FR2267871A1 - Polyethylene sheathing offering high radial thermal retraction - made by annular dilation of a polygonal section extrudate - Google Patents

Polyethylene sheathing offering high radial thermal retraction - made by annular dilation of a polygonal section extrudate

Info

Publication number
FR2267871A1
FR2267871A1 FR7413255A FR7413255A FR2267871A1 FR 2267871 A1 FR2267871 A1 FR 2267871A1 FR 7413255 A FR7413255 A FR 7413255A FR 7413255 A FR7413255 A FR 7413255A FR 2267871 A1 FR2267871 A1 FR 2267871A1
Authority
FR
France
Prior art keywords
profile
sheathing
polygonal
shrinkage
dia
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.)
Granted
Application number
FR7413255A
Other languages
French (fr)
Other versions
FR2267871B1 (en
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.)
ISOLANTS CIE FRANCAISE
Original Assignee
ISOLANTS CIE FRANCAISE
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 ISOLANTS CIE FRANCAISE filed Critical ISOLANTS CIE FRANCAISE
Priority to FR7413255A priority Critical patent/FR2267871A1/en
Publication of FR2267871A1 publication Critical patent/FR2267871A1/en
Application granted granted Critical
Publication of FR2267871B1 publication Critical patent/FR2267871B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating 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
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/06—Making preforms having internal stresses, e.g. plastic memory
    • B29C61/08—Making preforms having internal stresses, e.g. plastic memory by stretching tubes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable

Landscapes

  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

Tubular heat shrink sheathing with a cylindrical profile exhibiting a high degree of shrinkage to a shape with a polygonal external profile. Prodn. of such sheathing by extrusion through a die/mandrel combination defining a polygonal profile with a coaxial circular section passage, followed by use of heat and internal pressure to reshape the profile to the circular shape of dia. 'theta' necessary to just enclose the original polygonal profile. The dia. of the bore passage as initially extruded should be =1 5 theta. Used for mfr. of cable sheathing or sleeves for enclosing multicore cables requiring surface contraction factors. 4, with concurrent longitudinal contraction factors of =5%. Degree of shrinkage is a function of the initial profile surface area to the extruded profile surface area: this ratio is enhanced by using a non-cicular cross-section, the ratio increasing as the number of sides of the polygonal form decreases. High shrinkage ratios result in tighter fitting, better sealed sheathing, and/or large bores to make it easier to fit the sheat over the cable end prior to contraction.
FR7413255A 1974-04-16 1974-04-16 Polyethylene sheathing offering high radial thermal retraction - made by annular dilation of a polygonal section extrudate Granted FR2267871A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7413255A FR2267871A1 (en) 1974-04-16 1974-04-16 Polyethylene sheathing offering high radial thermal retraction - made by annular dilation of a polygonal section extrudate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7413255A FR2267871A1 (en) 1974-04-16 1974-04-16 Polyethylene sheathing offering high radial thermal retraction - made by annular dilation of a polygonal section extrudate

Publications (2)

Publication Number Publication Date
FR2267871A1 true FR2267871A1 (en) 1975-11-14
FR2267871B1 FR2267871B1 (en) 1976-12-17

Family

ID=9137689

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7413255A Granted FR2267871A1 (en) 1974-04-16 1974-04-16 Polyethylene sheathing offering high radial thermal retraction - made by annular dilation of a polygonal section extrudate

Country Status (1)

Country Link
FR (1) FR2267871A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2601285A1 (en) * 1986-07-10 1988-01-15 Pirelli Treficable THERMORETRACTABLE SLEEVE HAVING MEANS FOR CONTROLLING ITS UNIFORM HEATING, AND METHOD OF MANUFACTURING THE SLEEVE.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2601285A1 (en) * 1986-07-10 1988-01-15 Pirelli Treficable THERMORETRACTABLE SLEEVE HAVING MEANS FOR CONTROLLING ITS UNIFORM HEATING, AND METHOD OF MANUFACTURING THE SLEEVE.
EP0253721A1 (en) * 1986-07-10 1988-01-20 Treficable Pirelli Heat-shrinkable sleeve comprising means for controlling its uniform heating and method for its manufacture
AU597080B2 (en) * 1986-07-10 1990-05-24 Treficable Pirelli Heat-shrinkable sleeve including means for control of its uniform heating, and method of manufacture of this sleeve

Also Published As

Publication number Publication date
FR2267871B1 (en) 1976-12-17

Similar Documents

Publication Publication Date Title
SE8501212D0 (en) SET FOR MANUFACTURE OF PREMIUATED PIPES
ES431416A1 (en) Device for producing externally ribbed pipes of plastic
GB1160013A (en) Thermally Insulated Pipes
FI801500A (en) EXHAUST EQUIPMENT FOR EXTRUDING OF PLASTIC MATERIAL WITH SAMMANSATTA VAEGGAR
HUT51965A (en) Shaped plastic band for producing wound tubes
ES416009A1 (en) Method of and apparatus for extruding plastic materials
KR860006336A (en) Composite pipe and its manufacturing method
FR2267871A1 (en) Polyethylene sheathing offering high radial thermal retraction - made by annular dilation of a polygonal section extrudate
GB1398548A (en) Shotgun cartridge cases
GB1434775A (en) Insulating wires and cables with highly expanded polyolefin
ES8608389A1 (en) Manufacturing heat-shrinkable sleeve using solid core.
CN214726476U (en) Thermal shrinkage branch finger stall
ES404065A2 (en) Manufacture of insulated electric cables
GB453481A (en) Improvements in and relating to water-tight jackets and sheaths of electric cables
JPS57156227A (en) Manufacture of tubular body
GB1163308A (en) Methods of and apparatus for making Insulated Electric Conductors
KR880001417A (en) Continuous manufacturing device of cross-linked heat shrink tube
GB1303112A (en)
KR930011008A (en) Method and device for manufacturing alarm cable
GB1207555A (en) Manufacture of insulated conductors
GB1124537A (en) An extrusion press for sheathing cables
GB1262663A (en) Transversely corrugated plastics tube and the manufacture of such
JPS5824336Y2 (en) Cable core connection device
GB1359836A (en) Method of manufacturing a coated wire and apparatus relevant thereto
ES455310A1 (en) Dielectric fluid filled electric power cables

Legal Events

Date Code Title Description
ST Notification of lapse