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    • 1. 发明授权
    • Methods and apparatus for redrawing thin-walled container bodies
    • 重画薄壁容器体的方法和装置
    • US5315858A
    • 1994-05-31
    • US979279
    • 1992-11-20
    • Dieter K. NaggertJames J. TangRobert J. Gruodis
    • Dieter K. NaggertJames J. TangRobert J. Gruodis
    • B21D22/28B21D22/22
    • B21D22/28
    • Methods and apparatus for redrawing a drawn cup are disclosed. In particular, the methods and apparatus disclosed are directed to redrawing a container body for use in a two piece beverage container. The redraw operation uses a redraw sleeve and a redraw ring that prevent wrinkles when a thin gauge metal is employed. The wrinkles are prevented by providing cooperating displacements on the surfaces of the redraw ring and the redraw sleeve that clamp the bottom surface of the cup that is being redrawn. This displacement provides a convoluted path through which the metal is pulled during the redraw operation to increase the resistance to being drawn and the tension in the side wall, thereby substantially eliminating wrinkles.
    • 公开了一种用于重绘拉丝杯的方法和装置。 特别地,所公开的方法和装置旨在重新绘制用于两件式饮料容器的容器主体。 重画操作使用重画袖子和重画环,当使用薄规格金属时,可以防止皱纹。 通过在重画环的表面上提供配合的位移以及夹紧正被重新拉伸的杯的底表面的重拉套来防止皱纹。 该位移提供了一个回旋路径,金属在再拉拔操作期间通过该路径被拉动,以增加拉伸阻力和侧壁中的张力,从而基本上消除皱纹。