Sand core ventilation cooling structure and manufacturing method thereof

Abstract

The invention relates to the technical field of sand cores, and discloses a sand core ventilation cooling structure. The sand core ventilation cooling structure comprises a bottom box casting mold, asand core body is placed in an inner cavity of the bottom box casting mold, a steel pipe body is fixedly sleeved with an inner cavity of the sand core body, a ventilation opening is formed in the outer side of the steel pipe body, a cover box casting mold is placed at the top of the bottom box casting mold, a liquid inlet is formed in the top of the cover box casting mold, and mounting grooves areformed in the two sides of the bottom of the bottom box casting mold. According to the sand core ventilation cooling structure and the manufacturing method thereof, an air inlet pipe, an exhaust pipe, the steel pipe body and the ventilation opening are arranged between the bottom box casting mold and the sand core body, the air inlet pipe is connected with a cold air pipeline of a workshop to form a ventilation cooling channel in the bottom of the sand core body, cold air is opened after a casting is poured, cold air enters the steel pipe body in the sand core body through the air inlet pipeand is exhausted out of a casting mold through the exhaust pipe after being heated, and the ventilation cooling effect of the bottom of the sand core body is achieved.

Description

technical field [0001] The invention relates to the technical field of sand cores, in particular to a sand core ventilation cooling structure and a manufacturing method thereof. Background technique [0002] In the production of castings, the sand core is inside the casting, and the heat dissipation conditions are not good. The position in contact with the sand core will cause the casting to solidify for a long time. Especially in the production of large castings, due to the large wall thickness of the casting itself, the cooling is slow and the solidification time is long. The location is more prone to loose defects. In order to improve the cooling conditions of the sand core, the sand core of large castings is cooled by cold air. The traditional method is: pre-embed steel pipes in the sand core, the steel pipe opening is on the top of the sand core, and the steel pipe protrudes from the top of the sand core; When assembling the core, insert the air inlet pipe from the top ...

AI Technical Summary

Problems solved by technology

[0002] In the production of castings, the sand core is inside the casting, and the heat dissipation conditions are not good. The position in contact with the sand core will cause the casting to solidify for a long time. Especially in the production of large castings, due to the large wall thickness of the casting itself, the cooling is slow and the solidification time is long. The location is more prone to loose defects. In order to improve the cooling conditions of the sand core, the sand core of large castings is cooled by cold air. The traditional method is: pre-embed steel pipes in the sand core, the steel pipe opening is on the top of the sand core, and the steel pipe protrudes from the top of the sand core; When assembling the core, insert the air inlet pipe from the top of the sand core and connect the cold air. After the casting is poured, turn on the cold air. The cold air enters the steel pipe from the top of the sand core. Conventional sand cores with upper core heads can achieve sand core ventilation and cooling by using traditional methods, but for sand cores without upper core heads, traditional methods cannot be used, and sand core ventilation and cooling effects cannot be achieved

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