US3881851A - Machines for forming insulation for high frequency transmitting coaxial lines - Google Patents

Machines for forming insulation for high frequency transmitting coaxial lines Download PDF

Info

Publication number
US3881851A
US3881851A US413023A US41302373A US3881851A US 3881851 A US3881851 A US 3881851A US 413023 A US413023 A US 413023A US 41302373 A US41302373 A US 41302373A US 3881851 A US3881851 A US 3881851A
Authority
US
United States
Prior art keywords
dies
machine
conductor
endless
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 - Lifetime
Application number
US413023A
Other languages
English (en)
Inventor
Jacques Allanic
Philippe Beraudy
Louis Guillon
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.)
Societe Anonyme de Telecommunications SAT
Original Assignee
Societe Anonyme de Telecommunications SAT
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 Societe Anonyme de Telecommunications SAT filed Critical Societe Anonyme de Telecommunications SAT
Application granted granted Critical
Publication of US3881851A publication Critical patent/US3881851A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
    • H01P11/001—Manufacturing waveguides or transmission lines of the waveguide type
    • H01P11/005—Manufacturing coaxial lines
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • 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
    • H01B13/067—Insulating coaxial 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/30—Mounting, exchanging or centering
    • B29C33/301—Modular mould systems [MMS], i.e. moulds built up by stacking mould elements, e.g. plates, blocks, rods
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/0015—Making articles of indefinite length, e.g. corrugated tubes
    • B29C49/0027—Making articles of indefinite length, e.g. corrugated tubes involving the change of moulds, e.g. in production processes without interrupting the production processes
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/28—Blow-moulding apparatus
    • B29C49/30—Blow-moulding apparatus having movable moulds or mould parts
    • B29C49/38—Blow-moulding apparatus having movable moulds or mould parts mounted on movable endless supports
    • B29C49/40—Blow-moulding apparatus having movable moulds or mould parts mounted on movable endless supports on co-operating drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid
    • B29L2023/225—Insulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3412—Insulators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3462—Cables

Definitions

  • ABSTRACT A machine for forming between-conductor insulation in a coaxial electric conductor pair usable as a transmission line for very high frequency signals.
  • the insulation is of the so-called balloon" type, that is it consists of a thin thermoplastic tube constricted onto the central conductor at regularly :spaced points by means of endless chains of small dies progressing at the same speed as the conductor and part of which press the tube against said conductor at said points.
  • a small number of dies succeeding each other in the chain are exchanged at random time intervals for an equal number of similar dies taken from a reserve magazine, this being done without having to stop the operation of the machine.
  • the dies of a chain are not mechanically interconnected and simply push each other in endless slides. A mechanism effecting substitution of a group of dies taken from the magazine for an equal number of dies taken in the chain during progression of the latter is described.
  • the present invention relates to new machines for the manufacturing of between-conductor insulation for coaxial conductor pairs (also frequently called coaxial lines) adapted to the transmission of high frequency and very high frequency signals, in particular telecommunication signals.
  • coaxial pairs adapted to the transmission of such signals consist of an inner conductor secured inside an outer tubular conductor by means of an aerated insulation made of a thermoplastic material such as polyethylene, for instance, having a low dielectric constant and a low loss factor, so as to give the high frequency attenuation of the coaxial pair as small as possible a value.
  • balloon insulation which consists of a thin tube of thermoplastic material applied inside the outer conductor except at points periodically distributed along the pair, at which the tube is constricted up to contact with the inner conductor.
  • such an insulation can be obtained by means of a device described in the U.S. Pat. No. 2,760,228.
  • the method used in that device consists in extruding around the inner conductor a tube of thermoplastic material having a diameter larger than that of said conductor and which, before its complete cooling, is constricted from point to point onto the inner conductor, so as to form successive cylindrical air-filled rooms.
  • the constricting of the tube is effected by means of a series of small dies having a suitable form, assembled as an endless chain and each mechanically interconnected with the preceding and the following one.
  • the main purpose of the present invention is the suppression of the just mentioned effects, by elimination of the periodic character of the irregularities of the type specified.
  • an insulation forming machine for coaxial pairs makes use, like that of the above-cited U.S. patent, of the extrusion of a thermoplastic tube, filled with air under pressure and periodically constricted by a succession of small, substantially identical dies, juxtaposed along an endless chain driven at a linear speed equal to that of the motion of the inner conductor of the coaxial pair.
  • no special means is provided for driving the conductor at a constant linear speed.
  • the conductor is automatically driven by its adherence to the still hot extruded plastic material, itself driven by the moving dies of the endless chain.
  • the arrangement of the present invention differs from that of the U.S. Pat. No. 2,760,228 in that the latter chain is not directly driven as a whole by an electric motor, for instance, but through the intermediate of endless screws engaging part of the dies and themselves driven by such a motor. 7
  • the small dies although individually contacting the preceding and the following one, are not mechanically interconnected with each other and move inside endless slides.
  • a mechanism for replacing, at instants willfully selected at random, a group of a small number of consecutive dies by a group of an equal number of similar dies taken from a reserve magazine, such replacing being effected without having to stop the ma chine, which on the contrary continues operation at its normal speed.
  • the resulting form variations in the insulation do not repeat themselves at regulary spaced points along the insulated conductor.
  • progression of the small dies is effected with the help of endless screws, the axis of which is parallel to the direction of said progression along the conductor and the pitch of which is much smaller than the half-wavelength corresponding to the maximum frequency of the signals to be transmitted on the coaxial pair.
  • endless screws present geometrical defects, the latter only result, in the obtained insulation, into form variations at points the spacing of which is also much smaller than the said half-wavelength.
  • the driving mechanism of the endless screws which makes use of a known technology, is determined according to the invention in such way that eventual variations in the velocities of its elements only appear in the insulated conductor as local variations in the mass of the insulation at certain points, the spacings of which are also smaller than the half-wavelength corresponding to the maximum frequency of the signals to be transmitted on the coaxial pair.
  • FIG. 1 shows the use of a first type of machine, according to the invention, capable of producing insulation whose maximum diameter is in the neighborhood of 15 mm, for coaxial pairs operated up to 1,000 MHz;
  • FIG. 2 shows an inner conductor of a coaxial pair enclosed in an insulation produced by means of the machine represented in FIG. 1;
  • FIG. 3 shows the small metallic dies that, by superimposing themselves, form the moulding imprint of the insulation shown in FIG. 2;
  • FIG. 4 shows the formation of the complete imprint having produced the insulation shown in FIG. 2;
  • FIG. 5 shows a general view of the insulation forming machine, according to the invention, including a partial longitudinal section of the machine
  • FIG. 6 shows a schematic view of one of the two arrangements for exchanging the small dies of the machine, respectively shown in FIGS. 1 and 5;
  • FIGS. 7 and 8 show two types of insulation forming machines according to the invention, seen from the side of the thermoplastic tube intake and intended for insulations having diameters up to 50 mm, for very high frequencies.
  • FIG. 1 shows the use of a first type of machine, according to the invention, for producing an insulation with a maximum diameter in the neighborhood of mm.
  • An extruder 1 delivers a tube of thermoplastic material 2 around a metallic conductor 3, with an inside diameter greater than that of this conductor.
  • This assembly is drawn into the insulation forming machine which carries the small metallic dies 4 moved by endless screws 5 located in mountings G and H.
  • the thermoplastic material tube 2 which has not yet completely cooled inflates under air pressure introduced in chamber 6 and takes the shape of the impressions in the small dies 4.
  • air under suitable counter-pressure is admitted to chamber '7.
  • the metallic conductor with its insulating cover goes through a hydropneumatic cooling system (not shown in the drawing).
  • FIG. 2 shows the insulation obtained by forming small successive rooms 2a separated by crimps 2h.
  • FIG. 3 shows the small dies 4 producing the insulation shown in FIG. 2. These small dies have lateral guidance grooves 40, oblique drive grooves 4d, dividers 4e to produce crimps 2b and a partial cylinder 4fwhich determines the shape of the small rooms 2a.
  • FIG. 4 shows the complete moulding imprint that is constituted at the intake of the insulation forming machine by the juxtaposition and superimposing of the small dies 4- whose lateral grooves 40 assure guidance in the intake ramps 3 and the guides 9.
  • the oblique grooves 40 permit the precise relativepositioning and driving of the small dies 4 by means of two endless screws 5, whose rotation is synchronized and which are driven through suitable gears by a common electric motor (not shown in the drawing).
  • FIG. 5 shows a general view of the machine, according to the invention, which is composed essentially of two identical mountings G and H resting on baseplate J by means of columns 10 and 11 and each carrying i s own small die exchange mechanism (not entirely shown in this figure).
  • Baseplate .1 contains the motor and the driving mechanism of the machine (not shown).
  • upper mounting G can slide on columns 10 and 11.1,ongitudinal section of the lower mounting H is taken through the symmetry plane of the ingress ramps 8 and egress ramps 12. This section permits a description of the manner in which the small dies 4 circulate in the mountings G and H, absolutely identical, and the manner in which their exchange is accomplished inside these same mountings.
  • the small dies 4 are engaged by the endless screw 5 which ensures precise relative positioning and constant speed progression.
  • the small dies 4 mutually push each other, progressing into the egress ramp 12 before being engaged by a portion of an endless screw 13 whose pitch and speed are equal to that of screw 5.
  • This spring 17 has the effect of pressing the small dies against each other during their travel around the ingress ramp 8 until their engagement with screw 5.
  • FIG. 6 shows a schematic view of one of the two small dies exchange mechanisms, in the present case the one in lower mounting H, showing in particular the barrel 15 whose axis is parallel to the direction of movement of the small dies 4.
  • This barrel comprises six regularly distributed small longitudinal chambers each holding three small dies in reserve.
  • the electro-magnet 18, activated by an electrical impulse delivered by the random pulse generator 18a commences to push lever 19.
  • lever 19 commences to press against spring bolt 20.
  • bolt 20 in turn rapidly tilts part 21 which comprises two nut sectors 21k and 21m.
  • the nut sector 21k then commences to grip screw 22 whose pitch and rotational speed are equal to those of screws 13 and 5 which ensure the drive of the small dies. Part 21 then commences a longitudinal displacement movement at the same speed as the feed of the small dies 4. Part 21 then drives with itself slotted sleeve 29 and barrel 15 which operate as a single part as far as translation motion only is considered. Simultaneously, lever 19, in tilting, has rotated the splined shaft 23 which, by the intervention of toothed sectors 24 and 25, has activated lever 26, commanding simultaneous lateral displacement of helicoidal ramp 27 and rectilinear ramp 28.
  • Helicoidal ramp 27 then commences to interlock on one of the six studs 15m on the barrel while the rectilinear ramp 28 moves away from the stud which is diametrically opposite.
  • the lateral movement of the barrel 15 is therefore also accompanied by a rotational movement (60 in the case shown). This rotational movement will bring about the replacement of three small dies in the course of their lateral circulation by three other small dies held in reserve in the neighboring chamber.
  • Lever 19 follows the longitu dinal motion of barrel 15 by means of the slotted sleeve 29 entrapping part 21.
  • the electrical impulses sent to the electro-magnet commanding the exchange of dies in the one mounting are independent of those sent to the electro-magnet commanding the exchange in the other mounting.
  • the impulses should be delivered to the two electro-magnets by different pulse sources. These sources generate pulses at random times independently of each other and may be of any known type, for instance that described in the French Pat. No. 1,179,592.
  • An electro-mechanical security device permits activation of the lever 19 only when the barrel 15 is in the start position (position shown in FIG. 6).
  • FIG. 7 shows a second type of insulation forming machine intended for insulations larger in diameter than 10 mm.
  • This machine is characterized by the fact that it comprises three mountings P; Q, R resting on a baseplate S, supported by columns 32.
  • the three mountings P; Q, R are identical to each other and also to the mountings G and H of the above-described machine. In particular, they each contain their own small die 4 exchange mechanism. This arrangement permits forming larger diameter insulations and reducing the weight of the small dies 4.
  • the above-described types of machines for insulation forming can have their principle extended to all kinds of centering elements made of thermoplastic material and molded directly on the center conductor of the coaxial pair.
  • a machine for forming the between-conductor insulation of a coaxial conductor pair for the transmission of high frequency electric signals means for extruding around said inner conductor a thin tube of thermoplastic material and for constricting said tube at periodically spaced points along said inner conductor, said means including a succession of substantially identical small dies forming at least one endless chain driven at a constant linear speed by endless screws, part of said dies being pressed against said tube up to contact thereof with said inner conductor, the improvement consisting in that the successive dies in each chain freely contact each other and are mechanically independent of each other and move in endless slides, and in that said machine includes in each chain an exchange mechanism for replacing at random time intervals a small number of succeeding dies by an equal number of similar dies taken out from a reserve magazine, the exchanging being effected without stopping the operation of the machine and being controlled by electric pulses generated at random times by a random pulse generator.
  • said exchange mechanism includes a barrel (15, FIG. 6) containing said reserve magazine and comprising a plurality of chambers each containing said small number of dies, said mechanism further ineluding means (18) (19) (20) (21) controlled by said pulses from said generator (18a) for imparting said barre] (15) a translation motion and a rotation motion from a rest position, and means (30) for bringing back said barrel (15) to said rest position.
  • each of said chains is driven by an endless screw (5, FIG. 1), the axis of which is parallel to the motion direction of said inner conductor and the pitch of which is much smaller than the halfwavelength measured along the coaxial pair for the maximum frequency of the signals to be transmitted thereon.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
US413023A 1972-12-13 1973-11-05 Machines for forming insulation for high frequency transmitting coaxial lines Expired - Lifetime US3881851A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7244276A FR2210022B1 (enrdf_load_stackoverflow) 1972-12-13 1972-12-13

Publications (1)

Publication Number Publication Date
US3881851A true US3881851A (en) 1975-05-06

Family

ID=9108598

Family Applications (1)

Application Number Title Priority Date Filing Date
US413023A Expired - Lifetime US3881851A (en) 1972-12-13 1973-11-05 Machines for forming insulation for high frequency transmitting coaxial lines

Country Status (4)

Country Link
US (1) US3881851A (enrdf_load_stackoverflow)
JP (1) JPS5828687B2 (enrdf_load_stackoverflow)
CA (1) CA1007017A (enrdf_load_stackoverflow)
FR (1) FR2210022B1 (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005970A (en) * 1975-02-03 1977-02-01 Wavin B.V. Apparatus for continuously producing seals in tube-shaped plastics film material
US4021178A (en) * 1975-01-13 1977-05-03 Frankische Isolierrohr-Und Metallwarenwerke Gebr. Kirchner Apparatus for making tubing from thermoplastic synthetic material
US4325685A (en) * 1980-09-12 1982-04-20 Lupke Manfred Arno Alfred Apparatus for producing thermoplastic tubing having interchangeable mold blocks
US4504206A (en) * 1982-01-21 1985-03-12 Lupke Manfred Arno Alfred Chainless mold drive for a corrugator or the like
WO1987005857A1 (en) * 1986-03-24 1987-10-08 Uponor N.V. A method and an apparatus for the production of pipes
US5171500A (en) * 1989-10-27 1992-12-15 Uponor N.V. Pipe manufacturing line
CN1057724C (zh) * 1994-05-06 2000-10-25 曼夫瑞德·A·A·鲁波克 具有分离的模块的移动模
WO2000067980A1 (en) * 1999-05-07 2000-11-16 Lupke Manfred Arno Alfred Molding apparatus with mold block replacement system
WO2001023159A1 (de) * 1999-09-29 2001-04-05 Unicor Gmbh Rahn Plastmaschinen Vorrichtung zum herstellen von rohren mit querprofilierter wandung
WO2002042052A1 (de) * 2000-11-24 2002-05-30 Gottlieb Binder Gmbh & Co Verfahren zum fortlaufenden herstellen von haftverschlussteilen
EP1044775A3 (de) * 1999-04-01 2002-08-28 FRÄNKISCHE ROHRWERKE, GEBR. KIRCHNER GmbH & Co. Wechselcorrugator
EP2933801A4 (en) * 2012-12-14 2016-03-09 Autonetworks Technologies Ltd COATED INSULATED WIRE AND METHOD FOR THE PRODUCTION THEREOF
WO2018091166A1 (de) * 2016-11-16 2018-05-24 Leoni Kabel Gmbh Verfahren sowie vorrichtung zur herstellung eines strangguts
US10384403B2 (en) * 2014-12-17 2019-08-20 Leoni Kabel Gmbh Method for producing an electrical line, tool mould for such a method, and line

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2315155A2 (fr) * 1975-06-20 1977-01-14 Lignes Telegraph Telephon Procede de fabrication de cables coaxiaux et machine de mise en oeuvre
FR2477952A1 (fr) * 1980-03-14 1981-09-18 Cables De Lyon Geoffroy Delore Machine de fabrication de pieces d'apport en forme de disques sur une tige

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2760228A (en) * 1952-02-19 1956-08-28 Telecommunications Sa Manufacture of tubular insulators for electric conductors
US3188690A (en) * 1959-02-21 1965-06-15 Fraenk Isolierrohr & Metall Apparatus for the production of corrugated tubes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2760228A (en) * 1952-02-19 1956-08-28 Telecommunications Sa Manufacture of tubular insulators for electric conductors
US3188690A (en) * 1959-02-21 1965-06-15 Fraenk Isolierrohr & Metall Apparatus for the production of corrugated tubes

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021178A (en) * 1975-01-13 1977-05-03 Frankische Isolierrohr-Und Metallwarenwerke Gebr. Kirchner Apparatus for making tubing from thermoplastic synthetic material
US4005970A (en) * 1975-02-03 1977-02-01 Wavin B.V. Apparatus for continuously producing seals in tube-shaped plastics film material
US4325685A (en) * 1980-09-12 1982-04-20 Lupke Manfred Arno Alfred Apparatus for producing thermoplastic tubing having interchangeable mold blocks
US4504206A (en) * 1982-01-21 1985-03-12 Lupke Manfred Arno Alfred Chainless mold drive for a corrugator or the like
WO1987005857A1 (en) * 1986-03-24 1987-10-08 Uponor N.V. A method and an apparatus for the production of pipes
US4952362A (en) * 1986-03-24 1990-08-28 Uponor N.V. Method and apparatus for the production of pipe
US5171500A (en) * 1989-10-27 1992-12-15 Uponor N.V. Pipe manufacturing line
CN1057724C (zh) * 1994-05-06 2000-10-25 曼夫瑞德·A·A·鲁波克 具有分离的模块的移动模
EP1044775A3 (de) * 1999-04-01 2002-08-28 FRÄNKISCHE ROHRWERKE, GEBR. KIRCHNER GmbH & Co. Wechselcorrugator
WO2000067980A1 (en) * 1999-05-07 2000-11-16 Lupke Manfred Arno Alfred Molding apparatus with mold block replacement system
WO2001023159A1 (de) * 1999-09-29 2001-04-05 Unicor Gmbh Rahn Plastmaschinen Vorrichtung zum herstellen von rohren mit querprofilierter wandung
US6641383B1 (en) 1999-09-29 2003-11-04 Unicor Gmbh Rahn Plastmaschinen Device for the production of tubes with transverse walls
WO2002042052A1 (de) * 2000-11-24 2002-05-30 Gottlieb Binder Gmbh & Co Verfahren zum fortlaufenden herstellen von haftverschlussteilen
EP2933801A4 (en) * 2012-12-14 2016-03-09 Autonetworks Technologies Ltd COATED INSULATED WIRE AND METHOD FOR THE PRODUCTION THEREOF
US10384403B2 (en) * 2014-12-17 2019-08-20 Leoni Kabel Gmbh Method for producing an electrical line, tool mould for such a method, and line
WO2018091166A1 (de) * 2016-11-16 2018-05-24 Leoni Kabel Gmbh Verfahren sowie vorrichtung zur herstellung eines strangguts
CN110087853A (zh) * 2016-11-16 2019-08-02 莱尼电缆有限公司 用于制造股状制品的方法和设备
US11289242B2 (en) * 2016-11-16 2022-03-29 Leoni Kabel Gmbh Method and apparatus for producing an extrudate

Also Published As

Publication number Publication date
JPS5047181A (enrdf_load_stackoverflow) 1975-04-26
DE2359026A1 (de) 1974-06-27
JPS5828687B2 (ja) 1983-06-17
FR2210022B1 (enrdf_load_stackoverflow) 1977-09-02
CA1007017A (en) 1977-03-22
FR2210022A1 (enrdf_load_stackoverflow) 1974-07-05
DE2359026B2 (de) 1975-07-31

Similar Documents

Publication Publication Date Title
US3881851A (en) Machines for forming insulation for high frequency transmitting coaxial lines
US3349156A (en) Method for the production of corrugated tubes
EP0061247B1 (en) Method of making low crosstalk ribbon cable
US3188690A (en) Apparatus for the production of corrugated tubes
US3473986A (en) Method and apparatus for producing sheathed electric cable
US2778059A (en) Methods of and apparatus for making insulated multiconductor wire
US2566846A (en) Apparatus for insulating conductors
DE3363478D1 (en) Device for producing an electric and/or optical cable
DE3071451D1 (en) Process for producing a rough electrically insulating foil of polypropylene
US4011118A (en) Method of manufacturing a coaxial cable, and coaxial cable made by this method
US4510110A (en) High efficiency, fast extruders for extruding and refining soap and detergents
US2990672A (en) Method of and apparatus for producing communication cables
US4159300A (en) Method for manufacturing connectors in strip form
US2897542A (en) Apparatus for forming coaxial cables
RU2002108345A (ru) Машина для сборки шин с прижимными блоками
US4080148A (en) Method and apparatus for manufacturing connectors attached together on a continuous carrier strip
US5061338A (en) Device for manufacturing curved strips including a barrel cam for discontinuous displacement of the curved strips
US1689206A (en) Apparatus for treating vulcanizable material
US3441459A (en) Method and apparatus for making endless reinforced wrapped plastic tubing
RU98107805A (ru) Способ изготовления трубчатых изделий из композиционных материалов методом намотки и устройство для его осуществления
US2092487A (en) Concentric conductor electric cable
US3066353A (en) Apparatus for making plastic articles
DE3564216D1 (en) Apparatus and process for extruding dough as used in producing crisp breads
US3035307A (en) Apparatus to manufacture slide fastener elements
US3895992A (en) Apparatus for manufacturing foamed plastic