Heat shrinkable member

Details Heat shrinkable member Heat shrinkable member

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 47/00 (2006.01) B29C 65/34 (2006.01) F16L 47/22 (2006.01) F16L 59/20 (2006.01) B29C 53/40 (2006.01)

Patent

CA 2271850

A casing member for forming a connection between tubular sections. The member has heat shrinkable end portions (51a, 51b), for connecting on respective adjacent end surfaces of the tubular sections (13, 14) adjacent the joint (19), and a middle portion (51) for spanning between the end surfaces of the tubular sections (13, 14). The end portions (51a, 51b) are formed integrally with at least a portion of the middle portion (51) and have a zone that has a relatively small wall thickness while the middle portion (51) having a relatively large wall thickness. This member may be made by heat shrinking a sleeve on an inner core on a mandrel or by uniting opposed ends of a heat shrink sheet having one or more auxiliary layers bonded to it. The properties of the core or auxiliary layer or layers may be tailored to provide desired properties or capabilities.

L'invention a trait à un élément de gainage permettant une connexion entre sections tubulaires. Cet élément est pourvu de parties d'extrémité thermorétractables (51a, 51b), aux fins d'une connexion à des surfaces d'extrémité adjacentes respectives des sections tubulaires (13, 14) adjacentes au joint (19), ainsi que d'une partie médiane (51) faisant la jonction entre les surfaces d'extrémité des sections tubulaires (13, 14). L'épaisseur de la paroi des parties d'extrémités (51a, 51b), solidaires d'au moins une partie de la partie médiane (51), est relativement importante. On peut produire cet élément par thermorétraction d'un fourreau sur une âme interne sur un mandrin ou en réunissant les extrémités opposées d'une feuille thermorétractable recouverte d'une couche ou de plusieurs couches auxiliaires. Il est possible d'adapter les caractéristiques de l'âme ou bien de la couche ou des couches auxiliaires afin de conférer à l'ensemble des propriétés et des capacités souhaitées.

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