EP0770726A1 - Câble d'acier à plusieurs torons - Google Patents
Câble d'acier à plusieurs torons Download PDFInfo
- Publication number
- EP0770726A1 EP0770726A1 EP96202786A EP96202786A EP0770726A1 EP 0770726 A1 EP0770726 A1 EP 0770726A1 EP 96202786 A EP96202786 A EP 96202786A EP 96202786 A EP96202786 A EP 96202786A EP 0770726 A1 EP0770726 A1 EP 0770726A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strands
- strand
- cord
- steel cord
- diameter
- 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.)
- Granted
Links
Images
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
- D07B1/0613—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the rope 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
- D07B3/08—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material in which the take-up reel rotates 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 rope or cable on the take-up reel in fixed position and the supply reels are fixed in position
- D07B3/10—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material in which the take-up reel rotates 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 rope or cable on the take-up reel in fixed position and the supply reels are fixed in position with provision for imparting more than one complete twist to the ropes or cables for each revolution of the take-up reel or of the guide member
-
- 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
- D07B2207/204—Double twist winding
- D07B2207/205—Double twist winding comprising flyer
-
- 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
- D07B2207/207—Sequential double twisting devices
Definitions
- the present invention relates to a steel cord comprising a number of strands twisted together, which is a so-called multi-strand steel cord.
- multi-strand steel cords were the standard cords for reinforcing elastomeric products such as rubber tires, conveyor belts, transmission belts.
- multi-strand steel cords are still common in reinforcing heavy tires such as off-the-road tires, conveyor belts, timing belts and transmission belts.
- Most multi-strand steel cords are manufactured in an expensive way the last steps of which may be summarized as follows :
- a steel cord which comprises eight or more strands twisted together.
- Each of the strands has a substantially same cord twisting direction and a substantially same cord twisting pitch.
- Each of said strands consists of two to five individual filaments twisted together.
- the terms "cord twisting pitch" refer to the axial distance required to make a 360 degree revolution of a strand in the final cord.
- the fact that the strands have the same cord twisting direction and the same cord twisting pitch allows the multi-strand steel cord to be made in an economical and highly efficient way.
- the fact that each of the strands consists of only two to five individual filaments and, as a consequence, comprises no core filament allows to make the multi-strand steel cord without experiencing problems of core filament migration in the individual strands.
- the individual steel filaments of every strand have the same strand twisting direction and substantially the same strand twisting pitch.
- strand twisting pitch refer to the axial distance required to make a 360 degree revolution of a filament in a strand of the final cord.
- the number of strands in the multi-strand steel cord according to the invention is at least eight, and can be nine, twelve,fifteen... in order to provide for a suitable alternative for the prior art cord constructions 7x7, 7x19, 7x31.
- Preferable configurations comprise twelve, nineteen or twenty-seven strands and are respectively designated by 12xn-, 19xn- and 27xn-cords, where n is the number of filaments in each strand and ranges from two to five.
- a 12xn-cord has three center strands and nine outer strands.
- a 19xn-cord has one center strand, six intermediate strands and twelve outer strands.
- a 27xn-cord has three center strands, nine intermediate strands and fifteen outer strands.
- the center strand or center strands In order to prevent the center strand or center strands from migrating out of the cord under the influence of repeated external bending forces, it is preferable that the center strand or center strands have a larger diameter than the diameter of the outer strands and/or intermediate strands.
- the strand twisting direction may be equal to or opposite to the cord twisting direction.
- the strand twisting pitch may be equal to or different from the cord twisting pitch.
- the multi-strand steel cord is preferably adapted to reinforce elastomeric products, which means that it has either alone or in combination one or more of following properties :
- the multi-strand cord according to the invention may have been covered with a synthetic material such as polyamide.
- FIGURE 1 shows a transversal cross-section of a 12x2 multi-strand steel cord 10.
- the cord 10 comprises three center strands 12 and nine outer strands 14.
- Each of the center strands 12 and each of the outer strands 14 consists of only two filaments 16.
- Each of the the center 12 and each of the outer strands 14 have the same cord twisting pitch and same cord twisting direction in the final cord 10, for example :
- FIGURE 2 shows a transversal cross-section of a 12x3 multi-strand steel cord.
- Steel cord 10 comprises three center strrands 12 and nine outer strands 14.
- the diameter of the center strands 12 is somewhat larger than the diameter of the outer strands 14 because the filaments 18 of the center strands have a filament diameter that is larger than the filaments 16 of the outer strands.
- An example is as follows :
- FIGURE 3 shows a cross-section of another embodiment cord which comprises also three center strands 12 and nine outer strands 14.
- the center strands 18 have a diameter larger than the diameter of the outer strands 18 by the fact that they consist of three filaments 18 while the outer strands 14 consist only of two filaments 16.
- the filaments 18 of the center strands and the filaments 16 of the outer strands have an equal diameter.
- An example is :
- FIGURE 4 shows a cross-section of a 19x4 multi-strand steel cord 10.
- the cord comprises one center strand 12, six intermediate strands 20 and twelve outer strands 14.
- Each of the strands consists of four filaments.
- the four filaments of the center strand 12 have a diameter that is somewhat larger than the diameter of the filaments of the intermediate strands 20 and outer strands 14.
- FIGURE 5 shows a cross-section of a 27x2 multi-strand steel cord 10.
- the cord comprises three center strands 12, nine intermediate strands 20 and fifteen outer strands 14.
- Each of the strands consists of two filaments.
- the two filaments 18 of the center strand 12 have a diameter that is somewhat larger than the diameter of the filaments 16 of the intermediate strands 20 and outer strands 14.
- the multi-strand steel cords according to the invention may be used to replace the common multi-strand steel cords without loss in breaking load or in other mechanical properties.
- FIGURE 6 illustrates how a 12x3 multi-strand steel cord according to the invention can be made in one single cord making step, thus avoiding the multiple steps of making the individual strands.
- three individual filaments 16 are drawn from one supply spool 22 or from three separate supply spools 22.
- the filaments 16 are guided via a reversing pulley 23, over a flyer 24 to a guiding pulley 25.
- Flyer 24 rotates at a rotational speed n RAD and gives to the filaments 16 two twists per rotation so that a (provisional) strand 14 is made. This is done twelve times simultaneously.
- the whole set of twelve supply spools 22 and the corresponding flyers 24 form a so-called rotating pay-off installation.
- the twelve provisional strands are brought together at an assembly point 26 and are guided to a false twister 28 which rotates at twice the rotational speed n B of a downstream double-twister.
- the function of this false twister 28 is to draw the exact lengths of the strands they need in the final cord since at the level of false twister 28 the cord temporarily reaches its final cord twisting pitch.
- the assembled strands are led via a guiding pulley 30, over a flyer 32 and a reversing pulley 34 and are eventually wound on a spool 36.
- Flyer 32 rotates at a rotational speed n B , gives two twists per rotation to the assembled strands and lays down the final cord twisting pitch of multi-strand cord 10 and also (together with rotating flyers 24) the final strand twisting pitch.
- This second example illustrates an advantageous embodiment of the multi-strand cord according to the invention. If the cord twisting direction and the strand twisting direction are equal, the twists given by the flyers of the rotating pay-off installation are added to the twists given by the flyer of the double-twister so that the final twists are obtained with a minimum of twisting energy (compare the much higher rotational speeds of the first example with the rotational speeds of the second example !).
- the rotational speed n RAD of the flyers of the rotating pay-off installation is in any way different from the rotational speed n B of the flyer of the double-twister in order to avoid a situation where the twists given by the flyers of the rotating pay-off installation would be hundred per cent compensated by the twists given by the flyer of the double-twister, which would result in steel cords where the difference between the strands would disappear and result in so-called compact steel cords consisting only of filaments having the same cord twisting pitch and cord twisting direction which are equal to the strand twisting pitch and strand twisting direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19960202786 EP0770726B1 (fr) | 1995-10-27 | 1996-10-07 | Câble d'acier à plusieurs torons |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95202911 | 1995-10-27 | ||
EP95202911 | 1995-10-27 | ||
EP19960202786 EP0770726B1 (fr) | 1995-10-27 | 1996-10-07 | Câble d'acier à plusieurs torons |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0770726A1 true EP0770726A1 (fr) | 1997-05-02 |
EP0770726B1 EP0770726B1 (fr) | 2000-12-06 |
Family
ID=26139745
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19960202786 Expired - Lifetime EP0770726B1 (fr) | 1995-10-27 | 1996-10-07 | Câble d'acier à plusieurs torons |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0770726B1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3090704A1 (fr) * | 2018-12-19 | 2020-06-26 | Compagnie Generale Des Etablissements Michelin | Procédé de fabrication d’un câble multi-torons à deux couches |
FR3090703A1 (fr) * | 2018-12-19 | 2020-06-26 | Compagnie Generale Des Etablissements Michelin | Procédé de fabrication d’un câble multi-torons à deux couches |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR837683A (fr) * | 1937-03-11 | 1939-02-15 | Michelin & Cie | Perfectionnement aux enveloppes pour bandages pneumatiques |
FR997343A (fr) * | 1945-07-13 | 1952-01-04 | Dunlop Sa | Perfectionnements aux câbles applicables notamment aux enveloppes de bandages pneumatiques |
GB1209438A (en) * | 1968-02-12 | 1970-10-21 | Pirelli | Improvements in or relating to articles reinforced by metal cords |
EP0373595A1 (fr) * | 1988-12-16 | 1990-06-20 | Sumitomo Electric Industries, Ltd. | Câble en acier pour le renforcement de caoutchouc |
-
1996
- 1996-10-07 EP EP19960202786 patent/EP0770726B1/fr not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR837683A (fr) * | 1937-03-11 | 1939-02-15 | Michelin & Cie | Perfectionnement aux enveloppes pour bandages pneumatiques |
FR997343A (fr) * | 1945-07-13 | 1952-01-04 | Dunlop Sa | Perfectionnements aux câbles applicables notamment aux enveloppes de bandages pneumatiques |
GB1209438A (en) * | 1968-02-12 | 1970-10-21 | Pirelli | Improvements in or relating to articles reinforced by metal cords |
EP0373595A1 (fr) * | 1988-12-16 | 1990-06-20 | Sumitomo Electric Industries, Ltd. | Câble en acier pour le renforcement de caoutchouc |
Non-Patent Citations (1)
Title |
---|
327118: "Steel cord constructions made in one step", RESEARCH DISCLOSURE, no. 327, July 1991 (1991-07-01), EMSWORTH GB, pages 552 - 558, XP000258783 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3090704A1 (fr) * | 2018-12-19 | 2020-06-26 | Compagnie Generale Des Etablissements Michelin | Procédé de fabrication d’un câble multi-torons à deux couches |
FR3090703A1 (fr) * | 2018-12-19 | 2020-06-26 | Compagnie Generale Des Etablissements Michelin | Procédé de fabrication d’un câble multi-torons à deux couches |
Also Published As
Publication number | Publication date |
---|---|
EP0770726B1 (fr) | 2000-12-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5768874A (en) | Multi-strand steel cord | |
KR950005438B1 (ko) | 압축 강철 코오드 | |
US5784874A (en) | Multi-strand cord for timing belts | |
EP0143732B1 (fr) | Dispositif et procédé pour la fabrication d'une corde métallique | |
US4608817A (en) | Single strand metal cord and method of making | |
CN1202942A (zh) | 生产钢丝帘线的方法 | |
US5968651A (en) | Steel cord with differently waved filaments | |
CN1119230A (zh) | 具有多个绞合元件的钢丝绳或缆及其制造方法 | |
EP1381730B1 (fr) | Cable d'acier pour le renforcement d'articles en caoutchouc | |
EP0247663B1 (fr) | Construction de câblé métallique | |
US5592806A (en) | Non-wrapped non-sleeving compact cord | |
EP0770726B1 (fr) | Câble d'acier à plusieurs torons | |
US5512380A (en) | Steel cord construction | |
IE914457A1 (en) | Reinforced transmission belt | |
EP0675223A1 (fr) | Câble d'acier à plusieurs couches | |
EP0627520B1 (fr) | Câble d'acier compact sans fil de frettage | |
EP0635597A1 (fr) | Construction d'un câble d'acier | |
JP2906018B2 (ja) | ゴム補強用スチールコードおよびその製造法 | |
MXPA96005124A (en) | Ac cable | |
EP0811786B1 (fr) | Câble d'acier à plusieurs torons | |
EP0841430B1 (fr) | Câble d'acier avec filaments de formes ondulées différentes | |
KR100279565B1 (ko) | 상이한 꼬임밀도와 꼬임방향을 갖는 고무 보강용 스틸코드 및 그 제조장치 | |
EP0040877A1 (fr) | Câblé métallique comportant des torons à filaments parallèles | |
WO2023117589A1 (fr) | Câblé d'acier pour le renfort d'un produit élastomère | |
JP2920469B2 (ja) | ラジアルタイヤ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE DE ES FI FR GB IE IT LU NL |
|
17P | Request for examination filed |
Effective date: 19971022 |
|
17Q | First examination report despatched |
Effective date: 19980917 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE DE ES FI FR GB IE IT LU NL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20001206 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20001206 Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20001206 |
|
REF | Corresponds to: |
Ref document number: 197972 Country of ref document: AT Date of ref document: 20001215 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 69611149 Country of ref document: DE Date of ref document: 20010111 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
ET | Fr: translation filed | ||
ITF | It: translation for a ep patent filed |
Owner name: SOCIETA' ITALIANA BREVETTI S.P.A. |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2154383 Country of ref document: ES Kind code of ref document: T3 |
|
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20011007 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20011007 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20011008 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20011007 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060630 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20061013 Year of fee payment: 11 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20060630 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: D3 |
|
BERE | Be: lapsed |
Owner name: S.A. *BEKAERT N.V. Effective date: 20071031 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20071031 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20091026 Year of fee payment: 14 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20101027 Year of fee payment: 15 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20101028 Year of fee payment: 15 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20111118 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20101008 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20111028 Year of fee payment: 16 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20130628 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130501 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 69611149 Country of ref document: DE Effective date: 20130501 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20121007 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20121031 |