EP0048426B1 - Procédé de fabrication d'une préforme pour câble électrique à isolant minéral comprimé - Google Patents

Procédé de fabrication d'une préforme pour câble électrique à isolant minéral comprimé Download PDF

Info

Publication number
EP0048426B1
EP0048426B1 EP81107248A EP81107248A EP0048426B1 EP 0048426 B1 EP0048426 B1 EP 0048426B1 EP 81107248 A EP81107248 A EP 81107248A EP 81107248 A EP81107248 A EP 81107248A EP 0048426 B1 EP0048426 B1 EP 0048426B1
Authority
EP
European Patent Office
Prior art keywords
preform
organic binder
electrically insulating
mineral
manufacturing
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
EP81107248A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0048426A1 (fr
Inventor
Jean-Claude Bourget
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.)
Cables de Lyon SA
Original Assignee
Cables de Lyon SA
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 Cables de Lyon SA filed Critical Cables de Lyon SA
Publication of EP0048426A1 publication Critical patent/EP0048426A1/fr
Application granted granted Critical
Publication of EP0048426B1 publication Critical patent/EP0048426B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • 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
    • H01B13/004—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing rigid-tube cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53478—Means to assemble or disassemble with magazine supply
    • Y10T29/53487—Assembling means comprising hand-manipulatable implement
    • Y10T29/53513—Means to fasten by deforming

Definitions

  • the present invention relates to a method of manufacturing a preform made of electrical insulating material for an electrically insulated mineral cable.
  • These preforms are cylindrical, and provided with one or more longitudinal channels for the introduction of the conductors.
  • Preforms of this kind have so far been manufactured by tableting under high pressure.
  • the insulating mineral material In the tableting under high pressure, the insulating mineral material, previously moistened, is introduced into a matrix which is subjected to high pressure. Preforms are obtained comprising passage channels for the conductors which are very well centered, but in very short lengths (elements of the order of cm). This discontinuous process makes it possible to obtain productions only from 2 to 16 m / hour approximately. These elements are then introduced one after the other into the tube intended to form the sheath, which is a relatively long operation.
  • the other method of filling the tubes consists of introducing the mineral insulating material in powder form into the metal tube arranged vertically and provided with its conductor (s), while compacting it. This process does not ensure good centering of the conductors, and gives a lower compactness than the previous one, especially during the first stretching of cable formation. It only allows for relatively short cable lengths.
  • the object of the present invention is to remedy the drawbacks of one and the other of the known methods, and to allow the production of preforms in a partially continuous manner, with a time of threading in the tubes significantly reduced compared to the method of pastillage under high pressure, with productions up to 250 m / hour. It also aims to allow excellent centering of the conductor accommodation channels.
  • the magnesia is purified by elimination of its impurities, in particular by magnetic means.
  • the magnesia is added with an organic glue introduced in 3.
  • the mixture is then introduced into the screw extruder shown diagrammatically in 4, comprising a feed screw 5 and a perpendicular compression 6 to produce a cylindrical structure provided with at least one internal channel.
  • the formed cylinder with a specific mass of about 2.4 g / cm 3 , is cut by a guillotine 7, the size of the cooking supports.
  • the preforms obtained are placed on these supports at 8, pass through an oven 9 where they are heated to 250 ° C.
  • the supports with their preforms are loaded into wagons and introduced into the rotary hearth or continuous passage furnace 10 with gradual rise in temperature, where the preforms are baked in air at a temperature in the region of 1300 ° C.
  • the preforms are introduced into an oven 11, where they are cooled to 200 ° C.
  • the preforms are then introduced hot 12 into the tubes intended to serve as a sheath, guiding them by pins.
  • the tubes are then sent to the wire drawing for the manufacture of the cables, in the known manner.
  • the cooking temperature must be adapted to the nature of the mineral insulating material. If necessary, other mineral insulators may be used than those which have been mentioned above.
  • the invention is particularly applicable to the manufacture of heating elements or thermocouples, as well as all electrical cables intended to be placed in an environment at high temperature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Resistance Heating (AREA)
  • Insulated Conductors (AREA)
  • Inorganic Insulating Materials (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
EP81107248A 1980-09-23 1981-09-15 Procédé de fabrication d'une préforme pour câble électrique à isolant minéral comprimé Expired EP0048426B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8020393 1980-09-23
FR8020393A FR2490866A1 (fr) 1980-09-23 1980-09-23 Procede de fabrication d'une preforme pour cable electrique a isolant mineral comprime

Publications (2)

Publication Number Publication Date
EP0048426A1 EP0048426A1 (fr) 1982-03-31
EP0048426B1 true EP0048426B1 (fr) 1985-01-09

Family

ID=9246205

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81107248A Expired EP0048426B1 (fr) 1980-09-23 1981-09-15 Procédé de fabrication d'une préforme pour câble électrique à isolant minéral comprimé

Country Status (7)

Country Link
US (1) US4420881A (enrdf_load_stackoverflow)
EP (1) EP0048426B1 (enrdf_load_stackoverflow)
JP (1) JPS5787015A (enrdf_load_stackoverflow)
AU (1) AU539221B2 (enrdf_load_stackoverflow)
CA (1) CA1155279A (enrdf_load_stackoverflow)
DE (1) DE3168156D1 (enrdf_load_stackoverflow)
FR (1) FR2490866A1 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8527661D0 (en) * 1985-11-08 1985-12-11 Ici Plc Catalyst supports & precursors
US4758398A (en) * 1986-10-07 1988-07-19 The Dexter Corporation Method of manufacture preforms
WO1990014671A1 (en) * 1989-05-17 1990-11-29 Metal Manufactures Limited Manufacture of mineral insulated metal sheathed cables
US6119922A (en) * 1998-11-17 2000-09-19 Hoskins Manufacturing Company Method for making mineral insulated cable

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1523434A (en) * 1920-10-25 1925-01-20 Gutler Hammer Mfg Co Electric heater
NL40958C (enrdf_load_stackoverflow) * 1934-05-29
BE412573A (enrdf_load_stackoverflow) * 1935-10-25
US2219523A (en) * 1937-07-17 1940-10-29 Edwin L Wiegand Electric resistance heating element and method of making the same
US2243881A (en) * 1938-01-18 1941-06-03 Titeflex Metal Hose Co Method for making radio shielded conductors
FR843366A (fr) 1938-03-07 1939-06-30 Electro Cable Soc Fils et câbles électriques à isolant minéral et leurs procédés de fabrication
US2495867A (en) * 1948-01-14 1950-01-31 Petcar Res Corp Method of manufacturing fire detector and like elements
BE536345A (enrdf_load_stackoverflow) * 1954-03-12
CH329528A (fr) * 1954-08-27 1958-04-30 Kraffe De Laubarede Leonce Mar Procédé pour la fabrication de corps isolants de la chaleur et de l'électricité
US3017688A (en) * 1957-02-28 1962-01-23 Gen Motors Corp Method and apparatus of making electrical heating elements
US3105287A (en) * 1957-05-08 1963-10-01 Rea Magnet Wire Company Inc Insulated wire particularly for coils and the manufacture thereof
US3121038A (en) * 1960-06-01 1964-02-11 Gen Electric Method of providing a high resistance insulation coating for a conductor in a sheath
GB1109402A (en) * 1966-03-31 1968-04-10 Decca Ltd Improvements in or relating to position indicators for use in mobile craft
US4033028A (en) * 1974-06-21 1977-07-05 Pyrotenax Of Canada Limited Method of making heating cables
DE2514578B2 (de) * 1975-04-03 1978-09-07 Fa. Fritz Eichenauer, 6744 Kandel Feuerfeste, körnige Einbettmasse für elektrische Heizspiralen
JPS6018093B2 (ja) * 1976-10-20 1985-05-08 三菱電線工業株式会社 無機絶縁電線の製造方法
US4106186A (en) * 1976-11-24 1978-08-15 The United States Of America As Represented By The United States Department Of Energy Boron nitride insulating material
JPS5814007B2 (ja) * 1978-01-18 1983-03-17 日立電線株式会社 無機絶縁電線の製造方法

Also Published As

Publication number Publication date
AU7553181A (en) 1982-04-01
EP0048426A1 (fr) 1982-03-31
AU539221B2 (en) 1984-09-13
JPS5787015A (en) 1982-05-31
FR2490866A1 (fr) 1982-03-26
DE3168156D1 (en) 1985-02-21
US4420881A (en) 1983-12-20
FR2490866B1 (enrdf_load_stackoverflow) 1983-08-12
CA1155279A (fr) 1983-10-18

Similar Documents

Publication Publication Date Title
US3284372A (en) Apparatus and process for continuously making baked and graphitized carbon bodies
US2905919A (en) Electric heating cables
CN1902718B (zh) 具有空气通道的糊料挤压的绝缘导线、其制备方法及包括其的同轴电缆
US4689443A (en) Armored cable having mineral insulation
DE102017217122A1 (de) Hochtemperaturbauteil und Verfahren zur Herstellung
CN108934087B (zh) 碳发热体
EP0048426B1 (fr) Procédé de fabrication d'une préforme pour câble électrique à isolant minéral comprimé
FR2624302A1 (fr) Brin composite supraconducteur a haute temperature critique et procede de fabrication
JP6937378B2 (ja) セラミックの塊からなる素体を製造するための方法および押出し成形装置並びに素体
US4378267A (en) Apparatus for manufacturing coaxial cable
EP1052707A3 (en) Manufacturing process of superconducting wire and retainer for heat treatment
CA2343841C (en) Process for the production of conducting wires coated with cross-linked polyethylene
US2892988A (en) Electrical resistance elements and method of producing the same
EP0472540B1 (en) Manufacture of mineral insulated metal sheathed cables
EP1010185B1 (en) Mineral insulated cable
JPH08203358A (ja) 架橋用ポリエチレン混和物の押出し方法
CN105551693A (zh) 一种挤出式矿物绝缘射频电缆的制造方法及射频电缆
US4534997A (en) High-temperature carbon fiber coil and method for producing same
US2084840A (en) Resistor element
GB2343989A (en) Mineral insulated cable with low thermal conductivity and method of manufacture
RU2498435C1 (ru) Способ изготовления электрического провода
SU1525951A1 (ru) Способ изготовлени электрического нагревател из хромита лантана
US962910A (en) Apparatus for the continuous manufacture of filaments.
JP2903215B2 (ja) ケーブルのモールドジョイント工法
JPH07192561A (ja) 架橋ポリエチレン絶縁ケーブルの製造方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19820812

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 3168156

Country of ref document: DE

Date of ref document: 19850221

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940823

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19940929

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19940930

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19950915

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950915

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19960531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19960601

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST