CN114393752B - 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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- CN114393752B CN114393752B CN202111586590.7A CN202111586590A CN114393752B CN 114393752 B CN114393752 B CN 114393752B CN 202111586590 A CN202111586590 A CN 202111586590A CN 114393752 B CN114393752 B CN 114393752B
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- nitrogen
- pressure
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- fed
- maintaining
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 176
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004073 vulcanization Methods 0.000 title claims abstract description 24
- 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 25
- 238000009833 condensation Methods 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000011084 recovery Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 7
- 208000028659 discharge Diseases 0.000 claims description 6
- PFRUBEOIWWEFOL-UHFFFAOYSA-N [N].[S] Chemical compound [N].[S] PFRUBEOIWWEFOL-UHFFFAOYSA-N 0.000 claims description 3
- 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
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000010586 diagram Methods 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
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0602—Vulcanising tyres; Vulcanising presses for tyres the vulcanising medium being in direct contact with the tyre
Landscapes
- 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, in particular to a nitrogen medium vulcanization method in an all-steel radial tire vulcanization process, which comprises the steps of feeding low-pressure steam, first condensation removal, first temperature rise and feeding high-pressure steam; in the second condensation stage, high-pressure steam is fed and is condensed; in the second heating stage, high-pressure steam is fed; in the third condensation stage, high-pressure steam is fed and is condensed; a third heating stage; the first nitrogen charging stage is performed, and nitrogen pressure maintaining is performed; a fourth dephlegmator stage; a second nitrogen inlet stage, and nitrogen pressure maintaining is carried out; a fifth dephlegmator stage; a third nitrogen inlet stage; nitrogen pressure maintaining detection; introducing nitrogen, and maintaining pressure of the nitrogen; and (5) carrying out a nitrogen recovery process. The method can ensure uniform vulcanization degree of each part when the tire is vulcanized, reduce the temperature difference between the upper part and the lower part of the tire, and detect whether the nitrogen leakage exists or not to cause the performance reduction of the tire.
Description
Technical Field
The invention belongs to the field of all-steel radial tire vulcanization, and particularly relates to a nitrogen medium vulcanization method for an all-steel radial tire vulcanization process.
Background
With the increasing enhancement of the environment protection concept at home and abroad, the mode of using green energy nitrogen instead of heating hot water as the heat source inside the tire has become the mainstream.
The vulcanizing medium used in the hot water process is high-temperature high-pressure hot water, so that a great amount of energy is lost in the water heating process and the hot water transportation process, and meanwhile, pipelines are corroded and sealed to leak to pollute the environment, the expenditure cost is increased, and the resource is wasted due to the difference of oxygen content in the hot water.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the nitrogen medium vulcanization method for the vulcanizing process of the all-steel radial tire, so that the vulcanization degree of each part can be ensured to be uniform during tire vulcanization, the temperature difference between the upper part and the lower part of the tire is reduced, and the performance of the tire is reduced due to the detection of whether the nitrogen leaks or not.
The present invention has been achieved in such a way that,
a nitrogen medium vulcanization method for a vulcanization process of an all-steel radial tire comprises the following steps:
step 1: the embryo is shaped, low-pressure steam is fed, and the time is 60s;
step 2: in the first condensation stage, high-pressure steam is fed and condensed for 45s;
step 3: in the first heating stage, high-pressure steam is fed for 150s;
step 4: in the second condensation stage, high-pressure steam is fed and condensed for 3s;
step 5: in the second heating stage, high-pressure steam is fed for 150s;
step 6: in the third condensation stage, high-pressure steam is fed and condensed for 3s;
step 7: in the third heating stage, high-pressure steam is fed for 150s;
step 8: the first nitrogen charging stage is carried out, and nitrogen pressure maintaining is carried out for 22s;
step 9: in the fourth condensation discharge stage, introducing nitrogen, nitrogen condensation discharge and nitrogen pressure maintaining are performed simultaneously for 12s;
step 10: the second nitrogen feeding stage is carried out, and nitrogen pressure maintaining is carried out for 300s;
step 11: in the fifth condensation discharging stage, nitrogen is introduced, nitrogen condensation discharging and nitrogen pressure maintaining are simultaneously carried out for 3s;
step 12: a third nitrogen-introducing stage, and performing nitrogen pressure maintaining for 1380s-3120s;
step 13: the nitrogen is kept pressure, the nitrogen stops entering in the step, the pressure value change of the kept pressure nitrogen in a pipeline is detected, whether leakage occurs in the early-stage sulfur nitrogen or not is judged, when the pressure minus the pressure at the beginning of the step is more than 0.2Mpa at the end, the leakage occurs in the nitrogen, and the time is 120s;
step 14: introducing nitrogen, maintaining pressure of the nitrogen, and setting the time of step 14 to be 60s when no leakage is detected in step 13, and setting the time of detecting leakage to be 120-360 s if the leakage occurs;
step 15: nitrogen recovery is carried out for 30s;
in the steps, the main row is kept open;
step 16: exhausting the gas and maintaining for 15s;
step 17: 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 dephlegmator reduces the pressure to a value between 0.1 and 0.3 MPa.
Further, the temperature difference between the left and right dies in the step 5 and the step 7 is less than or equal to 3 ℃.
Further, the temperature difference between the left and right dies in the stage of pressure maintaining containing nitrogen is less than or equal to 7 ℃.
Further, the pressure is kept to be less than or equal to 0.7Mpa during nitrogen recovery.
Further, the pressure in the main pipeline is less than or equal to 0.2Mpa.
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 the sizing material of each part, ensures the uniformity of the upper and lower molds of the tire by discharging condensed water through setting the drainage condensation of the earlier steam stage, and ensures the alarm, shutdown and delay treatment of possible nitrogen leakage before the vulcanization is discharged from a pot through setting the vulcanization leakage-proof detection step.
The method can ensure uniform vulcanization degree of each part when the tire is vulcanized, reduce the temperature difference between the upper part and the lower part of the tire, and detect whether the nitrogen leakage exists or not to cause the performance reduction of the tire.
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
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 in combination with table 1, a nitrogen medium vulcanization method for an all-steel radial tire vulcanization process, the method comprising:
step 1: the embryo is shaped, low-pressure steam is fed, and the time is 60s;
step 2: in the first condensation stage, high-pressure steam is fed and condensed for 45s;
step 3: in the first heating stage, high-pressure steam is fed for 150s;
step 4: in the second condensation stage, high-pressure steam is fed and condensed for 3s;
step 5: in the second heating stage, high-pressure steam is fed for 150s;
step 6: in the third condensation stage, high-pressure steam is fed and condensed for 3s;
step 7: in the third heating stage, high-pressure steam is fed for 150s;
step 8: the first nitrogen charging stage is carried out, and nitrogen pressure maintaining is carried out for 22s;
step 9: in the fourth condensation discharge stage, introducing nitrogen, nitrogen condensation discharge and nitrogen pressure maintaining are performed simultaneously for 12s;
step 10: the second nitrogen feeding stage is carried out, and nitrogen pressure maintaining is carried out for 300s;
step 11: in the fifth condensation discharging stage, nitrogen is introduced, nitrogen condensation discharging and nitrogen pressure maintaining are simultaneously carried out for 3s;
step 12: a third nitrogen-introducing stage, and performing nitrogen pressure maintaining for 1380s-3120s;
step 13: the nitrogen is kept pressure, the nitrogen stops entering in the step, the pressure value change of the kept pressure nitrogen in a pipeline is detected, whether leakage occurs in the early-stage sulfur nitrogen or not is judged, when the pressure minus the pressure at the beginning of the step is more than 0.2Mpa at the end, the leakage occurs in the nitrogen, and the time is 120s;
step 14: introducing nitrogen, maintaining pressure of the nitrogen, and setting the time of step 14 to be 60s when no leakage is detected in step 13, and setting the time of detecting leakage to be 120-360 s if the leakage occurs;
step 15: nitrogen recovery is carried out for 30s;
in the steps, the main row is kept open;
step 16: exhausting the gas and maintaining for 15s;
step 17: vacuum was applied for 15 s.
TABLE 1 method step Table of one embodiment
Referring to Table 2, the pressure of the low pressure steam was 1.0.+ -. 0.1MPa. 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 coagulation. 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 ℃. The temperature difference between the left die and the right die in the stage of pressure maintaining of nitrogen is less than or equal to 7 ℃. When nitrogen is recovered, the pressure is kept to be less than or equal to 0.7Mpa. The pressure in the main pipeline is less than or equal to 0.2Mpa.
TABLE 2 temperature and pressure conditions in the respective steps
The method of the invention ensures that the nitrogen process is heated uniformly at the whole temperature and is far higher than the hot water process, the running durability of the nitrogen process is also superior to that of the hot water process through the mileage pairs of a laboratory, and meanwhile, the detection steps in the steps can prevent the generation of batch quality problems caused by nitrogen leakage which cannot be detected in other factories.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (9)
1. The nitrogen medium vulcanization method for the vulcanizing process of the all-steel radial tire is characterized by comprising the following steps of:
step 1: the embryo is shaped, low-pressure steam is fed, and the time is 60s;
step 2: in the first condensation stage, high-pressure steam is fed and condensed for 45s;
step 3: in the first heating stage, high-pressure steam is fed for 150s;
step 4: in the second condensation stage, high-pressure steam is fed and condensed for 3s;
step 5: in the second heating stage, high-pressure steam is fed for 150s;
step 6: in the third condensation stage, high-pressure steam is fed and condensed for 3s;
step 7: in the third heating stage, high-pressure steam is fed for 150s;
step 8: the first nitrogen charging stage is carried out, and nitrogen pressure maintaining is carried out for 22s;
step 9: in the fourth condensation discharge stage, introducing nitrogen, nitrogen condensation discharge and nitrogen pressure maintaining are performed simultaneously for 12s;
step 10: the second nitrogen feeding stage is carried out, and nitrogen pressure maintaining is carried out for 300s;
step 11: in the fifth condensation discharging stage, nitrogen is introduced, nitrogen condensation discharging and nitrogen pressure maintaining are simultaneously carried out for 3s;
step 12: a third nitrogen-introducing stage, and performing nitrogen pressure maintaining for 1380s-3120s;
step 13: the nitrogen is kept pressure, the nitrogen stops entering in the step, the pressure value change of the kept pressure nitrogen in a pipeline is detected, whether leakage occurs in the early-stage sulfur nitrogen or not is judged, when the pressure minus the pressure at the beginning of the step is more than 0.2Mpa at the end, the leakage occurs in the nitrogen, and the time is 120s;
step 14: introducing nitrogen, maintaining pressure of the nitrogen, and setting the time of step 14 to be 60s when no leakage is detected in step 13, and setting the time of detecting leakage to be 120-360 s if the leakage occurs;
step 15: nitrogen recovery is carried out for 30s;
in the steps, the main row is kept open;
step 16: exhausting the gas and maintaining for 15s;
step 17: vacuum was applied for 15 s.
2. The method of claim 1, wherein the low pressure steam has a pressure of 1.0 ± 0.1Mpa.
3. The method of claim 1, wherein the high pressure steam has a pressure of 1.4±0.1Mpa and a temperature of 198±3 ℃.
4. The method according to claim 1, wherein the pressure of the nitrogen is 2.45-2.65 mpa.
5. The method of claim 1, wherein said dephlegmator reduces the pressure to a value
0.1-0.3 MPa.
6. The method of claim 1, wherein the left and right die temperature differences in step 5 and step 7 are less than or equal to 3 ℃.
7. The method of claim 1, wherein the temperature difference between the left and right dies in the stage comprising maintaining the pressure of nitrogen is less than or equal to 7 ℃.
8. The method according to claim 1, wherein the pressure is maintained at 0.7Mpa or less during nitrogen recovery.
9. The method of claim 1, wherein the pressure in the main line is less than or equal to 0.2Mpa.
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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
|---|---|
| CN114393752A CN114393752A (en) | 2022-04-26 |
| CN114393752B true CN114393752B (en) | 2023-12-29 |
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|---|---|---|---|---|
| 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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| CN114393752A (en) | 2022-04-26 |
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