Valuing method for passenger car tire rubber material vulcanization parameters

Abstract

The invention relates to a valuing method for passenger car tire rubber material vulcanization parameters, and belongs to the field of tire vulcanization. The method comprises the following steps: firstly, testing different batches of final mixing rubber materials by using an MDR sulfur change instrument and calculating vulcanization parameter correction values of the final mixing rubber materials of various rubber numbers, collecting vulcanization parameters of the different batches of final mixing rubber materials, and calculating an average value and sigma; secondly, performing calendaring and extrusion on the different batches of final mixed rubber, then sampling, performing testing by using an MDR sulfur change instrument, collecting vulcanization parameters of the different batches of final mixed rubber after calendaring and extrusion, and calculating an average value and sigma; and finally, calculating the difference value of each parameter twice, taking the difference value as the correction value of the vulcanization parameter of the final mixing rubber material of each batch, and formulating the optimal vulcanization time of the tire according to the corrected vulcanization parameter. The measuring method is accurate and reliable, the vulcanization parameters of the rubber material can be truly detected, the optimal vulcanization time can be formulated, the production efficiency is improved, energy waste is avoided, and the comprehensive performance of the tire is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tire vulcanization, in particular to a method for determining the value of tire vulcanization parameters of passenger car tires. BACKGROUND

[0002] It is known that the current passenger car tire enterprises determine the vulcanization speed of the rubber compound, i.e. the vulcanization parameters, by sampling the final rubber compound produced in the mixing workshop, and then testing it using an MDR vulcanization tester. The vulcanization time of the tire is determined according to the vulcanization parameters of various rubber compounds. Because the final rubber compound needs to be calendered and extruded into various rubber parts, this process consumes the vulcanization time of the rubber compound. The various rubber parts are then combined to form a tire blank, and finally the tire blank is vulcanized by a vulcanizing machine to become a useful tire. According to actual verification, it is found that the vulcanization parameter data of the same rubber compound after calendering and extrusion is inconsistent with the data obtained by sampling the final rubber compound. The vulcanization time of the tire determined according to the data obtained by sampling the final rubber compound is longer. In order to ensure the quality and safety of the tire, most tire enterprises determine the vulcanization time of the tire by using the data obtained by sampling the final rubber compound, without calculating the vulcanization time of the tire according to the actual vulcanization speed of the rubber compound after calendering and extrusion, thereby causing over-vulcanization of the tire, reduction of production efficiency, and waste of energy. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the present application provides a method for determining the value of tire vulcanization parameters of passenger cars, which can effectively and accurately determine the vulcanization time of the rubber compound.

[0004] The technical scheme adopted by the present application to solve the technical problem is: a method for determining the value of tire vulcanization parameters of passenger cars, using an MDR vulcanization tester and calculating the vulcanization parameter correction value of the final rubber compound of various rubber compounds, characterized in that: first, the MDR vulcanization tester is used to test different batches of final rubber compounds, collect the vulcanization parameters of different batches of final rubber compounds, and calculate the average value and sigam; second, the above different batches of final rubber compounds are calendered and extruded, sampled, tested using an MDR vulcanization tester, and the vulcanization parameters of different batches of final rubber compounds after calendering and extrusion are collected and the average value and sigam are calculated; finally, the difference between the two times (average value + 3sigam) of each parameter is calculated, and this difference is used as the correction value of the vulcanization parameter of each batch of final rubber compound. The best vulcanization time of the tire can be determined according to the corrected vulcanization parameter.

[0005] The present application has the advantages of accurate and reliable measurement method, which can accurately determine the vulcanization parameters of the rubber compound, determine the best vulcanization time, improve the production efficiency, avoid energy waste, and improve the comprehensive performance of the tire.

[0006] The present application will be further described below with reference to the embodiments. DETAILED DESCRIPTION

[0007] Example 1:

[0008] According to the temperature field distribution of the actual vulcanization of the tire, the vulcanization time of the passenger car tire is formulated based on the vulcanization parameters of the tread rubber, belt rubber and triangular rubber core rubber.

[0009] This embodiment will be described taking the belt rubber as an example:

[0010] In the first step, MDR sulfur variable instrument is used to test the 150-degree sulfur variable instrument of the final twelve batches of belt rubber, and the T10, T50 and T90 vulcanization parameters are shown in Table 1.

[0011] Batch / finishing gum MDR Rheometer T10 MDR Rheometer T50 MDR Rheometer T90 1 5.5 10.34 19.12 2 5.25 10.23 18.37 3 5.39 10.41 18.22 4 5.6 10.7 20.78 5 5.68 10.59 19.14 6 0.75 10.49 18.92 7 6.03 11.00 19.62 8 5.93 11.29 20.67 9 6.1 11.47 20.63 10 5.79 10.63 19.45 11 5.58 10.21 19.25 12 5.49 10.97 20.37

[0012] In the second step, the average value, sigam and average value+3sigam of the data in the first step are calculated, as shown in Table 2.

[0013] Batch / finishing gum MDR Rheometer T10 MDR Rheometer T50 MDR Rheometer T90 Average 5.67 10.69 19.55 sigma 0.25 0.39 0.85 Average + 3 sigma 6.42 11.87 22.09

[0014] In the third step, MDR sulfur variable instrument is used to test the 150-degree sulfur variable instrument of the final twelve batches of belt rubber after rolling, and the T10, T50 and T90 vulcanization parameters are shown in Table 3.

[0015] Batch / after rolling MDR Rheometer T10 MDR Rheometer T50 MDR Rheometer T90 1 5.19 10.19 18.97 2 4.94 10.08 18.22 3 5.08 10.26 18.07 4 5.29 10.55 20.63 5 5.37 10.44 18.99 6 5.44 10.34 18.77 7 5.72 10.85 19.47 8 5.62 11.14 20.52 9 5.79 11.32 20.48 10 5.48 10.48 19.3 11 5.27 10.06 19.1 12 5.18 10.82 20.22

[0016] In the fourth step, the average value, sigam and average value+3sigam of the data in the third step are calculated, as shown in Table 4.

[0017] Batch / after rolling MDR Rheometer T10 MDR Rheometer T50 MDR Rheometer T90 Average 5.36 10.54 19.40 sigma 0.25 0.39 0.85 Average + 3 sigma 6.11 11.72 21.94

[0018] In the fifth step, the correction values of T10, T50 and T90 are calculated according to the values in the second step and the fourth step, which are 0.31 minutes, 0.15 minutes and 0.15 minutes respectively, as shown in Table 5.

[0019] belt compound MDR Rheometer T10 MDR Rheometer T50 MDR Rheometer T90 Corrected value 0.31 0.15 0.15

[0020] In the sixth step, the vulcanization data of the final belt rubber in the past year is collected, and the T10, T50 and T90 are 5.6 minutes, 10.7 minutes and 20.78 minutes respectively. The corrected data are T10: 5.29 minutes, T50: 10.55 minutes and T90: 20.63 minutes.

[0021] In the seventh step, the corrected belt rubber vulcanization data is used as the best vulcanization time of the tire, which can shorten the vulcanization time by 1% to 2% compared with the uncorrected vulcanization data.

[0022] Example 2:

[0023] The present embodiment is described with the example of the tread rubber:

[0024] The first step is to use MDR sulfur variable instrument to test the nine batches of tread final rubber at 150 degrees, T10, T50, T90, and each sulfurization parameter is shown in Table 6.

[0025] Batch / finishing gum MDR Rheometer T10 MDR Rheometer T50 MDR Rheometer T90 1 7.21 10 18.69 2 6.42 8.83 16.2 3 6.29 8.7 15.49 4 6.55 9.31 17.53 5 7.7 10.71 19.52 6 8.23 11.36 20.56 7 8 11.11 20.42 8 7.34 10.22 19.02 9 8.04 11.35 21.72

[0026] The second step is to calculate the average value, sigam, and average value+3sigam of the data of the first step, which is shown in Table 7.

[0027] Average 7.31 10.18 18.79 sigma 0.70 0.98 1.95 Average + 3 sigma 9.41 13.13 24.64

[0028] The third step is to use MDR sulfur variable instrument to test the nine batches of tread final rubber after extrusion at 150 degrees, T10, T50, T90, and each sulfurization parameter is shown in Table 8.

[0029] Batch / after rolling MDR Rheometer T10 MDR Rheometer T50 MDR Rheometer T90 1 7.11 9.84 18.46 2 6.32 8.67 15.97 3 6.19 8.54 15.26 4 6.45 9.15 17.3 5 7.6 10.55 19.29 6 8.13 11.2 20.33 7 7.9 10.95 20.19 8 7.24 10.06 18.79 9 7.94 11.19 21.49

[0030] The fourth step is to calculate the average value, sigam, and average value+3sigam of the data of the third step, which is shown in Table 9.

[0031] Average 7.21 10.02 18.56 sigma 0.70 0.98 1.95 Average + 3 sigma 9.31 12.97 24.41

[0032] The fifth step is to calculate the correction value according to the values of the second step and the fourth step, which is T10: 0.10 minutes, T50: 0.16 minutes, and T90: 0.23 minutes, as shown in Table 10.

[0033] tread compound MDR Rheometer T10 MDR Rheometer T50 MDR Rheometer T90 Corrected value 0.10 0.16 0.23

[0034] The sixth step is to collect the sulfurization data of the tread final rubber in the past year, which is T10: 8.04 minutes, T50: 11.35 minutes, and T90: 21.72 minutes, and the corrected data is T10: 7.94 minutes, T50: 11.19 minutes, and T90: 21.49 minutes.

[0035] The seventh step is to use the corrected tread rubber sulfurization data to determine the best tire sulfurization time, which can shorten the sulfurization time by 1% to 2% compared with the uncorrected sulfurization data.

Claims

1. A method for determining the values of the parameters of the vulcanization of the rubber mixtures for passenger vehicle tires, using an MDR vulcameter and calculating the correction values of the vulcanization parameters of the final rubber mixtures for various rubber compounds, characterized in that, First, use MDR sulfur variable instrument to test different batches of final refining glue, collect different batches of final refining glue vulcanization parameters and calculate the average value and sigam; second, after the final refining glue of the above different batches is rolled and extruded, sampling is carried out, and MDR sulfur variable instrument is used for testing, different batches of final refining glue after rolling and extruding are collected, and the average value and sigam are calculated; finally, the difference value of each parameter is calculated, which is used as the correction value of the vulcanization parameter of each batch of final refining glue, and the best vulcanization time of the tire can be formulated according to the corrected vulcanization parameter.