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WO1992009844A1 - Ameliorations relatives a des tubes - Google Patents

Ameliorations relatives a des tubes Download PDF

Info

Publication number
WO1992009844A1
WO1992009844A1 PCT/GB1991/002071 GB9102071W WO9209844A1 WO 1992009844 A1 WO1992009844 A1 WO 1992009844A1 GB 9102071 W GB9102071 W GB 9102071W WO 9209844 A1 WO9209844 A1 WO 9209844A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
textile
flexible
composition
textile tube
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/GB1991/002071
Other languages
English (en)
Inventor
Hubert Andrieu
Daniel Caudron
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Textilver SA
T&N PLC
Original Assignee
Textilver SA
T&N PLC
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 Textilver SA, T&N PLC filed Critical Textilver SA
Publication of WO1992009844A1 publication Critical patent/WO1992009844A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/32—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
    • B29C44/322—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow articles
    • B29C48/152—Coating hollow articles the inner surfaces thereof
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow articles
    • B29C48/152—Coating hollow articles the inner surfaces thereof
    • B29C48/153—Coating both inner and outer surfaces
    • 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
    • B29C53/60—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels
    • B29C53/68—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels with rotatable winding feed member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F16L59/147—Arrangements for the insulation of pipes or pipe systems the insulation being located inwardly of the outer surface of the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F16L59/153—Arrangements for the insulation of pipes or pipe systems for flexible pipes
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils

Definitions

  • This invention relates to flexible tubing and in particular to tubing made by braiding, knitting or weaving filamentary material. Such material will hereinafter be referred to as textile tube.
  • Textile tube especially when made from glass fibre/filament, is -commonly used for thermal protection of fluid conduits.
  • brake and fuel pipes often require protection against radiant heat from an internal combustion engine exhaust system.
  • Known methods of enhancing the .thermal protection performance of textile tube include coating with a reflective layer such as aluminium foil or a resin composition incorporating aluminium flakes. More severe thermal conditions can be overcome by increasing the wall thickness of the textile tube.
  • a reflective layer such as aluminium foil or a resin composition incorporating aluminium flakes.
  • More severe thermal conditions can be overcome by increasing the wall thickness of the textile tube.
  • there are practical limits to the thickness of filament which can be economically processed into tube, especially for glass filaments.
  • a possible solution to this is to make several overlaid concentric tubes into a single tube, but this is expensive.
  • An object of the present invention is to provide a novel textile tube which can be made in a single operation.
  • a flexible textile tube comprises a -knitted or braided fabric tube provided with a flexible foamed polymeric lining over the inner surface thereof.
  • the foamed polymeric lining is preferably a silicone elastomer.
  • the textile tube is preferably made from glass fibres/filaments, although for some end uses, it may be satisfactory to employ other fibres/filaments- such as polyester.
  • the foamed polymeric lining may be formed around the outer surface of a further flexible -textile tube which serves as a liner, the further tube having a smaller diameter than the outer or main flexible tube. In such a case, the flexible foamed polymeric lining preferably fills the annular space between the two tubes.
  • a tube in which the foamed polymeric lining fills substantially the whole of the textile tube may be produced.
  • a product with a minimal or even no central bore may be used as a gasket material, for example as an oven door gasket of the kind used to prevent leakage of hot gases .
  • the outer surface of the textile tube may be treated to reduce heat absorption, for example by any of the methods described earlier.
  • the invention further includes a method of producing a flexible textile tube by the steps of braiding or knitting a tube from a plurality of textile filaments, introducing a curable foamed polymeric composition into said tube to form a flexible lining over the inner surface thereof and thereafter curing the composition in situ in the tube.
  • the polymeric composition may be caused to foam before, after or during its introduction into the textile tube.
  • the method preferably includes the step of braiding or knitting the tube around a hollow mandrel through which the curable polymeric material is introduced into the tube.
  • the method further comprises the step of forcing the curable polymeric material around an extrusion die in the mandrel which cause the composition to adhere to the inside of the tube prior to the curing step.
  • Curing is preferably carried out by subjecting the newly lined tube to heat, for example by passing the newly made tube through a heating zone.
  • the composition may be foamed before or during its introduction to the tube. However, it is preferred to use the heating step to both cause the composition to foam and to cure it in situ.
  • the method includes the step of introducing a further textile tube through the mandrel to form an inner textile liner for the foamed polymeric composition.
  • the invention also includes apparatus for carrying out the invention, the apparatus comprising a hollow mandrel provided with an inlet at one end thereof for a curable polymeric composition and at or adjacent the opposite end, an extrusion die adapted to cause the polymeric composition to flow from said opposite end as a tubular or cylindrical mass which adheres to the inner surface of a textile ube formed by knitting or braiding on said mandrel.
  • the extrusion die may include a feed aperture for an inner textile tube, so that the curable polymeric material adheres to both tubes to form a final composite tube in which the inner and outer textile tubes are separated by a foamed polymeric layer.
  • Figure 1 is a schematic view of an apparatus adapted to produce textile tube according to the invention.
  • Figure 2 is a cross-sectional side view of part of the apparatus of Figure 1, and
  • Figure 3 is a cross-sectional side view of part of Figure 2 illustrating a modified or further embodiment of the invention.
  • a • conventional textile braiding machine comprises a supporting frame 1 provided with a plurality of bobbins 2 supported for motion around the circumference of the frame 1 in the usual way under the control of drive means (not shown).
  • the filaments 3 from the individual bobbins are assembled as a conventional tubular braid 4 around a hollow mandrel 5, the latter being more clearly illustrated in Figures 2 and 3.
  • an extrusion die 6 ( Figures 2 and 3 show this in more detail).
  • the die 6 is supplied with a curable, foamable silicone elastomer composition through a tube 7 from a mixing station comprising a supply drum 8, a mixer 9 and a pump 10.
  • a tubular heat treatment oven 15 Surrounding the braid path above the extrusion die and around the fixed tube 11 (or braid 12) there is a tubular heat treatment oven 15 from which the braid 4 emerges, passes around a pulley 16 and is then taken to a winding station (not shown) where it is collected on a spool in the usual way.
  • the actual braiding operation is entirely conventional in that the bobbins circle the frame 1 following the usual sinusoidal path relative to one another.
  • the textile tube 4 produced by this is braided around the hollow mandrel 5 where the individual filaments 3 are brought together forming an interwoven (braided) structure.
  • This internal coating 18 has its inner diameter determined either by the inner fixed tube 11, or (in Figure 3) by the further braid 12 which is introduced through the centre of the extrusion die, from the bottom of the machine.
  • the further braid 12 if used, must be previously prepared. Normally this will be done by using a separate braiding machine to form a spool of the further braid.
  • the use of a further braid will necessitate some minor modification of the extrusion die, as shown in Figure 3.
  • the die is constructed with a centrally disposed inner aperture 20 through which the further braided tube 12 can pass.
  • the die itself is thus tubular with an outwardly directed annular orifice 21 at the top, (as is also seen in Figure 2).
  • the elastomer supply tube 7 is in the case of Figure 3 parallel to the further braid 12 although in the Figure 2 embodiment, this is not necessary.
  • the effect of the tubular heat treatment oven 15 on the silicone elastomer coating 18 is to cause the composition to foam and cure in situ on the inner surface of the braided tube 4, the inner diameter of the foam layer being determined by the fixed tube 11.
  • the cured foam may fill the braided tube.
  • this is within the scope of the present invention, as is the use of different diameter of braid, extrusion die and inner tube, in order to produce products of different sizes and characteristics.
  • the same basic apparatus may be used to produce foam lined or foam filled textile tubes for many different end uses, since the kind an ' d number of filaments used and the polymeric material can be altered as appropriate.
  • Figure 2 illustrates in simplified form how this may be accomplished by using an annular coating die 30 located below the oven 15.
  • the coating die 30 is conventional; it comprises an annular trough 31 whose inner edge 32 is closely spaced from the braid 4 so as to apply a coating layer of controlled thickness.
  • the coating material itself in curable liquid or semi-liquid form is supplied to the trough 31 through a feed pipe 33 from conventional mixing/compounding apparatus (not shown).
  • a typical coating material might be a silicone or acrylic polymer composition filled with aluminium flakes, the oven 15 then serving to cure both the lining material and the coating layer.
  • a 48 carrier braiding machine of the Figure 1 type was set up with a bobbin of 320 tex glass fibre yarn on each carrier- The machine was operated to form a braided tube on a mandrel 20 mm in diameter at a take-up speed of 1.2 m/minute, thereby giving a braid angle of about 60°.
  • a silicone elastomer composition comprising a material sold under the trade designation RTF 762 A/B and a foaming agent was pumped" up the inside of the mandrel to an extrusion die 19 mm in diameter. The die formed a compacted layer about 0.5 mm thick on the inside of the braid.
  • the mandrel 11 in this case -had an outside diameter of 1.1 mm.
  • the coated product was passed through the oven 15 at 300°C, the length of the oven being in this case 450 mm.
  • the heat treatment caused the silicone elastomer to f am, expanding on the order of ten times, to yield a braided textile tube with a silicone elastomer foam lining about 5 mm thick.
  • the final product had thus a 20 mm outside diameter and a 10 mm insi ' de diameter.
  • the above procedure was repeated using a further braid instead of the tube 11.
  • the further braid was of outside diameter 11 mm and was made from 544 tex yarns braided on a 96 carrier machine at a braid angle of about 47°.
  • the final product was a braided textile tube 20 mm in outside diameter with an approximately 10 mm central bore lined with braid, the annular space between the two braids being filled with cured silicone elastomer foam.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

Un tube en textile flexible tricoté ou tressé (4) est pourvu, sur sa surface interne, d'un revêtement intérieur polymère en mousse flexible (17), de préférence composé d'un élastomère de silicone. Le tube (4) est de préférence composé d'une fibre de verre ou de polyester, et, éventuellement, comprend un autre tube en textile flexible (12) comme revêtement interne, le matériau polymère flexible en mousse (17) étant enfermé entre les tubes externe (4) et interne (12).
PCT/GB1991/002071 1990-11-28 1991-11-26 Ameliorations relatives a des tubes Ceased WO1992009844A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9025923.5 1990-11-28
GB909025923A GB9025923D0 (en) 1990-11-28 1990-11-28 Improvements in and relating to tubing

Publications (1)

Publication Number Publication Date
WO1992009844A1 true WO1992009844A1 (fr) 1992-06-11

Family

ID=10686160

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1991/002071 Ceased WO1992009844A1 (fr) 1990-11-28 1991-11-26 Ameliorations relatives a des tubes

Country Status (2)

Country Link
GB (2) GB9025923D0 (fr)
WO (1) WO1992009844A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5309738A (en) * 1993-05-07 1994-05-10 The Goodyear Tire & Rubber Company Yarn feeding system for high speed knitter
US11021016B2 (en) 2017-04-17 2021-06-01 Bridgestone Americas Tire Operations, Llc Braided tire material

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6547907B1 (en) 1997-10-31 2003-04-15 Phoenix Aktiengesellschaft Method for producing a rotationally symmetric body

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2060472A (en) * 1979-09-14 1981-05-07 Dunlop Ltd Improvements in or Relating to Hose Manufacture
US4452279A (en) * 1982-02-16 1984-06-05 Titeflex Corporation Silicone/elastomer fiberglass sleeves
US4517039A (en) * 1983-06-29 1985-05-14 Caterpillar Tractor Co. Method and apparatus for making braided reinforced hose
DE3608668A1 (de) * 1986-03-14 1987-09-17 Biw Isolierstoffe Gmbh Verfahren zur herstellung eines membranartigen schlauches und nach dem verfahren hergestellter schlauch
EP0261877A2 (fr) * 1986-09-25 1988-03-30 Mercedes Textiles Limited Procédé d'extrusion continue d'une matière élastomère sur la surface intérieure d'un tissu tubulaire continu dans un métier à tisser

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE632502A (fr) * 1962-05-19
GB1038980A (en) * 1962-12-27 1966-08-17 Ici Ltd Improvements in or relating to the manufacture of cylindrical articles of thermally insulating rigid polyurethane foam
GB1207110A (en) * 1969-05-10 1970-09-30 Martin Sweets Company Inc Method of coating tubular objects with polyurethane foam
DE2331643C3 (de) * 1972-06-24 1975-10-09 Mitsubishi Petrochemical Co., Ltd., Tokio Schlauch, insbesondere Wärmeschutzschlauch
DE2525561C2 (de) * 1975-06-07 1985-11-07 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Verfahren zur kontinuierlichen Herstellung wärmeisolierter Leitungsrohre
IT1124638B (it) * 1979-10-24 1986-05-07 Pirelli Condotto termoisolato
GB2073358B (en) * 1980-04-03 1983-12-14 Shell Res Ltd Heat-insulated hose for liquefied gases
GB2166065A (en) * 1984-10-27 1986-04-30 Webco Ltd Insulated pipeline
GB8828214D0 (en) * 1988-12-02 1989-01-05 Textilver Sa Improvements in & relating to flexible tubes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2060472A (en) * 1979-09-14 1981-05-07 Dunlop Ltd Improvements in or Relating to Hose Manufacture
US4452279A (en) * 1982-02-16 1984-06-05 Titeflex Corporation Silicone/elastomer fiberglass sleeves
US4517039A (en) * 1983-06-29 1985-05-14 Caterpillar Tractor Co. Method and apparatus for making braided reinforced hose
DE3608668A1 (de) * 1986-03-14 1987-09-17 Biw Isolierstoffe Gmbh Verfahren zur herstellung eines membranartigen schlauches und nach dem verfahren hergestellter schlauch
EP0261877A2 (fr) * 1986-09-25 1988-03-30 Mercedes Textiles Limited Procédé d'extrusion continue d'une matière élastomère sur la surface intérieure d'un tissu tubulaire continu dans un métier à tisser

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5309738A (en) * 1993-05-07 1994-05-10 The Goodyear Tire & Rubber Company Yarn feeding system for high speed knitter
US11021016B2 (en) 2017-04-17 2021-06-01 Bridgestone Americas Tire Operations, Llc Braided tire material

Also Published As

Publication number Publication date
GB2250934A (en) 1992-06-24
GB9124884D0 (en) 1992-01-15
GB9025923D0 (en) 1991-01-09

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