Method for matching vulcanization parameters of each rubber component of a passenger vehicle tire

Abstract

The present application relates to a kind of passenger car tire each rubber component vulcanization parameter matching method, belong to tire vulcanization technical field.Use temperature meter, first in each rubber component of representative specification tire blank embeds thermocouple wire;Second, the tire blank of above-mentioned has buried line is placed in curing press and is vulcanized, and temperature is measured using temperature meter, and temperature data in the whole vulcanization process is collected;Finally, according to the temperature data collected using Arrhenius equation, the equivalent vulcanization time of each rubber component is calculated, and the equivalent vulcanization time of each rubber component and the inherent safety point of each rubber material are used to calculate the vulcanization parameter t90 of each rubber material matching, that is, the best matching vulcanization parameter that each rubber material reaches safety point simultaneously.Through this method, the vulcanization parameter of each rubber component can be calculated, and the safety vulcanization degree of each rubber component is reached, so that the physical and mechanical properties of each component of tire are synchronized to the best, and the service life of tire is improved.

Description

Technical Field

[0001] This invention relates to the field of tire vulcanization technology, specifically a method for matching the vulcanization parameters of various rubber components in a passenger car tire. Background Technology

[0002] As is well known, during the vulcanization process, a vulcanizing bladder needs to be inserted into the tire carcass. Saturated steam provides the temperature required for vulcanization, and nitrogen provides the pressure. The bladder then transfers temperature and pressure to the inner surface of the tire carcass, while the outer surface receives heat from the vulcanizing mold. The vulcanization process is completed after a certain period of time. The inner and outer surfaces of the tire carcass are in contact with the bladder and the vulcanizing mold, respectively. The inner and outer surfaces of the tire carcass have the highest temperatures, and as the vulcanization time increases, the temperature gradually transfers from the inner and outer surfaces to the interior of the tire carcass. Because the thickness of the various rubber components in a tire is inconsistent, the heating process of the rubber compounds in each component is also asynchronous, inevitably resulting in different degrees of vulcanization for each component. Tire manufacturers' formulation engineers design vulcanization parameters for different rubber components based on experience, without designing the vulcanization system for each component based on the actual heating process of the vulcanized tire carcass. Because the heating process and vulcanization system of the rubber compounds in each component are different, in order to ensure that the slowest part of the tire carcass reaches safe vulcanization, the vulcanization time is artificially increased. This will inevitably cause other rubber components to be vulcanized to an excessive degree, thereby leading to a decline in the performance of the rubber components and a shortening of the tire's service life. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides a method for matching the vulcanization parameters of various rubber components of a passenger car tire, wherein the vulcanization parameters of different rubber components are designed based on the actual heating process of the vulcanized tire carcass.

[0004] The technical solution adopted by this invention to solve its technical problem is: a method for matching the vulcanization parameters of various rubber components of a passenger car tire, using a thermometer. The method is characterized by first embedding thermocouple wires in each rubber component of a tire blank representing a specific specification; secondly, placing the tire blank with embedded wires into a vulcanizing machine for vulcanization, and using a thermometer to measure the temperature and collect temperature data throughout the vulcanization process; finally, calculating the equivalent vulcanization time of each rubber component using the Anius equation based on the collected temperature data, and then dividing the equivalent vulcanization time of each rubber component by the inherent safety point of each rubber compound to calculate the matching vulcanization parameter t90 for each rubber compound, which is the optimal matching vulcanization parameter for each rubber compound to simultaneously reach the safety point.

[0005] The beneficial effect of this invention is that the vulcanization parameters for the rubber compounds of each rubber component to reach a safe vulcanization level simultaneously can be calculated through this method, so that the physical and mechanical properties of each tire component can reach the optimal level simultaneously, thereby improving the service life of the tire. Attached Figure Description

[0006] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0007] Figure 1 A schematic diagram of the location of the embedded thread in the embryo of the present invention.

[0008] In the diagram: 1. Lower tire opening; 2. Lower tire side; 3. Lower lateral wing; 4. Lower tire shoulder; 5. Lower tire crown; 6. Lower tire lining. Detailed Implementation

[0009] This embodiment uses a passenger car tire 215 / 55R16 as a representative specification for illustration. Since the vulcanizing medium for passenger car tires is steam and nitrogen, the temperature of the lower mold is lower than that of the upper mold. Therefore, the thermocouple wires are embedded in the lower mold of the tire blank.

[0010] Step 1: Implanting thermocouple wires in the embryo like Figure 1 As shown, according to the location of the embedded wires in the embryo, one thermocouple wire is embedded in each of the following locations: lower inlet 1, lower side 2, lower wing 3, lower shoulder 4, lower crown 5, and lower inner part 6, for a total of six wires. 1. Lower part: The rubber material is triangular; 2. Lower tire sidewall area: The rubber composition consists of tire body rubber, bead rubber, and sidewall rubber; 3. Lower wing section: The adhesive material is wing adhesive; 4. Lower shoulder area: The rubber compound consists of base rubber, crown rubber, and belt rubber; 5. Lower tire crown area: The rubber compound is tire crown rubber; 6. Lower tire inner part: The rubber material is airtight rubber and bonding rubber.

[0011] Step 2: Vulcanizing the embryo and collecting data The tire blank is loaded into the vulcanizing machine, and the thermocouple wires are connected to the temperature measuring instrument; the mold is closed to vulcanize the tire and temperature data is collected. As shown in Table 1 Temperature measurement time Triangle rubber Sidewall Zikoujiao tire body rubber Side wing glue Base adhesive Crown band glue Belt adhesive Crown rubber Adhesive airtight adhesive 0:00:10 66.3 55.3 55.3 55.3 38.2 38.2 38.2 38.2 43.7 55.8 55.8 0:00:20 71.4 68.7 68.7 68.7 41.5 41.5 41.5 41.5 50.2 59.8 59.8 0:00:30 75.7 78.8 78.8 78.8 47.1 47.1 47.1 47.1 57.1 66 66 0:00:40 79.7 87.4 87.4 87.4 51.4 51.4 51.4 51.4 64.4 73.2 73.2 0:00:50 82.9 93.7 93.7 93.7 55.6 55.6 55.6 55.6 70.8 79.4 79.4 0:01:00 86.1 99 99 99 60.4 60.4 60.4 60.4 77 85.5 85.5 0:01:10 89 103.4 103.4 103.4 65.1 65.1 65.1 65.1 82.7 91.2 91.2 0:01:20 91.8 107.3 107.3 107.3 70.1 70.1 70.1 70.1 88.1 96.7 96.7 0:01:30 94.6 110.6 110.6 110.6 74.8 74.8 74.8 74.8 92.9 101.9 101.9 0:01:40 97 113.3 113.3 113.3 79.1 79.1 79.1 79.1 96.9 106.5 106.5 0:01:50 99.6 115.8 115.8 115.8 83.6 83.6 83.6 83.6 101 110.9 110.9 0:02:00 102 118.1 118.1 118.1 87.8 87.8 87.8 87.8 104.6 115.1 115.1 0:02:10 104.4 120.3 120.3 120.3 91.9 91.9 91.9 91.9 108.1 119.2 119.2 0:02:20 106.8 122.4 122.4 122.4 96 96 96 96 111.4 123.3 123.3 0:02:30 109.1 124.2 124.2 124.2 99.6 99.6 99.6 99.6 114.3 126.6 126.6 0:02:40 111.4 126 126 126 103.4 103.4 103.4 103.4 117.2 130 130 0:02:50 113.3 127.4 127.4 127.4 106.4 106.4 106.4 106.4 119.6 132.6 132.6 0:03:00 115.4 129 129 129 109.6 109.6 109.6 109.6 122.3 135.3 135.3 0:03:10 117.4 130.3 130.3 130.3 112.6 112.6 112.6 112.6 124.6 137.7 137.7 0:03:20 119.4 131.8 131.8 131.8 115.6 115.6 115.6 115.6 126.9 140 140 0:03:30 121.3 133.1 133.1 133.1 118.5 118.5 118.5 118.5 129 142.2 142.2 0:03:40 122.9 134.3 134.3 134.3 120.9 120.9 120.9 120.9 130.8 144.2 144.2 0:03:50 124.8 135.8 135.8 135.8 123.6 123.6 123.6 123.6 132.9 146.2 146.2 0:04:00 126.3 136.8 136.8 136.8 125.6 125.6 125.6 125.6 134.4 147.8 147.8 0:04:10 127.9 137.9 137.9 137.9 127.9 127.9 127.9 127.9 136.2 149.4 149.4 0:04:20 129.5 139 139 139 130 130 130 130 137.8 151.1 151.1 0:04:30 130.9 140.2 140.2 140.2 131.8 131.8 131.8 131.8 139.3 152.5 152.5 0:04:40 132.3 141.1 141.1 141.1 133.6 133.6 133.6 133.6 140.6 153.8 153.8 0:04:50 133.6 142.2 142.2 142.2 135.4 135.4 135.4 135.4 142 155 155 0:05:00 134.9 143.1 143.1 143.1 137 137 137 137 143.3 156.3 156.3 0:05:10 136.2 144.1 144.1 144.1 138.6 138.6 138.6 138.6 144.5 157.5 157.5 0:05:20 137.2 144.9 144.9 144.9 139.9 139.9 139.9 139.9 145.5 158.6 158.6 0:05:30 138.5 145.8 145.8 145.8 141.4 141.4 141.4 141.4 146.6 159.7 159.7 0:05:40 139.6 146.6 146.6 146.6 142.8 142.8 142.8 142.8 147.7 160.7 160.7 0:05:50 140.6 147.3 147.3 147.3 144 144 144 144 148.6 161.6 161.6 0:06:00 141.6 148.1 148.1 148.1 145.3 145.3 145.3 145.3 149.5 162.6 162.6 0:06:10 142.6 148.8 148.8 148.8 146.4 146.4 146.4 146.4 150.3 163.4 163.4 0:06:20 143.6 149.5 149.5 149.5 147.5 147.5 147.5 147.5 151.2 164.3 164.3 0:06:30 144.5 150.2 150.2 150.2 148.6 148.6 148.6 148.6 152 165.1 165.1 0:06:40 145.3 150.8 150.8 150.8 149.5 149.5 149.5 149.5 152.7 165.8 165.8 0:06:50 146.2 151.4 151.4 151.4 150.5 150.5 150.5 150.5 153.5 166.5 166.5 0:07:00 147.2 152.2 152.2 152.2 151.6 151.6 151.6 151.6 154.2 167.4 167.4 0:07:10 147.9 152.7 152.7 152.7 152.4 152.4 152.4 152.4 154.8 167.9 167.9 0:07:20 148.7 153.4 153.4 153.4 153.2 153.2 153.2 153.2 155.4 168.5 168.5 0:07:30 149.5 154 154 154 154 154 154 154 156.2 169 169 0:07:40 150.2 154.5 154.5 154.5 154.6 154.6 154.6 154.6 156.7 169.6 169.6 0:07:50 150.9 155 155 155 155.4 155.4 155.4 155.4 157.4 170.1 170.1 0:08:00 151.5 155.5 155.5 155.5 156.1 156.1 156.1 156.1 157.8 170.5 170.5 0:08:10 152.1 156 156 156 156.7 156.7 156.7 156.7 158.4 170.9 170.9 0:08:20 152.8 156.5 156.5 156.5 157.4 157.4 157.4 157.4 158.9 171.3 171.3 0:08:30 153.3 157 157 157 158 158 158 158 159.4 171.7 171.7 0:08:40 154 157.4 157.4 157.4 158.6 158.6 158.6 158.6 159.9 172.1 172.1 0:08:50 154.5 157.9 157.9 157.9 159.2 159.2 159.2 159.2 160.4 172.4 172.4 0:09:00 155 158.3 158.3 158.3 159.8 159.8 159.8 159.8 160.7 172.7 172.7 0:09:10 155.6 158.7 158.7 158.7 160.3 160.3 160.3 160.3 161.2 173 173 0:09:20 156 159.1 159.1 159.1 160.8 160.8 160.8 160.8 161.7 173.3 173.3 0:09:30 156.5 159.5 159.5 159.5 161.3 161.3 161.3 161.3 162.1 173.4 173.4 0:09:40 157.1 159.9 159.9 159.9 161.9 161.9 161.9 161.9 162.5 173.7 173.7 0:09:50 157.4 160.3 160.3 160.3 162.4 162.4 162.4 162.4 162.9 173.9 173.9 0:10:00 157.9 160.7 160.7 160.7 162.9 162.9 162.9 162.9 163.3 174 174 0:10:10 158.4 161 161 161 163.4 163.4 163.4 163.4 163.8 174.3 174.3 0:10:20 158.8 161.4 161.4 161.4 163.9 163.9 163.9 163.9 164.1 174.5 174.5 0:10:30 159.2 161.7 161.7 161.7 164.3 164.3 164.3 164.3 164.4 174.6 174.6 0:10:40 159.6 162 162 162 164.8 164.8 164.8 164.8 164.7 174.9 174.9 0:10:50 160 162.3 162.3 162.3 165.2 165.2 165.2 165.2 164.9 175.1 175.1 0:11:00 160.4 162.6 162.6 162.6 165.5 165.5 165.5 165.5 165.2 175.3 175.3 0:11:10 160.7 162.8 162.8 162.8 165.8 165.8 165.8 165.8 165.4 175.4 175.4 0:11:20 161 163 163 163 166.2 166.2 166.2 166.2 165.5 175.3 175.3 0:11:30 161.3 163.2 163.2 163.2 166.4 166.4 166.4 166.4 165.8 174.8 174.8 0:11:40 161.6 163.4 163.4 163.4 166.5 166.5 166.5 166.5 165.8 173.7 173.7 0:11:50 161.8 163.8 163.8 163.8 166.5 166.5 166.5 166.5 166 172.5 172.5 0:12:00 162 163.8 163.8 163.8 166 166 166 166 166 170.8 170.8 0:12:10 162 163.8 163.8 163.8 166 166 166 166 166 170.8 170.8 0:12:20 162 163.8 163.8 163.8 166 166 166 166 166 170.8 170.8 0:12:30 162 163.8 163.8 163.8 166 166 166 166 166 170.8 170.8 0:12:40 162 163.8 163.8 163.8 166 166 166 166 166 170.8 170.8 0:12:50 162 163.8 163.8 163.8 166 166 166 166 166 170.8 170.8 0:13:00 162 163.8 163.8 163.8 166 166 166 166 166 170.8 170.8 0:13:10 162.2 164 164 164 166.2 166.2 166.2 166.2 165.9 169.4 169.4 0:13:20 162.4 164.2 164.2 164.2 166.3 166.3 166.3 166.3 165.6 169.7 169.7 0:13:30 162.6 164.2 164.2 164.2 166.4 166.4 166.4 166.4 165.2 169.8 169.8 0:13:40 162.8 164 164 164 166.3 166.3 166.3 166.3 164.6 168.5 168.5 0:13:50 162.6 163.7 163.7 163.7 166.2 166.2 166.2 166.2 164 167.8 167.8 0:14:00 162.3 163 163 163 166 166 166 166 163 166.3 166.3 0:14:10 161.9 162.2 162.2 162.2 165.7 165.7 165.7 165.7 162 164.9 164.9 0:14:20 162 161.4 161.4 161.4 165.2 165.2 165.2 165.2 161 163.1 163.1 0:14:30 161.6 160.7 160.7 160.7 165.1 165.1 165.1 165.1 160.1 161.9 161.9 0:14:40 160.8 158.1 158.1 158.1 165.2 165.2 165.2 165.2 159 161.2 161.2 0:14:50 160.1 155.1 155.1 155.1 164.4 164.4 164.4 164.4 158 160.4 160.4 0:15:00 159.5 152.6 152.6 152.6 163.6 163.6 163.6 163.6 157 159.7 159.7 0:15:10 158.8 150.6 150.6 150.6 162.7 162.7 162.7 162.7 155.8 158.5 158.5 0:15:20 157.9 149 149 149 161.7 161.7 161.7 161.7 154.3 156.1 156.1 0:15:30 157.3 147.6 147.6 147.6 160.7 160.7 160.7 160.7 153.2 155.4 155.4 0:15:40 156.6 146.4 146.4 146.4 159.8 159.8 159.8 159.8 152.1 154.6 154.6 0:15:50 156 145.4 145.4 145.4 158.6 158.6 158.6 158.6 151 154 154 0:16:00 155.2 144.4 144.4 144.4 157.4 157.4 157.4 157.4 149.8 153.4 153.4 0:16:10 154.6 143.6 143.6 143.6 156.4 156.4 156.4 156.4 148.6 152.5 152.5 0:16:20 154 142.8 142.8 142.8 155.3 155.3 155.3 155.3 147.4 151.4 151.4 0:16:30 153.4 142.1 142.1 142.1 154.1 154.1 154.1 154.1 146.2 150.2 150.2 0:16:40 152.8 141.4 141.4 141.4 153 153 153 153 144.9 149.5 149.5 0:16:50 152.1 140.6 140.6 140.6 151.8 151.8 151.8 151.8 143.5 148.8 148.8 0:17:00 151.6 140.1 140.1 140.1 150.8 150.8 150.8 150.8 142.5 147.7 147.7 0:17:10 151 139.5 139.5 139.5 149.8 149.8 149.8 149.8 141.4 146.6 146.6 0:17:20 150.4 139 139 139 148.7 148.7 148.7 148.7 140.4 145.6 145.6 0:17:30 150 138.4 138.4 138.4 147.6 147.6 147.6 147.6 139.5 144.6 144.6 0:17:40 149.3 137.8 137.8 137.8 146.5 146.5 146.5 146.5 138.5 143.8 143.8 0:17:50 148.8 137.3 137.3 137.3 145.4 145.4 145.4 145.4 137.4 142.3 142.3 0:18:00 148.1 136.7 136.7 136.7 144.4 144.4 144.4 144.4 136.6 141.2 141.2 0:18:10 147.6 136.2 136.2 136.2 143.4 143.4 143.4 143.4 135.6 140.2 140.2 0:18:20 146.8 135.6 135.6 135.6 142.2 142.2 142.2 142.2 134.6 139.3 139.3 0:18:30 146.1 134.9 134.9 134.9 141.1 141.1 141.1 141.1 133.5 138.6 138.6 0:18:40 145.4 134.3 134.3 134.3 139.9 139.9 139.9 139.9 132.5 138.1 138.1 0:18:50 144.5 133.7 133.7 133.7 138.8 138.8 138.8 138.8 131.4 137.5 137.5 0:19:00 144 133.1 133.1 133.1 137.9 137.9 137.9 137.9 130.6 136.6 136.6 0:19:10 143.3 132.6 132.6 132.6 136.9 136.9 136.9 136.9 129.7 135.6 135.6 0:19:20 142.6 131.9 131.9 131.9 135.8 135.8 135.8 135.8 128.6 134.2 134.2 0:19:30 141.9 131.3 131.3 131.3 134.8 134.8 134.8 134.8 127.6 133.1 133.1 0:19:40 141.2 130.7 130.7 130.7 133.8 133.8 133.8 133.8 126.7 132.2 132.2 0:19:50 140.4 130 130 130 132.7 132.7 132.7 132.7 125.5 130.5 130.5 0:20:00 139.3 129.2 129.2 129.2 131.4 131.4 131.4 131.4 124 128.7 128.7 0:20:10 138.7 128.6 128.6 128.6 130.5 130.5 130.5 130.5 123.3 128.2 128.2 0:20:20 137.9 128 128 128 129.4 129.4 129.4 129.4 122.4 127.5 127.5 0:20:30 137 127.2 127.2 127.2 128.3 128.3 128.3 128.3 121.4 126.7 126.7 0:20:40 136 126.5 126.5 126.5 127.1 127.1 127.1 127.1 120.3 126 126 0:20:50 135.1 125.8 125.8 125.8 126.2 126.2 126.2 126.2 119.2 125.2 125.2 0:21:00 134 125 125 125 125.1 125.1 125.1 125.1 118 124.5 124.5 0:21:10 132.9 124.2 124.2 124.2 123.9 123.9 123.9 123.9 116.9 123.2 123.2 0:21:20 132.1 123.4 123.4 123.4 123 123 123 123 116.1 122.2 122.2 0:21:30 131.2 122.8 122.8 122.8 122 122 122 122 115 120.6 120.6 0:21:40 130.3 122 122 122 120.9 120.9 120.9 120.9 114 119.7 119.7 0:21:50 129.5 121.3 121.3 121.3 119.8 119.8 119.8 119.8 113 119.5 119.5 0:22:00 128.7 120.6 120.6 120.6 118.8 118.8 118.8 118.8 112.3 119 119 Step 3: Calculate the equivalent vulcanization time for each rubber component. Based on the collected temperature data (as shown in Table 1) and the initial t90 of each rubber compound, the equivalent vulcanization time of each rubber compound was calculated using the Anius equation. The calculation used the formula τ / τ0=e E / R{(t-150) / [(t+273)×（273+150）]} Where: τ: vulcanization time at temperature t, 10 seconds. τ0: Equivalent vulcanization time at 150℃ t: Actual measured temperature (°C) R: gas constant, R = 0.0083143 kJ / mol·kJ E: Activation energy of sulfidation reaction (kJ / mol) The formula for calculating the safety level of each rubber compound is: the equivalent vulcanization time of each rubber compound divided by the original t90 of each rubber compound.

[0012] activation energy 101.1 94.1 77.1 94.6 94.1 85.1 88.1 88.1 88.1 88.1 101.9

[0013] The table above shows that the safety level of cord rubber, crown rubber, bonding rubber, and airtight rubber after vulcanization is greater than the safety point of the rubber compound. The vulcanization parameter t90 of these four types of rubber compounds needs to be adjusted accordingly. The other seven types of rubber compounds—triangle rubber, sidewall rubber, bead rubber, wing rubber, base rubber, belt rubber, and tread rubber—have equivalent vulcanization times that are exactly equal to the safety points of their respective rubber compounds, so no adjustment to the vulcanization system is required.

[0014] Step 4: Rematch the vulcanization parameters of the four rubber compounds. Based on the equivalent vulcanization times of the four rubber components in the table above, and using the inherent safety point parameters of each rubber component, the vulcanization parameter t90 matching the four rubber components is calculated. The formula for calculating the vulcanization parameter t90 matching each rubber component is: the equivalent vulcanization time of each rubber component divided by the safety point of each rubber component.

[0015]

[0016] Step 5: Adjust the vulcanization system in the rubber compound formulations of the four types of rubber components. Based on the vulcanization parameters t90 rematched for the four rubber compounds, the vulcanization systems of the cord rubber, crown rubber, bonding rubber, and airtight rubber were adjusted respectively, reducing the amount of sulfur and accelerator to make them conform to the matched vulcanization parameters t90.

[0017]

[0018] Step 6: Recalculate the safety level of each adhesive component after adjustment. Based on the adjusted vulcanization parameters t90, the equivalent vulcanization time and safety point were recalculated using the temperature measurement data in Table 1, as shown in the table below. At the end of vulcanization, the equivalent vulcanization time of all rubber components reached the safety point simultaneously.

[0019] .

Claims

1. A method for matching the vulcanization parameters of various rubber components in a passenger car tire, using a thermometer, characterized in that... First, thermocouple wires are embedded in each rubber component of the tire blank representing the specified specifications. Second, the tire blank with the embedded wires is placed in a vulcanizing machine for vulcanization, and the temperature is measured with a thermometer to collect temperature data throughout the vulcanization process. Finally, based on the collected temperature data, the equivalent vulcanization time of each rubber component is calculated using the Anius equation. Then, by dividing the equivalent vulcanization time of each rubber component by the inherent safety point of each rubber compound, the matching vulcanization parameter t90 of each rubber compound can be calculated, which is the optimal matching vulcanization parameter for each rubber compound to reach the safety point simultaneously.

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