GB742760A - Improvements in or relating to methods for the production of an insulating layer of foam plastics on an electrical conductor - Google Patents

Improvements in or relating to methods for the production of an insulating layer of foam plastics on an electrical conductor

Info

Publication number
GB742760A
GB742760A GB25610/53A GB2561053A GB742760A GB 742760 A GB742760 A GB 742760A GB 25610/53 A GB25610/53 A GB 25610/53A GB 2561053 A GB2561053 A GB 2561053A GB 742760 A GB742760 A GB 742760A
Authority
GB
United Kingdom
Prior art keywords
percolator
gas
heated
cylinder
plate
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
GB25610/53A
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 GB742760A publication Critical patent/GB742760A/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
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/32—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
    • B29C44/322—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3442—Mixing, kneading or conveying the foamable 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/362—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using static mixing devices
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/64—Screws with two or more threads
    • B29C48/645—Screws with two or more threads neighbouring threads and channels having identical configurations

Abstract

742,760. Coating electrical conductors with plastic material. TELEFONAKTIE-BOLAGET L. M. ERICSSON. Sept. 16, 1953 [Sept. 29, 1952], No. 25610/53. Class 87 (2). In a method for making a foam insulated conductor, the plastic material (e.g. polyethylene, polystyrol, polyvinylchloride, polyvinylchloride acetate) is fed through a heated cylinder 3 by screw 2 where it is heated partly by friction and partly by heat from the cylinder and through a percolator plate 4 where a gas such as propane, butane or methyl chloride, is fed through input 6 to dissolve in the material which then passes through further percolator plates 7, 11, in extrusion head 8, to a heated nozzle 12 where it is extruded and expands around a conductor 9 which may be electrically pre-heated by transformer 15. The percolator plate 4 may be such that gas supplied through feed pipes 18, 19, Fig. 2, is distributed in two halves of the percolator plate by axial and radial channels 20, the material entering through apertures 17 and being pressed out through holes 21. The gas supply zone may be extended in such a manner that the cylinder is provided with several percolator plates and input terminals for the gas or the material may pass to contact with the gas, through a chamber provided in the screw length, Fig. 3 (not shown), and where an alteration of screw pitch or thread may be provided to prevent an accumulation of material. The apparatus may be provided with two or several parallel screws.
GB25610/53A 1952-09-29 1953-09-16 Improvements in or relating to methods for the production of an insulating layer of foam plastics on an electrical conductor Expired GB742760A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE742760X 1952-09-29

Publications (1)

Publication Number Publication Date
GB742760A true GB742760A (en) 1956-01-04

Family

ID=20323160

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25610/53A Expired GB742760A (en) 1952-09-29 1953-09-16 Improvements in or relating to methods for the production of an insulating layer of foam plastics on an electrical conductor

Country Status (2)

Country Link
FR (1) FR1084096A (en)
GB (1) GB742760A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3013109A (en) * 1961-03-16 1961-12-12 Anaconda Wire & Cable Co Electric cable
US3064073A (en) * 1960-07-27 1962-11-13 Du Pont Insulated electrical conductor
US3098229A (en) * 1959-06-17 1963-07-16 Gen Mills Inc Transmission line erected by pressurized plastic
DE1778863B1 (en) * 1967-06-16 1972-05-31 Nippon Telegraph & Telephone METHOD FOR PRODUCING A WIRE LINE WITH INSULATION FROM FOAMED PLASTIC AND DEVICE FOR CARRYING OUT THE METHOD
EP0275057A2 (en) * 1987-01-13 1988-07-20 W. Döllken & Co GmbH Apparatus for extruding profiles with an effect similar to that of marble

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1031390B (en) * 1955-09-17 1958-06-04 Francis George Hargreaves Method and device for manufacturing electrical cables
US2973552A (en) * 1956-02-29 1961-03-07 Du Pont Apparatus for wire manufacture
DE1092082B (en) * 1957-08-06 1960-11-03 Nippon Telegraph & Telephone Process for the production of wire insulated with foamed plastic

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3098229A (en) * 1959-06-17 1963-07-16 Gen Mills Inc Transmission line erected by pressurized plastic
US3064073A (en) * 1960-07-27 1962-11-13 Du Pont Insulated electrical conductor
US3013109A (en) * 1961-03-16 1961-12-12 Anaconda Wire & Cable Co Electric cable
DE1778863B1 (en) * 1967-06-16 1972-05-31 Nippon Telegraph & Telephone METHOD FOR PRODUCING A WIRE LINE WITH INSULATION FROM FOAMED PLASTIC AND DEVICE FOR CARRYING OUT THE METHOD
EP0275057A2 (en) * 1987-01-13 1988-07-20 W. Döllken & Co GmbH Apparatus for extruding profiles with an effect similar to that of marble
EP0275057A3 (en) * 1987-01-13 1989-10-25 W. Dollken & Co Gmbh Method and apparatus for extruding a thermoplastic extrudate composed of a basic polymer and at least one additional synthetic material producing an effect similar to that of marble

Also Published As

Publication number Publication date
FR1084096A (en) 1955-01-17

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