CN101439563A - Process for changing outer temperature of tire when vulcanizing tire - Google Patents
Process for changing outer temperature of tire when vulcanizing tire Download PDFInfo
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- CN101439563A CN101439563A CNA2008101074100A CN200810107410A CN101439563A CN 101439563 A CN101439563 A CN 101439563A CN A2008101074100 A CNA2008101074100 A CN A2008101074100A CN 200810107410 A CN200810107410 A CN 200810107410A CN 101439563 A CN101439563 A CN 101439563A
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Abstract
The invention relates to a tire altering outer temperature vulcanization technique. Vulcanization is carried out in a capsule according to conventional technique in optimum cure period; the steam temperature outside a tire is controlled in two or three different temperature periods: the initial outer temperature is higher, namely, 138-150 DEG C, and is kept within 120-500 minutes; or the initial outer temperature is 138-143 DEG C and is kept within 120-300 minutes; the temperature gradually falls in the later period to 125-137 DEG C and is kept within 60-360 minutes; or the temperature falls to 132-137 DEG C and is kept within 120-240 minutes; if the temperature difference in each period is 2-10 DEG C, the altering temperature time is 1-10 minutes; if the temperature difference in each period is 3-5 DEG C, the altering temperature time is 1-3 minutes. The temperature of optimum cure in initial period is higher, so that the temperature outside the tire is increased faster, and the vulcanizing time is shortened. The deep part of the tire is affected slightly after the temperature is decreased, and can be vulcanized continuously. The technique ensures full internal tire vulcanization, avoids or reduces over vulcanization outside the tire, therefore, the technology is applicable to large-tire vulcanization, ensures the quality of the tire, decreases the steam temperature of outer temperature, shortens the use time and reduces energy consumption.
Description
(1) technical field
The present invention relates to tyre vulcanizing, be specially a kind of process for changing outer temperature of tire when vulcanizing tire.
(2) background technology
Mostly the sulfuration process of tire is the isobaric isothermal vulcanization technology of the outer temperature of interior gentleness at present.Control of temperature is the medium of feeding certain temperature and pressure in sulfuration induction period and presulfurization phase capsule and continues for some time in it; The uninterrupted superheated water that feeds certain temperature and pressure keeps the constant temperature and pressure in the capsule in optimum cure phase capsule.Be the outer temperature of control simultaneously, the outer external pressure temperature steam of tire keeps constant temperature.The tire base is loaded on and places the vaporium sulfuration in the mould then.
The optimum cure temperature of general tire is more than 145 ℃, and some tyres for passenger cars optimum cure temperature is up to 200 ℃, but sulfurizing time is very short.For giant tyre, its carcass rubber thickness reaches 150～300mm, needs sulfurizing time long.For avoiding the over cure on surface, adopt than the much lower curing temperature of general tire optimum cure phase temperature more, as the optimum cure temperature only is 138 degree, but the overlong time that optimum cure needs under low like this temperature, when the carcass inner rubber reached the optimum cure requirement, the rubber of carcass outside is over cure often.Over cure descends physical properties of rubber compound significantly, influences tire quality.
The sulfuration process of giant embryo needs to improve again.
(3) summary of the invention
The objective of the invention is to design a kind of process for changing outer temperature of tire when vulcanizing tire, adopt the outer temperature of plural different temperatures section, make tyre vulcanization even, effectively reduce over cure and take place, to improve tire quality in the tire optimum cure phase.
The process for changing outer temperature of tire when vulcanizing tire of the present invention's design, the technology of sulfuration induction period and presulfurization phase is common process, in the tire optimum cure phase, in the capsule routinely technology uninterruptedly feed superheated water, keep the constant temperature and pressure in the capsule, the outer vapor (steam) temperature of tire is controlled to be 2 or 3 different temperature stages, adopt 138 ℃～150 ℃ of higher outer temperature during beginning, hold time is 120～500 minutes, scheme is that the outer temperature of incipient stage is 138 ℃～143 ℃ preferably, and holding time is 120～300 minutes.The optimum cure temperature at initial stage is higher, and outside tires is comparatively fast heated up, to shorten cure time.The high temperature vulcanized concluding time is the time (also promptly bubbling the time) that has begun sulphur when the thickest center of tire, and this time can obtain by the sulfuration thermometric, also can preferably obtain by the sulfuration thermometric by calculating.It is 125 ℃～137 ℃ that later stage progressively lowers the temperature, and holding time is 60～360 minutes, makes tire continue to finish optimum cure.Scheme is that cooling is 132 ℃～137 ℃ preferably, and holding time is 120～240 minutes.The temperature difference in each stage is 2 ℃～10 ℃, and the alternating temperature time between each stage is 1～10 minute, and scheme is that the temperature difference in each stage is 3 ℃～5 ℃ preferably, and the alternating temperature time between each stage is 1～3 minute.
When the thickest center of tire begun sulphur, suitably reduce the curing temperature of outside tires.Cooling position, rear tyre deep institute is influenced very little, still can continue sulfuration.Be like this result not only can guarantee the inside tires sulfuration fully but also can guarantee that outside tires is not subjected to the effect of excessive temperature, thereby reduce or avoid the over cure phenomenon to take place.
The temperature of the used sulfuration of this technology is according to the decision of tire thickness, and the temperature of the tyre vulcanization that thickness is big is lower, and cure time is longer; The temperature of thickness smaller sulfuration is higher, and cure time is shorter.Because of the thermal conductivity factor of tyre stock is very little, it is slower to conduct heat, if curing temperature is too high, the glue of depths, the thickest position of tire does not also begin sulfuration or still undervulcanization, and has produced over cure with the sizing material of model contact position.
The advantage of process for changing outer temperature of tire when vulcanizing tire of the present invention is: 1, need not to use long-time, tyre vulcanization is even, effectively avoids or reduce the over cure phenomenon taking place, and is specially adapted to the sulfuration of giant tyre, has improved tire quality; 2, reduced the vapor (steam) temperature and the service time of keeping outer temperature, reduced energy resource consumption.
(4) specific embodiment
Embodiment 1
Overall diameter is the 30.00R51 radial that 2904mm, 22 inches of rim widths, section width 823mm, carcass maximum ga(u)ge reach 150mm, the superheated water of 165 ℃ of feedings, 3.2Mpa in sulfuration induction period and its capsule of presulfurization phase, outer temperature steam is 100～120 ℃.In the optimum cure phase, the uninterrupted superheated water of 165 ℃ of temperature 3.2Mpa pressure, the constant temperature and pressure in the maintenance capsule of feeding in the capsule, the outer vapor (steam) temperature of tire is controlled to be 2 different temperature stages.By the temperature that institute's survey vaporium inner tube of a tyre is outer the steam pressure of sending into vaporium is regulated, promptly regulated the quantity of steam of sending into vaporium, thus the steam regulation indoor temperature.
(1) outer warm vapor (steam) temperature is 140 ℃, keeps 200 minutes;
(2) outer warm steam was reduced to 132 ℃ in 2 minutes;
(3) outer warm steam maintenance was kept 240 minutes for 132 ℃, finished optimum cure.
Embodiment 2
Overall diameter is the 40R57 radial that 3594mm, 29 inches of rim widths, section width 1097mm, carcass maximum ga(u)ge reach 220mm, and sulfuration is identical with example 1 with presulfurization phase sulfuration process induction period.In the optimum cure phase, the constant temperature and pressure in the capsule in the superheated water of 160 ℃ of uninterrupted feedings, 3Mpa pressure, the maintenance capsule, the outer vapor (steam) temperature of tire is controlled to be different temperature by 3 stages,
(1) outer warm vapor (steam) temperature is 140 ℃, keeps 260 minutes;
(2) outer warm steam was reduced to 136 ℃ in 2 minutes;
(3) outer warm steam maintenance was kept 200 minutes for 136 ℃, continued sulfuration;
(4) outer warm steam was reduced to 132 ℃ in 1 minute;
(5) outer warm steam maintenance was kept 60 minutes for 132 ℃, finished optimum cure.
Embodiment 3
Diameter is 3780mm, and 36 inches of rim widths, section width 1346mm, carcass maximum ga(u)ge reach the 53/80R63 radial of 270mm, and sulfuration is identical with example 1 with presulfurization phase sulfuration process induction period.In the optimum cure phase, the constant temperature and pressure in the capsule in the superheated water of 165 ℃ of uninterrupted feedings, 3.5Mpa pressure, the maintenance capsule, the outer vapor (steam) temperature of tire is controlled to be different temperature by 3 stages,
(1) outer warm vapor (steam) temperature is 138 ℃, keeps 300 minutes;
(2) outer warm steam was reduced to 135 ℃ in 2 minutes;
(3) outer warm steam maintenance was kept 160 minutes for 135 ℃, continued sulfuration;
(4) outer warm steam was reduced to 132 ℃ in 2 minutes;
(5) outer warm steam maintenance was kept 120 minutes for 132 ℃, finished optimum cure.
Embodiment 4
Diameter is 2702mm, and 19.50 inches of rim widths, section width 737mm, carcass maximum ga(u)ge reach the 27R49 radial of 150mm, and sulfuration is identical with example 1 with presulfurization phase sulfuration process induction period.In the optimum cure phase, the constant temperature and pressure in the capsule in the superheated water of 165 ℃ of uninterrupted feedings, 3.5Mpa pressure, the maintenance capsule, the outer vapor (steam) temperature of tire is controlled to be different temperature by 2 stages,
(1) outer warm vapor (steam) temperature is 143 ℃, keeps 120 minutes;
(2) outer warm steam was reduced to 133 ℃ in 10 minutes;
(3) outer warm steam maintenance was kept 240 minutes for 133 ℃, finished optimum cure.
Embodiment 5
Diameter is 3061mm, and 24 inches of rim widths, section width 894mm, carcass maximum ga(u)ge reach the 33R51 radial of 180mm, and sulfuration is identical with example 1 with presulfurization phase sulfuration process induction period.In the optimum cure phase, the uninterrupted constant temperature and pressure that feeds in superheated water, the maintenance capsule in the capsule, the outer vapor (steam) temperature of tire is controlled to be different temperature by 2 stages,
(1) outer warm vapor (steam) temperature is 140 ℃, keeps 120 minutes;
(2) outer warm steam was reduced to 135 ℃ in 2 minutes;
(4) outer warm steam maintenance was kept 240 minutes for 135 ℃, finished optimum cure.
Embodiment 6
Diameter is 3438mm, and 37 inches of rim widths, section width 1016mm, carcass maximum ga(u)ge reach the 37R57 radial of 210mm, and sulfuration is identical with example 1 with presulfurization phase sulfuration process induction period.In the optimum cure phase, the uninterrupted constant temperature and pressure that feeds in superheated water, the maintenance capsule in the capsule, the outer vapor (steam) temperature of tire is controlled to be different temperature by 3 stages,
(1) outer warm vapor (steam) temperature is 150 ℃, keeps 60 minutes;
(2) outer warm steam was reduced to 143 ℃ in 3 minutes;
(3) outer warm steam maintenance was kept 60 minutes for 143 ℃, continued sulfuration;
(4) outer warm steam was reduced to 132 ℃ in 2 minutes;
(5) outer warm steam maintenance was kept 300 minutes for 132 ℃, finished optimum cure.
Embodiment 7
Diameter is 3594mm, and 37 inches of rim widths, section width 1016mm, carcass maximum ga(u)ge reach the 40R57 radial of 220mm, and sulfuration is identical with example 1 with presulfurization phase sulfuration process induction period.In the optimum cure phase, the uninterrupted constant temperature and pressure that feeds in superheated water, the maintenance capsule in the capsule, the outer vapor (steam) temperature of tire is controlled to be different temperature by 3 stages,
(1) outer warm vapor (steam) temperature is 150 ℃, keeps 60 minutes;
(2) outer warm steam was reduced to 140 ℃ in 10 minutes;
(3) outer warm steam maintenance was kept 60 minutes for 140 ℃, continued sulfuration;
(4) outer warm steam was reduced to 137 ℃ in 2 minutes;
(5) outer warm steam maintenance was kept 300 minutes for 137 ℃, finished optimum cure.
Embodiment 8
Diameter is 3233mm, and 26 inches of rim widths, section width 988mm, carcass maximum ga(u)ge reach the 36R51 radial of 200mm, and sulfuration is identical with example 1 with presulfurization phase sulfuration process induction period.In the optimum cure phase, the uninterrupted constant temperature and pressure that feeds in superheated water, the maintenance capsule in the capsule, the outer vapor (steam) temperature of tire is controlled to be different temperature by 3 stages,
(1) outer warm vapor (steam) temperature is 143 ℃, keeps 200 minutes;
(2) outer warm steam was reduced to 133 ℃ in 10 minutes;
(3) outer warm steam maintenance was kept 120 minutes for 133 ℃, continued sulfuration;
(4) outer warm steam was reduced to 125 ℃ in 2 minutes;
(5) outer warm steam maintenance was kept 240 minutes for 125 ℃, finished optimum cure.
Embodiment 9
Diameter is 3780mm, and 36 inches of rim widths, section width 1346mm, carcass maximum ga(u)ge reach the 53/80R63 radial of 270mm, and sulfuration is identical with example 1 with presulfurization phase sulfuration process induction period.In the optimum cure phase, the uninterrupted constant temperature and pressure that feeds in superheated water, the maintenance capsule in the capsule, the outer vapor (steam) temperature of tire is controlled to be different temperature by 3 stages,
(1) outer warm vapor (steam) temperature is 143 ℃, keeps 120 minutes;
(2) outer warm steam was reduced to 138 ℃ in 7 minutes;
(3) outer warm steam maintenance was kept 200 minutes for 138 ℃, continued sulfuration;
(4) outer warm steam was reduced to 132 ℃ in 2 minutes;
(5) outer warm steam maintenance was kept 200 minutes for 132 ℃, finished optimum cure.
Embodiment 10
Diameter is 4069mm, and 44 inches of rim widths, section width 1499mm, carcass maximum ga(u)ge reach the 59/80R63 radial of 300mm, and sulfuration is identical with example 1 with presulfurization phase sulfuration process induction period.In the optimum cure phase, the uninterrupted constant temperature and pressure that feeds in superheated water, the maintenance capsule in the capsule, the outer vapor (steam) temperature of tire is controlled to be different temperature by 3 stages,
(1) outer warm vapor (steam) temperature is 138 ℃, keeps 300 minutes;
(2) outer warm steam was reduced to 132 ℃ in 8 minutes;
(3) outer warm steam maintenance was kept 120 minutes for 132 ℃, continued sulfuration;
(4) outer warm steam was reduced to 125 ℃ in 2 minutes;
(5) outer warm steam maintenance was kept 240 minutes for 125 ℃, finished optimum cure.
Comparative Examples
Overall diameter is the 40R57 radial that 3594mm, 29 inches of rim widths, section width 1097mm, carcass maximum ga(u)ge reach 220mm, and sulfuration is identical with preceding embodiment with presulfurization phase sulfuration process induction period.In the optimum cure phase, the uninterrupted superheated water of 165 ℃ of temperature 3.2Mpa pressure, the constant temperature and pressure in the maintenance capsule of feeding in the capsule, the outer steam of tire remains 138 ℃, and 540 minutes, its time spent was longer than this technology, finishes optimum cure.
Above each example is carried out the tyre vulcanization product test, and the method for inspection is as follows:
1) tire after the sulfuration is dissected the physical and mechanical properties test of carrying out vulcanizate, and the performance of its result and this sizing material laboratory test piece optimum cure compares, and explanation has the over cure phenomenon if performance reduces then.
2) tire that comes out of sulfuration is respectively got the glue of 3 grams～8 grams at the tyre surface multiple spot, measures its fault sulphur content, and the fault sulphur content of its result during with the test piece optimum cure of this sizing material laboratory compares, and as if the fault sulphur too high levels over cure phenomenon has been described then.Assay, more than 5% over cure phenomenon only appears in the tire that adopts this technology to finish optimum cure, and 12% over cure appears in the surface of tyre that Comparative Examples adopts common process to carry out optimum cure.
Above embodiment shows that this outer warm vulcanizing technology can effectively reduce the generation of tire over cure phenomenon, can shorten sulfurizing time simultaneously, enhances productivity.
The foregoing description is the specific case that purpose of the present invention, technical scheme and beneficial effect are further described only, and the present invention is defined in this.All any modifications of within scope of disclosure of the present invention, being made, be equal to replacement, improvement etc., all be included within protection scope of the present invention.
Claims (5)
1, a kind of process for changing outer temperature of tire when vulcanizing tire, the technology of sulfuration induction period and presulfurization phase is that common process is identical, in the tire optimum cure phase, in the capsule routinely technology uninterruptedly feed superheated water, it is characterized in that:
The outer vapor (steam) temperature of optimum cure phase tire is controlled to be 2 or 3 different temperature stages, adopt 138 ℃～150 ℃ of higher outer temperature during beginning, holding time is 120～500 minutes, and it is 125 ℃～137 ℃ that the later stage progressively lowers the temperature, holding time is 60～360 minutes, makes tire continue to finish optimum cure.
2, process for changing outer temperature of tire when vulcanizing tire according to claim 1 is characterized in that:
Temperature difference between described each stage is 2 ℃～10 ℃, and the alternating temperature time between each stage is 1～10 minute.
3, process for changing outer temperature of tire when vulcanizing tire according to claim 1 and 2 is characterized in that:
The outer temperature of the vapor (steam) temperature incipient stage that optimum cure phase tire is outer is 138 ℃～143 ℃, and holding time is 120～300 minutes.
4, process for changing outer temperature of tire when vulcanizing tire according to claim 1 and 2 is characterized in that:
It is 132 ℃～137 ℃ that the outer vapor (steam) temperature later stage of optimum cure phase tire progressively lowers the temperature, and holding time is 120～240 minutes.
5, process for changing outer temperature of tire when vulcanizing tire according to claim 1 and 2 is characterized in that:
The temperature difference in described each stage is 3 ℃～5 ℃, and the alternating temperature time between each stage is 1～3 minute.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101074100A CN101439563A (en) | 2008-12-24 | 2008-12-24 | Process for changing outer temperature of tire when vulcanizing tire |
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| CNA2008101074100A CN101439563A (en) | 2008-12-24 | 2008-12-24 | Process for changing outer temperature of tire when vulcanizing tire |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102658617A (en) * | 2012-05-02 | 2012-09-12 | 三角轮胎股份有限公司 | Method for vulcanizing giant engineering radial tire |
| CN102700035A (en) * | 2011-01-17 | 2012-10-03 | 潍坊跃龙橡胶有限公司 | Intermittent hot water circulation pressure stabilization insulation tyre vulcanization technology |
| CN104400944A (en) * | 2014-11-20 | 2015-03-11 | 三角轮胎股份有限公司 | Low-outer-temperature vulcanization method for off-the-road tires |
| CN104050365B (en) * | 2014-06-11 | 2017-02-22 | 江苏大学 | Designing method of tire stock vulcanization system |
| CN106541527A (en) * | 2015-09-21 | 2017-03-29 | 风神轮胎股份有限公司 | All-steel engineering tire vulcanizing technique |
| CN106863861A (en) * | 2017-01-25 | 2017-06-20 | 桂林裕天新材料有限公司 | A kind of preparation method of the silicone band that insulate |
| CN107244025A (en) * | 2017-08-04 | 2017-10-13 | 徐州徐轮橡胶有限公司 | A kind of tire curing method |
| CN114102929A (en) * | 2021-11-16 | 2022-03-01 | 安徽佳通乘用子午线轮胎有限公司 | Recognition method for external temperature monitoring interval of vulcanizing machine and evaluation method for external temperature control stability |
-
2008
- 2008-12-24 CN CNA2008101074100A patent/CN101439563A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102700035A (en) * | 2011-01-17 | 2012-10-03 | 潍坊跃龙橡胶有限公司 | Intermittent hot water circulation pressure stabilization insulation tyre vulcanization technology |
| CN102658617A (en) * | 2012-05-02 | 2012-09-12 | 三角轮胎股份有限公司 | Method for vulcanizing giant engineering radial tire |
| CN102658617B (en) * | 2012-05-02 | 2014-09-17 | 三角轮胎股份有限公司 | Method for vulcanizing giant engineering radial tire |
| CN104050365B (en) * | 2014-06-11 | 2017-02-22 | 江苏大学 | Designing method of tire stock vulcanization system |
| CN104400944A (en) * | 2014-11-20 | 2015-03-11 | 三角轮胎股份有限公司 | Low-outer-temperature vulcanization method for off-the-road tires |
| CN106541527A (en) * | 2015-09-21 | 2017-03-29 | 风神轮胎股份有限公司 | All-steel engineering tire vulcanizing technique |
| CN106541527B (en) * | 2015-09-21 | 2018-11-13 | 风神轮胎股份有限公司 | All-steel engineering tire vulcanizing technique |
| CN106863861A (en) * | 2017-01-25 | 2017-06-20 | 桂林裕天新材料有限公司 | A kind of preparation method of the silicone band that insulate |
| CN107244025A (en) * | 2017-08-04 | 2017-10-13 | 徐州徐轮橡胶有限公司 | A kind of tire curing method |
| CN114102929A (en) * | 2021-11-16 | 2022-03-01 | 安徽佳通乘用子午线轮胎有限公司 | Recognition method for external temperature monitoring interval of vulcanizing machine and evaluation method for external temperature control stability |
| CN114102929B (en) * | 2021-11-16 | 2023-12-01 | 安徽佳通乘用子午线轮胎有限公司 | Method for identifying external temperature monitoring interval of vulcanizing machine and method for evaluating external temperature control stability |
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Open date: 20090527 |