Method for changing the shape of a can, and can shaped in this way
OwnerSjoerd Odrik Van Der Veen, Marike Hermine Bernadet Rupertinventors
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Abstract
The invention relates to a method for changing the shape of a can (2), which can has a can wall, such as a deep-drawn can or a wall-ironed can, the can being positioned in or around a die (1), which die is provided with a surface with, for example, a relief, embossings or thickened sections, after which the can wall is pressed into the shape of the die by means of at least one jet of a high-pressure medium which is moved along the can wall. According to the invention, a supporting layer (3), which supports the can wall during the deformation of the can wall, is arranged between the can wall and the die. The invention also relates to a can shaped using the method.
Claims19
A method for changing the shape of a can, which can has a can wall, such as a deep-drawn can or a wall-ironed can, the can being positioned in or around a die, which die is provided with a surface with, for example, a relief, embossings or thickened sections, after which the can wall is pressed into the shape of the die by means of at least one jet of a high-pressure medium which is moved along the can wall, characterized in that a supporting layer, which supports the can wall during the deformation of the can wall, is arranged between the can wall and the die.
The method as claimed in one of the preceding claims, characterized in that a layer of deformable material made from plastics or rubber is used.
The method as claimed in one of the preceding claims, characterized in that a layer of deformable material with a hardness of less than 90 Shore D is used.
The method as claimed in one of the preceding claims, characterized in that a layer of deformable material with a density of between 1000 and 7800 kg/m3, preferably between 2500 and 5000 kg/M3, is used.
The method as claimed in one of the preceding claims, characterized in that the jet of the medium is guided helically along the can wall.
The method as claimed in one of the preceding claims, characterized in that the expansion of the can amounts to at most approximately 10%, preferably at most 5%.
The method as claimed in one of the preceding claims, characterized in that the medium used is a water jet at a pressure of between 3000 and 5000 psi.
Dependencies are inferred from the claim text.