# US 10,245,635 B2 · Low-pressure mold for improving performance of spokes of aluminum wheel

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- Number: US 10,245,635 B2
- Document ID: US10245635B2
- Status: Granted
- Kind: B2
- Application number: 15/640,708
- Filed: 2017-07-03
- Published: 2018-01-04
- Granted: 2019-04-02
- Earliest claimed: 2016-07-03
- Assignees: CITIC Dicastal Co., Ltd.
- Applicants: CITIC Dicastal CO., LTD
- Inventors: Guohua Liu; Xu Wang; Xueqiang Li; Dong Xing; Junmeng Li; Changhai Li; Zhihua Zhu; Yongning Wang
- Web page: https://patentgrep.com/patent/US10245635B2

## CPC

- B22C 9/065: {Cooling or heating equipment for moulds}
- B22C 9/28: for wheels, rolls, or rollers {(B22D15/005 takes precedence)}
- B22D 18/04: Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
- B22C: FOUNDRY MOULDING (moulding refractory materials in general B28B)
- B22D: CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES (shaping of plastics or substances in a plastic state B29C; metallurgical processing, selection of substances to be added to metal C21, C22)

## 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 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

### Claim 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 arranged along a circumference of the bottom mold;
the heat-insulation grooves are formed in positions, 5 mm inwards along a radial direction of the bottom mold 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 along the radial direction, and the circumferential width of each heat-insulation groove is larger than the circumferential width of the corresponding spoke along the circumference.

### Claim 2 (depends on 1)

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
the number of the air holes is more than two for each spoke, but the number of the air holes for each spoke is at most four.