Reducer shell sand core structure and pouring system

Abstract

The invention relates to a reducer shell sand core structure and a pouring system. The reducer shell sand core structure comprises a base sand core, a bottom sand core, a riser sand core, a middle sand core, an upper sand core, a flange sand core, an annular runner and a cross runner, wherein the bottom sand core is arranged on the base sand core; the riser sand core is arranged on the bottom sandcore; the middle sand core fits the outer side of the riser sand core; the upper sand core and the middle sand core are oppositely arranged; the flange sand core is arranged on the upper sand core; acasting cavity is formed among the base sand core, the bottom sand core, the riser sand core, the middle sand core, the upper sand core and the flange sand core; the annular runner is arranged on theflange sand core; the cross runner is arranged on one side of the annular runner and communicates with the annular runner; and the annular runner and the casting cavity communicate with each other through rain spraying type inner sprues. According to the reducer shell sand core structure and the pouring system, sand holes or slag holes in the straight wall of the casting can be eliminated, the rejection rate of the casting is decreased, and product quality of the casting is improved.

Description

technical field [0001] The invention relates to the technical field of casting of auto parts, in particular to a sand core structure and a pouring system for a reducer shell. Background technique [0002] The planetary reducer housing is one of the important spare parts of the automobile, and the raw material usually used to manufacture the planetary reducer housing is QT450-10. In the casting process of the planetary reducer housing, in order to ensure the internal quality, the traditional casting process generally adopts the flange upward method, and the molten iron is fed from the flange position. However, the main defect of this traditional casting process is that there are many sand holes or slag holes on the straight wall of the casting, and the serious problem of penetrating sand holes or slag holes will appear, which will cause the casting to be scrapped and reduce the production of the casting. Rate. Contents of the invention [0003] Based on this, the purpose ...

AI Technical Summary

Problems solved by technology

However, the main defect of this traditional casting process is that there are many sand holes or slag holes on the straight wall of the casting, and the serious problem of penetrating sand holes or slag holes will appear, which will cause the casting to be scrapped and reduce the production of the casting. Rate

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