Die assembly

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 57/04 (2006.01) B21D 17/02 (2006.01)

Patent

CA 2467402

The die assembly is disclosed for forming a bead on a cylindrical tube. The assembly includes a holder (24) which secures the tube (10) against axial movement so that a portion of the tube protrudes outwardly from the holder (24) along a predetermined axis and in which the holder has a forming surface (30) circumscribing the tube. The die assembly further includes a first die part (36) having a cylindrical mandrel (40) aligned with and slidably receivable into the outwardly protruding portion of the tube. A tubular cylindrical sleeve is mounted to the first die part (36) so that the sleeve is coaxial with the mandrel (40) and so that the tube extends between the mandrel (40) and the sleeve. The sleeve also includes a conical surface coaxially formed about a free end of the sleeve. A second die part (60) has a throughbore complementary in size and shape to the outer periphery of the sleeve so that the sleeve is slidably receivable within the throughbore.

L'invention concerne un ensemble filière conçu pour former un boudin sur un tube cylindrique. Ledit ensemble comprend un support (24) qui immobilise le tube (10) à l'encontre de tout mouvement axial, de sorte qu'une partie du tube saille vers l'extérieur du support (24), le long d'un axe prédéterminé, ledit support comportant une surface de formage (30) entourant le tube. L'ensemble filière comprend également une première partie de filière (36) dotée d'un mandrin cylindrique (40) aligné avec la partie saillant vers l'extérieur du tube et logé coulissant dans cette dernière. Une gaine cylindrique tubulaire est montée sur la première partie de filière (36), de sorte que la gaine soit coaxiale au mandrin (40) et que le tube s'étende entre le mandrin (40) et la gaine. La gaine comprend également une surface conique formée coaxialement autour d'une extrémité libre de la gaine. Une seconde partie de filière (60) possède un orifice traversant dont la forme est complémentaire de la périphérie extérieure de la gaine, de sorte que cette dernière puisse se loger coulissante dans l'orifice traversant.

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