WO2016067434A1 - 振動抑制タイヤ - Google Patents
振動抑制タイヤ Download PDFInfo
- Publication number
- WO2016067434A1 WO2016067434A1 PCT/JP2014/078991 JP2014078991W WO2016067434A1 WO 2016067434 A1 WO2016067434 A1 WO 2016067434A1 JP 2014078991 W JP2014078991 W JP 2014078991W WO 2016067434 A1 WO2016067434 A1 WO 2016067434A1
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- WIPO (PCT)
- Prior art keywords
- tire
- layer
- dilatant
- particles
- layer structure
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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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- 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
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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
- B60C5/00—Inflatable pneumatic tyres or inner tubes
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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
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/12—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim
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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
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
Definitions
- the present invention relates to a tire having a vibration suppression structure for improving ride comfort performance and a method for manufacturing the tire.
- Vehicle tires vibrate when traveling on the ground.
- the vibration of the vehicle body is generated when the structure from the tire to the vehicle body vibrates due to the deformation of the tire when the tire and the ground contact. Since the vibration of the vehicle body greatly affects the ride comfort of the vehicle, the vehicle and tire manufacturers are working on research and development to suppress the vibration with the tire and prevent the vibration from being transmitted to the vehicle body.
- FIG. 1 is a conceptual cross-sectional view of a conventional tire.
- the mechanism for transmitting vibration from the tire to the vehicle body is that the tire material itself is vibrated and transmitted to the vehicle body through the wheel 12, shaft and suspension.
- the deformation of the tire due to the contact between the tire and the ground starts with the contact surface of the tread 13 first, deforms and vibrates the “side wall” 14 (the side surface portion of the tire), and then the wheel 12 and the air chamber 11 inside the tire. Communicated.
- Patent Document 1 a thin-layer structure portion composed of a layer in which particles and a binding material thereof are arranged to behave as a dilatant is arranged on a tire inner surface, which is a property of a dilatant “behaves like a liquid in a small shear stress”. It is a device that efficiently suppresses deformation due to contact between the tire and the ground by utilizing the property of acting like a solid for large shear stress.
- Patent Document 1 requires a very difficult operation in the manufacturing process of uniformly bonding thin layers of sheets evenly when the thin layer structure is very thin (within 2 mm). It was not possible to meet the development requirements to improve the effect with thinner and lighter sheets. In addition, only the thin layer structure portion composed of a single dilatant layer may adversely affect the motion characteristics of the tire.
- the cause of the invention in Patent Document 1 is that the dilatant layer is in the cross-sectional direction in the thin layer structure portion. Since there is no feature for causing a difference in the reaction rate, the reaction rate of the dilatant layer during vibration due to contact between the tire and the ground and separation becomes uniform in the cross-sectional direction of the thin layer structure part, As a result, the smooth deformation of the tire is hindered.
- the present invention has a dilatant layer having a characteristic for causing a difference in reaction rate in the cross-sectional direction in the thin layer structure portion, so that even a very thin single layer or a small number of layers can be used for the tire.
- An object of the present invention is to provide a vibration-suppressing tire that has a thin-layer structure portion that functions without impairing motion characteristics, is easy to manufacture, and is low-cost.
- the present invention provides a dilatant layer, which is a layer in which particles and a binding material thereof are arranged so as to act as a dilatant.
- a tire having a thin layer structure including a dilatant layer in which the particles are arranged so that the distribution density of the particles decreases toward the lower side has been developed.
- the vibration suppression tire which has the characteristic for producing the difference in the reaction speed in a cross-sectional direction within a thin layer structure part can be provided.
- the present invention provides an elastic binder layer in which the thin layer structure is a layer for joining the dilatant layer to another member and protecting the dilatant layer. Has been further developed in the upper layer and / or lower layer of the dilatant layer itself. Thereby, the dilatant layer can be protected and the vibration absorption effect can be enhanced.
- ditant refers to a mixture that exhibits the property of acting like a liquid in a small shear stress and acting like a solid in a large shear stress. It is classified as a kind of non-Newtonian fluid.
- the present invention having the above-described configuration, it is possible to provide a vibration suppression tire having characteristics for causing a difference in reaction rate in the cross-sectional direction within the thin-layer structure, and thus having a single layer or a small number of layers. It is possible to provide a tire that absorbs vibration without hindering smooth deformation of the tire with only a thinner and lighter thin-layer structure.
- the tire of the present embodiment is a dilatant layer that is a layer in which particles and a binding material thereof are arranged to behave as a dilatant, and the distribution of the particles from the center of the layer toward the upper side of the layer and the lower side of the layer It has a thin layer structure part including a dilatant layer in which the particles are arranged so that the density is lowered.
- FIG. 1 is a conceptual cross-sectional view of a conventional general tire
- FIG. 2 is a conceptual cross-sectional view of a tire in the first embodiment.
- the difference between the two figures is the presence or absence of the thin layer structure (0200).
- FIG. 3 shows an example of the simplest configuration of the thin layer structure.
- the thin layer structure (0200) in FIG. 2 is disposed on the tire inner surface (18). Further, as shown in FIG. 3, the thin layer structure (0200) is composed of one dilatant layer, and the distribution density of the particles from the central part of the layer toward the upper side of the layer and the lower side of the layer. The particles are arranged so as to be lowered.
- the “dilatant layer” (0310) is a layer in which particles and a binding material thereof are arranged to behave as a dilatant. Further, “behaving as a dilatant” means that it behaves like a liquid for a small shear stress and behaves like a solid for a large shear stress.
- inorganic oxide particles such as alumina particles and silica particles can be used.
- alumina particles those having a particle size ranging from 1 ⁇ m to 100 ⁇ m are commercially available.
- the particle size of the particles dispersed in the binder if the particle size is too large, the surface of the stirrer or the roller may be damaged during the kneading of the binder in the production. Therefore, the particle size should be relatively small from 1 ⁇ m to 10 ⁇ m. Is desirable.
- the binder constituting the dilatant layer has the property of retaining particles, and has elasticity so that the thin layer structure portion will not be irreversibly deformed and damaged even when subjected to deformation during tire rotation. It is necessary that the molecular size and the surface tension be small enough to enter between the two.
- the binder having these properties include polymer compounds such as rubber, paints, pressure-sensitive adhesives, and adhesives.
- the distribution density in the cross-sectional direction of the particles in the dilatant layer may be characterized by having the characteristic of absorbing vibration without inhibiting the smooth deformation of the tire only by the dilatant layer. desirable.
- FIG. 4 is a graph showing the relationship between the particle density and the reaction rate of Dunlatancy. When the particle density is high, the dilatancy reaction rate is high, while when the particle density is low, the dilatancy reaction rate is low. Therefore, if the particle density of the dilatant layer is constant, the entire dilatant layer reacts at the same time, suddenly increases in hardness and generates a repulsive force. The vibration cannot be absorbed without hindering the smooth deformation of the tire.
- the dilatant layer of the tire according to the present invention is “the particles are arranged so that the distribution density of the particles decreases from the center of the layer toward the upper side of the layer and the lower side of the layer”. From the center of the layer toward the upper side of the layer and the lower side of the layer, there are portions of varying particle density. Therefore, in the tire according to the present invention, the reaction rate of the dilatancy decreases from the central part of the layer toward the upper side of the layer and the lower side of the layer, and gradually increases in hardness as the distance from the central part increases. Absorbing does not impair the softness required for large tire deformation in road contact and separation, so that the effect of absorbing vibration can be exhibited without inhibiting smooth deformation of the tire.
- the degree to which the distribution density decreases is This includes not only the case where the vehicle is even on the lower side but also the case where the vehicle is arranged with a distribution density that takes into account the influence of centrifugal force during travel.
- the centrifugal force here becomes larger on the tire outer side than on the tire center side.
- the distribution density during the stop is closer to the center of the tire as shown in FIG.
- the distribution density of the particles decreases “evenly” from the center of the dilatant layer toward the upper side of the layer and the lower side of the layer due to the influence of centrifugal force during traveling. Therefore, it is possible to effectively absorb vibrations caused by contact with the running ground (a manufacturing method will be described later).
- the specific gravity of the alumina particles when the standard material used as a reference is rubber is desirably within a range in which dilatancy can be efficiently exhibited while maintaining the strength of the layer.
- alumina particles having a particle diameter of 4 ⁇ m to 5 ⁇ m are used, if the alumina particles are dispersed so that the specific gravity of the alumina particles is 1.5 to 3.0 with respect to rubber as a reference standard material, Dilatancy can be efficiently exhibited while maintaining the strength of the.
- the alumina particles having a particle diameter of 4 ⁇ m to 5 ⁇ m are used, the alumina particles are dispersed so that the specific gravity of the alumina particles is 2.0 to 2.5 with respect to rubber as a reference standard material.
- the specific gravity of the alumina particles when the standard material used as a reference is rubber is preferably in the range of 1.5 to 3.0, and more preferably in the range of 2.0 to 2.5. Is desirable.
- the thickness of the thin-layer structure portion should be 1 / 100th to 1 / 10th the thickness of the tread portion of the tire from the viewpoint of achieving a vibration reduction effect and realizing weight reduction. desirable.
- this suitable thickness depends on various conditions, such as tire size (from ordinary car size to heavy truck, mining heavy truck, jumbo jet tire, etc.), rotational speed (regular car level or F1 machine). Or a monorail tire), an impact received by a tire (for an ordinary car, an off-road car, an aircraft tire), and the like.
- the degree of exhibiting dilatancy can vary depending on the type / mass / particle size / shape / density of the particles used, the binding material used, and the elasticity / density of the particles.
- the dilatant layer is subjected to a load of centrifugal force due to air pressure inside the tire and rotation of the tire in the tire, so that the thickness of the layer is compressed when the tire is rotating compared to when it is not rotating. . This also changes the relative arrangement of the particles and their binders and can change the degree of dilatancy.
- the shape and structure of the particles are not particularly limited.
- the particles may have a hollow structure, and the inside of the hollow structure may contain a polymer compound, a polar solvent, or a non-Newtonian fluid. These contents can enhance the vibration reduction effect by absorbing kinetic energy when subjected to stress.
- the particles can be geometric shapes with larger packing density, such as round or spherical with facets, and the dilatancy can be adjusted by selecting particles with a specific shape or structure. Is possible.
- the “thin layer structure part” is composed of a dilatant layer in which particles and a binding material thereof are arranged so as to behave as a dilatant.
- the thin layer structure part needs to be composed only of a dilatant layer. Instead, another layer may be disposed above or below the dilatant layer, or between the dilatant layers.
- the thin-layer structure unit includes an elastic binder layer that is a layer for protecting the dilatant layer by bonding the dilatant layer to another member (including another dilatant layer), and an upper layer of the dilatant layer itself. It can also be further included in the lower layer (details will be described in Example 2). Adhesion between the dilatant layer and the binder layer and between the inside of the tire and the thin layer structure is made by using the bonding material and the binder layer as the adhesive itself, an adhesive paint or elastic material, or heat generated by vulcanization. Although it can carry out by selecting the material which adheres by reaction, it is not limited to this.
- One of the binder layers used for layer formation can also include a material that prevents air leakage during puncture.
- the thin layer structure is formed on the outer surface of the tire (the bottom surface portion or / and the side surface portion of the groove formed by the tread pattern), the inside of the tire, or the inner surface of the tire (the tread surface inside the tire, which is in contact with the air chamber). Either can be provided. When provided on the inner surface of the tire, it becomes easier to suppress vibration.
- the thin layer structure portion is composed of a single dilatant layer, it exhibits a sufficient vibration suppressing function.
- the thin layer structure portion acts as a vibration damping member against abrupt deformation caused by contact or separation between the tire and the ground.
- the air pressure inside the tire and the centrifugal force from the inside of the tire are applied to the dilatant layer, which causes the particles in the dilatant layer to interact with each other. It is easy to rub against each other.
- direct contact including the case of indirect contact via a bonding material sandwiched between them
- the dilatant layer behaves like a liquid and deforms, and the particles rub against each other at that time, thereby converting the kinetic energy of the particles into thermal energy. This conversion to thermal energy attenuates the vibration propagating through the entire tire.
- the tread undergoes a rapid deformation, and exerts a force opposite to the air pressure and centrifugal force received so far on the thin layer structure.
- the dilatant layer thus released from the load suddenly behaves like a solid with respect to a large shear stress, that is, exhibits a dilatancy and tries to suppress deformation and vibration.
- suppressing the deformation of the tire in contact with the ground and the separation itself will inhibit the smooth deformation of the tire and impair its motion characteristics. It is controlled so as to be performed gradually with a time lag by giving such features as.
- the thin layer structure portion has a function of locally and intensively suppressing the vibration of the tire caused by the deformation impact without inhibiting the smooth deformation of the tire.
- the thin layer structure has the same effect as a local mass damper for shape stabilization.
- the mass damper generally refers to a weight member provided in the tire in order to suppress the vibration of the tire. That is, the thin layer structure can suppress the vibration of the tire without deteriorating the tire performance.
- the laminar structure is immediately subjected to only steady air pressure and centrifugal force in the tire.
- the properties of the liquid immediately return to the properties of the original liquid, and vibration is continuously suppressed by the friction of the particles.
- the tread rapidly recovers from the deformation, and at that time, a force opposite to the air pressure and the centrifugal force is suddenly exerted on the thin layer structure portion.
- the thin layer structure portion suppresses the vibration of the tire due to the effect of dilatancy without inhibiting the smooth deformation of the tire due to the feature of the cross-sectional direction.
- the particles in the thin layer structure are pressed and separated from each other in the vertical and horizontal directions. Due to this force, the bonding material in the gaps between the particles repeatedly compresses and restores, and the hysteresis loss that occurs at that time causes the bonding material to convert kinetic energy into thermal energy, so that the vibration of the entire tire is attenuated.
- FIG. 7 is an experimental result showing the relationship between the tire according to the present invention and temperature suppression.
- the internal temperature of the tire tester was set to 25 ° C., and the surface temperature at the bottom of the second groove from the outside of the tire when the tire temperature was saturated under various conditions described in the table was compared. Is.
- the thin layer structure portion installed on the inner surface of the tire is a single layer sheet made of rubber and alumina particles having a thickness of 0.6 mm, and the specific gravity is 2.6.
- the tire size was 215/50 / R17.
- the temperature of the tire tread surface is about 1.8 degrees compared to a tire with a rubber with the same weight attached thereto or a normal tire. I understand that it is decreasing. Further, it can be seen that when the speed is 72 km / h, the temperature of the tire tread surface is reduced by about 2.7 degrees as compared with a tire attached with rubber of the same weight or a normal tire. Further, it can be seen that when the speed is 108 km / h, the temperature of the tire tread surface is about 3.5 degrees lower than that of a tire with a rubber of the same weight and a normal tire. In addition, when the load is 5254 N and the speed is 80 km / h, the temperature on the tire tread surface is about 4.3 degrees lower than that of a tire with a rubber of the same weight or a normal tire. I understand.
- the thin layer structure portion is effective in reducing vibration and suppressing temperature.
- the thin layer structure itself can be manufactured with a material that is light and inexpensive relative to the weight of the tire, it is possible to suppress an increase in the total weight and manufacturing cost of the entire tire by adding it. It is. *
- the method for manufacturing a tire according to the present invention includes (1) a method of producing a sheet having a thin layer structure by kneading a binder such as rubber and alumina particles and then cooling the resultant, and placing the sheet on the tire. And (2) a method of generating a thin layer structure by injecting heated particles onto the tire inner surface or tire tread surface after vulcanization. Since the former is a basic manufacturing method, the former will be described as a “basic manufacturing method”, and the latter will be described as an “applied manufacturing method”.
- FIG. 8 is a flowchart showing an example of a tire manufacturing method according to this embodiment.
- a thin layer structure part including a dilatant layer that is a layer in which particles and a binding material thereof are arranged to behave as a dilatant is generated (thin layer structure part generation step, S0810).
- the thin layer structure portion is disposed in the tire or near the tire inner surface by heat treatment and pressure treatment (thin layer structure portion pressure treatment step, S0820).
- the thin layer structure generation step (S0810) specifically includes the following steps.
- FIG. 9 is a diagram showing a state of kneading using a stirring device (0903) when rubber (0901) is used as a binder and alumina particles (0902) are used as particles.
- a stirring device (0903) when rubber (0901) is used as a binder and alumina particles (0902) are used as particles.
- stirrer is used, but it is sufficient if it is suitable for kneading, and a roller may be used instead of the stirrer.
- FIG. 10 is a diagram showing a state in which the rubber in which the alumina particles are uniformly dispersed by kneading is cooled.
- the cooling method may be natural cooling or forced cooling. For example, if it is desired to equalize the degree of “the distribution density of the particles decreases from the center of the layer toward the upper side of the layer and the lower side of the layer”, it is realized by sandwiching the material with the same thermal conductivity from above and below. be able to. Further, if it is desired to arrange such that the distribution density during the stop is closer to the center of the tire, it can be realized by cooling the surface on the outer side of the tire using a material having higher thermal conductivity.
- FIG. 10 shows the distribution density of alumina particles before cooling, while (b) shows the distribution density of alumina particles after cooling.
- cooling it is desirable to form a sheet of rubber in which alumina particles are uniformly dispersed in order to facilitate placement on a later tire.
- the distribution density of the alumina particles before cooling is uniform as a whole.
- cured is hardened in an order from the part away from the center part of the layer by being cooled from both ends. By solidifying sequentially from the end, the alumina particles that were initially uniformly dispersed are pushed out to the softer central side. Then, at the time after the entire cooling is completed, the distribution density of the alumina particles decreases from the center of the layer toward the upper side of the layer and the lower side of the layer. In this way, a “thin layer structure including a dilatant layer in which the particles are arranged so that the distribution density of the particles decreases from the center of the layer toward the upper side of the layer and the lower side of the layer” is manufactured. .
- the thin layer structure pressurizing step (S0820) is the following process.
- this thin-layer structure part is a sheet form, it can be arrange
- the thin layer structure generated in the thin layer structure generation step is disposed inside the tire intermediate structure to form a green tire including the thin layer structure. The green tire is put in a mold and a vulcanization process is performed.
- a heat and pressure treatment is performed to vulcanize, and a tire in which the thin layer structure portion is disposed (fixed) inside the tire is completed. Thereby, it is possible to manufacture a tire having a vibration suppressing structure.
- FIG. 11 is a flowchart showing an applied manufacturing method.
- a vulcanized tire is prepared (post-vulcanized tire preparation step, S1110). This point is different from the basic manufacturing method.
- alumina particles heated to 300 to 400 degrees Celsius are jetted at a high speed at a high speed onto the inner surface of the vulcanized tire or the tire tread surface (particle jetting step, S1120).
- particle jetting step, S1120 the surface rubber is melted by high-temperature heat to form a hole, and after the alumina particles have plunged into the inside, the formed hole is closed again by the melted rubber. Since the tire surface is mainly composed of the original rubber and the rubber with the holes closed, the particle density of the alumina particles is reduced.
- the particles are discharged from the nozzle to the rotated tire.
- the amount, angle, and speed of spraying particles from the nozzle, installing multiple nozzles, and finally spraying heated gas it is possible to adjust the particle arrangement and control it to an appropriate layer It is.
- FIG. 12 shows a tire manufactured according to the present invention by an applied manufacturing method.
- the time series shifts in the order of (a), (b), and (c).
- the alumina particles heated to 300 to 400 degrees Celsius are injected at high speed onto the inner surface of the tire, the density of the alumina particles on the tire center side is the highest.
- the part with a high density of alumina particles moves to the outside of the tire.
- a thin layer structure including a dilatant layer in which alumina particles are dispersed in an appropriate density distribution so as to exert an effect by the influence of centrifugal force is completed.
- the portion up to which the injected alumina particles have reached can be regarded as the thin layer structure portion.
- ⁇ Effect> it is possible to provide a vibration-suppressing tire having a characteristic for causing a difference in reaction speed in the thin layer structure portion, and therefore, the thin layer structure portion including only the dilatant layer inhibits smooth deformation of the tire.
- the tire of the present embodiment can be manufactured by simply installing a member using a lighter and cheaper material as compared with the conventional technique.
- the tire of this example is basically the same as that of Example 1, but the dilatant layer is bonded to another member and an elastic binder layer, which is a layer for protecting the dilatant layer, is used as the dilatant layer. Further included in the upper layer and / or the lower layer of itself. By having the said structure, it becomes possible to protect the structure of a dilatant layer more. In addition, the vibration suppressing effect can be further enhanced.
- FIG. 13 is a conceptual diagram showing a configuration example of the thin layer structure portion in the present embodiment.
- the thin layer structure is composed of one dilatant layer (1310) and two binder layers (1320).
- the dilatant layer is the same as in Example 1.
- the binder layer will be described.
- the “binder layer” (1320) is a layer for joining the dilatant layer (1310) to other members at the upper part and / or the lower part in the thin layer structure.
- the other member may include another dilatant layer. This makes it possible to further protect the dilatant layer as compared with the case where there is no binder layer, so that the structure can be maintained even when subjected to deformation of the tire, and there is an effect that damage is reduced. .
- the binder layer in order to suppress vibration, it is desirable to use a material having elasticity similar to the binder constituting the dilatant layer. Also, stickiness and adhesiveness are required to hold the dilatant layer, so use paint, rubber, adhesive, adhesive, tape (base material and adhesive or adhesive composite material), etc. It is also possible to do.
- the same material as the binder may be used, but is not limited to this.
- the surface of the binder of the dilatant layer was exposed to the air after forming the dilatant layer using the binder and before forming the binder layer.
- the vibration suppressing effect due to friction can be enhanced as in the case of different materials.
- the dilatant layer in which the tire is not deformed by contact with the ground while traveling on the road behaves like a liquid under the influence of centrifugal force due to the rotation of the tire, so that the particles in the dilatant layer Rub against each other and convert the kinetic energy of the particles into thermal energy.
- the binder layer is further disposed, the dilatant layer and the binder layer are rubbed with each other to be converted into thermal energy. Therefore, the vibration transmitted through the entire tire and the resonance of the air chamber are attenuated.
- FIG. 14 is a flowchart showing an example of a tire manufacturing method according to the present embodiment.
- a thin layer structure part including a dilatant layer which is a layer in which particles and a binding material thereof are arranged so as to behave as a dilatant, is generated (thin layer structure part generation step, S1410).
- the thin layer structure portion is disposed in the tire or near the tire inner surface by heat treatment and pressure treatment (thin layer structure portion pressure treatment step, S1420).
- the thin layer structure generation step (S1410) in the present embodiment is a step of forming a dilatant layer (dilatant layer formation step, S1411) similar to that of the first embodiment, and forming a binder layer in an overlapping manner (binder).
- a layer forming step, S1412) is added.
- binder layer using the same material as the binder of the dilatant layer and the material of the binder layer, or to modify the outermost surface of the dilatant layer without forming the binder layer additionally. It is also possible to form the binder layer by actively changing the binding state of the molecules (for example, a change by spraying some material, a change by irradiating light, for example, ultraviolet rays, etc.).
- the dilatant layer is protected and covered with the binder layer, so that in the intermediate process of completing the dilatant layer, the integrity of the particles of the dilatant layer and the binder, Alternatively, the integrity of the particles in the dilatant layer may be weak.
- particles coated with a polymer compound that becomes a binder only after reacting with heat and pressure can be used. Particles having such a coating can be sandwiched between thin sheet-like raw rubbers serving as a binder layer in the tire manufacturing process, and a dilatant layer satisfying the function as a dilatant material can be formed in the tire after the vulcanization process.
- the thin layer structure may be a part of the structure of the inner liner 17 that is one of the components of the tire.
- the thin layer structure pressurizing step (S1420) is basically the same as the thin layer structure pressurizing step of the first embodiment. However, since a binder layer is newly added in the present embodiment, this portion will be described below.
- the thin layer structure portion generated in the thin layer structure portion generation step is disposed inside the tire intermediate structure to form a green tire including the thin layer structure portion.
- the green tire is put in a mold and a vulcanization process is performed. In this vulcanization process, a heat and pressure treatment is performed, and the tire is vulcanized and the thin layer structure portion is disposed (fixed) inside the tire.
- the thin layer structure is in a state in which particles are dispersed in the binder in the dilatant layer, and the dilatant layer and the binder layer form a layer that satisfies the above-described conditions by reacting to heat and pressure. It becomes such a structure.
- an elastic binder layer which is a layer for joining the dilatant layer to another member or protecting the dilatant layer, is formed on an upper layer and / or a lower layer of the dilatant layer itself. Further inclusion makes it possible to further protect the dilatant layer. In addition, the vibration suppressing effect can be enhanced. Furthermore, it leads to further reduction of noise.
- Air chamber 11 Wheel 12 Tread 13 Side wall 14 Inner liner 17 Tire inner surface 18 Particle 19 Binder 20 Thin layer structure 0200, 1300 Dilatant layer 0310, 1310 Binder layer 1320 Rubber 0901 Alumina particles 0902 Stirring equipment 0903
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Abstract
Description
本実施例のタイヤは、ダイラタントとして振る舞うように粒子とその結合材が配置された層であるダイラタント層であって、層の央部から層の上側及び層の下側に向かって前記粒子の分布密度が下がるように前記粒子が配置されたダイラタント層を含む薄層構造部を有することを特徴とする。
図1は、従来の一般的なタイヤの断面概念図であり、図2は、実施例1におけるタイヤの断面概念図である。両図の違いは、薄層構造部(0200)の有無にある。さらに、図3は、薄層構造部の最も単純な構成の一例を示すものである。
以下路面走行中のダイラタント層の作用を説明する。
本発明に係るタイヤの製造方法は、(1)ゴムなどの結合材とアルミナ粒子を混錬して、その後に冷却することにより薄層構造部のシートを生成し、それをタイヤに配置する方法と、(2)加硫の終わったタイヤ内表面もしくはタイヤトレッド表面に熱した粒子を噴射することにより薄層構造部を生成する方法がある。前者が基本的な製造方法なので、前者を「基本的な製造方法」として説明し、後者を「応用的な製造方法」として説明する。
図8は、本実施例のタイヤの製造方法の一例を示すフローチャートである。まず、ダイラタントとして振る舞うように粒子とその結合材が配置された層であるダイラタント層を含む薄層構造部を生成する(薄層構造部生成ステップ、S0810)。次に、薄層構造部を加熱処理と加圧処理によってタイヤ内部またはタイヤ内部表面付近に配置する(薄層構造部加圧処理ステップ、S0820)。
応用的な製造方法について、アルミナ粒子を用いる場合を例として説明する。図11は、応用的な製造方法を示すフローチャートである。
本実施例により、薄層構造部内で反応速度の違いを生じさせるための特徴を有する振動抑制タイヤを提供することができ、もって、ダイラタント層のみの薄層構造部でタイヤのスムーズな変形を阻害せずに振動を吸収するタイヤを提供することができる。また、振動による騒音の低減にもつながる。さらに、本実施例のタイヤは従来の技術と比較して、より軽量かつ安価な材料を用いた部材を簡易な方法で設置するだけで製造することが可能となる。
本実施例のタイヤは、基本的に実施例1と同様であるが、前記ダイラタント層を他の部材と接合し、前記ダイラタント層を保護するための層である弾性を有するバインダー層を、ダイラタント層自身の上層又は/及び下層にさらに含むことを特徴とする。当該構成を有することにより、ダイラタント層の構造をより保護することが可能となる。また、振動抑制効果をさらに高めることが可能となる。
図13は、本実施例における薄層構造部の構成例を示す概念図である。本実施例では薄層構造部は1つのダイラタント層(1310)と2つのバインダー層(1320)から構成されている。ダイラタント層については、実施例1と同様である。以下、バインダー層について説明する。
本実施例のタイヤの製造方法は基本的に実施例1と同様であり、相違点はバインダー層の形成の有無である。図14は、本実施例のタイヤの製造方法の一例を示すフローチャートである。まず、ダイラタントとして振る舞うように粒子とその結合材が配置された層であるダイラタント層を含む薄層構造部を生成する(薄層構造部生成ステップ、S1410)。次に、薄層構造部を加熱処理と加圧処理によってタイヤ内部またはタイヤ内部表面付近に配置する(薄層構造部加圧処理ステップ、S1420)。そして、本実施例における薄層構造部生成ステップ(S1410)は、実施例1と同様のダイラタント層の形成ステップ(ダイラタント層形成ステップ、S1411)に加えて、バインダー層を重ねて形成するステップ(バインダー層形成ステップ、S1412)を追加したものである。
本実施例のタイヤは、前記ダイラタント層を他の部材と接合したり、あるいは前記ダイラタント層を保護したりするための層である弾性を有するバインダー層を、ダイラタント層自身の上層又は/及び下層にさらに含むことで、ダイラタント層をより保護することが可能となる。また、振動抑制効果も高めることが可能となる。さらに、騒音のより一層の低減にもつながる。
ホイール 12
トレッド 13
サイドウォール 14
インナーライナー 17
タイヤ内部表面 18
粒子 19
結合材 20
薄層構造部 0200、1300
ダイラタント層 0310、1310
バインダー層 1320
ゴム 0901
アルミナ粒子 0902
攪拌機器 0903
Claims (2)
- ダイラタントとして振る舞うように粒子とその結合材が配置された層であるダイラタント層であって、
層の央部から層の上側及び層の下側に向かって前記粒子の分布密度が下がるように前記粒子が配置されたダイラタント層を含む薄層構造部を有するタイヤ。 - 前記薄層構造部は、
前記ダイラタント層を他の部材と接合し、前記ダイラタント層を保護するための層である弾性を有するバインダー層を、ダイラタント層自身の上層又は/及び下層にさらに含む請求項1に記載のタイヤ。
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
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DK14905152.6T DK3213937T3 (da) | 2014-10-30 | 2014-10-30 | Vibravibrationsdæmpende dæk |
CN201480083015.7A CN107000509B (zh) | 2014-10-30 | 2014-10-30 | 振动抑制轮胎 |
KR1020177014729A KR101960620B1 (ko) | 2014-10-30 | 2014-10-30 | 진동억제 타이어 |
PT149051526T PT3213937T (pt) | 2014-10-30 | 2014-10-30 | Pneu de supressão de vibração |
EP14905152.6A EP3213937B1 (en) | 2014-10-30 | 2014-10-30 | Vibration suppression tire |
PCT/JP2014/078991 WO2016067434A1 (ja) | 2014-10-30 | 2014-10-30 | 振動抑制タイヤ |
JP2016556142A JP6607456B2 (ja) | 2014-10-30 | 2014-10-30 | 振動抑制タイヤ |
US15/523,443 US10919345B2 (en) | 2014-10-30 | 2014-10-30 | Vibration suppression tire |
ES14905152T ES2906395T3 (es) | 2014-10-30 | 2014-10-30 | Neumático con absorción de vibraciones |
PL14905152T PL3213937T3 (pl) | 2014-10-30 | 2014-10-30 | Opona tłumiąca drgania |
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PCT/JP2014/078991 WO2016067434A1 (ja) | 2014-10-30 | 2014-10-30 | 振動抑制タイヤ |
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US (1) | US10919345B2 (ja) |
EP (1) | EP3213937B1 (ja) |
JP (1) | JP6607456B2 (ja) |
KR (1) | KR101960620B1 (ja) |
CN (1) | CN107000509B (ja) |
DK (1) | DK3213937T3 (ja) |
ES (1) | ES2906395T3 (ja) |
PL (1) | PL3213937T3 (ja) |
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Also Published As
Publication number | Publication date |
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EP3213937B1 (en) | 2021-12-08 |
CN107000509B (zh) | 2018-11-30 |
KR20170078786A (ko) | 2017-07-07 |
EP3213937A1 (en) | 2017-09-06 |
US10919345B2 (en) | 2021-02-16 |
JP6607456B2 (ja) | 2019-11-20 |
PT3213937T (pt) | 2022-01-18 |
JPWO2016067434A1 (ja) | 2017-08-10 |
EP3213937A4 (en) | 2018-06-06 |
ES2906395T3 (es) | 2022-04-18 |
DK3213937T3 (da) | 2022-03-07 |
KR101960620B1 (ko) | 2019-03-20 |
CN107000509A (zh) | 2017-08-01 |
PL3213937T3 (pl) | 2022-04-04 |
US20170313139A1 (en) | 2017-11-02 |
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