WO2011051147A2 - Support hélicoïdal - Google Patents

Support hélicoïdal Download PDF

Info

Publication number
WO2011051147A2
WO2011051147A2 PCT/EP2010/065787 EP2010065787W WO2011051147A2 WO 2011051147 A2 WO2011051147 A2 WO 2011051147A2 EP 2010065787 W EP2010065787 W EP 2010065787W WO 2011051147 A2 WO2011051147 A2 WO 2011051147A2
Authority
WO
WIPO (PCT)
Prior art keywords
strip
laser
helical support
base material
plastic base
Prior art date
Application number
PCT/EP2010/065787
Other languages
English (en)
Other versions
WO2011051147A3 (fr
Inventor
Thilo Simonsohn
Original Assignee
Tyco Electronics Raychem Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tyco Electronics Raychem Gmbh filed Critical Tyco Electronics Raychem Gmbh
Publication of WO2011051147A2 publication Critical patent/WO2011051147A2/fr
Publication of WO2011051147A3 publication Critical patent/WO2011051147A3/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
    • H02G15/182—Cable junctions protected by sleeves, e.g. for communication cable held in expanded condition in radial direction prior to installation
    • H02G15/1826—Cable junctions protected by sleeves, e.g. for communication cable held in expanded condition in radial direction prior to installation on a removable hollow core, e.g. a tube
    • H02G15/1833—Cable junctions protected by sleeves, e.g. for communication cable held in expanded condition in radial direction prior to installation on a removable hollow core, e.g. a tube formed of helically wound strip with adjacent windings, which are removable by applying a pulling force to a strip end
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56—Winding and joining, e.g. winding spirally
    • B29C53/58—Winding and joining, e.g. winding spirally helically
    • B29C53/78—Winding and joining, e.g. winding spirally helically using profiled sheets or strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/06—Making preforms having internal stresses, e.g. plastic memory
    • B29C61/0608—Making preforms having internal stresses, e.g. plastic memory characterised by the configuration or structure of the preforms
    • B29C61/065—Preforms held in a stressed condition by means of a removable support; Supports therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1632—Laser beams characterised by the way of heating the interface direct heating the surfaces to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B29C65/1658—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined scanning once, e.g. contour laser welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1677—Laser beams making use of an absorber or impact modifier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/76—Making non-permanent or releasable joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
    • B29C66/12841—Stepped joint cross-sections comprising at least one butt joint-segment comprising at least two butt joint-segments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4329—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms the joint lines being transversal but non-orthogonal with respect to the axis of said tubular articles, i.e. being oblique
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/49—Internally supporting the, e.g. tubular, article during joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1664—Laser beams characterised by the way of heating the interface making use of several radiators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • B29C66/0242—Heating, or preheating, e.g. drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7377—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline
    • B29C66/73771—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being amorphous
    • B29C66/73772—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being amorphous the to-be-joined areas of both parts to be joined being amorphous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81463—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types

Definitions

  • the invention relates to a helical support for radially supporting an elastically expanded tube, a tube arrangement comprising an elastically expanded tube being radially expanded by a helical support, and a method for producing a helical support.
  • Insulating tubes or sleeves are used to provide an electrical insulation or sealing of electrical components.
  • cable joints in the field of power engineering are insulated by means of a tube material disposed around the connecting zone.
  • Cold applied insulating tubes are usually provided in an expanded state and fitted on one of the cables before their connection. After connecting the cables, the tube is slid towards the cable joint and shrunk in order to tightly engage the connected cables.
  • a helical support is inserted into the tube, which radially supports the same.
  • the helical support which is also referred to as "spiral holdout" usually comprises a profiled ribbon or strip consisting of a plastics material like for example polypropylene.
  • the strip is wound in the form of a helix, wherein side portions of adjacent windings of the helix are connected to each other.
  • the helical support has an inner diameter greater than the outer diameter of the electrical component to be engaged, thus making possible a free sliding of the tube.
  • the helical support is manually removed from the insulating tube.
  • the helical support is gradually released by unwinding the wound strip. This is done by pulling a free end of the strip which extends through the helical support.
  • the insulating tube gradually shrinks and contracts around the electrical component, which is therefore insulated and sealed.
  • the windings are connected to each other in a releasable manner.
  • laser welding is carried out in the manufacture of a helical support, wherein laser radiation emitted by a laser radiation source is directed to the strip profile in the course of winding the strip to a helix.
  • the weld strengths of the connected windings are in a defined range, whereby a specification with narrow tolerances for the pull forces, for example 20N to 60N, applied for releasing the helical support may be met.
  • conventional manufacture of helical supports by means of laser welding usually requires an accurate control of the process parameters as well as of the strip profile.
  • perfomiing a laser welding process it is difficult to provide the laser- welded connections of a helical support with a defined weld strength. This may be due to the applied process speed (i.e.
  • a welding speed of for example 150 - 300mm/sec to deviations of the strip profile dimensions and the profile shape (flatness, axial orientation), and to the profile surface (roughness). If the material of the strip has a high coefficient of absorption for the selected laser source, the process is very sensitive to the above mentioned deviations. In addition, the cleanliness of the profile surface in the welding area may have a further impact.
  • a helical support for radially supporting an elastically expanded tube comprises a strip wound in the form of a helix having a number of windings, wherein side portions of adjacent windings are connected to each other by means of a laser-welded connection.
  • the whole strip is formed of a material mixture including a plastic base material and an additive material.
  • a method for producing a helical support for radially supporting an elastically expanded tube comprises providing a strip, winding the strip in the form of a helix having a number of windings, and performing a laser welding process in order to connect side portions of adjacent windings to each other by means of a laser-welded connection.
  • providing the strip comprises forming the whole strip of a material mixture including a plastic base material and an additive material.
  • Forming the whole strip of a material mixture including a plastic base material and an additive material makes it possible to provide the connected windings with a defined weld strength or a more uniform weld strength in a defined range, respectively. Consequently, the helical support may be manually released in an easy and reliable manner. Applying a material mixture also provides a wider process window for the applied laser welding process, and for a process carried out for producing the strip. As a consequence, demanding of narrow geometrical and shape tolerances for the strip profile and rigorous requirements for a device applied for perfomiing the laser welding process (stiffness, type of profile handling, etc.) may be avoided.
  • the plastic base material is substantially transparent and the additive material is absorbing for laser radiation applied in the laser welding process for fomiing the laser-welded connection.
  • the degree of absorption and thus the resulting weld strength of the connection may be defined and therefore driven accurately through selection of type(s), amount(s) and distribution of laser absorbing additive(s) or filler(s).
  • the additive material may for example comprise color pigments, glass fibers, mica and/or chalk.
  • the plastic base material is absorbing for laser radiation applied in the laser welding process for fomiing the laser-welded connection, wherein the additive material provides a reduced weld strength of the laser- welded connection.
  • the connected windings of the helical support may also have a defined weld or connection strength, thus making possible an easy and manual unwinding of the helical support.
  • reducing the weld strength may be dependent on the type(s), amount(s) and distribution of additive(s) and/or on the produced weld temperature.
  • An additive material which may be used to provide a reduced weld strength of a laser- welded connection is for example cycloolefin copolymer.
  • the plastic base material a plurality of plastic or polymer materials may be used.
  • the plastic base material comprises
  • the plastic base material comprises an acrylonitrile butadiene styrene (ABS) plastic material. It is also possible that the plastic base material comprises polyethylene, and/or a copolymer of polypropylene or polyethylene.
  • the strip is an extruded strip. Due to the usage of a material mixture for the strip and the respective positive effect on the laser welding process, the extrusion process may be carried out with a wide process window. If applicable, potential problems associated with an extrusion process like for example deviations of the extruded strip profile and shape, surface roughness, etc. do only have a small impact on the laser welding process or may be neglected, respectively. This also applies to potential residues like for example release and friction agents coming from the extrusion process and being located on the strip due to an insufficient removal or cleaning._
  • the weld strength of the laser-welded connection corresponds to a (mean) pull force between 20N and 60N, the pull force being applied for releasing the helical support by unwinding the wound strip.
  • a weld strength makes it possible to release the helical support in an easy and uncomplicated manner.
  • a tube arrangement comprises a helical support according to the preceding description and an elastically expanded tube being radially expanded by the helical support.
  • the helical support may be manually released in an easy and reliable manner after assembly of the tube arrangement on an electrical component to be insulated or enclosed, respectively.
  • Figure 1 shows a schematic illustration of a helical support comprising a wound profiled strip
  • Figure 2 shows a schematic cross-sectional illustration of the strip of the helical support
  • Figure 3 shows a further cross-sectional illustration of adjacent windings of the wound strip connected to each other by laser-welded connections;
  • Figure 4 shows a schematic top view of two adjacent windings
  • Figure 5 shows a schematic illustration of a production device for fabricating the helical support by means of laser welding
  • Figure 6 shows a schematic illustration of a tube arrangement comprising an elastically expanded tube being radially expanded by the helical support.
  • the embodiments described in the following relate a helical support and to a method for producing a helical support, wherein a profiled strip is wound to form a helix, and windings of the helix are being connected to one another by means of a laser welding process.
  • a material mixture is used for the whole strip ("mono -material” strip) in order to provide limited and distinct laser weld forces (i.e. a relatively narrow "window of weld strength").
  • the term "material mixture” relates to all types of homogeneous or heterogeneous material mixtures and blends.
  • Figure 1 shows a schematic illustration of a helical support 100.
  • the helical support 100 is formed by a strip 110 wound in the form of a helix, the helix having a plurality of windings 105. Side portions of the windings 105 are connected to each other by means of a laser- welded connection or laser weld seam, as described further below.
  • the form and profile of the strip 105 may be defined by means of an extrusion process.
  • Figure 1 also indicates an end portion of the strip 110 not being connected to the windings 105, and extending through the helix to a side of the helix (right-hand side in Figure 1). This end portion of the strip 110 is provided for releasing the helix, as described further below in connection with Figure 6.
  • Figure 2 shows an example of a cross-section of the profiled strip 110.
  • the strip 110 has a Z- like profile with an upper surface 111 and a lower surface 112 arranged in parallel to each other.
  • the strip 110 furthermore comprises two laterally projecting side portions 120, 130.
  • the two side portions 120, 130 each have a rectangular shape mating with each other in order to make possible an overlap of the side portions 120, 130.
  • the side portion 120 is defined by faces 121, 122, 123 extending between the upper and lower surface 111, 112.
  • the faces 121, 123 are arranged rectangular, and the face 122 is arranged parallel with respect to the two surfaces 111, 112.
  • the side portion 130 is defined by faces 131, 132, 133 extending between the upper and lower surface 111, 112, wherein the faces 131, 133 are arranged rectangular, and the face 132 is arranged parallel with respect to the two surfaces 111, 112.
  • the side portions 120, 130 of the windings 105 overlap one another, as is depicted in detail in Figure 3.
  • an overlap region 145 is provided at each side of a winding 105.
  • faces 121, 133 and 122, 132 of the strip 110 may adjoin, wherein a winding gap 146 may be provided between the faces 123, 131.
  • the side portions 120, 130 of adjacent windings 105 are furthermore connected to each other by means a laser- welded connection in the shape of a weld seam 140 provided between the faces 122, 132.
  • the laser weld seam 140 may for example have a continuous and straight form.
  • the laser weld connection or seam 140 may be constructed having other forms, including for example a wave-like form, a broken line or a number of weld points (not shown).
  • the strip 110 may also be provided having a different shape and geometry.
  • the strip 110 may for example be provided with side portions each having an L-shaped form, thus making possible an interlocking or engaging of the side portions (not shown).
  • the side portions or corresponding faces are connected to one another by means of a laser- welded connection, as well.
  • a method for producing the helical support 100 initially comprises providing the profiled strip 110.
  • an extrusion process may be carried out.
  • the strip material i.e. the above mentioned mixed "mono-material”
  • the extruded strip 110 may furthermore subjected to a cleaning process, in order to remove residues and agents like for example release and friction agents applied in the course of the extrusion process.
  • FIG. 5 shows an example of a production device 150 which may be used to carry out these process steps.
  • the production device 150 comprises a laser radiation source 152, a winding device 151 and a plurality of pressure rollers 153.
  • the winding device 151 is for example constructed as a mandrel. - o -
  • the provided (for example freshly extruded and cleaned) strip 110 is fed to the production device 150 in a feed direction 156.
  • the winding device 151 winds up the strip 110 in a direction of rotation 157, wherein adjacent windings 150 touch one another and overlap radially.
  • the strip 110 or a front end of the same, respectively may be attached to the winding device 151, for example by means of a clamping device (not shown).
  • the pressure rollers 153 press the strip 110 against the outer circumferential face of the winding device 151, thus forming the helical support 110 with a constant diameter.
  • the laser radiation source 152 emits a laser beam 155, which is directed on the overlapping side portions 120, 130 or faces 122, 132 of the strip 110, respectively, thereby heating up the same to a temperature at which joining or welding of the faces 122, 132 takes place (cf. Figures 2 and 3). At this, for example a continuous weld seam 140 as depicted in Figure 4 may be produced.
  • laser transmission welding at which a transparent part and a laser absorbing part are joined to each other by passing a laser beam through the transparent part to the absorbing part, a connection is effected (substantially) directly at an area or surface area irradiated by the laser beam 155. This process is therefore also referred to as "laser direct welding".
  • other devices may be used to produce the helical support 150 (not shown).
  • Concerning the laser welding process it is for example possible to provide the laser radiation source 152 at a different position with respect to the winding device 151, and to direct the laser beam 155 to the overlapping portions of the strip 110 by means of mirrors or deflecting devices. Such devices may also be provided in order to periodically deflect the laser beam 155, thus producing a wave-like weld seam. Additionally, further optical devices may be applied in order to enable for example shaping and/or focusing of the laser beam 155.
  • Directing or emitting the laser beam 155 may also be carried out in an interrupted way in order to produce a partial connection, for example in the form of a broken weld seam or a number of weld points.
  • several laser radiation sources 152 may be used, or the emitted laser beam 155 may be split up in several laser beams in order to for example produce a number of (different) weld seams or patterns.
  • By means of several (separate or split up) laser beams 155 it is also possible to conduct preheating of one or both of the faces to be joined.
  • the whole strip 110 is formed of a material mixture including a plastic base material and an additive material added to the base material.
  • a "mono -material" strip 110 may be produced or extruded in an easy and cost-efficient manner, and may furthermore provide a defined weld strength or a relatively uniform weld strength in a defined range, respectively, of the connected windings 150 of the helical support 100.
  • a weld strength may be provided which corresponds to a pull force in a relatively narrow range between for example 20N and 60N, the pull force being applied for releasing the helical support 100 by unwinding the wound strip 110.
  • a weld strength of such magnitude allows for manually unwinding the helical support 100 in an easy, uncomplicated and reliable manner. Peaks of the weld strength of for example up to 100N may also be tolerable for this purpose.
  • Applying a material mixture furthermore provides a relatively wide or reasonable process window for a process carried out for producing the strip 110 and for the laser welding process, wherein the above mentioned specification of the weld strength may reliably be met.
  • potential problems like for example deviations of the extruded strip profile and shape, surface roughness, etc. do only have a small impact on the laser welding process or may be neglected, respectively.
  • potential residues like for example release and friction agents coming from the extrusion process and being located on the strip due to an insufficient removal or cleaning. Consequently, demanding extraordinarily narrow profile tolerances for the strip 110 in terms of dimensions, shape and surface as well as demanding a robust, well controlled and self- adjusting laser welding device may be avoided.
  • the plastic base material is substantially transparent and the additive material is absorbing for laser radiation applied in the laser welding process.
  • the pure plastic base material i.e. without the additive material
  • the pure plastic base material provides no or only little absorption with respect to the selected laser radiation or the wavelength of the same, respectively (low coefficient of absorption). That means that irradiating the pure plastic base material does not produce a temperature sufficient for welding.
  • the additive material which is intenriixed with or included in the plastic base material, an absorption appropriate for welding is provided.
  • the degree of absorption and thus the resulting weld strength may be defined and therefore driven accurately through selection of type(s), amount(s) and distribution of laser absorbing additive(s) or filler(s).
  • the plastic base material may for example be an acrylonitrile butadiene styrene (ABS) plastic material or polypropylene (PP).
  • ABS acrylonitrile butadiene styrene
  • PP polypropylene
  • a laser radiation source 152 is selected which emits laser radiation 155, wherein the respective base material is substantially transparent for the selected laser radiation 155.
  • the additive material a number of different materials may be applied.
  • the additive material may also be applied in different forms, for example in the form of particles, pigments, fibres, etc.
  • the additive material may for example be provided in the form of color pigments, glass fibers, mica and/or chalk.
  • the plastic base material is absorbing for the laser radiation applied in the laser welding process, wherein the additive material provides a reduced weld strength of the laser- welded connection.
  • the additive material provides a reduced weld strength of the laser- welded connection.
  • the pure plastic base material (i.e. without the additive material) may provide a relatively high degree of absorption with respect to the selected laser radiation or the wavelength of the same, respectively. Irradiating the pure plastic base material may therefore result in a relatively high weld strength.
  • the weld strength may be reduced to a certain degree or factor. As an example, the reduction may for example be 50%. Reduction of the weld strength may be dependent on the type(s), amount(s) and distribution of additive(s) and/or on the produced weld temperature. At this, an additive material may for example act comparably to a release agent.
  • the plastic base material may again for example be an ABS plastic material or PP.
  • a laser radiation source 152 is selected which emits laser radiation 155 being (inherently) absorbed by these materials. With respect to PP, this condition may for example be met by means of a C02 laser.
  • a potential additive material providing a reduced weld strength is for example amorphous cycloolefin copolymer (COC).
  • Figure 6 shows an example of a tube arrangement in which an expanded insulating tube or sleeve 160 is radially supported by a helical support 100, the helical support 100 being produced according to the preceding description.
  • the tube 160 may for example be made of a resilient, electrically insulating material like for example silicone.
  • the tube 160 may be used to electrically insulate electrical components, for example cable joints in the field of power engineering.
  • the tube 160 may comprise other (e.g. additionally conductive) materials and may be used for other purposes.
  • the helical support 100 is inserted into the tube 160, so that the tube 160 is kept in its expanded state before the assembly.
  • the expanded tube 160 may comprise a diameter corresponding to its original diameter multiplied by a factor of between two to four.
  • the helical support 100 may be exposed to a radial force in the range of for example ten bar.
  • the helical support 100 furthermore comprises an inner diameter greater than the outer diameter of the electrical component to be insulated or engaged, respectively, wherein a free sliding of the tube arrangement is made possible.
  • the helical support 100 may be gradually released by pulling a free end of the strip 110 extending through the helix (at the right-hand side in Figure 6), thereby unwinding the connected windings 105. As soon as the helical support 100 is removed, the expanded tube 160 relaxes and contracts around the respective component as indicated in Figure 6. Due to the above described material mixture of the strip 110 and consequently the defined and limited weld strength provided in the laser welding process, unwinding of the connected windings 105 of the helical support 100 may be carried out manually in an easy and reliable manner.
  • plastic base material and the additive material of the strip 110 are to be considered as examples, which may be replaced by other appropriate materials.
  • other plastic or polymer materials may be used for the base compound, such as for example polyethylene (PE), a copolymer of PP and a copolymer of PE.
  • PE polyethylene
  • a number of different additive materials may be added to a plastic base material.
  • the plastic base material may comprise a mixture of materials, as well.
  • a helical support may comprise a changing diameter (with respect to an axial longitudinal direction) instead of a constant diameter.
  • Such a helical support may be produced by means of a winding device having a changing diameter.
  • a material mixture comprising a plastic base material and an additive material added to the base material is not limited to a helical support.
  • the above description may also apply to other devices having portions to be (continuously or partially) connected to each other by means of a (releasable) laser connection or laser weld seam.
  • the connected portions may comprise a material mixture as described above. Due to the material mixture, the weld strength of the connection may again meet a predefined specification, thereby making possible a manual release of the connection in an easy and reliable manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

L'invention porte sur un support hélicoïdal (100) destiné à supporter radialement un tube dilaté élastiquement (160), lequel support comprend une bande (110) enroulée sous la forme d'une hélice ayant un certain nombre de spires (105), des parties latérales (120, 130) de spires adjacentes (105) étant assemblées l'une à l'autre au moyen d'une liaison soudée au laser (140). La bande (110) est entièrement formée d'un mélange de matière comprenant une matière de base constituée par une matière plastique et une matière additive.
PCT/EP2010/065787 2009-10-26 2010-10-20 Support hélicoïdal WO2011051147A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP09174040 2009-10-26
EP09174040.7 2009-10-26

Publications (2)

Publication Number Publication Date
WO2011051147A2 true WO2011051147A2 (fr) 2011-05-05
WO2011051147A3 WO2011051147A3 (fr) 2012-03-01

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WO (1) WO2011051147A2 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62282793A (ja) * 1986-05-30 1987-12-08 Toyo Seikan Kaisha Ltd 薄肉管状体を製作する方法
DE102006012593A1 (de) * 2006-03-16 2007-09-20 Tyco Electronics Raychem Gmbh Stützwendel und Verfahren zu dessen Herstellung
DE102006056781B4 (de) * 2006-12-01 2011-02-17 Rehau Ag + Co. Stützwendel
DE102008023963A1 (de) * 2008-05-16 2009-12-10 Tyco Electronics Raychem Gmbh Laserstrahl absorbierende Stützwendel sowie Verfahren und Vorrichtung zur Herstellung derselben

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* Cited by examiner, † Cited by third party
Title
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