CN112708180B - Tire and preparation process thereof - Google Patents
Tire and preparation process thereof Download PDFInfo
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- CN112708180B CN112708180B CN202011534720.8A CN202011534720A CN112708180B CN 112708180 B CN112708180 B CN 112708180B CN 202011534720 A CN202011534720 A CN 202011534720A CN 112708180 B CN112708180 B CN 112708180B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L17/00—Compositions of reclaimed rubber
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- 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)
- B29D30/08—Building tyres
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- 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
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
The invention discloses a tire and a preparation process thereof, wherein the tire is prepared from the following components in parts by weight: 3-5 parts of high benzene rubber; 48-52 parts of reclaimed rubber; 28-32 parts of rubber powder; 3-5 parts of aromatic oil; 0.5-0.8 part of sulfur; 0.3-0.6 part of rubber accelerator CZ; 0.1-0.3 part of rubber accelerator TMTD; 0.4-0.7 part of stearic acid; 0.5-0.9 part of zinc oxide. The preparation process comprises the steps of cold forming, fitting, inflating, heating, fusing and vulcanizing into a whole. The preparation process shortens the production flow and improves the production efficiency. The prepared tire has a wireless steel wire-free structure, can be normally used under load, has a service life prolonged by 3-5 years, and does not need an inner tube.
Description
Technical Field
The invention relates to the technical field of tires, in particular to a tire and a preparation process thereof.
Background
The tire is a common article in the life at present, and various vehicles, equipment and agricultural machinery are widely produced in China along with the improvement of the living standard of people at present. The production and consumption of tires as important components are particularly enormous. In particular, the waste tires are recycled, the production process is complicated, the labor and personnel investment is large, the equipment investment is large, the power consumption is large, the specific gravity and the index are low in the old formula, the addition of calcium powder into dust is large, the performance index of the product is reduced, the service life of the tires is short, the product qualification rate is low due to the complicated production process and personnel management, and the tire cost is increased.
For example, the original low-speed tires of the cycle tires mostly adopt waste tires which are ground and desulfurized to form reclaimed rubber as main raw materials.
The original formula of the tyre of the bicycle is as follows: 60 kg of reclaimed rubber, 25 kg of calcium carbonate powder, 4 kg of aromatic oil, 600 g of sulfur, 280 g of rubber accelerator CZ, 200 g of rubber accelerator DM, 600 g of stearic acid, 700 g of zinc oxide, 200 g of rubber antioxidant RD and 4010 g of rubber antioxidant. Wherein the chemical name of the rubber accelerator DM is 2, 2' -dithiodibenzothiazole.
The production process flow of the original cart tire comprises the following steps:
1. mixing rubber, adding reclaimed rubber, mixing oil and calcium powder, pressurizing, heating to 100 ℃, fusing and mixing for 6-8 minutes, thinning, cooling and cooling by using an open mill to obtain rubber sheets;
2. putting the rubber sheet into an open mill, rolling, heating to 90 ℃, putting the rubber sheet into a tread extruder, and cutting the rubber sheet into a tread according to the circumference of a width thickness curve of the tire;
3. extruding and molding a steel wire, namely extruding and gluing the steel wire according to the diameter size of the rim and winding the steel wire together to form a fixed-size ring;
4. the fabric cutting of the cord thread by coating the rubber is to pave the cord thread, tension the cord thread, enter a four-roller calender, preheat, roll and raise the temperature to 90 ℃ by an open mill, and then roll down and put into the calender; uniformly coating the glue on the cord with the thickness of 0.6-1.2mm, cooling, feeding the cord into an isolation laying cloth, rolling, and cutting the cord into required length, width and angle according to the type requirement of the tire by cutting the cloth;
5. forming, namely winding the cut cloth on a forming machine head in a crossed manner, hanging a steel wire ring at two ends, wrapping the steel wire ring by the reverse edges of the two layers of cloth, tensioning, then bonding the tire tread on the cloth by a 360-degree joint, pressing the tire tread on a pressing head, and rolling to form a fixed embryo;
6. vulcanizing, namely expanding and jacking the tire blank by using a blank filling machine; forming the radian required by tire vulcanization, filling the water tire used for molding into a tire blank, putting the tire blank into a high-temperature vulcanizing machine, vulcanizing at the high temperature of 150 ℃, filling high-pressure gas into the water tire to expand, pressing the mold into a tire with patterns, wherein the vulcanizing time is generally 10-60 minutes, hooking the water tire after the vulcanization is finished, molding the tire, and warehousing, selling and using after the tire is qualified through inspection.
The tire needs steel wire cords to form a framework to bear pressure, so that the normal use and running of the tire can be ensured. The steel wire has poor structural performance, needs complicated production process of wire layer steel wires to meet normal production and normal use, needs a large amount of labor force investment, has huge manufacturing cost and lower productivity.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a tire and a preparation process thereof. The tire has a wireless steel wire-free structure, and the preparation process shortens the production flow and improves the production efficiency.
The adopted technical scheme is as follows:
the invention relates to a tire which is prepared from the following components in parts by weight:
3-5 parts of high benzene rubber; 48-52 parts of reclaimed rubber; 28-32 parts of rubber powder; 3-5 parts of aromatic oil; 0.5-0.8 part of sulfur; 0.3-0.6 part of rubber accelerator CZ; 0.1-0.3 part of rubber accelerator TMTD; 0.4-0.7 part of stearic acid; 0.5-0.9 part of zinc oxide.
Further, the tire is prepared from the following components in parts by weight:
4 parts of high benzene rubber; 50 parts of reclaimed rubber; 30 parts of 40-mesh rubber powder; 4 parts of aromatic oil; 0.7 part of sulfur; 0.5 part of rubber accelerator CZ; 0.2 part of rubber accelerator TMTD; 0.6 part of stearic acid; 0.8 part of zinc oxide.
In the formula, the high benzene rubber is Styrene Butadiene Rubber (SBR) with styrene (St) content of more than 50 wt%; the rubber powder is a powdery rubber material obtained by crushing and processing waste rubber products; the reclaimed rubber is rubber which is processed by using vulcanized leftover materials in the production of rubber products as raw materials, has certain plasticity and can be reused. Molecular formula C of rubber accelerator CZ 13 H 16 N 2 S 2 The chemical name is N-cyclohexyl-2-benzothiazole sulfonamide; molecular formula C of rubber accelerator TMTD 6 H 12 N 2 S 4 The chemical name is N, N' -tetramethyl dithio-carbonyl amine.
The preparation process of the tire comprises the following steps:
s1, controlling a servo motor through a PLC (programmable logic controller), spirally pushing a screw of the servo motor, and putting required tire formula components into a bin of an internal mixer;
s2, starting the internal mixer, breaking the rubber at a low speed of 10-20 revolutions per minute, fully stirring and mixing the materials at a medium speed of 30-40 revolutions per minute, heating at a high speed of 50-60 revolutions per minute to 80-100 ℃, fusing, and discharging;
s3, transferring the mixture into a double-screw machine, cooling to 50-60 ℃, extruding into pieces, fixing the length, and weighing;
s4, extruding and cooling to 20-30 ℃ by using a hydraulic press, cooling and forming, and extruding a semi-finished product with the required external dimension of the product;
s5, placing the two semi-finished products into an upper die and a lower die, extruding the semi-finished products by a vulcanizing machine, heating the semi-finished products to 150-160 ℃, filling air pressure into the semi-finished products, and vulcanizing and forming the semi-finished products into products.
Further, in S2, the rubber mixing time of the internal mixer is controlled through a PLC, the rotating speed of the internal mixer is controlled through a variable frequency motor system, the internal mixer is started at a low speed of 10-20 r/min for rubber breaking for 60-120S, then at a medium speed of 30-40 r/min, the materials are fully stirred and mixed for 60-120S, and at a high speed of 50-60 r/min, the temperature is raised to 80-100 ℃ for fusion for 60-120S.
Furthermore, in S1, after the materials are automatically weighed and proportioned by an automatic weighing and forming machine, the materials are spirally pushed by a screw rod.
The invention has the beneficial effects that:
by combining the preparation process and the formula, the production efficiency is greatly improved, the performance index of the product is improved, the strength and the hardness of the tire are enhanced, the heavy working strength is reduced, the electric power resource is saved, the production cost is reduced, the production efficiency is improved, and the qualified rate is improved. The prepared tire has a wireless steel wire-free structure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a photographic image of 1 semi-finished product of example 1.
FIG. 2 is a photograph showing 2 semi-finished products of example 1 after being subjected to the step S5 to be molded into a tire.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only preferred embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention discloses a tire, which is prepared from the following components: 4 kg of high benzene rubber, 50 kg of reclaimed rubber, 30 kg of rubber powder of 40 meshes, 4 kg of aromatic oil, 700 g of sulfur, 500 g of rubber accelerator CZ, 200 g of rubber accelerator TMTD, 600 g of stearic acid and 800 g of zinc oxide.
The preparation process of the tire comprises the following steps:
s1, after automatic weighing and batching by an automatic weighing and forming machine, a servo motor is controlled by a PLC (programmable logic controller), a screw of the servo motor is pushed spirally, and required tire formula components are put into a bin of an internal mixer;
s2, rubber mixing time of the internal mixer is controlled through a PLC, the rotating speed of the internal mixer is controlled through a variable frequency motor system, the rotor speed is 10-60 rpm, and the range is adjustable. Starting the internal mixer, breaking rubber at low speed of 10-20 r/min for 60-120S, fully stirring and mixing materials at medium speed of 30-40 r/min for 60-120S, raising temperature at high speed of 50-60 r/min to 80-100 ℃, fusing for 60-120S, and discharging;
s3, transferring the mixture into a double-screw machine, cooling to 50-60 ℃, extruding into pieces, fixing the length, and weighing;
s4, extruding and cooling to 20-30 ℃ by using a hydraulic press, cooling and forming, and extruding a semi-finished product with the required product external dimension;
s5, placing the two semi-finished products into an upper die and a lower die, extruding the semi-finished products by a vulcanizing machine, heating the semi-finished products to 150-160 ℃, filling air pressure into the semi-finished products, and vulcanizing and forming the semi-finished products into products, wherein the products are shown in figures 1-2.
Example 2
Referring to example 1, unlike example 1, a tire of this example was made of the following components:
3 kg of high benzene rubber, 48 kg of reclaimed rubber, 28 kg of 40-mesh rubber powder, 3 kg of aromatic oil, 500 g of sulfur, 300 g of rubber accelerator CZ, 100 g of rubber accelerator TMTD, 400 g of stearic acid and 500 g of zinc oxide.
Example 3
Referring to example 1, unlike example 1, a tire of the present example was made of the following components:
5 kg of high benzene rubber, 52 kg of reclaimed rubber, 32 kg of 40-mesh rubber powder, 5 kg of aromatic oil, 800 g of sulfur, 600 g of rubber accelerator CZ, 300 g of rubber accelerator TMTD, 700 g of stearic acid and 900 g of zinc oxide.
Comparative example 1
A cycle tire made from the following components: 60 kg of reclaimed rubber, 25 kg of calcium carbonate powder, 4 kg of aromatic oil, 600 g of sulfur, 280 g of rubber accelerator CZ, 200 g of rubber accelerator DM, 600 g of stearic acid, 700 g of zinc oxide, 200 g of rubber antioxidant RD and 4010 g of rubber antioxidant.
The preparation process is referred to the background art, and is not described herein.
The tires prepared in example 1 were tested against the tires prepared in comparative example 1, and the test results are shown in table 1 below:
TABLE 1
| Tyre | Comparative example 1 | Example 1 |
| Tensile strength, mpa | 8 | 16 |
| Elongation at break,% | 200 | 260 |
| 300% stress at definite elongation MPa | 5 | 10.5 |
| Hardness (Shore type), A | 56 | 85 |
Comparing the tire prepared in example 1 with the tire prepared for comparative example 1, it can be seen that:
the tire of the present invention: the strength (300% stress at definite elongation) is large, and the tensile strength is doubled. The tensile strength of the tire is multiplied, the hardness is improved, the tire can be normally used under a load without steel wires, the service life is prolonged by 3-5 years, and an inner tube is not needed.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (5)
1. The tire is characterized by being prepared from the following components in parts by weight:
3-5 parts of high benzene rubber; 48-52 parts of reclaimed rubber; 28-32 parts of rubber powder; 3-5 parts of aromatic oil; 0.5-0.8 part of sulfur; 0.3-0.6 part of rubber accelerator CZ; 0.1-0.3 part of rubber accelerator TMTD; 0.4-0.7 part of stearic acid; 0.5-0.9 part of zinc oxide;
the preparation process of the tire comprises the following steps:
s1, controlling a servo motor through a PLC (programmable logic controller), spirally pushing a screw rod of the servo motor, and putting required tire formula components into a bin of an internal mixer;
s2, starting the internal mixer, breaking rubber at a low speed of 10-20 revolutions per minute, fully stirring and mixing materials at a medium speed of 30-40 revolutions per minute, heating at a high speed of 50-60 revolutions per minute to 80-100 ℃, fusing, and discharging;
s3, transferring the mixture into a double-screw machine, cooling to 50-60 ℃, extruding into pieces, fixing the length, and weighing;
s4, extruding and cooling to 20-30 ℃ by using a hydraulic press, cooling and forming, and extruding a semi-finished product with the required external dimension of the product;
s5, placing the two semi-finished products into an upper die and a lower die, extruding the semi-finished products by a vulcanizing machine, heating the semi-finished products to 150-160 ℃, filling air pressure into the semi-finished products, and vulcanizing and forming the semi-finished products into products.
2. The tire according to claim 1, characterized by being made of, in parts by weight:
4 parts of high benzene rubber; 50 parts of reclaimed rubber; 30 parts of 40-mesh rubber powder; 4 parts of aromatic oil; 0.7 part of sulfur; 0.5 part of rubber accelerator CZ; 0.2 part of rubber accelerator TMTD; 0.6 part of stearic acid; 0.8 part of zinc oxide.
3. Process for the preparation of tyres according to claim 1 or 2, comprising the following steps:
s1, controlling a servo motor through a PLC (programmable logic controller), spirally pushing a screw of the servo motor, and putting required tire formula components into a bin of an internal mixer;
s2, starting the internal mixer, breaking the rubber at a low speed of 10-20 revolutions per minute, fully stirring and mixing the materials at a medium speed of 30-40 revolutions per minute, heating at a high speed of 50-60 revolutions per minute to 80-100 ℃, fusing, and discharging;
s3, transferring the mixture into a double-screw machine, cooling to 50-60 ℃, extruding into pieces, fixing the length, and weighing;
s4, extruding and cooling to 20-30 ℃ by using a hydraulic press, cooling and forming, and extruding a semi-finished product with the required external dimension of the product;
s5, placing the two semi-finished products into an upper die and a lower die, extruding the semi-finished products by a vulcanizing machine, heating the semi-finished products to 150-160 ℃, filling air pressure into the semi-finished products, and vulcanizing and forming the semi-finished products into products.
4. The tire manufacturing process according to claim 3, wherein in S2, the rubber mixing time of the internal mixer is controlled by PLC, the rotating speed of the internal mixer is controlled by a variable frequency motor system, the internal mixer is started up at a low speed of 10-20 r/min and is broken for 60-120S, then the materials are fully stirred and mixed for 60-120S at a medium speed of 30-40 r/min, and the temperature is raised to 80-100 ℃ at a high speed of 50-60 r/min for 60-120S.
5. The process for preparing a tire according to claim 3, wherein in S1, the mixture is automatically weighed and dispensed by an automatic weight-measuring molding machine and then is spirally pushed by a screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011534720.8A CN112708180B (en) | 2020-12-23 | 2020-12-23 | Tire and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011534720.8A CN112708180B (en) | 2020-12-23 | 2020-12-23 | Tire and preparation process thereof |
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| CN112708180A CN112708180A (en) | 2021-04-27 |
| CN112708180B true CN112708180B (en) | 2023-01-03 |
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| CN202011534720.8A Active CN112708180B (en) | 2020-12-23 | 2020-12-23 | Tire and preparation process thereof |
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Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1039608A (en) * | 1962-05-11 | 1966-08-17 | Du Pont | Improvements in or relating to pneumatic tyre manufacture |
| EP0224184A1 (en) * | 1985-11-20 | 1987-06-03 | The Uniroyal Goodrich Tire Company | Tire tread composition containing ground coal |
| CN104945819B (en) * | 2015-07-24 | 2018-06-26 | 万力轮胎股份有限公司 | Application and technique for applying of a kind of wet method rubber compound in tire |
| CN105199155A (en) * | 2015-09-22 | 2015-12-30 | 潍坊市跃龙橡胶有限公司 | Low-density polyethylene tire and production technology |
| CN109624365A (en) * | 2017-10-09 | 2019-04-16 | 南京龙贞自控科技发展有限公司 | Tire curing method and vulcanizer |
| CN108164841A (en) * | 2017-12-27 | 2018-06-15 | 明光瑞泰工业有限公司 | A kind of tire curing bladder preparation process |
| CN110128723B (en) * | 2019-05-29 | 2021-06-22 | 浙江通超工贸有限公司 | Rubber for high-bearing solid tire and preparation method thereof |
| CN111363215A (en) * | 2020-01-13 | 2020-07-03 | 沈阳化工大学 | Preparation method of BR/SBR/tread reclaimed rubber/rubber powder combined truck tire pad belt |
| CN111320793A (en) * | 2020-01-13 | 2020-06-23 | 沈阳化工大学 | Preparation method of NR/SBR/tread reclaimed rubber/rubber powder combined truck tire flap |
| CN111363216A (en) * | 2020-01-15 | 2020-07-03 | 沈阳化工大学 | Method for preparing truck tire pad belt by using reclaimed rubber and rubber powder together |
| CN111500051A (en) * | 2020-05-27 | 2020-08-07 | 宁波格林美孚新材料科技有限公司 | TPU micropore foaming particles, preparation method and tire |
| CN111873717A (en) * | 2020-08-05 | 2020-11-03 | 江苏中鸿坦达橡胶科技有限公司 | Integrated vulcanized non-pneumatic rubber tire without steel wires and cord fabric |
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2020
- 2020-12-23 CN CN202011534720.8A patent/CN112708180B/en active Active
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