US3774385A - Machines and methods for manufacturing ropes, in particular steel cords - Google Patents

Machines and methods for manufacturing ropes, in particular steel cords Download PDF

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Publication number
US3774385A
US3774385A US00200338A US3774385DA US3774385A US 3774385 A US3774385 A US 3774385A US 00200338 A US00200338 A US 00200338A US 3774385D A US3774385D A US 3774385DA US 3774385 A US3774385 A US 3774385A
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US
United States
Prior art keywords
cylinder
wires
strands
twisted
spool
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
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US00200338A
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English (en)
Inventor
M Maderna
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.)
Industrie Pirelli SpA
Pirelli and C SpA
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Pirelli SpA
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Filing date
Publication date
Application filed by Pirelli SpA filed Critical Pirelli SpA
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Publication of US3774385A publication Critical patent/US3774385A/en
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Classifications

    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0606—Reinforcing cords for rubber or plastic articles
    • D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B3/00—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material
    • D07B3/02—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material in which the supply reels rotate about the axis of the rope or cable or in which a guide member rotates about the axis of the rope or cable to guide the component strands away from the supply reels in fixed position
    • D07B3/04—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material in which the supply reels rotate about the axis of the rope or cable or in which a guide member rotates about the axis of the rope or cable to guide the component strands away from the supply reels in fixed position and are arranged in tandem along the axis of the machine, e.g. tubular or high-speed type stranding machine
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2207/00—Rope or cable making machines
    • D07B2207/20—Type of machine
    • D07B2207/202—Double twist unwinding

Definitions

  • cords are at present manufactured in two phases, carried out on two different machines.
  • the elementary wires are joined together usually by subjecting them to a double twist, in order to obtain perfectly balanced strands, on a doubletwisting" machine.
  • the various elementary wires are paid off from as many spools (placed on swinging supports provided inside a rotating cylinder), then they are brought on the outer surface of the cylinder, are moved away to one end of the latter along one of its generatrices, are transferred as far as the generatrix of the cylinder which is diametrically opposite to the preceding one, and at last are transferred,
  • each elementary wire is subjected to a first twist (cabling) between the feeding spool and the rotating cylinder, and to a second twist (stranding) in the same sense as the first, between the rotating cylinder and the fixed roller.
  • the second phase of the present manufacture of the cords comprises joining together the several strands 50 obtained by means of a stranding machine, which can also be of the doubletwisting type.
  • the object of this invention is to simplify the manufacture of cords of the equiverse type by reducing the number of required machines and by working according to a simpler method, with the result of obtaining a higher output and therefore a less expensive product.
  • the present invention relates to a method for manufacturing ropes, in particular steel cords of the equiverse type, which comprises winding up on a plurality of spools, corresponding to the number of rope strands to be obtained, as many groups of elementary wires parallel to one another, not twisted and in a number equal to that of the wires of each strand, characterized in that it comprises the following further steps, carried out continuously on a single machine of the so-called double-twisting type:
  • the present invention deals also with an improvement of the so-called double-twisting machine, so that it can carry out simultaneously the cabling and the stranding.
  • FIGURE represents 'diagrammatically the double-twisting machine, and with reference to the following description, which refers to an exemplary embodiment which is not intended to be limiting.
  • word strand indicates the joining of a certain number of helically wound wires (made of steel or of another material) irrespective of the number of such wires, provided that said number is not smaller than two.
  • the FIGURE shows spools I, 2, 3 swinging on appropriate supports (not illustrated) inside a cylinder 4, which is placed into rotation with known means (also not illustrated).
  • Each spool carries, wound about it, one group of steel wires, untwisted and parallel to one another.
  • Each group of wires 5, 6, 7 is conveyed from spools l, 2, 3 as far as the outer surface of cylinder 4.
  • the groups of wires pass through devices la, 2a, 3a intended to prevent backtwisting or untwisting, through bushingsv 1b, 2b, 3b arranged along the axis of cylinder 4 and through bushings 1c, 20, 3c arranged on the surface of the latter.
  • each group of wires is subjected to an individual but simultaneous cabling.
  • each group of wires forms a strand (respectively indicated as 5a, 6a, 7a), i.e., the strands are as many as the spools in the machine.
  • These strands constitute a bundle of strands which are guided, in parallel relationship with one another, at first along the outer surface of cylinder 4 to the eyelet 8, and then as far as roller 9.
  • roller 9 The axis of roller 9 is perpendicular to that of cylinder 4; moreover said roller rotates together with said cylinder 4.
  • the bundle of strands 13 is subjected to a stranding, from roller 9 onwards, because it passes through the eyelets l0, 11, also provided on the outer surface of cylinder 4, and then passes through bushing 12, whose axis is parallel to the axis of cylinder 4, but is fixed with respect to the latter.
  • This stranding is characterized in that it is a second twisting, having the same sense as the cabling, imparted to each of the wires constituting the strands.
  • the cord so formed passes through an equalizer l5 and a capstan 16 as is already known, and is then guided and wound up about a drum 17.
  • the equalizer 15, about the pulleys of which the cord 14 is compelled to follow a travel in the figure of a complete eight, is kept in rotation with means not illustrated. In this way, a certain number of twists per meter is imparted to the cord, which is sufficient to make it inert.
  • the strands constituting bundle 13 are represented as separate from one another; actually they are parallel and closely adjacent.
  • the present invvention includes also any modification accessible to a technician of the art and deriving from the above indicated inventive principles
  • bushings lc, 21:, 3c can be arranged along several generatrices of the rotating cylinder 4, instead of being arranged along only one generatrix, as shown in the FIGURE.
  • An apparatus for making a cord of the equiverse type comprising a plurality of spools for winding a plurality of wires in parallel relationship thereabout;
  • a cylinder disposed about said spools and adapted to be rotated thereabout; said cylinder having a separate opening in its sidewall for passage of each group of wires from each spool to the outside of the cylinder;
  • each spool for looping the wires as they are unwound from the spool and means for guiding the resulting strand of twisted wires from the looping means through one of said openings;
  • a bushing having its axis parallel to that of the cylinder but which is stationary with respect to the cylinder for guiding the strands as they are twisted once about each other from the rotating cylinder, an equalizer downstream of the said bushing; and means for winding the resulting cord.
  • said means for guiding the wires from the looping means through one of said openings is a first bushing having its axis parallel to the longitudinal axis of the cylinder and a second bushing in the opening;
  • the means for guiding and orienting the strands carried externally by the cylinder are a pair of 'circumferentially spaced bushings adjacent to one end of the cylinder, a roller carried by the cylinder at a first end thereof and disposed between the said spaced bushings having its axis perpendicular with the longitudinal axis of the cylinder;
  • the said stationary bushing is disposed at a second end of the cylinder, an equalizer, a capstan and a drum for winding the resulting cord thereabout are disposed in that order downstream of the stationary bushing.
  • a method for forming a cord having a plurality of wire twisted once to form a strand and a plurality of the strands are twisted once in the same sense as the wires are twisted which comprises unwinding a plurality of wires disposed in parallel relationship on a spool, guiding the wires through the sidewall of a cylinder rotating about the spool, disposing the resulting once twisted wires as strands in parallel relationship to form a bundle thereof and passing the strands through a guide means stationary with respect to the cylinder whereby the strands are twisted once into a cord.

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  • Ropes Or Cables (AREA)
US00200338A 1970-12-04 1971-11-19 Machines and methods for manufacturing ropes, in particular steel cords Expired - Lifetime US3774385A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT3263070 1970-12-04

Publications (1)

Publication Number Publication Date
US3774385A true US3774385A (en) 1973-11-27

Family

ID=11235545

Family Applications (1)

Application Number Title Priority Date Filing Date
US00200338A Expired - Lifetime US3774385A (en) 1970-12-04 1971-11-19 Machines and methods for manufacturing ropes, in particular steel cords

Country Status (7)

Country Link
US (1) US3774385A (enrdf_load_stackoverflow)
BE (1) BE775643A (enrdf_load_stackoverflow)
CA (1) CA951980A (enrdf_load_stackoverflow)
DE (1) DE2159064A1 (enrdf_load_stackoverflow)
FR (1) FR2117153A5 (enrdf_load_stackoverflow)
GB (1) GB1346622A (enrdf_load_stackoverflow)
IE (1) IE35860B1 (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE29599E (en) * 1973-06-28 1978-03-28 Honeywell Inc. Control circuit for photographic apparatus
DE3109756A1 (de) * 1980-04-25 1982-01-28 Char'kovskij politechničeskij institut imeni V.I. Lenina, Charkov Vertikale verseilmaschine
US4335571A (en) * 1978-05-09 1982-06-22 Industrie Pirelli S.P.A. Apparatus for cabling wires
US4495759A (en) * 1983-10-05 1985-01-29 The Goodyear Tire & Rubber Company Manufacture of metallic cable
US4856267A (en) * 1988-11-25 1989-08-15 Northern Telecom Limited Method and apparatus for twisting together lengths of filamentary material

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU79218A1 (fr) * 1978-03-13 1979-10-29 Bekaert Sa Nv Cordage metallique de renforcement et son mode de fabrication
JPS55136534A (en) * 1979-04-13 1980-10-24 Tokyo Seikou Kk Production of steel cord

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1360663A (fr) * 1962-06-20 1964-05-08 Bekaert Pvba Leon Perfectionnement aux câbles en fils d'acier
US3585792A (en) * 1968-02-14 1971-06-22 Vornbaeumen & Co E Method and machine for manufacturing cables
US3726074A (en) * 1969-06-02 1973-04-10 Bekaert Sa Nv Method and apparatus for manufacture of strands and cables

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1360663A (fr) * 1962-06-20 1964-05-08 Bekaert Pvba Leon Perfectionnement aux câbles en fils d'acier
US3585792A (en) * 1968-02-14 1971-06-22 Vornbaeumen & Co E Method and machine for manufacturing cables
US3726074A (en) * 1969-06-02 1973-04-10 Bekaert Sa Nv Method and apparatus for manufacture of strands and cables

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE29599E (en) * 1973-06-28 1978-03-28 Honeywell Inc. Control circuit for photographic apparatus
US4335571A (en) * 1978-05-09 1982-06-22 Industrie Pirelli S.P.A. Apparatus for cabling wires
DE3109756A1 (de) * 1980-04-25 1982-01-28 Char'kovskij politechničeskij institut imeni V.I. Lenina, Charkov Vertikale verseilmaschine
US4495759A (en) * 1983-10-05 1985-01-29 The Goodyear Tire & Rubber Company Manufacture of metallic cable
US4856267A (en) * 1988-11-25 1989-08-15 Northern Telecom Limited Method and apparatus for twisting together lengths of filamentary material

Also Published As

Publication number Publication date
CA951980A (en) 1974-07-30
IE35860B1 (en) 1976-06-09
DE2159064A1 (de) 1972-06-15
GB1346622A (enrdf_load_stackoverflow) 1974-02-13
FR2117153A5 (enrdf_load_stackoverflow) 1972-07-21
IE35860L (en) 1972-06-04
BE775643A (fr) 1972-03-16

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