GB1120045A - Manufacture of plastics tubing - Google Patents

Manufacture of plastics tubing

Info

Publication number
GB1120045A
GB1120045A GB14273/66A GB1427366A GB1120045A GB 1120045 A GB1120045 A GB 1120045A GB 14273/66 A GB14273/66 A GB 14273/66A GB 1427366 A GB1427366 A GB 1427366A GB 1120045 A GB1120045 A GB 1120045A
Authority
GB
United Kingdom
Prior art keywords
mandrel
tube
air
nozzle
composite
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.)
Expired
Application number
GB14273/66A
Inventor
Anthony David Downing
Keith Russell
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB14273/66A priority Critical patent/GB1120045A/en
Priority to NL6704525A priority patent/NL6704525A/xx
Publication of GB1120045A publication Critical patent/GB1120045A/en
Expired 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0013—Extrusion moulding in several steps, i.e. components merging outside the die
    • B29C48/0015—Extrusion moulding in several steps, i.e. components merging outside the die producing hollow articles having components brought in contact outside the extrusion die
    • B29C48/0016—Extrusion moulding in several steps, i.e. components merging outside the die producing hollow articles having components brought in contact outside the extrusion die using a plurality of extrusion dies
    • 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

Landscapes

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

Abstract

1,120,045. Extruding composite tubing. IMPERIAL CHEMICAL INDUSTRIES Ltd. 22 March, 1967 [31 March, 1966], No. 14273/66. Heading B5A. [Also in Division F2] A composite tube is made by extruding a first tube from nozzle 14, cooling it internally by air from chamber 18 and externally by air from a ring 19, hauling the tube along mandrel 1 to a second extrusion nozzle 23 where a second tube is deposited on the first, contact being ensured by applying a vacuum to chamber 26, and cooling the composite tube by means of a second air ring 27 adjacent the downstream end of mandrel 1. Mandrel 1 has an external diameter adjacent and downstream of nozzle 14 somewhat greater than the required internal diameter of the composite tubing, a portion (4), Fig. 2 (not shown), which does not contact the tubing apart possibly from one or more localized portions (5) which have substantially the same diameter as that of the composite tube, and a downstream portion (3) which lies adjacent and downstream of nozzle 23 and which is of the required internal diameter of the composite tubing. Portion (5) has axial grooves and portion (3) a helical groove (7) for the passage of air. The mandrel which may have a matt surface, e.g. a sand-blasted surface, to reduce frictional effects, is coo'ed internally by water flowing in at conduit (9) and out at conduit (10) and is provided with a support-air conduit (11). Preferably the first tube is surface-oxidized before reaching nozzle 23 by corona-discharge, flame or hot air treatment or subjection to a reactive gas such as ozone or chlorine. As shown, a high potential electrode 21 surrounds mandrel 1 adjacent a portion (5) thereof which forms the second electrode and the mandrel is earthed as at 22. The composite tube may comprise plastics materials of the same constitution but differing in physical properties, e.g. polyethylene of different melt index, and/or content of additives, e.g. pigments, stabilizers, antistatic agents, but preferably the plastics materials are different, e.g. polyethylene coated with nylon. Specific further combination materials mentioned are polypropylene, poly - 4 - methyl - pentene - 1, P.V.C., vinylidene chloride polymers and copolymers, copolymers of ethylene with, e.g. vinyl esters or acrylates. Further nozzles may be employed along the mandrel to increase the number of layers.
GB14273/66A 1966-03-31 1966-03-31 Manufacture of plastics tubing Expired GB1120045A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB14273/66A GB1120045A (en) 1966-03-31 1966-03-31 Manufacture of plastics tubing
NL6704525A NL6704525A (en) 1966-03-31 1967-03-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB14273/66A GB1120045A (en) 1966-03-31 1966-03-31 Manufacture of plastics tubing

Publications (1)

Publication Number Publication Date
GB1120045A true GB1120045A (en) 1968-07-17

Family

ID=10038183

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14273/66A Expired GB1120045A (en) 1966-03-31 1966-03-31 Manufacture of plastics tubing

Country Status (2)

Country Link
GB (1) GB1120045A (en)
NL (1) NL6704525A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2204376A (en) * 1987-05-08 1988-11-09 Caprano & Brunnhofer Motor vehicle pipeline
FR2656039A1 (en) * 1989-12-20 1991-06-21 Fist Spa FLEXIBLE CONDUIT FOR ENGINE REFRIGERATION CIRCUITS FOR MOTOR VEHICLES.
WO2017186883A1 (en) * 2016-04-27 2017-11-02 Caiola Filiere S.R.L. Sealing module for cables or pipes as well as method and apparatus for providing the same
GB2593559A (en) * 2019-09-02 2021-09-29 Ro Lee Kyung Device for forming a protective pipe having integrated inner and outer pipes, and protective pipe formed thereby

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2204376A (en) * 1987-05-08 1988-11-09 Caprano & Brunnhofer Motor vehicle pipeline
GB2204376B (en) * 1987-05-08 1991-03-20 Caprano & Brunnhofer Motor vehicle pipeline
FR2656039A1 (en) * 1989-12-20 1991-06-21 Fist Spa FLEXIBLE CONDUIT FOR ENGINE REFRIGERATION CIRCUITS FOR MOTOR VEHICLES.
GB2239302A (en) * 1989-12-20 1991-06-26 F I S T S P A Flexible two-layered plastics conduit
WO2017186883A1 (en) * 2016-04-27 2017-11-02 Caiola Filiere S.R.L. Sealing module for cables or pipes as well as method and apparatus for providing the same
EP3448651B1 (en) 2016-04-27 2020-10-21 Caiola Filiere S.r.l. Sealing module for cables or pipes as well as method and apparatus for providing the same
US11213990B2 (en) 2016-04-27 2022-01-04 Caiola Filiere S.R.L. Sealing module for cables or pipes as well as method and apparatus for providing the same
GB2593559A (en) * 2019-09-02 2021-09-29 Ro Lee Kyung Device for forming a protective pipe having integrated inner and outer pipes, and protective pipe formed thereby
GB2593559B (en) * 2019-09-02 2022-04-13 Ro Lee Kyung Apparatus for forming a protecting duct with integrated inner and outer walls, and the duct formed thereby

Also Published As

Publication number Publication date
NL6704525A (en) 1967-06-26

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