CN1290595A - Method and equpment for heating nitrogenation and vulcanization of tyre - Google Patents
Method and equpment for heating nitrogenation and vulcanization of tyre Download PDFInfo
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- CN1290595A CN1290595A CN 00111170 CN00111170A CN1290595A CN 1290595 A CN1290595 A CN 1290595A CN 00111170 CN00111170 CN 00111170 CN 00111170 A CN00111170 A CN 00111170A CN 1290595 A CN1290595 A CN 1290595A
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Abstract
During the vulcanization of tyre, heated and pressurized pure nitrogen is charged directly to rubber bag inside the tyre mold in a vulcanizing machine or cylinder. The method and equipment of the present invention provides continuous change of pressure and temperature and thus high quality of tyre without damage to internal structure of tyre caused by rapid change in pressure and temperature. The present invention results in prolonged service life of rubber bag, raised production efficiency, lowered production cost and less environmental pollution.
Description
The invention belongs to rubber industry, be specifically related to tire curing method and apparatus.
Before the present invention made, the method for traditional tyre vulcanization was to be hot water and steam medium, and promptly the capsule in tire-mold charges into hot water or steam; With single mode, bimodulus or plunger jar equipment as tyre vulcanization.But this method needs huge boiler, hot water treatment system, and not only floor space is big, cost is high.Environment there is pollution, and owing to steam and superheated water cause reduce the service life of capsule and tire to the thermo-oxidative ageing of tire and capsule.So a lot of in the world tire production producers all come vulcanized tyre in exploration with the alternative superheated water of inert gases such as nitrogen over nearly 20 years, their method is:
1. fetus is inserted model;
2. the low-pressure nitrogen with 0.0138～0.2756MPa charges into the typing that capsule carries out fetus;
3. 1.378～1.722MPa high steam is charged into capsule, sulfuration institute calorific requirement is provided, different according to tire specification with kind, sustainable 2～6 minutes of this step;
4. charge into high pressure nitrogen (〉=2.067MPa) to improve the interior pressure of capsule in the residue cure time;
5. the emptying capsule takes out tire.
This method has obviously reduced production cost, has improved the quality of tire, has prolonged the service life of capsule, helps environmental protection (seeing " tire industry " 1999 19 volumes).But its weak point is also clearly:
1. steam mixes with nitrogen in the tire vulcanization process, causes the nitrogen under the HTHP impure, and makes capsule and tire also have the peroxide problem of aging;
2. tyre vulcanization needs a large amount of heats, is far from being enough and only charge into high steam at initial vulcanization step as thermal source, so this method has prolonged the cure time of tire relatively;
3. steam condenses into water and accumulates in the following half side of capsule later on, so can cause the inhomogeneities of tyre vulcanization;
4. owing to contain big water gaging in the nitrogen,, thereby improved production cost relatively so the recycling rate of waterused of nitrogen is too low.
The present invention provides a kind of tyre vulcanization effective for addressing the above problem, and energy savings reduces the tire curing method of hot nitrogen of sulfuration cost.
For achieving the above object, the present invention is the tire curing method of a kind of hot nitrogen that realizes like this, comprises tire vulcanization process, and when tyre vulcanization, direct capsule in the tire-mold of vulcanizer or vulcanizing tank charges into the pure nitrogen gas after heating, the pressurization.
When the above-mentioned nitrogen that charges in the capsule, temperature in capsule 160～180 ± 2 ℃, pressure stability is at 2～3MPa.
The above-mentioned concrete steps of pure nitrogen gas that charge in capsule after heating, the pressurization are as follows: 1). and from air, extract nitrogen and be collected in the air accumulator; 2). the nitrogen of air accumulator is sent into after through compressor pressurizes to a 2.5～3.5MPa in accumulator; 3). with tire fetus pressure be the air of 0.02～0.2MPa evenly finalize the design and the mould of packing in; 4). the nitrogen of an accumulator is passed through a gas heater, after making nitrogen temperature reach 110 ± 2 ℃, capsule is sent in import by vulcanizer or the original water of vulcanizing tank, and the nitrogen gas pressure in the capsule is reduced to 1.2～1.8MPa, and the air that stays during typing in the capsule is discharged; 5). send in the secondary accumulator after the nitrogen of air accumulator is pressurized to 3.5～4.5MPa through secondary compressor; 6). the nitrogen of secondary accumulator is passed through the secondary air heater, after making nitrogen temperature reach 180 ± 2 ℃, capsule is sent in import by vulcanizer or the original secondary water of vulcanizing tank, and the nitrogen gas pressure in the capsule is 2.0～3.0MPa, and temperature is 160～180 ± 2 ℃; 7). keep the circulation of secondary nitrogen path and air accumulator, keep the temperature and pressure of nitrogen in the capsule to meet the requirements; 8). vulcanized tyre.
The above-mentioned step of extracting nitrogen from air is: 1). air pressurized is sent into air tank behind 1.0MPa; 2). the air in the air tank is sent into draining in the cooling driers; 3). the air after the draining is sent into PSV anionic molecule sieve and is extracted nitrogen.
The optimum pressure of an above-mentioned air accumulator is 2.5MPa, and the optimum pressure of secondary air accumulator is 4.0MPa; The interior nitrogen gas pressure the best of capsule is 2.6MPa during tyre vulcanization, and temperature is 180 ℃.
A kind of tire curing equipment of hot nitrogen that is exclusively used in said method, nitrogen storage gas tank are provided with air inlet, circulation air inlet, nitrogen gas outlet and secondary nitrogen gas outlet; Nitrogen is sent into the import of an accumulator in a nitrogen gas outlet under the drive of an air compressor machine through pipeline, the outlet of an accumulator connects the import of a gas heater through pipeline, the outlet of a gas heater connects a former water inlet of vulcanizing tank or vulcanizer through selecting valve, forms one time the nitrogen path; Nitrogen is sent into the import of secondary accumulator in secondary nitrogen gas outlet under the drive of secondary air compressor machine through pipeline, the outlet of secondary accumulator connects the import of secondary air heater through pipeline, the outlet of secondary air heater connects the former secondary water inlet of vulcanizing tank or vulcanizer through selecting valve, forms secondary nitrogen path; A former water inlet of vulcanizer or vulcanizing tank forms the peripheral passage by the circulation air inlet of the valve connection nitrogen storage gas tank of a path of isolation; The air inlet of nitrogen storage gas tank connects nitrogen-making device or liquid nitrogen container by selecting valve.
Above-mentioned nitrogen-making device is, two PSV nitrogen making machines of blowback mutually.
An above-mentioned nitrogen path, secondary nitrogen path, peripheral passage all are provided with valve in necessary position.
A kind of air accumulator that is exclusively used in the tire curing equipment of hot nitrogen comprises tank body, air inlet and gas outlet, and the inner tank wall of described air accumulator is equipped with temperature sensor; Flowmeter is installed in the air inlet of described air accumulator and/or gas outlet.
A kind of gas heater that is exclusively used in the tire curing equipment of hot nitrogen, comprise casing and be arranged at the interior tracheae of casing, it is circular double-layer structure that described tracheae is wound in cross section, and 6 electric heaters of circumference uniform distribution between the two-layer tracheae, tracheae adopt heat conduction good metal material to make.
Advantage of the present invention and good effect are:
1. raising tire quality
The pressure of tyre vulcanization and the continuity of temperature are good, avoided in the tire vulcanization process pressure with
The rising sharply of temperature, rapid drawdown and infringement that the inside tires structure is caused.This method and technology
The tire of sulfuration can run 200 hours on the tyre last experimental machine, and national standard
It is 57 hours.
2. prolonged the service life of capsule
Because in the sulfidation, promptly under HTHP, so the pure nitrogen in the capsule is glue
The overheated problem of aging of capsule does not exist substantially, and the life-span of capsule can prolong 100%.
3. improved labor productivity
Tyre vulcanization is actually a heat exchanging process under the certain pressure, and the high temperature height of nitrogen
Pressure be superheated water and steam can not compare, circulating nitrogen gas can replenish tire fast under the pressurize
Vulcanize required heat and pressure.The sulfuration of employing nitrogen can save time 10%.
4. reduced production cost
The conveying of boiler, hot water station, hot water needs very big initial investment and later period maintenance expense, nitrogen
The heating of gas is all finished by electric power with pressurization, has reduced the loss in the energy transfer process, nitrogen
Gas does not have secondary corrosion substantially to whole sulfuration pipeline yet, energy-conservationly reaches 50%.
5. help environmental protection
The extraction of nitrogen does not all have to pollute with discharging, and the heating of nitrogen is all directly intact by electric power with pressurization
Become, also do not have atmosphere pollution.
6. the scope of application is wide
Can be applicable to single mode, bimodulus and plunger jar; And can adjust at any time nitrogen gas pressure and temperature with
Satisfy the requirement of different kinds of tyre prescription.
Below in conjunction with accompanying drawing the present invention is described in further detail
Fig. 1 is the nitrogen flow chart of one embodiment of the invention;
Fig. 2 is the flow chart of medium in the one embodiment of the invention capsule;
Fig. 3 is an one embodiment of the invention nitrogen treatment systematic schematic diagram;
Fig. 4 is the front view of one embodiment of the invention accumulator;
Fig. 5 is the main cutaway view of an embodiment gas heater of the utility model.
As shown in Figure 1 and Figure 2, the tire curing method of a kind of hot nitrogen comprises tire vulcanization process, and when tyre vulcanization, direct capsule in the tire-mold of vulcanizer or vulcanizing tank charges into the pure nitrogen gas after heating, the pressurization.Can select to charge into the temperature and pressure of nitrogen in capsule in the capsule according to the difference of the prescription of tire and specification, during typical temperature 160～180 ± 2 ℃, pressure stability is at 2～3MPa.
The concrete steps of the pure nitrogen gas that charge into heating in capsule, pressurizes are as follows:
1). from air, extract nitrogen and be collected in the air accumulator;
2). the nitrogen of air accumulator is sent into after through compressor pressurizes to a 2.5～3.5MPa in accumulator;
3). with tire fetus pressure be the air of 0.02～0.2MPa evenly finalize the design and the mould of packing in;
4). the nitrogen of an accumulator is passed through a gas heater, after making nitrogen temperature reach 110 ± 2 ℃, capsule is sent in import by vulcanizer or the original water of vulcanizing tank, and the nitrogen gas pressure in the capsule is reduced to 1.2～1.8MPa, and the air that stays during typing in the capsule is discharged;
5). send in the secondary accumulator after the nitrogen of air accumulator is pressurized to 3.5～4.5MPa through secondary compressor;
6). the nitrogen of secondary accumulator is passed through the secondary air heater, after making nitrogen temperature reach 160～180 ± 2 ℃, capsule is sent in import by vulcanizer or the original secondary water of vulcanizing tank, and the nitrogen gas pressure in the capsule is 2.0～3.0MPa, and temperature is 160～180 ± 2 ℃;
7). keep the circulation of secondary nitrogen path and air accumulator, keep the temperature and pressure of nitrogen in the capsule to meet the requirements;
8). vulcanized tyre.Because nitrogen than higher, can directly be extracted in the market price of nitrogen from air.Step is:
1). air pressurized is sent into air tank behind 1.0MPa;
2). the air in the air tank is sent into draining in the cooling driers;
3). the air after the draining is sent into PSV anionic molecule sieve and is extracted nitrogen.
For high-capacity tyre, the optimum pressure of an air accumulator is 2.5MPa, and the optimum pressure of secondary air accumulator is 4.0MPa; The interior nitrogen gas pressure the best of capsule is 2.6MPa during tyre vulcanization, and temperature is 180 ℃.
As shown in Figure 2, a kind of tire curing equipment of hot nitrogen that is exclusively used in said method, nitrogen storage gas tank 21 are provided with air inlet 22, circulation air inlet 23, a nitrogen gas outlet 24 and a secondary nitrogen gas outlet 25; Nitrogen is sent into the import 27 of an accumulator in a nitrogen gas outlet 24 under the drive of an air compressor machine 26 through pipeline, the outlet 28 of an accumulator connects the import 29 of a gas heater through pipeline, the outlet 30 of a gas heater connects a former water inlet 32 of vulcanizing tank 31 or vulcanizer through selecting valve F7, forms one time the nitrogen path; Nitrogen is sent into the import 34 of secondary accumulator in secondary nitrogen gas outlet 25 under the drive of secondary air compressor machine 33 through pipeline, the outlet 35 of secondary accumulator connects the import 36 of secondary air heater through pipeline, the outlet 37 of secondary air heater connects the former secondary water inlet 38 of vulcanizing tank or vulcanizer through selecting valve F8, forms secondary nitrogen path; A former water inlet 30 of vulcanizer or vulcanizing tank forms the peripheral passage by the circulation air inlet 23 that the valve F9 that isolates a path connects the nitrogen storage gas tank; The air inlet 22 of nitrogen storage gas tank connects nitrogen-making device 39 or liquid nitrogen container 40 by selecting valve.
Because molecular sieve can occur saturatedly when extracting nitrogen with molecular sieve, so nitrogen-making device is designed to two PSV nitrogen making machine connections of blowback mutually, such molecular sieve work to another molecular sieve blowback, can realize continuous operation simultaneously.
Need on the pipeline of nitrogen path, secondary nitrogen path, peripheral passage, valve can be set arbitrarily for what construct, overhaul, use.
As shown in Figure 4, a kind of air accumulator that is exclusively used in the tire curing equipment of hot nitrogen comprises tank body 1, air inlet 2 and gas outlet 3, and the inner tank wall 4 of air accumulator is equipped with temperature sensor 5; Flowmeter 6 is installed in the air inlet 2 of air accumulator and/or gas outlet 3.
As shown in Figure 5, a kind of gas heater that is exclusively used in the tire curing equipment of hot nitrogen, comprise casing 14 and be arranged at the interior tracheae 11 of casing, it is circular double-layer structure that tracheae 11 is wound in cross section, 6 electric heaters 17 of circumference uniform distribution between the two-layer tracheae 11, tracheae 11 adopts heat conduction good metal material to make, as carbon steel, stainless steel etc.
Claims (10)
1. the tire curing method of hot nitrogen comprises tire vulcanization process, it is characterized in that: when tyre vulcanization, direct capsule in the tire-mold of vulcanizer or vulcanizing tank charges into the pure nitrogen gas after heating, the pressurization.
2. the tire curing method of hot nitrogen according to claim 1 is characterized in that: when the above-mentioned nitrogen that charges in the capsule, temperature in capsule 160～180 ± 2 ℃, pressure stability is at 2～3MPa.
3. the tire curing method of hot nitrogen according to claim 2 is characterized in that: the above-mentioned concrete steps that charge into pure nitrogen gas in capsule are as follows:
1). from air, extract nitrogen and be collected in the air accumulator;
2). the nitrogen of air accumulator is sent into after through compressor pressurizes to a 2.5～3.5MPa in accumulator;
3). with tire fetus pressure be the air of 0.02～0.2MPa evenly finalize the design and the mould of packing in;
4). the nitrogen of an accumulator is passed through a gas heater, after making nitrogen temperature reach 110 ± 2 ℃, capsule is sent in import by vulcanizer or the original water of vulcanizing tank, and the nitrogen gas pressure in the capsule is reduced to 1.2～1.8MPa, and the air that stays during typing in the capsule is discharged;
5). send in the secondary accumulator after the nitrogen of air accumulator is pressurized to 3.5～4.5MPa through secondary compressor;
6). the nitrogen of secondary accumulator is passed through the secondary air heater, after making nitrogen temperature reach 180 ± 2 ℃, capsule is sent in import by vulcanizer or the original secondary water of vulcanizing tank, and the nitrogen gas pressure in the capsule is 2.0～3.0MPa, and temperature is 160～180 ± 2 ℃;
7). keep the circulation of secondary nitrogen path and air accumulator, keep the temperature and pressure of nitrogen in the capsule to meet the requirements;
8). vulcanized tyre.
4. the tire curing method of hot nitrogen according to claim 3 is characterized in that: the above-mentioned step of extracting nitrogen from air is:
1). air pressurized is sent into air tank behind 1.0MPa;
2). the air in the air tank is sent into draining in the cooling driers;
3). the air after the draining is sent into PSV anionic molecule sieve and is extracted nitrogen.
5. the tire curing method of hot nitrogen according to claim 3, it is characterized in that: the optimum pressure of an above-mentioned air accumulator is 2.5MPa, the optimum pressure of secondary air accumulator is 4.0MPa; The interior nitrogen gas pressure the best of capsule is 2.6MPa during tyre vulcanization, and temperature is 180 ℃.
6. tire curing equipment of hot nitrogen that is exclusively used in said method is characterized in that: the nitrogen storage gas tank is provided with air inlet, circulation air inlet, nitrogen gas outlet and secondary nitrogen gas outlet; Nitrogen is sent into the import of an accumulator in a nitrogen gas outlet under the drive of an air compressor machine through pipeline, the outlet of an accumulator connects the import of a gas heater through pipeline, the outlet of a gas heater connects a former water inlet of vulcanizing tank or vulcanizer through selecting valve, forms one time the nitrogen path; Nitrogen is sent into the import of secondary accumulator in secondary nitrogen gas outlet under the drive of secondary air compressor machine through pipeline, the outlet of secondary accumulator connects the import of secondary air heater through pipeline, the outlet of secondary air heater connects the former secondary water inlet of vulcanizing tank or vulcanizer through selecting valve, forms secondary nitrogen path; A former water inlet of vulcanizer or vulcanizing tank forms the peripheral passage by the circulation air inlet of the valve connection nitrogen storage gas tank of a path of isolation; The air inlet of nitrogen storage gas tank connects nitrogen-making device or liquid nitrogen container by selecting valve.
7. the tire curing equipment of hot nitrogen according to claim 6 is characterized in that: above-mentioned nitrogen-making device is, two PSV nitrogen making machines of blowback mutually.
8. the tire curing equipment of hot nitrogen according to claim 6 is characterized in that: an above-mentioned nitrogen path, secondary nitrogen path, peripheral passage all are provided with valve in necessary position.
9. an air accumulator that is exclusively used in the tire curing equipment of hot nitrogen comprises tank body (1), air inlet (2) and gas outlet (3), and it is characterized in that: the inner tank wall of described air accumulator (4) is equipped with temperature sensor (5); Flowmeter (6) is installed in the air inlet of described air accumulator (2) and/or gas outlet (3).
10. gas heater that is exclusively used in the tire curing equipment of hot nitrogen, comprise casing (14) and be arranged at the interior tracheae (11) of casing, it is characterized in that: it is circular double-layer structure that described tracheae (11) is wound in cross section, 6 electric heaters of circumference uniform distribution (17) between the two-layer tracheae (11), tracheae (11) adopt heat conduction good metal material to make.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB001111701A CN1156360C (en) | 2000-07-07 | 2000-07-07 | Method and equpment for heating nitrogenation and vulcanization of tyre |
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| CNB001111701A CN1156360C (en) | 2000-07-07 | 2000-07-07 | Method and equpment for heating nitrogenation and vulcanization of tyre |
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| CN1290595A true CN1290595A (en) | 2001-04-11 |
| CN1156360C CN1156360C (en) | 2004-07-07 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102363339A (en) * | 2011-11-08 | 2012-02-29 | 双钱集团（如皋）轮胎有限公司 | Tyre rubber vulcanizing technology |
| CN103786288A (en) * | 2013-12-30 | 2014-05-14 | 中国化工橡胶桂林轮胎有限公司 | Vulcanization method for prolonging service life of capsule |
| CN104385506A (en) * | 2014-11-24 | 2015-03-04 | 三角轮胎股份有限公司 | Pressure retention and temperature varying nitrogen vulcanization method for tire |
| CN105108944A (en) * | 2015-09-30 | 2015-12-02 | 唐松青 | Method for vulcanizing tire through hot nitrogen |
| CN111361063A (en) * | 2020-04-10 | 2020-07-03 | 杨佳洲 | Tire shaping vulcanizer |
| CN112848430A (en) * | 2020-12-31 | 2021-05-28 | 联亚智能科技（苏州）有限公司 | Electric heating tyre vulcanizer |
| CN112959569A (en) * | 2021-01-11 | 2021-06-15 | 上海游龙橡胶制品有限公司 | High-pressure nitrogen electromagnetic heating vulcanizing device |
| CN114714649A (en) * | 2022-04-14 | 2022-07-08 | 青岛海茵电气科技有限公司 | Electromagnetic heating tire internal temperature vulcanizing device |
-
2000
- 2000-07-07 CN CNB001111701A patent/CN1156360C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102363339A (en) * | 2011-11-08 | 2012-02-29 | 双钱集团（如皋）轮胎有限公司 | Tyre rubber vulcanizing technology |
| CN102363339B (en) * | 2011-11-08 | 2014-04-02 | 双钱集团（如皋）轮胎有限公司 | Tyre rubber vulcanizing technology |
| CN103786288A (en) * | 2013-12-30 | 2014-05-14 | 中国化工橡胶桂林轮胎有限公司 | Vulcanization method for prolonging service life of capsule |
| CN103786288B (en) * | 2013-12-30 | 2016-04-20 | 中国化工橡胶桂林轮胎有限公司 | A kind of vulcanization process improving capsule service life |
| CN104385506A (en) * | 2014-11-24 | 2015-03-04 | 三角轮胎股份有限公司 | Pressure retention and temperature varying nitrogen vulcanization method for tire |
| CN105108944A (en) * | 2015-09-30 | 2015-12-02 | 唐松青 | Method for vulcanizing tire through hot nitrogen |
| CN111361063A (en) * | 2020-04-10 | 2020-07-03 | 杨佳洲 | Tire shaping vulcanizer |
| CN112848430A (en) * | 2020-12-31 | 2021-05-28 | 联亚智能科技（苏州）有限公司 | Electric heating tyre vulcanizer |
| CN112959569A (en) * | 2021-01-11 | 2021-06-15 | 上海游龙橡胶制品有限公司 | High-pressure nitrogen electromagnetic heating vulcanizing device |
| CN114714649A (en) * | 2022-04-14 | 2022-07-08 | 青岛海茵电气科技有限公司 | Electromagnetic heating tire internal temperature vulcanizing device |
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| CN1156360C (en) | 2004-07-07 |
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