CN114393752A - Nitrogen medium vulcanization method for all-steel radial tire vulcanization process - Google Patents
Nitrogen medium vulcanization method for all-steel radial tire vulcanization process Download PDFInfo
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- CN114393752A CN114393752A CN202111586590.7A CN202111586590A CN114393752A CN 114393752 A CN114393752 A CN 114393752A CN 202111586590 A CN202111586590 A CN 202111586590A CN 114393752 A CN114393752 A CN 114393752A
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- Prior art keywords
- nitrogen
- pressure
- stage
- maintaining
- condensation
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 187
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004073 vulcanization Methods 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 10
- 239000010959 steel Substances 0.000 title claims abstract description 10
- 230000005494 condensation Effects 0.000 claims abstract description 37
- 238000009833 condensation Methods 0.000 claims abstract description 37
- 238000007599 discharging Methods 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000011084 recovery Methods 0.000 claims abstract 2
- 230000008569 process Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 210000001161 mammalian embryo Anatomy 0.000 claims description 3
- 230000031877 prophase Effects 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims 1
- 230000009467 reduction Effects 0.000 abstract description 3
- 208000028659 discharge Diseases 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000001514 detection method Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
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
- B29D30/0602—Vulcanising tyres; Vulcanising presses for tyres the vulcanising medium being in direct contact with the tyre
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
The invention belongs to the field of all-steel radial tire vulcanization, and particularly relates to a nitrogen medium vulcanization method in a vulcanization process of an all-steel radial tire, which comprises the steps of feeding low-pressure steam, a first condensation discharging stage, a first temperature rising stage and feeding high-pressure steam; in the second condensation discharging stage, high-pressure steam is fed and condensation discharging of the high-pressure steam is carried out; in the second heating stage, high-pressure steam is fed; in the third condensation discharging stage, high-pressure steam is fed and condensation discharging of the high-pressure steam is carried out; a third temperature rise stage; a first stage of introducing nitrogen, and maintaining the pressure of the nitrogen; a fourth discharging and condensing stage; in the second stage of introducing nitrogen, maintaining the pressure of the nitrogen; a fifth condensation discharge stage; a third stage of introducing nitrogen; detecting nitrogen pressure maintaining; introducing nitrogen, and maintaining the pressure of the nitrogen; a nitrogen recovery process is performed. The method of the invention can ensure that the vulcanization degree of each component is uniform when the tire is vulcanized, reduce the temperature difference between the upper part and the lower part of the tire, and detect the performance reduction of the tire caused by the leakage of nitrogen.
Description
Technical Field
The invention belongs to the field of all-steel radial tire vulcanization, and particularly relates to a nitrogen medium vulcanization method in a vulcanization process of an all-steel radial tire.
Background
With the increasingly strengthened concept of green environmental protection at home and abroad, the mode of using green energy nitrogen to replace the mode of heating hot water as the internal heat source of the tire has become the mainstream.
The hot water process uses high-temperature and high-pressure hot water as a vulcanizing medium, so that a large amount of energy loss exists in the water heating process and the hot water transportation process, and meanwhile, the pipeline is corroded, the environment is polluted by sealing leakage, the expenditure cost is increased, and the resources are wasted due to the difference of oxygen content in the hot water.
Disclosure of Invention
The invention aims to provide a nitrogen medium vulcanization method in the vulcanization process of an all-steel radial tire, which can ensure that the vulcanization degree of each component is uniform during tire vulcanization, reduce the temperature difference between the upper part and the lower part of the tire and detect the performance reduction of the tire caused by the leakage of nitrogen.
The present invention is achieved in such a way that,
a nitrogen medium vulcanization method for an all-steel radial tire vulcanization process comprises the following steps:
step 1: shaping embryo, and introducing low pressure steam for 60 s;
step 2: in the first condensation discharging stage, high-pressure steam is fed and subjected to condensation discharging for 45 s;
and step 3: in the first heating stage, high-pressure steam is fed for 150 s;
and 4, step 4: in the second condensation discharging stage, high-pressure steam is fed and subjected to condensation discharging for 3 s;
and 5: in the second heating stage, high-pressure steam is fed for 150 s;
step 6: in the third condensation discharging stage, high-pressure steam is fed and subjected to condensation discharging for 3 s;
and 7: in the third heating stage, high-pressure steam is fed for 150 s;
and 8: a first stage of introducing nitrogen, and maintaining the pressure of the nitrogen for 22 s;
and step 9: in the fourth condensation removing stage, introducing nitrogen, removing condensation by nitrogen and maintaining pressure by nitrogen simultaneously, wherein the time is 12 s;
step 10: in the second stage of introducing nitrogen, maintaining the pressure of the nitrogen for 300 s;
step 11: in the fifth condensation discharging stage, introducing nitrogen, discharging condensation by nitrogen and maintaining pressure by nitrogen simultaneously, wherein the time is 3 s;
step 12: introducing nitrogen into the third stage, and maintaining the pressure of the nitrogen for 1380s-3120 s;
step 13: maintaining the pressure of nitrogen, stopping the nitrogen from entering the step, detecting the change of the pressure value of the pressure-maintaining nitrogen in the pipeline, judging whether the prophase vulcanized nitrogen leaks, and if the pressure is reduced by more than 0.2Mpa when the step starts at the end, determining that the nitrogen leaks for 120 s;
step 14: introducing nitrogen, maintaining the pressure of the nitrogen, and setting the time of the step 14 to be 60s when no leakage is detected in the step 13, and setting the time to be 120s-360s when leakage is detected;
step 15: recovering nitrogen for 30 s;
the main row is kept open in the above steps;
step 16: exhausting the gas for 15 s;
and step 17: the vacuum was applied for 15 s.
Further, the pressure of the low-pressure steam is 1.0 +/-0.1 MPa.
Further, the pressure of the high-pressure steam is 1.4 +/-0.1 MPa, and the time is 198 +/-3 ℃.
Further, the pressure of the nitrogen is 2.45-2.65 MPa.
Further, the pressure is reduced to 0.1-0.3 MPa by the aid of the condensation removing.
Further, the temperature difference between the left die and the right die in the step 5 and the step 7 is less than or equal to 3 ℃.
Furthermore, the temperature difference between the left die and the right die in the stage of nitrogen pressure maintaining is less than or equal to 7 ℃.
Furthermore, when the nitrogen is recovered, the pressure is kept less than or equal to 0.7 MPa.
Furthermore, the pressure in the main discharge pipeline is less than or equal to 0.2 MPa.
Compared with the prior art, the invention has the beneficial effects that:
the method ensures that the whole tire is vulcanized more uniformly by combining the test temperature of each part of the tire with the vulcanization degree of rubber materials of each part, ensures that condensed water is discharged to ensure the uniformity of the upper mold and the lower mold of the tire by setting the condensate discharge in the early steam stage, and ensures that the nitrogen leakage which possibly occurs before the tire is vulcanized out of a boiler is alarmed, shut down and processed in a delayed way by setting the vulcanization leakage-proof detection step.
The method of the invention can ensure that the vulcanization degree of each component is uniform when the tire is vulcanized, reduce the temperature difference between the upper part and the lower part of the tire, and detect the performance reduction of the tire caused by the leakage of nitrogen.
Drawings
Fig. 1 is a schematic structural diagram of a pipeline in a vulcanization process according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and table 1, a nitrogen medium vulcanization method for an all-steel radial tire vulcanization process comprises the following steps:
step 1: shaping embryo, and introducing low pressure steam for 60 s;
step 2: in the first condensation discharging stage, high-pressure steam is fed and subjected to condensation discharging for 45 s;
and step 3: in the first heating stage, high-pressure steam is fed for 150 s;
and 4, step 4: in the second condensation discharging stage, high-pressure steam is fed and subjected to condensation discharging for 3 s;
and 5: in the second heating stage, high-pressure steam is fed for 150 s;
step 6: in the third condensation discharging stage, high-pressure steam is fed and subjected to condensation discharging for 3 s;
and 7: in the third heating stage, high-pressure steam is fed for 150 s;
and 8: a first stage of introducing nitrogen, and maintaining the pressure of the nitrogen for 22 s;
and step 9: in the fourth condensation removing stage, introducing nitrogen, removing condensation by nitrogen and maintaining pressure by nitrogen simultaneously, wherein the time is 12 s;
step 10: in the second stage of introducing nitrogen, maintaining the pressure of the nitrogen for 300 s;
step 11: in the fifth condensation discharging stage, introducing nitrogen, discharging condensation by nitrogen and maintaining pressure by nitrogen simultaneously, wherein the time is 3 s;
step 12: introducing nitrogen into the third stage, and maintaining the pressure of the nitrogen for 1380s-3120 s;
step 13: maintaining the pressure of nitrogen, stopping the nitrogen from entering the step, detecting the change of the pressure value of the pressure-maintaining nitrogen in the pipeline, judging whether the prophase vulcanized nitrogen leaks, and if the pressure is reduced by more than 0.2Mpa when the step starts at the end, determining that the nitrogen leaks for 120 s;
step 14: introducing nitrogen, maintaining the pressure of the nitrogen, and setting the time of the step 14 to be 60s when no leakage is detected in the step 13, and setting the time to be 120s-360s when leakage is detected;
step 15: recovering nitrogen for 30 s;
the main row is kept open in the above steps;
step 16: exhausting the gas for 15 s;
and step 17: the vacuum was applied for 15 s.
TABLE 1 method steps of an embodiment
Referring to Table 2, the pressure of the low pressure steam was 1.0. + -. 0.1 MPa. The pressure of the high-pressure steam is 1.4 +/-0.1 MPa, and the time is 198 +/-3 ℃. The pressure of the nitrogen is 2.45-2.65 MPa. The pressure is reduced to 0.1-0.3 MPa by the drainage of the condensate. In the step 5 and the step 7, the temperature difference between the left die and the right die is less than or equal to 3 ℃. The temperature difference between the left die and the right die in the stage of containing nitrogen for pressure maintaining is less than or equal to 7 ℃. When the nitrogen is recovered, the pressure is kept less than or equal to 0.7 Mpa. The pressure in the main discharge pipeline is less than or equal to 0.2 Mpa.
TABLE 2 temperature and pressure conditions in the respective steps
The method of the invention ensures that the heating uniformity of the nitrogen process at the whole temperature is far higher than that of the hot water process, the durability of the nitrogen process is superior to that of the hot water process through the mileage pair of a laboratory, and meanwhile, the detection step sequence in the step sequence can prevent the generation of the batch quality problem caused by the nitrogen leakage which cannot be detected in other factories.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A nitrogen medium vulcanization method in an all-steel radial tire vulcanization process is characterized by comprising the following steps:
step 1: shaping embryo, and introducing low pressure steam for 60 s;
step 2: in the first condensation discharging stage, high-pressure steam is fed and subjected to condensation discharging for 45 s;
and step 3: in the first heating stage, high-pressure steam is fed for 150 s;
and 4, step 4: in the second condensation discharging stage, high-pressure steam is fed and subjected to condensation discharging for 3 s;
and 5: in the second heating stage, high-pressure steam is fed for 150 s;
step 6: in the third condensation discharging stage, high-pressure steam is fed and subjected to condensation discharging for 3 s;
and 7: in the third heating stage, high-pressure steam is fed for 150 s;
and 8: a first stage of introducing nitrogen, and maintaining the pressure of the nitrogen for 22 s;
and step 9: in the fourth condensation removing stage, introducing nitrogen, removing condensation by nitrogen and maintaining pressure by nitrogen simultaneously, wherein the time is 12 s;
step 10: in the second stage of introducing nitrogen, maintaining the pressure of the nitrogen for 300 s;
step 11: in the fifth condensation discharging stage, introducing nitrogen, discharging condensation by nitrogen and maintaining pressure by nitrogen simultaneously, wherein the time is 3 s;
step 12: introducing nitrogen into the third stage, and maintaining the pressure of the nitrogen for 1380s-3120 s;
step 13: maintaining the pressure of nitrogen, stopping the nitrogen from entering the step, detecting the change of the pressure value of the pressure-maintaining nitrogen in the pipeline, judging whether the prophase vulcanized nitrogen leaks, and if the pressure is reduced by more than 0.2Mpa when the step starts at the end, determining that the nitrogen leaks for 120 s;
step 14: introducing nitrogen, maintaining the pressure of the nitrogen, and setting the time of the step 14 to be 60s when no leakage is detected in the step 13, and setting the time to be 120s-360s when leakage is detected;
step 15: recovering nitrogen for 30 s;
the main row is kept open in the above steps;
step 16: exhausting the gas for 15 s;
and step 17: the vacuum was applied for 15 s.
2. The method of claim 1, wherein the low pressure steam has a pressure of 1.0 ± 0.1 Mpa.
3. The method of claim 1, wherein the high pressure steam has a pressure of 1.4 ± 0.1Mpa and a time of 198 ± 3 ℃.
4. The method according to claim 1, wherein the pressure of the nitrogen gas is 2.45 to 2.65 Mpa.
5. The method of claim 1, wherein said de-condensing reduces the pressure to a value between 0.1 and 0.3 MPa.
6. The method of claim 1, wherein the difference between the temperature of the left and right molds in steps 5 and 7 is less than or equal to 3 ℃.
7. The process of claim 1, wherein the difference between the temperature of the left and right molds during the nitrogen dwell time-containing stage is less than or equal to 7 ℃.
8. The method of claim 1, wherein the pressure is maintained at 0.7MPa or less during the nitrogen recovery.
9. The method of claim 1, wherein the pressure in the main discharge line is less than or equal to 0.2 Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111586590.7A CN114393752B (en) | 2021-12-23 | 2021-12-23 | Nitrogen medium vulcanization method for all-steel radial tire vulcanization process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111586590.7A CN114393752B (en) | 2021-12-23 | 2021-12-23 | Nitrogen medium vulcanization method for all-steel radial tire vulcanization process |
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| Publication Number | Publication Date |
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| CN114393752A true CN114393752A (en) | 2022-04-26 |
| CN114393752B CN114393752B (en) | 2023-12-29 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100771696B1 (en) * | 2006-09-29 | 2007-10-31 | 금호타이어 주식회사 | Device of cure press for laboratory tire |
| CN202540570U (en) * | 2011-11-11 | 2012-11-21 | 广州市华南橡胶轮胎有限公司 | Steam system for improved tire vulcanization |
| CN203566980U (en) * | 2013-10-10 | 2014-04-30 | 建阳义正机械制造有限公司 | Central mechanism of energy-saving tire vulcanizing machine |
| CN103804730A (en) * | 2014-03-06 | 2014-05-21 | 江苏通用科技股份有限公司 | All-steel radial tire tread rubber and preparation method thereof |
| JP2016055528A (en) * | 2014-09-10 | 2016-04-21 | 横浜ゴム株式会社 | Tire vulcanizing apparatus and method for vulcanizing tire using the same |
| CN108192156A (en) * | 2017-12-06 | 2018-06-22 | 福建省海安橡胶有限公司 | Triangle rubber sizing material and preparation method under a kind of all-steel giant-scale engineering radial |
-
2021
- 2021-12-23 CN CN202111586590.7A patent/CN114393752B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100771696B1 (en) * | 2006-09-29 | 2007-10-31 | 금호타이어 주식회사 | Device of cure press for laboratory tire |
| CN202540570U (en) * | 2011-11-11 | 2012-11-21 | 广州市华南橡胶轮胎有限公司 | Steam system for improved tire vulcanization |
| CN203566980U (en) * | 2013-10-10 | 2014-04-30 | 建阳义正机械制造有限公司 | Central mechanism of energy-saving tire vulcanizing machine |
| CN103804730A (en) * | 2014-03-06 | 2014-05-21 | 江苏通用科技股份有限公司 | All-steel radial tire tread rubber and preparation method thereof |
| JP2016055528A (en) * | 2014-09-10 | 2016-04-21 | 横浜ゴム株式会社 | Tire vulcanizing apparatus and method for vulcanizing tire using the same |
| CN108192156A (en) * | 2017-12-06 | 2018-06-22 | 福建省海安橡胶有限公司 | Triangle rubber sizing material and preparation method under a kind of all-steel giant-scale engineering radial |
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| Publication number | Publication date |
|---|---|
| CN114393752B (en) | 2023-12-29 |
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