Casting device and casting method thereof

Abstract

A casting device, comprising a centrifugal lower die (10), a centrifugal upper die (20), a sand mold (30), a die ejection device (50), and a centrifuge; the centrifugal lower die forms an accommodating chamber (12), and a guide rod (60) is penetratingly provided at an outer side of the accommodating chamber in the centrifugal lower die; a mold cavity (21) that accommodates the sand mold is provided on the centrifugal upper die, a feeding pouring channel (31) being formed at a bottom surface of the sand mold, while a top surface of the feeding pouring channel is provided a sprue (36); an at least two-ring casting chamber (32) is provided at the periphery of the feeding pouring channel, each casting chamber being inwardly recessed from a bottom surface of the sand mold, and each casting chamber being provided with a connecting path (35) that is in communication with the feeding pouring channel; the die ejection device comprises a die lifting plate (51) that is provided within the accommodating chamber and an ejection shaft (52) that is connected below the die lifting plate; a die ejection plate (50) is provided below the centrifugal lower die and drive equipment is provided below the die ejection plate; two ends of the guide rod are fixed on the centrifugal upper die and the die ejection plate, respectively. A casting method, comprising the following steps: top die device extension, top die device retraction, centrifugal pouring, die ejection, molded body ejection, and feeding sprue removal. Casting pieces manufactured by using the casting device of the casting method are even in structure, reducing defects such as blisters.

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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