| 摘要 |
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 ( 32' ) 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 ( 52 ) 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 the die, means being provided to urge the radial deformation means ( 22, 25, 62, 65 ) in the centrifugal direction during the forming of the container headpiece ( 52 ).
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