GB1480632A - Process and apparatus for producing electric cable insulated with cured polyolefin - Google Patents

Process and apparatus for producing electric cable insulated with cured polyolefin

Info

Publication number
GB1480632A
GB1480632A GB36918/74A GB3691874A GB1480632A GB 1480632 A GB1480632 A GB 1480632A GB 36918/74 A GB36918/74 A GB 36918/74A GB 3691874 A GB3691874 A GB 3691874A GB 1480632 A GB1480632 A GB 1480632A
Authority
GB
United Kingdom
Prior art keywords
die
inlet
lubricant
polyolefin
length
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
GB36918/74A
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.)
Dainichi Nippon Cables Ltd
Mitsubishi Petrochemical Co Ltd
Original Assignee
Dainichi Nippon Cables Ltd
Mitsubishi Petrochemical Co 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 Dainichi Nippon Cables Ltd, Mitsubishi Petrochemical Co Ltd filed Critical Dainichi Nippon Cables Ltd
Publication of GB1480632A publication Critical patent/GB1480632A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H01B13/145—Pretreatment or after-treatment
    • 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
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • 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
    • B29C48/06—Rod-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/10—Thermosetting resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2301/00—Use of unspecified macromolecular compounds as reinforcement
    • B29K2301/10—Thermosetting resins

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Organic Insulating Materials (AREA)

Abstract

1480632 Extrudate lubrication DAINICHI NIHON DENSEN KK and MITSUBISHI PETROCHEMICAL CO Ltd 22 Aug 1974 [22 Aug 1973] 36918/74 Heading B5A [Also in Division H1] An electric cable conductor 11 is sheathed with an extruded cross-linked polyolefin during passage through the constant section circular outlet bore of a heated extrusion die 3a, which effects curing of the polyolefin, and degradation of the polyolefin in the outlet bore is prevented by a lubricant continuously introduced along a tapering inlet 3c to the outlet bore, to the surface 3c of which lubricant is continuously supplied at a location upstream of the downstream end of the tapering inlet 3c. The lubricant may be supplied to the inlet 3c through a porous sintered metal surface, or through an annular slit 8, e.g. of 0À005 to 1 mm. thickness, which is located between 10 mm. downstream of the upstream end of inlet 3c, and 2 mm. upstream of its downstream end. The slit 8 is defined between die members 3a, 3b, clamped together by a member 4, at a seal 5. The inlet 3c is of 50 to 200 mm. length and the circular bore of die 3a is of 1 to 50 m. length, and preferably 5 to 30 m. length, and may be defined by a plurality of assembled shorter die pieces. The die 3a is heated electrically, or by a hot oil jacket, e.g. to 200‹ to 300‹ C., and the cured sheathing issues from the die directly into a pressurized water cooling device (not shown). Various polyolefins and curing agents are specified, and the lubricants are of specified properties and may be these described in Specification 1,380,942. The example relates to the simultaneous extrusion of an insulating sheathing of polyethylene, between inner and outer semiconducting layers of ethylene-vinyl acetate copolymer containing carbon black.
GB36918/74A 1973-08-22 1974-08-22 Process and apparatus for producing electric cable insulated with cured polyolefin Expired GB1480632A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48094059A JPS5834883B2 (en) 1973-08-22 1973-08-22 The best way to get started

Publications (1)

Publication Number Publication Date
GB1480632A true GB1480632A (en) 1977-07-20

Family

ID=14099952

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36918/74A Expired GB1480632A (en) 1973-08-22 1974-08-22 Process and apparatus for producing electric cable insulated with cured polyolefin

Country Status (5)

Country Link
JP (1) JPS5834883B2 (en)
DE (1) DE2439492C3 (en)
FR (1) FR2241855B1 (en)
GB (1) GB1480632A (en)
SU (1) SU1007561A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4591323A (en) * 1983-09-23 1986-05-27 A/S Sonnichsen Rorvalseverket Extruder and calibrating apparatus for making ribbed or grooved pipe

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU571663B2 (en) * 1984-04-05 1988-04-21 Fmc Corporation Latchable platform attachment to crane boom
DE3933028C2 (en) * 1989-09-29 1998-01-22 Siemens Ag Crosshead for the production of cable insulation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4591323A (en) * 1983-09-23 1986-05-27 A/S Sonnichsen Rorvalseverket Extruder and calibrating apparatus for making ribbed or grooved pipe

Also Published As

Publication number Publication date
JPS5043485A (en) 1975-04-19
DE2439492C3 (en) 1978-05-24
FR2241855B1 (en) 1980-10-31
JPS5834883B2 (en) 1983-07-29
DE2439492B2 (en) 1977-09-29
DE2439492A1 (en) 1975-03-06
FR2241855A1 (en) 1975-03-21
SU1007561A3 (en) 1983-03-23

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19940821