Aluminum alloy wheel gravity casting die and casting method thereof

Abstract

The invention discloses an aluminum alloy wheel gravity casting die and a casting method thereof. The aluminum alloy wheel gravity casting die comprises a cooling device, a top die, a side die, a bottom die and a die cavity formed by the top die, the side die and the bottom die; the bottom die is provided with a sprue spreader; the aluminum alloy wheel gravity casting die also comprises a heat insulation cup communicated with the die cavity and capable of storing molten aluminum, a pressing device capable of enabling the molten aluminum stored in the heat insulation cup to be continuously injected into the die cavity, and a plugging device capable of stopping the molten aluminum stored in the heat insulation cup from flowing into the die cavity under the action of gravity; the heat insulation cup is arranged on a rack of a gravity casting machine, and the plugging device is arranged on the bottom die or the rack of the gravity casting machine; and the casting method for the aluminum alloy wheel gravity casting die comprises molten aluminum injection, pressing, continuous casting, filling, feeding, crystallization and solidification. The cast aluminum alloy wheel has the advantages of a few dead heads, high weight and yield, and good quality stability.

Description

Technical field: [0001] The invention belongs to the technical field of aluminum alloy wheel manufacturing, in particular to a gravity casting mold for aluminum alloy wheels and a casting method thereof. Background technique: [0002] At present, the methods for manufacturing aluminum alloy wheels at home and abroad include forging, squeeze casting, low pressure casting and gravity casting, etc., and low pressure casting and gravity casting are casting methods commonly used in China. [0003] Among them, gravity casting refers to the process of injecting molten aluminum into the cavity under the action of the earth's gravity. According to the position of the molten aluminum gate, it is divided into center casting, side mold casting and bilateral mold casting. The wheel blanks formed by center casting have center casting risers and upper rim risers; the wheel blanks formed by side mold casting have side casting risers, center risers and upper rim risers; wheel blanks formed by bilat...

AI Technical Summary

Problems solved by technology

The aluminum alloy wheels formed by these three casting methods have too many risers, and the follow-up processing allowance is large, resulting in low weight yield of the product

In addition, these three pouring methods are all manually pouring aluminum liquid from the gate into the cavity one after another. There are many artificial factors in the filling process, and the quality stability of the formed aluminum alloy wheel is not good. For example, manual pouring If the rhythm and filling speed are not in place, the air leakage rate of aluminum alloy wheels will increase

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