GB1427260A - Method of sheathing articles - Google Patents

Method of sheathing articles

Info

Publication number
GB1427260A
GB1427260A GB2774673A GB2774673A GB1427260A GB 1427260 A GB1427260 A GB 1427260A GB 2774673 A GB2774673 A GB 2774673A GB 2774673 A GB2774673 A GB 2774673A GB 1427260 A GB1427260 A GB 1427260A
Authority
GB
United Kingdom
Prior art keywords
pipe
extruded
coating
bitumen
polyethylene
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
GB2774673A
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Priority to GB2774673A priority Critical patent/GB1427260A/en
Publication of GB1427260A publication Critical patent/GB1427260A/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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/48—Preparation of the 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
    • B29C48/15—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
    • 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)
  • Manufacturing & Machinery (AREA)
  • Laminated Bodies (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

1427260 Extruded pipe coating MANNESMANN AG 11 June 1973 27746/73 Heading B5A [Also in Division F2] A steel pipe having its internal wall coated with bitumen, e.g. of 1 to 2 mm. thickness, is provided with an anti-corrosion exterior extruded tubular sheath of polyethylene or polyvinyl chloride, adhered by an extruded coating of ethylene copolymer, e.g. acryl-ethylene polymer, in the interior of the sheath, and a priming on the pipe exterior comprising a stoichiometric mixture of bisphenol/polyamino amide epoxy resin. Immediately prior to, or after, coating with the bitumen and epoxy, the pipe is heated to 70‹ to 90‹ C., e.g. 80‹ C., preferably by induction, and passed through an extruder die from which the polyethylene and co-polymer are extruded as outer and inner layers of a tube, which is drawn on to the pipe by the greater speed of advance of the pipe through the die. The sheathed pipe is cooled to room temperature during not more than three minutes. The epoxy resin coating comprises 50 g./m.<SP>2</SP> of pipe surface, and is of a thickness of at most 0À1 mm., and preferably less than the average roughness depth of the pipe surface.
GB2774673A 1973-06-11 1973-06-11 Method of sheathing articles Expired GB1427260A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2774673A GB1427260A (en) 1973-06-11 1973-06-11 Method of sheathing articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2774673A GB1427260A (en) 1973-06-11 1973-06-11 Method of sheathing articles

Publications (1)

Publication Number Publication Date
GB1427260A true GB1427260A (en) 1976-03-10

Family

ID=10264600

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2774673A Expired GB1427260A (en) 1973-06-11 1973-06-11 Method of sheathing articles

Country Status (1)

Country Link
GB (1) GB1427260A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2944809A1 (en) * 1978-11-06 1980-05-14 Kendall & Co COATED ITEM AND METHOD FOR APPLYING A PROTECTIVE LAYER TO ITEMS, IN PARTICULAR METAL PIPES
US6224710B1 (en) 1994-03-11 2001-05-01 James Rinde Method of applying protective covering to a substrate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2944809A1 (en) * 1978-11-06 1980-05-14 Kendall & Co COATED ITEM AND METHOD FOR APPLYING A PROTECTIVE LAYER TO ITEMS, IN PARTICULAR METAL PIPES
US6224710B1 (en) 1994-03-11 2001-05-01 James Rinde Method of applying protective covering to a substrate
US6294597B1 (en) * 1994-03-11 2001-09-25 James Rinde Curable polymeric composition and use in protecting a substrate

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee