Backward extrusion method and product

Details Backward extrusion method and product Backward extrusion method and product

B - Operations, Transporting

21

C

B21C 23/20 (2006.01) B21C 23/22 (2006.01)

Patent

CA 2201312

A method of forming a closed-end vessel by backward extrusion comprises providing an extrusion billet having a front surface with an axial recess and a body of an extrudable material positioned in the recess. Backward extrusion results in the formation of a closed-ended vessel, for example a pressurized gas cylinder, composed of the material of the extrusion billet with a weld bonded inner surface lining of the extrudable material.

Procédé de fabrication d'un récipient à extrémité fermée (24) par extrusion inverse à partir d'une billette d'extrusion (18) possédant une surface avant (16) pourvue d'un évidement axial et d'un corps (20) en matériau extrudable placé dans l'évidement. Ce procédé d'extrusion inverse permet d'obtenir un récipient (24) à extrémité fermée, par exemple, un cylindre de gaz sous pression composé du matériau de la billette d'extrusion (18) et pourvu d'un revêtement (28) de surface intérieure appliqué par soudure et constitué par le matériau extrudable.

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