Low-pressure Mold for Improving Performance of Spokes of Aluminum Wheel

Abstract

A low-pressure mold for improving performance of spokes of an aluminum wheel. The mold is characterized in that cooling air holes in a bottom mold are moved for 10 mm in outwards; heat-insulation grooves are formed in positions, 5 mm from the cooling air holes, of a back cavity of the bottom mold, and are 8 mm from the surface of a cavity; and the width of each heat-insulation groove is set to 8 mm. A circumference arrangement range of the heat-insulation grooves needs to be larger than the widths of the spokes, and the number of the heat-insulation grooves is defined by the number of the spokes. Heat-preservation asbestos is arranged in each heat-insulation groove, thereby further strengthening heat-insulation and heat preservation functions. One air hole is added based on the prior art, thereby increasing the cooling area and improving the cooling intensity.

Claims

1. A low-pressure mold for improving performance of spokes of an aluminum wheel, comprising: a top mold, a bottom mold, cooling air holes, a side mold, heat-insulation grooves and heat-preservation asbestos; wherein the cooling air holes in the bottom mold are moved for 10 mm outwards; the heat-insulation grooves are formed in positions, 5 mm from the cooling air holes, of a back cavity of the bottom mold, and are 8 mm from the surface of a cavity; and the width of each heat-insulation groove is set to 8 mm.

2. The low-pressure mold for improving the performance of the spokes of the aluminum wheel according to claim 1, wherein the heat-preservation asbestos arranged in the heat-insulation grooves; and one air hole is added in each spoke, but the number of the air holes of each spoke is at most four.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0011] FIG. 1 is an assembly drawing of a mold in the prior art.

[0012] FIG. 2 is a top view of a bottom mold in the prior art.

[0013] FIG. 3 is an assembly drawing of a mold provided by the present invention.

[0014] FIG. 4 is a top-view of a bottom mold provided by the present invention.

[0015] In the figure, numeric symbols are as follows: 1—top mold, 2—bottom mold, 3—cooling air hole, 4—side mold, 5—heat-insulation groove, and 6—heat-preservation asbestos.

DETAILED DESCRIPTION OF THE INVENTION

[0016] the following further describes the present invention in combination with figures.

[0017] The FIG. 3 shows a low-pressure mold for improving performance of spokes of an aluminum wheel. The mold comprises a top mold 1, a bottom mold 2, cooling air holes 3, a side mold 4, heat-insulation grooves 5 and heat-preservation asbestos 6. The cooling air holes 3 in the bottom mold 2 are moved for 10 mm outwards, thereby reducing a cooling function to middle-part feeding channels of the spokes when strengthening the cooling, implementing sequence solidification from exterior to interior, and greatly strengthening the quick cooling of an outer rim and spoke root hot spots. The heat-insulation grooves 5 are formed in positions, 5 mm from the cooling air holes 3, of a back cavity of the bottom mold 2, and are 8 mm from the surface of a cavity. The width of each heat-insulation groove is set to 8 mm. In order to ensure the heat-insulation effect, a circumference arrangement range of the heat-insulation grooves 5 needs to be larger than the widths of the spokes, and the number of the heat-insulation grooves 5 is defined by the number of the spokes. The heat-preservation asbestos 6 is arranged in each heat-insulation groove 5, thereby further strengthening heat-insulation and heat preservation functions. One air hole is added based on the existing two cooling air holes 3, thereby increasing the cooling area and improving the cooling intensity. However, the number of the air holes in each spoke is at most four.

[0018] By combining with the improvement of the mold structure, the occurrence of casting defects of the spokes is effectively avoided when the cooling is strengthened, the performance of the spokes is improved, the casting cycle is shortened, and the production efficiency is improved.