A mold for reducing defects in low pressure casting of an aluminum alloy wheel includes a top mold, a side mold and a bottom mold, wherein the top mold is arranged above the bottom mold to mold a back cavity of a wheel, the bottom mold is arranged below the top mold to mold a front wheel disc of the wheel, the side mold is arranged on the side of the top mold and the bottom mold, and the top mold, the side mold and the bottom mold collectively surround a casting cavity of the aluminum alloy wheel, wherein the upper surface of the bottom mold includes a recessed portion configured to form a spoke and a boss portion configured to form a window and wherein the boss portion configured to form the window includes cooling ducts.

A mold for reducing defects in low pressure casting of an aluminum alloy wheel includes a top mold, a side mold and a bottom mold, wherein the top mold is arranged above the bottom mold to mold a back cavity of a wheel, the bottom mold is arranged below the top mold to mold a front wheel disc of the wheel, the side mold is arranged on the side of the top mold and the bottom mold, and the top mold, the side mold and the bottom mold collectively surround a casting cavity of the aluminum alloy wheel, wherein the upper surface of the bottom mold includes a recessed portion configured to form a spoke and a boss portion configured to form a window and wherein the boss portion configured to form the window includes cooling ducts.

A plunger for strengthening spoke root R angle cooling. A plunger main body is step-shaped and provided with a blind hole, and vent holes are uniformly distributed around the blind hole; an annular groove is formed in the plunger main body, and connects the blind hole with the vent holes; air outlet pipes are inserted into the blind hole, the distance between the air outlet pipes and the bottom of the blind hole is 1-1.5 times the radius of the blind hole, an annular air pipe connects the air inlet pipe with the air outlet pipes and distributes cooling air entering from an air inlet pipe to each air outlet pipe, and the diameter of the air inlet pipe is not smaller than two times that of the air outlet pipe.

A plunger for strengthening spoke root R angle cooling. A plunger main body is step-shaped and provided with a blind hole, and vent holes are uniformly distributed around the blind hole; an annular groove is formed in the plunger main body, and connects the blind hole with the vent holes; air outlet pipes are inserted into the blind hole, the distance between the air outlet pipes and the bottom of the blind hole is 1-1.5 times the radius of the blind hole, an annular air pipe connects the air inlet pipe with the air outlet pipes and distributes cooling air entering from an air inlet pipe to each air outlet pipe, and the diameter of the air inlet pipe is not smaller than two times that of the air outlet pipe.

Disclosed in the present application is a low-pressure casting mold for an aluminum wheel. V-shaped grooves are formed in the cavity surface of a side mold, a cavity is formed in the back cavity of the side mold, a cooling duct is arranged in the cavity of the side mold, and a main air pipe is perpendicular to an annular branch; the annular branch is concentric with a wheel casting, and air pipes are 5-10 mm away from the bottom surface of the cavity; the two ends of the annular branch are welded with plugs; air outlet holes are arranged on the annular branch, and the holes are perpendicular to the bottom surface of the cavity; the diameters of the air outlet holes are 3 mm, and the holes are uniformly distributed at intervals of 10-15 mm in the circumferential direction.

Disclosed in the present application is a low-pressure casting mold for an aluminum wheel. V-shaped grooves are formed in the cavity surface of a side mold, a cavity is formed in the back cavity of the side mold, a cooling duct is arranged in the cavity of the side mold, and a main air pipe is perpendicular to an annular branch; the annular branch is concentric with a wheel casting, and air pipes are 5-10 mm away from the bottom surface of the cavity; the two ends of the annular branch are welded with plugs; air outlet holes are arranged on the annular branch, and the holes are perpendicular to the bottom surface of the cavity; the diameters of the air outlet holes are 3 mm, and the holes are uniformly distributed at intervals of 10-15 mm in the circumferential direction.

A mold for improving solidification speed of an aluminum alloy cast hot section includes a top mold, a side mold and a lower mold, the top mold being arranged at top and configured to complete a back cavity of a wheel, the bottom mold being arranged below the top mold and configured to complete shaping of a front wheel disc of the wheel, the side mold being arranged on side of the top mold and bottom mold, the top mold, side mold and bottom mold jointly surrounding a cast cavity of the aluminum alloy wheel, the center of the top mold includes a step hole through which a shunt cone is mounted, the shunt cone is connected with the top mold by bolts; the upper part of the shunt cone is assembled with the center hole of the top mold of the mold, the two are in zero clearance fit.

A mold for improving solidification speed of an aluminum alloy cast hot section includes a top mold, a side mold and a lower mold, the top mold being arranged at top and configured to complete a back cavity of a wheel, the bottom mold being arranged below the top mold and configured to complete shaping of a front wheel disc of the wheel, the side mold being arranged on side of the top mold and bottom mold, the top mold, side mold and bottom mold jointly surrounding a cast cavity of the aluminum alloy wheel, the center of the top mold includes a step hole through which a shunt cone is mounted, the shunt cone is connected with the top mold by bolts; the upper part of the shunt cone is assembled with the center hole of the top mold of the mold, the two are in zero clearance fit.

A water-cooled mold for low-pressure casting of an aluminum alloy wheel includes an upper mold, a lower mold and a side mold which surround a cavity of aluminum alloy, in which a cooling insert is embedded into a side mold frame of the side mold; an upper parting surface, a lower parting surface and a side parting surface of the cooling insert are respectively in contact parting with the side mold frame, the side parting surface includes a front zone and a rear straight zone, and a gap of 1.5-2.5 mm is formed between the rear straight zone and the side mold frame.

A water-cooled mold for low-pressure casting of an aluminum alloy wheel includes an upper mold, a lower mold and a side mold which surround a cavity of aluminum alloy, in which a cooling insert is embedded into a side mold frame of the side mold; an upper parting surface, a lower parting surface and a side parting surface of the cooling insert are respectively in contact parting with the side mold frame, the side parting surface includes a front zone and a rear straight zone, and a gap of 1.5-2.5 mm is formed between the rear straight zone and the side mold frame.