Method and apparatus for forming a steel pressure container,...

B - Operations – Transporting – 21 – D

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B21D 51/24 (2006.01) B01J 3/04 (2006.01) B21D 51/26 (2006.01) B65D 1/02 (2006.01) F16J 12/00 (2006.01) G21C 13/00 (2006.01)

Patent

CA 2658903

The invention relates to a method for forming a steel container (1) having a curled open end, comprising the steps of : i) providing a steel cup (11); ii) deep drawing the steel cup (11) into a drawn container preform (12); iii) thin drawing the body of the drawn container preform; and iv) curling an open end of the drawn container preform by forming a precurl (16) and by curling the precurl (16) into an elongated curl (19), to a apparatus for forming a steel container (1), and to such steel container (1) and its preform.

Cette invention concerne une méthode de fabrication d'un récipient en acier (1) doté d'une partie d'extrémité ouverte roulée, comprenant les étapes consistant à : i) introduire une coupelle en acier (11); ii) réaliser l'emboutissage profond de la coupelle en acier (11) dans une préforme de contenant embouti (12); iii) à réaliser un emboutissage mince du corps de la préforme de contenant embouti; et iv) rouler une partie d'extrémité de la préforme de contenant embouti en réalisant le préroulage (16) dans une boucle allongée (19) sur un dispositif de manière à réaliser un contenant en acier (1); le contenant en acier (1) et sa préforme.

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