Low-pressure casting mold for aluminum alloy wheel hub and pouring method of low-pressure casting mold

Abstract

The invention relates to a low-pressure casting mold for an aluminum alloy wheel hub, which comprises an upper mold, an upper mold core, a left side mold, a right side mold and a lower mold, wherein the upper mold core is arranged on the upper mold; the upper mold, the upper mold core, the left side mold, the right side mold and the lower mold are assembled to form a casting cavity for casting the wheel hub; the casting cavity comprises a rim cavity and a spoke cavity of the wheel hub; a spreader is arranged on the lower mold; a sprue is formed on each of the left side mold and the right side mold and directly communicated with the rim cavity; a sprue cup is arranged on a lower mold board; the upper end of the sprue cup is communicated with the sprues; and the lower end of the sprue cup is communicated with a riser tube inserted into a holding furnace. The invention further relates to a pouring method with the adoption of the mold. As the sprues are formed on the side molds and directly communicated with the rim cavity, when a spoke is thin, the solidification time of the spoke is shortened, a metallurgical structure becomes more dense as the solidification time of aluminum liquid is shortened, and further the mechanical property can be improved; and the mechanical property of the wheel hub is improved obviously while the wheel hub is lighter.

Description

technical field [0001] The invention relates to the technical field of mechanical casting, in particular to a low-pressure casting mold for an aluminum alloy wheel hub and a pouring method thereof. Background technique [0002] The gate of the existing aluminum alloy wheel casting mold is located at the splitter cone position of the lower die, see figure 1 , the gate is set at the position of the splitter cone 8, and the size and shape of the gate used for each size of the hub are uniquely determined; the method of casting the hub using this mold is the center casting method, and the cooling method of this casting is according to the rim Parts, spoke parts, and mounting surface parts are directional solidified, and because the spoke part is an important supply channel for aluminum water to the rim part, in order to ensure a good flow of aluminum water, the spoke part can only be thickened. The existing hub spoke The thickness of the wheel hub is generally 15-20mm, especiall...

AI Technical Summary

Problems solved by technology

[0002] The gate of the existing aluminum alloy wheel casting mold is located at the splitter cone position of the lower die, see figure 1 , the gate is set at the position of the splitter cone 8, and the size and shape of the gate used for each size of the hub are uniquely determined; the method of casting the hub using this mold is the center casting method, and the cooling method of this casting is according to the rim Parts, spoke parts, and mounting surface parts are directional solidified, and because the spoke part is an important supply channel for aluminum water to the rim part, in order to ensure a good flow of aluminum water, the spoke part can only be thickened. The existing hub spoke The thickness of the wheel hub is generally 15-20mm, especially the existing 17-inch wheel hub, which increases the weight of the wheel hub virtually. The speed will slow down, and the sensitivity of the steering wheel will also decrease, so it is necessary to adopt lighter aluminum alloy wheels. As the recent automotive industry has increasingly stringent requirements for lightweight aluminum alloy wheels, it is no longer possible to adopt the existing center casting method. To meet customer requirements

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