CN1755011B - Steel cord for intensifying rubber product - Google Patents
Steel cord for intensifying rubber product Download PDFInfo
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- CN1755011B CN1755011B CN2005101071486A CN200510107148A CN1755011B CN 1755011 B CN1755011 B CN 1755011B CN 2005101071486 A CN2005101071486 A CN 2005101071486A CN 200510107148 A CN200510107148 A CN 200510107148A CN 1755011 B CN1755011 B CN 1755011B
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- monofilament
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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
- D07B1/0646—Reinforcing cords for rubber or plastic articles comprising longitudinally preformed wires
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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
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- 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
Abstract
A monofilament which has small spiral or wavy bending and a monofilament which has straightness are twisted to compose a steel wire cord of 1*n structure (n is from 3 to 6). During the test that each monofilament is imposed with tension load to carry out the measuring to strain under each load after the steel wire cord is untwisted, the straight line gradient of the monofilament which has the straightness is 1.05-1.5 times of the straight line gradient of the monofilament which has the small spiral or wavy bending in the domain that the relation of the load and the corresponding strain is demonstrated by a straight line, thereby being able to easily and reliably obtain the steel wire core used to strengthen the rubber product which has sufficient rubber immergence and good fatigue durability.
Description
Technical field
The present invention relates to be used for the all-steel cord of the enhancing of rubbers such as automobile tyre, conveyer belt, particularly relate to the all-steel cord that has sufficient rubber dipped type and good fatigue durability concurrently.
Background technology
As the all-steel cord of the enhancing that is used for rubbers such as automobile tyre, conveyer belt, frequent for example the combine closely all-steel cord of sealing twisted structure (so-called enclosed type) of 3～6 monofilament (steel wire) and individual layer twisted of employing all the time.This all-steel cord, be many and parallelly draw neat and coat and after being configured as composite sheet, be embedded in the all-steel cord in the rubber, be called 1 * 3 structure what 3 steel wires of twisted formed with elastomeric material, in addition, be called 1 * 4,1 * 5,1 * 6 structure accordingly with the monofilament number.Again, also use 2 layers of twisted structure of inside and outside 2 layers of ground twisted multifilament (steel wire), 3 steel wires of twisted and constitute the core thigh for example dispose 9 steel wires around the core thigh of this twisted, and make differently twisted and constitute the all-steel cord of outer field 2 layers of twisted of the twisted direction or the lay pitch and core thigh.In this case, the core thigh is the twisted structure same with above-mentioned case type all-steel cord.
But, in the case type all-steel cord of dense twisted, have a continuous along its length space in that cord is inner, during the shaping composite sheet, the space of this cord inside can not immersed elastomeric material and directly get off as voids left utilizing elastomeric material cladding steel silk cord.And, when the vulcanization of rubber pressurization of tire building operation etc., reduce owing to the rubber that is wrapped in the cord surface immerses inner this space that makes of cord, but can not buried by rubber fully, and make the cord center become the hollow bulb of the suction pipe shape that extends along its length and left behind.And, the moisture that condensation of gas produced that elastomeric material generates or soak into into this hollow bulb from the moisture of the immersions such as wound of outside etc. in, its result, corrosion is from the inner beginning of cord, the intensity decreases of all-steel cord, and the cementability of all-steel cord and elastomeric material descends, and causes the so-called segregation phenomenon that all-steel cord and elastomeric material are peeled off, and becomes the main cause that product life significantly shortens.
Again, also can consider the individual layer twisted that all the time uses, the twisted all-steel cord of the open twisted structure (so-called opening) of pine, it is twisted is set between each monofilament with gap and makes elastomeric material can be immersed in cord inside that described open twisted is constructed.But, the all-steel cord of open twisted structure, make elastomeric material fully immerse cord inside and then must make gap big (at least more than 0.01mm) between each monofilament, the movably free space of each monofilament becomes big when the gap is big, so produce the lateral deviation of monofilament etc., twisted becomes inhomogeneous at length direction, be easy to generate when applying alternating bending stress and buckle, again, because the stretching, extension under the extremely low load is big, so not only operability worsens, and because the tension force that composite sheet applies when being shaped and the gap reduces, elastomeric material often can not fully immerse cord inside.
Therefore, shown in for example special fair 7-68673 communique, No. 3179915 communique of special permission, developed the all-steel cord of the individual layer twisted that the following two kinds of monofilament of twisted form, described two kinds of monofilament are: have the monofilament of little helical form different with the helical buckling that is used for the cord twisted or wavy bending and do not have the linear monofilament of having of other bendings except that the helical buckling that is used for the cord twisted.
The all-steel cord of individual layer twisted, make like this and will have the little helical form different or the monofilament of wavy bending with the helical buckling that is used for the cord twisted, with the structure that except that the helical buckling that is used for the cord twisted, does not have the linear monofilament twisted of having of other bendings, even thereby twisted itself is dense, also can utilize the little helical form or the wavy bending of a part of monofilament under the state of twisted, between monofilament, to form the gap that elastomeric material is immersed, and the tension force that composite sheet relative and that elastomeric material carries out applies when being shaped, utilization has the stretching, extension of the resistance inhibition all-steel cord of linear monofilament, can prevent to eliminate little helical form or wavy bending, thereby can provide following all-steel cord, it can keep between monofilament making that elastomeric material fully immerses the gap of cord inside, and twisted itself is dense and suppress stretching, extension under the extremely low load, improve operation task, and can make the twisted of cord length direction stable, even alternating bending stress also is not easy to produce and buckles, fatigue durability is good.
But, the all-steel cord of individual layer twisted, have the little helical form or the monofilament of wavy bending by making twisted, with structure with linear monofilament, not necessarily all have sufficient rubber dipped type and good fatigue durability concurrently, in order to have sufficient rubber dipped type and good fatigue durability simultaneously, whenever the monofilament number of cord and filament diameter not simultaneously, from rubber dipped type and two aspects of fatigue durability, all must be with the radical of bending machining, the bending machining pitch, the setting of bending machining height etc. is specific to be best setting, and this specific being difficult for carries out.
Summary of the invention
Therefore, the objective of the invention is to, address the above problem, can be easily and obtain following rubber-product-reinforcing steel cord reliably, its be the monofilament of twisted with little helical form or wavy bending, with have the structure of linear monofilament, have sufficient rubber dipped type and good fatigue durability.
The present inventor finds, the monofilament that has little helical form or a wavy bending for twisted with have in the rubber-product-reinforcing steel cord that linear monofilament forms, all-steel cord with sufficient rubber dipped type and good fatigue durability, apply on every monofilament when removing twisted and to find when tensile load is measured the test of cutting out the strain under the lotus fully, the zone that the load of 2 kinds of monofilament exists available straight line to represent with respect to the relation of strain, and the load of representing these 2 kinds of monofilament is specific under the relation of regulation with respect to the slope of the straight line of the relation of strain, thereby can remove the slope of the load of these 2 kinds of monofilament behind the twisted according to expression, specificly go out rubber dipped type and the good all-steel cord of fatigue durability with respect to the straight line of the relation of strain.
Promptly, rubber-product-reinforcing steel cord of the present invention, be that twisted has the little helical form different with the helical buckling that is used for the cord twisted or the monofilament of wavy bending, with the all-steel cord of except that the helical buckling that is used for the cord twisted, not making 1 * n (n=3～6) structure that the linear monofilament of having of other bending machining forms, it is characterized in that: when measuring the test of the strain under each load each monofilament behind this all-steel cord releasing twisted is applied tensile load, load ties up to respect to the pass of strain in the zone of load 10～50N each monofilament all is straight line roughly, and, in this zone, represent above-mentioned slope with load of linear monofilament with respect to the straight line of the relation of strain, the load that is the above-mentioned monofilament with little helical form or wavy bending of expression is with respect to 1.05～1.5 times of the slope of the straight line of the relation of strain.
So-called little spiral helicine bending is meant three-dimensional helical form bending, and so-called wavy bending is meant the i.e. bending of two dimension of shape of spiral projection, has equal effect.Again, the direction of helical form bending can be identical with cord twisted direction, also in the other direction.
Apply tensile load and when measuring the test of the strain under each load, load ties up to load 10～50N with respect to the pass of strain zone all is straight line roughly to each monofilament, and in this zone, represent above-mentioned slope with load of linear monofilament with respect to the straight line of the relation of strain, the load that is the above-mentioned monofilament with little helical form or wavy bending of expression is with respect to 1.05～1.5 times of the slope of the straight line of the relation of strain, in other words be meant, apply tensile load and when measuring the test of the strain under each load, the curve of the relation of expression load and strain all is straight line roughly to each monofilament in load 10～50N regional, and in this zone, the curve of representing the relation of above-mentioned above-mentioned sanction lotus with linear monofilament and strain is load and the transverse axis slope with respect to transverse axis when being strain at the longitudinal axis, the above-mentioned load that is above-mentioned monofilament with little helical form or wavy bending is load and transverse axis 1.05～1.5 times with respect to the slope of transverse axis when being strain with respect to the curve of the relation of strain at the longitudinal axis, promptly, apply tensile load and when measuring the test of the strain under each load load with respect to the recurrence of strain, in the zone of load 10～50N each monofilament all is straight line roughly, and in this zone, above-mentioned regression coefficient with linear monofilament is 1.05～1.5 times of regression coefficient of above-mentioned monofilament with little helical form or wavy bending.
Under the state of removing the all-steel cord twisted, each monofilament applied tensile load and when measuring the test of the strain under each load, load all is under the situation of roughly straight line with respect to the zone that the pass of strain ties up to load 10～50N to each monofilament, in this zone, if expression has the slope of the load of linear monofilament with respect to the straight line of the relation of strain, the load that is the monofilament of expression with little helical form or wavy bending (in other words is meant with respect to 1.05～1.5 times of the slope of the straight line of the relation of strain, curve with relation of the above-mentioned load of linear monofilament and strain is load and the transverse axis slope with respect to transverse axis when being strain at the longitudinal axis, the curve that is the relation of the above-mentioned load of the above-mentioned monofilament with little helical form or wavy bending of expression and strain is load and transverse axis 1.05～1.5 times with respect to the slope of transverse axis when being strain at the longitudinal axis, be that regression coefficient is 1.05～1.5 times of regression coefficient with monofilament of little helical form or wavy bending), then can estimate this all-steel cord is to have sufficient rubber dipped type and good fatigue durability as rubber-product-reinforcing steel cord.
Promptly, this all-steel cord, utilize the little helical form or the wavy bending of a part of monofilament, under the state of twisted, can between monofilament, there be the gap that elastomeric material is immersed, and with respect to carrying out the tension force that applies when composite sheet is shaped with elastomeric material, the load of representing each monofilament is with respect to the slope (regression coefficient) of the straight line of the relation of strain when having above-mentioned relation, the resistance that produces on the linear monofilament is enough big having, utilize its resistance to suppress the stretching, extension of all-steel cord, can prevent little helical form or wavy crooked the disappearance, thereby can between monofilament, keep elastomeric material fully to immerse the gap of cord inside.Again, this all-steel cord, twisted itself is dense, thus the stretching, extension under the extremely low load is little, can be designed to the good goods of operability, even and the stable alternating bending stress of twisted that can be designed to length direction also be not easy to produce the good goods of fatigue durability of buckling.Therefore, the bending machining radical of the monofilament by setting this all-steel cord, bending machining pitch, bending machining height etc. can obtain to have the rubber-product-reinforcing steel cord of sufficient rubber dipped type and good fatigue durability.
If expression has the slope (regression coefficient) of the load of linear monofilament with respect to the straight line of the relation of strain, the load of monofilament that has little helical form or wavy bending less than expression is with respect to 1.05 times of the slope of the straight line of the relation of strain, then the resistance with respect to tensile force is little, crooked because the tension force that applies during with the composite sheet shaping of elastomeric material etc. disappears, can not obtain sufficient rubber dipped type.Again, if instead expression has the slope (regression coefficient) of the load of linear monofilament with respect to the straight line of the relation of strain, the load of monofilament that has little helical form or wavy bending greater than expression is with respect to 1.5 times of the regression coefficient of the straight line of the relation of strain, then the shape during the twisted line is inhomogeneous, and fatigue durability descends.
Like this, if employing the present invention, then remove the slope (regression coefficient) of the load of the monofilament that expression behind the all-steel cord twisted has little helical form or wavy bending with respect to the straight line of the relation of strain by particular solution, have the relation of the load of linear monofilament with expression with respect to the slope (regression coefficient) of the straight line of the relation of strain, the all-steel cord that can specificly have sufficient rubber dipped type and good fatigue durability can be easily and obtain reliably to have the monofilament of little helical form or wavy bending and have the structure of linear monofilament for twisted, and rubber-product-reinforcing steel cord with sufficient rubber dipped type and good fatigue durability.
Description of drawings
Fig. 1 is the cutaway view (B) of the all-steel cord of the cutaway view (A) of all-steel cord of an example of embodiments of the present invention and other examples.
Fig. 2 is the side view of the all-steel cord shown in Fig. 1 (A).
Fig. 3 is expression all-steel cord of the present invention when measuring the test of the strain under each load applying tensile load, the load chart with respect to the relation of strain.
Fig. 4 is the chart of the relation of following ratio of expression and the rubber dipped type of removing the preceding all-steel cord of twisted, described ratio is meant, monofilament that the twisted bending machining is crossed and the all-steel cord with individual layer twisted that linear monofilament forms are removed the ratio of each monofilament between slope under tensile load 10～50N, following straight line (regression coefficient) of gained behind the twisted, described straight line be expression have monofilament that linear monofilament and bending machining cross, load is with respect to the straight line of the relation of strain.
The specific embodiment
Followingly embodiments of the present invention are described with reference to accompanying drawing.
Fig. 1 represents the cross-sectional configuration of the all-steel cord of embodiments of the present invention.The all-steel cord of present embodiment is shown in Fig. 1 (A), be twisted for example 3 monofilament (sandwich layer silk) form 1 * 3 the structure all-steel cord 10, be following formation, promptly, 1 monofilament 11 is made as monofilament with little helical form bending different with the helical buckling that is used for the cord twisted, except that the helical buckling that is used for the cord twisted, do not make the linear monofilament of having of other bending machining and other 2 monofilament 12 are made as, twisted they and form.At this, so-called little spiral helicine bending is meant three-dimensional helical form bending.The direction of helical form bending can be identical with cord twisted direction, also in the other direction.
This all-steel cord, and for example shown in Fig. 1 (B), also all-steel cord 20, described all-steel cord 20 be twisted for example 3 monofilament (sandwich layer silk) form 1 * 3 the structure all-steel cord, and following formation, promptly, 1 monofilament 21 that will be wherein is made as different with the helical buckling that is used for the cord twisted and has the monofilament of wavy bending, do not make the linear monofilament of having of other bending machining and other 2 monofilament 22 are made as except that the helical buckling that is used for the cord twisted, twisted they and form.At this, so-called wavy bending is meant the i.e. bending of two dimension of shape with spiral projection gained.
Monofilament 11,21 with helical form or wavy bending, filament diameter be with to have linear other monofilament 12,22 identical, and bending machining curl or wavy as shown in Figure 2, makes crooked pitch P1 less than lay pitch P, P
1=0.1P～0.7P is for apparent outside diameter d
1, when filament diameter is made as d, d
1=(d+2/100mm)～(d+2/10mm).At this, so-called crooked pitch P
1, be meant the pitch (with reference to Fig. 2) of the monofilament that bending machining is crossed or the pitch of ripple, so-called apparent outside diameter d
1Be meant that the circumscribed circle A1[that looks from the length direction of the monofilament 11 of bending machining curl is with reference to Fig. 1 (A)] diameter, perhaps the oval A2[of external projection that looks from the length direction of the rugose monofilament 21 of bending machining is with reference to Fig. 1 (B)] major diameter and the mean value of minor axis.
And, the all-steel cord 10 of present embodiment, 20, with these all-steel cords 10,22 remove each monofilament 11 behind the twisted, 12,21, apply tensile load on 22 and when measuring the test of the strain under each load, load ties up to respect to the pass of strain in the zone of load 10～50N each monofilament all is straight line roughly, and in this zone, represent above-mentioned slope (regression coefficient) with load of linear monofilament with respect to the straight line of the relation of strain, the load that is the above-mentioned monofilament with little helical form or wavy bending of expression is with respect to 1.05～1.5 times of the slope (regression coefficient) of the straight line of the relation of strain.Promptly, with these all-steel cords 10,22 remove each monofilament 11 behind the twisted, 12,21, apply tensile load on 22 and when measuring the test of the strain under each load, expression load (N) with respect to the chart of the relation of strain (%) as for example shown in Figure 3, in the zone of load 10～50N each monofilament all is straight line roughly, and in this zone at load 10～50N, has linear monofilament 12, (longitudinal axis is a load to the slope of 22 curve (dotted line), when transverse axis is strain, slope with respect to transverse axis), be monofilament 11 with little helical form or wavy bending, (longitudinal axis is a load to the slope of 21 curve (solid line), when transverse axis is strain, with respect to the slope of transverse axis) 1.05～1.5 times (in examples of Fig. 3 about 1.2 times).
Twisted has the monofilament of little helical form or wavy bending and has the rubber-product-reinforcing steel cord that linear monofilament forms, when measuring the test of the strain under each load to removing each monofilament behind the twisted to apply tensile load, all is the situation of roughly straight line under with respect to the zone that the pass of strain ties up to load 10～50N to each monofilament in load, if in this zone, expression has the slope (regression coefficient) of the load of linear monofilament with respect to the straight line of the relation of strain, be the monofilament of expression with little helical form or wavy bending load with respect to 1.05～1.5 times of the slope (regression coefficient) of the straight line of the relation of strain (promptly, expression has the above-mentioned load of linear monofilament with respect to the curve of the relation of the strain slope with respect to transverse axis when the longitudinal axis is strain for the load transverse axis, the above-mentioned load that is above-mentioned monofilament with little helical form or wavy bending is with respect to the curve of the relation of strain 1.05～1.5 times with respect to the slope of transverse axis when the longitudinal axis is strain for the load transverse axis), can judge that then this all-steel cord has sufficient rubber dipped type and good fatigue durability as rubber-product-reinforcing steel cord.
Fig. 4 is a chart, with regard to each monofilament after monofilament that the twisted bending machining is crossed and the all-steel cord with 1 * 3 structure that linear monofilament forms are removed twisted in tensile load under 10～50N with respect to regard to the relation of the ratio of regression coefficient in the recurrence of strain, that have the monofilament that linear monofilament and bending machining cross, the evaluation table of the rubber dipped type of the all-steel cord before the releasing twisted is shown as chart.Evaluation during 1 * 4,1 * 5,1 * 6 structure also is much the same therewith chart.Shown in this chart, have the little helical form different or the monofilament of wavy bending for twisted with the helical buckling that is used for the cord twisted, with the all-steel cord of except that the helical buckling that is used for the cord twisted, not making 1 * n (n=3～6) structure that the linear monofilament of having of other bending machining forms, if behind the releasing twisted under tensile load 10～50N, it is low with respect to the ratio of the slope (regression coefficient) of the straight line of the relation of strain with the load of representing the monofilament that bending machining is crossed with respect to the slope (regression coefficient) of the straight line of the relation of strain that expression has the load of linear monofilament, then the rubber dipped type is poor, this ratio then can obtain enough rubber dipped types (regression coefficient with linear monofilament is more than 1.05 of regression coefficient with monofilament of little helical form or wavy bending) more than 1.05.But, if this ratio surpasses 1.5[and represents to have the load of linear monofilament and have the load of monofilament of little helical form or wavy bending than expression with respect to the slope (regression coefficient) of the straight line of the relation of strain with respect to the 1.5 times big of slope (regression coefficient) of the straight line of the relation of strain], shape when then twisting thread becomes inhomogeneous, and fatigue durability worsens.At this, the rubber dipped type for example applies on all-steel cord and is embedded in the rubber under the state of tensile load of 5kg and after the sulfuration, all-steel cord is extracted from rubber and the strip off monofilament, observes the monofilament complete cycle, uses the area occupation ratio judgement that contact with elastomeric material.
Therefore, when removing expression behind the twisted and have the load of linear monofilament 12,22 has little helical form or a wavy bending for expression with respect to the slope (regression coefficient) of the straight line of the relation of strain the load of monofilament 11,21 with respect to 1.05～1.5 times of the slope (regression coefficient) of the straight line of the relation of strain, the setting of monofilament number, filament diameter, bending machining radical, bending machining pitch, bending machining height etc. is evaluated as suitable setting.Then, utilize this setting to reproduce all-steel cord.Like this, can obtain to have the rubber-product-reinforcing steel cord of sufficient diffusing in property of rubber and good fatigue durability.
These all- steel cords 10,20 coat half finished rubber around and are configured as the composite sheet compound with elastomeric material, for example when tire as in the tire reinforcement provided rubber of imbedding tire body.At this moment, if around all- steel cord 10,20, coat half finished rubber, then clearance C 1, the C2 of 12,22 on the monofilament of the monofilament 11,21 crossed from bending machining of half finished rubber and straight line immerse cord inside, cure when tire and overflow saturating in hollow bulb B1, the B2 at cord center.
In addition, in illustrated embodiment, to constitute all- steel cord 10,1 monofilament 11 in 3 monofilament of 20,21 are made as the monofilament with little helical form bending, with other 2 monofilament 12,22 are made as and have linear monofilament, but monofilament 11 with little helical form or wavy bending, the 21st, the part of the monofilament of formation all-steel cord, at least it is 1, as long as in whole below 1/2 of monofilament quantity, when utilizing 3 monofilament to form all-steel cords 1 suitable, when utilizing 4 above monofilament to form all-steel cord, then be not limited to 1, also more than 2 or 2 (but all below 1/2 of monofilament quantity).
The present invention is suitable for use in the all-steel cord of 1 * n (n=3～6) structure.Illustrated embodiment is the situation of 1 * 3 structure, but the present invention is applicable to the all-steel cord of 1 * 4,1 * 5 and 1 * 6 structure too.Again, all-steel cord of the present invention also can be used as the core thigh use of 2 layers of twisted structure.
The result of the test of sample of all-steel cord of the various structures of copper-plated multifilament has been implemented on table 1 expression twisted surface.Embodiment 1 is following all-steel cord, it is 1 * 3 structure, filament diameter 0.30mm, and the radical (bending machining radical) with monofilament of little helical form bending is 1, and being illustrated in the load that has the monofilament that linear monofilament and bending machining cross under load 10～50N is 1.3 with respect to the ratio (coefficient) of the slope (regression coefficient) of the straight line of the relation of strain; Embodiment 2 is following all-steel cords, and it is 1 * 5 structure, filament diameter 0.30mm, and the bending machining radical is 2, and above-mentioned ratio (coefficient) is 1.15; Comparative example 1 is following all-steel cord, and it is 1 * 3 structure, filament diameter 0.30mm, and the bending machining radical is 1, and above-mentioned ratio (coefficient) is 1.55; Comparative example 2 is following all-steel cords, and it is 1 * 5 structure, and filament diameter 0.30mm, bending machining radical are 2, and above-mentioned ratio (coefficient) is 1.03.
Table 1
| Structure | Bending machining radical (root) | Coefficient | Rubber dipped type (%) | Fatigability exponential representation | | |
| Embodiment | ||||||
| 1 | 1×3×0.30 | 1 | 1.3 | 100 | 100 | |
| Embodiment 2 | 1×5×0.30 | 2 | 1.15 | 95 | 100 | |
| Comparative example 1 | 1×3×0.30 | 1 | 1.55 | 100 | 50 | Shape is inhomogeneous |
| Comparative example 2 | 1×5×0.30 | 2 | 1.03 | 25 | 80 |
For the manufacturing of the rubber-product-reinforcing steel cord in this test, use bunching machine as twisting machine.And, as the equipment that on each monofilament, processes little roughly helical form bending, use is rotated the monofilament of supplying with as the axle core well-known bender, make monofilament by between a plurality of pins that are provided with on the bender, as the axle center bender is rotated at a high speed on this monofilament, thereby on the monofilament that passes through, process little helical form bending, afterwards, between the meeting point 3 bending machining cone pins nearby that are arranged on twisted, thereby be used for the spiral helicine bending machining of twisted.At this moment, the diameter of selected respectively cone pin and at interval, be pressed into the tension force of degree and monofilament etc., and adjust the situation etc. that is pressed into of corrector roll, change the pitch of bending machining and the height of bending machining, adjust the regression coefficient of each monofilament.
And, the stretching that applies 5kg on each all-steel cord is cut out and to be embedded under the state of lotus in the rubber after the sulfuration, and all-steel cord is extracted from rubber and the strip off monofilament, observes the monofilament complete cycle, measure the area occupation ratio that contacts with elastomeric material, be expressed as " rubber dipped type (%) ".
Again, in sheet rubber, imbed the all-steel cord of many same specifications, 3 belt wheel flexural fatigues of carrying out certain number of times with this sheet repeatedly, from sheet rubber, take out cord afterwards and measure fracture strength, compare with the fracture strength before the fatigue test, its result is carried out exponential representation (" fatigability exponential representation ").The more little fatigue durability of index is poor more.
It is excessive with respect to the ratio (coefficient) of the slope (regression coefficient) of the straight line of the relation of strain that comparative example 1, expression have the load of the monofilament that linear monofilament and bending machining cross, so the shape when twisting thread is inhomogeneous, can not obtain sufficient fatigue durability.Again, comparative example 2, it is too small with respect to the ratio (coefficient) of the slope (regression coefficient) of the straight line of the relation of strain that expression has the load of the monofilament that linear monofilament and bending machining cross, so can not obtain sufficient rubber dipped type.
Relative with it, embodiment 1 and embodiment 2, the load that expression has the monofilament that linear monofilament and bending machining cross is suitable with respect to the ratio (coefficient) of the slope (regression coefficient) of the straight line of the relation of strain, so be the all-steel cord that rubber dipped type and fatigue durability all are met.
Claims (1)
1. rubber-product-reinforcing steel cord, be that twisted has the monofilament of little helical form different with the helical buckling that is used for the cord twisted or wavy bending and do not make the all-steel cord of 1 * n structure that the linear monofilament of having of other bending machining forms except that the helical buckling that is used for the cord twisted, n=3～6 wherein
It is characterized in that:
Above-mentioned quantity with monofilament of little helical form or wavy bending is below 1/2 of whole monofilament quantity that constitutes this all-steel cord,
When measuring the test of the strain under each load to each monofilament behind this all-steel cord releasing twisted is applied tensile load, load ties up to respect to the pass of strain in the zone of load 10～50N each monofilament all is straight line roughly, and, in this zone, represent above-mentioned slope with load of linear monofilament with respect to the straight line of the relation of strain, the load that is the above-mentioned monofilament with little helical form or wavy bending of expression is with respect to 1.05～1.5 times of the slope of the straight line of the relation of strain.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP282015/04 | 2004-09-28 | ||
| JP2004282015A JP2006097151A (en) | 2004-09-28 | 2004-09-28 | Steel cord for rubber product reinforcement |
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| CN1755011A CN1755011A (en) | 2006-04-05 |
| CN1755011B true CN1755011B (en) | 2010-12-08 |
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| JP (1) | JP2006097151A (en) |
| KR (1) | KR101188968B1 (en) |
| CN (1) | CN1755011B (en) |
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| CN105625067A (en) * | 2016-04-01 | 2016-06-01 | 法尔胜泓昇集团有限公司 | Airtight adhesive tape steel wire rope |
| CN112014250A (en) * | 2020-09-01 | 2020-12-01 | 安徽佳通乘用子午线轮胎有限公司 | Fatigue resistance testing method for tire steel wire cord fabric and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5319915A (en) * | 1990-06-16 | 1994-06-14 | Tokusen Kogyo Co., Ltd. | Steel cord for reinforcing rubber product |
| CN1421569A (en) * | 2001-11-22 | 2003-06-04 | 住友橡胶工业株式会社 | Metal cord and inflation tyre containing the Same metal cord |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0791791B2 (en) * | 1990-06-16 | 1995-10-04 | トクセン工業株式会社 | Steel cord for reinforcing rubber products |
| JPH0730714Y2 (en) * | 1990-09-27 | 1995-07-12 | 金井 宏之 | Steel cord for reinforcing rubber products |
| JP2821653B2 (en) * | 1991-05-30 | 1998-11-05 | トクセン工業 株式会社 | Steel cord for reinforcing rubber products |
| JPH05140882A (en) * | 1991-06-21 | 1993-06-08 | Sumitomo Electric Ind Ltd | Metallic cord for reinforcing rubber article |
| JP2719862B2 (en) * | 1991-12-27 | 1998-02-25 | トクセン工業株式会社 | Steel cord for reinforcing rubber products |
| JP2569185Y2 (en) * | 1992-03-27 | 1998-04-22 | 金井 宏之 | Steel cord for reinforcing rubber products |
| JPH0589493U (en) * | 1992-05-19 | 1993-12-07 | 金井 宏之 | Steel cord for reinforcing rubber products |
| JP2942885B2 (en) * | 1996-02-05 | 1999-08-30 | 東京製綱株式会社 | Steel cords for rubber reinforcement and radial tires |
| JPH11100782A (en) * | 1997-07-29 | 1999-04-13 | Tokyo Seiko Co Ltd | Steel code and steel radial tire |
| JP4106149B2 (en) * | 1999-02-23 | 2008-06-25 | 金井 宏彰 | Steel cord for tire reinforcement |
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2004
- 2004-09-28 JP JP2004282015A patent/JP2006097151A/en active Pending
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2005
- 2005-06-17 KR KR1020050052151A patent/KR101188968B1/en active IP Right Grant
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5319915A (en) * | 1990-06-16 | 1994-06-14 | Tokusen Kogyo Co., Ltd. | Steel cord for reinforcing rubber product |
| CN1421569A (en) * | 2001-11-22 | 2003-06-04 | 住友橡胶工业株式会社 | Metal cord and inflation tyre containing the Same metal cord |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2001-246909A 2001.09.11 |
| JP特开平7-68673A 1995.03.14 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101188968B1 (en) | 2012-10-08 |
| JP2006097151A (en) | 2006-04-13 |
| CN1755011A (en) | 2006-04-05 |
| KR20060048407A (en) | 2006-05-18 |
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