A precision investment casting manufacturing method of a megawatt liquid-cooled charging gun cooling pipeline

By employing a full silica sol investment casting process and precise heat treatment, the problems of high cost and low reliability of liquid-cooled charging gun cooling pipes in investment casting have been solved, achieving high-density and low-cost integrated molding, which is suitable for mass production.

CN122125173APending Publication Date: 2026-06-02HUIDONG COUNTY JIBANG HARDWARE PROD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUIDONG COUNTY JIBANG HARDWARE PROD
Filing Date
2026-03-31
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing liquid-cooled charging gun cooling pipes are costly to manufacture in investment casting, have rough internal surfaces, insufficient density, and are prone to micropores and microcracks, resulting in low reliability and difficulty in adapting to high-pressure and frequent hot-cold cycles.

Method used

Employing a full silica sol investment casting process, combined with a directional gating system and precise heat treatment, the process involves wax pattern preparation, shell preparation, molten metal melting and pouring, casting cleaning and precision finishing, welding, and injection molding to achieve precise forming and high-performance manufacturing of the cooling pipes for liquid-cooled charging guns.

Benefits of technology

It achieves high density, low cost, and integrated molding of the cooling pipe for liquid-cooled charging guns, improving internal cleanliness and reliability, making it suitable for mass production and meeting the requirements of high-voltage and frequent plugging/unplugging operations.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a method for precision casting of a megawatt-level liquid-cooled charging gun cooling pipe, comprising the following steps: wax molding using a customized metal mold to obtain a single wax model; the wax model and gating system forming a wax welding tree assembly; the wax welding tree assembly employing a full silica sol shell-making process, with a face layer, transition layer, back layer, and sealing slurry applied in stages to form a shell; the shell is first placed in a steam dewaxing kettle for dewaxing, then placed in a roasting furnace to remove residual impurities; the molten casting substrate is directionally poured into the shell, cooled to form a casting; the casting undergoes rough finishing and precision finishing to obtain the main body of the casting; the main body of the casting is welded to accessories; after welding, injection molding is performed; and finally, the finished product is obtained after passing inspection. This invention addresses the structural characteristics and performance requirements of liquid-cooled charging gun cooling pipes by employing a full silica sol precision casting process, combined with a dedicated wax model forming mold, a directional gating system, and subsequent precise heat treatment processes, to achieve integrated precision molding of the liquid-cooled charging gun cooling pipe.
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