Mold for improving solidification speed of aluminum alloy cast hot section

A mold for improving a solidification speed of an aluminum alloy cast hot section, the mold comprising a top mold, a side mold and a bottom mold, the top mold being arranged at a 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 a side of the top mold and the bottom mold, and the top mold, the side mold and the bottom mold jointly surrounding a cast cavity of the wheel, wherein a center of the top mold comprises a step hole, a shunt cone is mounted through the step hole, and the shunt cone is connected with the top mold by bolts;

• an upper part of the shunt cone is assembled with a center hole of the top mold of the mold, and the upper part of the shunt cone and the center hole of the top mold of the mold are in zero clearance fit;
• an axial assembly height of the upper part of the shunt cone and the center hole of the top mold of the mold is 8-12 mm;
• a lower end of the shunt cone comprises a disk-shaped cooling portion, an annular water channel is provided in the disk-shaped cooling portion, an outer diameter of the disk-shaped cooling portion is identical to an outer ring of a top mold flange, and the annular water channel is coaxial with the top mold of the mold;
• a cross section of the annular water channel is U-shaped, a root of the annular water channel is 6-8 mm from a lower end surface of the shunt cone, the root of the annular water channel is rounded, and an arc diameter is 1.5-2.5 mm;
• a roughness of a bottom surface of the shunt cone is less than 1.6;
• the annular water channel of the shunt cone is concentrically distributed in two rings, an inner ring of the two rings corresponds to a flange weight reduction socket of the wheel, and an outer ring of the two rings is arranged at a joint of a spoke and a flange of the wheel;
• a side wall of the disk-shaped cooling portion comprises diversion holes, and the diversion holes connect the inner ring and the outer ring;
• an annular cover plate covers the annular water channel of the shunt cone, and water inlet pipes and a water outlet pipe are arranged on openings of the annular cover plate;
• a top of the upper part of the shunt cone comprises a connecting portion, and the connecting portion is connected to a branch pipe;
• a center of the shunt cone comprises a deep water hole extending all the way to a lower cone head of the shunt cone.