Split type top die structure

By adopting a split top mold structure and negative pressure cavity design in the aluminum alloy wheel hub casting mold, the problems of defects such as air holes, insufficient pouring and flow marks in the existing molds are solved, and higher casting quality and lower production costs are achieved.

CN222643185UActive Publication Date: 2025-03-21QINHUANGDAO ZHONGQIN BOHAI HUB CO LTD
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Patent Information

Application Number
CN202420829142.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-22
Publication Date
2025-03-21
Estimated Expiration
2034-04-22

AI Technical Summary

Technical Problem

In the existing aluminum alloy wheel casting molds, the top mold is usually an integrated structure, which leads to easily cause defects such as pores, insufficient pouring, flow marks, etc., which affects the casting quality and is inconvenient to set up a cooling structure, and is highly designed and manufactured.

Method used

The split top mold structure is adopted, including the upper mold and the lower mold. Through the exhaust slot and negative pressure chamber, the air is discharged smoothly, and the exhaust efficiency is improved through the negative pressure device.

Benefits of technology

It effectively avoids defects such as air holes, insufficient pouring and flow marks in the rims of the hub casting, reduces the cost of mold production, and improves casting quality and assembly efficiency.

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Abstract

The utility model relates to the technical field of hub casting molds, and discloses a split type top mold structure which comprises a top mold body, the top mold body is divided corresponding to a rim part of a hub casting to form a split type structure comprising an upper mold and a lower mold, and isolation tables used for supporting the upper mold are arranged on the upper end face of the lower mold at intervals in the circumferential direction. And an exhaust gap for exhausting is formed between the upper die and the lower die. The top die is arranged in a split mode, the upper die and the lower die can be machined and manufactured independently, manufacturing of cooling structures such as an air pipe and a water way is facilitated, and the manufacturing cost of the hub die is reduced; the arrangement of the exhaust seam is beneficial to smooth exhaust of air at the rim part, and the defects of air holes, insufficient casting, flow marks and the like at the rim part of the hub casting are avoided; the positioning structure improves the assembly precision of the top die, ensures the casting quality, ensures the accurate alignment of a bolt hole and a threaded hole, and improves the assembly efficiency; and due to the arrangement of the negative pressure cavity, the exhaust efficiency is improved, and gas in the cavity is exhausted more thoroughly.
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