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    • 5. 发明申请
    • MOULD FOR FORMING THE HEADPIECE OF DEFORMABLE TUBULAR PLASTIC CONTAINERS
    • 用于形成可变形管式塑料容器盖的模具
    • WO03053649B1
    • 2003-09-04
    • PCT/EP0213877
    • 2002-12-05
    • SACMIBERGAMI STEFANOZUFFA ZENO
    • BERGAMI STEFANOZUFFA ZENO
    • B29C31/00B29C43/18B29C43/36B29C43/42B29C45/14B29L23/20B29C33/00
    • B29C43/42B29C31/008B29C43/18B29C43/3607B29C45/14598B29C2045/14606B29K2105/258B29L2001/00B29L2023/20
    • The mould comprises a punch (10) having an outer surface (11') arranged to engage the container tubular body (51) as an exact fit, and an end portion (13) projecting axially from the lower end of the cylindrical outer surface (11'), and a die (30) arranged to form, in combination with the lower surface (13') of the punch, a cavity (F) for forming the headpiece (52) of the container; the die (30) has a concave surface 832') arranged to receive as an exact fit, by axial penetration, the lower end of the cylindrical outer surface (11') of the punch together with the lower end of the tubular body (51) of the container. The headpiece 852) is formed within the forming cavity (F). According to the invention, the punch (10) comprises a radial deformation means (22, 25, 62, 65), positioned on its outer surface (11') and extending annularly along the entire circumference of this surface to act on the tubular body (51) of the container, and is arranged to assume a normal position in which its outer surface does not project radially from the cylindrical outer surface (11') of the punch, and an active position in which it is urged in a centrifugal direction in such a manner as to press the tubular body (51) against the opposing surface of teh die, means being provided to urge the radial deformation means (22, 25, 62, 65) in the centrigal direction during the forming of the container headpiece (52).
    • 所述模具包括冲头(10),所述冲头(10)具有布置成与所述容器管状体(51)精确配合的外表面(11')和从所述圆筒形外表面的下端轴向突出的端部(13) 和用于与冲头的下表面(13')组合形成用于形成容器的头部件(52)的空腔(F)的模具(30) 模具30具有凹形表面832'),该凹形表面832'被布置成通过轴向穿透将冲头的圆柱形外表面(11')的下端与管状体(51)的下端 )的容器。 头戴件852)形成在成形腔(F)内。 根据本发明,冲头(10)包括位于其外表面(11')上并沿该表面的整个圆周环形延伸的径向变形装置(22,25,62,65)以作用于管状体 (51),并且被布置成呈现其正常位置,在该正常位置中,其外表面不是从冲头的圆柱形外表面(11')径向突出,而是处于其在离心方向上被推动的活动位置 以便将管状体(51)压靠在模头的相对表面上,设置有用于在形成容器头部件期间沿着向心方向推动径向变形装置(22,25,62,65)的装置 (52)。