CN203498695U - Open steel cord - Google Patents
Open steel cord Download PDFInfo
- Publication number
- CN203498695U CN203498695U CN201190000841.2U CN201190000841U CN203498695U CN 203498695 U CN203498695 U CN 203498695U CN 201190000841 U CN201190000841 U CN 201190000841U CN 203498695 U CN203498695 U CN 203498695U
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- CN
- China
- Prior art keywords
- steel cord
- cord
- open
- steel
- preform
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- 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
- D07B2401/00—Aspects related to the problem to be solved or advantage
- D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
- D07B2401/2005—Elongation or elasticity
- D07B2401/201—Elongation or elasticity regarding structural elongation
Abstract
The utility model discloses an open steel cord, which has a structure of n*1 and high elongation at break of not less than 4 percent. The open steel cord has a lay length of more than 10mm. Steel wires of the open steel cord are helically preformed, and the ratio of the preforming height to the diameter of each steel wire is not less than 5.0. The open steel cord has high elongation at break, high elongation under a low load and full rubber penetration, and is used as a reinforcing element of a rubber product.
Description
Technical field
The utility model relates to steel cord, especially relates to the open steel cord with high fracture elongation.The utility model also relates to the rubber product strengthening with steel cord.
Background technology
The steel cord with high fracture elongation, high underload percentage elongation and full rubber osmosis rate is that market is required always, especially as the zero-degree belt of tire and the enhancing element of protective layer.
High-elongation (HE) can cause good shock resistance or shear resistant.Especially for protective layer, in order to obtain good shock resistance or anti-shear performance, for example, when rubber tyre ground stone or similar object, be starved of the steel cord of high-elongation.
Conventionally, steel cord for rubber tyre strengthens zero-degree belt, requirement has high underload percentage elongation (LLE), when LLE is not enough, cord can not expand into required size. consequently, tire curing cross section is different from the design of tire, causes disadvantageous stress distribution in tire, and the service life of reducing tire.
In addition the full rubber osmosis rate that, means 100% rubber osmosis rate is also required.Rubber osmosis rate is better, and fatigue resistance is just stronger.For the steel cord of full rubber osmosis rate, the friction between monofilament is low, and the wearing and tearing of monofilament are also low.And, do not have space to allow aqueous vapor penetrate into cord, result just can not produce corrosion.Therefore the fatigue resistance of steel cord is good, and the service time of steel cord is long.In a word, steel cord structure is more open, and rubber osmosis rate is just better.
But for conduct in rubber product, strengthen the existing steel cord of element, even, in the zero-degree belt and protective layer of rubber tyre, high fracture elongation, full rubber osmosis rate and high LLE can not possess simultaneously.
For the existing HE cord of introducing market, the strand of steel cord is twisted to together with the little lay pitch (being less than 4mm), thereby obtains HE and high LLE.But shortcoming is, it is too tight that monofilament is arranged, to such an extent as between monofilament, almost do not have space to penetrate into rubber.The rubber osmosis rate of this HE steel cord is so poor, to such an extent as to fatigability is bad.In addition, existing HE cord consists of the multi cord of the little lay pitch conventionally, and production cost is very high.
US5707467 discloses the steel cord higher than 5% high fracture elongation.Steel wire is by preform curl before being twisted cord, and the ratio of preform height and filament diameter is between 1.05 to 2.0.Twisting spacing (lay pitch) scope is 8-15.Percentage elongation from 1.18% to 1.57% under 70N load.Because preform value is little, although fracture elongation is very high, LLE is not high.Such steel cord can not be for strengthening the zero-degree belt of rubber tyre.Because LLE is low, the non-constant of tire profile that steel cord strengthens thus.Therefore, tyre life is too short.
EP1344864 also discloses a kind of steel cord, and this steel cord comprises coil preform silk.LLE under 50N load is less than 0.2%.Because LLE is low, this steel cord is not suitable for strengthening zero-degree belt or the protective layer of rubber tyre.
US4938015 discloses a kind of for realizing the open cord of high rubber osmosis rate.This Open architecture forms by round steel cord is rolled into ellipse.But can loss intensity in the operation of rolling.Although this steel cord has high rubber osmosis rate, the fracture elongation of steel cord is but very not high.Therefore, shock resistance or the anti-shear performance of rubber product are bad, cause the life-span of rubber product low.
Utility model content
One of the purpose of this utility model is to address the above problem.
Another object of the present utility model is to provide a kind of open steel cord with high fracture elongation, full rubber osmosis rate and high underload percentage elongation.
Another object of the present utility model is to provide steel cord and as rubber product, strengthens the purposes of element.
According to the utility model, the open steel cord of n * 1 structure has the high fracture elongation that is not less than 4%, the lay pitch of this open steel cord is greater than 10mm, and the steel wire in open steel cord is by preform spirality, and the preform height of steel wire is not less than 5.0 with the ratio of steel wire diameter.
Because the large lay pitch (being greater than 10mm) and high preform are than (being not less than 5.0), this steel cord has high fracture elongation, high underload percentage elongation (LLE) and has the very open structure of full rubber osmosis rate.
High LLE and high fracture elongation are realized by preform steel wire before steel wire being twisted to open steel cord.Preform is than higher, and LLE and fracture elongation are just higher.Preform ratio is what by the preform height of steel wire and the ratio of steel wire diameter, to be limited.
High preform ratio causes high LLE and high fracture elongation, and preform is than higher, and LLE and fracture elongation are just higher.
Preferably, preform is than between 5.0 to 10.0.
More preferably, preform is than between 5.0 to 8.0.Like this, open HE steel cord has high LLE, and also easily manufactures.
In addition, preform length is decided by required LLE and definite preform height.
Fracture elongation is not less than 4%.Preferably, fracture elongation is not less than 4.5%.
Preferably, the percentage elongation of the lower open steel cord of 20N load is not less than 1.00%, is preferably not less than 1.10% and be less than 2.00%.
Preferably, the percentage elongation of the lower open steel cord of 50N load is not less than 1.50%, is preferably not less than 1.60% and be less than 3.00%.
The sub-thread HE cord being twisted with an existing step is compared, the HE cord that for example US5707467 describes, and the LLE of the utility model steel cord is higher.When the utility model steel cord is used as to the enhancing element of rubber tyre, it is required that the profile of tire can meet tire, and the longer service life of tire.
US5707467 discloses a kind of sub-thread HE steel cord, and this steel cord comprises that preform monofilament a step are twisted.But the preform of monofilament is than too little, to such an extent as to LLE is very low.Percentage elongation under 35N load is (certainly, the ratio of elongation under 20N load is less than 1.00%) between 0.71% and 1.00%, and the percentage elongation under 70N load is between 1.18% and 1.57%.They are much smaller than LLE of the present utility model.Meanwhile, the monofilament in US5707467 is that by zigzag, to arrange roller preformed, and wherein, zigzag row roller is only applicable to little preform ratio, and large preform is than realizing.
According to the utility model, steel wire is that sleeve pipe is preformed, and preform is higher than very.The open HE steel cord that comprises this preform steel wire has high LLE.
This open steel cord is that a step is twisted.The lay pitch of open steel cord (or twisting spacing) surpasses 10mm.The lay pitch is larger, and fracture elongation is just less, and still, in steel cord of the present utility model, the larger lay pitch is compensated by large preform ratio, therefore obtains high fracture elongation.Preferably, the lay pitch is between 12mm and 20mm.The lay pitch relates to the quantity of steel wire diameter and steel wire: this means that the lay pitch increases along with the increase of steel wire diameter, and the lay pitch also increases along with increasing of steel wire quantity.
The large lay pitch and high preform are that open steel cord has very open structure than the result combining.This steel cord only just can be closed under high-tension, and-due to initial extensibility be mainly structural and flexible-when tension force is removed, cord can recover its original state.This very open structure will make rubber penetrate into steel cord completely.And fracture elongation and LLE are very high.
Compare with existing multiply HE cord, this Open architecture is huge advantage.Although existing multiply HE cord has high LLE, because its lay pitch is little, this steel cord is a kind of closed type cord.When this cord is immersed to rubber, by venting method testing rubber permeability, be 0%.This means, the utility model steel cord has the full rubber osmosis rate that means 100% rubber osmosis rate.Steel cord of the present utility model is more suitable for for strengthening rubber product than existing multiply HE cord.
Preferably, steel wire diameter between 0.15 and 0.5mm between.
Because the open steel cord of n * 1 structure is that a step is made, n is preferably 2 to 8.According to an embodiment, described n is 4,5 or 6.When n is greater than 10, in order to reach better effect, steel wire diameter increases and reduces with steel wire quantity.
Compare with existing multiply HE cord, steel cord of the present utility model has higher rubber osmosis rate and lower manufacturing cost,, compares with existing sub-thread HE cord meanwhile, and the utility model steel cord has higher LLE.
This open steel cord with high fracture elongation, full rubber osmosis rate and high underload percentage elongation can be as the enhancing element of rubber product.Preferably, rubber product is airtyred zero-degree belt or protective layer.
Accompanying drawing explanation
It shown in Fig. 1, is the manufacturing technique of 6 * 1 open HE cords.
Shown in Fig. 2 a-2d, be the different cross section figure of 6 * 1 open HE cords.
It shown in Fig. 3, is the preform height from the isolated monofilament of 6 * 1 open HE cord.
It shown in Fig. 4, is the sectional view of 4 * 1 open HE cords.
It shown in Fig. 5, is the sectional view of 7 * 1 open HE cords.
It shown in Fig. 6, is the stress strain curve of the utility model steel cord and existing steel cord.
The specific embodiment
Steel wire can be made by wire rod.
The composition of wire rod comprises minimum 0.70% the most about 1.10% carbon content, manganese content range from 0.40% to 0.70%, and silicone content scope from 0.15% to 0.30%, maximum sulfur 0.03%, maximum phosphorus content 0.30%, all percentage is all weight percentage.Except needing very high tensile strength, conventionally only containing trace copper, nickel, aluminium, titanium, nitrogen and/or chromium.
In order to remove the upper oxide existing in surface, first by mechanical descaling and/or at H
2sO
4or in HCl solution, carry out chemical pickling and clean wire rod.Then with clear water rinsing dry wire rod.Next for diameter being reduced to the first mid diameter, dry wire rod is carried out to the operation of First Series dry wire drawing.
In the first mid diameter stage, for example approximately 3.0 arrive 3.5mm, the steel wire after dry wire drawing carries out the first intermediate heat-treatment, is called sorbitizing and processes.Then, steel wire is carried out the preparation of further mechanically deform.
After this, steel wire is from the further dry wire drawing of the first mid diameter to the second mid diameter in a plurality of the second tube reducing steps, and the scope typical case of Second bobbin diameter is from 1.0mm to 2.5mm.
In the second mid diameter stage, steel wire experiences the second sorbitizing to be processed, thereby allows to change into pearlite.
After the second sorbitizing is processed, steel wire is covered with brass coating: copper facing on steel wire, and zinc-plated on copper.Brass coating is that application heat diffusion treatment forms.
In addition, also can on the brass coating of steel wire, apply organic functional silanes coating.
Then, by wet wire drawer, reduce in the cross section of the final series of steel wire experience, and final products are by weight that carbon content surpasses 0.60%, tensile strength conventionally surpasses 3800-2000DMPa and is suitable for the round wire that rubber product strengthens.
The common final diameter scope of steel wire that is suitable for strengthening tire is from 0.15mm to 0.50mm, for example, from 0.20mm to 0.40mm.Filament diameter example has 0.20mm, 0.22mm, 0.245mm, 0.28mm, 0.30mm, 0.32mm, 0.35mm, 0.38mm, 0.40mm.
After above-mentioned technique, with bobbin, collect steel wire and carry out technique below, for example, be out of shape and be twisted cord.
It shown in Fig. 1, is the manufacturing technique of 6 * 1 open HE cords.6 steel wires 10 that come from the diameter 0.26mm of spool 12 are directed to through deformation device cover 14, and every steel wire 10 is by a deformation device cover 14, and each deformation device cover makes steel wire produce plastic bending.Yet, when steel wire overlaps through deformation device, due to the twisting operation in downstream, steel wire rotation.Crooked with rotation with caused spiral helicine preform with the combination of wire speed, thus steel wire 10 under the effect of deformation device cover 14 by preform curl.Next, steel wire 10 is gathered in 16 li, device, and is twisted there 6 * 1 open HE cords 18.
According to the utility model, any deformation device of the produced large deformation that the art personnel are known is all available.Preferably, deformation device is casing deformation device.In deforming process, casing diameter is determined by required steel wire preform height.And, in steel wire is twisted the twisting process of steel cord, obtain the large lay pitch.The high preformation form quotient of steel wire and the large lay pitch of steel cord have caused the HE of steel cord, high LLE and full rubber osmosis rate.
Fig. 2 a is to being that 6 * 1 open HE cords 18 are along the varying cross-section view of the different piece of length shown in 2d.The fracture elongation of steel cord 18 is that the lower percentage elongation of 5.01%, 20N load is that percentage elongation under 1.33%, 50N loads is 1.79%.And the preformation form quotient of monofilament 10 is 5.96.The lay pitch of steel cord 18 is 16mm.The optical diameter of steel cord 18 is 1.68, and this diameter is to measure by the optical projection of steel cord cross section.From diameter, can know that to see steel cord very open, rubber osmosis rate is fine.In fact, the rubber osmosis rate that ventilation method of testing records reaches 100%.
Preformation form quotient is the preform height of steel wire and the ratio of steel wire diameter, and preform height is measured by optical measuring method.First steel cord is cut short, then from steel cord, steel wire is separated into independently monofilament, next with optical measuring method, measure preform height.After optical projection, always have a steel wire waveform, the vertical range between the highs and lows of waveform is exactly preform height (comprising double diameter).It shown in Fig. 3, is the preform height 20 from the isolated monofilament 10 of 6 * 1 open HE cord 18.
Shown in Fig. 4, be 4 * 1 open HE cords.Steel cord 22 comprises the steel wire 24 of 4 diameter 0.35mm, the fracture elongation of steel cord 22 is that the lower percentage elongation of 5.33%, 20N load is that percentage elongation under 1.41%, 50N loads is 1.67%, the preformation form quotient of monofilament 24 is 5.54, and the lay pitch of steel cord 22 is 14mm.
Shown in Fig. 5, be 7 * 1 open HE cords.Steel cord 26 comprises the steel wire 28 of 7 diameter 0.245mm, the fracture elongation of steel cord 26 is that the lower percentage elongation of 4.75%, 20N load is that percentage elongation under 1.30%, 50N loads is 1.53%, the preformation form quotient of monofilament 28 is 6.07, and the lay pitch of steel cord 26 is 17mm.
In addition, steel cord can also be 3 * 1,5 * 1,8 * 1,9 * 1 etc.
Above-mentioned all steel cords all have full rubber osmosis rate and high LLE.
Between steel cord 18 of the present utility model and existing common HE steel cord A, carry out contrast test, steel cord A is 3 * 4 multiply structures lower than the 4mm shallow bid lay pitch, and steel cord A fracture elongation surpasses 4%.Shown in Fig. 6, be stress strain curve, curve 30 is steel cords 18, and curve 32 is steel cord A.From Fig. 6, can know and find out, cord 18 of the present utility model has stress and strain curve like the steel cord category-A with prior art.This illustrates that cord 18 of the present utility model and the steel cord of prior art have similar fracture elongation and LLE.But the rubber osmosis rate of the utility model steel cord 18 is 100%, and the rubber osmosis rate of prior art steel cord A is 0%.In addition, because steel cord 18 is to be twisted with the large lay pitch one step, the steel cord A of prior art is at least twisted through two steps with the very little lay pitch, so the production cost of the utility model cord 18 reduces greatly than the production cost of prior art steel cord A.
The open HE cord with high LLE and full rubber osmosis rate is suitable for use as enhancing rubber product; be particularly useful for strengthening airtyred zero-degree belt or protective layer; this kind of steel cord has good fatigue resistance and long service life, so tire also has long service life.
Claims (8)
1. an open steel cord, there is n * 1 structure, be not less than 4% high fracture elongation, the lay pitch of described open steel cord surpasses 10mm, the steel wire of described open steel cord is by preform spirality, it is characterized in that, the preform height of described steel wire is not less than 5.0 with the ratio of described gauge of wire.
2. open steel cord according to claim 1, is characterized in that, the described ratio of the preform height of described steel wire and the described diameter of described steel wire is between 5.0 and 8.0.
3. open steel cord according to claim 1 and 2, is characterized in that, the described lay pitch is between 12mm and 20mm.
4. open steel cord according to claim 1 and 2, is characterized in that, the percentage elongation of described open steel cord under 20N load is not less than 1.00%.
5. open steel cord according to claim 1 and 2, is characterized in that, the percentage elongation of described open steel cord under 50N load is not less than 1.50%.
6. open steel cord according to claim 1 and 2, is characterized in that, described gauge of wire is between 0.15 to 0.5mm.
7. open steel cord according to claim 1 and 2, is characterized in that, described n is from 2 to 8.
8. open steel cord according to claim 7, is characterized in that, described n is 4,5 or 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201190000841.2U CN203498695U (en) | 2010-10-27 | 2011-10-04 | Open steel cord |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNPCT/CN2010/001707 | 2010-10-27 | ||
| CN2010001707 | 2010-10-27 | ||
| CN201190000841.2U CN203498695U (en) | 2010-10-27 | 2011-10-04 | Open steel cord |
| PCT/EP2011/067259 WO2012055677A2 (en) | 2010-10-27 | 2011-10-04 | Open steel cord |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203498695U true CN203498695U (en) | 2014-03-26 |
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ID=50329687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201190000841.2U Expired - Lifetime CN203498695U (en) | 2010-10-27 | 2011-10-04 | Open steel cord |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203498695U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111005112A (en) * | 2018-10-08 | 2020-04-14 | 贝卡尔特公司 | Steel cord for rubber reinforcement |
| CN113430693A (en) * | 2021-06-24 | 2021-09-24 | 张家港市骏马钢帘线有限公司 | Preparation method of double-twisted galvanized steel cord |
| CN114829703A (en) * | 2019-12-17 | 2022-07-29 | 倍耐力轮胎股份公司 | Metal reinforcing cord for tyres for vehicle wheels |
-
2011
- 2011-10-04 CN CN201190000841.2U patent/CN203498695U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111005112A (en) * | 2018-10-08 | 2020-04-14 | 贝卡尔特公司 | Steel cord for rubber reinforcement |
| CN114829703A (en) * | 2019-12-17 | 2022-07-29 | 倍耐力轮胎股份公司 | Metal reinforcing cord for tyres for vehicle wheels |
| CN113430693A (en) * | 2021-06-24 | 2021-09-24 | 张家港市骏马钢帘线有限公司 | Preparation method of double-twisted galvanized steel cord |
| CN113430693B (en) * | 2021-06-24 | 2023-09-22 | 张家港市骏马钢帘线有限公司 | Preparation method of double-twist galvanized steel cord |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
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Granted publication date: 20140326 |