GB1339461A - Cables - Google Patents

Cables

Info

Publication number
GB1339461A
GB1339461A GB4438871A GB1339461DA GB1339461A GB 1339461 A GB1339461 A GB 1339461A GB 4438871 A GB4438871 A GB 4438871A GB 1339461D A GB1339461D A GB 1339461DA GB 1339461 A GB1339461 A GB 1339461A
Authority
GB
United Kingdom
Prior art keywords
plastics
die
conductor
cavitation
insulation
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
GB4438871A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB1339461A publication Critical patent/GB1339461A/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
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/14—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration
    • 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
    • B29C48/03—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)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

1339461 Cellular plastics made by ultrasonic vibration STANDARD TELEPHONES & CABLES Ltd 23 Sept 1971 44388/71 Heading C3C [Also in Divisions B4-B5 and H1] An electrical conductor wire 1 is sheathed with cellular plastics insulation by passage through an extrusion die 4 from which the molten plastics is delivered as the conductor is ultrasonically vibrated to produce cavitation of the plastics which is prevented from collapse by cooling of the plastics. The conductor 1 passes through the die 4 between vibration dampers 7, 8 e.g. each consisting of a pair of diametrically opposed and spring loaded pulleys, and the vibrations are preferably applied between the upstream damper 7 and the die 4 by a device 9 e.g. a radio frequency generator 10, transducer 11, and velocity transformer 12. The frequency and intensity of the vibration may be varied to produce the cavitation within, or downstream of the die 4, and the cavitation may extend throughout the cross-section of the applied insulation or be restricted to the immediate vicinity of the conductor. The insulation may comprise polyethylene, polypropylene, polyvinyl chloride; or polystyrene.
GB4438871A 1971-09-23 1971-09-23 Cables Expired GB1339461A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4438871 1971-09-23

Publications (1)

Publication Number Publication Date
GB1339461A true GB1339461A (en) 1973-12-05

Family

ID=10433058

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4438871A Expired GB1339461A (en) 1971-09-23 1971-09-23 Cables

Country Status (2)

Country Link
AU (1) AU4603572A (en)
GB (1) GB1339461A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2341341A (en) * 1998-09-02 2000-03-15 Px Technologies Ltd Improvements in or relating to moulding

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2341341A (en) * 1998-09-02 2000-03-15 Px Technologies Ltd Improvements in or relating to moulding

Also Published As

Publication number Publication date
AU4603572A (en) 1974-03-07

Similar Documents

Publication Publication Date Title
FR94208E (en) Process for the insulation of thin electrical conductors and in particular of extremely thin copper conductors, with thermoplastic plastics.
FR1109753A (en) Device for obtaining, from thermoplastic masses or similar materials, helically subdivided cords and intended in particular for the insulation of conductors and electric cables
NL139542B (en) PROCESS FOR THE PREPARATION OF ELASTIC THERMOPLASTIC MOLDING MASSES WITH ANTI-STATIC PROPERTIES, AND PRODUCTS MANUFACTURED INTO OR PART OF THESE THERMOPLASTIC MOLDING MASSES.
FR1485255A (en) Method and device for the molding and orientation of polymers and new products thus obtained
IT1053964B (en) DEVICE FOR DAMPING OSCILLATIONS IN THE TRANSMISSION OF MOTOR VEHICLES
GB1339461A (en) Cables
GB1376397A (en) Apparatus for damping vibration of a suspended linear body
ATE30431T1 (en) ANTISTATIC PLASTICS AND THE PRODUCTION OF SAME.
GB1120958A (en) Improvements in or relating to highway safety barriers
CH439510A (en) Equipment for the generation of a continuous and variable magnetic field, for biomedical and therapeutic applications
GB1075332A (en) Drawing apparatus employing vibratory energy
IT945055B (en) METHOD FOR MODIFYING THE PHYSICAL PROPERTIES OF MOLDED THERMOPLASTIC POLYMERS AND PRODUCT OBTAINED
FR1455243A (en) Method for the definite increase in the molecular weight of unsaturated polymeric hydrocarbons
JPS53277A (en) Production of olefin polymers
GB1096578A (en) Electrical positioning device
BE670989A (en) Device for modifying the fundamental frequency and the articulation speed of the voice
FR95514E (en) Process for the insulation of thin electrical conductors and in particular of extremely thin copper conductors, with thermoplastic plastics.
CA694426A (en) Formable thermoplastic polymer composition and method of producing foamed thermoplastic polymers
MY6100016A (en) Method of polymerization of olefins and the linear high molecular weight polymers produced thereby
FR1485928A (en) Method of regulating the molecular weight of ethylene interpolymers and an alpha-olefin
GB1162590A (en) An Improved Method of Cooling Rolled Wire
고려한 et al. 53% Linear Motor 9ļ ik 35 E
JPS5445787A (en) Manufacture and manufacturing device of communication cable
CA712512A (en) Method for producing shaped articles from polymers and copolymers of acrylonitrile
FR1350471A (en) Explosive connection cord

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee