sand is supplied to a molding machine (40) and a step (2) of determining if the measured properties of the molding sand comply with predetermined properties so as to then switch between a step of molding a mold when the measured properties do comply with the predetermined properties and a step of molding a mold when the measured properties do not comply with the predetermined properties.

Providing a method of modifying refractory particles used to produce a casting mold by using a furan resin as a binder, so as to effectively improve a strength of the casting mold and to reduce a required amount of the binder. An artificial aggregate which is artificially produced and which has an apparent porosity of not more than 5% is used as the refractory particles, and the artificial aggregate is subjected to a heat treatment at a temperature of 400-1500 C. for not shorter than one hour in a heating atmosphere having an oxygen concentration of not higher than 15%.

Providing a method of modifying refractory particles used to produce a casting mold by using a furan resin as a binder, so as to effectively improve a strength of the casting mold and to reduce a required amount of the binder. An artificial aggregate which is artificially produced and which has an apparent porosity of not more than 5% is used as the refractory particles, and the artificial aggregate is subjected to a heat treatment at a temperature of 400-1500 C. for not shorter than one hour in a heating atmosphere having an oxygen concentration of not higher than 15%.

A method for manufacturing a structure from a granular material, called sand, in particular a mold. A layer of sand is deposited. The layer of sand is selectively agglomerated by spraying, using a spray nozzle, an inorganic binder having an M2SiO3 type (meta)silicate dissolved in a solvent. Prior to the spraying, the inorganic binder is heated to a temperature to confer on it a viscosity less than 0.2 Pa.Math.s. A device for implementing the method is provided.

A method for manufacturing a structure from a granular material, called sand, in particular a mold. A layer of sand is deposited. The layer of sand is selectively agglomerated by spraying, using a spray nozzle, an inorganic binder having an M2SiO3 type (meta)silicate dissolved in a solvent. Prior to the spraying, the inorganic binder is heated to a temperature to confer on it a viscosity less than 0.2 Pa.Math.s. A device for implementing the method is provided.

A nozzle assembly for generating cavitation includes an inlet nozzle having a first end and an opposing second end. The inlet nozzle further includes an inlet bore extending from the first end to the second end, the inlet bore defining a first cross-sectional area at the first end and a second cross-sectional area at the second end. The second cross-sectional area is less than the first cross-sectional area, such that the inlet bore is configured to decrease pressure in a fluid from the first end to the second end, thereby forming vapor pockets in the fluid. The nozzle assembly further includes an outlet nozzle having a first end and an opposing second end. An outlet bore extends from the first end to the second end, the outlet bore configured to receive fluid from the inlet bore.

A nozzle assembly for generating cavitation includes an inlet nozzle having a first end and an opposing second end. The inlet nozzle further includes an inlet bore extending from the first end to the second end, the inlet bore defining a first cross-sectional area at the first end and a second cross-sectional area at the second end. The second cross-sectional area is less than the first cross-sectional area, such that the inlet bore is configured to decrease pressure in a fluid from the first end to the second end, thereby forming vapor pockets in the fluid. The nozzle assembly further includes an outlet nozzle having a first end and an opposing second end. An outlet bore extends from the first end to the second end, the outlet bore configured to receive fluid from the inlet bore.

A rotary kiln-type core sand regeneration system, having a rotating cylinder, a burner for directing a flame into the rotating cylinder, a motor for rotating the rotating cylinder, front and rear boundary frames and rollers for supporting the rotating cylinder, and a platform on which the rotating cylinder, the burner, the motor, the front and rear boundary frames and the rollers are mounted. The rotating cylinder has a used core sand inlet, an exhaust cylinder and a preliminary heating cylinder arranged from the rear and a regenerated core sand outlet formed at a front part thereof, the rotating cylinder being directly coupled to the burner at a front end, and including at least one combustion cylinder having passing holes through which the core sand and the flame from the burner are passed in a front part thereof.

A rotary kiln-type core sand regeneration system, having a rotating cylinder, a burner for directing a flame into the rotating cylinder, a motor for rotating the rotating cylinder, front and rear boundary frames and rollers for supporting the rotating cylinder, and a platform on which the rotating cylinder, the burner, the motor, the front and rear boundary frames and the rollers are mounted. The rotating cylinder has a used core sand inlet, an exhaust cylinder and a preliminary heating cylinder arranged from the rear and a regenerated core sand outlet formed at a front part thereof, the rotating cylinder being directly coupled to the burner at a front end, and including at least one combustion cylinder having passing holes through which the core sand and the flame from the burner are passed in a front part thereof.

To provide an apparatus for reclaiming foundry sand that has a fluidized bed that prevents slits from being clogged. The apparatus comprises a tank (3) for reclaiming the foundry sand, a tank (4) for fluidization, an upper portion of which in an upstream side is connected to a bottom of the tank for reclaiming the foundry sand, the tank for fluidization transporting the reclaimed foundry sand and fine powder that drop from the tank for reclaiming the foundry sand, a dust hood (5), and a lower portion of which communicates with an upper portion of the tank for fluidization in a downstream side, the dust hood collecting the fine powder in the tank for fluidization, wherein a fluidized bed (6) in the tank for fluidization has a plurality of inverted V-shaped covering members (13) and a plurality of V-shaped flooring members (14), wherein the inverted V-shaped covering members and the V-shaped flooring members are horizontally and alternately provided so that the inverted V-shaped covering members are at any point above a vertically corresponding point of the V-shaped flooring members, and wherein gaps between end portions of the inverted V-shaped covering members and end portions of the V-shaped flooring members are formed as inclined slits (15) for supplying air.