Method and device for controlling cooling speed of core assembling casting

Abstract

The invention relates to a method for controlling the cooling speed of core assembling casting. A metal solution is poured into a sand mold; and the poured sand mold is put into water, so that a cast inside the sand mold can be cooled and solidified in water. A water-cooling device for controlling the cooling speed of the core assembling casting comprises a stander, a cooling water tank which is arranged on the stander and is used for storing water; and a lifting device is arranged above the cooling water tank and can drive the sand mold into the cooling water tank to be cooled. The cooling speed of different positions of the core assembling casting can be controlled by an external physical cooling measure, namely water cooling, and the device for water cooling, so that quick cooling and partial quick cooling can be realized, and internal quality of the cast is guaranteed; therefore, the core assembling casting process can be used for producing a batch of casts, such as an aluminum alloy cylinder cover in the automobile industry, which have high quality requirement, complicated shapes and partial hot joints.

Description

technical field [0001] The invention relates to a casting core assembly process, in particular to a method and device for controlling the cooling rate of core assembly casting. Background technique [0002] The core casting process has the advantages of accurate casting size, good surface quality, and easy recycling of single sand, and is being widely used. However, the disadvantages of core casting compared with metal mold casting or green sand are that the cooling rate of castings is slow and not easy to control, it is difficult to achieve sequential solidification or local rapid cooling, and it is difficult to ensure the inherent compactness of locally thick castings. In some cases, the ideal result cannot be achieved even with the more troublesome cold iron. This shortcoming makes the core casting process have certain limitations on castings with high quality requirements, complex shapes and local hot spots, such as aluminum alloy cylinder head castings in the automotiv...

AI Technical Summary

Problems solved by technology

However, the disadvantages of core casting compared with metal mold casting or green sand are that the cooling rate of castings is slow and not easy to control, it is difficult to achieve sequential solidification or local rapid cooling, and it is difficult to ensure the intrinsic compactness of locally thick castings

In some cases, the ideal result cannot be achieved even with the troublesome cold iron

This shortcoming makes the core casting process have certain limitations on castings with high quality requirements, complex shapes and local hot spots, such as aluminum alloy cylinder head castings in the automotive industry

[0003] At present, the core casting adopts the natural cooling method to realize the solidification of molten metal in the sand mold. Heat generation makes the cooling speed of castings slow, and it is not easy to control, it is difficult to achieve sequential solidification or local rapid cooling, and it is difficult to ensure the internal compactness of locally thick and large castings. result

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