A process for manufacturing a can with a polygonal cross...

B - Operations – Transporting – 65 – D

Patent

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B65D 1/18 (2006.01) B21D 51/26 (2006.01) B65D 1/46 (2006.01) B65D 6/02 (2006.01)

Patent

CA 2291030

A process for manufacturing a can with a polygonal cross section and a can with a polygonal cross section, the process comprising the steps of: milling the cylindrical lateral wall of a tubular body (10), providing said wall with a plurality of circumferential ribs (20), which are continuous and axially spaced from each other and defined by a certain degree of radial plastic deformation of the respective circumferential region of the cylindrical lateral wall of the tubular body (10); expanding the formed tubular body (10), deforming it, in order to define longitudinal edges (12) in whose region the circumferential ribs (20) are eliminated; and double-seaming a bottom and an upper wall of the can to the tubular body (10). This process defines a can having any polygonal cross section and circumferential ribs (20) on the lateral wall thereof, between the longitudinal edges (12).

L'invention porte sur un procédé de fabrication d'un bidon de section transversale polygonale et sur le bidon obtenu. Ce procédé consiste à: fraiser la paroi latérale cylindrique d'un corps tubulaire (10), doter cette paroi d'une pluralité de nervures (20) circonférentielles qui sont continues et espacées les unes des autres axialement et obtenues par déformation radiale d'une certaine quantité de matière plastique de la région circonférentielle de la paroi latérale cylindrique du corps tubulaire (10); dilater le corps tubulaire obtenu, le déformer de façon à obtenir des bords longitudinaux (12) dans cette région où les nervures (20) circonférentielles sont éliminées; et faire une double soudure avec une paroi inférieure et une paroi supérieure du bidon sur le corps tubulaire (10). Ce procédé permet d'obtenir un bidon de section transversale polygonale formé de nervures circonférentielles (20) sur sa paroi latérale, entre les bords longitudinaux (12).

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