EP0675223A1 - Câble d'acier à plusieurs couches - Google Patents

Câble d'acier à plusieurs couches Download PDF

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Publication number
EP0675223A1
EP0675223A1 EP94200760A EP94200760A EP0675223A1 EP 0675223 A1 EP0675223 A1 EP 0675223A1 EP 94200760 A EP94200760 A EP 94200760A EP 94200760 A EP94200760 A EP 94200760A EP 0675223 A1 EP0675223 A1 EP 0675223A1
Authority
EP
European Patent Office
Prior art keywords
diameter
layer filaments
intermediate layer
steel cord
filaments
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Withdrawn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
EP94200760A
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German (de)
English (en)
Inventor
Marc Eggermont
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
Priority to EP94200760A priority Critical patent/EP0675223A1/fr
Publication of EP0675223A1 publication Critical patent/EP0675223A1/fr
Withdrawn legal-status Critical Current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
    • D07B1/0633—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration having a multiple-layer configuration
    • 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
    • D07B1/0646—Reinforcing cords for rubber or plastic articles comprising longitudinally preformed wires
    • D07B1/0653—Reinforcing cords for rubber or plastic articles comprising longitudinally preformed wires in the core

Definitions

  • the present invention relates to a steel cord for the reinforcement of rubber articles an to a rubber product, particularly a heavy truck tire the belt of which comprises such a steel cord.
  • 3+9+15-steel cord construction still keeps an important place despite a number of disadvantages and the existence of compact cords.
  • a particular example of a 3+9+15-construction is as follows : 3x0.22 + 9x0.22 + 15x0.22 + 1 S/S/Z/S 6.5/12/18/3.5
  • Such a construction has following disadvantages. It makes use of relatively small filament diameters, which increases the manufacturing cost in drawing. Apart from the winding of the wrapping filament, three individual twisting steps are needed to manufacture the final cord. The outer layer is twisted in a direction opposite to the twisting direction of the core and the intermediate layer.
  • a steel cord for the reinforcement of rubber articles.
  • the steel cord comprises a core filament with a first diameter d1, four or five intermediate layer filaments with a second diameter d2 and ten outer layer filaments with a third diameter d3.
  • the intermediate layer filaments surround the core filament and the outer layer filaments surround the intermediate layer filaments.
  • the first diameter is smaller than the second diameter and is greater than the diameter of the circle inscribed in the compact figuration of the cross-sections of the intermediate layer filaments in the case of no core filament.
  • This cord construction which is a 1+4+10-cord or a 1+5+10-cord, can be manufactured in two twist steps and has full rubber penetration.
  • intermediate layer filaments Four or five intermediate layer filaments are provided since the provision of only three intermediate layer filaments would lead to a less stable structure or to diameters of intermediate layer filaments which are too great with respect to fatigue resistance. The provision of six or more intermediate layer filaments would lead to diameters of intermediate layer filaments which are too small with respect to cost of drawing. Ten outer layer filaments are provided since the provision of only nine or less outer layer filaments would lead to a less stable structure or to diameters of outer layer filaments which are too great with respect to fatigue resistance. The provision of eleven or more outer layer filaments would lead to diameters of outer layer filaments which are too small with respect to cost of drawing.
  • the second diameter d2 is substantially equal to the third diameter d3. This avoids the use of three different filament diameters.
  • the direction of twisting of the intermediate layer filaments is preferably equal to the direction of twisting of the outer layer filaments. As explained hereabove with respect to a 3+9+15-construction, an equal direction of twisting also decreases the manufacturing cost if the technique of double-twisting is used.
  • the steel cord according to the present invention has a core filament with a wave form.
  • the pitch of the wave form is different from the twist pitch of the intermediate layer filaments.
  • This embodiment has the advantage of preventing the core filament from migrating out of the remaining steel cord filaments when put under alternating bending loads.
  • a heavy truck tire comprising one or more belt layers. At least one of the belt layers is reinforced with a steel cord according to the first aspect of the present invention.
  • FIGURE 1 shows the cross-section four intermediate layer filaments 10 contacting one another after the core filament has taken out from the center.
  • the four filaments 10 form a closed compact configuration.
  • another circle 12 contacting these circles can be inscribed in the center.
  • Circle 12 is called 'the circle inscribed in the compact figuration of the cross-sections of the intermediate layer filaments in case of no core filament'.
  • the diameter d1 of the core filament is substantially greater than the diameter of the inscribed circle 12, e.g. at least 5 % greater.
  • FIGURE 2 shows the transversal cross-section of a 1+4+10-cord 14 according to the present invention : a core filament 16 with a diameter of 0.175 mm is surrounded by four intermediate layer filaments 10 of diameter 0.28 mm which are on their turn surrounded by ten outer layer filaments 20 with diameter 0.28 mm.
  • This cord can be summarized as : 1x0.175 + 4x0.28 + 10x0.28 9/18 S/S which means that the twisting direction of the intermediate layer is equal to the twisting direction of the outer layer and that the twisting step p2 of the intermediate layer is half the value of the twisting step p3 of the outer layer.
  • FIGURE 3 shows the transversal cross-section of a 1+5+10+1-cord 14 according to the present invention.
  • a core filament 16 of a diameter 0.20 mm is surrounded by five intermediate layer filaments of a diameter 0.25 mm which are in their turn surrounded by ten outer layer filaments 20 of a diameter 0.25 mm.
  • a wrapping filament 24 of a diameter 0.15 mm may be wound around the outer layer either in the same twisting direction or in the other twisting direction of the outer layer.
  • This cord can be summarized by the following formula : 1x0.20 + 5x0.25 + 10x0.25 + 0.15 9/18/5 S/S/Z
  • FIGURE 4 partly shows the cross-section of a heavy truck tire 26 having belt layers 28, a carcass layer 30 and a bead reinforcement 32. At least one of the belt layers 28 is reinforced with steel cords 14.
  • a 1+4+10-cord or a 1+5+10-cord has mechanical properties which are comparable to prior art cords 3+9+15, 3+8 or to 3+9, but has - in contradistinction with the prior art cords - full rubber penetration.
  • a 1+4+10-cord according to the invention and four prior art steel cords have been embedded in two belt plies of a tire with size 315/80 R 22.5.
  • the width of the plies is 22 cm.
  • the length of the plies is 325 cm, the rubber compound gage is equal to 0.60 mm, and the required strength per dm is 270 000 N/dm.
  • the 1+4+10-cord is as follows :
  • the present invention is not limited to a particular steel composition, a particular tensile strength or a particular coating promoting the adhesion to rubber or increasing the corrosion resistance. In the same spirit is the present invention not limited to a particular plastical deformation of the core filament or of the intermediate layer or outer layer filaments.
  • the core filament can present following forms :

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  • Ropes Or Cables (AREA)
EP94200760A 1994-03-24 1994-03-24 Câble d'acier à plusieurs couches Withdrawn EP0675223A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP94200760A EP0675223A1 (fr) 1994-03-24 1994-03-24 Câble d'acier à plusieurs couches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94200760A EP0675223A1 (fr) 1994-03-24 1994-03-24 Câble d'acier à plusieurs couches

Publications (1)

Publication Number Publication Date
EP0675223A1 true EP0675223A1 (fr) 1995-10-04

Family

ID=8216728

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94200760A Withdrawn EP0675223A1 (fr) 1994-03-24 1994-03-24 Câble d'acier à plusieurs couches

Country Status (1)

Country Link
EP (1) EP0675223A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001049926A1 (fr) * 1999-12-30 2001-07-12 Societe De Technologie Michelin Cable d'acier multicouches pour carcasse de pneumatique
WO2002053827A1 (fr) * 2001-01-04 2002-07-11 Société de Technologie Michelin Cable d'acier multicouches pour armature de sommet de pneumatique
WO2003069055A1 (fr) * 2002-02-14 2003-08-21 N.V. Bekaert S.A. Cable d'acier compact
ES2215438A1 (es) * 1999-11-11 2004-10-01 Bridgestone Corporation Cable de acero para el refuerzo de un articulo de caucho y neumaticos.
US6962182B2 (en) 2001-01-04 2005-11-08 Michelin Rechlin Et Techerche S.A. Multi-layer steel cable for tire crown reinforcement
WO2011131383A1 (fr) * 2010-04-21 2011-10-27 Continental Reifen Deutschland Gmbh Pneumatique de véhicule
CN103298996A (zh) * 2011-01-10 2013-09-11 贝卡尔特公司 紧密型钢帘线
WO2015194893A1 (fr) * 2014-06-19 2015-12-23 고려제강 주식회사 Câble pour ascenseur et son procédé de fabrication
CN113123149A (zh) * 2021-04-22 2021-07-16 江苏兴达钢帘线股份有限公司 一种具有渗胶结构的钢帘线及其制备方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2080845A (en) * 1980-07-29 1982-02-10 Dunlop Ltd Metal cords for reinforcing elastomeric articles
US4781016A (en) * 1987-02-16 1988-11-01 Bridgestone Corporation Steel cords

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2080845A (en) * 1980-07-29 1982-02-10 Dunlop Ltd Metal cords for reinforcing elastomeric articles
US4781016A (en) * 1987-02-16 1988-11-01 Bridgestone Corporation Steel cords

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
316107: "Steel cord construction", RESEARCH DISCLOSURE, no. 316, August 1990 (1990-08-01), EMSWORTH GB, pages 681 *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2215438A1 (es) * 1999-11-11 2004-10-01 Bridgestone Corporation Cable de acero para el refuerzo de un articulo de caucho y neumaticos.
ES2215438B1 (es) * 1999-11-11 2005-12-16 Bridgestone Corporation Cable de acero para el refuerzo de un articulo de caucho y neumaticos.
WO2001049926A1 (fr) * 1999-12-30 2001-07-12 Societe De Technologie Michelin Cable d'acier multicouches pour carcasse de pneumatique
US6837289B2 (en) 1999-12-30 2005-01-04 Michelin Recherche Et Technique, S.A. Multi-layer steel cable for tire carcass
WO2002053827A1 (fr) * 2001-01-04 2002-07-11 Société de Technologie Michelin Cable d'acier multicouches pour armature de sommet de pneumatique
US6766841B2 (en) 2001-01-04 2004-07-27 Michelin Recherche Et Technique, S.A. Multi-layer steel cable for tire crown reinforcement
US6962182B2 (en) 2001-01-04 2005-11-08 Michelin Rechlin Et Techerche S.A. Multi-layer steel cable for tire crown reinforcement
WO2003069055A1 (fr) * 2002-02-14 2003-08-21 N.V. Bekaert S.A. Cable d'acier compact
WO2011131383A1 (fr) * 2010-04-21 2011-10-27 Continental Reifen Deutschland Gmbh Pneumatique de véhicule
US9315074B2 (en) 2010-04-21 2016-04-19 Continental Reifen Deutschland Gmbh Pneumatic vehicle tyre
CN103298996A (zh) * 2011-01-10 2013-09-11 贝卡尔特公司 紧密型钢帘线
CN103298996B (zh) * 2011-01-10 2016-01-06 贝卡尔特公司 紧密型钢帘线
CN103298996B8 (zh) * 2011-01-10 2019-12-03 贝卡尔特公司 紧密型钢帘线
WO2015194893A1 (fr) * 2014-06-19 2015-12-23 고려제강 주식회사 Câble pour ascenseur et son procédé de fabrication
US10443191B2 (en) 2014-06-19 2019-10-15 Kiswire Ltd. Rope for elevator and manufacturing method therefor
CN113123149A (zh) * 2021-04-22 2021-07-16 江苏兴达钢帘线股份有限公司 一种具有渗胶结构的钢帘线及其制备方法

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