Sand lined metal mold casting method for manufacturing sand core for middle and rear axle castings for automobile

Abstract

The invention discloses a sand lined metal mold casting method for manufacturing a sand core for middle and rear axle castings for an automobile. The method is characterized by comprising the following steps of: dividing a middle and rear axle sand core into three sections, namely a left sand core, a middle sand core and a right sand core, and manufacturing the sand cores in a hollow mode respectively; and assembling the three sections of sand cores, forming a through hole in the middles of the three sections of sand cores, arranging a steel pipe of which the diameter is matched with that of the through hole in the through hole, forming a plurality of air vents on the steel pipe, and assembling the steel pipe and the three sections of sand cores to form a whole sand core. Therefore, in the process of pouring the castings, gases generated in the sand core can be discharged into the steel pipe through the air vents, are introduced to a sand core head through the steel pipe, pass througha gap between the sand core head and a casting mold and are smoothly discharged out of the casting mold. The method can be used for producing middle and rear axle castings through sand lined metal mold casting and also can be used for common sand casting production and resin sand casting production.

Description

Technical field [0001] The invention relates to a manufacturing method of a core used for manufacturing automobile middle and rear axle castings with metal mold sand coating. Background technique [0002] Automobile middle and rear axle castings are one of the largest castings in automobile axle systems. Automobile middle and rear axle castings are hollow castings, which need to be placed in the mold to form the inner cavity of the casting during casting production. The traditional production process of vehicle middle and rear axle castings mainly uses green sand machine modeling, and now it is also produced by chilled resin sand casting. The latest production method of automobile middle and rear axle castings is to use metal mold sand-coated casting technology. [0003] For the use of metal sand-coated castings for automobile middle and rear axle castings, due to the particularity of the metal sand-coated casting process, the requirements for the production of middle and rear ax...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a kind of metal-type sand-coated manufacturing automobile middle bridge, which can solve the traditional chilled resin sand core and oil sand core casting rear axle castings, which are prone to pore defects. A Manufacturing Method of Ning Core for Rear Axle Castings

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