FR2473570A2 - CYLINDRICAL EXTENSION FOR TUBULAR MATERIAL, MAINTAINED IN PLACE OUTSIDE - Google Patents

Abstract

The invention relates to a cylindrical expander for tubular material, held in place from the outside. Said expander, intended to treat a tubular material 3, is provided with guide elements 1, the periphery of which has corrugations or grooves 2. The recesses 2a of these corrugations 2 are pierced with holes 5 which, opening into the internal space of said expander, prevent the liquid for treating said material 3, projected by spray nozzles 4, from accumulating in said hollows 2a. Application in particular to cylindrical wideners intended for the treatment of the tubular material with a liquid. (CF DRAWING IN BOPI)

Description

2473570-

  The present addition relates to a cylindrical expander for tubular material, held in place of

  the outside and comprising a central support support deployed

  and radially adjustable, as well as guide elements in the form of sections supported by said supports, this expander being intended in particular to treat the tubular material by means of liquid products, as described in the main patent. At the respective ends of the central support, there is a longitudinally decreasing cross-sectional member, which constitutes an input or output member, said guide members extending in the longitudinal direction between these two members. In an alternative embodiment according to the main patent, at least the region of the surface face of the guiding elements subjected to the action of the treatment liquid has

  protuberances in the form of corrugations oriented perpendicularly

  stretching in the sense of training of the material. These protuberances

  beries favor the action of the treatment agent and also facilitate the routing of the material along the expander. In addition, according to the main patent, spray nozzles of the treatment agent are arranged in a ring around the expander, so that

  that the direction of the sprayed liquid is directed essentially

  towards the hollows of the corrugations or grooves.

  It has been found, in practice, that the liquid can accumulate, during spraying, in the hollows of the corrugations, although these recesses are laterally open.

  towards the longitudinal edges of the guide elements.

  Such an accumulation can prevent the treatment liquid from acting irreproachably. When the tubular material is insufficiently stretched, it can even possibly, as a result of the ejection pressure of the nozzles, be pushed against regions of the hollows of the corrugations and adhere

  more or less strongly, which makes it difficult to

matter.

  The present invention therefore aims to remedy this drawback and to prevent the liquid from accumulating

  or that the tubular material remains stuck.

  According to the essential characteristics of the

  vention, the hollows of the corrugations or grooves are pierced

  holes opening into the internal space of the expander.

  Under these conditions, the treatment agent can no longer accumulate in the hollows of the undulations and an irreproachable action of this treatment liquid on the

  both sides of the material is guaranteed.

  The invention will be described in more detail with reference to the accompanying drawing by way of non-limiting example and

  on which the single figure is a fragmentary longitudinal section

  ment of a guide element of an expander.

  The upper face of a guide element 1 presents

  corrugated protuberances 2 shaped into a groove.

  Between the crests are hollows 2a. The journey traveled

  ru by a tubular material 3 to be treated is

  lustrous by two mixed lines. The only contact of this man

  with the extender is essentially

  through corrugated protuberances.

  In the main patent, spray nozzles 4 are arranged outside the expander. The jets thrown by these nozzles are oriented towards the recesses 2a. The treatment liquid, coming from the nozzles 4 and passing through the material 3, accumulates in said recesses 2a. Through passage holes 5 formed in the corrugation recesses, this treatment liquid can flow, which prevents its

accumulation in said hollows.

  It goes without saying that many modifications can

  can be made to the expander described and represented,

  without departing from the scope of the invention.

Claims (1)

CLAIM   Cylindrical widener for tubular material, held in place from the outside and comprising a central support radially deployable and deployable supports, and guide elements in the form of sections which, sup-   carried by said supports, extend in the longitudinal direction   dinal said expander, between two members of section de-   growing in the longitudinal direction, which constitute respectively   an insertion member and an output member, said guide elements having, at least on a part of their surface face, corrugated protuberances shaped in grooves and oriented perpendicular to the driving direction of said tubular material, according to   claim 1 of the main patent, a typical enlarger   in that holes (5) opening into the space indi-   dull said expander, are formed in the recesses (2a) corrugations or grooves (2).