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EP1681684A2 - Vorrichtung zur herstellung elektrische kabel mit einer umhullung von siliconkunststoffen und ahnlichen materialien - Google Patents

Vorrichtung zur herstellung elektrische kabel mit einer umhullung von siliconkunststoffen und ahnlichen materialien Download PDF

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Publication number
EP1681684A2
EP1681684A2 EP06100053A EP06100053A EP1681684A2 EP 1681684 A2 EP1681684 A2 EP 1681684A2 EP 06100053 A EP06100053 A EP 06100053A EP 06100053 A EP06100053 A EP 06100053A EP 1681684 A2 EP1681684 A2 EP 1681684A2
Authority
EP
European Patent Office
Prior art keywords
tank
molten salts
cable
curved portion
salts
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.)
Withdrawn
Application number
EP06100053A
Other languages
English (en)
French (fr)
Other versions
EP1681684A3 (de
Inventor
Giorgio Volpato
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.)
CET Electric Srl
Original Assignee
CET Electric Srl
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 CET Electric Srl filed Critical CET Electric Srl
Publication of EP1681684A2 publication Critical patent/EP1681684A2/de
Publication of EP1681684A3 publication Critical patent/EP1681684A3/de
Withdrawn legal-status Critical Current

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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
    • 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
    • H01B13/145—Pretreatment or after-treatment
    • 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
    • H01B13/146—Controlling the extrusion apparatus dependent on the capacitance or the thickness of the insulating material

Definitions

  • the present invention relates to an apparatus particularly for manufacturing electrical cables with sheathing made of silicone rubber and the like.
  • the manufacture of an electrical cable with a silicone rubber sheathing occurs, after a process for extruding the insulating material to sheathe the copper conductor with a mixture of silicone rubber activated by means of suitable chemical components, by catalysis of the mixture of insulating material by passage through a linear oven which is approximately 20-25 m long and in which a bath in a tank of molten salts, kept at a temperature of 250-270°C, allows to complete the process.
  • At the outlet of the oven means for washing and drying the sheathed electrical cable are provided.
  • the main limitations are in fact linked to their structure and to the speed at which the cable is made to advance.
  • the balance between the length of the oven, the distribution of the molten salts and the production rate is therefore a physical limitation that cannot be exceeded easily.
  • Italian Patent Application No. PD2000A232 filed on 6 October 2000 in the name of this same Applicant, discloses an oven which comprises a tank for containing the molten salts which has, arranged in an operating sequence, a longitudinally elongated initial portion, an intermediate motorized wheel for redirecting the electrical cable being processed from the longitudinal direction of the initial portion to the longitudinal direction of a final portion which is also longitudinally elongated, and forms, on the horizontal plane, an angle of approximately 30 sexagesimal degrees with respect to the initial portion.
  • the oven further comprises a duct for the passage of the molten salts, which is immersed in such bath of salts and is arranged at the bottom of the tank, with an inlet arranged at the intermediate portion in a direction which matches the direction of motion of the molten salts, and with outlets arranged proximate to the inlet part of the initial portion.
  • This type of oven solves effectively the problems related to apparatuses of the known type, in which a difference in level of the bath of molten salts is produced between the inlet and outlet portions of the oven during the processing of the cable, but its structure is rather complicated and comprises for example the redirection wheel, the supporting means and the antislip means thereof, as well as its motorization means.
  • the wheel for redirecting the sheathed electrical cable may operate unevenly, due to the variable friction and resistance forces constituted by the mass of molten salts in which it is immersed.
  • the aim of the present invention is to provide an apparatus particularly for manufacturing electrical cables with sheathing made of silicone rubber and the like, which is capable of obviating the problems and drawbacks of known types of apparatus.
  • an object of the present invention is to provide an apparatus which is capable of redistributing and recirculating the molten salts no less effectively than known types of apparatus.
  • Another object is to provide an apparatus which allows to increase production speed and capacity.
  • Another object is to provide an apparatus which is simpler and cheaper than known apparatuses and entails at the same time an energy saving.
  • Further object of the invention is to provide an apparatus which allows to save on logistics and personnel costs.
  • Still further object of the present invention is to provide an apparatus which ensures a cleaning and drying of the sheathed cable that exits from the oven whose quality is not inferior to that of known types of apparatus.
  • Another object is to provide an apparatus which can be manufactured cheaply with known types of apparatus and technology.
  • an apparatus for manufacturing electrical cables with sheathing made of silicone rubber and the like of the type which comprises, within a substantially longitudinally elongated catalysis oven, a tank for containing molten salts, an electrical cable sheathed in silicone rubber or the like being immersed in said salts so as to transit therein, said tank being provided with means for recirculating said molten salts, means for cleaning and drying the sheathed electrical cable being provided in output from said oven, said apparatus being characterized in that said recirculation means for the molten salts are constituted by a curved portion of said tank, said curved portion being adapted to redirect the molten salts entrained by the advancement of the cable immersed in said salts within the rectilinear portion of said tank toward a recirculation channel, which is adapted to guide the molten salts toward the initial part of said tank, in which the inlet of the electrical cable is located.
  • an apparatus for manufacturing electrical cables with sheathing made of silicone rubber and the like according to the invention is generally designated by the reference numeral 10.
  • the apparatus 10 comprises, inside a catalysis oven 11 which is substantially longitudinally elongated, a tank 12 for containing molten salts 13, inside which catalysis of the insulating material with which an electrical cable 14 is sheathed occurs.
  • the tank 12 is provided with recirculation means for the molten salts 13.
  • the salts 13 are in fact entrained by the advancement motion of the cable 14 toward the end of the tank 12 from which the cable 14 then exits.
  • the recirculation means for the molten salts are constituted by a curved portion 17 of the tank 12.
  • the curved portion 17 is adapted to redirect the molten salts 13, entrained as mentioned by the advancement of the cable 14 immersed therein, toward a recirculation channel 19, which is adapted to guide the molten salts 13 toward the initial part 20 of the tank 12.
  • the part 20 is provided with an inlet 20a for the electrical cable 14, which arrives from the extrusion means, which have sheathed it with insulating material.
  • the curved portion 17 of the tank 12 traces substantially a circular arc.
  • the curved portion 17 traces an angle of 180°.
  • the external wall 21 of the curved portion 17 lies along a circumference the diameter of which is substantially three times the transverse width of the rectilinear portion 18 of the tank 12.
  • the internal wall 22 of the curved portion 17 lies on a circumference the diameter of which is substantially one third of the diameter related to the external wall 21 of the curved portion 17.
  • the tank 12 is made of stainless steel.
  • the tank 12 is closed by a cover 12a.
  • the cleaning and drying means 16 are supported by a supporting frame 24 and are formed by two blowers 25.
  • the sheathed electrical cable 14 that exits from the oven 11 and from the tank 12 passes within the blowers 25.
  • Each blower 25 is constituted by an outer jacket 26, into which air is injected which arrives from an injection tube 27 functionally connected thereto.
  • the electrical cable 14 passes axially through the tubular element 28.
  • the cable 14 is cleaned and at least partially dried by the air pushed through the plurality of holes 29.
  • the jacket 26 and the tubular element 28 rigidly coupled thereto are cylindrical and coaxial.
  • the tubular element 28 is provided, on the side where the cable 14 enters, with an opening 30 toward the outside of the blower 25, so as to allow the exit of the grains of salt separated by the injected air.
  • the holes 29 are arranged substantially along helical paths on the tubular element 28.
  • the blowers 25 are arranged so that the electrical cable 14 passes through them, moving upward along an inclined path.
  • the two blowers 25 are then arranged in series along a rising ramp of the supporting frame 24, so that the grains of salt that detach fall back toward the tank 12.
  • the blowers 25 are fed with hot air (at approximately 180 °C) which arrives from a copper duct 31, which is immersed, over at least part of its length, in the molten salts.
  • the duct 31 heats the air intended for the cleaning means 16, since it is connected to the blowers 25 by means of the injection tubes 27 described above.
  • the tubes 27 are advantageously made of flexible material which can withstand temperatures up to 200 °C.
  • the tubes 27 are made of Teflon.
  • the cable 14 is immersed in the bath of molten salts 13, and by advancing at a very high speed (up to 400 meters per minute) entrains part of the salts 13 toward the curved portion 17.
  • the wall 34 therefore separates the rectilinear portion 18 in which the cable 14 advances from the recirculation channel 19.
  • the wall 34 ends at the part 20 of the tank 12 where the salts 13 encounter the new incoming cable 14.
  • the present invention provides an apparatus for manufacturing electrical cables with sheathing made of silicone rubber and the like which is capable of redistributing and recirculating the molten salts no less effectively than known types of apparatus.
  • the present invention provides an apparatus which allows to increase production speed and capacity.
  • the present invention provides an apparatus which is far simpler and cheaper than known apparatuses and entails at the same time a saving both in terms of components and in terms of assembly and maintenance, as well as an extremely important energy saving.
  • the present invention provides an apparatus which ensures a cleaning and drying of the sheathed cable that exits from the oven whose quality is not lower than that of known types of apparatus.
  • the present invention provides an apparatus which can be manufactured cheaply with known types of equipment and technology.
  • the materials employed may be any according to requirements and to the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulating Bodies (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Manufacturing Of Electric Cables (AREA)
EP06100053A 2005-01-13 2006-01-04 Vorrichtung zur herstellung elektrische kabel mit einer umhullung von siliconkunststoffen und ahnlichen materialien Withdrawn EP1681684A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITPD20050005 ITPD20050005A1 (it) 2005-01-13 2005-01-13 Attrezzatua perfezionata per la realizzazione di cavi elettrici con rivestimento in gomma di silicone e simili

Publications (2)

Publication Number Publication Date
EP1681684A2 true EP1681684A2 (de) 2006-07-19
EP1681684A3 EP1681684A3 (de) 2007-06-13

Family

ID=36337667

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06100053A Withdrawn EP1681684A3 (de) 2005-01-13 2006-01-04 Vorrichtung zur herstellung elektrische kabel mit einer umhullung von siliconkunststoffen und ahnlichen materialien

Country Status (2)

Country Link
EP (1) EP1681684A3 (de)
IT (1) ITPD20050005A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106057360A (zh) * 2016-07-27 2016-10-26 芜湖顺成电子有限公司 一种低烟无卤阻燃电线的制备方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPD20000232A1 (it) 2000-10-06 2002-04-06 Cet Eletric Srl Struttura di forno particolarmente per la realizzazione di cavi elettrici in gomma di silicone o simile.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2204655C3 (de) * 1972-01-28 1982-03-04 Siemens AG, 1000 Berlin und 8000 München Verfahren zur Herstellung von elektrischen Kabeln oder Leitungen mit einer Umhüllung und/oder Isolierung auf der Basis eines vernetzten Polyäthylens
ITPD20020118A1 (it) * 2002-05-09 2003-11-10 Cet Eletric Srl Attrezzatura particolarmente per la realizzazione di cavi elettrici con rivestimento in gomma di silicone e simili

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPD20000232A1 (it) 2000-10-06 2002-04-06 Cet Eletric Srl Struttura di forno particolarmente per la realizzazione di cavi elettrici in gomma di silicone o simile.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106057360A (zh) * 2016-07-27 2016-10-26 芜湖顺成电子有限公司 一种低烟无卤阻燃电线的制备方法

Also Published As

Publication number Publication date
ITPD20050005A1 (it) 2006-07-14
EP1681684A3 (de) 2007-06-13

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