CN114434698A - Rational vulcanization method of tire - Google Patents
Rational vulcanization method of tire Download PDFInfo
- Publication number
- CN114434698A CN114434698A CN202111508522.9A CN202111508522A CN114434698A CN 114434698 A CN114434698 A CN 114434698A CN 202111508522 A CN202111508522 A CN 202111508522A CN 114434698 A CN114434698 A CN 114434698A
- Authority
- CN
- China
- Prior art keywords
- vulcanization
- tire
- time
- temperature
- vulcanization time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004073 vulcanization Methods 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000002474 experimental method Methods 0.000 claims abstract description 12
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 9
- 238000012795 verification Methods 0.000 claims abstract description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 8
- 239000005060 rubber Substances 0.000 claims description 7
- 229910052717 sulfur Inorganic materials 0.000 claims description 7
- 239000011593 sulfur Substances 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004636 vulcanized rubber Substances 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010057 rubber processing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000035924 thermogenesis Effects 0.000 description 1
- 238000004861 thermometry Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
-
- 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
- B29D30/0662—Accessories, details or auxiliary operations
-
- 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
- B29D30/0662—Accessories, details or auxiliary operations
- B29D2030/0665—Measuring, calculating and correcting tyre uniformity before vulcanization
-
- 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
- B29D30/0662—Accessories, details or auxiliary operations
- B29D2030/0675—Controlling the vulcanization processes
- B29D2030/0677—Controlling temperature differences
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention provides a rationality vulcanization method of a tire, comprising the following steps: s10, establishing a primary vulcanization condition according to the vulcanization principle and the vulcanization elements; s20, optimizing the vulcanization conditions in the step S10 through temperature measurement experiments on different parts of the tire; s30, verifying the vulcanization condition optimized in the step S20 through a bubble experiment; and S40, determining the final vulcanization condition of the tire according to the verification result of the step S30. The invention provides a reasonable vulcanization method of a tire, which has good vulcanization effect, short vulcanization time and greatly reduced vulcanization cost.
Description
Technical Field
The invention relates to the technical field of automobile tire preparation, in particular to a reasonable vulcanization method of a tire.
Background
The tire industry is one of the major corollary industries of the automotive industry, and is a capital-intensive, technology-intensive, and labor-intensive industry. Tires are of various types and have wide application fields, and can be classified into car tires, passenger car tires, heavy duty tires, agricultural tires, engineering tires, special vehicle tires, aircraft tires, motorcycle tires, bicycle tires and the like according to purposes.
In the production process of the conventional automobile tire, the vulcanization effect of the tire is poor, the operation stability and the running safety of the automobile are affected, the vulcanization time is long, and the vulcanization cost is high.
Disclosure of Invention
The invention aims to provide a rational vulcanization method of a tire to solve the problems.
In order to achieve the purpose, the invention provides the following technical scheme: a rationalised vulcanisation method of tyres comprising the steps of:
s10, establishing a primary vulcanization condition according to the vulcanization principle and the vulcanization elements;
s20, optimizing the vulcanization conditions in the step S10 through temperature measurement experiments on different parts of the tire;
s30, verifying the vulcanization condition optimized in the step S20 through a bubble experiment;
and S40, determining the final vulcanization condition of the tire according to the verification result of the step S30.
As a modification of the present invention, in step S10, the preliminary vulcanization conditions include the amount of sulfur, the vulcanization temperature, and the vulcanization time.
As an improvement of the invention, in the tire product, the sulfur content accounts for 1.5-2.5% of the total tire material.
As an improvement of the invention, during the vulcanization process, the vulcanization temperature is gradually increased and kept low for a long time.
As a modification of the present invention, in step S20, the optimum vulcanization condition is a vulcanization time.
As an improvement of the invention, a thermocouple is adopted to carry out temperature measurement experiment for determining the vulcanization time;
the copper wires of the thermocouple are respectively embedded into corresponding temperature measuring parts in the tire molding process,
cutting the vulcanized tire at a temperature measuring point, and adopting and recording the measurement data of the thermocouple and the corresponding actual thickness of the tire part;
calculating the equivalent vulcanization time according to the formula (1),
Tp＝Ts+k(Ga-Gt) Formula (1)
Wherein, TpEquivalent vulcanization time of the tire before mold opening, TsIs the equivalent vulcanization time of the semi-finished rubber compound at a reference temperature, k is the coefficient existing due to the thickness of the tire and the fluctuation of the internal and external temperatures, GaTheoretical thickness of the finished tire, GtThe actual thickness of the finished tire.
As a modification of the present invention, the vulcanization time is verified by the patch verification method in step S40,
at the vulcanization time determined in step S20, a plurality of films of different thicknesses are added to the outermost layer of the green tire after the tire is built, and then vulcanization is performed with a small reduction in vulcanization time,
the tire after completion of vulcanization is cut, and the vulcanization result is analyzed to determine whether or not air bubbles are generated, and if no air bubbles are generated, the vulcanization time set in step S20 is reasonable.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
A method of rationalised vulcanisation of tyres, comprising the following steps:
s10, establishing a primary vulcanization condition according to the vulcanization principle and the vulcanization elements;
s20, optimizing the vulcanization conditions in the step S10 through temperature measurement experiments on different parts of the tire;
s30, verifying the vulcanization condition optimized in the step S20 through a bubble experiment;
and S40, determining the final vulcanization condition of the tire according to the verification result of the step S30.
As an embodiment of the present invention, in step S10, the preliminary vulcanization conditions include the amount of sulfur, the vulcanization temperature, and the vulcanization time.
As an example of the invention, the sulphur content in the tyre product is between 1.5% and 2.5% of the total tyre material.
As an embodiment of the invention, during the vulcanization process, the vulcanization temperature is gradually increased and kept low for a long time.
As an embodiment of the present invention, in step S20, the optimized vulcanization condition is a vulcanization time.
As an embodiment of the invention, the determination of the vulcanization time adopts a thermocouple to carry out temperature measurement experiment;
the copper wires of the thermocouple are respectively embedded into corresponding temperature measuring parts in the tire molding process,
cutting the vulcanized tire at a temperature measuring point, and adopting and recording the measurement data of the thermocouple and the corresponding actual thickness of the tire part;
calculating the equivalent vulcanization time according to the formula (1),
Tp＝Ts+k(Ga-Gt) Formula (1)
Wherein, TpEquivalent vulcanization time of the tire before mold opening, TsIs the equivalent vulcanization time of the semi-finished rubber compound at a reference temperature, k is the coefficient existing due to the thickness of the tire and the fluctuation of the internal and external temperatures, GaTheoretical thickness of the finished tire, GtThe actual thickness of the finished tire.
As an embodiment of the present invention, the vulcanization time is verified using the patch verification method in step S40,
at the vulcanization time determined in step S20, a plurality of films of different thicknesses are added to the outermost layer of the green tire after the tire is built, and then vulcanization is performed with a small reduction in vulcanization time,
the tire after completion of vulcanization is cut, and the vulcanization result is analyzed to determine whether or not air bubbles are generated, and if no air bubbles are generated, the vulcanization time set in step S20 is reasonable.
The working principle and the beneficial effects of the technical scheme are as follows:
vulcanization is an important chemical reaction process in the rubber processing process, and the vulcanized rubber structure has chemical cross-linking bonds, crystal regions, combinations formed by intermolecular forces such as hydrogen bonds and the like, and also has chemical bonds such as ionic bond cross-linking, and the vulcanized rubber structures associated in the forms form a three-dimensional network.
In the production of tyres, vulcanization has the significance of transforming a tyre from a green tyre which is only plastic to a tyre which is elastic under certain vulcanization conditions. The tire is made of rubber, fiber, steel and a compound of the rubber, the fiber and the steel, so that the vulcanization of the tire becomes an unstable heat transfer process, the thermal boundary is very single, and different change distributions of temperature changes among rubber materials of different parts at the same time exist in the tire. The main factors influencing the vulcanization process of the rubber are the sulfur dosage, the vulcanization temperature and the vulcanization time.
For time determination of cure time, the thermocouple is a temperature sensor that generates a voltage when linked together by 2 different metal wires. Because in the tire vulcanization process, the temperature of interior point is unknown, vulcanizes the temperature measurement through the thermocouple, then can detect out specific definite thermogenesis speed, and the vulcanization time of the tire of rational utilization experimental data can shorten some specifications not only can improve the quality of tire, has also improved work efficiency and economic benefits. Therefore, the vulcanization thermocouple thermometry is a feasible and practical method for calculating the optimum vulcanization conditions for the tire. And cutting the vulcanized thermocouple tire at the position of a temperature measuring point, checking whether the thermocouple wire embedded in the molding stage before meets the requirements, and if not, making the measurement result unavailable. The temperature measurement result can be taken, and measurement records and actual thickness of each part are required to facilitate calculation.
Adding films with different thicknesses on the outermost layer of the green tire after the molding is finished, reducing the curing time (3-5min) for curing the green tire added with the films with different thicknesses, cutting the section of the tire after the curing is finished, and observing and analyzing the bubble phenomenon at the section. If no bubble is generated, the vulcanization time obtained according to the thermocouple experiment has no risk of sulfur shortage.
The invention provides a reasonable vulcanization method of a tire, which has good vulcanization effect, short vulcanization time and greatly reduced vulcanization cost.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. A method of rationalised vulcanisation of tyres, characterised in that it comprises the following steps:
s10, establishing a primary vulcanization condition according to the vulcanization principle and the vulcanization elements;
s20, optimizing the vulcanization conditions in the step S10 through temperature measurement experiments on different parts of the tire;
s30, verifying the vulcanization condition optimized in the step S20 through a bubble experiment;
and S40, determining the final vulcanization condition of the tire according to the verification result of the step S30.
2. A rationalised vulcanisation method for tyres according to claim 1, characterised in that: in step S10, the preliminary vulcanization conditions include sulfur amount, vulcanization temperature, and vulcanization time.
3. A rational vulcanization method of a tire according to claim 2, characterized by: in the tire product, the sulfur content accounts for 1.5-2.5% of the total tire material.
4. A rationalized vulcanisation method of tyres according to claim 2, characterised in that: in the vulcanization process, the vulcanization temperature is gradually increased and kept low for a long time.
5. A rationalised vulcanisation method for tyres according to claim 1, characterised in that: in step S20, the optimized vulcanization condition is a vulcanization time.
6. A rationalised vulcanisation method for tyres according to claim 5, characterised in that: a thermocouple is adopted for temperature measurement experiment for determining the vulcanization time;
the copper wires of the thermocouple are respectively embedded into corresponding temperature measuring parts in the tire molding process,
cutting the vulcanized tire at a temperature measuring point, and adopting and recording the measurement data of the thermocouple and the corresponding actual thickness of the tire part;
calculating the equivalent vulcanization time according to the formula (1),
Tp＝Ts+k(Ga-Gt) Formula (1)
Wherein, TpEquivalent vulcanization time of the tire before mold opening, TsIs the equivalent vulcanization time of the semi-finished rubber compound at a reference temperature, k is the coefficient existing due to the thickness of the tire and the fluctuation of the internal and external temperatures, GaTheoretical thickness of the finished tire, GtThe actual thickness of the finished tire.
7. A rationalised vulcanisation method for tyres according to claim 1, characterised in that: the vulcanization time is verified in step S40 using a patch verification method,
at the vulcanization time determined in step S20, a plurality of films of different thicknesses are added to the outermost layer of the green tire after the tire is built, and then vulcanization is performed with a small reduction in vulcanization time,
the tire after completion of vulcanization is cut, and the vulcanization result is analyzed to determine whether or not air bubbles are generated, and if no air bubbles are generated, the vulcanization time set in step S20 is reasonable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111508522.9A CN114434698A (en) | 2021-12-10 | 2021-12-10 | Rational vulcanization method of tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111508522.9A CN114434698A (en) | 2021-12-10 | 2021-12-10 | Rational vulcanization method of tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114434698A true CN114434698A (en) | 2022-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111508522.9A Pending CN114434698A (en) | 2021-12-10 | 2021-12-10 | Rational vulcanization method of tire |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1280909A (en) * | 1999-07-14 | 2001-01-24 | 倍耐力轮胎公司 | Method of vulcanizing tyre using predetermined degree of vulcanization |
| CN106273113A (en) * | 2016-08-24 | 2017-01-04 | 四川远星橡胶有限责任公司 | A kind of Temperature Measurement of Tire during Vulcanization method |
| CN110364228A (en) * | 2019-06-24 | 2019-10-22 | 安徽佳通乘用子午线轮胎有限公司 | A kind of tyre stock formula vulcanizing system design method and system |
-
2021
- 2021-12-10 CN CN202111508522.9A patent/CN114434698A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1280909A (en) * | 1999-07-14 | 2001-01-24 | 倍耐力轮胎公司 | Method of vulcanizing tyre using predetermined degree of vulcanization |
| CN106273113A (en) * | 2016-08-24 | 2017-01-04 | 四川远星橡胶有限责任公司 | A kind of Temperature Measurement of Tire during Vulcanization method |
| CN110364228A (en) * | 2019-06-24 | 2019-10-22 | 安徽佳通乘用子午线轮胎有限公司 | A kind of tyre stock formula vulcanizing system design method and system |
Non-Patent Citations (3)
| Title |
|---|
| 林春玲 等: "杜仲胶/天然橡胶/顺丁橡胶并用胶的工艺研究", 《中国胶粘剂》 * |
| 梁亚平 等: "轮胎硫化测温及硫化条件的制定", 《轮胎工业》 * |
| 赵菲 等: "轮胎硫化时间的优化", 《特种橡胶制品》 * |
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Application publication date: 20220506 |
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