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WO1998004399A1 - Tube integral - Google Patents

Tube integral Download PDF

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Publication number
WO1998004399A1
WO1998004399A1 PCT/GB1997/001298 GB9701298W WO9804399A1 WO 1998004399 A1 WO1998004399 A1 WO 1998004399A1 GB 9701298 W GB9701298 W GB 9701298W WO 9804399 A1 WO9804399 A1 WO 9804399A1
Authority
WO
WIPO (PCT)
Prior art keywords
strands
tube
angle
plastics material
integral
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/GB1997/001298
Other languages
English (en)
Inventor
Nigel Edwin Wrigley
Norman James Stancliffe
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.)
Netlon Ltd
Original Assignee
Netlon Ltd
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 Netlon Ltd filed Critical Netlon Ltd
Priority to AU27829/97A priority Critical patent/AU2782997A/en
Publication of WO1998004399A1 publication Critical patent/WO1998004399A1/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
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D28/00—Producing nets or the like, e.g. meshes, lattices
    • 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
    • B29C48/05—Filamentary, e.g. strands
    • 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
    • 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
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • 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
    • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated 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
    • B29C48/131—Curved articles
    • 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
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2028/00—Nets or the like

Definitions

  • Extruded, polymeric diamond integral net tubes manufactured using the process of GB 836 555. GB 928 954. or other extruded net processes, and also woven, braided tubes, are used as protective sleeves for a wide range of components and applications, because of their ability to be expanded and contracted over a range of diameters Similar rubes can be used for collation, to hold a number of components together
  • the components can be for instance electric cables or tubes or hoses
  • the "protection "" may be to protect the components inside the sleeve or to protect external components, materials or persons from the components inside the sleeve
  • extruded, integral tubes can be manufactured on relatively simple machinery, but are limited in the range of diameters over which a single tube can be applied, typically 2.5.1 or less.
  • the woven braided tubes can have a wide range of diameter change, with greater flexibility, but need complex, small diameter, circular weaving machines for their manufacture
  • a "swivel joint" was used in a N ' etlon Limited hat moulding net in the 1960's to provide ease of moulding hat forms and heat-setting to shape, so that the strands could swivel easily during moulding, but then retain shape after heat-setting. After yielding in one direction during the moulding operation, the jomt was then heat-set at its new angle.
  • the present invention provides methods as set forth in Claims 1 or 3, integral tubes as set forth in Claims 4, 5 or 7, and the tube in use, positioned around one or more components to protect and or collate the component(s).
  • the invention provides rotational integral hinges as swivel joints beuveen the strands of one set and the strands of the other set. WTien initially changing the angle, the material that is oriented may originate in the strand, and it is possible that both the for instance infinitesimally thin layers forming the original interconnection between the strands and the adjacent material from the strands orient to form a joint in the finished product.
  • the mechanism will depend on the form of the interconnection between the strands in the as-cast material.
  • the inner and outer strands act like two helical springs: they can be expanded until their turns are in contact almost along the whole of their lengths, and their resilience can provide some clamping as the strands tend to return to their as-cast configuration.
  • the as-cast material (for instance the material after extrusion and passing over the sizing mandrel, if used) should exhibit some bi-planarity, but it is not required that there should be no or substantially no overlap between the inner and outer -, - * > strands as it may be possible to make the product even if there is a large overlap of strand cross-sections.
  • the product can be made from as-cast materials which are beyond bi-planar, for instance by extruding the inner strands into spiral grooves in a rotating sizing mandrel which are deeper than the inner strands, so that the sizing mandrel causes the outer strands to be pulled away somewhat from the inner strands; in any case, some separation can be obtained with normal extrusion techniques, eg a separation of not less than about 1 :30, or of not more than about 1 : 10, preferably about 1 :20, as a ratio of the thickness of the tube wall.
  • the sections of extruded strands vary somewhat along the lengths of the strands and only approximate to geometrical shapes.
  • the strands preferably are of generally rectangular shape, taller than they are wide (though they may be considerably canted over), with a height to width ratio eg not less than about 1.3: 1 or 1.4: 1 and eg not greater than about 1.8: 1 or 2: 1.
  • the strand sections could alternatively be of a special profile, eg as in GB 1 210 354.
  • the temperature at which the oriented joints are formed can be any temperature at which the plastics material is sufficiently solid for the joints to be mechanically swivelled; the relationship of the joint-pivoting modulus to the strand-bending modulus is not very temperature dependent, and the lower limit is determined by the particular products and polymer.
  • the temperature could be room temperature and die orientation could be effected immediately before or during braiding or collating.
  • the oriented swivel joint is formed, it is preferably not subsequently heat set, ie it is preferably not heated above a temperature at which it de-orients (heat setting an oriented plastics material requires constraining the plastics material to prevent any shrink back, heating to a temperature significantly above the orientation temperature, and cooling). Nonetheless, the rube could be heat set if desired, for instance in its fully-extended configuration.
  • the plastics material can be any suitable molecularly orientable material, preferred materials being polyamides, polyesters and polyolefms. Al ⁇ ough said angle need be changed in only one direction, it is preferably changed in one direction relative to ⁇ e as-extruded configuration and is ⁇ en changed in ⁇ e opposite direction. The amount by which ⁇ e angle need be changed will vary according to ⁇ e plastics material, ⁇ e temperature and ⁇ e rate of change.
  • ⁇ e angle change is preferably greater ⁇ an about 15°, about 20°, about 30°, about 40°, or about 50°; ⁇ e angle change is ⁇ e total angle through which ⁇ e angle is changed, as measured from one extreme position to ⁇ e opposite extreme position (one of which extreme positions would be ⁇ e starting position if ⁇ e angle is changed in one direction only).
  • the net formed by ⁇ e sets of strands is a diamond net in which each set of strands makes approximately the same (but opposite) angle with ⁇ e machine direction .
  • diis is not essential, and ⁇ e angles can be different or one set of strands can extend in ⁇ e longitudinal direction.
  • Figure 1 is a plan view of an as-cast tube for forming a braided tube in accordance with ⁇ e invention
  • Figure 2 is a plan view of ⁇ e tube of Figure 1 extended to its maximum length
  • Figure 3 is a plan view of ⁇ e rube of Figure 1 compressed to its minimum length
  • Figure 4 is a schematic isometric view of a typical interconnection beuveen two strands in an as-cast tube
  • Figure 5 is a schematic elevation of ⁇ e interconnection of Figure 4.
  • Figure 6 is an elevation showing the oriented joint after swivelling ⁇ e interconnection of Figure 4;
  • Figure 7 is a partly schematic plan view of a typical interconnection between two strands in a second as-cast tube,
  • Figures 8 and 9 are vertical sections along ⁇ e planes VIII-VIII and IX-IX in Figure 7
  • Figure 10 is an isomet ⁇ c view of ⁇ e interconnection of Figure 7 but taken from a photograph of an actual interconnection
  • Figures 1 1 and 12 co ⁇ espond to Figures 8 and 9, but show ⁇ e o ⁇ ented jomt after swivelling the interconnection
  • Figure 13 is an isomet ⁇ c view of the o ⁇ ented jomt of Figures 1 1 and 12 but taken from a photograph of an actual joint,
  • Figure 14 is a schematic elev ation of a fust production machine.
  • Figure 15 is a schematic elevation, showing a va ⁇ ation of Figure 14
  • Figure 16 is a schematic elevation of another production mactune.
  • Figures 17 and 18 illustrate Uvo uses of ⁇ e braided tube of ⁇ e invention
  • Figures 1 to 3 illustrate the invention as applied to a tubular diamond form integral net
  • An integral diamond net tube 1 as cast by ⁇ e extrusion process is shown in Figure 1 It consists of two sets of strands running in opposite helical directions, outer strands 2 and inner strands 3 If, at each crossing pomt of the inner and outer strands 2, 3, there is formed between the strands 2. 3 an integral rotational lunge jomt, ⁇ e tube shown in Figure 1 can be readily expanded in length to ⁇ e form shown in Figure 2. at which point its turns are in contact and it has its minimum diameter, or contracted in length to ⁇ e form shown in Figure 3. at which point its turns are again in contact and it has its maximum diameter
  • Figure 4 shows ⁇ e strands 2, 3 connected at an interconnection 4 in ⁇ e as-cast form
  • the machine direction is indicated as MD, and ⁇ is the strand angle. If ⁇ e strands 2, 3 are rotated m the direction of the arrows A or B, ⁇ e interconnection 4 is subjected to rotational shear. If ⁇ e rotational shear yield moment of ⁇ e intersection 4 is less than the bending yield moment for the strands 2, 3, forces applied in directions of arrows A or B will cause ⁇ e intersection 4 to yield in rotational shear before the strands 2, 3 yield in bending.
  • ⁇ e intersection 4 is yielded first in one direction then optionally in the other, ⁇ e intersection becomes oriented into an integral rotational hinge joint 5 as shown in Figure 6, forming a tubular net or braided tube 6 in accordance wi ⁇ ⁇ e invention.
  • the strand 2 is of generally rectangular section and has a heightwidth ratio of about 1.6: 1 but is somewhat canted over; ⁇ e strand 3 is of similar section wi ⁇ a height: width ratio of about 1.5: 1 but is very canted over. In this canted situation, height is measured in directions h and width is measured in directions w. In this case, there was some tearing of ⁇ e material in ⁇ e area 7 ( Figures 1 1 and 13) during ⁇ e orientation of ⁇ e hinge joint 5. After formation of ⁇ e integral hinge joint 5. ⁇ e strands 2 and 3 are substantially further apart. In ⁇ e as-cast net 1 of Figures 7 to 10. ⁇ e distance apart of ⁇ e strands 2 and 3 was about 1/20 of ⁇ e net thickness; in the braided tube 6 of Figures 1 1 to 13, the distance apart was about 1 '8 of the net thickness.
  • Suitable equipment for manufacturing braided tubes 6 according to this invention is illustrated in Figure 14.
  • the equipment comprises a suitable diehead 8 for manufacturing an integral bi-planar diamond net in accordance wi ⁇ GB 836 555 or GB 928 954.
  • a sizing mandrel 9 over which ⁇ e diamond net ( 1 ) is cast, and spray nozzles or water jets 10 to cool and solidify ⁇ e diamond net ( 1 ).
  • the sizing mandrel 9 is fastened to the diehead 8. Downstream of ⁇ e sizing mandrel 9 an expanding mandrel 1 1 is fastened to ⁇ e sizing mandrel 9 by a towing wire or rod 12.
  • a caterpillar haul-off 13 pulls ⁇ e diamond net ( 1 ) over ⁇ e sizing mandrel 9 and along a smaller diameter portion of the expanding mandrel 1 1 and ⁇ en pushes ⁇ e diamond net on to a larger diameter portion of ⁇ e expanding mandrel 1 1.
  • the smaller diameter portion of ⁇ e expanding mandrel 1 1 may be of a similar diameter to ⁇ e sizing mandrel 9 or it may be significantly smaller than ⁇ e sizing mandrel 9.
  • ⁇ e tension generated in ⁇ e diamond net by ⁇ e caterpillar haul-off 13 to pull ⁇ e diamond net off ⁇ e sizing mandrel 9 may cause rotation of the interconnections 4 in ⁇ e diamond net 1 from ⁇ e form of Figure 1 towards ⁇ e form of Figure 2.
  • the diamond net (6) is ⁇ en pulled off the expanding mandrel 1 1 by equipment 14 which may be a haul-off nip or a wind-up mechanism.
  • the tension generated to pull ⁇ e net off the expanding mandrel 1 1 will cause rotation of the joints within ⁇ e net 6 towards ⁇ e form of Figure 2.
  • a free- floating expanding mandrel 15 as illustrated in Figure 15 may be employed. This free- floating mandrel 15 is trapped between haul-off rollers 16 and a stop mechanism 17 which is formed by a stationary guide or by stationary rollers.
  • the caterpillar haul-off 13 as shown in Figure 14 and ⁇ e driven haul-off rollers 16 shown in Figure 15 are interchangeable.
  • Figure 16 shows an arrangement in which ⁇ e machine direction is vertical, and in which, in place of ⁇ e expanding mandrel 1 1 or 15 of Figures 14 and 15. a smooth expanding ball 18 is used, trapped between haul-off rollers 16 and a stop mechanism 19 which may be a stationary ring.
  • the net (1 ) is extruded into a water tank 20 and is turned around a roller 21 by ⁇ e haul-off rollers 16.
  • a protective sleeve was formed as set out below.
  • the equipment was as in Figure 16 .
  • Strand (filament) cross-sectional shape generally rectangular wi ⁇ radiussed comers, as in Figures 8 and 9.
  • Outer strand maximum cross-section dimension 0.83 mm.
  • Outer strand minimum cross-section dimension 0.59 mm.
  • Inner strand maximum cross-section dimension 1.00 mm.
  • Inner strand minimum cross-section dimension 0.57 mm
  • Expanding ball diameter 40 mm
  • a braided tube 6 of the invention is shown protecting a cable 22 in Figure 17 and collating three cables 23 in Figure 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)

Abstract

Pour fabriquer un tube intégral en matière plastique ayant un large éventail de diamètres et permettant de protéger ou d'assembler efficacement des câbles, un tube bi-planaire à mailles en forme de losange (1) est extrudé et l'angle formé par un ensemble de mèches (2) et un autre ensemble de fils de base (3) est modifié de sorte que les parties situées aux points de jonction des fils de base (2, 3) pivotent l'une par rapport à l'autre et permettent l'orientation moléculaire de la matière plastique aux points de jonction de sorte que des joints orientés soient formés, ce qui permet de modifier rapidement les angles entre les ensembles de fils (2, 3).
PCT/GB1997/001298 1996-07-30 1997-05-12 Tube integral Ceased WO1998004399A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU27829/97A AU2782997A (en) 1996-07-30 1997-05-12 Integral tube

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9615934.8 1996-07-30
GBGB9615934.8A GB9615934D0 (en) 1996-07-30 1996-07-30 Integral tube

Publications (1)

Publication Number Publication Date
WO1998004399A1 true WO1998004399A1 (fr) 1998-02-05

Family

ID=10797704

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/001298 Ceased WO1998004399A1 (fr) 1996-07-30 1997-05-12 Tube integral

Country Status (3)

Country Link
AU (1) AU2782997A (fr)
GB (2) GB9615934D0 (fr)
WO (1) WO1998004399A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008035629A1 (fr) 2006-09-19 2008-03-27 Daiichi Sankyo Company, Limited Dérivé de pyrazolopyrimidine
JP2020147048A (ja) * 2015-05-27 2020-09-17 東京インキ株式会社 網目状樹脂成形品、構造体および上記網目状樹脂成形品の使用方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4172524A1 (fr) 2020-06-24 2023-05-03 Winston Products LLC Tuyau extensible

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3222440A (en) * 1962-07-30 1965-12-07 Union Carbide Corp Process and apparatus for the production of oriented plastic net
US4075379A (en) * 1974-06-19 1978-02-21 Smith & Nephew Plastics Limited Melt-embossed polymer film
DE2911348B1 (de) * 1979-03-22 1980-07-31 Pest Megyei Mueanyagipari Verfahren zum Herstellen von rundgewebten Schlaeuchen
JPS5926223A (ja) * 1982-08-04 1984-02-10 Sumitomo Bakelite Co Ltd フレキシブル網状管の製造方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1535772A (en) * 1975-06-12 1978-12-13 Netlon Ltd Extruded plastic mash
NO143805C (no) * 1976-01-29 1981-04-15 Conwed Corp Fremgangsmaate for fremstilling av plastnett med hoeyt traadtall
CA1120226A (fr) * 1978-10-04 1982-03-23 Du Pont Canada Inc. Procede et appareil de fabrication de filet de plastique plat

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3222440A (en) * 1962-07-30 1965-12-07 Union Carbide Corp Process and apparatus for the production of oriented plastic net
US4075379A (en) * 1974-06-19 1978-02-21 Smith & Nephew Plastics Limited Melt-embossed polymer film
DE2911348B1 (de) * 1979-03-22 1980-07-31 Pest Megyei Mueanyagipari Verfahren zum Herstellen von rundgewebten Schlaeuchen
JPS5926223A (ja) * 1982-08-04 1984-02-10 Sumitomo Bakelite Co Ltd フレキシブル網状管の製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 120 (M - 300) 6 June 1984 (1984-06-06) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008035629A1 (fr) 2006-09-19 2008-03-27 Daiichi Sankyo Company, Limited Dérivé de pyrazolopyrimidine
JP2020147048A (ja) * 2015-05-27 2020-09-17 東京インキ株式会社 網目状樹脂成形品、構造体および上記網目状樹脂成形品の使用方法

Also Published As

Publication number Publication date
GB2315702A (en) 1998-02-11
GB9615934D0 (en) 1996-09-11
AU2782997A (en) 1998-02-20
GB9709643D0 (en) 1997-07-02

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