CN113492624A - Tire, tire manufacturing method, and tire mold - Google Patents
Tire, tire manufacturing method, and tire mold Download PDFInfo
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- CN113492624A CN113492624A CN202010261020.XA CN202010261020A CN113492624A CN 113492624 A CN113492624 A CN 113492624A CN 202010261020 A CN202010261020 A CN 202010261020A CN 113492624 A CN113492624 A CN 113492624A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 239000011324 bead Substances 0.000 claims abstract description 118
- 239000000463 material Substances 0.000 claims abstract description 48
- 238000005452 bending Methods 0.000 claims abstract description 5
- 239000003963 antioxidant agent Substances 0.000 claims description 49
- 230000003078 antioxidant effect Effects 0.000 claims description 49
- 229920001971 elastomer Polymers 0.000 claims description 34
- 239000005060 rubber Substances 0.000 claims description 34
- 239000006229 carbon black Substances 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- 239000013543 active substance Substances 0.000 claims description 17
- 244000043261 Hevea brasiliensis Species 0.000 claims description 15
- 229920003052 natural elastomer Polymers 0.000 claims description 15
- 229920001194 natural rubber Polymers 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 14
- LRCFXGAMWKDGLA-UHFFFAOYSA-N dioxosilane;hydrate Chemical compound O.O=[Si]=O LRCFXGAMWKDGLA-UHFFFAOYSA-N 0.000 claims description 11
- 229960004029 silicic acid Drugs 0.000 claims description 11
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 10
- 230000003712 anti-aging effect Effects 0.000 claims description 9
- 238000009472 formulation Methods 0.000 claims description 8
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 7
- 239000004636 vulcanized rubber Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 238000005299 abrasion Methods 0.000 abstract description 17
- 230000008859 change Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 6
- 230000006835 compression Effects 0.000 abstract description 6
- 230000020169 heat generation Effects 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000004513 sizing Methods 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 4
- 230000035882 stress Effects 0.000 description 3
- 239000012190 activator Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229960001866 silicon dioxide Drugs 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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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
- B60C1/0016—Compositions of the tread
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
-
- 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
- B60C1/0025—Compositions of the sidewalls
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
- B29D2030/0607—Constructional features of the moulds
- B29D2030/0616—Surface structure of the mould, e.g. roughness, arrangement of slits, grooves or channels
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a tire, a manufacturing method of the tire and a mold of the tire, comprising the following steps: the tire comprises a tire tread and two tire beads, wherein the two tire beads are respectively connected with the tire tread at two edges of the tire tread, the tire tread and the tire beads are made of different materials and are integrally formed, the tire tread is made of a material with higher ground gripping performance and wear resistance than the tire beads, and the tire beads are made of a material with higher bending resistance and weather resistance than the tire tread. Compared with the tire tread, the material used for the tire bead has more excellent low-heating and deflection-resistant performances, and meanwhile has better elasticity and elongation, the compression permanent deformation change is larger, and the comfort is improved; compared with the tire bead, the tire tread uses materials with better abrasion resistance, superior ground gripping performance, higher stress at definite elongation and hardness, relatively lower elasticity and elongation and smaller compression permanent deformation change, thereby leading the tire to have better abrasion resistance and heat generation resistance.
Description
Technical Field
The invention relates to the field of chemical engineering, in particular to a tire, a manufacturing method of the tire and a mold of the tire.
Background
With the rise of vehicle models such as scooters, balance cars and the like, the market share of maintenance-free tires is getting larger and larger, most tires are molded and vulcanized by using one formula due to process limitation, the tread formula like radial tires and bias tires can not give consideration to the abrasion and wet land gripping capability, and the bead formula gives consideration to heat generation and buckling fatigue, so that the tire abrasion and heat generation are relatively high.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a tire, a manufacturing method thereof, and a vehicle, which are intended to improve the abrasion resistance and the heat generation resistance of the tire.
An embodiment of a first aspect of the present invention provides a tire comprising: the tire comprises a tire tread and two tire beads, wherein the two tire beads are respectively connected with the tire tread at two edges of the tire tread, the tire tread and the tire beads are made of different materials and are integrally formed, the tire tread is made of a material with higher ground gripping performance and wear resistance than the tire beads, and the tire beads are made of a material with higher bending resistance and weather resistance than the tire tread.
In the embodiment provided by the invention, compared with the tire tread, the material used for the tire bead has more excellent low-heat and deflection resistance, and meanwhile, the tire bead has better elasticity and elongation, the compression permanent deformation change is larger, and the comfort is improved; compared with the tire bead, the tire tread uses materials with better abrasion resistance, superior ground gripping performance, higher stress at definite elongation and hardness, relatively lower elasticity and elongation and smaller compression permanent deformation change, thereby leading the tire to have better abrasion resistance and heat generation resistance.
In some embodiments, the tread and the bead both contain carbon black in their formulations, and the tread has a carbon black specific surface area that is higher than the bead carbon black specific surface area.
In some embodiments, the carbon black particle size of the tread is less than the carbon black particle size of the bead.
In some embodiments, the tread employs 53phr to 63phr of N-550, and the bead employs 53phr to 63phr of N-234.
In some embodiments, the tread and the bead both contain hydrated silica in the formulation, and the hydrated silica of the tread has a higher specific surface area than the bead.
In some embodiments, the tread utilizes 7000GR of aqueous silica and the beads utilize 233GR of aqueous silica.
In some embodiments, the tread and the bead are formulated to include an antioxidant, and the tread has an antioxidant content greater than an antioxidant content of the bead.
In some embodiments, the anti-aging agents in the tread and bead formulations include: antioxidant 6PPD, antioxidant RD, antioxidant OK 2122H; the content of the antioxidant 6PPD of the tire tread is equal to that of the antioxidant 6PPD of the tire bead, and the content of the antioxidant OK2122H of the tire tread is equal to that of the antioxidant OK2122H of the tire bead; the content of the antioxidant 6PPD of the tire tread is 1.14phr to 1.64phr, the content of the antioxidant OK2122H is 1.5phr to 2.5phr, the content of the antioxidant RD of the tire tread is 0.5phr to 1.5phr, and the content of the antioxidant RD of the tire bead is 1.5phr to 2.5 phr.
In some embodiments, the tread and the tire bead are prepared by natural rubber, vulcanized rubber and styrene butadiene rubber, active agent ZNO, active agent SA, vulcanizing agent S (95%), accelerator CBS and accelerator DPG, and the content of each component of the tread is the same as that of the corresponding component of the tire bead.
In some embodiments, in the tread and in the tread band, the natural rubber is present in an amount of 25phr to 35phr, the vulcanized rubber is present in an amount equal to that of the natural rubber, the styrene-butadiene rubber is present in an amount of 35phr to 45phr, the active agent ZNO is present in an amount of 1.5phr to 2.5phr, the active agent SA is present in an amount equal to that of the active agent ZNO, the vulcanizing agent S (95%) is present in an amount of 1.5phr to 2.5phr, the accelerator CBS is present in an amount of 0.7phr to 1.7phr, and the accelerator DPG is present in an amount of 0.25phr to 0.75 phr.
In some embodiments, the tread is extruded and the beads are integrally cured with the tread.
A second aspect of the invention proposes a method of manufacturing a tyre as defined in any one of the preceding claims, comprising:
cutting and attaching the sheet into a ring-shaped structure;
placing the annular structure into a mold;
and injecting rubber material into the mold, so that the rubber material and the annular structure are integrally vulcanized and molded, the rubber material forms a tire bead of the tire, and the annular structure forms a tire tread of the tire.
An embodiment of a third aspect of the invention provides a mould for manufacturing a tyre as claimed in any one of the preceding claims, the mould comprising: the tire tread sizing machine comprises a lower die, a middle die and an upper die, wherein the lower die is provided with an annular groove for sizing tire bead sizing material on one side, the middle die is provided with a middle through hole for containing tire tread sizing material, the middle through hole is communicated with the groove, and the upper die is provided with an annular groove for sizing tire bead sizing material on the other side.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flow chart of a method of making a tire provided by the present invention.
FIG. 2 is a schematic structural view of a mold provided by the present invention;
fig. 3 is a structural exploded view of the mold provided by the present invention.
Drawings
Die 10, upper die 11, middle die 12, lower die 13 and sheet 20
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
An embodiment of a first aspect of the present invention provides a tire comprising: the tire tread comprises a tire tread and two tire beads, wherein the two tire beads are respectively connected with the tire tread at two edges of the tire tread, the tire tread and the tire beads are made of different materials and are integrally formed, the tire tread is made of a material with higher ground gripping performance and wear resistance than the tire beads, and the tire beads are made of a material with higher bending resistance and weather resistance than the tire tread.
In the embodiment provided by the invention, the material used for the tire bead has more excellent low-heating and deflection-resistant performances, and meanwhile, the tire bead has better elasticity and elongation, the compression permanent deformation change is larger, and the comfort is improved; the material used for the tread has better abrasion resistance, excellent ground gripping performance, higher stress at definite elongation and hardness, relatively lower elasticity and elongation and smaller compression permanent deformation change, thereby leading the tire to have better abrasion resistance and heat resistance. Therefore, the tread is made of a material with better abrasion resistance because the tread is in friction contact with the ground frequently, and the beads are deformed obviously relatively, so that the beads are made of a material with better elasticity and elongation. Meanwhile, the tire made of different material components has the advantages of abrasion resistance, elasticity and flexing resistance, and has longer service life.
In some specific embodiments, the tread and the bead are formulated with carbon black, and the tread has a carbon black specific surface area that is greater than the carbon black specific surface area of the bead. Specifically, the carbon black particle diameter of the tread is smaller than that of the tire bead. Preferably, 53phr to 63phr of carbon black N-550 is used for the tread to improve the abrasion resistance, hardness and gripping performance of the tread. Preferably, the bead employs from 53phr to 63phr of carbon black N-234. This allows the tread and beads to have better wear resistance.
Phr refers to parts added per hundred to the rubber (or resin) (parts per hundred rubber content per hundred of rubber).
Further, the amount of N-550 in the tread may be 58phr, and the amount of N-234 in the bead may be 58 phr.
In some specific embodiments, the tread and the bead both contain hydrated silica in the formulation, and the hydrated silica of the tread has a higher specific surface area than the specific surface area of the bead. Thus, a certain content of hydrous silicon dioxide is arranged in the tire tread and the tire bead, so that the tire tread and the tire bead have better abrasion resistance and heat-generating resistance. Preferably, 7000GR of hydrated silica is used for the tread and 233GR of hydrated silica is used for the beads. Wherein 7000GR has a larger specific surface area than 233GR, thereby providing the tread with more excellent abrasion resistance and heat generation resistance than the beads.
In some specific embodiments, the tread and the bead are formulated to include an antioxidant, and the tread has an antioxidant content greater than the antioxidant content of the bead. The antioxidant capacity of the tread is better than that of the tire bead because the content of the antioxidant in the tire tread is larger than that in the tire bead.
In some specific embodiments, the anti-aging agents in the tread and bead formulations include: antioxidant 6PPD, antioxidant RD, antioxidant OK 2122H; the content of the antioxidant 6PPD in the tread is equal to that of the antioxidant 6PPD in the tire bead, and the content of the antioxidant OK2122H in the tread is equal to that of the antioxidant OK2122H in the tire bead. Optionally, the content of the antioxidant 6PPD of the tread is 1.14phr to 1.64phr, and the content of the antioxidant OK2122H is 1.5phr to 2.5phr respectively; the content of the antioxidant RD of the tire tread is 0.5phr to 1.5phr, and the content of the antioxidant RD of the tire bead is 1.5phr to 2.5 phr. The tire tread and the tire bead have good oxidation resistance by mixing various anti-aging agents into the tire tread and the tire bead, and the content of the anti-aging agent RD in the tire bead is larger than that of the anti-aging agent RD in the tire bead, so that the tire bead has better weather resistance.
Preferably, the contents of the tread and the bead internal antioxidant 6PPD are both 1.39phr, the contents of the tread and the bead internal antioxidant OK2122H are both 2phr, the antioxidant RD content of the tread is 1phr, and the antioxidant RD content of the bead is 2 phr.
In some specific embodiments, the tread and the tire bead are also respectively composed of natural rubber, vulcanized rubber and styrene butadiene rubber, active agent ZNO, active agent SA, vulcanizing agent S (95%), accelerator CBS and accelerator DPG, and the content of each component of the tread is the same as that of the corresponding component of the tire bead. The rubber, the activator, the vulcanizing agent and the accelerator in the tread are the same as those in the tire bead, so that the rubber can be conveniently prepared by mixing the tread and the tire bead.
In some specific examples, in the tread and in the tread band, the natural rubber content is between 25phr and 35phr, the vulcanized rubber content is the same as that of the natural rubber, the styrene-butadiene rubber content is between 35phr and 45phr, the active agent ZNO content is between 1.5phr and 2.5phr, the active agent SA content is the same as that of the active agent ZNO, the vulcanizing agent S (95%) content is between 1.5phr and 2.5phr, the accelerator CBS content is between 0.7phr and 1.7phr, and the accelerator DPG content is between 0.25phr and 0.75 phr. The contents of the components in the tread and the tire bead are the same, so that the tread and the tire bead have better elasticity, the mixture has the good mechanical strength and the deformation capability of natural rubber and also has the wear resistance and the traction performance of styrene butadiene rubber, and the performance of the natural rubber which is not ageing-resistant is neutralized, so that the performance of the mixture is improved.
Preferably, the content of the natural rubber is 30phr, the content of the vulcanized rubber is 30phr, the content of the styrene-butadiene rubber is 40phr, the content of the active agent ZNO is 2phr, the content of the active agent SA is 2phr, the content of the vulcanizing agent S (95%) is 2phr, the content of the accelerator CBS is 1.2phr, and the content of the accelerator DPG is 0.5 phr.
In particular embodiments, the tread is formed by an extrusion process, and the beads are integrally cured with the tread. Thus, the production steps can be saved, the production flow can be simplified, and the structural strength between the tire bead and the tire tread can be improved, so that the structural strength of the tire is improved.
A second embodiment of the invention, as shown in fig. 1, proposes a method of manufacturing a tyre as defined in any one of the preceding claims, comprising the following steps:
s1, cutting and attaching the sheet material 20 into a ring-shaped structure;
s2, placing the annular structure into the mould 10;
s3, injecting rubber material into the mold 10, so that the rubber material and the annular structure are integrally vulcanized and molded, and the rubber material forms the tire bead of the tire and the annular structure forms the tire tread of the tire.
The tire manufactured by the manufacturing method of the tire has better structural strength, so that the tire has better service life, and moreover, the manufacturing method of the tire can facilitate the manufacturing of the tire when the tire is manufactured, accelerate the production of the tire, simplify the production flow and improve the working efficiency.
In some specific embodiments, in the primary mixing process, the raw rubber, the reinforcing agent, the anti-aging agent, the activator and the accelerator are subjected to primary mixing in batches according to a proportion, and the primary mixing temperature is preferably 145-155 ℃. And adding a vulcanizing agent after the primary mixing is finished, and performing final mixing, wherein the final mixing temperature is preferably 90-110 ℃. Cutting the mixture after the final mixing into small strips (namely, sheets 20), vulcanizing the small strips and the tire bead rubber together in a mold 10, preferably vulcanizing at 160-190 ℃, wherein the vulcanizing time is 3.5 minutes, and removing peripheral rough edges after the vulcanizing is finished.
The required tire specification is developed through a metal opening, the tire is automatically attached to be circular through a machine after being cut, a middle mold 12 and a lower mold 13 of a mold 10 are pressed, the attached rubber sheet is placed on the outermost side of the mold 10, tire bead rubber materials and the mold 10 are extruded and attached, an upper mold 11 is closed, redundant tire bead rubber materials can escape from the mold 10, the formed tire is taken out and vulcanized, and the available tire is obtained after the manufactured tire is qualified in appearance detection.
In the embodiment shown in fig. 2 and 3, a third aspect embodiment of the invention proposes a mold 10 for manufacturing a tyre according to any one of the preceding claims, the mold 10 comprising: the tyre bead sizing machine comprises a lower die 13, a middle die 12 and an upper die 11, wherein the lower die 13 is provided with an annular groove for shaping tyre bead sizing materials on one side, the middle die 12 is provided with a middle through hole for accommodating a tyre tread, the upper die 11 is provided with an annular groove for shaping tyre bead sizing materials on the other side, and the middle through hole on the middle die 12 is respectively communicated with the upper groove on the lower die 13 and the upper groove on the upper die 11.
Therefore, when the tire mold 10 is used for manufacturing a tire, the production efficiency of the tire can be remarkably increased, and the tire manufactured by using the mold 10 has relatively high structural strength and long service life.
Therefore, the raw rubber composed of the natural rubber and the styrene-butadiene rubber is used, so that the raw rubber has the good mechanical strength and the deformation capability of the natural rubber, meanwhile, the wear resistance and the traction performance of the styrene-butadiene rubber, and the performance of the natural rubber which is not ageing-resistant is neutralized, thereby improving the performance of the raw rubber.
The formula of the bead and tread of a tire according to one embodiment of the present invention is shown in table one;
watch 1
Referring to table 1, a formula of a tread and a bead of a tire according to a specific embodiment is shown, and the prepared tire has good abrasion resistance, heat resistance, bending resistance and weather resistance by proportioning according to the formula. Specifically, when the mixture is mixed, adding the hydrous silicon dioxide with different specific surface areas, the carbon black with different carbon black diameters and the anti-aging agent RD with different dosages, and distinguishing the mixed rubber materials, so that the rubber materials with different properties can enter different positions of a subsequent process to form a tire bead or a tire tread, and specifically, in the process of manufacturing the tire tread rubber material, adding 7000GR with larger specific surface area, N-550 with larger carbon black diameter and more anti-aging agent RD when the mixture is mixed, so that the formed rubber material has better abrasion resistance, better stress at definite elongation and better hardness for manufacturing the tire tread; during the process of preparing the tire bead rubber compound, 233GR with a small specific surface area, N-234 with a small carbon black diameter and less antioxidant RD are added during mixing of the mixture, so that the formed rubber compound has better elasticity and elongation to facilitate the manufacture of the tire bead.
Meanwhile, the content of the rubber material for manufacturing the tire tread is relatively similar to that of the rubber material for manufacturing the tire bead, and the internal components are basically the same, so that the manufactured tire generally has better oxidation resistance, abrasion resistance and weather resistance, and the vulcanization effect of the rubber material is the same when the subsequent vulcanization is carried out, thereby facilitating the production of the tire by a user.
The constitution of the processing aids according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (13)
1. A tire, comprising:
a tread; and
the tire tread comprises two tire beads, wherein the two tire beads are respectively connected with the tire tread at two edges of the tire tread, the tire tread and the tire beads are made of different materials and are integrally formed, the tire tread is made of a material with higher ground gripping performance and wear resistance than the tire beads, and the tire beads are made of a material with higher bending resistance and weather resistance than the tire tread.
2. The tire of claim 1, wherein the tread and the bead each contain carbon black in the formulation, and the tread has a carbon black specific surface area that is higher than a carbon black specific surface area of the bead.
3. The tire of claim 2, wherein the tread has a carbon black particle size that is less than a carbon black particle size of the bead.
4. The tire of claim 3, wherein the tread comprises 53phr to 63phr of N-550, and the bead comprises 53phr to 63phr of N-234.
5. The tire according to claim 1, wherein the tread and the bead each contain hydrated silica in the formulation, and the hydrated silica of the tread has a specific surface area higher than the specific surface area of the hydrated silica of the bead.
6. The tire of claim 5, wherein the tread comprises 7000GR of hydrated silica and the beads comprise 233GR of hydrated silica.
7. The tire of claim 1 wherein said tread and said bead each comprise an antioxidant, and wherein said tread has an antioxidant content greater than the antioxidant content of said bead.
8. The tire of claim 7, wherein the anti-aging agents in the formulation of the tread and the bead comprise: antioxidant 6PPD, antioxidant RD, antioxidant OK 2122H;
the content of the antioxidant 6PPD of the tire tread is equal to that of the antioxidant 6PPD of the tire bead, and the content of the antioxidant OK2122H of the tire tread is equal to that of the antioxidant OK2122H of the tire bead;
the content of the antioxidant 6PPD of the tire tread is 1.14phr to 1.64phr, the content of the antioxidant OK2122H is 1.5phr to 2.5phr, the content of the antioxidant RD of the tire tread is 0.5phr to 1.5phr, and the content of the antioxidant RD of the tire bead is 1.5phr to 2.5 phr.
9. Tyre according to any one of claims 2 to 8, characterized in that the tread, the beads, are also formulated with natural rubber, vulcanized rubber, styrene-butadiene rubber, active agent ZNO, active agent SA, vulcanizing agent S (95%), accelerator CBS, accelerator DPG, each of the above components being present in the same amount as the corresponding component of the bead.
10. A tyre according to claim 9, characterized in that, in said tread as well as in the beads,
the content of the natural rubber is 25phr to 35phr, the content of the vulcanized rubber is the same as that of the natural rubber, and the content of the styrene-butadiene rubber is 35phr to 45 phr;
the content of the active agent ZNO is 1.5phr-2.5phr, and the content of the active agent SA is the same as that of the active agent ZNO;
the content of the vulcanizing agent S (95%) is 1.5phr to 2.5phr, the content of the accelerator CBS is 0.7phr to 1.7phr, and the content of the accelerator DPG is 0.25phr to 0.75 phr.
11. The tire of claim 1, wherein the tread is extruded and the beads are integrally cured with the tread.
12. A method of manufacturing a tyre as claimed in any one of claims 1 to 11, comprising:
cutting and attaching the sheet into a ring-shaped structure;
placing the annular structure into a mold;
and injecting rubber material into the mold, so that the rubber material and the annular structure are integrally vulcanized and molded, the rubber material forms a tire bead of the tire, and the annular structure forms a tire tread of the tire.
13. A mold for manufacturing a tyre according to any one of claims 1 to 11, characterized in that it comprises:
the lower die is provided with an annular groove for shaping the bead rubber material on one side;
the middle die is provided with a middle through hole for containing tread rubber, and the middle through hole is communicated with the groove;
and the upper die is provided with an annular groove for shaping the bead rubber material on the other side.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010261020.XA CN113492624A (en) | 2020-04-03 | 2020-04-03 | Tire, tire manufacturing method, and tire mold |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010261020.XA CN113492624A (en) | 2020-04-03 | 2020-04-03 | Tire, tire manufacturing method, and tire mold |
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| CN113492624A true CN113492624A (en) | 2021-10-12 |
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| CN202010261020.XA Pending CN113492624A (en) | 2020-04-03 | 2020-04-03 | Tire, tire manufacturing method, and tire mold |
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