Aluminum flywheel shell low-pressure metal mold

Abstract

An aluminum flywheel shell low-pressure metal mold comprises an outer mold, a sand core installed in the outer mold and a pouring system. The outer mold comprises a bottom mold, a side mold used for forming the shape of the outer wall of an aluminum flywheel shell, and an upper mold. The pouring system comprises a straight spure, a transverse spure and an annular inner spure communicated with a cavity of a casting. The transverse spure comprises a lower transverse spure body and an upper transverse spure body. The lower transverse spure body is arranged at the bottom of the sand core. The straight spure, the upper transverse spure body and the annular inner spure are arranged on the bottom mold. A filter screen is arranged in the straight spure which is communicated with the annular inner spure through the transverse spure to form a molten aluminum pouring channel. An exhaust rod is arranged on the upper mold and used for guaranteeing smooth exhausting of the sand core. The upper mold is further provided with an insert matched with the upper mold. The aluminum flywheel shell low-pressure metal mold is good in slag avoiding effect, the phenomenon that molten aluminum is used up can not happen, product quality can be better guaranteed, the product percent of pass is increased, no risers need to be arranged for feeding the casting, and the technological yield is increased.

Description

technical field [0001] The invention relates to a low-pressure metal mold. Background technique [0002] As one of the key parts of the automobile engine, the flywheel housing is installed between the engine and the gearbox, externally connected to the crankcase, starter, oil pan, and built in the flywheel assembly, which plays the role of connecting the body, protection and carrier. The aluminum flywheel housing is complex in shape and large in size, and is a large aluminum alloy thin-walled part. At present, most of the aluminum flywheel shells adopt the gravity casting process of introducing lap gates from the front face. This process needs to set up more and larger risers to feed the scattered hot spots, which results in low process yield and risk of subsequent processes. The removal of the mouth is heavy and difficult, and there are many subcutaneous pores on the product surface. Contents of the invention [0003] The object of the present invention is to provide an...

AI Technical Summary

Problems solved by technology

At present, most of the aluminum flywheel shells adopt the gravity casting process of introducing lap gates from the front face. This process needs to set up more and larger risers to feed the scattered hot spots, which results in low process yield and risk of subsequent processes. The removal of the mouth is heavy and difficult, and there are many subcutaneous pores on the surface of the product

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