SU138003A1 - Method for producing metal castings by squeezing metal - Google Patents

Description

Known methods of casting do not always provide high-quality thin-walled and large-size shaped castings of a volume type.

The proposed method for casting large-sized shaped castings of a volumetric type differs from the known ones in that the metal is poured into the lower part of the space formed by the inner surface of the spaced-apart shape parts and the surface of the casting rod fixedly mounted inside these shape parts. After the metal is poured, the mold parts mutually approach each other in the direction of the rod until a necessary gap is obtained between them and the rod. The displaced metal is pushed upward and, filling the space between the mold parts and the core, forms a casting with the required wall thickness and a given configuration of the outer and inner surfaces.

The drawing shows a scheme for producing volumetric castings according to the proposed method.

A portion of the molten metal through the filling hole 1 is poured into the metal reservoir 2. After the metal is poured, both half-molds 3 approach the required speed using a drive mechanism until they form between the sand core 4 and the shape of such a gap that corresponds to a given thickness of casting. In the process of approaching the semiforms, the metal is displaced from the metal reservoir into the cavity formed by the core and the semi-molds and, lifting up, forms a casting 5 with a predetermined configuration. In this case, the half-molds form the outer surface of the well, and the core - the inner one.

The described method can be obtained castings of the volumetric type (bodies, compartments, etc.) from aluminum, magnesium and other alloys with a diameter of up to 2 m, a height of 3 m and a wall thickness of 3 mm or less.

M 138003 The subject invention

The method of casting metal parts, characterized in that, in order to obtain shaped large-sized thin-walled castings of the volumetric type, the metal is poured into the lower part of the space formed by the inner surface of the spaced parts of the form (dies) with the surface of the casting rod fixed in these parts of the form, then mutually bring together the parts of the form to each other in the direction of the rod to obtain between them and the rod the necessary clearance; the displaced metal, lifting, will fill the space between the converging parts of the mold and the core, forms a casting with the required wall thickness and a given configuration of the outer and inner surfaces.

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