EP0110437A1 - Zusammengesetztes Verstärkungsseil für Elastomererzeugnisse - Google Patents

Zusammengesetztes Verstärkungsseil für Elastomererzeugnisse Download PDF

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Publication number
EP0110437A1
EP0110437A1 EP83201453A EP83201453A EP0110437A1 EP 0110437 A1 EP0110437 A1 EP 0110437A1 EP 83201453 A EP83201453 A EP 83201453A EP 83201453 A EP83201453 A EP 83201453A EP 0110437 A1 EP0110437 A1 EP 0110437A1
Authority
EP
European Patent Office
Prior art keywords
pitch
wires
cord
strands
group
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Withdrawn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
EP83201453A
Other languages
English (en)
French (fr)
Inventor
Pierre Vancolen
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.)
Bekaert NV SA
Original Assignee
Bekaert NV SA
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 Bekaert NV SA filed Critical Bekaert NV SA
Publication of EP0110437A1 publication Critical patent/EP0110437A1/de
Withdrawn legal-status Critical Current

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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
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2022—Strands coreless
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2024—Strands twisted
    • D07B2201/2029—Open winding
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2059—Cores characterised by their structure comprising wires
    • D07B2201/206—Cores characterised by their structure comprising wires arranged parallel to the axis

Definitions

  • the invention relates to a steel cord for the reinforcement of an elastomer material, such as rubber, and comprising at least two strands.
  • These strands can be arranged in the cord, e. g. as a given number n of strands which are twisted all together, the one around the other ones for forming helicoids of substantially same diameter and pitch.
  • These strands can also be arranged in the form of one strand forming the core, and a layer of strands running helicoidally around the core strand.
  • strands were used in the form of a group of m wires, which are twisted together and which form helicoids of same diameter and pitch, such as the strands 3 x 0.15 (3 wires of 0.15 mm diameter), 4 x 0.175, 4 x 0.22, having a pitch ranging from 15 to 25 millimeter. These strands are then twisted together into a cord, e.g. one core strand with six strands around it (7 strands of 3 or 4 wires each, i.e. a cord 7 x 3 or 4) or a cord having three strands twisted around each other (cord 3 x 3 or 4).
  • a cord e.g. one core strand with six strands around it (7 strands of 3 or 4 wires each, i.e. a cord 7 x 3 or 4) or a cord having three strands twisted around each other (cord 3 x 3 or 4).
  • this is obtained by using a special type strand, of which the structure is sufficiently round and compact to be used as a strand for forming a cord of acceptable diameter and roundness.
  • each strand comprises two groups of wires, these groups being twisted around each other such as to form helicoids of about the same form, the wires of the first group having a pitch of more than 300 mm, and the wires of the second group having a pitch in the same sense and of the same value as the pitch of said helicoids.
  • the number of wires of the second group is equal to the number of wires of the first group and ranges from two to four, preferably two.
  • the twist pitch of the wires in the first group will preferably have an infinite value, such as to form in the strand a bundle of parallel wires.
  • the wires have in general a diameter ranging from 0.10 to 0.40 mm.
  • the strand used in the test explained hereunder, is shown in detail in Figure 1. It comprises a first group of two wires 1 and a second group of two wires 2. The two groups are twisted together the one around the other into helices having a pitch p.
  • Figure 1 shows a side view and four'sections, taken at a quarter of a pitch distance from each other.
  • the wires 1 of the first group have no twist around each other, and the wires 2 of the second group show a twist pitch p around each other and in the same sense and with the same twist pitch.
  • a group of parallel wires 1 it is also possible to use a group of wires, twisted with a very high pitch, e.g. above 300 mm. Such strand is indicated by the symbol "2+2".
  • Seven strands 2+2 of the type shown in Figure 1, are then used in a 7 x (2+2)-cord, as shown in Figure 2, in which the pitch q of the strands in the cord is in opposite sense of the pitch p of the groups of wires in the strands.
  • the pitch q of the strands along the cord is to determine with respect to a direction AA which remains fixed along the cable.
  • the pitches p and q have in general a value between 5 and 30 mm, preferably q about 10 mm and p about 20 mm.
  • Such cord is called a 7 x (2+2)-cord having the pitches "10/20".
  • cords can be made of the same type, for instance 3 x (2+2)-cords or others.
  • a conventional 7x4 or 3x4-cord is in general further enveloped with a wire that helicoidally runs around the cable with a rather short pitch of about half or one third of the pitch of the strands and in a sense opposite to the pitch of the strands.
  • This can also be done in a cord according to the invention, which is then called a 7 x (2+2) + 1-cord or a 3 x (2+2) + 1-cord having a pitch "q/p/r", r being the pitch, in mm, of the enveloping wire.
  • the stiffness has been measured over a length section of 70 mm.
  • the necessary bending moment M o is measured to incurve the length section by 15° over its length. Then the necessary bending moment M' o is measured to bring the specimen back to the straight form.
  • the measurement is done according to the method of Taber and the moments are measured in Taber units (T.S.U.). With the specimen of 70 mm used, one Taber unit corresponds to 98,1 x 10-3 Nmm.
EP83201453A 1982-10-22 1983-10-11 Zusammengesetztes Verstärkungsseil für Elastomererzeugnisse Withdrawn EP0110437A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU84435 1982-10-22
LU84435A LU84435A1 (fr) 1982-10-22 1982-10-22 Cable compose pour remplacement d'elastomeres

Publications (1)

Publication Number Publication Date
EP0110437A1 true EP0110437A1 (de) 1984-06-13

Family

ID=19729969

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83201453A Withdrawn EP0110437A1 (de) 1982-10-22 1983-10-11 Zusammengesetztes Verstärkungsseil für Elastomererzeugnisse

Country Status (3)

Country Link
EP (1) EP0110437A1 (de)
JP (1) JPS59204992A (de)
LU (1) LU84435A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2569143A1 (fr) * 1984-08-14 1986-02-21 Bridgestone Corp Armature pour caoutchouc
EP0430851A1 (de) * 1989-11-07 1991-06-05 The Goodyear Tire & Rubber Company Reifen mit Gürtelverstärkung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02175983A (ja) * 1988-12-28 1990-07-09 Yokohama Rubber Co Ltd:The ラジアルタイヤおよびタイヤ補強用スチールコード
ZA901611B (en) * 1989-04-03 1990-12-28 Bekaert Sa Nv Steel cord with improved fatigue strength

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE622904A (de) *
FR997343A (fr) * 1945-07-13 1952-01-04 Dunlop Sa Perfectionnements aux câbles applicables notamment aux enveloppes de bandages pneumatiques
US2900785A (en) * 1956-05-18 1959-08-25 United States Steel Corp Six-wire strand
EP0040877A1 (de) * 1980-05-26 1981-12-02 Gencord S.p.A. Metalldrahtseil mit Litzen paralleler Drähte
LU84130A1 (fr) * 1981-05-08 1982-09-13 Bekaert Sa Nv Cable en acier pour le renforcement d'une matiere elastomere,notamment pour bandages pneumatiques
DE2619086C2 (de) * 1975-05-12 1982-10-28 Akzo Gmbh, 5600 Wuppertal Verstärkungsseil für Elastomererzeugnisse, Verfahren und Vorrichtung zur Herstellung
EP0092696A2 (de) * 1982-04-26 1983-11-02 Akzo GmbH Verstärkungsseil für elastomere Erzeugnisse

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE622904A (de) *
FR997343A (fr) * 1945-07-13 1952-01-04 Dunlop Sa Perfectionnements aux câbles applicables notamment aux enveloppes de bandages pneumatiques
US2900785A (en) * 1956-05-18 1959-08-25 United States Steel Corp Six-wire strand
DE2619086C2 (de) * 1975-05-12 1982-10-28 Akzo Gmbh, 5600 Wuppertal Verstärkungsseil für Elastomererzeugnisse, Verfahren und Vorrichtung zur Herstellung
EP0040877A1 (de) * 1980-05-26 1981-12-02 Gencord S.p.A. Metalldrahtseil mit Litzen paralleler Drähte
LU84130A1 (fr) * 1981-05-08 1982-09-13 Bekaert Sa Nv Cable en acier pour le renforcement d'une matiere elastomere,notamment pour bandages pneumatiques
EP0092696A2 (de) * 1982-04-26 1983-11-02 Akzo GmbH Verstärkungsseil für elastomere Erzeugnisse

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2569143A1 (fr) * 1984-08-14 1986-02-21 Bridgestone Corp Armature pour caoutchouc
EP0430851A1 (de) * 1989-11-07 1991-06-05 The Goodyear Tire & Rubber Company Reifen mit Gürtelverstärkung

Also Published As

Publication number Publication date
JPS59204992A (ja) 1984-11-20
LU84435A1 (fr) 1984-05-10

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19850214

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Inventor name: VANCOLEN, PIERRE