CN1954996A - Method for manufacturing low noise pneumatic tire - Google Patents
Method for manufacturing low noise pneumatic tire Download PDFInfo
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- CN1954996A CN1954996A CNA2006101506783A CN200610150678A CN1954996A CN 1954996 A CN1954996 A CN 1954996A CN A2006101506783 A CNA2006101506783 A CN A2006101506783A CN 200610150678 A CN200610150678 A CN 200610150678A CN 1954996 A CN1954996 A CN 1954996A
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- inner liner
- tacky
- polishing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C19/00—Tyre parts or constructions not otherwise provided for
- B60C19/002—Noise damping elements provided in the tyre structure or attached thereto, e.g. in the tyre interior
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Abstract
The present invention discloses a pneumatic tire having a noise damper, a method for manufacturing the same, and a method for fixing the damper to the tire. The inner surface of the tread portion of the vulcanized tire is buffed, and the noise damper is fixed to the buffed inner surface, using a double-sided adhesive tape which has specific characteristics such as adhesive force, tensile strength, thickness, cold-resistant property, heat-resistant property and water-resistant property.
Description
Technical field
The present invention relates to the airtyred method that a kind of manufacturing has noise silencer (noise damper), more specifically, relate to a kind of method that noise silencer is fixed to tire curing inner surface.
Background technology
In order to be reduced in the tire noise that produces between on-stream period, provide with sponge material and made and be arranged on noise silencer in the tire chamber, for example Japanese Patent Application 2003-063208 number disclosed.This noise silencer prevents or interrupts the sympathetic response in tire chamber, promptly is filled in the vibration of air wherein.In addition, because noise silencer sticks to the inboard of fetus face, can reduce the vibration of fetus face.
Between on-stream period, the part in the feasible piece that contacts to earth of fetus face distortion becomes, and remaining major part is generally cylindrical than putting down.Therefore, the border between flat part and column part has relatively little radius of curvature.Border with such small curvature radius relatively moves around tire axle when tire rotates.Therefore, the noise silencer that is fixed to the inner surface of fetus face repeatedly suffers flexural deformation and compression stretching strain.
Therefore, in long-term the use or at high temperature or under the perishing condition of work, noise silencer may be tending towards partly separating from tire.
On the other hand, the tacky on two sides band is extensive use of in various fields as a kind of simple fixing means that is easy to now.But the long-term use in pneumatic tire still is the application of unknown classification for the tacky on two sides band, does not set up the method for tacky on two sides band to the applicability of tire of estimating as yet.
Summary of the invention
Therefore, the purpose of this invention is to provide the airtyred method that a kind of manufacturing has noise silencer,, can stablize and closely noise silencer is fixed to the inner surface of fetus face wherein by using the tacky on two sides band of selecting according to new standard.
According to the present invention, the airtyred method that a kind of manufacturing has noise silencer may further comprise the steps: the preparation vulcanized tyre; The inner surface of the fetus face of polishing tire; With by using the tacky on two sides band that noise silencer is fixed to the inner surface that has polished, wherein
Noise silencer proportion be 0.005 to 0.060 sponge material make and
When measuring according to T shape discrete testing under 25 ℃, the scope of the adhesion of tacky on two sides band is for being not less than 1.8 newton/20mm bandwidth.
According to the result of study that the inventor did, set up the new standard of tacky on two sides band.In view of the above, the tacky on two sides band must have the adhesion in above-mentioned scope, and wishes further to satisfy following condition:
(1) the tacky on two sides band has cold-resistant characteristic, and promptly when adhesive tape experienced 90 degree slip crooked tests under-35 ℃, the tacky on two sides band is not destroyed not to be separated with object (being noise silencer and rubber for tire);
(2) the tacky on two sides band has heat-resistant quality, and promptly when adhesive tape carried out T shape discrete testing under 120 ℃, the tacky on two sides band is not destroyed not to be separated with object, thereby, in noise silencer, cause cohesional failure (cohesion failure); With
(3) the tacky on two sides band has water-proofing performance, and promptly when adhesive tape carried out the wet discrete testing of T shape, the tacky on two sides band is not destroyed not to be separated with object, thereby, in noise silencer, cause cohesional failure.
And then, also find, preferably:
(4) it is wide that the hot strength of tacky on two sides band is at least 10 newton/10mm;
(5) thickness of tacky on two sides band is 0.38mm to the maximum; With
(6) the tacky on two sides band has two-layer different pressure-sensitive adhesive, and one deck is applicable to rubber for tire, and another layer is applicable to noise silencer.
*Definition
*T shape discrete testing
In this manual, T shape discrete testing is defined as follows:
At first, make specimen TP as shown in Figure 7, wherein identical with the material of noise silencer sponge strip 4S adheres to a side 5a of tacky on two sides band 5, and the rubber strip 9S identical with the interior surface layers material of tire adheres to opposite side 5b.
For bar 4S and 9S are fully adhered on the adhesive tape, with the speed of the load of 10kg, 300mm/ minute that rubber rollers is reciprocal twice on each bar, at room temperature kept then specimen TP72 hour.
As shown in Figure 8, specimen TP is attached on the stretching testing machine with "T"-shaped form, and bar 4S and 9S among one of them non-adhesion section M are drawn in the opposite direction with 300mm/ minute speed.
Measure the pulling force (N) when bar 4S or 9S begin to separate with the tacky on two sides band
*T shape discrete testing under 25 ℃
This test literally means that T shape discrete testing carries out under about 25 ℃.For the purpose of accurately, the test of T shape is to adopt tolerance to carry out for the specimen of 25 ℃ of ± 2 ℃ normal temperature.
*T shape discrete testing under 120 ℃
This test meaning is that T shape discrete testing is to adopt the specimen of heating to carry out.Specifically, specimen be placed into tolerance in ± 2 ℃ 120 ℃ the stove so that be heated to this temperature.Then, specimen is therefrom taken out, T shape discrete testing carries out in after hot specimen is taken out 2 minutes at normal temperatures.
*The T shape discrete testing method that wets
This test meaning is that T shape discrete testing adopts wet specimen to carry out.Specimen TP immersed in the water 72 hours.Take out specimen then, T shape discrete testing carries out in after wet specimen is taken out 2 minutes.
*90 degree slip crooked tests
In this manual, 90 degree slip crooked tests are defined as follows.In this test, adopt aforesaid specimen TP and testboard M.As shown in Figure 9, testboard M has two orthogonal smooth flat (horizontal plane P1 and vertical plane P2), and the angle CP between them is with the radius rounding of 1mm.Specimen TP at first is placed on and makes rubber strip 9S and plane contact on one of two faces.Only with the two ends of rubber strip 9S with clampings such as chuck, clips.Then, specimen TP slides on another by angle CP from above-mentioned plane, and keeps contacting of rubber strip 9S and face.The speed that TP passes angle CP is 2cm/ second.Fully by behind the CP of angle, whether whether visual inspection specimen TP have adhesive tape 5 to separate, have sponge strip to destroy at adhesive tape 5.
*90 degree slip crooked tests under-35 ℃
This test meaning is that 90 degree slip crooked tests adopt freezing specimen to carry out.Specifically, specimen is put into tolerance and is ± 2 ℃-35 ℃ refrigerating chamber 1 hour.Then, therefrom take out specimen, 90 degree slip crooked tests carry out in after freezing specimen is taken out 2 minutes at normal temperatures.
*Proportion
The proportion of sponge material is based on that the apparent density measured according to the K6400 of Japanese Industrial Standards " soft polyurethane foam method of testing (soft urethane foam test method) " the 5th section " apparent density (apparentdensity) " determines.
According to the following description, of the present invention other can be showed more fully with further purpose, feature and advantage.
Description of drawings
To describe embodiments of the present invention in detail with reference to the accompanying drawings now.
Fig. 1 is the cross-sectional view according to the assembly of pneumatic tire that has a noise silencer of the present invention and wheel rim.
Fig. 2 is the schematic cross section along the assembly of the A-A line acquisition of Fig. 1.
Fig. 3 is the schematic cross section of tire of method of explaining the inner surface of polishing fetus face.
Fig. 4 is the amplification cross-sectional view of polished surface.
Fig. 5 is the airtyred cross-sectional view that is stained with noise silencer.
Fig. 6 is the cross-sectional view of another example of noise silencer.
Fig. 7 is the exploded perspective view of specimen that is used to evaluate and test the adhesion characteristics of tacky on two sides band.
Fig. 8 is a schematic diagram of explaining T shape discrete testing.
Fig. 9 a, 9b and 9c are the schematic diagrames that is used to explain 90 degree slip crooked tests.
The specific embodiment
According to the present invention, pneumatic tire 3 has the toroid ducted body, and it comprises the bead part 3b and a pair of 3s of sidewall portion that extends of fetus face 3t, a pair of axially spaced-apart between tread edge and bead part 3b, and noise silencer 4 is arranged in the ducted body of tire.Usually, ducted body comprises following enhancing structure: be arranged on the bead core 11 among each bead part 3b; The carcass 6 of extend past fetus face 3t and the 3s of sidewall portion between bead part 3b; Be arranged on the belt 10 of the radial outside of the carcass 6 among the fetus face 3t.
The interior surface layers of tire is made by air-locked rubber compound.Usually, the inner liner 9 that separates with the carcass 6 inner surface 3i with the covering tire is set.But, can use the carcass top to cover rubber and not adopt inner liner separately as airtight rubber layer.
In this embodiment, pneumatic tire 3 is the meridian cord formula tires that are used for passenger vehicle, and noise silencer 4 adheres on the inner surface 3ti of fetus face 3t.
Tire is installed on the wheel rim 2, the sealing tire chamber i that the tire hollow bulb is formed for inflating.Noise silencer 4 is limited in the tire chamber.
At this, standard rim is by the tire wheel rim of normal structure official approval, and normal structure is JATMA (Japan and Asia), T﹠amp; RA (North America), ETRTO (Europe), STRO (Scandinavia) etc.Normal pressure of below mentioning and standard tire load are maximum gas pressure that is used for tire and the maximum tire loads of being stipulated in air pressure/peak load table or analogous list by homologue.For example, standard rim is stipulated " standard rim (standardrim) " in JATMA, " the measuring wheel rim (Measuring Rim) " of stipulating in ETRTO, " the design wheel rim (Design Rim) " stipulated in TRA etc.Normal pressure is stipulated " maximum gas pressure (maximum air pressure) " in JATMA, " the blowing pressure (the Inflation Pressure) " that in ETRTO, stipulates, given maximum pressure etc. in " under various cold the blowing pressures loading of tire restriction (Tire Load Limits at Various Cold Inflation Pressures) " in TRA.Gauge load is stipulated " peak load ability (maximum loadcapacity) " in JATMA, " load-bearing capacity (the Load Capacity) " that in ETRTO, stipulates, in TRA above-mentioned table given maximum etc.But under the situation of passenger tyre, normal pressure and standard tire load as one man are defined as 88% of 200kPa and maximum tire load respectively.
Above-mentioned carcass 6 is made of at least one casing ply 6A, its cord radially is provided with the angle in 70 to the 90 degree scopes with respect to tire equator C, described casing ply is extend past fetus face and sidewall portion between bead part, and the bead core in each bead part 11 from tire axially in side direction roll to form a pair of 6b of portion and the therebetween main part 6a of rolling outside axially.In this embodiment, carcass 6 is made of the single casing ply 6A with the organic fiber cord that radially is provided with respect to tire equator C one-tenth an angle of 90 degrees.
Roll between 6b of portion and the main part 6a at each, the triangular rubber core of being made by the hard rubber compound 8 is set, to strengthen bead part and lower sidewall.Triangular rubber core 8 is from the extension of bead core radial outward and to its radial outer end convergent.
Belt comprises cushion 10---be band alternatively.In this embodiment, belt is made up of cushion 10.
Band is arranged on the radial outside of cushion 10 usually to improve the high speed durability of fetus face.Band has the so-called jointless structure that forms by to become to be not more than at least one cord of angle screw winding of 5 degree with respect to tire equator.
Inner liner 9 is arranged on the inboard of carcass 6 roughly to cover the inner surface of whole tire.Inner liner 9 is made by air-locked rubber compound, and it contains the butyl rubber of at least 60 parts of weight with respect to the whole rubber components of 100 parts of weight.Preferably, butyl rubber content is at least 70 parts of weight, more preferably is at least 80 parts of weight to be up to 100 parts of weight.Furthermore, halogenated butyl rubber can be included as butyl rubber.
Under the situation of content less than 100 parts of weight of butyl rubber, as the remainder of rubber components, can comprise diene rubber, for example natural rubber, butadiene rubber, butadiene-styrene rubber, isoprene rubber, chloroprene rubber, acrylonitrile-butadiene rubber etc.
Usually, air-locked rubber compound can further comprise various additives, for example vulcanizing agent, vulcanization accelerator, antidegradant, reinforcer etc.
In this example, inner liner rubber comprises 70PHR butyl rubber, 30PHR natural rubber, 60PHR carbon black and additive.
Push up the adhesion of covering between the rubber in order to increase inner liner 9 and carcass further, as shown in Figure 4, intermediate layer 12 can be set between them, wherein cover the good adhesion of rubber and inner liner rubber in order to reach relative carcass top, intermediate layer 12 is made by the rubber compound of the diene rubber that comprises 70 parts of weight with respect to the rubber components of 100 parts of weight (particularly preferably being natural rubber) at least, and the maximum ga(u)ge in intermediate layer 12 is 1.0mm.
*Noise silencer
In this embodiment, adopt the open cell type sponge material, more particularly polyurethane foam.
Depend on the environment that uses tire, the air that might charge among the i of tire chamber to the tire inflation is moistening, and then moisture condenses in the tire chamber i of sealing.Therefore, be suitable for adopting the sponge material that is difficult to hydrolysis, such as: the ether polyurethane sponge.
In addition, for anti-sealing infiltrates through in the noise silencer, on sponge material, preferably do water-proofing treatment.And, preferably do mildew-resistant and handle.
In addition, for fear of the toxicity of burning the emission gases that the tire waste material produces, preferably, the raw material that are used to make sponge material do not comprise halogen.
By the sponge material of certain volume is set in the i of tire chamber, can be controlled in the air sympathetic response in the tire chamber, reduce the vibration of fetus face.Therefore, can be reduced in the noise that tyre during produced that travels.
If less than 0.005 or greater than 0.06, just becoming, sponge material proportion is difficult to control the sympathetic response of tire chamber.Therefore, proportion is not less than 0.005, preferably is not less than 0.010, more preferably is not less than 0.016, but is not more than 0.060, preferably is not more than 0.05, more preferably is not more than 0.045.
If the volume V2 of noise silencer 4 just is difficult to reduce significantly noise level less than 0.4% of the volume V 1 in whole tire chamber.Greater than 20% of volume V 1, just be difficult to keep the tire weight balance as fruit volume V2.Therefore, the volume V2 of the sponge material of noise silencer 4 be at least the tire chamber volume V 1 0.4%, preferably be not less than 1.0%, more preferably be not less than 4.0%, but be not more than 20%, preferably be not more than 10%.
Be provided with in the tire chamber under the situation of two or more noise silencers 4, above-mentioned volume V2 refers to the cumulative volume of all noise silencers in tire.
Measure the volume V 1 in tire chamber 4 at the normal inflation Light Condition of tire.At this, the normal inflation Light Condition of tire is meant that tire is installed on the wheel rim and is inflated to normal pressure, but does not have the loaded tire load.In addition, the volume V 1 of tire chamber i can be drawn by following approximate expression (1):
V＝A×{(Di-Dr)/2+Dr}×pi
Wherein
" A " is the cross-sectional area (for example can obtain by computed tomography) in tire chamber,
" Di " is the maximum gauge in tire chamber,
" Dr " is rim diameter, and
" Pi " is pi.
These parameters are to measure under the normal inflation Light Condition of tire.
Consider radial force variation, circular runout etc., preferably, except the end 4e of noise silencer 4, noise silencer 4 has the shape of cross section of constant along its whole circumference length.Under the not interconnective situation in the end of noise silencer, preferably, as shown in Figure 2, end 4e be convergent to prevent friction therebetween.
In addition, in order to prevent the inclination of noise silencer 4 during running at high speed, the height SH of noise silencer 4 preferably is not more than 50mm, more preferably is not more than 30mm, more preferably is not more than 25mm, still, is not less than 10mm, more preferably is not less than 15mm.At this, under tire was not installed to condition on the wheel rim as yet, vertical tire inner surface 3ti measured from tire inner surface 3ti to noise silencer the height SH of 4 least significant end.
Shape of cross section about noise silencer, be preferably symmetric shape, because if shape of cross section is asymmetric, because it is poor in the right-hand side and the lateral stiffness between the left-hand side (rigidity) of noise silencer, noise silencer is easy to during travelling, particularly tilts during running at high speed, thereby the balance of tire changes.
Under the situation of the single noise silencer 4 with symmetrical cross-sections shape, preferably its center is aimed at tire equator C, thus the eccentric load on the noise silencer 4 is minimized, and tilts to prevent noise silencer.
Shape of cross section in this example is rectangle (width W 0=70mm, height SH=30mm), but also can adopt different shape, for example: trapezoidal, triangle, semicircle, parabola/bullet shaped etc.And, can adopt symmetric shape as shown in Figure 6 with two peaks.
*The tacky on two sides band
Adopt tacky on two sides band 5 noise silencer 4 to be fixed to the inner surface of fetus face.
For tacky on two sides band 5, can adopt:
(1) as shown in Figure 7 have coating 5P or an adhesive material layer on a side 5a, and opposite side 5b goes up the adhesive tape of the base band 5S of coating 5P or adhesive material layer,
(2) there is not base band and the adhesive tape only made by the different adhesive material 5P of bilayer, and
(3) adhesive tape of only making by individual layer adhesive material 5P.
For example base band is: plastic sheeting, for example polyester; Plastic foam sheet, for example acrylic foam; Non-woven fibre or composite; Textile etc.
For adhesive material, can suitably adopt, for example rubber based adhesives comprises natural rubber and/or synthetic rubber and additive, described additive is tackifier, softening agent, age resistor etc. for example; Acrylic pressure sensitive adhesives comprises the copolymer of a plurality of acrylate and the polyfunctional monomer with different glass transition temperatures (pressure-sensitive adhesive that comprises anti-high pattern of fever, fire safe type and low temperature adhesive type); The silicone pressure-sensitive adhesive stick comprises silicone rubber and resin; The polyethers adhesive; Polyurethane adhesive etc.
Consider production efficiency, it is not preferred adopting the hot setting adhesive comprise thermosetting resin (for example epoxy resin etc.), and this is because adhesive need be heated to about more than 130 ℃ about 30 minutes.
About adhesive material, can use identical adhesive material, still, in above-mentioned situation (1) and (2), wish to adopt dissimilar adhesive materials.The acrylic pressure sensitive adhesives that for example will adhere to the rubber based adhesives on the rubber for tire securely and adhere to securely on the noise silencer is applied on the corresponding side.
In order to prevent noise silencer 4 separation from tire inner surface 3ti under mal-condition, adhesion has been done quantitative research.Found that if adhesion is the value that is not more than 1.8 newton/20mm width, can prevent to issue estranged from inefficacy at normal driving conditions, this value is the value when adopting as shown in Figure 7 specimen TP to measure according to T shape discrete testing, wherein, specimen TP is made by tacky on two sides band 5, side at adhesive tape applies sponge material bar 4S, applies inner liner rubber strip 9S at the opposite side of adhesive tape.
But preferably, adhesion is 7.0 newton/20mm width to the maximum, so that under the situation that noise silencer destroys for a certain reason, adhesive tape can be removed with noise silencer.
Particularly preferably, when carrying out T shape discrete testing under 25 ℃, sponge material bar 4S is destroyed before separating from adhesive tape 5.That is, be not less than 2.7 newton/20mm width, preferably be not less than 3.3 newton/20mm width at 25 ℃ adhesions.
On the other hand, for prevent adhesive tape 5 owing to cryogenic conditions down sclerosis break, wish when under-35 ℃, carrying out 90 when spending the slip crooked tests, can not take place macroscopicly to break and can not separate.
And, reduce owing to adhesive material under the hot conditions is softening in order to prevent adhesion, when when carrying out T shape discrete testing for 120 ℃, wish that sponge material bar 4S destroyed before separating from adhesive tape 5.
In addition, reduce owing to water penetrates into noise silencer 4,, wish that sponge material bar 4S destroyed before separating from adhesive tape 5 when when carrying out the wet discrete testing of T shape in order to prevent adhesion.
The durability of tacky on two sides band 5 trends towards reducing with the thickness increase.Fetus face bears relatively large flexural deformation at the circumferential end place of the piece that contacts to earth.Therefore, when the viscose glue tape thickness, it is big that the distributed stress between adhesive tape and tire inner surface becomes, and the cohesional failure of adhesive material often takes place.Therefore, preferably, the thickness of tacky on two sides band 5 is not more than 0.38mm.
For the base band 5S of this type of thin adhesive tape, preferably adopt flexible material, such as: acrylic foam.
For example in order to replace the noise silencer of being damaged,, wish that noise silencer 4 can easily remove from tire with adhesive tape perhaps in order to reclaim used tire.Therefore, tacky on two sides band 5 requires to have breakdown strength to a certain degree.Therefore, the breakdown strength of tacky on two sides band 5 is preferably at least 10 newton/10mm width, more preferably for being not less than 15 newton/10mm width.Measure breakdown strength according to the Z0237 of Japanese Industrial Standards " method of testing of pressure sensing adhesive band and bar (Testing methodsof pressure-sensitive adhesive tapes and sheets) ".
In addition, do not have at adhesive tape to be difficult to remove adhesive tape under the situation of base band, i.e. the adhesive material layer.Therefore, consider this point, it is not preferred using such adhesive tape.
*Manufacture method
Available usual way is made pneumatic tire.That is, adopt the tyre building drum with tire base parts, for example tread-rubber, sidewall rubber, tyre bead rubber and triangular rubber core rubber, inner liner rubber, casingply, band bundle casing ply etc. are assembled into the tire base.The tire base is put into sulfurizing mould, inflatable bladder is inserted in the tire hollow bulb.In these cases, applying lubricant or releasing agent between tire and the mould and between tire and the capsule.Then, with the capsule inflation, the heating tire is with vulcanized tyre.After tire cures, from mould, shift out tire.
Commonly known in the art as at tire, capsule is provided with ventilation slot usually on the outer surface to discharge the air between tire inner surface and capsule.But, in this embodiment, having adopted a kind of special bag, its outer surface has smooth part that does not have ventilation slot and the part that has ventilation slot.The position that the position of smooth part is fixed corresponding to noise silencer.
Then, in order to remove releasing agent, the regional Y of the tire inner surface that noise silencer adhered to is polished.That is, the surface of tire curing inner liner 9 is polished annularly along tire equator.The smooth part of above-mentioned capsule is corresponding to regional Y, and therefore regional Y does not have the rib by ventilation slot produced.
In order fully to remove releasing agent, the thickness h of the superficial layer that polishing is fallen need be at least inner liner 9 original depth t 3.0%, be preferably 5.0% or more.But,, just may make the air-tightness and the durability deterioration of inner liner if the thickness h of the superficial layer that polishing is fallen is too big.Therefore, thickness h should be not more than 30% of original depth t, considers operating efficiency and tire production cost, preferably is not more than 10.0%.
If necessary compensation because thickness reduces the air-tightness deterioration that may cause, preferably, the butyl rubber content of inner liner is increased to 70 parts more than the weight, more preferably at 80 parts more than the weight.
In addition, under the situation of finished tire (if being difficult to know original depth), the surface layer thickness h that polishing is fallen is defined as difference t1-t2, wherein
T2 is the thickness that has polished inner liner 9, it is the mean value that is defined as the value of measuring in four that are arranged on three each places of axial location P different places, circumferential measuring position, these three axial location P are: at the position Pc at tire equator C place, at the position Pe at the axial inboard 10mm place of each axial edge Ye of polishing area Y, the i.e. mean value of the value of measuring in place, 12 measuring positions, and
T1 is the original depth of inner liner 9, it is the mean value that is defined as the value of measuring in four of each place that is arranged on two axial location Q different places, circumferential measuring position, described each axial location is the position at 10mm place, the axial outside of each axial edge Ye of polishing area Y, the i.e. mean value of the value of measuring in place, eight measuring positions.
The axial width W1 of polishing area Y has been greater than the width W 0 of sponge material bar, and preferably difference W1-W0 is 5.0mm at least.
Polishing area Y is formed in the maximum axial width WB of belt 10, and preferably the distance from each axial edge of belt 10 to the edge of adjacent polishing area Y is greater than 10.0mm.In the cross section of tire, during travelling, the flexural deformation of the tire under belt is less, and near the flexural deformation of the tire the belt edges increases.Therefore, be desirable to provide axial distance in order to prevent such as destructions such as breaking in the area of reduced thickness Y of inner liner 9 greater than 10.0mm.
As shown in Figure 3, the vulcanized tyre that shifts out from mould is by across between a pair of horizontal parallel driven roller 21 and kept rotatably and vertically around its rotation.For keeping tire vertical, deflector roll 22 is set in each side of tire.When applying power on driven roller 21, two rollers 21 are along identical direction rotation, and therefore, the direction that the wheel tyre bead is opposite is rotated.
Then, the polishing disk 20 centre bore 2H that passes tire is inserted in the tire hollow bulb.
The rotating tire's 1 by opening driven roller 21, and polishing disk 20 moves down lentamente.At this moment, keep polishing disk to rotate freely by the CD-ROM drive motor 20M that closes polishing disk 20.Therefore, when the outer surface of polishing disk 20 contacted with the inner surface of the fetus face of rotating tire's, polishing disk 20 began rotation.
By using sensor 20D to detect the rotation of polishing disk 20, when during polishing disk 20 moves down, detecting the startup of rotation, open the CD-ROM drive motor 20M of polishing disk 20, and, stop to move down in position that polishing disk 20 begins to rotate from it or after highly having moved down a predetermined distance.Thereby polishing disk is with the direction rotation opposite with the direction of rotation of tire, and tire is polished.
For polishing equably, suitably as polishing disk 20, wherein the bristle 20B of metal or synthetic resin radially is fixed among the cylindrical core 20C with polish brush.Preferably, adopt the bristle of making by the synthetic resin of the abrasive particle that comprises aluminium oxide or carborundum.Under the situation of polish brush, be not easy to stop up, the bristle profile inner surface along fetus face easily is crooked and mobile.Thereby, the surface can be polished equably a little thickness.
The reason of CD-ROM drive motor 20M of opening polishing disk 20 after polishing disk 20 begins to follow the rotating tire's rotation is as follows: the position of the inner surface of the fetus face of tire or the interior diameter of fetus face is compared with the polished surface layer thickness that falls has relatively large variation.Furthermore, because the wearing and tearing and the distortion of bristle, the outside diameter of polishing disk 20 also in use also changes.Therefore, importantly: change tire at every turn, accurately polish the reference position that superficial layer contacts with the inner surface of fetus face with the outer surface of determining polishing disk 20.And from then on the distance that moves down of polishing disk 20 begins at the place, reference position.
In this example, the width W 2 of polishing disk 20 equals the width W 1 of polishing area Y, to eliminate the necessity that moves polishing disk 20 during polishing along the tire axial direction.Certainly, by moving polishing disk 20, can adopt the width ratio polishing disk 20 that polishing area Y is narrow along the tire axial direction.
After tire had been done the rotation of predetermined quantity, polishing disk 20 moved up and breaks away from the inner surface from tire, and closes CD-ROM drive motor.Also stop driven roller 21.Polishing disk 20 is removed from the tire hollow bulb.
Thus, the inner surface that produces at fetus face is provided with the tire of polishing area Y.
Then, select to satisfy at least one tacky on two sides band 5 in above-mentioned condition (1)-(6).By adopting tacky on two sides band 5 that noise silencer is fixed on the polishing area Y.
At first, tacky on two sides band 5 is applied on noise silencer or the sponge material bar, removes barrier paper by opposite side then, noise silencer is applied to polishing area Y from adhesive tape.
Thus, made the tire that has noise silencer.
*Compare test
Having prepared passenger vehicle uses and is of a size of 215/45R17 (radial of rim size 17 * 7JJ) is tested the durability of this tire and the adhesiveness of air-tightness and noise silencer.
When vulcanized tyre, the aqueous solution that contains silicone or mica powder is used as releasing agent, and this releasing agent remains in the inner surface of tire.Therefore, as shown in table 1, the inner liner surface of polishing in fetus face.Adopt the tacky on two sides band that noise silencer is fixed on the burnishing surface.
Adopting diameter is that the polish brush of 300mm is as polishing disk.The bristle diameter of polish brush is 0.9mm, and (TORAYGRIT, by TORAY MONFILAMENTCO., LTD makes: nylon grit size 240) is made by containing the carbonization silica sand.
Employing proportion is 0.039 ether polyurethane sponge bar (INOAC CORPORATION, production number: ESH2) as noise silencer.Noise silencer has rectangular cross-sectional shape, and it is of a size of height 20mm, width 97mm.
Employing has nonwoven base band and acrylic pressure sensitive adhesives, and (thermally-stabilised band #700) is as the tacky on two sides band for Ebisu Chemical Co., Ltd..
1) durability and adhesiveness test
Employing Tire testing drum, the tire that is installed on the standard rim travels 12 with the speed of 80km/h, 000km under the following conditions:
The interior 230kPa that presses
Loading of tire 6.2kN (the loading of tire restriction of JATMA regulation 230kPa 120%)
After travelling, check the damage of inner liner, check visually whether noise silencer fully adheres to.The result is as shown in table 1, wherein OK represent no problem,
*1 expression inner liner breaks, so the exposure of carcass cord,
*2 are illustrated on the surface of inner liner and cause little breaking,
*3 expression adhesive tapes do not stick on the inner surface,
*4 expression adhesive tapes adhere on the inner surface at first, but separate in the back of travelling.
2) air tightness test
The tire that is installed on the standard rim and is inflated to 230kPa was put into the hot cell 15 days under 80 ℃, measure residual compression then.The result is as shown in table 1, and wherein the index based on the control tire is 100, and wherein exponential quantity is big more, and air-tightness is good more.
Table 1
| Tire | Control | With reference to 1 | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 | Example 8 | Example 9 |
| Inner liner butyl rubber content, (percentage by weight) original depth t, (mm) polish the surface layer thickness h of falling, (mm) h/t, (%) width W 1 of polishing area Y, (mm) | 60 1.25 0 0 -- | 60 1.28 0.52 40 110 | 60 1.25 0.11 9 110 | 60 1.22 0.25 20 110 | 60 1.23 0.36 29 110 | 60 1.2 0.04 3 110 | 60 1.23 0.01 0.8 110 | 60 1.16 0.13 11 178 | 60 1.3 0.12 9 190 | 70 1.32 0.25 19 110 | 80 1.35 0.26 19 110 |
| Belt width W B (mm) | 178 | 178 | 178 | 178 | 178 | 178 | 178 | 178 | 178 | 178 | 178 |
| Noise silencer width W 0 (mm) | 97 | 97 | 97 | 97 | 97 | 97 | 97 | 97 | 97 | 97 | 97 |
| Test result durability adhesiveness air-tightness | OK *3 100 | *1 OK 70 | OK OK 98 | OK OK 95 | OK OK 92 | OK OK 99 | OK *4 100 | OK OK -- | *2 OK -- | OK OK 102 | OK OK 106 |
Claims (18)
1. a manufacturing has the airtyred method of noise silencer, may further comprise the steps:
The preparation vulcanized tyre,
The inner surface of the fetus face of the tire that polished surface is limited by vulcanized rubber and
Adopt the tacky on two sides band that noise silencer is fixed on the inner surface that has polished, wherein
Described noise silencer is that 0.005 to 0.060 sponge material is made by proportion, and
When measuring according to T shape discrete testing under 25 ℃, the adhesion scope of described tacky on two sides band is for being not less than 1.8 newton/20mm bandwidth.
2. the method for claim 1, wherein
The thickness of described tacky on two sides band is 0.38mm to the maximum.
3. the method for claim 1, wherein
The hot strength of described tacky on two sides band is at least 10 newton/10mm width.
4. the method for claim 1, wherein
Described tacky on two sides band has two-layer different pressure-sensitive adhesive.
5. the method for claim 1, wherein
Employed tacky on two sides band is the tacky on two sides band with following cold-resistant characteristic, promptly, when described adhesive tape carried out 90 degree slip crooked tests under-35 ℃, described adhesive tape satisfied following condition: described adhesive tape is not destroyed and do not separate with rubber for tire from described noise silencer.
6. the method for claim 1, wherein
Employed tacky on two sides band is the tacky on two sides band with following heat-resistant quality, promptly, when described adhesive tape carries out T shape discrete testing under 120 ℃, described adhesive tape satisfies following condition: described adhesive tape is not destroyed and do not separate with rubber for tire from described noise silencer, and causes cohesional failure thus in described noise silencer.
7. the method for claim 1, wherein
Employed tacky on two sides band is the tacky on two sides band with following water-proofing performance, promptly, when described adhesive tape carries out the wet discrete testing of T shape, described adhesive tape satisfies following condition: described adhesive tape is not destroyed and do not separate with rubber for tire from described noise silencer, and causes cohesional failure thus in described noise silencer.
8. the method for claim 1, wherein
The width that polishing covered of described inner surface is greater than the width of described noise silencer, less than the belt width in the fetus face that is arranged on described tire.
9. the method for claim 1, wherein
Described fetus face comprises that inner liner is used as the innermost layer of airtight rubber compound, and
In the step of the inner surface of described polishing fetus face, the THICKNESS CONTROL on the surface that the polishing of described inner liner is fallen be no more than described inner liner thickness 30%.
10. method as claimed in claim 9, wherein
In the step of the inner surface of described polishing fetus face, the THICKNESS CONTROL on the surface that the polishing of described inner liner is fallen be not less than described inner liner thickness 3%.
11. method as claimed in claim 10, wherein
The thickness range on the surface that described polishing is fallen be described inner liner thickness 5% to 10%.
12. method as claimed in claim 9, wherein
Described inner liner comprises the butyl rubber of at least 70 parts of weight with respect to the rubber components of 100 parts of weight.
13. a pneumatic tire comprises
Have inner surface and the fetus face that defines the outer surface of tread surface,
Pair of sidewall portion,
Pair of bead portion and
Noise silencer, wherein
Described inner surface is provided with a polishing area,
Described noise silencer is that 0.005 to 0.060 sponge material is made by proportion, and is fixed to described polishing area with the tacky on two sides band, and
When measuring according to T shape discrete testing under 25 ℃, the adhesion scope of described tacky on two sides band is for being not less than 1.8 newton/20mm bandwidth.
14. pneumatic tire as claimed in claim 13, wherein
The thickness of described tacky on two sides band is 0.38 millimeter to the maximum.
15. pneumatic tire as claimed in claim 13, wherein
Described fetus face comprises the inner liner of the airtight rubber compound that limits described inner surface, and
The thickness of the superficial layer that the polishing of described inner liner is fallen (h) be not less than described inner liner thickness (t) 3%, but be not more than described inner liner thickness (t) 30%, wherein
The thickness of described inner liner (t) is given as the thickness (t1) of the described inner liner of locating to measure near the position (Q) the edge of described polishing area (Y) (Ye), and
Difference (t1-t2) between the thickness (t2) of the described inner liner that has polished that described thickness (h) is located to measure by described thickness (t1) with near the position (Pe) the edge of described polishing area (Y) (Ye) is given.
16. a pneumatic tire comprises
A kind of pneumatic tire comprises
Fetus face with outer surface of inner surface and qualification tread surface,
Pair of sidewall portion and
Pair of bead portion, wherein
Described fetus face comprises the inner liner of the airtight rubber compound that limits described inner surface,
Described inner surface is provided with polishing area, the thickness on the surface that the polishing of wherein said inner liner is fallen (h) be not less than described inner liner thickness (t) 3%, but be not more than described inner liner thickness (t) 30%.
17. the method on the inner surface that noise silencer is fixed to airtyred fetus face comprises the steps:
Polish described fetus face described inner surface and
With the tacky on two sides band described noise silencer is fixed to described polished inner surface, wherein
Described fetus face comprises the inner liner of the airtight rubber compound that limits described inner surface, and
In the step of the inner surface of described polishing fetus face, the THICKNESS CONTROL of the superficial layer that the polishing of described inner liner is fallen be no more than described inner liner thickness 30%.
18. method as claimed in claim 17, wherein
In the step of the inner surface of described polishing fetus face, the THICKNESS CONTROL on the surface that the polishing of described inner liner is fallen be not less than described inner liner thickness 3%.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005308882A JP2007112395A (en) | 2005-10-24 | 2005-10-24 | Assembly of pneumatic tire and rim |
| JP2005308882 | 2005-10-24 | ||
| JP2005-308882 | 2005-10-24 | ||
| JP2005352437 | 2005-12-06 | ||
| JP2005352437A JP4410753B2 (en) | 2005-12-06 | 2005-12-06 | Tread inner surface finishing method |
| JP2005-352437 | 2005-12-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1954996A true CN1954996A (en) | 2007-05-02 |
| CN1954996B CN1954996B (en) | 2010-12-15 |
Family
ID=38062640
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101506783A Active CN1954996B (en) | 2005-10-24 | 2006-10-23 | Method for manufacturing low noise pneumatic tire |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2007112395A (en) |
| CN (1) | CN1954996B (en) |
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| CN1954996B (en) | 2010-12-15 |
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