CN104050365A - Designing method of tire stock vulcanization system - Google Patents
Designing method of tire stock vulcanization system Download PDFInfo
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- CN104050365A CN104050365A CN201410258813.0A CN201410258813A CN104050365A CN 104050365 A CN104050365 A CN 104050365A CN 201410258813 A CN201410258813 A CN 201410258813A CN 104050365 A CN104050365 A CN 104050365A
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Abstract
The invention provides a designing method of a tire stock vulcanization system. The designing method comprises the steps of first, counting the variation range of thermophysical parameters and vulcanization dynamic parameters of a tire; then, establishing a tire vulcanization process numerical model, and carrying out orthogonal testing on the thermophysical parameters and vulcanization dynamic parameters respectively to determine the schema of relation between project positive vulcanization time and the thermophysical parameters and the vulcanization dynamic parameters and the primary and secondary sequence of influence of the thermophysical parameters and the vulcanization dynamic parameters on the positive vulcanization time; finally, selecting the main influencing factor of the positive vulcanization time, and adjusting the numerical value of the main factor according to the relation schema of the project positive vulcanization time and the main influencing factor to design the vulcanization system. The blindness of design of the tire stock vulcanization system is reduced, reasonable matching between different stocks and different vulcanization systems in the tire is realized, the tire vulcanization efficiency is improved, the development expense is reduced, the research and development cycle is shortened, and the thicker the fracture surface of the tire is, the more the layer number of the stock is, and the more effective the method disclosed by the invention is.
Description
Technical field
The present invention relates to a kind of method for designing of tyre stock vulcanizing system.
Background technology
The annular elastic article that tire is made up of multilayer rubber, rubber cord compound substance, each layer of effect is different, and its sizing compound formula vulcanizing system is also different.In order to improve tyre vulcanization efficiency, need the vulcanizing system of different sizing materials in Proper Match tire.Rubber vulcanization system comprises vulcanizing agent, promoter, activating agent and anti scorching agent etc., the adjustment by vulcanizing system its can be within the specific limits relatively independent control the parameters such as rubber density, specific heat capacity, coefficient of heat conductivity, energy of activation and frequency factor.
Sulfuration is last procedure that tire is manufactured, and determines its final performance.The vulcanization reaction of inside tires complexity makes vulcanization characteristics parameter distribution have obvious unevenness and time variation, and affects the many factors of tyre vulcanization, causes the design of tyre stock vulcanizing system to have blindness.Especially when in the face of complicated sulfuration objects such as multi-layer thick section radials, be difficult to the vulcanizing system between the inner different sizing materials of Proper Match.
Summary of the invention
For Shortcomings in prior art, the invention provides a kind of method for designing of tyre stock vulcanizing system.
The present invention realizes above-mentioned technical purpose by following technological means.
A method for designing for tyre stock vulcanizing system, is characterized in that, comprises the following steps:
The first step, adds up thermal physical property parameter, the sulfuration kinetic parameter of in tire, commonly using elastomeric material, determines the variation range of thermal physical property parameter, sulfuration kinetic parameter;
Second step, sets up tire vulcanization process numerical model, between temperature field and vulcanization field, is wherein order coupled relation, is all defined as commaterial M1, is defined as another kind of material M2 near the rubber of water pocket one side near the rubber of punching block one side;
The 3rd step, carries out orthogonal test to thermal physical property parameter, sulfuration kinetic parameter respectively, and described thermal physical property parameter, sulfuration kinetic parameter are got maximal value, minimum value and the intermediate value of its variation range, and response index is tire engineering sulfurizing time;
The 4th step, determine the graph of a relation of engineering sulfurizing time and thermal physical property parameter, sulfuration kinetic parameter according to the experimental result of the 3rd step, calculate the extreme difference of thermal physical property parameter, sulfuration kinetic parameter, and determine that according to experimental result thermal physical property parameter, sulfuration kinetic parameter affect primary and secondary sequentially to sulfurizing time;
The 5th step, affect primary and secondary sequentially according to thermal physical property parameter, sulfuration kinetic parameter to sulfurizing time, choose major influence factors, according to the graph of a relation of engineering sulfurizing time and this major influence factors, the numerical value of adjusting this principal element designs vulcanizing system.
Preferably, described thermal physical property parameter comprises coefficient of heat conductivity λ, specific heat capacity c, density p, and described sulfuration kinetic parameter comprises frequency factor
2and activation energy
1or energy of activation and gas law constant ratio E
1/ R.
Preferably, the variation range of coefficient of heat conductivity λ described in the described first step is 0.2～0.35W/ (m* DEG C), and the variation range of specific heat capacity c is 1～2.5kJ/kg, and the variation range of density p is 1078～1266kg/m
3.
Preferably, in described the 4th step, described thermal physical property parameter on the primary and secondary order that affects of sulfurizing time is: the coefficient of heat conductivity λ of material M1
1the specific heat capacity c of > material M1
1the density p of > material M1
1the specific heat capacity c of > material M2
2the coefficient of heat conductivity λ of > material M2
2the density p of > material M2
2.
Preferably, in described the 4th step, described sulfuration kinetic parameter on the primary and secondary order that affects of sulfurizing time is: the E of material M2
1the E of '/R> material M1
1the A of/R> material M1
2the A of > material M2
2'.
The present invention adopts technique scheme, has following beneficial effect:
(1) reduce tyre stock vulcanizing system design blindness, realize in tire the Proper Match between vulcanizing system between different sizing materials, improve tyre vulcanization efficiency;
(2) adopt modern design theory and method, carry out the coupling design of tyre stock vulcanizing system, reduce development cost, shorten the R&D cycle.
(3) tire section is thicker, the sizing material number of plies is more, and method of the present invention is more effective.
Brief description of the drawings
Fig. 1 is 11.00R20 radial curing system schematic diagram.
Fig. 2 is the graph of a relation between engineering sulfurizing time and hot physical property six factors.
Fig. 3 is the graph of a relation between engineering sulfurizing time and sulfuration dynamics four factors.
Description of reference numerals is as follows:
1-curing system, 2-the first metal die, 3-tire, 4-the second metal die, 5-water pocket, 6-wearing layer, 7-wire loop, 8-enhancement Layer, 9-pad glue, 10-transition glue, 11-body piles, 12-inner liner, 13-sidewall, 14-shoulder pad glue, 15-crown, 16-belt, 17-crown base portion glue.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to this.
The present invention is elaborated as embodiment using 11.00R20 radial, as shown in Figure 1, its curing system 1 comprises the first metal die 2, tire 3, the second metal die 4 and water pocket 5, and tire 3 is between the first metal die 2, the second metal die 4 and water pocket 5.Tire 3 also comprises wearing layer 6, wire loop 7, enhancement Layer 8, pad glue 9, transition glue 10, body piles 11, inner liner 12, sidewall 13, shoulder pad glue 14, crown 15, belt 16, crown base portion glue 17.Wherein, enhancement Layer 8, body piles 11 and belt 16 are rubber-cord composite structure, and metal die 2, metal die 4, wire loop 7 are metal construction, and all the other are rubber structure.In machine, cure time is 52min, and in front 5min capsule, superheated water temperature is down to 170 DEG C by 180 DEG C of linearities, and 47min temperature remains unchanged thereafter; 120 DEG C of the front 6min maintenances of sulfuration steam temperature are invariable, and rear 8min rises to 151 DEG C by 120 DEG C of linearities, and 151 DEG C of last 38min maintenances are invariable.Tire initial temperature is 30 DEG C, and sulfurizing mould initial temperature is 120 DEG C, and capsule initial temperature is 100 DEG C.The tire shoulder that this tire section size is the thickest is the position of difficult sulfuration, and vulcanization characteristics herein has directly determined sulfuration efficiency and the performance of whole tire,, taking tire shoulder as example, the method for designing of tyre stock vulcanizing system of the present invention is further illustrated for this reason.
The first step, carry out hot physical property and the statistical study of sulfuration dynamics test data of the conventional elastomeric material of tire, the variation range of determining rubber thermal physical property parameter and sulfuration kinetic parameter, aspect the hot physical property of elastomeric material, density p variation range is 1078～1266kg/m
3, coefficient of heat conductivity λ variation range is 0.2～0.35W/ (m* DEG C), specific heat capacity c variation range is 1～2.5kJ/kg; Aspect vulcanization of rubber dynamics, in order to simplify calculating, choose K-R model as sulfuration dynamic calculating model, the sulfuration kinetic parameter selecting frequency factor and energy of activation and gas law constant ratio.Frequency factor
2variation range be decided to be 596000000～728000000s
-1, energy of activation and gas law constant ratio E
1the variation range of/R is set as 8064～10080K.
Second step, set up tire vulcanization process numerical model, it between temperature field and vulcanization field, is wherein order coupled relation, the influence factor that is temperature field is only the thermal physical property parameter of material, vulcanization field is determined jointly by temperature field and vulcanization of rubber dynamics, suppose that near tread rubber, the sidewall rubber of punching block one side be commaterial M1, and be commaterial M2 near belt rubber, body piles rubber, inner liner, the shoulder wedge of water pocket one side.
The 3rd step, respectively thermal physical property parameter, sulfuration kinetic parameter are carried out to Orthogonal Experiment and Design, response index is tire engineering sulfurizing time (t70), wherein, material parameter is got maximal value, minimum value and three levels of intermediate value of its variation range, as shown in table 1, table 2:
The hot physical property design factor of table 1 rubber and level
Table 2 vulcanization of rubber dynamics Design factor and level
The 4th step, determine the graph of a relation of engineering sulfurizing time and thermal physical property parameter, sulfuration kinetic parameter according to the experimental result of the 3rd step, calculate the extreme difference of thermal physical property parameter, sulfuration kinetic parameter, and determine that according to experimental result thermal physical property parameter, sulfuration kinetic parameter affect primary and secondary sequentially to sulfurizing time.
Hot physical property orthogonal test conceptual design and the results are shown in Table 3, visible, because the water pocket thermal resistance in vulcanizer is larger, the hot physical property design factor of punching block one side material on the impact of engineering sulfurizing time apparently higher than the hot physical property design factor of water pocket one side material; By in table 4 to the comparing of each factor extreme difference value k, on the primary and secondary order that affects of sulfurizing time be: the coefficient of heat conductivity λ of material M1
1the specific heat capacity c of > material M1
1the density p of > material M1
1the specific heat capacity c of > material M2
2the coefficient of heat conductivity λ of > material M2
2the density p of > material M2
2.Visible, in the time that thermal physical property parameter is adjusted, emphasis need to be paid close attention to the thermal physical property parameter of punching block one side rubber, is secondly the specific heat capacity of water pocket one side rubber.
The hot physical property test scheme of table 3 rubber and result
| Tested number | ρ 1 | λ 1 | c 1 | ρ 2 | λ 2 | c 2 | t70/s |
| 1 | 1078 | 0.2 | 1 | 1078 | 0.2 | 1 | 2522 |
| 2 | 1078 | 0.2 | 1 | 1078 | 0.275 | 1.75 | 2559 |
| 3 | 1078 | 0.2 | 1 | 1078 | 0.35 | 2.5 | 2628 |
| 4 | 1078 | 0.275 | 1.75 | 1172 | 0.2 | 1 | 2640 |
| 5 | 1078 | 0.275 | 1.75 | 1172 | 0.275 | 1.75 | 2677 |
| 6 | 1078 | 0.275 | 1.75 | 1172 | 0.35 | 2.5 | 2743 |
| 7 | 1078 | 0.35 | 2.5 | 1266 | 0.2 | 1 | 2744 |
| 8 | 1078 | 0.35 | 2.5 | 1266 | 0.275 | 1.75 | 2780 |
| 9 | 1078 | 0.35 | 2.5 | 1266 | 0.35 | 2.5 | 2844 |
| 10 | 1172 | 0.2 | 1.75 | 1266 | 0.2 | 1.75 | 3197 |
| 11 | 1172 | 0.2 | 1.75 | 1266 | 0.275 | 2.5 | 3230 |
| 12 | 1172 | 0.2 | 1.75 | 1266 | 0.35 | 1 | 2899 |
| 13 | 1172 | 0.275 | 2.5 | 1078 | 0.2 | 1.75 | 3197 |
| 14 | 1172 | 0.275 | 2.5 | 1078 | 0.275 | 2.5 | 3208 |
| 15 | 1172 | 0.275 | 2.5 | 1078 | 0.35 | 1 | 2956 |
| 16 | 1172 | 0.35 | 1 | 1172 | 0.2 | 1.75 | 2341 |
| 17 | 1172 | 0.35 | 1 | 1172 | 0.275 | 2.5 | 2403 |
| 18 | 1172 | 0.35 | 1 | 1172 | 0.35 | 1 | 2095 |
| 19 | 1266 | 0.2 | 2.5 | 1172 | 0.2 | 2.5 | 3913 |
| 20 | 1266 | 0.2 | 2.5 | 1172 | 0.275 | 1 | 3597 |
| 21 | 1266 | 0.2 | 2.5 | 1172 | 0.35 | 1.75 | 3630 |
| 22 | 1266 | 0.275 | 1 | 1266 | 0.2 | 2.5 | 2736 |
| 23 | 1266 | 0.275 | 1 | 1266 | 0.275 | 1 | 2330 |
| 24 | 1266 | 0.275 | 1 | 1266 | 0.35 | 1.75 | 2416 |
| 25 | 1266 | 0.35 | 1.75 | 1078 | 0.2 | 2.5 | 2747 |
| 26 | 1266 | 0.35 | 1.75 | 1078 | 0.275 | 1 | 2472 |
| 27 | 1266 | 0.35 | 1.75 | 1078 | 0.35 | 1.75 | 2522 |
The comparison of the each factor extreme difference of the hot physical property of table 4 rubber value
Fig. 2 is thermal physical property parameter and response trend thereof, visible, along with punching block one side rubber density, specific heat capacity and water pocket one side rubber specific heat capacity increase, tire shoulder engineering sulfurizing time is obvious increase trend, and punching block one side rubber specific heat capacity has the greatest impact to engineering sulfurizing time; Along with rubber coefficient of heat conductivity increases, engineering sulfurizing time is and obviously reduces trend, and punching block one side rubber coefficient of heat conductivity is larger on the impact of engineering sulfurizing time; Near there is concave function relation between water pocket one side rubber density and engineering sulfurizing time, hence one can see that exists an optimal design to improve the vulcanization characteristics at tire shoulder position by this density; In sum, improving tread rubber coefficient of heat conductivity, reduce tread rubber specific heat capacity, is the effective way that reduces engineering sulfurizing time.
Sulfuration dynamics orthogonal test conceptual design results and analysis is in table 5 and table 6, by the comparing of each parameter extreme difference value k, on the E that primary and secondary order is material M2 that affects of engineering sulfurizing time
1the E of '/R> material M1
1the A of/R> material M1
2the A of > material M2
2', in the time that sulfuration kinetic parameter is adjusted, emphasis need to be considered the energy of activation of punching block one side rubber, is secondly the energy of activation of water pocket one side rubber as seen.Fig. 3 is sulfuration four factors of dynamics and response trend thereof, near having convex function relation between punching block one side rubber frequency factor and engineering sulfurizing time, and near there is concave function relation between water pocket one side rubber frequency factor and engineering sulfurizing time, hence one can see that exists an optimal design to improve the vulcanization characteristics at tire shoulder position by frequency factor; Along with the increase of energy of activation, tire shoulder engineering sulfurizing time is obvious increase trend, can realize easily the adjustment of engineering sulfurizing time as seen by changing energy of activation.In sum, change frequency factor can obtain optimal design and improve vulcanization characteristics, and reducing rubber energy of activation is the effective way that reduces engineering sulfurizing time.
Table 5 vulcanizes dynamic test scheme and result
| Tested number | A 2 | E 1/R | A 2’ | E 1’/R | t70/s |
| 1 | 5.96E+08 | 8064 | 5.96E+08 | 8064 | 1189 |
| 2 | 5.96E+08 | 9072 | 7.28E+08 | 9072 | 2005 |
| 3 | 5.96E+08 | 10080 | 6.6E+08 | 10080 | 3473 |
| 4 | 6.6E+08 | 8064 | 7.28E+08 | 10080 | 3317 |
| 5 | 6.6E+08 | 9072 | 6.6E+08 | 8064 | 2005 |
| 6 | 6.6E+08 | 10080 | 5.96E+08 | 9072 | 3473 |
| 7 | 7.28E+08 | 8064 | 6.6E+08 | 9072 | 1917 |
| 8 | 7.28E+08 | 9072 | 5.96E+08 | 10080 | 3317 |
| 9 | 7.28E+08 | 10080 | 7.28E+08 | 8064 | 3473 |
Table 6 vulcanizes the comparison of the each factor extreme difference of dynamics value
The 5th step, affect primary and secondary sequentially according to thermal physical property parameter, sulfuration kinetic parameter to sulfurizing time, choose major influence factors, according to the graph of a relation of engineering sulfurizing time and this major influence factors, be Fig. 2, Fig. 3, the numerical value of adjusting this principal element designs vulcanizing system, improve to greatest extent tread rubber coefficient of heat conductivity, reduce tread rubber specific heat capacity, reduce tire shoulder place and have rubber energy of activation, thereby effectively reduce engineering sulfurizing time, realize the appropriate design of this tyre stock vulcanizing system.
Described embodiment is preferred embodiment of the present invention; but the present invention is not limited to above-mentioned embodiment; in the situation that not deviating from flesh and blood of the present invention, any apparent improvement, replacement or modification that those skilled in the art can make all belong to protection scope of the present invention.
Claims (5)
1. a method for designing for tyre stock vulcanizing system, is characterized in that, comprises the following steps:
The first step, the thermal physical property parameter of conventional elastomeric material, sulfuration kinetic parameter in statistics tire, described thermal physical property parameter comprises coefficient of heat conductivity, specific heat capacity, density, described sulfuration kinetic parameter comprises frequency factor, energy of activation, determines the variation range of thermal physical property parameter, sulfuration kinetic parameter;
Second step, sets up tire vulcanization process numerical model, between temperature field and vulcanization field, is wherein order coupled relation, is all defined as commaterial M1, is defined as another kind of material M2 near the rubber of water pocket one side near the rubber of punching block one side;
The 3rd step, carries out orthogonal test to thermal physical property parameter, sulfuration kinetic parameter respectively, and described thermal physical property parameter, sulfuration kinetic parameter are got maximal value, minimum value and the intermediate value of its variation range, and response index is tire engineering sulfurizing time;
The 4th step, determine the graph of a relation of engineering sulfurizing time and thermal physical property parameter, sulfuration kinetic parameter according to the experimental result of the 3rd step, calculate the extreme difference of thermal physical property parameter, sulfuration kinetic parameter, and determine that according to experimental result thermal physical property parameter, sulfuration kinetic parameter affect primary and secondary sequentially to sulfurizing time;
The 5th step, affect primary and secondary sequentially according to thermal physical property parameter, sulfuration kinetic parameter to sulfurizing time, choose major influence factors, according to the graph of a relation of engineering sulfurizing time and this major influence factors, the numerical value of adjusting this principal element designs vulcanizing system.
2. the method for designing of tyre stock vulcanizing system according to claim 1, is characterized in that, described thermal physical property parameter comprises coefficient of heat conductivity λ, specific heat capacity c, density p, and described sulfuration kinetic parameter comprises frequency factor
2and activation energy
1or energy of activation and gas law constant ratio E
1/ R.
3. the method for designing of tyre stock vulcanizing system according to claim 2, it is characterized in that, the variation range of coefficient of heat conductivity λ described in the described first step is 0.2～0.35W/ (m* DEG C), the variation range of specific heat capacity c is 1～2.5kJ/kg, and the variation range of density p is 1078～1266kg/m
3.
4. the method for designing of tyre stock vulcanizing system according to claim 2, is characterized in that, in described the 4th step, described thermal physical property parameter on the primary and secondary order that affects of sulfurizing time is: the coefficient of heat conductivity λ of material M1
1the specific heat capacity c of > material M1
1the density p of > material M1
1the specific heat capacity c of > material M2
2the coefficient of heat conductivity λ of > material M2
2the density p of > material M2
2.
5. the method for designing of tyre stock vulcanizing system according to claim 2, is characterized in that, in described the 4th step, described sulfuration kinetic parameter on the primary and secondary order that affects of sulfurizing time is: the E of material M2
1the E of '/R> material M1
1the A of/R> material M1
2the A of > material M2
2'.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108776214A (en) * | 2017-10-16 | 2018-11-09 | 中国电力科学研究院有限公司武汉分院 | A kind of determination method of excellent electromechanical properties HTV insulating materials curing parameters |
| CN113917124A (en) * | 2021-10-08 | 2022-01-11 | 安徽佳通乘用子午线轮胎有限公司 | Method for predicting performance of rubber material of finished tire product |
| CN113917124B (en) * | 2021-10-08 | 2024-06-04 | 安徽佳通乘用子午线轮胎有限公司 | Prediction method for performances of tire finished rubber |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101439563A (en) * | 2008-12-24 | 2009-05-27 | 昊华南方(桂林)橡胶有限责任公司 | Process for changing outer temperature of tire when vulcanizing tire |
| CN101831090B (en) * | 2010-04-02 | 2011-12-21 | 南京理工大学 | High-performance natural rubber vulcanized rubber of carbon-containing nano-tube, and preparation method thereof |
| CN101996272B (en) * | 2010-10-28 | 2013-11-06 | 江苏科技大学 | Method for simulating vulcanization process of rubber product |
| CN102218840B (en) * | 2011-05-30 | 2014-06-04 | 江苏科技大学 | Method for simulating vulcanization of all-steel radial tire |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108776214A (en) * | 2017-10-16 | 2018-11-09 | 中国电力科学研究院有限公司武汉分院 | A kind of determination method of excellent electromechanical properties HTV insulating materials curing parameters |
| CN113917124A (en) * | 2021-10-08 | 2022-01-11 | 安徽佳通乘用子午线轮胎有限公司 | Method for predicting performance of rubber material of finished tire product |
| CN113917124B (en) * | 2021-10-08 | 2024-06-04 | 安徽佳通乘用子午线轮胎有限公司 | Prediction method for performances of tire finished rubber |
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