Casting device and casting method thereof

Abstract

The invention provides a casting device and a casting method thereof. The casting device comprises a centrifugal lower mold, a centrifugal upper mold, a sand mold, a mold jacking device and a centrifugal machine, wherein an accommodating cavity is formed in the centrifugal lower mold; a guide bar is arranged at the position, on the outer side of the accommodating cavity, of the centrifugal lower mold; a cavity for accommodating the sand mold is formed in the centrifugal upper mold; a feeding pouring gate is formed in the bottom surface of the sand mold; a sprue is formed in the top surface ofthe feeding pouring gate; at least two annular casting cavities are formed in the periphery of the feeding pouring gate; each casting cavity sinks inwards from the bottom surface of the sand mold; each casting cavity is provided with a connecting channel communicating to the feeding pouring gate; the mold jacking device comprises a stripping plate arranged in the accommodating cavity, a jacking shaft connected under the stripping plate, a mold jacking plate arranged below the centrifugal lower mold and driving equipment arranged below the mold jacking plate. Two ends of the guide bar are separately fixed to the centrifugal upper mold and the mold jacking plate. The casting method comprises the following steps: stretching the mold jacking device out; retracting the mold jacking device; carrying out centrifugal casting; jacking the mold; pushing out a forming body; and removing the centrifugal pressure casting pouring gate. A casting manufactured by the casting device is uniform in tissue, and defects such as airholes are reduced.

Description

technical field [0001] The invention relates to a molding technology, in particular to a casting device and a casting method thereof. Background technique [0002] Casting is a method of pouring liquid metal into a casting cavity adapted to the shape of the part, and then cooling and solidifying it to obtain a part or blank. Existing casting methods are usually divided into gravity casting and centrifugal casting. Gravity casting refers to the process of injecting molten metal into the mold under the action of gravity. The molten metal flows through the sprue, runner and inner runner, and the molten metal The flow path is long, the mold filling is slow, and it is easy to produce casting defects such as pores, sand holes and slag inclusions. Existing centrifugal casting refers to injecting liquid metal into the high-speed rotating mold, so that the molten metal is filled with the mold under the action of centrifugal force, and the large centrifugal force generated by high-sp...

AI Technical Summary

Problems solved by technology

[0003] The invention proposes a casting device and its casting method, which solves the problems of long gravity casting flow path and poor roughness of centrifugal casting inner hole in the prior art.

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