Recovered-sand cooling system and recovered-sand cooling method

Abstract

The invention provides a recovered-sand cooling system and a recovered-sand cooling method whereby recovered sand can be reliably cooled. Provided is a recovered-sand cooling system 1 for cooling recovered sand and adjusting the moisture content of the cooled recovered sand, wherein the recovered-sand cooling system 1 is provided with a sand moisture temperature measuring instrument 2 for measuring the moisture content and the temperature of the recovered sand, a control device for determining an appropriate moisture addition amount which is an amount of water to add to the recovered sand, water-sprinkling cooling devices 4, 5 for adding the appropriate moisture addition amount of water to the recovered and cooling the recovered sand by the latent heat of vaporization of the water to obtain cooled recovered sand, an air introduction device 6 for introducing air to the water-sprinkling cooling devices 4, 5, and an introduced-air temperature / humidity measuring instrument 7 for measuringthe temperature and humidity of introduced air introduced to the water-sprinkling cooling devices 4, 5, the control device 3 determining the appropriate moisture addition amount on the basis of the moisture content and temperature of the recovered sand and on the temperature and humidity of the introduced air.

Description

technical field [0001] The invention relates to a recycled sand cooling system and a recycled sand cooling method suitable for wet casting molds. Background technique [0002] As is well known, a casting method using green sand as a mold, ie, green casting, is widely used. In green casting, the molten metal being cast is shaken out after it has solidified in the mold, and the sand used as the mold is separated from the casting. The separated sand is recovered as recycled sand, and after foreign matter removal and sand cooling, it is mixed and conditioned to be reused in molding in the wet type. [0003] The sand temperature and water content of recycled sand will affect the subsequent mixing process and molding process. In particular, when the green sand is sent to the mixing process and molding process in the state where the sand temperature of the recovered sand is high, moisture will condense on the inner wall of the green sand storage hopper installed in front of the m...

AI Technical Summary

Problems solved by technology

In addition, the drying of the sand after mixing becomes faster, so the bonding force between the sands becomes smaller, which may also cause poor molding such as blanking and sand inclusions in the casting mold.

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