CN101549618A - Sound control unit for tire - Google Patents
Sound control unit for tire Download PDFInfo
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- CN101549618A CN101549618A CNA2009101373624A CN200910137362A CN101549618A CN 101549618 A CN101549618 A CN 101549618A CN A2009101373624 A CNA2009101373624 A CN A2009101373624A CN 200910137362 A CN200910137362 A CN 200910137362A CN 101549618 A CN101549618 A CN 101549618A
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- tire
- noise silencer
- weight
- polyalcohol
- cavernous body
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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
A sound control unit for tires is provided. The sound control unit is made from cavernous bodies, having a tire inner surface or a bottom surface of a wheel felloe inner surface fixed around the tire and a top surface faced to the tire inner space extending along the tire direction in the tire inner space. The cavernous bodies are composed of hydrophobic polyurethane cavernous bodies; the hydrophobic polyurethane cavernous bodies are obtained by solidifying mixture of polyisocyanates, polyol, water-repellent agents and a foaming agent. The polyol is a mixture of a polyester polyol and a polyether multipolymer; the polyol comprises the polyester polyol accounting for 3%-6% weight and the polyester multipolymer accounting for 97%-40% weight; in addition, as for the polyol with 100 parts of weight, the quantity of the water-repellent agents in the mixture is in a range of 25 parts to 80 parts.
Description
The application be that November 18, application number in 2005 are 200510123650.6 the applying date, denomination of invention divides an application for the application of " assembly of air-inflation tyre and wheel rim and use therein noise silencer ".
Technical field
The present invention relates to a kind of sound control unit for tire, more specifically, relate to a kind of sound control unit for tire of being made by cavernous body, wherein, described cavernous body is made of the polyurethane sponge body of hydrophobic nature.
Background technology
One of known tire noise is the road noise that is created in about frequency limit of 50 to about 400Hz, and the resonance vibration (cavity resonance) that results from the air in the inside tires space is a major cause.In order to reduce this road noise, the applicant has proposed a kind of tyre assembly (c), and it has: the banded noise silencer of being made by cavernous body and extend along circumferential direction in the inner space of tire (a) (b) (for example in Figure 22 time go out); And wheel rim (for example referring to JP-A No.2003-252003).This noise silencer (b) is converted into heat energy with the energy of vibration of the air in inside tires space (a), can be able to effective inhibition to make the cavity resonance in the inside tires space (a) thus.
Under the situation that air-inflation tyre (d) is removed by wheel rim (e), the air in inside tires space (a) is at first discharged, and then, will depress the besd sed of rim portion (e2) that enters wheel rim as the bead part (d1) of the part of tire (d).Next, tire lever (f) inserts in the slit between the wheel rim (e1) of bead part (d1) and wheel rim (e), and makes the outward flange inclination tire lever (f) of the wheel rim (e1) into balance pivot, with thus from wheel rim (e1) taking-up bead part (d1).
But existing noise silencer (b) has relatively large thickness and its cross sectional shape is a rectangle or trapezoidal.That is, each side surface of noise silencer (b) all is the abrupt slope that upwards raises.Caused the end of tire lever (f) inconvenience of (shown in the dotted line among Figure 22) that can contact with noise silencer (b) thus, thereby damaged noise silencer (b) or noise silencer (b) is separated from tire (d).
On the other hand, because the noise silencer of being made by cavernous body (b) has high water absorbability, so produced at tire storage or tire and wheel rim between erecting stage the disadvantage that cavernous body may be got wet by rainwater etc.If tire and wheel rim assemble under the state that has absorbed water, then can produce the water that is absorbed influences weight balancing nocuously and causes tire vibration, or water penetrates into rubber for tire and causes the problem of internal damage.Thus, under the situation that tyre and rim assembles, need dewater fully, dry immediately but the cavernous body of having got wet is difficult to, this makes its operation bother very much.
Summary of the invention
First purpose of the present invention is to provide the assembly of a kind of air-inflation tyre and wheel rim, and it can reduce the chance that tire lever contacts with noise silencer when tire is dismantled by wheel rim, and prevents that when changing of tire etc. noise silencer from damaging.
Second purpose of the present invention is to provide a kind of method that forms noise silencer, but its actv. forms the noise silencer that uses in the assembly of air-inflation tyre and wheel rim.
The 3rd purpose of the present invention is to provide a kind of noise silencer, it can show good hydrophobic nature, even under the situation of water, can not absorb moisture in the noise silencer long term exposure yet, can the rapid draing noise silencer by wiping water etc., improved operability and prevented the variety of issue that moisture absorption causes such as tire vibration and inside tires damage etc.
The assembly of a kind of air-inflation tyre of the present invention and wheel rim comprises:
Wheel rim;
Be mounted to the air-inflation tyre of described wheel rim; And
The banded noise silencer of making by cavernous body, the volume of this cavernous body is in 0.4% to 20% scope by the overall volume in described wheel rim and air-inflation tyre osed top inside tires space, it has and is fixed to around the tire inner surface in described inside tires space or the basal surface on the wheel rim inside face and in the face of the top surface in described inside tires space, and described noise silencer circumferential direction along tire in the inside tires space is extended
Wherein, in comprising the tire radial cross section of tire axle,
Described noise silencer is the flat cross sectional shape of growing crosswise, and value is in 5 to 45mm scope from described basal surface to maximum ga(u)ge (tm) of described top surface for it, and the width of described basal surface (W1) is greater than described maximum ga(u)ge value (tm),
Described top surface repeats the wavy curve extension of gained on Width along a wavy unit, this wavy curve comprises: the mountain top portion with described maximum ga(u)ge value (tm); Be positioned at described mountain top portion both sides, have the valley portions of minimum thickness value (ti); And extend downward the ramp of described each valley portions from described mountain top portion, and
Each end on the Width of described top surface ends at described valley portions, and the thickness (te) from described top surface to described basal surface is in 1.0 to 15.0mm scope, in described mountain top portion, described valley portions and the described ramp each is extended continuously along the circumferential direction of tire, described cavernous body is foamed rubber or the synthetic resin foaming body with continuous air bubbles, the amplitude H of the wavy curve of described top surface is greater than 8mm, and the width W i of described basal surface is 20 to 70% of tread width TW.
By adopting this structure, when tire is removed by wheel rim, can reduce the touch opportunity of tire lever and noise silencer, prevent the damage of noise silencer when operations such as changing of tire thus.
At wavy curve is under the sinuous situation, and a kind of method that forms noise silencer of the present invention comprises:
Transmitting step, this step feeding tabular cavernous body, this cavernous body has first and second surface that is essentially parallel to each other on the length direction perpendicular to thickness direction;
Deforming step, this step is deformed into sinusoidal wave shape profile with the cavernous body of institute's feeding by alternately each surface in first and second surface of described cavernous body being pushed towards another surface in perpendicular to the cross section of length direction;
Cutting step, this step is cut the cavernous body that is deformed into the sinusoidal wave shape profile between described first and second surface by the truncation face that extends continuously on broad ways, and obtain two and half cavernous body parts, and each half cavernous body part all has the sinusoidal wave shape profile under the situation that squeeze pressure is removed and counter-rotating each other on profile; And
Segmentation procedure, this step is by being partitioned into a plurality of noise silencers at less mountain valley portion place's described half cavernous body of cutting of thickness with this half cavernous body along its length.
At wavy curve is under the trapezoidal wavy situation, and a kind of method that forms noise silencer of the present invention comprises:
Cutting step, this step is cut between first and second surface, is had first and second the surperficial tabular cavernous body that is essentially parallel to each other by the combination of the cut surface that is trapezoidal wavy profile along broad ways and extends continuously, and obtain two and half cavernous body parts, each half cavernous body part all has described trapezoidal wavy profile, and
Segmentation procedure, this step is divided into described a plurality of noise silencer by cutting the less mountain valley portion of half cavernous body thickness along its length with described half cavernous body.
By adopting said method, can actv. form the noise silencer of wavy curve and have the noise silencer of trapezoidal contoured wavy curve with sinusoidal wave shape profile.
Noise silencer of the present invention is become by hydrophobic polyurethane sponge system, and this hydrophobic polyurethane sponge body comprises that by foamed solidification the compound of polyisocyanates, polyalcohol, hydrophober and foaming agent obtains, wherein
Described polyalcohol is the compound of polyester polyol (polyester polyol) and polyester-type copolyether polyalcohol (polyester polyether copolymer polyol),
Described polyalcohol comprises: 97 to 40% the polyester-type copolyether polyalcohol that 3 to 60% polyester polyol that weight accounts for and weight account for, and
The amount of the hydrophober that the polyalcohol of 100 parts of weight is mixed into is in the scope of 25 to 80 parts of weight.
By adopting this composition, noise silencer of the present invention can show good hydrophobic nature, even also can not absorb moisture in the noise silencer long term exposure under the situation of water, so that can the rapid draing noise silencer by wiping water.
Here, the volume of noise silencer is by the determined apparent volume of the profile of noise silencer, comprises the shared volume of noise silencer in-to-in bubble.Term " overall volume in inside tires space " is defined as providing the value V that presses in conventional and do not have to be similar to by following equation (1) under the situation of load acquisition in assembly.
V＝A×{(Di-Dr)/2+Dr}×π (1)
In equation (1), " A " refers to the inside tires spatial area that obtains by tire inner space under the conventional state of CT scan, " Di " refers to the maximum outside diameter of tire inner space under conventional state as shown in Figure 1, and " Dr " finger wheel rim diameter and " π " refer to circular constant." press in conventional " to refer to be the definite air pressure of each tire in standard system, this standard system comprises the standard of tire institute basis: be maximum gas pressure under the situation of JATMA; It under the situation of TRA the maxim that is shown in the table " the tyre load limit under each cold inflation pressure (TIRE LOAD LIMITS AT VARIOUS COLDINFLATION PRESSURES) "; And under the situation of ETRTO " inflation pressure (INFLATION PRESSURE) ".Under the situation of the tire that is used for automobile, consider actual frequency of utilization, conventional interior pressure is 200kPa without exception.
Description of drawings
Fig. 1 is the section drawing that the assembly of air-inflation tyre of the present invention and wheel rim is shown;
Fig. 2 is the diagrammatic sketch of being got along the line I-I among Fig. 1;
Fig. 3 illustrates the formation of tire and the amplification sectional view of noise silencer;
Fig. 4 (A) to 4 (C) be the block diagram that other embodiment of noise silencer are shown with shorthand way;
Fig. 5 shows the chart of the relation between the reduction of noise silencer volume and road noise;
Fig. 6 is the amplification diagrammatic sketch of the noise silencer of first embodiment;
Fig. 7 is the noise silencer of explanation first embodiment and the partial section of the relation of the position between the tire lever;
Fig. 8 is the section drawing of another embodiment that the noise silencer of first embodiment is shown;
Fig. 9 (A) is the block diagram of the method for the explanation ribbon-shaped members that is used to make first embodiment to 9 (D);
Figure 10 (A) is the section drawing of explanation deforming step and cutting step, and Figure 10 (B) is the section drawing of cutting step cavernous body afterwards;
Figure 11 is the amplification diagrammatic sketch of the noise silencer of second embodiment;
Figure 12 is the noise silencer of explanation second embodiment and the partial section of the relation of the position between the tire lever;
Figure 13 is the section drawing of another embodiment that the noise silencer of second embodiment is shown;
Figure 14 is the section drawing of another embodiment that the noise silencer of second embodiment is shown;
Figure 15 is the section drawing of an embodiment again that the noise silencer of second embodiment is shown;
Figure 16 (A) is the block diagram of the method for the explanation ribbon-shaped members that is used to make second embodiment to 16 (D);
Figure 17 (A) to 17 (D) be the section drawing of employed noise silencer in the test of embodiment A;
Figure 18 (A) is the block diagram of the method for the explanation ribbon-shaped members that is used for being manufactured on the employed Comparative Example A An 2 of test of embodiment A and B and B2 to 18 (D);
Figure 19 (A) is the block diagram of the method for the explanation ribbon-shaped members that is used for being manufactured on the employed Comparative Example A An 3 of test of embodiment A and B and B3 to 19 (D);
Figure 20 (A) to 20 (F) be the section drawing of employed noise silencer in the test of Embodiment B;
Figure 21 is the block diagram of explanation hydrophobic nature test; And
Figure 22 is that explanation uses tire lever with the section drawing of tire by the operation of wheel rim dismounting.
The specific embodiment
Below will describe embodiments of the present invention based on accompanying drawing.
As shown in Figure 1, the assembly 1 of the air-inflation tyre of present embodiment and wheel rim comprises: wheel rim 2; Be installed on the tire 3 of wheel rim 2; And be arranged in noise silencer 4 in the inside tires space (i) that is impaled by wheel rim 2 and tire 3.
As shown in Figure 3, tire 3 is tubeless tiress, and it has: fetus face 3t; The 3s of sidewall portion that a pair of two ends from fetus face extend internally along the radial direction of tire 3; Be positioned at the bead part 3b at the place, the inner of the 3s of each sidewall portion; Wherein the inside face 3i of tire 3 is covered by the liner made from the rubber with low-permeable.By adopting this structure, air tight inside tires space (i) forms by tire inner surface 3i and wheel rim inside face 2i.Tire 3 can be any tire and to inner structure and kind without limits.But preferred what adopt is the tire that is used for automobile, wherein requires in the passenger compartment very quietly, and especially preferred is to have 50% or the automobile radial-ply tyre of littler height to width ratio.
For example, carcass 6 is formed by the organic fiber cord of one or more relative tire circumferential direction precedents as the layout of the angle in 70 to the 90 degree scopes: be a casingply 6A in the present embodiment.All turn back around bead core 8 in the two ends of casingply 6A.Bracing ply 7 is made of a plurality of band carcass pliess, and for example this band carcass plies is formed by the steel cord that relative tire circumferential direction becomes 10 to 40 degree angles to arrange: be two band carcass plies 7A and 7B in the present embodiment.By intersect the steel cord between carcass plies, bracing ply 7 can have higher band rigidity.It is to be noted, when needing, can arrange existing belt or analogue in the outside of bracing ply 7.
On the surface of sponge and under the help of the porous part in the inside, such noise silencer has suppressed the cavity resonance in the inside tires space (i) and has reduced road noise.Because sponge is easily deformable, promptly shrink or bending, at driving period squeegee action there is not substantial influence.Thus, can avoid exercising the deterioration of stability.
For example, the sponge that can preferably adopt comprises: such as the synthetic resin sponge of ether polyurethane, ester group polyurethane sponge and polystyrene sponge; And such as the cellular rubber of chloroprene rubber sponge (CR sponge), EP rubbers sponge (EDPM sponge) and government rubber sponge (NBR sponge).Among these, from the angle of quiet, in light weight, foaming adjustable, durability etc., preferably polyurethane sponge.
If proportion is excessive, cavernous body is easy to cause the weight of tire to increase, and proportion is too small, and the effect that suppresses cavity resonance can reduce.In view of the above, the proportion lower limit of cavernous body is 0.005 or higher, and is preferably 0.01 or higher.The upper limit of its proportion is 0.06 or lower, more preferably 0.04 or lower, more preferably 0.03 or lower.
The volume of noise silencer 4 (Vs) must be in 0.4% to 20% scope of the overall volume that accounts for inside tires space (V).Figure 5 illustrates noise silencer 4 and be arranged on experimental result when measuring load noise under the situation in the inside tires space (i).Ordinate is used to represent that the reduction of road noise and abscissa represent volume ratio (Vs/V).The reduction amount (dB) of the road noise that is reduced to the assembly under the situation that does not have noise silencer 4 in inside tires space (i) of road noise.
As can be seen from Figure 5, by the volume that guarantees noise silencer 4 be inside tires space (i) overall volume 0.4% or more, can expect the reduction effect that obtains about 2dB or higher road noise.This kind noise reduces degree and can obviously feel out in automotive compartment.In view of this, the lower limit of the volume of noise silencer 4 (Vs) preferably inside tires space (i) overall volume (V) 1% or bigger, more preferably 2% or bigger, more preferably 4% or bigger.On the other hand, if the volume of noise silencer 4 (Vs) surpass inside tires space (i) overall volume (V) 20%, then not only to the inhibition deleterious of road noise, and the cost increase in other words the weight balancing of assembly 1 be easy to deterioration.In view of this, the upper limit of the volume of noise silencer 4 (Vs) be preferably inside tires space (i) overall volume (V) 16% or littler, more preferably 10% or littler.It is to be noted that experimental result is to obtain, and under the situation of using two row's noise silencers 4, has confirmed also can reach approximate effect as long as cumulative volume (Vs) is in the described number range under the situation of using a noise silencer 4.
Here, because cavernous body has high hygroscopic character, tire storage or tire and wheel rim between erecting stage cavernous body drink up the rain or the like, this causes producing following problem, promptly, weight balancing is had a negative impact and causes tire vibration, make that the durability of cavernous body is lower, and penetrate into the internal damage that rubber for tire causes tire because of the water that is absorbed.
What use as cavernous body in the present embodiment, is to comprise the hydrophobic polyurethane that the compound of polyisocyanates, polyalcohol, hydrophobe and foaming agent obtains by foamed solidification.In the case, polyalcohol is the compound of polyester polyol and polyester-type polyethers copoly type polyalcohol.By adopting this kind structure, fully guarantee necessary intensity and road noise reduce effect in, noise silencer 4 can have good hydrophobicity performance, can prevent the variety of issue such as tire vibration and inside tires damage etc. that is caused by moisture absorption thus.
As is known, the polyurethane sponge body forms by foaming in polyisocyanates and polyalcohol react to each other with the process that forms the amino-formate bond in the cross-linked polyurethane with foaming agent.
In this process of present embodiment, water is used as foaming agent.Polyisocyanates in water and this compound reacts and produces carbon dioxide so that cross-linked polyurethane bubbles.Usually as foaming agent be when amino-formate bond forms, to have a lower boiling cmpd by what reaction heat was vaporized, such as methylene chloride or pentane etc.This kind foaming agent causes fast foaming, and be difficult to foaming is controlled, this has not only caused the hydrophobicity performance of the irregularity of disperseing such as foaming agent etc. unbalanced, but also makes and be difficult to obtain the foam homogeneity of special quality aspect bubble diameter and bubble density.Thus, the water that only uses foaming to be easy to control in the present embodiment.
With respect to the polyalcohol of 100 parts of weight, the combined amount of water is preferably in the scope of 2.5 to 6.0 parts of weight.If water is less than 2.5 parts of weight, it is insufficient then can to cause foaming, and the proportion of cavernous body is difficult in the described scope and is provided with lowlyer.On the contrary, if water surpasses 6.0 parts of weight, then cavernous body can too bubble, and makes cavernous body that the trend of loss hardness or tear strength be arranged.Be pointed out that in order to obtain enough durabilitys, cavernous body preferably has 30N or higher hardness and 10N/cm or higher tear strength.Even hardness surpasses 150N, the elasticity reduction causes lower durability.Surpass 10N/cm if tear strength increases, it causes the surplus of quality aspect, and this has produced the disadvantage that cost increases and production capacity descends.Be pointed out that the hardness of cavernous body is according to the measured value of method A (the 6.3rd part) of the several different methods that is used for hardness in the 6th part that is used for JIS K6400 " test method of flexible polyurethane foams (Testing Method for SoftUrethane Foam) " regulation.Tear strength be according to be used for the 11st part be used for tear strength method of inspection detected is value on the test block of the 1st kind of shape.
The example of the polyisocyanates that can adopt comprises: comprise such as toluene-2,4-diisocyanate (TDI), diphenylmethane diisocyanate (MDI), poly MDI, naphthalene diisocyanate ester, the two isocyanic acids aromatic polyisocyanate to phenyl ester, xylene diisocyanate (XDI), tetramethylxylene diisocyanate and dimethyl diphenyl diisocyanate etc.; And such as hexamethylene diisocyanate, hydrogenation MDI, IPDI, LDI, hydrogenation XDI, cyclohexyl diisocyanate with and the aliphatic polyisocyante of variant cmpd etc.
Polyalcohol in the present embodiment is the compound of polyester polyol and polyester-type copolyether polyalcohol.This is that noise silencer not only can fully ensure the necessary intensity as noise silencer 4, can also improve anti-hydrolysis power because by comprising polyester-type copolyether polyalcohol.And also because by comprising polyester polyol, noise silencer not only can improve the dispersiveness of hydrophober, also can be easy to the viscosity of mixing composition is adjusted can obtain the foam of low viscosity (low-gravity).
If the ratio of polyester polyol is low excessively, then the compatibility between hydrophobic nature and the polyester-type copolyether polyalcohol can deterioration, causes stirring insufficient thus, and this makes can not obtain the homodisperse foam of required hydrophober.Relative therewith, if the ratio of polyester polyol is too high, then do not have the ether chain combination in crosslinked polyurethane; Thus, foam tends to intensity reduction and loss hydrolytic resistance energy.Therefore, preferably, the part by weight of polyester polyol in 3 to 60% scope and the part by weight of polyester-type copolyether polyalcohol in 97 to 40% scope as balance.
In the case, with respect to the polyalcohol of 100 parts of weight, the combined amount of hydrophober is preferably in the scope of 25 to 80 parts of weight.If the combined amount of hydrophober is less than 25 parts of weight, then the hydrophober performance will become insufficient, and opposite, if the combined amount of hydrophober greater than 80 parts of weight, then is difficult to produce foam owing to hydrophober also plays plasticizer.
Be pointed out that, in order to realize well balanced between intensity, hydrolytic resistance, hydrophobicity performance, the formability, preferably in polyalcohol, as balance, the part by weight of polyester polyol is in 15 to 35% scope, and the part by weight of polyester-type copolyether polyalcohol is in 85 to 65% scope, and with respect to the polyalcohol of 100 parts of weight, the combined amount of hydrophober is in the scope of 30 to 50 parts of weight.
Here, the example of adducible polyester polyol comprises: by the low molecular polyalcohol of condensation, carboxylic acid and the cmpd that obtains such as the lactone group polyalcohol of caprolactone ring-opening polymerisation product and Beta-methyl-δ-Wu Neizhi ring-opening polymerisation product.The example of adducible low molecular polyalcohol comprises: ethylene glycol, diethylene-glycol, propylene glycol, 1,4-butylene glycols, 1,6-hexandiol, 2,5-hexandiol, 3-methyl isophthalic acid, 5-pentanediol, neopentyl glycol, glycerine, trimethylolpropane, trimethylolethane, pentaerythrite, diglyceride, Portugal's hexitol, sucrose or the like.The example of adducible carboxylic acid comprises: succinic acid, adipic acid, maleic acid, fumaric acid, phthalic acid, isophathalic acid, succinic anhydride, maleic anhydride, phthalic anhydride or the like.
Polyester-type copolyether polyalcohol can be known product.For example, can be that esterification (or ester exchange reaction) by aliphatics dicarboxyl acid (or its ester-formin derivant) and low molecular glycol is so that reactor product is subjected to the cmpd that polycondensation obtains.Perhaps, for example can be the cmpd that the ester exchange reaction by polyester polyol and polytetramethylene glycol obtains.In the present invention, use polyester-type copolyether polyalcohol, improve anti-decomposability and produce good hydrophobic nature to increase the intensity of foam.
Preferably use ester as above-mentioned hydrophober, the coupling compound that this ester has the monohydroxy alcohol of 14 to 36 carbon atoms and has the aliphatic dicarboxylic acid (or alicyclic dicarboxylic acid) of 14 to 36 carbon atoms.If the quantity of carbon atom is 14 or more, then the hydrophobic that had of long chain hydrocarbon groups group can be offered help to the hydrophobic nature of foam effectively.If the quantity of carbon atom is too much, then hydrophober is easy to become solid-state and makes it be difficult to operation under room temperature or lower temperature.Thus, the upper limit of the quantity of carbon atom preferably 36 or still less.
The example of this kind ester comprises:
(a) isooctadecane base stearate,
(b) oil base stearate,
(c) oleic acid octadecane ester,
(d) two oleic acid, two polyester,
(e) distearyl acid two polyester reach
(f) dibasic acid ester of compound of dimer acid and Polymer ethanol with 32 to 36 carbon.
Be pointed out that employed catalyst and foaming controlling agent can be mixed into existing similar method and mix composition in forming the polyurethane sponge body usually.
Not only the hydrophober polyurethane sponge body that obtains by the such blending constituent of foamed solidification can fully be guaranteed as the required mechanical strength of noise silencer 4, and can improve hydrolytic resistance and improve fastness to water.Be improved and realized better homogeneity because contain hydrophober and its dispersiveness,, can prevent the variety of issue that damages such as tire vibration and inside tires that causes in the cavernous body because of moisture absorption thus so can produce good hydrophobicity performance.And, can obtain to have the cavernous body of lower density (low-gravity) and keep above characteristic simultaneously, can obtain very high road noise thus and reduce effect.
As shown in Figure 3, noise silencer 4 has the basal surface 4A that is fixed to tire inner surface 3i or wheel rim inside face 2i; And at the top surface 4B towards the center of inside tires space (i) of the opposite side of the basal surface 4A of noise silencer 4.Basal surface 4A prevents that noise silencer 4 from moving freely in inside tires space (i) during travelling, to prevent that noise silencer 4 from damaging and to help to realize that sympathetic response suppresses effect.Be pointed out that basal surface 4A is the surface of smooth planar basically.
Here, when changing of tire, the situation of bead part 3b being pressed to suddenly wheel rim inside face 2i is arranged.Therefore, noise silencer 4 preferably is fixed to tire inner surface 3i, is more preferably to be fixed to tyre surface inside face 3ti.Be pointed out that tyre surface inside face 3ti refers to the surface that contacts with the road surface among the fetus face 3t.In specification sheets, the tyre surface inside face comprises the width regions TW that arranges along the tire axial direction, wherein comprises bracing ply 7 at least.As preferred embodiment, noise silencer 4 is fixed as makes the width of basal surface 4A be centered close to tire equator C.Noise silencer 4 more preferably has with respect to layout and cross sectional shape as the tire equator C bi-directional symmetrical at center.
As shown in Figure 6, preferably, in comprising the tire radial cross section of tire axle, the maximum ga(u)ge value (tm) of noise silencer 4 from basal surface 4A to top surface 4B is in 5 to 45mm scopes, and noise silencer 4 forms the maxim (tm) of the width W 1 of grow crosswise flat cross sectional shape and basal surface 4A greater than thickness.Maxim of thickness (tm) and width (W1) are mounted to tire 3 and tire at noise silencer 4 and do not have dibasic acid ester to have under the state of assembling wheel rim (under normal pressure and temperature) to measure.The maxim of thickness (tm) measures on perpendicular to the direction of basal surface 4A and width W 1 is measured along basal surface 4A.
The contriver has carried out tire and has removed test having the rectangular and assembly that be arranged on the noise silencer 4 on the tyre surface inside face 3ti in cross section.Damaged condition to noise silencer 4 is studied.As shown in figure 22, use tire changing device (not shown) and tire lever (f) to carry out tire by an above staff and remove test.The staff in advance and do not know to exist noise silencer.In the assembly of each embodiment, used multiple noise silencer and various tire with different aspect ratios with different maximum ga(u)ges (tm).
When tire 3 was removed by wheel rim 2, tire lever (f) inserted inside tires space (i), inserted the length difference according to tyre type (kind, height to width ratio etc.) or staff's technology and work habit.But, as test result, find that having maximum thickness (tm) at each is limited in the assembly of the noise silencer in 5 to the 45mm scopes, the quantity of the noise silencer of damage reduces.Consider the reason that the insertion length of tire lever (f) can be restricted for fear of the routine understanding of tire lever (f) contact tire inner surface 3i because of the staff; Therefore, under the situation of having used the noise silencer with less thickness, the chance that the insertion length of tire lever (f) was restricted and contacted noise silencer reduces.Particularly to each height to width ratio more be 50% or littler leakage the tire of gas demonstrate the tendency that tire lever (f) frequently contacts with the side surface of noise silencer.
Thus, carried out further experiment and obtained following result: can avoid by adopting following structure by the damage that tire lever (f) causes: as shown in Figure 6, in tire radial cross section,
(1) top surface 4B extends along wavy curve 14, the repetition that this wavy curve is wavy unit 13 on Width forms, it is by constituting with the lower part: the 10t of mountain top portion with the maxim (tm) on the thickness (t), be positioned at the valley portions 11b with the minimum value (ti) on the thickness (t) of the both sides of mountain top portion, and the 10t of portion extends downward the ramp 12 of each valley portions 11b from the hilltop
(2) each the end 4Be on the Width of top surface 4B ends at valley portions 11b or ramp 12, and
(3) be that each end 4Be on the Width of top surface 4B and the thickness (te) between the basal surface 4A are in 1.0 to 15.0mm the scope.
In other words, top surface 4B has than the mountain top portion 10 of heavy gauge (t) and the mountain valley portion 11 with less thickness (t) alternately to form thus along wavy curve 14 extensions.Not only each end of noise silencer 4 ends at mountain valley portion 11, and each end is restricted to value in 1.0 to the 15.0mm scopes apart from the thickness (te) of basal surface 4A.Be pointed out that, not only mountain top portion 10 be defined as and have the part that is higher than as the amplitude line of centers KL of the wavy curve 14 of benchmark, and mountain valley portion 11 is also limited by the part with the less thickness (t) that is lower than amplitude line of centers KL than heavy gauge (t).
In Fig. 1 to 10, show first embodiment of wavy curve 14 for the noise silencer 4 of sinuous situation.
In this way, not only each end of noise silencer 4 ends at mountain valley portion 11, and the thickness of each end (te) also is restricted to 15.0mm or littler.Thus, avoided contacting of tire lever and noise silencer 4 greatly.Noise silencer 4 has the ramp 12 that gradually changes to the 10t of mountain top portion from each end.As shown in Figure 7, adopt this ramp 12 to eliminate to be easy to the part 15 of interfering with lever (f).Thus, avoided contacting of tire lever (f) and noise silencer 4 to a greater degree.Ramp 12 is near the circular arc track of being described by the end of tire lever (f) (fL).Thus, even tire lever (f) contacts with noise silencer 4, the friction force between tire lever (f) and the ramp 12 also can be very little, thereby make the end of tire lever (f) be difficult to insert noise silencer 4.Because combine less friction force and insert difficulty, so but actv. prevent the disengaging of the badly damaged and noise silencer 4 of noise silencer 4 from tire 3.
Be pointed out that if each end portion thickness (te) surpasses 15.0mm, then each end of noise silencer 4 and tire lever (f) are easy to mutual interference.Thus, be conceived to prevent the damage to noise silencer 4, thickness (te) is 15.0mm or littler preferably, 10.0mm or littler more preferably, and 7.0mm or littler more preferably.If thickness (te) less than 1.0mm, then is difficult to reach the effect that increases production capacity, and thickness (te) is preferably 1.0mm or bigger thus, 3.0mm or bigger more preferably, and 4.0mm or bigger more preferably.To provide relevant detailed description after a while.
Be conceived to increase production capacity, minimum thickness value (ti) is preferably 1.0mm or bigger, 3.0mm or bigger more preferably, and 4.0mm or bigger more preferably.Particularly preferably be each end portion thickness (te) and equal minimum thickness value (ti), promptly from preventing that the damage of noise silencer 4 and the angle that increases its production capacity are considered that each end of noise silencer 4 ends at valley portions 11b.As long as adopted this thickness range, thickness (te) can be greater than minimum value (ti), and promptly each end of noise silencer 4 or one of them end can end at the point on the ramp 12, but not valley portions 11b.
For the wavy curve 14 of determining top surface 4B profile, if amplitude H is too small, then the face area of top surface 4B diminishes and the sympathetic response that is easy to thus lower in the inside tires space (i) suppresses effect, if and amplitude H is excessive, ramp steepening then, this can have a negative impact to the damage that prevents noise silencer 4.Be conceived to this, the lower limit of amplitude H is preferably 4mm or bigger, 8mm or bigger more preferably, and 10mm or bigger more preferably, and the higher limit of amplitude H is preferably 44mm or littler, 40mm or littler more preferably, and 35mm or littler more preferably.Be pointed out that, at wavy curve 14 is under the sinuous situation, the ratio H/Wp of amplitude H and waveform width W p (being the width of wavy unit 13) is preferably 0.3 or littler, and more preferably 0.25 or littler, so that ramp 12 is near the track (fL) of tire lever (f).
In Fig. 1,3,6 and 7, show the situation of following pattern, promptly on the top surface 4B of noise silencer 4, have a 10t of mountain top portion and specifically each end of noise silencer all end at the pattern of valley portions 11b, promptly top surface 4B is formed with the situation of a wavy unit 13.On top surface 4B, can adopt the 10t of two or more mountain top portions, and in Fig. 8, show pattern with the top surface 4B that comprises two wavy unit.
Quantity at the 10t of mountain top portion is under two or more situations, because the increase of the face area of top surface 4B suppresses effect so can produce better sympathetic response.Mountain valley portion 11 is formed between the mountain top portion 10.When tire lever (f) contacted with ramp 12, mountain valley portion 11 made mountain top portion 10 be easy to be out of shape on Width.Thus, noise silencer 4 insertion that can avoid tire lever (f) and tire lever (f) can be suppressed in small depth.Because played hot release usefulness, mountain valley portion 11 can help to prevent the cause thermal damage of noise silencer 4.
Be pointed out that, because the volume of noise silencer 4 (Vs) is limited in the described scope with respect to the overall volume (V) of inside tires space (i), so if the length of noise silencer 4 on circumferential direction is determined, then the sectional area of noise silencer 4 also is determined.Profile by determining wavy curve 14 and wait under the situation about limiting existing such as maximum ga(u)ge value (tm), the width W 1 of basal surface 4A is determined automatically.If the width W 1 of basal surface 4A is excessive, then will reduce the work efficiency that noise silencer is mounted to tire inner surface 3i.Be conceived to this, under tire 3 situation for the radial-ply tyre that is used for automobile, the width W 1 of basal surface 4A is preferred in 30 to 250mm scope and more preferably in 60 to 140mm scope.The width W i of basal surface 4A is also preferably in 5 to 100% the scope of tread width TW, and more preferably in 20 to 70% scope.
Can in every way noise silencer 4 be fixed to tire inner surface 3i or wheel rim inside face 2i.Be conceived to cost and operability, preferably adhere to, particularly preferably be by pressure-sensitive sense adhesion double spread band 23 and adhere to adhesives or pressure-sensitive adhesion double spread band 23.Also can adopt various NA modes, the method for for example using screw or metal tools being installed, method that in curing process, they is combined as a whole or the like.Then, noise silencer 4 is fixed to air-inflation tyre 3, it also can be used as the complete sale of fabricate block of air-inflation tyre 3 and noise silencer 4.Preferably tire inner surface 3i is finished to smooth to improve adhesiveness.Yet, preferably remove this prominent bar by when polishing, polishing because the common meeting of air discharge duct that is formed on the bladder that is used for sulfidization molding forms prominent bar on tire inner surface 3i.Perhaps, also can use the bladder that does not have air discharge duct in its surface and the tire inner surface that forms flat-satin thus.Preferably, the tire of sulfidization molding there is not coating release agent on tire inner surface 3i, so that adhere to tire inner surface 3i better.
To the noise silencer 4 of first embodiment that is used to form the wavy curve 14 with sinusoidal wave shape profile be described.
Forming method comprises: the transmitting step of feeding cavernous body (S) (Fig. 9 (A)); Cavernous body (S) bending of being transmitted is deformed into the deforming step (Figure 10 (A)) of sinusoidal wave shape profile; The cavernous body (S) of distortion is cut to the cutting step (Figure 10 (A) and 10 (B)) of two and half cavernous bodies (Sa and Sb) along horizontal cutting; And alongst cut apart half and half cavernous body (Sa and Sb) and obtain the segmentation procedure (Fig. 9 (C) and 9 (D)) of a plurality of noise silencers 4.
Shown in Fig. 9 (A), in transmitting step, the tabular cavernous body (S) with first surface parallel to each other substantially (P1) and second surface (P2) is along length direction (A) feeding perpendicular to thickness direction (T).Transmitting step can easily be realized by using the mode such as belt conveyor etc.Be pointed out that, thickness (T) equal maximum ga(u)ge value (tm) and minimum thickness value (ti) and (tm+ti).
Shown in Figure 10 (A), in deforming step, in perpendicular to the cross section on the Width of length direction (A), the cavernous body (S) of institute's feeding is by first surface (P1) and second surface (P2) alternately extruding mutually.Thus, cavernous body (S) is deformed into the sinuous profile corresponding to wavy curve 14.In this deforming step, what adopted is the axle 20 and 20 that remains on upper and lower two horizons parallel to each other.Each 20 is all constituted by the axial region 20a that is supported free to rotately and with a plurality of roll body 20b of the concentric installation of axial region 20a.Each roll body 20b arranges with equidistantly (L) on all identical and axial direction of the external diameter of discoid and each disk.Be pointed out that the outside face of roll body 20b the profile of being cut sth. askew for circular arc.
The roll body 20b of last axle 20 and the roll body 20b of lower shaft 20 are offset half length of spacing (L) each other in the axial direction.That is, roll body 20b is in the axial direction with the spacing arranged alternate of L/2 upside and the downside at cavernous body (S).Thus, when cavernous body (S) during by the gap between last axle 20 and the lower shaft 20, cavernous body (S) is alternately pushed so that cavernous body (S) is deformed into sinuous profile by upper and lower roll body 20b.
Shown in Figure 10 (A), in cutting step, the truncation face (CT) that the cavernous body (S) that is deformed into the sinusoidal wave shape profile is extended continuously along broad ways between first surface (P1) and second surface (P2) is cut to two and half cavernous bodies (Sa and Sb).Shown in Figure 10 (B), two and half cavernous bodies (Sa and Sb) unload from axle 20 and 20, and under the situation that squeeze pressure removes, cut surface (CT) is sinuous profile, the cut surface (CT) of first cavernous body (Sa) is the counter-rotating of the cut surface (CT) of second cavernous body (Sb), and first and second surface (P1 and P2) reverts to the plane.This manufacturing process is also referred to as consistency profiles.
In this way, in conjunction with deforming step and cutting step, two and half cavernous bodies (Sa and Sb) with identical sinusoidal wave shape profile can be from a cavernous body (S) by once cutting formation efficiently.Be pointed out that the interval AL between the axle 20 and 20 is arranged so that cut surface does not contact with last or following roll body 20b.In cutting step, it is preferred that what use is the cutting blade of machine cuts cavernous body at normal temperatures, for example shunt blade (split blade), but, be not preferred so use the thermal cutting of high temperature wires because the surface melting of cavernous body can tend to deterioration noise absorption effect.
Shown in Fig. 9 (C), in this embodiment, what carry out is adhering step with the pressure-sensitive adhesion double spread band of the first surface (P1) of surface adhesion to half cavernous body (Sa and Sb) of pressure-sensitive adhesion double spread band 23 and second surface (P2).In this step, a pressure-sensitive adhesion double spread band with big width is adhered to each surface (P1 and P2) and almost covers its whole surface.
Shown in Fig. 9 (C) and 9 (D), in segmentation procedure, with half cavernous body (Sa and Sb) (all being attached with pressure-sensitive adhesion double spread band 23 above each) at each corresponding to the position of the less mountain valley portion 11 of thickness (t), preferably A and pressure-sensitive adhesion double spread band 23 together cut along its length corresponding to the position of paddy lower curtate 11b at each.Thus, half cavernous body (Sa and Sb) is divided into a plurality of noise silencers 4.Be pointed out that, preferably with noise silencer 4 along its length the length of A under the state of cavernous body (S), just be adjusted into the size that is fit to tire in advance, also can after segmentation procedure, suitably adjust cutting step of its length or the like simultaneously to each noise silencer 4.Each noise silencer 4 also can suitably form in each end has tapered portion.
In this manufacturing process, a plurality of be substantially identical shaped noise silencer 4 can the method with preferable efficient manufacturing.Therefore, not only improved production capacity, and suppressed the generation of waste material and improved the earning rate of material thus.And, in order to obtain to have noise silencer 4 (Fig. 8), only need once every 11 cuttings of a mountain valley portion such as two mountain top portions 10.
Here, under the situation of minimum thickness (ti) less than 1.0mm, the possibility that has mountain valley portion 11 to break in the stage that obtains half cavernous body, owing to deteriorated workability in subsequent step, this can cause the reduction of production capacity.Therefore, minimum thickness value (ti) is preferably 1.0mm or bigger, 3.0mm or bigger more preferably, and 4.0mm or bigger more preferably.
In the present embodiment, cavernous body (S) is deformed into sinuous profile in deforming step, be cutting step then, for example can remain under the situation of flat original shape at cavernous body (S), blade moves to adopt alleged consistency profiles to cut cavernous body (S) thus along sinuous profile.To be similar to the operation in described embodiment, can form noise silencer 4 by cutting half cavernous body that is obtained.
Then, in Figure 11 to 15, show the situation of wavy curve 14 for second embodiment of the noise silencer 4 of trapezoidal profile.As shown in figure 11, in second embodiment, wavy curve 14 is the trapezoidal contoured curves that repeat wavy unit 13 on Width, and it comprises the 10t of mountain top portion that is made of the linear upper limb 30 that is parallel to basal surface 4A, the valley portions 11b that is made of the linear lower edge 31 that is parallel to basal surface 4A and the ramp 12 that is made of linear tilt edge 32.
Be pointed out that inclination edge 32 can be provided with arc sections, this arc sections has radius of curvature very little compared to the entire length of inclination edge 32 in the connecting portion office of upper limb 30 and/or lower edge 31.Here, refer to tilt compared to the very little radius of curvature of the entire length of inclination edge 32 edge 32 entire length 42% or littler, be preferably 35% or littler, and more preferably 20% or littler.
Equally, under the situation of the noise silencer 4 of second embodiment, not only each end of noise silencer 4 all ends in the mountain valley portion 11, and each end portion thickness (te) also is limited in 15.0mm or littler; Thus, avoided contacting of tire lever (f) and noise silencer 4 to a greater degree.Noise silencer 4 is constructed to comprise from each end to the mild ramp 12 of the 10t of mountain top portion.By adopting ramp 12, as shown in figure 12, the part 15 of interfering with tire lever (f) is removed easily, and this is feasible has avoided contacting of tire lever and noise silencer 4 to a greater degree.Because ramp 12 is near the circular-arc track of being described by the end of tire lever (f) (fL), even tire lever contacts with noise silencer 4, the friction force between tire lever (f) and the ramp 12 also can very little and terminal very difficult insertion noise silencer 4.Thus, because combine two kinds of effectiveness, thus be similar to the noise silencer 4 of first embodiment, but noise silencer 4 actvies of second embodiment prevent the generation from the disengaging of tire 3 of the badly damaged and noise silencer 4 of noise silencer 4.
In second embodiment, be formed on angle γ between ramp and the basal surface 4A and be preferably 70 degree or littler, 60 degree or littler more preferably, 50 degree or littler more preferably are so that the profile of ramp 12 more is similar to the track (fL) of tire lever.
In second embodiment,, can in the top surface 4B of noise silencer 4, adopt one or more mountain top 10t of portion (upper limb 30) in the mode similar to the situation of first embodiment.In Figure 11 and 13, the situation that includes a 10t of mountain top portion (upper limb 30) has been described.Particularly, in Figure 11, each end that shows noise silencer 4 ends at the pattern of valley portions 11b (lower edge 31), and promptly at both ends portion is provided with the thin projection 35 along lower edge 31.Be pointed out that in the noise silencer 4 of Figure 11, top surface 4B is formed with a wavy unit 13.In Figure 13, one of them end of noise silencer 4 ends at ramp 12 (inclination edge 32), but its each end all can end at ramp 12 (inclination edge 32).
In Figure 14 and 15, show the situation that comprises two 10t of mountain top portion (upper limb 30).Especially, in Figure 14, each end that shows noise silencer 4 ends at the situation of valley portions 11b (lower edge 31), and wherein noise silencer 4 has the top surface 4B that is formed with two wavy unit 13.In Figure 15, each end of noise silencer 4 all ends at the point (inclination edge 32) on the corresponding ramp 12, but also only one of them end end at point (inclination edge 32) on the ramp 12.
Then, will the method for optimizing that be used to form the noise silencer 4 with the wavy curve 14 that is trapezoidal profile be described.
This formation method comprises: the combination of the cut surface CT that extends along broad ways in trapezoidal profile is divided into tabular cavernous body (S) cutting step (Figure 16 (B)) of two and half cavernous bodies (Sa and Sb); And the segmentation procedure that half cavernous body (Sa and Sb) is divided into a plurality of noise silencers 4 by cutting half cavernous body (Sa and Sb) along its length.
With used similar in the formation method of the noise silencer 4 of first embodiment, tabular cavernous body (S) is to have the first surface (P1) parallel to each other substantially and the cavernous body (S) of second surface (P2).The thickness (T) of cavernous body (S) equal maximum ga(u)ge (tm) and minimum thickness (ti) and (tm+ti).
Shown in Figure 16 (B), in cutting step, cutter 18 between first surface (P1) and second surface (P2) on Width the profile along the trapezoidal wave shape move.Thus, cavernous body (S) is cut into two and half cavernous bodies (Sa and Sb) along the combination along the cut surface (CT) of trapezoidal wavy profile extension.Such manufacturing process is called as the profile forming process.The blade lengths of cutter 18 is longer than the length of cavernous body (S).Preferably, cutter 18 is cutting blades of machine cuts cavernous body at normal temperatures, for example shunts blade, but because deterioration noise absorption effect can be tended in the surface of cutter fusing cavernous body (S), so the cutter of use high temperature wires is not preferred.
By adopting this profile forming process, two and half cavernous bodies (Sa and Sb) with identical trapezoidal wavy cut surface (CT) combination can form in time processing efficiently.
Shown in Figure 16 (C), in this embodiment, what carry out is adhering step with the pressure-sensitive adhesion double spread band of the first surface (P1) of surface adhesion to half cavernous body (Sa and Sb) of pressure-sensitive adhesion double spread band 23 and second surface (P2).In this step, a pressure-sensitive adhesion double spread band with big width is adhered on the whole surface of each surface (P1 and P2).
Shown in Fig. 6 (C) and 6 (D), in segmentation procedure, with half cavernous body (Sa and Sb) (all being attached with pressure-sensitive adhesion double spread band 23 above each) corresponding to the position of the less mountain valley portion 11 of thickness (t), preferably in that A and pressure-sensitive adhesion double spread band 23 together cut along its length corresponding to the position of lower edge 31 (valley portions 11b).Thus, half cavernous body (Sa and Sb) is divided into a plurality of noise silencers 4.
Here, in order to obtain two and half cavernous bodies (Sa and Sb) of same profile by the profile forming process, necessary is: in the wavy unit 13 of the wavy curve 14 in trapezoidal wavy profile, the width of upper limb 30 (Wy) equals the width and (Wt+Wt) of the lower edge 31 of these upper limb 30 Width both sides substantially.
In order to cut out a plurality of noise silencers 4 by a cavernous body (S) most effectively, each end that is noise silencer 4 is provided with under the situation of thin projection 35, preferably its width (We) and greater than 0mm and be equal to or less than the width (Wy) of upper limb 30, and more preferably at the width (Wy) width (We) and that equal upper limb 30 substantially of the thin projection 35 at each place, end.Most preferably, the width (We) of the thin projection 35 at both ends place is equal to each other.This noise silencer 4 can obtain by half cavernous body (Sa and Sb) that cuts Figure 16 (C) in the midpoint of lower edge 31, makes that thus the earning rate of material aspect is higher.But be used for noise silencer 4 of the present invention and be not limited thereto pattern.
Though embodiments of the present invention are described, this embodiment only is exemplary, and need not many speeches, and the present invention can change or change by different way and implement.
Embodiment A
Employing has the noise silencer of first embodiment of parameter shown in the table 1, has not only manufactured experimently air-inflation tyre (235/45ZR17) and wheel rim (17 * 7.5JJ) assembly, but also tested the infringement of noise performance and the noise silencer when tire is removed.Air-inflation tyre cures molded and shaped, but does not apply mold release on the inside face of tire.There is not air discharge duct on the surface of the bladder of employed moulding of tyres inside face.Thus, the inside face of tire is finished to the surface of smooth planar and noise silencer is had good tack.
It is that 0.016 ether polyurethane sponge body (Marusuzu K.K. Corp. makes, production number E16) is made that noise silencer uses proportion, its total length be 185cm and as shown in Figure 2 place, the circumferential both ends of its tire have into the convergent portion of miter angle cutting.In the present embodiment, the overall volume in inside tires space (V) is 26154cm
3To 17 (D), show the volume (Vs) and the cross section profile (unit of employed numerical value is millimeter in the chart) thereof of the noise silencer of each embodiment at table 1 and Figure 17 (A).Noise silencer and inside tires surface (tyre surface inside face) are attached to each other by pressure-sensitive adhesion double spread band (being made production number 5000NS by Nitto Denko K.K.).
Test method is as follows:
＜noise performance 〉
Be to assemble tyre and rim under the situation of 200kPa in interior pressure, and whole wheels of automobile (daily output FR automobile, 3000cc discharge capacity) all are equipped with this assembly.When automobile travels with the speed per hour of 60km/H on road noise test road, under the situation of taking a people, the ear location place of people on the chaufeur seat of side near the window tests the noise in the separation, and with comparison increment or the decrement more high or low than the noise (as benchmark) in the separation of embodiment 1 (assembly that does not have noise silencer) near the peak sound pressure level of 230Hz frequency is shown.
Noise silencer durability when＜tire is pulled down 〉
Used tire changing device (making production number WING320 by EIWA company) and tire lever to come to remove the tire of assembly from wheel rim.Prepared 20 assemblies, removed tire by 20 staff.The quantity (N2) that is subjected to the assembly that comes off from tire inner surface such as the quantity (N1) of the assembly of the cutting or the infringement of tearing and noise silencer by contrast is assessed.
The cost of＜noise silencer 〉
The manufacturing cost that manufacturing will be used in 100 noise silencers in the assembly is being that 100 index represents that its intermediate value is the smaller the better with respect to Comparative Examples A 2.
Be pointed out that the noise silencer of Comparative Examples A 2 forms in following mode.Shown in Figure 18 (A) and 18 (B), pressure-sensitive adhesion double spread band 23 is attached on the Zone Full on a surface of tabular cavernous body (S).Shown in Figure 18 (C) and 18 (D), each end that cavernous body is cut into a plurality of strap-like members and each strap-like member all convergent is shaped to form noise silencer.
The noise silencer of Comparative Examples A 3 forms in following mode.Shown in Figure 19 (A) and 19 (B), tabular cavernous body (S) is cut into a plurality of strap-like members.Process the cross section and the end thereof of each strap-like member with cutter, and adhere to pressure-sensitive adhesion double spread band 28 subsequently to obtain noise silencer.
Embodiment B
Adopted the noise silencer of second embodiment of parameter shown in the table 2, not only manufactured experimently the assembly of air-inflation tyre and wheel rim, but also carried out similar embodiment A in test.Such as the parameter of the cross sectional shape of noise silencer is that unit is shown in table 2 and Figure 20 (A) to 20 (F) with the millimeter.
The manufacturing cost that is used for noise silencer is being that 100 index represents that its intermediate value is the smaller the better with respect to comparative example B2.
Be pointed out that the manufacture method of the noise silencer among comparative example B2 and the B3 is the method consistent with the manufacture method of the noise silencer that is used for Comparative Examples A 2 and A3.
Below provide the brief description of test result.
＜Comparative Examples A 2 and B2 〉
The noise silencer of Comparative Examples A 2 and B2 is suitable for the Quantity production of low manufacturing cost.But noise silencer is easy to and the tire lever interference, and does not solve the existing defective of damaging and taking place to separate.
＜Comparative Examples A 3 and B3 〉
When changing of tire, the noise silencer of Comparative Examples A 2 and B2 can suppress the damage on it.But, shown in Figure 19 (B) and 19 (C), after cavernous body is divided into a plurality of strap-like members, because each end portion thickness (te) of each noise silencer is zero, so need form and adhere to pressure-sensitive adhesion double spread band 28 thereon to the cross sectional shape of each strap-like member.So higher and this noise silencer of the manufacturing cost of noise silencer is unsuitable for extensive manufacturing.Shown in Figure 19 (C), the amount of the cavernous body of waste is more, and then earning rate is lower.
＜embodiment A 1 is to A6 and B1 to B8 〉
Noise silencer shows splendid noiseproof feature, and can suppress damage simultaneously when changing of tire.And noise silencer is suitable for extensive manufacturing and can suppresses the generation of waste material so that manufacturing cost reduces.
Embodiment C
Manufactured experimently noise silencer based on the parameter in the table 3, and when making cavernous body, physical property (hardness, tensile strength, ductility and hydrophobic nature) and production capacity have been tested with hydrophobic nature.Use is tested the hygroscopic character of noise silencer by each fabricate block that adheres to noise silencer to the tyre surface inside face of air-inflation tyre (195/65R15) and obtain.Fabricate block under the non-suction state is mounted to wheel rim (15 * 6 sizes), it is carried out the noiseproof feature test.
Except the material difference of cavernous body, all noise silencers all are of similar shape and identical size, and have the square-section of high 3.0cm, wide 7.0cm and long 185cm size.The two ends of each noise silencer all cut into the convergent portion of miter angle.
In each embodiment, the overall volume in inside tires space (V) is 30500cm
3, the volume of noise silencer (Vs) is 3822cm
3And ratio Vs/V is 12.5%.Noise silencer and tire inner surface (tyre surface inside face) are attached to each other with pressure-sensitive adhesion double spread band (made by Nitto Denko K.K. Corp., production number is 5000NS).
Comparative example C1 and C2 use the traditional ether polyurethane sponge body (made by Maru Suzu K.K. Corp., production number is E16) that does not have hydrophober, and in comparative example 2, the surface of noise silencer is covered by anti-water sheet (being polyethylene film among this embodiment).
Test method is as follows:
＜hardness 〉
The method A of the method that is used for hardness of the 6th part of " test method (Testing Method for Soft Urethane Foam) that is used for flexible polyurethane foams " in JIS K6400 comes tested for hardness according to the rules.
＜ductility 〉
Test method at " tensile strength and ductility (the Tensile Strength and an Elongation) " of 10th part of basis in described method on the test block of No. 1 shape is tested ductility.
＜tear strength 〉
Test method according to " tear strength (the A TearingStrength) " of the 11st part in described method is tested tear strength.
＜hydrophobic nature 〉
As shown in figure 21, the test block k that will have a cavernous body of long 300mm, wide 70mm and high 30mm size immerses the pond of depth of water 150mm and kept 24 hours, then the increment of sense weight and this weight and initial weight (corresponding to the weight of dried test block k) compared.
The increment of weight represents with symbol O less than 100% situation of initial weight, but 100% or bigger situation of initial weight are with symbol * represent.
Symbol n indication pressing plate among the figure, it is the punch metal with 5mm aperture that is folded into capital U shape, and test block k is by making all loads be applied thereto in the pressing plate immersion water.Symbol p is that the counterweight (the about 500g of each counterweight) that is arranged in 4 angles of pressing plate n is bubbled through the water column because of buoyancy to prevent pressing plate.
Production capacity during＜cavernous body forms 〉
Show the problem (under problematic situation, problem being described) that the manufacturing process such as whipping step that is used for compound and foaming step etc. produces that whether exists in.
＜hygroscopic character test 〉
Erect 10 tire sets that are attached with noise silencer, under this state, water is poured in the container, under this state, kept noise silencer 24 hours.Then, water is discharged, the surface of the noise silencer of each fabricate block and the water on the tire inner surface are wiped, the increase of weight is detected and show average with cloth.Even do not having under the situation of noise silencer, the inside face of tire can all dry yet, and weight all can increase 10g usually.
After the hygroscopic character test, when interior pressure is 200kPa, with the wheel rim (15 * 6JJ) of mounting of tyre to the right front wheel of automobile (daily output FR automobile, 2000cc discharge capacity), and automobile speed per hour with 100km/h on road is travelled, and assesses by the sensation of chaufeur whether vibration is arranged in motion.In 10 testing tires, show the quantity of vibrative tire.
＜noise performance 〉
Be to be attached with the mounting of tyre of dried noise silencer to automobile (daily output FR automobile under the situation of 200kPa in interior pressure, the wheel rim (15 * 6JJ) of the whole wheels 2000cc discharge capacity), and test automobile when a people takes in the ear place of the people on the chaufeur seat of side near the window is tested on the road (rough surface asphalt roads) noise in the separation when travelling with the speed per hour of 60km/H in road noise, and with the increment of the noise in the separation that is higher or lower than comparative example C1 (assembly that does not have noise silencer) or the peak sound pressure stratification levels that decrement shows near frequency 230Hz as benchmark.
In the his-and-hers watches
*1 to
*5 are described below:
*1 is polyisocyanates (Nihon Urethane K.K. Corp. makes, trademark T-80)
*2 is polyester polyol (Sanyo Kasei K.K. Corp. makes, trademark AH-405)
*3 is polyester-type copolyether polyalcohol (Mitsui Takeda Chemical K.K. Corp. makes, trademark L-50)
*4 is distearyl acid two polyester
*5 is the compound of following material
0.3 the catalyst (amido N, N-DMAE (DMAE)) of part weight
0.3 the metallic catalyst (metal salts of organic acids or stannous octoate) of part weight
1.0 the foaming controlling agent of part weight (Toray Silicon K.K. Corp. makes, trademark SH-193)
Because the hygroscopic character of comparative example C1 is higher, noise silencer becomes the major cause of automobile vibration etc. when being exposed to water.Be pointed out that under comparative example 2 situation, because be coated with anti-water sheet, so 1 hour short period of exposure can not have problems, still, when noise silencer was exposed to water for a long time, the water of introducing from pin hole made Vehicular vibration or the like be tending towards taking place.Particularly, under the situation that water is introduced by pin hole, except removing anti-water sheet, do not have other drying means that is used for cavernous body, and in practice,, have more problem so comparative example 2 compares comparative example 1 because be difficult to find pin hole.
Embodiment C 1 to C5 not only can fully be guaranteed the physical property such as hardness, tensile strength and ductility etc., also demonstrates hydrophobicity performance and reduces moisture absorption, thereby prevent automobile vibration or the like.This embodiment also can show good road noise performance.
Because in comparative example C3, in the combined amount of polyester polyol on the weight less than the value in 3% to 60% scope, so the compatibility deterioration between hydrophober and the polyester-type copolyether polyalcohol, and cause stirring insufficient, make hydrophober not distribute equably thus.Thus, confirmable is even under the situation that hydrophober suitably mixes, can not show hydrophobicity performance by actv..But, in comparative example 4, even the combined amount of polyester polyol surpasses 3% to 60% scope, stirring still can be insufficient, thereby cause to show hydrophobicity performance effectively, this then reduced the tensile strength and the ductility of foam, thereby be difficult to guarantee intensity as noise silencer.
As in comparative example 5,, then, hydrophober can not make foam because playing plasticiser if the combined amount of hydrophober surpasses the scope of 25 to 80 parts of weight.On the contrary, if the combined amount of hydrophober drops to the value that is lower than 25 to 80 parts of weight ranges, then can not show hydrophobicity performance by actv..
If the amount as the water of foaming agent is very few, then foaming makes the proportion of cavernous body excessive because of not having fully, not only the road noise performance is reduced to lower level thus, but also cause tire weight to increase and the deterioration of weight balancing etc. to the disadvantage of tire.
Claims (4)
1. sound control unit for tire, described noise silencer is made by cavernous body, it has the tire inner surface or a basal surface on the wheel rim inside face and the top surface in the face of described inside tires space that are fixed on around the inside tires space, and described noise silencer extends along the tire circumferential direction in described inside tires space
Wherein
Described cavernous body is made of the polyurethane sponge body of hydrophobic nature, and this hydrophobic nature polyurethane sponge body comprises that by foamed solidification the compound of polyisocyanates, polyalcohol, hydrophober and foamer obtains,
Described polyalcohol is the compound of polyester polyol and polyester-type copolyether polyalcohol,
Described polyalcohol comprises that weight accounts for 3% to 60% polyester polyol and weight and accounts for 97% to 40% polyester-type copolyether polyalcohol, and
For the polyalcohol of 100 parts of weight, the amount of hydrophober that is mixed into compound is in the scope of 25 to 80 parts of weight.
2. sound control unit for tire as claimed in claim 1, wherein, described foaming agent is a water, and for the polyalcohol of 100 parts of weight, the combined amount of water is in the scope of 2.5 to 6.0 parts of weight.
3. sound control unit for tire as claimed in claim 1, wherein, described hydrophober is ester, it is to have the monohydroxy alcohol of 14 to 36 carbon atoms and have the aliphatic dicarboxylic acid of 14 to 36 carbon atoms or alicyclic dicarboxylic acid's coupling compound.
4. sound control unit for tire as claimed in claim 1, wherein, described polyalcohol accounts for 15% to 35% polyester polyol and weight by weight and accounts for 85% to 65% polyester-type copolyether polyalcohol and constitute, and, the hydrophober in 30 to 50 parts of weight ranges is mixed into compound for the polyalcohol of 100 parts of weight.
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004336576 | 2004-11-19 | ||
| JP2004336574 | 2004-11-19 | ||
| JP2004336574A JP4567423B2 (en) | 2004-11-19 | 2004-11-19 | Tire silencer |
| JP2004336575 | 2004-11-19 | ||
| JP2004-336574 | 2004-11-19 | ||
| JP2004-336576 | 2004-11-19 | ||
| JP2004336576A JP4567425B2 (en) | 2004-11-19 | 2004-11-19 | Pneumatic tire and rim assembly and method for manufacturing strips used therefor |
| JP2004-336575 | 2004-11-19 | ||
| JP2004336575A JP4567424B2 (en) | 2004-11-19 | 2004-11-19 | Pneumatic tire and rim assembly and method for manufacturing strips used therefor |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101236506A Division CN100493934C (en) | 2004-11-19 | 2005-11-18 | Assembly of pneumatic tire and rim, and a noise damper used therein |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101549618A true CN101549618A (en) | 2009-10-07 |
| CN101549618B CN101549618B (en) | 2011-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101236506A Active CN100493934C (en) | 2004-11-19 | 2005-11-18 | Assembly of pneumatic tire and rim, and a noise damper used therein |
| CN2009101373624A Active CN101549618B (en) | 2004-11-19 | 2005-11-18 | Sound control unit for tire |
| CN2009101373639A Active CN101549619B (en) | 2004-11-19 | 2005-11-18 | Method for forming sound control unit for tire |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005101236506A Active CN100493934C (en) | 2004-11-19 | 2005-11-18 | Assembly of pneumatic tire and rim, and a noise damper used therein |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101373639A Active CN101549619B (en) | 2004-11-19 | 2005-11-18 | Method for forming sound control unit for tire |
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| Country | Link |
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| JP (1) | JP4567423B2 (en) |
| CN (3) | CN100493934C (en) |
Cited By (3)
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| CN108136830A (en) * | 2015-10-15 | 2018-06-08 | 横滨橡胶株式会社 | Pneumatic tire |
| CN111253545A (en) * | 2020-03-24 | 2020-06-09 | 重庆永迪高分子材料有限公司 | Polyurethane soft water-stop foam and preparation method thereof |
| CN112512835A (en) * | 2018-08-01 | 2021-03-16 | 住友橡胶工业株式会社 | Pneumatic tire with noise reducing body and method of manufacturing the same |
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| JP4575874B2 (en) * | 2005-11-18 | 2010-11-04 | 横浜ゴム株式会社 | Soft polyurethane foam for tire, noise reduction device and tire |
| JP5347555B2 (en) * | 2008-05-09 | 2013-11-20 | 横浜ゴム株式会社 | Tire noise reduction device and pneumatic tire equipped with the same |
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| JP4830014B2 (en) * | 2009-09-08 | 2011-12-07 | 本田技研工業株式会社 | Vehicle wheel |
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| JP6235990B2 (en) * | 2014-10-17 | 2017-11-22 | 住友ゴム工業株式会社 | Sealant tire |
| KR101767077B1 (en) * | 2016-03-29 | 2017-08-11 | 넥센타이어 주식회사 | pneumatic tire |
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- 2005-11-18 CN CNB2005101236506A patent/CN100493934C/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108136830A (en) * | 2015-10-15 | 2018-06-08 | 横滨橡胶株式会社 | Pneumatic tire |
| CN108136830B (en) * | 2015-10-15 | 2020-06-09 | 横滨橡胶株式会社 | Pneumatic tire |
| CN112512835A (en) * | 2018-08-01 | 2021-03-16 | 住友橡胶工业株式会社 | Pneumatic tire with noise reducing body and method of manufacturing the same |
| CN111253545A (en) * | 2020-03-24 | 2020-06-09 | 重庆永迪高分子材料有限公司 | Polyurethane soft water-stop foam and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006143020A (en) | 2006-06-08 |
| CN101549618B (en) | 2011-01-26 |
| JP4567423B2 (en) | 2010-10-20 |
| CN101549619A (en) | 2009-10-07 |
| CN1775573A (en) | 2006-05-24 |
| CN100493934C (en) | 2009-06-03 |
| CN101549619B (en) | 2011-01-26 |
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