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    • 4. 发明授权
    • Shell forming apparatus and process
    • 外壳成型设备及工艺
    • US4644775A
    • 1987-02-24
    • US745304
    • 1985-06-14
    • Francis J. Fuchs, Jr.
    • Francis J. Fuchs, Jr.
    • B21D17/02B21D22/26B21D35/00B21K21/06B21D22/20
    • B21K21/06B21D17/02B21D22/26B21D35/00
    • Apparatus and process of manufacture for forming a generally cylindrical shell having an interior surface, an opened end with a first internal diameter, a generally closed opposite end, a first internal portion intermediate the ends with a second internal diameter larger than the first internal diameter, and a second internal portion intermediate the first internal portion and the closed end with a third internal diameter larger than the second internal diameter, wherein such apparatus and process of manufacture include a mandrel having an outer surface for forming the interior surface of the shell and having an expandable and contractable intermediate portion, the mandrel intermediate portion expandable outwardly to form its second internal portion and upon the shell being formed the mandrel intermediate portion contractable inwardly sufficiently to permit the mandrel to be moved relatively away from the formed shell through the open end to permit the formed shell and the mandrel to be separated.
    • 用于形成具有内表面的大致圆柱形外壳的装置和制造方法,具有第一内径的开口端,大致封闭的相对端,具有大于第一内径的第二内径的端部之间的第一内部部分, 以及第二内部部分,其在第一内部部分和封闭端之间具有大于第二内径的第三内径,其中这种设备和制造方法包括具有用于形成壳体的内表面的外表面的心轴,并具有 可扩张和可收缩的中间部分,心轴中间部分可向外扩展以形成其第二内部部分,并且在形成壳体的情况下形成心轴中间部分,该中心部分可向内收缩以向内收缩,以允许心轴相对远离形成的壳体通过开口端移动到 允许形成的外壳和心轴b e分开。