GB903207A - Improvements in or relating to the extrusion of metal sheaths for electric cables - Google Patents

Improvements in or relating to the extrusion of metal sheaths for electric cables

Info

Publication number
GB903207A
GB903207A GB1104161A GB1104161A GB903207A GB 903207 A GB903207 A GB 903207A GB 1104161 A GB1104161 A GB 1104161A GB 1104161 A GB1104161 A GB 1104161A GB 903207 A GB903207 A GB 903207A
Authority
GB
United Kingdom
Prior art keywords
nozzle
sheath
extrusion
tractive force
extruded
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
GB1104161A
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.)
Pirelli and C SpA
Original Assignee
Pirelli SpA
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 Pirelli SpA filed Critical Pirelli SpA
Publication of GB903207A publication Critical patent/GB903207A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/22—Making metal-coated products; Making products from two or more metals
    • B21C23/24—Covering indefinite lengths of metal or non-metal material with a metal coating
    • B21C23/26—Applying metal coats to cables, e.g. to insulated electric cables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/22—Making metal-coated products; Making products from two or more metals
    • B21C23/24—Covering indefinite lengths of metal or non-metal material with a metal coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work

Abstract

903,207. Extruding cable sheaths. PIRELLI S.p.a. March 27, 1961 [April 11, 1960], No. 11041/61. Class 83 (4). A cable sheath 3 is formed by supplying molten metal, particularly aluminium, to an extrusion nozzle 1, 2 under atmospheric pressure, applying to the sheath already extruded on intermittent tractive force in an axial direction away from the nozzle so that the extrusion proceeds in steps, and cooling the molten metal in the vicinity of the nozzle. The molten aluminium is fed by gravity at atmospheric pressure into chamber 4 where its temperature is maintained by a heater 5. A cooling fluid is circulated through chamber 6 surrounding the nozzle and a low melting point alloy of lead, bismuth cadmium and/or tin, which has a lower melting point than the extrusion metal, is fed from a reservoir 9 by a pump 10 to a groove 12 surrounding the extruded sheath 3. This alloy reduces friction in the nozzle and is subsequently collected in a funnel 13 leading to the reservoir. A fluid such as water is sprayed on to the extruded sheath from nozzle 16. The intermittent tractive force is applied to the sheath by projections 19 of hard rubber on contra-rotating rollers 17, 18, Fig. 2, which are carried by levers 22, 23 adjusted by a screw 26. The number and circumferential length of the projections may be varied and the speed of the rollers may be adjusted. Alternatively, the tractive force may be applied by fluid pressure reciprocated jaws. Finally, the sheath is reduced in diameter and into contact with the cable core by a die or rolls.
GB1104161A 1960-04-11 1961-03-27 Improvements in or relating to the extrusion of metal sheaths for electric cables Expired GB903207A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT681360 1960-04-11

Publications (1)

Publication Number Publication Date
GB903207A true GB903207A (en) 1962-08-15

Family

ID=11122093

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1104161A Expired GB903207A (en) 1960-04-11 1961-03-27 Improvements in or relating to the extrusion of metal sheaths for electric cables

Country Status (4)

Country Link
CH (2) CH376458A (en)
DE (1) DE1402765A1 (en)
ES (1) ES266707A1 (en)
GB (1) GB903207A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103817161A (en) * 2014-02-26 2014-05-28 泉州市一鸣交通电器有限公司 Apparatus used for manufacturing warm and cold swaging stay tube and method for manufacturing lead sleeve by using apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103817161A (en) * 2014-02-26 2014-05-28 泉州市一鸣交通电器有限公司 Apparatus used for manufacturing warm and cold swaging stay tube and method for manufacturing lead sleeve by using apparatus
CN103817161B (en) * 2014-02-26 2015-12-16 泉州市一鸣交通电器有限公司 A kind of manufacture warm cold-extruded forging pipe drawing device

Also Published As

Publication number Publication date
ES266707A1 (en) 1963-07-16
CH376458A (en) 1964-04-15
DE1402765A1 (en) 1968-11-14
CH375317A (en) 1964-02-29

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