GB2036034A - Method for vulcanizing an insulating layer of an electrical cable - Google Patents

Method for vulcanizing an insulating layer of an electrical cable

Info

Publication number
GB2036034A
GB2036034A GB8002272A GB8002272A GB2036034A GB 2036034 A GB2036034 A GB 2036034A GB 8002272 A GB8002272 A GB 8002272A GB 8002272 A GB8002272 A GB 8002272A GB 2036034 A GB2036034 A GB 2036034A
Authority
GB
United Kingdom
Prior art keywords
insulating layer
vulcanizing
layer
transferred
electrical
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.)
Granted
Application number
GB8002272A
Other versions
GB2036034B (en
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB2036034A publication Critical patent/GB2036034A/en
Application granted granted Critical
Publication of GB2036034B publication Critical patent/GB2036034B/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
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
    • 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
    • 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/91—Heating, e.g. for cross linking
    • 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

Abstract

A method for vulcanizing an insulating layer of an electrical cable. In a continuous process for manufacturing an electrical cable, which comprises an electrically conductive non-metallic layer extruded outside and preferably simultaneously with an electrically insulating layer, a method of vulcanizing the insulating layer comprises passing the cable (3) through a gas-filled pressure chamber (1) in which it is supplied with heat for vulcanizing the insulating layer, the heat being supplied completely or partly in the form of heat due to electrical resistance heating generated by electrical energy transferred to the conductive layer. In one example, the electrical energy is transferred to the conductive layer by means of at least one electrode (2, 4, 5 or 7 to 10) making contact against the layer. Alternatively, the electrical energy could be transferred in a capacitive way, or magnetically by generating eddy currents in the conductive layer.
GB8002272A 1977-12-30 1978-12-21 Method for vulcanizing an insulating layer of an electrical cable Expired GB2036034B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7714979A SE417655B (en) 1977-12-30 1977-12-30 PROCEDURE FOR VOLCANIZATION OF THE ISOLAR LAYER ON AN ELECTRIC CABLE

Publications (2)

Publication Number Publication Date
GB2036034A true GB2036034A (en) 1980-06-25
GB2036034B GB2036034B (en) 1982-09-15

Family

ID=20333365

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8002272A Expired GB2036034B (en) 1977-12-30 1978-12-21 Method for vulcanizing an insulating layer of an electrical cable

Country Status (8)

Country Link
JP (1) JPS55500029A (en)
DK (1) DK144609C (en)
FI (1) FI65340C (en)
GB (1) GB2036034B (en)
NL (1) NL7812591A (en)
NO (1) NO149122C (en)
SE (1) SE417655B (en)
WO (1) WO1979000463A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3227799C2 (en) * 1982-07-24 1989-02-23 Maschinenbau Scholz Gmbh & Co Kg, 4420 Coesfeld Device for dry crosslinking of electrical cables or lines

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR49033E (en) * 1935-07-15 1938-10-14
US3479419A (en) * 1965-05-03 1969-11-18 Irving Hochhauser Process and apparatus for curing material by induction heating
US3393257A (en) * 1965-10-08 1968-07-16 Cabot Corp Novel polymeric curing process
GB1372587A (en) * 1971-06-21 1974-10-30 British Insulated Callenders Manufacture of insulated electric cables

Also Published As

Publication number Publication date
NL7812591A (en) 1979-07-03
NO784439L (en) 1979-07-03
WO1979000463A1 (en) 1979-07-26
FI65340B (en) 1983-12-30
FI783994A (en) 1979-07-01
DK332179A (en) 1979-08-08
DK144609C (en) 1982-09-20
JPS55500029A (en) 1980-01-24
SE417655B (en) 1981-03-30
NO149122B (en) 1983-11-07
FI65340C (en) 1984-04-10
DK144609B (en) 1982-04-13
NO149122C (en) 1984-02-15
SE7714979L (en) 1979-07-01
GB2036034B (en) 1982-09-15

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee