Steel pipe pouring mold and method

Abstract

The invention discloses a steel pipe pouring mold and method. The steel pipe pouring mold comprises a base, a cylindrical outer mold, a pouring piece and a core mold, and a connecting hole is formed in the center of the base. The cylindrical outer mold can be arranged above the base. The pouring piece comprises a pouring pipe with a through cavity, the pouring pipe can be placed in the connectinghole and then connected with the base, and a pouring hole in the pouring pipe is located above the base. The core mold is connected with the top of the pouring pipe and is prepared from magnesia. After the cylindrical outer mold and the core mold are arranged above the base, the base, the core mold and the cylindrical outer mold form a cavity. According to the steel pipe pouring mold and method, the core mold is prepared from the magnesia, so that the core mold automatically falls off in the molten steel solidification process, the demolding difficulty of the core mold from a steel pipe is reduced, and the problems of inconsistent external surface thermal stress and internal density of the steel pipe caused by non-uniform temperature of molten steel due to cooling and demolding of the coremold in the prior art are avoided.

Description

technical field [0001] The invention relates to the technical field of steel pipe pouring, in particular to a steel pipe pouring mold and a pouring method. Background technique [0002] After the hollow steel pipe is poured, the steel pipe is closely attached to the mold, which makes demoulding difficult. In order to overcome the above problems, the mold is generally designed to have different sizes at the upper and lower ends. In this way, the demoulding of the steel pipe is relatively easy, but the shape and size of the hollow steel pipe cast from this will also be affected by the shape of the mold, and the upper and lower ends have different sizes. and other shapes, resulting in a reduction in the available volume of the hollow steel pipe. At the same time, in the prior art, the demoulding of the core mold of the steel pipe is realized by cooling the core mold, and this method will cause the center part of the molten steel to dissipate heat faster than the edge part, whi...

AI Technical Summary

Problems solved by technology

[0002] After the hollow steel pipe is poured, the steel pipe is closely attached to the mold, which makes demoulding difficult

In order to overcome the above problems, the mold is generally designed to have different sizes at the upper and lower ends. In this way, the demoulding of the steel pipe is relatively easy, but the shape and size of the hollow steel pipe cast from this will also be affected by the shape of the mold, and the upper and lower ends have different sizes. and other shapes, resulting in a reduction in the available volume of the hollow steel pipe

At the same time, in the prior art, the demoulding of the core mold of the steel pipe is realized by cooling the core mold, and this method will cause the center part of the molten steel to dissipate heat faster than the edge part, which will lead to the cooling and solidification process of the molten steel Inconsistency in the medium temperature will eventually lead to the problem of inconsistent thermal stress on the outer surface of the steel pipe and inconsistent internal density

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