A low-noise patterned tire and its manufacturing method

Abstract

The present invention relates to the field of tires, and discloses a preparation method for a low-noise tread tire, including: Step a: Using simulation research to predict the crosslinking density of the tire rubber compounds at various parts of the tire, and adjusting the rubber compound formulations of each component of the tire; Step b: The shaping vulcanizer preheats the mold and the bladder to a preset preheating temperature; Step c: When the shaping vulcanizer closes the mold for vulcanization, a vulcanization pressure is selected, and the crosslinking density of the tire rubber compound is adjusted by adjusting the vulcanization time and the vulcanization temperature to make the tire reach the state of proper vulcanization; Step e: After vulcanization is completed, vulcanization cooling is carried out; The crosslinking density G of the tire rubber compound is set according to the heat transfer rate P of the rubber compound; Among them, the crosslinking density G of the tire rubber compound is corrected according to the vulcanization time T; The crosslinking density G of the corrected tire rubber compound is secondarily corrected according to the vulcanization temperature W. The present invention improves the performance of tire vulcanization by improving the rubber performance; and reduces the pumping noise by improving the tire tread structure.

Description

Technical Field

[0001] The present invention relates to the field of tires, in particular to a low-noise tread tire and a preparation method thereof. Background Art

[0002] There are two excitations that can cause a rolling tire to generate noise: the unevenness of the road surface and the tread pattern processed on the tire crown. These two excitations will cause vibrations of the tire structure, vibrations of the air inside the tire, and vibrations of the air in the tread grooves; when the tire rolls on the road surface, the tread pattern at the front of the tire imprint hits the road surface, at this time the air is squeezed into the tread grooves, and at the same time the tread pattern blocks are compressed, resulting in a reduction in the volume of the tread grooves. In this way, the air existing in the tread grooves is also compressed and its volume is reduced. When it leaves the contact area, the air is suddenly released, just like water splashing out when opening a bottle. The noise caused by this phenomenon of being squeezed first and then released is called pumping noise. Therefore, the more discontinuous tread grooves on the tread surface, or the smoother the road surface, the greater the pumping noise generated.

[0003] The quality of the tire tread pattern is related to tire vulcanization. Tire vulcanization is one of the extremely important processes in the tire manufacturing process. It endows rubber with various valuable physical and mechanical properties, making rubber products have a certain strength, good elasticity and wear resistance, so as to meet various engineering applications. Due to the very complex structure and material components of the tire, and rubber is a poor conductor of heat, during vulcanization, different parts of the tire are heated differently. When the thinner parts such as the sidewall are in a serious over-vulcanized state, the thicker parts such as the shoulder may still be in an under-vulcanized state. The serious over-vulcanized state will also lead to serious vulcanization reversion phenomenon, thereby reducing the tire performance, and the under-vulcanized rubber compound is still a viscous fluid and cannot reach the performance index required by the design. How to make the tire obtain a uniform crosslinking density of the tire rubber compound is an urgent problem to be solved in the tire production process. Summary of the Invention

[0004] The object of the present invention is to provide a low-noise tread tire and a preparation method thereof, by optimizing the vulcanization process, improving the rubber performance, and further improving the tire vulcanization performance; by improving the tire tread pattern structure, reducing the pumping noise.

[0005] To achieve the above object, the present invention provides a method for preparing a low-noise tread tire, which is characterized by comprising: Step a: Using finite element technology to simulate and study the vulcanization process of the tread tire, predicting the crosslink density of the tire rubber compound at each part of the tire, and adjusting the rubber compound formula of each component of the tire; Step b: During the mold preheating stage of the shaping vulcanizer, preheating the mold and the bladder to a preset preheating temperature, and performing embryo sorting work; Step c: When the shaping vulcanizer is closing the mold for vulcanization, selecting the vulcanization pressure, and adjusting the crosslink density of the tire rubber compound by adjusting the vulcanization time and vulcanization temperature to make the tire reach the state of proper vulcanization; Step d: After vulcanization, perform vulcanization cooling; In Step a, setting the crosslink density G of the tire rubber compound according to the rubber compound heat transfer rate P; In Step c, correcting the crosslink density G of the tire rubber compound according to the vulcanization time T; and performing secondary correction on the corrected crosslink density G of the tire rubber compound according to the vulcanization temperature W.

[0006] In some embodiments of the present application, a preset rubber compound heat transfer rate matrix P0 is preset, and P0 is set as (P1, P2, P3, P4), where P1 is the first preset rubber compound heat transfer rate, P2 is the second preset rubber compound heat transfer rate, P3 is the third preset rubber compound heat transfer rate, and P4 is the fourth preset rubber compound heat transfer rate, and P1 < P2 < P3 < P4; a preset crosslink density matrix G0 of the tire rubber compound is preset, and G0 is set as (G1, G2, G3, G4), where G1 is the first preset crosslink density of the tire rubber compound, G2 is the second preset crosslink density of the tire rubber compound, G3 is the third preset crosslink density of the tire rubber compound, and G4 is the fourth preset crosslink density of the tire rubber compound, and G1 < G2 < G3 < G4; setting the crosslink density G of the tire rubber compound according to the relationship between the rubber compound heat transfer rate P and each preset rubber compound heat transfer rate: when P ≤ P1, selecting the first preset crosslink density G1 of the tire rubber compound as the crosslink density G of the tire rubber compound; when P1 < P ≤ P2, selecting the second preset crosslink density G2 of the tire rubber compound as the crosslink density G of the tire rubber compound; when P2 < P ≤ P3, selecting the third preset crosslink density G3 of the tire rubber compound as the crosslink density G of the tire rubber compound; when P3 < P ≤ P4, selecting the fourth preset crosslink density G4 of the tire rubber compound as the crosslink density G of the tire rubber compound.

[0007] In some embodiments of the present application, the vulcanization time T is obtained in real time. A preset vulcanization time matrix T0 is preset. For the preset vulcanization time matrix T0, T0(T1, T2, T3, T4) is set, where T1 is the first preset vulcanization time, T2 is the second preset vulcanization time, T3 is the third preset vulcanization time, T4 is the fourth preset vulcanization time, and T1 < T2 < T3 < T4; a preset correction coefficient matrix ai is preset. For the preset correction coefficient matrix ai, ai(a1, a2, a3, a4) is set, where a1 is the first preset correction coefficient, a2 is the second preset correction coefficient, a3 is the third preset correction coefficient, a4 is the fourth preset correction coefficient, and a1 < a2 < a3 < a4; according to the relationship between the vulcanization time T and each preset vulcanization time, the i-th preset correction coefficient ai is selected to correct the crosslinking density G of the tire rubber compound, where i = 1, 2, 3, 4: when T ≤ T1, the first preset correction coefficient a1 is selected to correct the crosslinking density G of the tire rubber compound, and the crosslinking density of the corrected tire rubber compound is G*a1; when T1 < T ≤ T2, the second preset correction coefficient a2 is selected to correct the crosslinking density G of the tire rubber compound, and the crosslinking density of the corrected tire rubber compound is G*a2; when T2 < T ≤ T3, the third preset correction coefficient a3 is selected to correct the crosslinking density G of the tire rubber compound, and the crosslinking density of the corrected tire rubber compound is G*a3; when T3 < T ≤ T4, the fourth preset correction coefficient a4 is selected to correct the crosslinking density G of the tire rubber compound, and the crosslinking density of the corrected tire rubber compound is G*a4.

[0008] In some embodiments of the present application, the vulcanization temperature W is obtained in real time. A preset vulcanization temperature matrix W0 is preset. For the preset vulcanization temperature matrix W0, W0(W1, W2, W3, W4) is set, where W1 is the first preset vulcanization temperature, W2 is the second preset vulcanization temperature, W3 is the third preset vulcanization temperature, and W4 is the fourth preset vulcanization temperature, and W1 < W2 < W3 < W4; A preset secondary correction coefficient matrix bj is also preset. For the preset correction coefficient matrix bj, bj(b1, b2, b3, b4) is set, where j = 1, 2, 3, 4, b1 is the first preset secondary correction coefficient, b2 is the second preset secondary correction coefficient, b3 is the third preset secondary correction coefficient, and b4 is the fourth preset secondary correction coefficient, and b1 < b2 < b3 < b4; After selecting the i-th preset correction coefficient ai to correct the crosslinking density G of the tire compound, then according to the relationship between the vulcanization temperature W and each preset vulcanization temperature, the j-th preset secondary correction coefficient bj is selected to perform a secondary correction on the crosslinking density G*ai of the corrected tire compound, where j = 1, 2, 3, 4: When W ≤ W1, select the first preset secondary correction coefficient b1 to perform a secondary correction on the crosslinking density G*ai of the corrected tire compound, and the crosslinking density of the secondary-corrected tire compound is G*ai*b1; When W1 < W ≤ W2, select the second preset secondary correction coefficient b2 to perform a secondary correction on the crosslinking density G*ai of the corrected tire compound, and the crosslinking density of the secondary-corrected tire compound is G*ai*b2; When W2 < W ≤ W3, select the third preset secondary correction coefficient b3 to perform a secondary correction on the crosslinking density G*ai of the corrected tire compound, and the crosslinking density of the secondary-corrected tire compound is G*ai*b3; When W3 < W ≤ W4, select the fourth preset secondary correction coefficient b4 to perform a secondary correction on the crosslinking density G of the corrected tire compound, and the crosslinking density of the secondary-corrected tire compound is G*ai*b4.

[0009] In some embodiments of the present application, in step c, the rubber compound thickness D of the tire is obtained in real time. A preset rubber compound thickness matrix D0 of the preset tire is preset, and D0(D1, D2, D3, D4) is set, where D1 is the first preset rubber compound thickness of the preset tire, D2 is the second preset rubber compound thickness of the preset tire, D3 is the third preset rubber compound thickness of the preset tire, and D4 is the fourth preset rubber compound thickness of the preset tire, where D1 < D2 < D3 < D4; The vulcanization temperature W is set according to the relationship between the rubber compound thickness D of the tire and each preset rubber compound thickness of the preset tire: When D ≤ D1, select the first preset vulcanization temperature W1 as the vulcanization temperature W; When D1 < D ≤ D2, select the second preset vulcanization temperature W2 as the vulcanization temperature W; When D2 < D ≤ D3, select the third preset vulcanization temperature W3 as the vulcanization temperature W; When D3 < D ≤ D4, select the fourth preset vulcanization temperature W4 as the vulcanization temperature W.

[0010] To achieve the above object, the present invention also provides a device for a low-noise patterned tire. The device includes: a rubber compound ratio module, which is used to simulate and study the vulcanization process of the patterned tire by using finite element technology, predict the crosslinking density of the tire rubber compound at each part of the tire, and adjust the rubber compound formula of each component of the tire; a preheating module, which is used to preheat the mold and the bladder to a preset preheating temperature and perform embryo sorting work during the mold preheating stage of the shaping vulcanizer; a vulcanization module, which is used to select a vulcanization pressure when the shaping vulcanizer performs mold closing and vulcanization, and adjust the crosslinking density of the tire rubber compound by adjusting the vulcanization time and vulcanization temperature to make the tire reach the state of proper vulcanization; a vulcanization cooling module, which is used to perform vulcanization cooling after vulcanization is completed.

[0011] In some embodiments of the present application, the device further includes: a vulcanization degree adjustment module, which is used to set the crosslinking density G of the tire rubber compound according to the heat transfer rate P of the rubber compound; correct the crosslinking density G of the tire rubber compound according to the vulcanization time T; and perform secondary correction on the corrected crosslinking density G of the tire rubber compound according to the vulcanization temperature W.

[0012] To achieve the above object, the present invention also provides a low-noise patterned tire. The tire tread pattern includes pattern grooves and pattern ribs; the pattern grooves and the pattern ribs are arranged at intervals; and a plurality of silent columns are arranged in the pattern grooves.

[0013] In some embodiments of the present application, the pattern ribs include a first tread rib, a second tread rib, and a shoulder rib; a first groove is formed in the first tread rib and communicates with the pattern groove; a second groove is formed in the second tread rib and communicates with the pattern groove; and a third groove is formed in the shoulder rib and communicates with the pattern groove.

[0014] In some embodiments of the present application, fine stripes are formed on both sides of the first tread rib and the second tread rib; and a plurality of micro-protrusions are arranged on the inner wall of the pattern groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 is a flowchart of the preparation method of the low-noise patterned tire provided by the embodiment of the present invention;

[0017] Figure 2It is a schematic diagram of the low-noise tread tire device provided by an embodiment of the present invention;

[0018] Figure 3 It is a schematic diagram of the low-noise tread tire provided by an embodiment of the present invention;

[0019] Figure 4 It is a front view of the low-noise tread tire provided by an embodiment of the present invention;

[0020] Figure 5 It is a partial enlarged view of A provided by an embodiment of the present invention;

[0021] Among them, 1, tread groove; 2, tread rib; 3, first tread rib; 4, second tread rib; 5, shoulder rib; 6, sound-absorbing column; 7, first groove; 8, second groove; 9, third groove; 10, fine stripe; 11, tire. Detailed implementation manners

[0022] The following will further describe in detail the specific implementation manners of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0023] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0024] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0025] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0026] Such as Figure 1As shown in the figure, this embodiment discloses a preparation method for a low-noise patterned tire, including: Step a: Using finite element technology to conduct a simulation study on the vulcanization process of the patterned tire, predicting the crosslink density of the tire rubber compound at each part of the tire, and adjusting the rubber compound formula of each part of the tire; Step b: During the model preheating stage of the shaping vulcanizer, preheating the mold and bladder to a preset preheating temperature, and performing embryo sorting work; Step c: When the shaping vulcanizer is closing the mold for vulcanization, selecting the vulcanization pressure, and adjusting the crosslink density of the tire rubber compound by adjusting the vulcanization time and vulcanization temperature to make the tire reach the state of proper vulcanization; Step d: After vulcanization, perform vulcanization cooling; In Step a, set the crosslink density G of the tire rubber compound according to the heat transfer rate P of the rubber compound; In Step c, correct the crosslink density G of the tire rubber compound according to the vulcanization time T; Perform a secondary correction on the corrected crosslink density G of the tire rubber compound according to the vulcanization temperature W.

[0027] Effectively controlling the vulcanization degree of each part of the tire can improve the quality of the tire; ensuring that each part of the tire reaches proper vulcanization simultaneously, the vulcanization process and rubber compound formula can be adjusted so that each part of the tire is in the state of proper vulcanization. During the vulcanization process, external heating or radiation causes a chemical reaction between the raw rubber and vulcanizing agent (crosslinking agent) in the rubber compound components or between the raw rubbers, crosslinking the linear rubber macromolecules into a three-dimensional network structure of macromolecules.

[0028] Unvulcanized rubber is a linear structure macromolecule, and the molecular chains can move freely. When subjected to external forces, its molecular chains are prone to displacement, showing large deformation and plastic flow. The molecular structure of vulcanized rubber contains a network structure to varying degrees, restricting the relative movement of macromolecules, resulting in vulcanized rubber having a greater tensile strength, smaller elongation at break, and greater elasticity than raw rubber. For example, the inner liner rubber of a radial tire requires good airtight performance. As the crosslink density of the rubber increases, the voids in the network structure are small, and the ability of gas to pass through and diffuse in the rubber is weakened due to obstruction. Therefore, rubber reaching the proper vulcanization point has better air permeability resistance than under-vulcanized rubber. Thus, it is necessary to ensure that the inner liner rubber reaches proper vulcanization. The crosslink density of the tire rubber compound implemented above is the rubber crosslink density of the tire at the time of proper vulcanization.

[0029] It can be understood that in the above embodiment, the crosslink density G of the tire rubber compound is set according to the heat transfer rate P of the rubber compound; the crosslink density G of the tire rubber compound is corrected according to the vulcanization time T; a secondary correction is performed on the corrected crosslink density G of the tire rubber compound according to the vulcanization temperature W. This can avoid over-vulcanization and under-vulcanization states, greatly improving various properties of the rubber, enabling the rubber product tire to obtain physical and mechanical properties and other properties that can meet the product's use requirements.

[0030] In some specific embodiments of the present application, a preset rubber compound heat transfer rate matrix P0 is preset, and P0(P1, P2, P3, P4) is set, where P1 is the first preset rubber compound heat transfer rate, P2 is the second preset rubber compound heat transfer rate, P3 is the third preset rubber compound heat transfer rate, and P4 is the fourth preset rubber compound heat transfer rate, and P (P1<P2<P3<P4); a crosslink density matrix G0 of the preset tire rubber compound is preset, and G0(G1, G2, G3, G4) is set, where G1 is the crosslink density of the first preset tire rubber compound, G2 is the crosslink density of the second preset tire rubber compound, G3 is the crosslink density of the third preset tire rubber compound, and G4 is the crosslink density of the fourth preset tire rubber compound, and G1<G2<G3<G4; the crosslink density G of the tire rubber compound is set according to the relationship between the rubber compound heat transfer rate P and each preset rubber compound heat transfer rate: when P≤P1, the crosslink density G1 of the first preset tire rubber compound is selected as the crosslink density G of the tire rubber compound; when P1<P≤P2, the crosslink density G2 of the second preset tire rubber compound is selected as the crosslink density G of the tire rubber compound; when P2<P≤P3, the crosslink density G3 of the third preset tire rubber compound is selected as the crosslink density G of the tire rubber compound; when P3<P≤P4, the crosslink density G4 of the fourth preset tire rubber compound is selected as the crosslink density G of the tire rubber compound.

[0031] It can be understood that, in the above embodiment, by setting the crosslink density G of the tire rubber compound according to the relationship between the vulcanization pressure P and each preset vulcanization pressure, the accuracy of the selection of the crosslink density G of the tire rubber compound can be improved, and the over-vulcanization state and under-vulcanization state can be avoided.

[0032] In some specific embodiments of the present application, the vulcanization time T is obtained in real time, and a preset vulcanization time matrix T0 is preset. For the preset vulcanization time matrix T0, T0(T1, T2, T3, T4) is set, where T1 is the first preset vulcanization time, T2 is the second preset vulcanization time, T3 is the third preset vulcanization time, and T4 is the fourth preset vulcanization time, and T1 < T2 < T3 < T4; a preset correction coefficient matrix ai is preset. For the preset correction coefficient matrix ai, ai(a1, a2, a3, a4) is set, where a1 is the first preset correction coefficient, a2 is the second preset correction coefficient, a3 is the third preset correction coefficient, and a4 is the fourth preset correction coefficient, and a1 < a2 < a3 < a4; according to the relationship between the vulcanization time T and each preset vulcanization time, the i-th preset correction coefficient ai is selected to correct the crosslinking density G of the tire rubber compound, where i = 1, 2, 3, 4: when T ≤ T1, the first preset correction coefficient a1 is selected to correct the crosslinking density G of the tire rubber compound, and the crosslinking density of the corrected tire rubber compound is G*a1; when T1 < T ≤ T2, the second preset correction coefficient a2 is selected to correct the crosslinking density G of the tire rubber compound, and the crosslinking density of the corrected tire rubber compound is G*a2; when T2 < T ≤ T3, the third preset correction coefficient a3 is selected to correct the crosslinking density G of the tire rubber compound, and the crosslinking density of the corrected tire rubber compound is G*a3; when T3 < T ≤ T4, the fourth preset correction coefficient a4 is selected to correct the crosslinking density G of the tire rubber compound, and the crosslinking density of the corrected tire rubber compound is G*a4.

[0033] It can be understood that in the above embodiments, by selecting the i-th preset correction coefficient ai according to the relationship between the vulcanization time T and each preset vulcanization time to correct the crosslinking density G of the tire rubber compound, the accuracy of the selection of the crosslinking density G of the tire rubber compound can be further improved, and the over-vulcanization state and under-vulcanization state can be avoided.

[0034] In some specific embodiments of the present application, the vulcanization temperature W is obtained in real time. A preset vulcanization temperature matrix W0 is preset. For the preset vulcanization temperature matrix W0, W0 (W1, W2, W3, W4) is set, where W1 is the first preset vulcanization temperature, W2 is the second preset vulcanization temperature, W3 is the third preset vulcanization temperature, W4 is the fourth preset vulcanization temperature, and W1 < W2 < W3 < W4; a preset secondary correction coefficient matrix bj is also preset. For the preset correction coefficient matrix bj, bj (b1, b2, b3, b4) is set, where j = 1, 2, 3, 4, b1 is the first preset secondary correction coefficient, b2 is the second preset secondary correction coefficient, b3 is the third preset secondary correction coefficient, b4 is the fourth preset secondary correction coefficient, and b1 < b2 < b3 < b4; when the selected ith preset correction coefficient ai is used to correct the crosslinking density G of the tire rubber compound, and then according to the relationship between the vulcanization temperature W and each preset vulcanization temperature, the selected jth preset secondary correction coefficient bj is used to perform secondary correction on the corrected crosslinking density G*ai of the tire rubber compound, where j = 1, 2, 3, 4: when W ≤ W1, the first preset secondary correction coefficient b1 is selected to perform secondary correction on the corrected crosslinking density G*ai of the tire rubber compound, and the crosslinking density of the secondary-corrected tire rubber compound is G*ai*b1; when W1 < W ≤ W2, the second preset secondary correction coefficient b2 is selected to perform secondary correction on the corrected crosslinking density G*ai of the tire rubber compound, and the crosslinking density of the secondary-corrected tire rubber compound is G*ai*b2; when W2 < W ≤ W3, the third preset secondary correction coefficient b3 is selected to perform secondary correction on the corrected crosslinking density G*ai of the tire rubber compound, and the crosslinking density of the secondary-corrected tire rubber compound is G*ai*b3; when W3 < W ≤ W4, the fourth preset secondary correction coefficient b4 is selected to perform secondary correction on the corrected crosslinking density G of the tire rubber compound, and the crosslinking density of the secondary-corrected tire rubber compound is G*ai*b4.

[0035] It can be understood that in the above embodiment, after the selected ith preset correction coefficient ai is used to correct the crosslinking density G of the tire rubber compound, and then according to the relationship between the vulcanization temperature W and each preset vulcanization temperature, the selected jth preset secondary correction coefficient bj is used to perform secondary correction on the corrected crosslinking density G*ai of the tire rubber compound, which can further improve the accuracy of the crosslinking density G of the corrected tire rubber compound and avoid over-vulcanization and under-vulcanization states.

[0036] In some specific embodiments of the present application, in step c, the rubber compound thickness D of the tire is obtained in real time, and a preset rubber compound thickness matrix D0 of the preset tire is set in advance, where D0(D1, D2, D3, D4), and D1 is the rubber compound thickness of the first preset tire, D2 is the rubber compound thickness of the second preset tire, D3 is the rubber compound thickness of the third preset tire, and D4 is the rubber compound thickness of the fourth preset tire, and D1 < D2 < D3 < D4; the vulcanization temperature W is set according to the relationship between the rubber compound thickness D of the tire and the rubber compound thicknesses of each preset tire: when D ≤ D1, the first preset vulcanization temperature W1 is selected as the vulcanization temperature W; when D1 < D ≤ D2, the second preset vulcanization temperature W2 is selected as the vulcanization temperature W; when D2 < D ≤ D3, the third preset vulcanization temperature W3 is selected as the vulcanization temperature W; when D3 < D ≤ D4, the fourth preset vulcanization temperature W4 is selected as the vulcanization temperature W.

[0037] The selection of the vulcanization temperature is related to the thickness of the product. Rubber is a poor conductor of heat. Especially for thick rubber products such as tires, it is difficult to make the inner and outer rubber compounds reach the flat section of the vulcanization curve simultaneously with high-temperature vulcanization. During the vulcanization process, the heating rate of the rubber compound is slow; it is particularly difficult to make the internal and external temperatures of thick rubber products such as tires uniform, so sometimes when the inside of the product is under-vulcanized or just at the proper vulcanization state, the surface has been over-vulcanized.

[0038] It can be understood that the above embodiments can improve the pattern shaping quality and avoid pattern shaping failure and affecting the tire quality by determining the shaping quality Z of the low-noise pattern tire according to the rubber compound thickness D of the tire; correcting the shaping quality Z of the low-noise pattern tire according to the shaping pressure AP of the first shaping operation; and secondarily correcting the shaping quality Z of the low-noise pattern tire according to the shaping pressure BP of the second shaping operation.

[0039] As Figure 2 shown, this embodiment discloses a device for a low-noise pattern tire, and the device includes: a rubber compound ratio module for simulating and studying the vulcanization process of the pattern tire by using finite element technology, predicting the crosslink density of the tire rubber compound at each part of the tire, and adjusting the rubber compound formula of each part of the tire; a preheating module for preheating the mold and the bladder to a preset preheating temperature and performing embryo preparation work during the model preheating stage of the shaping vulcanizer; a vulcanization module for selecting a vulcanization pressure during the mold closing and vulcanization of the shaping vulcanizer, and adjusting the crosslink density of the tire rubber compound by adjusting the vulcanization time and the vulcanization temperature to make the tire reach the proper vulcanization state; a vulcanization cooling module for performing vulcanization cooling after the vulcanization is completed.

[0040] In some specific embodiments of the present application, the device further includes: a vulcanization degree adjustment module, configured to set the crosslinking density G of the tire rubber compound according to the heat transfer rate P of the rubber compound; correct the crosslinking density G of the tire rubber compound according to the vulcanization time T; and perform a secondary correction on the corrected crosslinking density G of the tire rubber compound according to the vulcanization temperature W.

[0041] As Figure 3 shown, this embodiment discloses a low-noise tread tire. The tread pattern of the tire includes tread grooves 1 and tread ribs 2; the tread grooves 1 and the tread ribs 2 are arranged at intervals; and a plurality of sound-absorbing columns 6 are arranged in the tread grooves 1.

[0042] It can be understood that in the above embodiment, by setting the tread grooves 1 and the tread ribs 2 with different widths, the frequency spectrum diagram is promoted to become smoother, reducing noise; a plurality of sound-absorbing columns 6 are arranged in the tread grooves 1 to break the air flow in the tread grooves 1, thereby reducing the pumping noise in the grooves.

[0043] In some specific embodiments of the present application, the tread rib 2 includes a first tread rib 3, a second tread rib 4, and a shoulder rib 5; a first groove 7 is formed in the first tread rib 3 and communicates with the tread groove 1; a second groove 8 is formed in the second tread rib 4 and communicates with the tread groove 1; and a third groove 9 is formed in the shoulder rib 5 and communicates with the tread groove 1.

[0044] In some specific embodiments of the present application, fine stripes 10 are formed on both sides of the first tread rib 3 and the second tread rib 4. A plurality of micro-protrusions are provided on the inner wall of the tread groove.

[0045] It can be understood that in the above embodiment, by providing the first groove 7, the second groove 8, and the third groove 9 to communicate with the tread groove 1, it is avoided that air is compressed into the tread groove 1 to form a closed space and generate pumping noise; wherein the tread patterns of the first groove 7, the second groove 8, and the third groove 9 are different, and the tread blocks are designed with dislocation to prevent the tread from contacting and leaving the ground simultaneously, avoiding large excitations at different positions of the tire; fine stripes 10 are formed on both sides of the first tread rib 3 and the second tread rib 4 to disrupt the gas flow and vibration in the grooves, and the cavity resonance noise in the tread groove 1 is controlled to reduce noise.

[0046] In summary, the present invention discloses a low-noise tread tire and a preparation method thereof. By optimizing the vulcanization process, the rubber properties are improved, and then the vulcanization performance of the tire is improved; by improving the tire tread pattern structure, the pumping noise is reduced. [[ID=ID=22]]

[0047] It should be understood that although the steps in the flowcharts of the embodiments of the present invention are shown in sequence according to the indications of the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, there is no strict order limit for the execution of these steps, and these steps can be executed in other orders. Moreover, at least a part of the steps in each embodiment may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages does not have to be sequential either, but can be executed alternately or in turn with at least a part of other steps or sub-steps or stages of other steps.

[0048] Those of ordinary skill in the art can understand that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A preparation method of a low-noise pattern tire, characterized in that, Including: Step a: Use finite element technology to simulate the vulcanization process of the patterned tire, predict the crosslink density of the tire rubber compound at each part of the tire, and adjust the rubber compound formula of each part of the tire. Step b: During the model preheating stage of the shaping vulcanizer, preheat the mold and bladder to the preset preheating temperature and carry out embryo sorting work. Step c: When the shaping vulcanizer performs mold closing and vulcanization, select the vulcanization pressure, and adjust the crosslink density of the tire rubber compound by adjusting the vulcanization time and vulcanization temperature to make the tire reach the proper vulcanization state. Step d: After vulcanization, perform vulcanization cooling. In step a, set the crosslink density G of the tire rubber compound according to the heat transfer rate P of the rubber compound; in step c, correct the crosslink density G of the tire rubber compound according to the vulcanization time T; perform secondary correction on the corrected crosslink density G of the tire rubber compound according to the vulcanization temperature W. Preset a preset rubber compound heat transfer rate matrix P0, set P0(P1, P2, P3, P4), where P1 is the first preset rubber compound heat transfer rate, P2 is the second preset rubber compound heat transfer rate, P3 is the third preset rubber compound heat transfer rate, P4 is the fourth preset rubber compound heat transfer rate, and P1 < P2 < P3 < P4; preset a preset crosslink density matrix G0 of the tire rubber compound, set G0(G1, G2, G3, G4), where G1 is the first preset crosslink density of the tire rubber compound, G2 is the second preset crosslink density of the tire rubber compound, G3 is the third preset crosslink density of the tire rubber compound, G4 is the fourth preset crosslink density of the tire rubber compound, and G1 < G2 < G3 < G4. Set the crosslink density G of the tire rubber compound according to the relationship between the heat transfer rate P of the rubber compound and each preset rubber compound heat transfer rate: When P ≤ P1, select the crosslink density G1 of the first preset tire rubber compound as the crosslink density G of the tire rubber compound. When P1 < P ≤ P2, select the crosslink density G2 of the second preset tire rubber compound as the crosslink density G of the tire rubber compound. When P2 < P ≤ P3, select the crosslink density G3 of the third preset tire rubber compound as the crosslink density G of the tire rubber compound. When P3 < P ≤ P4, select the crosslink density G4 of the fourth preset tire rubber compound as the crosslink density G of the tire rubber compound. Obtain the vulcanization time T in real time. Preset a preset vulcanization time matrix T0. For the preset vulcanization time matrix T0, set T0(T1, T2, T3, T4), where T1 is the first preset vulcanization time, T2 is the second preset vulcanization time, T3 is the third preset vulcanization time, T4 is the fourth preset vulcanization time, and T1 < T2 < T3 < T4; preset a preset correction coefficient matrix ai. For the preset correction coefficient matrix ai, set ai(a1, a2, a3, a4), where a1 is the first preset correction coefficient, a2 is the second preset correction coefficient, a3 is the third preset correction coefficient, a4 is the fourth preset correction coefficient, and a1 < a2 < a3 < a4. Select the i-th preset correction coefficient ai to correct the crosslinking density G of the tire rubber compound according to the relationship between the vulcanization time T and each preset vulcanization time, where i = 1, 2, 3, 4: When T ≤ T1, select the first preset correction coefficient a1 to correct the crosslinking density G of the tire rubber compound, and the crosslinking density of the corrected tire rubber compound is G*a1; When T1 < T ≤ T2, select the second preset correction coefficient a2 to correct the crosslinking density G of the tire rubber compound, and the crosslinking density of the corrected tire rubber compound is G*a2; When T2 < T ≤ T3, select the third preset correction coefficient a3 to correct the crosslinking density G of the tire rubber compound, and the crosslinking density of the corrected tire rubber compound is G*a3; When T3 < T ≤ T4, select the fourth preset correction coefficient a4 to correct the crosslinking density G of the tire rubber compound, and the crosslinking density of the corrected tire rubber compound is G*a4; Obtain the vulcanization temperature W in real time. There is a preset vulcanization temperature matrix W0. For the preset vulcanization temperature matrix W0, set W0(W1, W2, W3, W4), where W1 is the first preset vulcanization temperature, W2 is the second preset vulcanization temperature, W3 is the third preset vulcanization temperature, and W4 is the fourth preset vulcanization temperature, and W1 < W2 < W3 < W4; There is also a preset secondary correction coefficient matrix bj. For the preset correction coefficient matrix bj, set bj(b1, b2, b3, b4), where j = 1, 2, 3, 4, b1 is the first preset secondary correction coefficient, b2 is the second preset secondary correction coefficient, b3 is the third preset secondary correction coefficient, and b4 is the fourth preset secondary correction coefficient, and b1 < b2 < b3 < b4; After selecting the i-th preset correction coefficient ai to correct the crosslinking density G of the tire rubber compound, then select the j-th preset secondary correction coefficient bj according to the relationship between the vulcanization temperature W and each preset vulcanization temperature to perform a secondary correction on the crosslinking density G*ai of the corrected tire rubber compound, where j = 1, 2, 3, 4: When W ≤ W1, select the first preset secondary correction coefficient b1 to perform a secondary correction on the crosslinking density G*ai of the corrected tire rubber compound, and the crosslinking density of the tire rubber compound after the secondary correction is G*ai*b1; When W1 < W ≤ W2, select the second preset secondary correction coefficient b2 to perform a secondary correction on the crosslinking density G*ai of the corrected tire rubber compound, and the crosslinking density of the tire rubber compound after the secondary correction is G*ai*b2; When W2 < W ≤ W3, select the third preset secondary correction coefficient b3 to perform a secondary correction on the crosslinking density G*ai of the corrected tire rubber compound, and the crosslinking density of the tire rubber compound after the secondary correction is G*ai*b3; When W3 < W ≤ W4, select the fourth preset secondary correction coefficient b4 to perform a secondary correction on the crosslinking density G of the corrected tire rubber compound, and the crosslinking density of the tire rubber compound after the secondary correction is G*ai*b4.

2. The preparation method of the low-noise treaded tire according to claim 1, characterized in that, In step c, the thickness D of the tire compound is obtained in real time. A preset thickness matrix D0 of the tire compound for the preset tire is set, where D0(D1, D2, D3, D4), and D1 is the thickness of the tire compound of the first preset tire, D2 is the thickness of the tire compound of the second preset tire, D3 is the thickness of the tire compound of the third preset tire, and D4 is the thickness of the tire compound of the fourth preset tire, and D1 < D2 < D3 < D4; Set the vulcanization temperature W according to the relationship between the thickness D of the tire compound of the tire and the thicknesses of the tire compounds of each preset tire: When D ≤ D1, select the first preset vulcanization temperature W1 as the vulcanization temperature W; When D1 < D ≤ D2, select the second preset vulcanization temperature W2 as the vulcanization temperature W; When D2 < D ≤ D3, select the third preset vulcanization temperature W3 as the vulcanization temperature W; When D3 < D ≤ D4, select the fourth preset vulcanization temperature W4 as the vulcanization temperature W.

3. A device for a low-noise tread tire, which is used to execute the preparation method of the low-noise tread tire according to any one of claims 1-2, and includes: A compound ratio module, which is used to simulate and study the vulcanization process of the tread tire by using finite element technology, predict the crosslinking density of the tire compound at each part of the tire, and adjust the compound formula of each part of the tire; A preheating module, which is used to preheat the mold and the bladder to a preset preheating temperature and perform embryo finishing work during the mold preheating stage of the shaping vulcanizer; A vulcanization module, which is used to select a vulcanization pressure when the shaping vulcanizer performs mold closing and vulcanization, and adjust the crosslinking density of the tire compound by adjusting the vulcanization time and vulcanization temperature to make the tire reach the state of proper vulcanization; A vulcanization cooling module, which is used to perform vulcanization cooling after vulcanization; It further includes: a vulcanization degree adjustment module, which is used to set the crosslinking density G of the tire compound according to the heat transfer rate P of the compound; Correct the crosslinking density G of the tire compound according to the vulcanization time T; perform secondary correction on the corrected crosslinking density G of the tire compound according to the vulcanization temperature W.

4. A low-noise tread tire is achieved by the preparation method of the low-noise tread tire according to any one of claims 1-2, and is characterized in that, The tire tread pattern includes tread grooves and tread ribs; the tread grooves and the tread ribs are arranged at intervals; a plurality of sound-absorbing columns are arranged in the tread grooves.

5. The low-noise pattern tire according to claim 4, characterized in that, The tread ribs include a first tread rib, a second tread rib and a shoulder rib; a first groove is formed on the first tread rib and communicates with the tread groove; a second groove is formed on the second tread rib and communicates with the tread groove; a third groove is formed on the shoulder rib and communicates with the tread groove.

6. The low-noise patterned tire according to claim 5, characterized in that, Fine stripes are arranged on both sides of the first tread rib and the second tread rib; a plurality of micro-protrusions are arranged on the inner wall of the tread groove.

Images