CN103660799B - Motorcycle tyre and making method thereof - Google Patents
Motorcycle tyre and making method thereof Download PDFInfo
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- CN103660799B CN103660799B CN201310394947.0A CN201310394947A CN103660799B CN 103660799 B CN103660799 B CN 103660799B CN 201310394947 A CN201310394947 A CN 201310394947A CN 103660799 B CN103660799 B CN 103660799B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Abstract
The invention provides a motorcycle tyre and a making method thereof; the rolling resistance performance, operation stability and transition performance of steering from straight to a corner can be simultaneously improved; tread rubber comprises the following structures: a bottom layer having tread rubber side portions on two ends and a connecting rubber portion connecting the two tread rubber side portions; and a top layer configured on an outer side in a radial direction. The top layer comprises a central top on a tyre equatorial face side and shoulder tops configured on two outer sides of the central top; the central top comprises a central top main body portion forming a tyre surface and a central top base portion on a radial inner side of the central top main body portion; a cross section of the central top is a similar trapezoid with a base angle [theta] under 45 degrees, and rubber is employed to form a ring through extrusion molding so as to form the central top. A rubber strip is winded in a spiral shape so as to form the bottom layer and the shoulder tops.
Description
Technical field
The present invention relates to be able to ensure that excellent rolling resistance performance, and the motorcycle use of control stability can be improved
Tire and its manufacture method.
Background technology
For even for motorcycle tire, from from the viewpoint of low oil consumption, it is also preferred that such as Fig. 9（A）Schematic institute
Show like that, the main part a of tread rubber A is divided into into rubber layer a1 of radial outside and rubber layer a2 of inner side, and will loss
Tangent value δ little low heat generation rubber is used for rubber layer a2 of inner side.Wherein, the tyre surface with the cementability of sidewall rubber can will be improved
Side glue portion b is configured at the both sides of aforementioned body portion a, and will can improve the tyre surface with the cementability of tyre surface reinforcing cord layer etc.
Bottom glue portion c is configured at below main part a.
However, for the little rubber of loss tangent value, its caoutchouc elasticity is relatively low.Therefore, by low heat generation
Rubber is used in the tire of rubber layer a2 of above-mentioned inner side, and tire shoulder rigidity is not enough, and because causing impaired grade of turn performance behaviour is caused
The decline of handing stability.
Therefore, present inventors have proposed following scheme：Such as Fig. 9（B）It is schematically shown, rubber layer a1 in above-mentioned outside is thin
It is divided into the tire shoulder glue part a1s in the outsides of crown part a1c and its two of tire equator side, elastomeric rubber is used for into the tire
Shoulder glue part a1s, and only in the rubber layer of the above-mentioned crown part a1c inner sides being made up of low heat generation rubber formed below
a2.In this case, tire shoulder rigidity can fully be improved such that it is able to greatly improve turn performance.Further, due to turning time
Shared ratio is little between in motion, therefore can also maintain rolling resistance performance.In addition, for including above-mentioned cap rubber
For part a1c and the rubber layer a2 of inner side, base angle θ of the section in approximate trapezoid shape part B, such as 45 ° are decreased to
Below such that it is able to realize from straight trip to the smoothly transformation turned.
Herein, for section be formed above-mentioned crown part a1c, tire shoulder glue part a1s, rubber layer a2 of inner side and
For the tread rubber of the such scheme that tyre surface side glue portion b this 4 rubber compositions are divided, extruded by using multilayer rubber
Device carries out one extrusion molding and can substantially form the tread rubber.
However, due to the construction complexity of the stream in extruder head, tube head, therefore, it is difficult to stably controlling each rubber composition
Rubber flowing.Therefore, especially forming the tip portion J of above-mentioned base angle θ can deform because of the variation of rubber flowing, from
And there is a problem of causing from straight trip to decline to the transiting performance turned.
On the other hand, following technology has been recorded in following patent documents 1：Using by band（ribbon）The rubber strip of shape
Band（strip）It is spiral helicine so-called around band to be wound into（STW）Method and form tread rubber, also can be substantially formed using the STW methods
The tread rubber of such scheme.However, be but difficult to accurately form above-mentioned tip portion J using STW methods, with above-mentioned one extrusion
The situation of shaping is identical, there is also the problem for causing to decline to the transiting performance turned from straight trip.
Patent document 1：Japanese Unexamined Patent Publication 2006-176078 publications
The content of the invention
Therefore, it is an object of the invention to provide a kind of motorcycle tire and its manufacture method, constitute by 4 rubber
Thing is divided to be formed as predetermined pattern to the section of tread rubber, as basic, both can ensure that excellent rolling resistance
Power performance can improve control stability again, and also can suppress the decline from straight trip to the transiting performance turned.
In order to solve above-mentioned problem, the invention of technical scheme 1 is related to a kind of motorcycle tire, the tire of fetus face
The tire axial that face surface is bent between extension, and above-mentioned tyre surface end from equatorial plane to tyre surface end in dome arcuation is straight
Linear distance that is, tread width composition tire Breadth Maximum, forming the tread rubber of above-mentioned fetus face includes：Throughout tread width ground
The bottom of extension；With the top layer of the tire radial outside for being configured at the bottom, above-mentioned bottom includes：In the tire axial of tread rubber
The tyre surface side glue portion of the section in subtriangular shape of two ends configuration；And the link rubber that will link between the tyre surface side glue portion
Glue portion, above-mentioned top layer includes：The central top of tire equator surface side；With the outside of tire axial two for being configured at the central top
Tire shoulder top, above-mentioned central top includes：Form the central top main part of tread surface；Be configured at central top master
The central top base part of the tire radial direction inner side of body portion, and the section of above-mentioned central top is in approximate trapezoid shape, it is right
For the approximate trapezoid shape, the tire axial length of its inner radial surface more than its radially-outer surface tire axial length,
And base angle θ is less than 45 °, also, above-mentioned central top is made up of extrusion molding article, and the extrusion molding article is by by extrusion molding
Rubber winds a circle in tire circumference and forms, also, above-mentioned bottom and tire shoulder top are rolled up respectively by the rubber strip by banding
Helically wound roll of strip is formed around product.
In addition, in technical scheme 2, it is characterised in that above-mentioned central top main part and above-mentioned tire shoulder top by
The shared ratio in rubber intensive of silica is that the rubber of the high silicon dioxide proportioning of more than 75% mass parts is constituted.
In addition, in technical scheme 3, it is characterised in that when for above-mentioned central top base part by its rubber just
Cut penalty values be set to tan δ 1 and by its complex modulus be set to E*1, for above-mentioned central top main part by its rubber just
Cut penalty values be set to tan δ 2 and its complex modulus be set to into E*2, for above-mentioned tire shoulder top by the tangent penalty values of its rubber
When being set to tan δ 3 and its complex modulus being set to into E*3,
Meet following relation（1）、（2）：
The ＜ tan δ 3--- of 1 ＜ tan δ of tan δ 2（1）
E*1 ＜ E*2 ＜ E*3---（2）.
Additionally, technical scheme 4 is related to a kind of tire manufacturing method, using the tire manufacturing method technical scheme 1～3 is formed
Motorcycle tire described in middle either a program, the tire manufacturing method is characterised by, including the tread rubber for forming tread rubber
Formation process, above-mentioned tread rubber formation process has：On forming cylinder, by banded first rubber strip winding into spiral
Shape, is consequently formed the bottom forming step of above-mentioned bottom；In the link rubber section of above-mentioned bottom, will extrude from extrusion shaping machine
Extrusion molding rubber of the section of shaping in approximate trapezoid shape winds one and encloses, and the central top for being consequently formed central top forms step
Suddenly；And between above-mentioned central top and the tyre surface side glue portion of above-mentioned bottom, by the second rubber strip winding of banding into
Helical form, the tire shoulder top forming step being consequently formed at the top of tire shoulder, also, in above-mentioned bottom forming step, using continuous
Extruder continuously extrudes above-mentioned first rubber strip, and after first rubber strip is extruded, with U-shaped to this first
Rubber strip is repeatedly turned back, and via the reservoir for temporarily storing first rubber strip towards forming cylinder intermittently
Supply first rubber strip and be wound into helical form, on the other hand, in forming step at the top of above-mentioned tire shoulder, using tooth
The batch extruders of wheel pump type intermittently extrude above-mentioned second rubber strip, and second rubber strip is extruded just
Helical form is supplied and is wound under the condition of high temperature afterwards towards forming cylinder.
The present invention is as described above, in the wheel for being divided into the bottom extended throughout tread width and be configured at the bottom
In the tread rubber of the top layer of tire radial outside, above-mentioned top layer is subdivided into into the central top of tire equator surface side and this is configured at
The tire shoulder top in two outsides of central top, and above-mentioned central top is further divided into form the central authorities top of tread surface
Portion's main part and be configured at the central top main part tire radial direction inner side central top base part.
Therefore, loss tangent value is used for less than the low heat generation rubber of the loss tangent value of central top main part
Central top base part is stated, and elasticity is used for into tire shoulder top higher than the elastic rubber of central top main part, by
This is able to ensure that excellent rolling resistance performance, and can improve turn performance by improving tire shoulder rigidity.
In addition, the base angle θ for being formed into central top of the section in approximate trapezoid shape is reduced to less than 45 °.Therefore, central authorities
Variation in rigidity between top and tire shoulder top is linearly and more smooths such that it is able to because cause from straight trip to turn turn
Become smooth grade and improve transient characteristic.
In addition, in above-mentioned tread rubber, central top is formed by extrusion molding rubber, and by the way that rubber strip is rolled up
Coiled（That is STW）And form bottom and tire shoulder top.Now, although be by based on multilayer rubber extrusion device
Body extrusion molding and form above-mentioned extrusion molding rubber, but because above-mentioned extrusion molding rubber is double-layer structural, it is possible to high
Precision and it is stably formed the tip portion J with base angle θ such that it is able to play higher above-mentioned transient characteristic.
Further, the bottom and tire shoulder top beyond central top is formed by STW is then passed through, it is possible to making above-mentioned
Central top is common, and can form tread rubber according to various tire size such that it is able to realize multilayer rubber extrusion dress
Extruder head, the reduction of the species of tube head put.
In addition, winding curl with the condition of high temperature by the rubber strip that will be extruded from the batch extruders of gear pump type
To form above-mentioned tire shoulder top.Due to the rubber strip of the condition of high temperature it is more soft, so adjacent central top will not be made
Tip portion deform, the tip portion can be followed and formed at the top of tire shoulder such that it is able to maintain the shape of tip portion
Shape.
In addition, in recent years, in order to improve wet road adherence properties, it is desirable to by the shared ratio in rubber intensive of silica
The rubber of the high silicon dioxide proportioning of the mass parts more than 75% is used as the rubber of tread surface side.However, due to high titanium dioxide
The cementability of the rubber of silicon proportioning is poor, so generally when the rubber of high silicon dioxide proportioning is employed in STW, rubber strip
Bonding between band becomes insufficient, it is possible to cause to crack equivalent damage at its interface in the process of moving.However, due to
There is at high operating temperatures sufficient cementability, so in the situation that the rubber of high silicon dioxide proportioning is used for rubber strip
Under, as long as being wound at high operating temperatures, it becomes possible to suppress crackle equivalent damage.
Description of the drawings
Fig. 1 is the sectional view of an embodiment of the motorcycle tire for illustrating the present invention.
Fig. 2 is the sectional view of the fetus face for schematically showing above-mentioned motorcycle tire.
Fig. 3 is the sectional view for illustrating bottom forming step and central top forming step.
Fig. 4 is the sectional view for illustrating tire shoulder top forming step.
Fig. 5 is to illustrate the first rubber strip, the stereogram of the second rubber strip.
Fig. 6 is the side of the supply condition for illustrating the first rubber strip in bottom forming step.
Fig. 7 is the side of the supply condition for illustrating the second rubber strip in the forming step of tire shoulder top.
Fig. 8（A）～Fig. 8（D）It is the sectional view of the construction for schematically showing the tread rubber in table 2.
Fig. 9（A）It is the sectional view for schematically showing existing tread rubber, Fig. 9（B）It is to schematically show the present inventor
The sectional view of the tread rubber for being proposed.
Description of reference numerals：
2 ... fetus faces；2S ... tread surfaces；10 ... bottoms；10A ... tyre surfaces side glue portion；10B ... links rubber section；
11 ... top layers；12 ... central tops；12A ... central top main parts；12B ... central top base parts；13 ... tire shoulder tops
Portion；15 ... extrusion molding rubber；16 ... extrusion molding articles；20 ... rubber strips；The rubber strip of 20A, 20B ... first, second；
21 ... roll of strip are around product；30 ... forming cylinders；31 ... continuous extruders；32 ... reservoirs；The interval extrusion of 34 ... gear pump types
Machine；Co ... equatorial planes；G ... tread rubbers；S1 ... bottom forming step；S2 ... central top forming step；S3 ... tire shoulders top
Portion's forming step；Te ... tyre surface ends；TW ... tread widths.
Specific embodiment
Hereinafter, embodiments of the present invention are described in detail.
In FIG, for the motorcycle tire 1 of present embodiment, tread surface 2S of its fetus face 2 is from tire
Equatorial plane Co to the bending of tyre surface end Te extend into tire axial straight line between dome arcuation, and above-mentioned tyre surface end Te, Te away from
From that is, tread width TW constitute tire Breadth Maximum.Thereby, it is possible to carry out motorcycle so that vehicle body is significantly obliquely turned
Distinctive turning driving.
In addition, motorcycle tire 1 is configured with：The tyre bead of bead part 4 is reached from above-mentioned fetus face 2 through sidewall 3
The carcass 6 of core 5；And the radial outside in above-mentioned carcass 6 and the tyre surface reinforcing cord layer 7 of the configuration of the inner side in fetus face 2.
Above-mentioned carcass 6 is formed as including at least one of which carcass ply, is formed as including one layer of carcass ply 6A in this example,
Carcass ply 6A is by the way that body cord is for example constituted relative to tire is circumferential so that 70～90 ° of angle is arranged.The carcass
Cord 6A across the two ends of the cord main part 6a between bead core 5,5, with the way of being connected with main part 6a around
Return portion 6b that above-mentioned bead core 5 is turned back and engaged from tire axial inside facing outward side.In addition, in the cord main part 6a and folding
Return between portion 6b, be configured with the bead apex 8 of the tyre bead reinforcement extended towards radial outside from above-mentioned bead core 5.
In addition, as above-mentioned tyre surface reinforcing cord layer 7, by belt cord is circumferential for example with 10～60 ° relative to tire
Angle arrangement more than one layer belt composition, the band beam being made up of two-layer belt ply 9A, 9B is shown in this example
Layer 9.However, as tyre surface reinforcing cord layer 7, additionally it is possible to replace above-mentioned belt 9 and adopt by band cord is all in tire
Scroll up the string course that helically wound band cord is constituted, in addition can also ditch use both belt 9 and string course.Make
For above-mentioned body cord, belt cord and band cord, for example, can preferably use nylon, artificial silk, polyester, fragrant adoption
The existing tyre cord such as acid amides.
Next, as illustrated schematically in fig. 2, in above-mentioned motorcycle tire 1, the tread rubber G of above-mentioned fetus face 2 is formed
It is divided into the bottom extended throughout tread width TW（base）Layer 10 and be configured at the bottom 10 tire radial outside top
（cap）Layer 11.
Wherein, above-mentioned bottom 10 is configured to include：It is in approximate three to be configured at the tire axial two ends of tread rubber G, section
The tyre surface side glue portion 10A of angular shape；And link rubber section 10B that will link between the tyre surface side glue portion 10A, 10A.The bottom
Layer 10 is made up of rubber excellent in adhesion, so as to improve between above-mentioned tyre surface reinforcing cord layer 7 and tread rubber G and tire
Adhesive strength between side glue and tread rubber G.
In addition, above-mentioned top layer 11 is divided into the central top 12 of equatorial plane Co sides and is configured at the central top
13,13 at the top of the tire shoulder in 12 outside of tire axial two, and above-mentioned central top 12 is subdivided into form tread surface 2S
Central top main part 12A and be configured at central top main part 12A tire radial direction inner side central top substrate
Part 12B.
Also, loss tangent value tan δ is low less than the loss tangent value tan δ of above-mentioned central top main part 12A
Heat generation rubber is used for above-mentioned central top base part 12B, and complex modulus E* is more than into above-mentioned central top main body
The elastomeric rubber of the complex modulus E* of part 12A is used for above-mentioned tire shoulder top 13.
As a result, due to forming above-mentioned central top base part 12B by low heat generation rubber, thus improve straight trip row
Rolling resistance performance when sailing.Wherein, because the shared ratio in whole running time of turning time is minimum, so substantially
Can avoid because not having undesirable effect to rolling resistance performance with setting low heat generation rubber in shoulder-side.Further, since by
Elastomeric rubber forms above-mentioned tire shoulder top 13 and not in shoulder-side with heat generation rubber is set low, also will low heat generation rubber
Glue（Central top base part 12B）The radially inner side of central top main part 12A is only configured at, therefore, it is possible to fully raising
Tire shoulder rigidity such that it is able to greatly improve turn performance.
Width W1 of the above-mentioned central top 12 in tread surface 2S（Shown in Fig. 1）, the tire being preferably in during straight trip traveling
The scope of 1.2 times of ground width W0 of face surface 2S～2.0 times.At 1.2 times of above-mentioned width W1 insufficient groundings width W0
In the case of, the regional extent constriction of low heat generation rubber, the raising effect of rolling resistance performance becomes insufficient, if conversely, on
2.0 times of width W1 more than ground width W0 are stated, then the raising effect of turn performance becomes insufficient.In addition, central top base
The thickness t of bottom point 12B, preferably 0.1 times of the integral thickness T of central top 12～0.3 times.If above-mentioned thickness t deficiencies are whole
0.1 times of body thickness T, then the raising effect of rolling resistance performance becomes insufficient, if conversely, above-mentioned thickness t exceedes overall thickness
0.3 times of degree T, then can be presented below as tendency：Central top base part 12B is exposed in abrasion latter stage and causes control stability
Decline.
Wherein, above-mentioned " ground width W0 " is referred to, regular wheel rim is assembled into wheel rim and the state of regular internal pressure is filled with
Under tire it is ground plane, along tread surface when loading regular load and being contacted with plane ground with 0 ° of camber angle
Breadth Maximum.In addition, above-mentioned " regular wheel rim " is referred to, according to every in the schematism of the specification comprising tire institute foundation
Individual tire specifies the wheel rim of the specification, if such as JATMA then means standard rim, if TRA then means " Design
Rim ", if or ETRTO then mean " Measuring Rim ".Above-mentioned " regular internal pressure " is referred to, according to each tire regulation
The air pressure of above-mentioned specification, if JATMA then means highest air pressure, if TRA then means table " TIRE LOAD LIMITS
Described maximum in AT VARIOUS COLD INFLATION PRESSURES ", if ETRTO then means
“INFLATION PRESSURE”.Above-mentioned " regular load ", refers to the load for specifying above-mentioned specification according to each tire, if
JATMA is then maximum load capability, if TRA is then table " TIRE LOAD LIMITS AT VARIOUS COLD
Described maximum in INFLATION PRESSURES ", if ETRTO is then " LOAD CAPACITY ".
Herein, for the little rubber of loss tangent value tan δ, its caoutchouc elasticity is relatively low.Therefore, in this example
In tread rubber G, when the tangent penalty values of its rubber being set to into tan δ 1 and are answered for above-mentioned central top base part 12B
Elastic modelling quantity is set to E*1, the tangent penalty values of its rubber is set to into tan δ 2 for above-mentioned central top main part 12A and is incited somebody to action
Its complex modulus is set to E*2, the loss of the tangent of its rubber is set to into tan δ 3 and by its complex elasticity for above-mentioned tire shoulder top 13
When modulus is set to E*3, following relation is met（1）、（2）.
The ＜ tan δ 3--- of 1 ＜ tan δ of tan δ 2（1）
E*1 ＜ E*2 ＜ E*3---（2）
Though particular determination is not carried out, according to the viewpoint of rolling resistance performance, the rubber of central top base part 12B
Tangent penalty values tan δ 1 is preferably less than 0.10, more preferably less than 0.08, additionally, according to the viewpoint of control stability, it is above-mentioned
The complex modulus E*3 of the rubber at tire shoulder top 13 is preferably more than 5.0MPa, more preferably more than 5.5MPa.
Wherein, for tangent penalty values tan δ and complex modulus E*, it is set to according to JIS-K6394's
Specify and use under conditions of shown below value obtained by " viscoplasticity spectrometer " measurement.Above-mentioned condition is：Initial strain
（10%）, amplitude（±2%）, frequency（10Hz）, deformation pattern（Stretching）, measurement temperature（30℃）.
In addition, above-mentioned central top 12 is formed as section in approximate trapezoid shape, the tire axial length of its inner radial surface
More than the tire axial length of radially-outer surface, and base angle θ is less than 45 °.So, due to by above-mentioned base angle θ be set to compared with
It is little, so the variation in rigidity between 13 at the top of central top 12 and tire shoulder is linearly and more smooths, make from straight trip to turning
Conversion become smooth such that it is able to improve from straight trip to turn transient characteristic.In the case where above-mentioned base angle θ is more than 45 °,
Variation in rigidity becomes drastically, so as to cause above-mentioned transient characteristic to decline.Wherein, though the non-particular determination of the lower limit of base angle θ, such as
It is really too small, then in the formation of extrusion molding rubber, conveying when, paste when etc. easily make tip portion J deform, so as to be in
The tendency for now making workability impaired.According to this viewpoint, the lower limit of above-mentioned base angle θ is preferably more than 15 °.Additionally, in section
The tire axial length for being formed as the inner radial surface of above-mentioned central top 12 is less than the tire axial length of its radially-outer surface
Approximate trapezoid shape in the case of, due to the regional extent constriction of low heat generation rubber, therefore, it is difficult to fully improving rolling resistance
Performance.
In addition, in this example, in order to improve wet road adherence properties, for above-mentioned central top main part 12A and above-mentioned
For tire shoulder top 13, adopt the shared ratio in rubber intensive of silica as the high by two of more than 75% mass parts
The rubber of silica proportioning.
Next, in above-mentioned tread rubber G, above-mentioned central top 12 is by the extrusion molding rubber for by section being in approximate trapezoid shape
Extrusion molding article 16 of the glue 15 after the circle of winding one in tire circumference is constituted, in addition, above-mentioned bottom 10 is distinguished with tire shoulder top 13
Formed around product 21 by the rubber strip 20 of banding is wound into into spiral helicine roll of strip.
The reason for this is that in the situation for carrying out one extrusion molding to whole tread rubber G using multilayer rubber extrusion device
Under, due to cannot control exactly the rubber in extruder head flowing, so cannot high accuracy and be stably formed it is above-mentioned central authorities top
The base angle θ in portion 12, tip portion J, so as to the decline of transient characteristic can be caused.In addition, by by rubber strip winding into
（STW）Helical form and in the case of forming whole tread rubber G, also cannot accurately form above-mentioned base angle θ, tip portion J, from
And transient characteristic can also declined.
Therefore, in the present invention, only formed using the extrusion molding rubber 15 based on multilayer rubber extrusion device extrusion
Central top 12.Above-mentioned central top 12 due to be central top main part 12A and central top base part 12B bilayer
Construction, it is possible to using double-layer rubber extrusion device high accuracy and being stably formed above-mentioned base angle θ, tip portion J.
In addition, forming the bottom 10 and tire shoulder top 13 as remainder by STW.Therefore, it is possible to make central top
Portion 12 is common, and forms tread rubber G according to various tire size such that it is able to realize the extrusion of multilayer rubber extrusion device
Head, the reduction of the species of tube head.
Next, illustrating to the manufacture method of above-mentioned motorcycle tire 1.The manufacture method is when green tire 1 is manufactured
Including the tread rubber formation process for forming tread rubber G, as shown in Figure 3,4, the tread rubber formation process has：
（1）On forming cylinder 30, banded first rubber strip 20A is wound into curl, be consequently formed above-mentioned
Bottom forming step S1 of bottom 10；
（2）In link rubber section 10B of above-mentioned bottom 10, by the section extruded from extrusion shaping machine and be molded in approximate
The winding of extrusion molding rubber 15 one of trapezoidal shape is enclosed, and is consequently formed central top forming step S2 of central top 12；
（3）Between above-mentioned central top 12 and the tyre surface side glue portion 10A of above-mentioned bottom 10, by the second rubber of banding
Band 20B winds curl, is consequently formed tire shoulder top forming step S3 at tire shoulder top 13.
As shown in figure 5, the first rubber strip, second rubber strip 20A, 20B are relatively thin shoestring, can use
The shoestring of the existing size used in STW.
Also, in above-mentioned bottom forming step S1, as shown in fig. 6, continuously extruding above-mentioned using continuous extruder 31
One rubber strip 20A, and after extrusion first rubber strip 20A, first rubber strip 20A is carried out with U-shaped
Repeatedly turn back, and first rubber is supplied towards forming cylinder 30 via the reservoir 32 for temporarily storing first rubber strip 20A
Adhesive tape band 20A is simultaneously wound into helical form.
As above-mentioned continuous extruder 31, for example, preferably adopt screw-type extruder.This screw-type extruder, its rubber
Discharge rate significantly changes because of internal pressure.Therefore, in order to the cross sectional shape for specifying high accuracy and stably to rubber strip
Band 20A carries out extrusion molding, needs to make extruder continuously run and remain internal pressure invariable.On the other hand, exist
In forming cylinder 30, need to make extruder intermittent running in order to take out tread rubber G etc., thus via reservoir 32 with into
The mode of the synchronization of type cylinder 30 intermittently supplies rubber strip 20A.
In above-mentioned reservoir 32, the very long rubber strip needed for for forming such as one tread rubber G is stored
20A.Therefore, the temperature of rubber strip 20A is reduced during storing, so that rubber strip 20A is for example 30 DEG C～40
DEG C or so low-temperature condition under supply towards forming cylinder 30.
On the other hand, in forming step S3 at the top of above-mentioned tire shoulder, as shown in fig. 7, being extruded using the interval of gear pump type
Machine 34 intermittently extrudes above-mentioned second rubber strip 20B, and the height by second rubber strip 20B after just extruding
Helical form is supplied towards forming cylinder 30 and is wound under temperature state.
As shown in the drawing, the batch extruders 34 of said gear pump type are configured in the front end of screw-type extruder main body 36
It is equipped with the known construction of gear pump 37.The batch extruders 34 quantitatively extrude gear 37A by the rotation of gear 37A
Roller seating space 37A1 in rubber.It is therefore not necessary to via above-mentioned reservoir 32, just can be by the ON/OFF that rotates to gear
Control and in the mode synchronous with above-mentioned forming cylinder 30 intermittently and in the condition of high temperature（Such as 75 DEG C～85 DEG C）Lower supply
Rubber strip 20A.
Herein, it is well known that the rubber strip under the condition of high temperature is more soft and excellent in adhesion.It is therefore not necessary to make just
The central top 12 just pasted（Extrusion molding article 16）Tip portion J deform, tip portion J can be followed and formed
Tire shoulder top 13 such that it is able to maintain the shape of tip portion.
In addition, the rubber of high silicon dioxide proportioning is several when having the property of cementability difference, such as a temperature below 40 DEG C
Not bonding.However, due to being that the second rubber strip 20B is pasted under the above-mentioned condition of high temperature, so as shown in this example, even if
In the case that the rubber of the high silicon dioxide proportioning is used for into the second rubber strip 20B, it is also possible to substantially ensure that rubber strip 20B
Between adhesive strength such that it is able to suppression crack at its interface.
Though in addition, being illustrated, tyre surface reinforcement can also be pre-formed on the outer surface of above-mentioned forming cylinder 30
Cord ply 7.In addition, forming cylinder 30 can be the rigid neutron of green tire formation.Above-mentioned rigid neutron is referred to, for outside it
Surface is pasted tire structure member and makes green tire be formed close to the interior metal mould of finished tire successively, normal conditions
Under, green tire is put in sulfurizing mould together with the rigid neutron and sulfidization molding is carried out.
Although being described in detail to the particularly preferred embodiment of the present invention above, the invention is not restricted to diagram
Embodiment, additionally it is possible to be deformed into various modes to implement.
[embodiment]
（A）Specification according to table 2 has manufactured experimently the rubbing for 180/55R17 with the in-built tire size shown in Fig. 1
Tire for vehicles, and the control stability to confession examination tire, rolling resistance performance, transient characteristic is ask to be tested.Fig. 8（A）
～Fig. 8（D）In show each tire tread rubber construction, in addition, showing the rubber a～d's used at each position in table 1
Tangent penalty values tan δ, complex modulus E*, silica proportional quantity.
Wherein, for each tread rubber, by the only shape using the extrusion molding rubber of rubber extruding device one extrusion
(surrounded with thick line) into central top, by the rubber strip that make use of under the condition of high temperature of gear pump type batch extruders supply
The STW (sometimes referred to as high temperature STW) of band and form tire shoulder top, by having used what is supplied via reservoir from continuous extruder
The STW (sometimes referred to as low temperature STW) of the rubber strip under low-temperature condition and form remainder.
<Control stability, transient characteristic>
Motorcycle (750cc) will be assemblied under conditions of wheel rim (17 × MT5.50), internal pressure (290kPa) for trying tire
Trailing wheel, for control stability when real vehicle is travelled on runway is tested and from straight trip to the smoothness turned, (transition is special
Property), evaluated by the sensory experience of driver, and represent test result so that comparative example 1 to be set to 100 index.Number
Value is the bigger the better.Wherein, front-wheel has used the commercially available tire of tire size (120/70R17).
<Rolling resistance performance>
Using rolling resistance test machine determine wheel rim (17 × MT5.50), internal pressure (290kPa), load (1.3kN),
Rolling resistance when travelling under conditions of speed (80km/h), and test knot is represented so that comparative example 1 to be set to 100 index
Really.Numerical value is less to show that rolling resistance performance is more excellent.
[table 1]
| Rubber a | Rubber b | Rubber c | Rubber d | |
| Loss tangent value tan δ | 0.20 | 0.08 | 0.25 | 0.08 |
| Complex modulus E* (Mpa) | 5.5 | 3.5 | 6.5 | 3.5 |
| Silica proportional quantity (w%) | 98 | 0 | 85 | 75 |
[table 2]
As shown in table 2, it is able to confirm that：The tire of embodiment can improve simultaneously rolling resistance performance, control stability, with
And from straight trip to the transiting performance turned.
（B）Trial-production is forming Fig. 8（C）Formed in such a way during the tread rubber of shown construction involved in the present invention
Motorcycle tire：
（a）Formed beyond link rubber section p using the extrusion molding rubber extruded by 4 layers of rubber extruding device one
Position（As link rubber section p, and sheet material has been pasted in addition）；
（b）Each portion is formed by low temperature STW；
（c）Central top is only formed using the extrusion molding rubber of one extrusion, by low temperature STW tire shoulder top is formed
Portion and bottom；
（d）Central top is only formed using the extrusion molding rubber of one extrusion, by high temperature STW tire shoulder top is formed
Portion, by low temperature STW bottom is formed,
Also, above-mentioned control stability, rolling resistance performance, transient characteristic are measured, on this basis, using dislocation
Speckle interferometry（Shearography）Checked gas residue situation.
＜ gas residues ＞
The number at the position of gas residue in tread rubber is checked using speckle-shearing interferometry.Using 5 tires
Mean value is representing result.The mean value is more low better.
[table 3]
As shown in table 3, it is able to confirm that：For the tire of tread rubber is formed only by one extrusion, it is transitional
Can be poor.In addition it is possible to confirm：For the tire of tread rubber is pasted with by low temperature STW, due to its cementability it is poor,
So remaining gas in tire after curing.
Claims (3)
1. a kind of motorcycle tire, the tread surface of the fetus face of the motorcycle tire is in from equatorial plane to tyre surface end
The bending of dome arcuation ground extends, and the tire axial air line distance between the tyre surface end that is, tread width composition tire
Breadth Maximum,
The motorcycle tire is characterised by,
Forming the tread rubber of the fetus face includes：The bottom extended throughout tread width；With the tire for being configured at the bottom
The top layer of radial outside,
The bottom includes：In tyre surface side glue of the section in subtriangular shape that the tire axial two ends of tread rubber configure
Portion；And the link rubber section that will link between the tyre surface side glue portion,
The top layer includes：The central top of tire equator surface side；With the outside of tire axial two for being configured at the central top
Tire shoulder top,
The central top includes：Form the central top main part of tread surface；Be configured at the central top main part
The central top base part of the tire radial direction inner side divided, and the section of the central top is in approximate trapezoid shape, for this
For approximate trapezoid shape, the tire axial length of its inner radial surface is more than tire axial length and the bottom of its radially-outer surface
Angle θ is less than 45 °,
Also, the central top is made up of extrusion molding article, the extrusion molding article is by all in tire by extrusion molding rubber
Scroll up and formed around a circle,
Also, the bottom and tire shoulder top respectively by by the roll of strip of the rubber strip winding curl of banding around product shape
Into,
When the tangent penalty values of its rubber being set to into tan δ 1 and set its complex modulus for the central top base part
The tangent penalty values of its rubber are set to into tan δ 2 for E*1, for the central top main part and set its complex modulus
For E*2, for the tire shoulder top tangent penalty values of its rubber are set to tan δ 3 and its complex modulus are set to into E*3 when,
Meet following relation (1), (2),
＜ tan δ 3--- (1) of 1 ＜ tan δ of tan δ 2
E*1 ＜ E*2 ＜ E*3--- (2).
2. motorcycle tire according to claim 1, it is characterised in that
The central top main part and tire shoulder top, are existed by the shared ratio in rubber intensive of silica
The rubber of the high silicon dioxide proportioning of more than 75% mass parts is constituted.
3. a kind of tire manufacturing method, using the tire manufacturing method motor vehicle wheel described in claim 1 or 2 is formed
Tire, the tire manufacturing method is characterised by,
Including the tread rubber formation process for forming tread rubber,
The tread rubber formation process has：
On forming cylinder, by the first rubber strip winding curl of banding, the bottom for being consequently formed the bottom is formed
Step；
In the link rubber section of the bottom, by extrusion of the section extruded from extrusion shaping machine and be molded in approximate trapezoid shape
Molded rubber winding one is enclosed, and is consequently formed the central top forming step of central top；And
Between the central top and the tyre surface side glue portion of the bottom, by the second rubber strip winding of banding into spiral
Shape, the tire shoulder top forming step being consequently formed at the top of tire shoulder,
Also, in the bottom forming step, using continuous extruder first rubber strip is continuously extruded, and
After extruding first rubber strip, first rubber strip is repeatedly turned back with U-shaped, and via temporarily store this
The reservoir of one rubber strip and intermittently supply first rubber strip towards forming cylinder and be wound into helical form,
On the other hand, in forming step at the top of the tire shoulder, using the batch extruders of gear pump type institute is intermittently extruded
The second rubber strip is stated, and will be supplied simultaneously towards forming cylinder under the condition of high temperature of second rubber strip after just extruding
It is wound into helical form.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-193399 | 2012-09-03 | ||
| JP2012193399A JP5750087B2 (en) | 2012-09-03 | 2012-09-03 | Motorcycle tire and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN103660799A CN103660799A (en) | 2014-03-26 |
| CN103660799B true CN103660799B (en) | 2017-04-12 |
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| CN201310394947.0A Active CN103660799B (en) | 2012-09-03 | 2013-09-03 | Motorcycle tyre and making method thereof |
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| JP6790562B2 (en) * | 2016-08-05 | 2020-11-25 | 住友ゴム工業株式会社 | Tires for two-wheeled vehicles |
| JP2018199274A (en) * | 2017-05-29 | 2018-12-20 | 東洋ゴム工業株式会社 | Bead filler molding apparatus |
| JP7024477B2 (en) * | 2018-02-13 | 2022-02-24 | 住友ゴム工業株式会社 | Tire manufacturing method and tires |
| DE102019209865A1 (en) * | 2019-07-04 | 2021-01-07 | Continental Reifen Deutschland Gmbh | Method for producing a pneumatic vehicle tire, use of strip winding for winding one or more rubber components, device for carrying out the method and a pneumatic vehicle tire which can be produced or produced according to the method |
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| CN1833889A (en) * | 2005-03-15 | 2006-09-20 | 住友橡胶工业株式会社 | Tire for two-wheeled vehicle and manufacturing method of the same |
| JP2008179159A (en) * | 2008-03-19 | 2008-08-07 | Bridgestone Corp | Pneumatic tire for automatic two-wheeled vehicle and its manufacturing method |
| WO2009019831A1 (en) * | 2007-08-03 | 2009-02-12 | Sumitomo Rubber Industries, Ltd. | Tire for two-wheeled motor vehicle |
| CN101376321A (en) * | 2007-08-28 | 2009-03-04 | 住友橡胶工业株式会社 | Pneumatic tire and tire manufacturing method |
| WO2009031269A1 (en) * | 2007-09-06 | 2009-03-12 | Sumitomo Rubber Industries, Ltd. | Tire for two-wheeled motor vehicle and method of manufacturing the same |
| WO2009037805A1 (en) * | 2007-09-18 | 2009-03-26 | Sumitomo Rubber Industries, Ltd. | Tire for motor-bicycle |
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|---|---|---|---|---|
| JP4377871B2 (en) * | 2005-11-09 | 2009-12-02 | 住友ゴム工業株式会社 | Motorcycle tires |
| JP5249596B2 (en) * | 2008-02-04 | 2013-07-31 | 住友ゴム工業株式会社 | Rubber strip conveyor |
| JP2010253876A (en) * | 2009-04-28 | 2010-11-11 | Bridgestone Corp | Rubber ribbon conveying device, and method for manufacturing unvulcanized tire using the conveying device |
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|---|---|---|---|---|
| CN1833889A (en) * | 2005-03-15 | 2006-09-20 | 住友橡胶工业株式会社 | Tire for two-wheeled vehicle and manufacturing method of the same |
| WO2009019831A1 (en) * | 2007-08-03 | 2009-02-12 | Sumitomo Rubber Industries, Ltd. | Tire for two-wheeled motor vehicle |
| CN101376321A (en) * | 2007-08-28 | 2009-03-04 | 住友橡胶工业株式会社 | Pneumatic tire and tire manufacturing method |
| WO2009031269A1 (en) * | 2007-09-06 | 2009-03-12 | Sumitomo Rubber Industries, Ltd. | Tire for two-wheeled motor vehicle and method of manufacturing the same |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5750087B2 (en) | 2015-07-15 |
| JP2014046885A (en) | 2014-03-17 |
| CN103660799A (en) | 2014-03-26 |
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