GB1386065A - Manufacture of electric cables - Google Patents

Manufacture of electric cables

Info

Publication number
GB1386065A
GB1386065A GB1382774A GB1382774A GB1386065A GB 1386065 A GB1386065 A GB 1386065A GB 1382774 A GB1382774 A GB 1382774A GB 1382774 A GB1382774 A GB 1382774A GB 1386065 A GB1386065 A GB 1386065A
Authority
GB
United Kingdom
Prior art keywords
covering
conductors
bore
parts
die
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
GB1382774A
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.)
Balfour Beatty PLC
Original Assignee
BICC PLC
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 BICC PLC filed Critical BICC PLC
Priority to GB1382774A priority Critical patent/GB1386065A/en
Publication of GB1386065A publication Critical patent/GB1386065A/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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
    • 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
    • B29C48/03—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
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • 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
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular 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
    • B29C48/05—Filamentary, e.g. strands

Landscapes

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

Abstract

1386065 Extrusion coating of twin conductors BRITISH INSULATED CALLENDER'S CABLES Ltd 13 Sept 1972 [13 Sept 1971] 13827/74 Divided out of 1371211 Heading B5A For use in apparatus for extruding a covering 14 on two or more parallel coplanar conductors including at least one with insulation 12, a die set comprises an outer die 21 of circular bore 22 and an inner die or point 31 having adjacent its outlet end a circular external section which, with the bore 22 of the outer die 21 defines an annular extrusion orifice. The bore 33 of the inner die 31, through which the conductors 11, 19 pass, has a non-circular section comprising arcuate parts 34 united by intermediate parts 35 shaped to suit the outline of the conductor assembly. The intermediate parts 35 may be re-entrant, forming a dumb-bell shaped bore. A method of manufacturing a cable comprises passing the conductors 11, 19 through the core tube of a machine having an extrusion orifice defined by the die set 21, 31, to apply a continuous overall covering 14 around the conductors, and establishing across the covering at the extrusion orifice a pressure differential sufficient to cause the covering 14 to collapse firmly on to the conductors but insufficient to force the covering back along the core tube. The resulting covering 14 is of approximately uniform radial thickness around most of its periphery, having arcuate end parts 16 united by re-entrant parts 17, and bounding a single bore 13. Preferably the pressure differential is maintained by evacuating the core tube as claimed in Specification 1,371,211; but if the covering 14 is to be treated by the application or abstraction of heat, super-atmospheric pressure may be applied via a fluid medium in a chamber surrounding the covering and sealed to the extrusion orifice, as claimed in Specification 1,386,066. The thickness of the covering 14 can be controlled by altering the throughput speed, so allowing wider tolerances on the dimensions of the dies 21, 31. It is stated that no bonding occurs between the primary insulation 12 and the covering 14, even without the use of French chalk or other preventive material, and even when the primary insulation and the covering are of the same material, e.g. PVC. Specifications 1,371,211 and 1,386,066 are referred to.
GB1382774A 1971-09-13 1971-09-13 Manufacture of electric cables Expired GB1386065A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1382774A GB1386065A (en) 1971-09-13 1971-09-13 Manufacture of electric cables

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1382774A GB1386065A (en) 1971-09-13 1971-09-13 Manufacture of electric cables

Publications (1)

Publication Number Publication Date
GB1386065A true GB1386065A (en) 1975-03-05

Family

ID=10030097

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1382774A Expired GB1386065A (en) 1971-09-13 1971-09-13 Manufacture of electric cables

Country Status (1)

Country Link
GB (1) GB1386065A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0136795A1 (en) * 1983-08-24 1985-04-10 Eaton Corporation Heating cable having radiation grafted jacket
US4676850A (en) * 1985-08-19 1987-06-30 Thomas & Betts Corporation Method of making an electrical cable for undercarpet wiring systems
US4695679A (en) * 1985-08-19 1987-09-22 Thomas & Betts Corporation Flat multiconductor cable for undercarpet wiring system
US4731506A (en) * 1986-10-29 1988-03-15 Noel Lee Signal cable assembly
US4783579A (en) * 1986-04-29 1988-11-08 Amp Incorporated Flat multi-conductor power cable with two insulating layers
USRE33750E (en) * 1986-10-29 1991-11-26 Signal cable assembly
US7989701B2 (en) 2007-11-27 2011-08-02 Sabic Innovative Plastics Ip B.V. Multiconductor cable assembly and fabrication method therefor
CN107610847A (en) * 2017-09-27 2018-01-19 江苏亨通高压海缆有限公司 Longitudinal wrapping mold capable of automatically falling off anti-blocking mold and anti-blocking method
CN112829260A (en) * 2020-12-31 2021-05-25 江苏亨通线缆科技有限公司 Extrusion die for polyvinyl chloride insulation flat cable protective sleeve

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0136795A1 (en) * 1983-08-24 1985-04-10 Eaton Corporation Heating cable having radiation grafted jacket
US4676850A (en) * 1985-08-19 1987-06-30 Thomas & Betts Corporation Method of making an electrical cable for undercarpet wiring systems
US4695679A (en) * 1985-08-19 1987-09-22 Thomas & Betts Corporation Flat multiconductor cable for undercarpet wiring system
US4783579A (en) * 1986-04-29 1988-11-08 Amp Incorporated Flat multi-conductor power cable with two insulating layers
US4731506A (en) * 1986-10-29 1988-03-15 Noel Lee Signal cable assembly
WO1988003318A1 (en) * 1986-10-29 1988-05-05 Noel Lee Improved signal cable assembly
USRE33750E (en) * 1986-10-29 1991-11-26 Signal cable assembly
US7989701B2 (en) 2007-11-27 2011-08-02 Sabic Innovative Plastics Ip B.V. Multiconductor cable assembly and fabrication method therefor
CN107610847A (en) * 2017-09-27 2018-01-19 江苏亨通高压海缆有限公司 Longitudinal wrapping mold capable of automatically falling off anti-blocking mold and anti-blocking method
CN112829260A (en) * 2020-12-31 2021-05-25 江苏亨通线缆科技有限公司 Extrusion die for polyvinyl chloride insulation flat cable protective sleeve

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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