Special rubber raw material vulcanization curve testing device and method

Abstract

The invention discloses a special rubber raw material vulcanization curve testing device and method, and belongs to the technical field of material testing. The sample state analysis unit is used for generating a rubber filling state index; the mold closing pressure evaluation unit is used for generating a mold closing pressure state index; the correlation analysis unit is used for generating a pressure-filling correlation value; the mold closing pressure adjusting module is used for generating a mold closing pressure adjusting value; the mold closing pressure adjusting control module is used for adjusting a pressure value; by monitoring the filling state and the multi-area mold closing pressure of the rubber sample in real time, establishing the pressure-filling dynamic correlation curve, and automatically adjusting the mold closing pressure based on the curve, closed-loop control in the vulcanization test process is realized, so that the rubber sample is ensured to fully fill a cavity, data deviation caused by uneven pressure or insufficient filling is reduced, and the vulcanization test efficiency is improved. And the accuracy of a vulcanization curve test result is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of material testing, and particularly relates to a special rubber raw material vulcanization curve testing device and method. BACKGROUND

[0002] Rubber vulcanization curve testing is an important means to evaluate the vulcanization characteristics of rubber raw materials. By monitoring the changes in parameters such as viscosity and elastic modulus of rubber during the vulcanization process, the optimal vulcanization time and temperature are determined. This test directly affects the performance of rubber products (such as strength and aging resistance) and is widely used in the tire, sealing, and other industries.

[0003] Traditional vulcanization curve testing devices usually use a fixed mold clamping pressure to vulcanize rubber by heating and rotating the mold cavity, and record the changes in torque or displacement.

[0004] However, the traditional device uses a fixed mold clamping pressure, which cannot be adjusted adaptively according to the real-time filling state of the rubber sample, resulting in reduced accuracy of the test results. Moreover, the judgment of filling uniformity and pressure distribution relies on manual experience, which not only is inefficient but also cannot guarantee the consistency of test results, further reducing the accuracy of test results. SUMMARY

[0005] To overcome the shortcomings of the prior art, the present application provides a special rubber raw material vulcanization curve testing device and method, which solves the above problems.

[0006] To achieve the above purpose, the present application realizes the following technical scheme: a special rubber raw material vulcanization curve testing device, comprising a heating shell, further comprising: a testing assembly, disposed in the heating shell, for vulcanization testing of a special rubber sample; a closing assembly, disposed on one side of the heating shell, for forming a test chamber with the testing assembly; a sample state analysis unit for obtaining the filling degree of the special rubber sample in the test chamber and generating a rubber filling state index; a mold clamping pressure evaluation unit based on the rubber filling state index, for obtaining the pressure value of the special rubber sample by the closing assembly and generating a mold clamping pressure state index; a correlation analysis unit for generating a pressure-filling correlation value according to the rubber filling state index and the mold clamping pressure state index; a mold clamping pressure adjustment module based on the correlation between the mold clamping pressure and the sample filling state, for generating a mold clamping pressure adjustment value according to the pressure-filling correlation value; The mold clamping pressure adjustment control module is used for adjusting the pressure value of the special rubber sample caused by the closing assembly according to the mold clamping pressure adjustment value.

[0007] On the basis of the above technical solution, the application further provides the following optional technical solutions. Further technical solutions: the test assembly specifically comprises: The shell is fixedly arranged on one side of the heating shell; The rotor is rotatably arranged on the shell; The driving member is arranged on one side of the rotor, the output end of the driving member is connected with the rotor, and one end of the driving member is fixedly connected with the shell; The outer wall is slidably arranged on one side of the rotor.

[0008] Further technical solutions: the test assembly further comprises: The sliding block is arranged on one side of the outer wall, and the sliding block is connected with the outer wall through the gear rotatably arranged on the shell; the gear is meshingly connected with the outer wall and the sliding block, respectively; The limiting member is fixedly arranged on the shell and is slidably connected with the sliding block; The elastic member is arranged on one side of the sliding block; one end of the elastic member is fixedly connected with the sliding block, and the other end is fixedly connected with the shell.

[0009] Further technical solutions: the closing assembly specifically comprises: The closing control chamber is fixedly arranged on one side of the heating shell; The closing member is slidably arranged on the closing control chamber, and the closing member is slidably connected with the heating shell; The pressurizing shaft is slidably arranged on the closing member.

[0010] Further technical solutions: the sample state evaluation unit specifically comprises: The filling data acquisition module is used for acquiring the filling degree of the special rubber sample in the test chamber and marking it as the chamber filling degree; The filling degree analysis module is used for generating a chamber filling evaluation value according to the chamber filling degree; the chamber filling evaluation value refers to the ratio of the chamber filling degree to the theoretical filling degree; the theoretical filling degree refers to the maximum value of the chamber filling degree.

[0011] Further technical solutions: the mold clamping pressure evaluation unit specifically comprises: The mold clamping pressure data acquisition module is configured to divide the contact surface of the special rubber sample in the closing assembly into a plurality of areas, acquire the pressure value of the special rubber sample in each area of the closing assembly, and mark the pressure value as a mold clamping pressure value. The mold clamping pressure analysis module is configured to generate a mold clamping pressure abnormality degree index, a mold clamping pressure abnormality distribution index, and a mold clamping pressure change index based on all mold clamping pressure values. The mold clamping pressure evaluation module is configured to generate a mold clamping pressure evaluation index based on the mold clamping pressure abnormality degree index, the mold clamping pressure abnormality distribution index, and the mold clamping pressure change index.

[0012] Further technical solutions: the mold clamping pressure analysis module specifically includes: The abnormality degree analysis submodule is configured to generate a mold clamping pressure abnormality degree index based on an abnormal mold clamping pressure value and a standard mold clamping pressure range. The mold clamping pressure abnormality degree index refers to the ratio of the difference between the abnormal mold clamping pressure value and the near end point of the standard mold clamping pressure range to the near end point of the standard mold clamping pressure range. The abnormal mold clamping pressure value refers to the average value of the mold clamping pressure outside the standard mold clamping pressure range. The average value of the mold clamping pressure refers to the average value of all mold clamping pressure values. The standard mold clamping pressure range refers to the mold clamping pressure range under standard working conditions. The abnormality distribution analysis submodule is configured to generate a mold clamping pressure abnormality distribution index based on the number of mold clamping pressure abnormality areas and the total number of areas. The number of mold clamping pressure abnormality areas refers to the number of areas corresponding to all abnormal mold clamping pressure values. The change analysis submodule is configured to generate a mold clamping pressure change index based on a mold clamping pressure change value and a mold clamping pressure change threshold. The mold clamping pressure change index refers to the ratio of the difference between the mold clamping pressure change value and the mold clamping pressure change threshold to the mold clamping pressure change threshold. The mold clamping pressure change value refers to the difference between the current average value of the mold clamping pressure and the average value of the mold clamping pressure in the latest historical period. The mold clamping pressure change threshold refers to the maximum value of the mold clamping pressure change value under standard working conditions.

[0013] Further technical solutions: the correlation analysis unit specifically includes: The coordinate system establishment module is configured to establish a two-dimensional coordinate system with the rubber filling state index as the X-axis and the mold clamping pressure state index as the Y-axis. The historical data analysis module is configured to acquire the rubber filling state index and the mold clamping pressure state index of the historical period, substitute the rubber filling state index and the mold clamping pressure state index of the historical period into the two-dimensional coordinate system, and generate a pressure-filling coordinate point. The historical curve generation module is configured to generate a pressure-filling correlation curve based on the pressure-filling coordinate point. a curve analysis module, configured to generate a curve dispersion index according to the pressure-filling correlation curve and a standard line; the standard line refers to a straight line formed by all corresponding coordinate points; the corresponding coordinate points refer to coordinate points corresponding to the average value of the ratio between the X-axis coordinate value and the Y-axis coordinate value in the coordinate system and the ratio between the X-axis coordinate value and the Y-axis coordinate value of all pressure-filling coordinate points in the pressure-filling correlation curve; the dispersion index refers to the ratio between the dispersion value between the pressure-filling correlation curve and the standard line and a dispersion threshold value; the dispersion value refers to the fluctuation value of the closest distance value between all coordinate points in the pressure-filling correlation curve and the standard line; a correlation judgment module, configured to judge whether the standard line is a correlation line of the rubber filling state index and the mold clamping pressure state index according to the curve dispersion index; a correlation result output module, if the standard line is the correlation line of the rubber filling state index and the mold clamping pressure state index, the correlation result output module is configured to mark the ratio between the X-axis coordinate value and the Y-axis coordinate value in the standard line as a pressure-filling correlation value.

[0014] Further technical solutions: the mold clamping pressure adjustment module specifically comprises: an analysis model establishment submodule, configured to establish a mold clamping pressure adjustment model; an adjustment value output submodule, configured to substitute the pressure-filling correlation value and the current mold clamping pressure value into the mold clamping pressure adjustment model to generate a mold clamping pressure adjustment value; wherein, the expression of the mold clamping pressure adjustment model is: ; In the expression, represents the mold clamping pressure adjustment value, represents the pressure-filling correlation value, represents the current mold clamping pressure value.

[0015] A special rubber raw material vulcanization curve test method, the method comprising the following steps: Prepare a sample and pretreat the special rubber sample; Place the treated special rubber sample on the test assembly; Start the closing assembly to complete the mold clamping operation; Start the heating device in the heating shell to heat and vulcanize the rubber sample according to the predetermined temperature and time; Obtain the filling degree of the special rubber sample in the test chamber to generate a rubber filling state index; Based on the rubber filling state index, obtain the pressure value of the special rubber sample by the closing assembly to generate a mold clamping pressure state index; According to the rubber filling state index and the mold clamping pressure state index, a pressure-filling correlation value is generated; Based on the correlation between the mold clamping pressure and the sample filling state, a mold clamping pressure adjustment value is generated according to the pressure-filling correlation value; According to the mold clamping pressure adjustment value, the pressure value caused by the special rubber sample to the closed assembly is adjusted; The viscosity change of the rubber sample is monitored, and the test data of the rubber in the vulcanization process is recorded to generate a special rubber vulcanization curve.

[0016] The present application provides a special rubber raw material vulcanization curve testing device and method, which has the following advantages compared with the prior art: The present application establishes a pressure-filling dynamic correlation curve by real-time monitoring of the filling state of the rubber sample and the multi-region mold clamping pressure, and automatically adjusts the mold clamping pressure based on the curve, realizes closed-loop control of the vulcanization test process, and ensures that the rubber sample is fully filled in the chamber, reduces the data deviation caused by uneven pressure or insufficient filling, and improves the accuracy of the vulcanization curve test result. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A three-dimensional structural schematic diagram of a special rubber raw material vulcanization curve testing device is provided for the embodiment of the present application.

[0018] Figure 2 A three-dimensional structural cross-sectional view of the test assembly is provided for the embodiment of the present application.

[0019] Figure 3 For Figure 2 The enlarged view at A in the middle.

[0020] Figure 4 A module block diagram of the sample state evaluation unit is provided for the embodiment of the present application.

[0021] Figure 5 A module block diagram of the mold clamping pressure evaluation unit is provided for the embodiment of the present application.

[0022] Figure 6 A module block diagram of the correlation analysis unit is provided for the embodiment of the present application.

[0023] Figure 7 A structural block diagram of the mold clamping pressure adjustment module is provided for the embodiment of the present application.

[0024] Figure 8 A flowchart of a special rubber raw material vulcanization curve testing method is provided for the embodiment of the present application.

[0025] Marked for annotation: 1, heating shell; 2, closing assembly; 3, test assembly; 201, closing piece; 202, pressurizing shaft; 203, closing control chamber; 301, outer shell; 302, rotor; 303, driving piece; 304, outer wall; 305, sliding block; 306, gear; 307, limiting piece; 308, elastic piece. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0027] The specific implementation of the present application is described in detail below in combination with specific embodiments.

[0028] Please refer to Figure 1 A special rubber raw material vulcanization curve testing device is provided for an embodiment of the present application, which comprises a heating shell 1, and further comprises: A test assembly 3 is arranged in the heating shell 1, which is used for vulcanization testing of a special rubber sample; A closing assembly 2 is arranged on one side of the heating shell 1, which is used to form a test chamber with the test assembly 3; A sample state analysis unit is used to obtain the filling degree of the special rubber sample in the test chamber and generate a rubber filling state index; A sample state evaluation module is used to judge the filling state of the special rubber sample in the test chamber according to the rubber filling state index; A mold clamping pressure evaluation unit is used to obtain the pressure value of the special rubber sample caused by the closing assembly 2 and generate a mold clamping pressure state index based on the filling state of the special rubber sample in the test chamber; A mold clamping pressure evaluation module is used to judge whether the mold clamping pressure is normal according to the mold clamping pressure state index; A correlation analysis unit is used to generate a pressure-filling correlation value according to the rubber filling state index and the mold clamping pressure state index; A mold clamping pressure adjustment module is used to generate a mold clamping pressure adjustment value according to the pressure-filling correlation value based on the correlation between the mold clamping pressure and the sample filling state; A mold clamping pressure adjustment control module is used to adjust the pressure value of the special rubber sample caused by the closing assembly 2 according to the mold clamping pressure adjustment value.

[0029] Please refer to Figure 2 As a preferred embodiment of the present application, the test assembly 3 specifically comprises: A housing 301 is fixedly arranged on one side of the heating shell 1. A rotor 302 is rotatably arranged on the housing 301. A driving member 303 is arranged on one side of the rotor 302, the output end of the driving member 303 is connected with the rotor 302, and one end of the driving member 303 is fixedly connected with the housing 301. An outer wall 304 is slidably arranged on one side of the rotor 302. Specifically, after the special rubber sample is fixedly placed on the rotor 302, the closing assembly 2 is controlled to move until the closing assembly 2 is in abutting connection with the special rubber sample; at the same time, the outer wall 304 is moved to abut against the closing assembly 2 to form a test chamber of the special rubber; then the driving member 303 is started to drive the rotor 302 to rotate through the output end of the driving member 303, so as to perform the vulcanization curve test on the special rubber sample. In addition, a closable exhaust structure is arranged on the outer wall 304, which facilitates the removal of excess air after the outer wall 304 and the closing assembly 2 form the test chamber. In this embodiment, the special rubber sample is preheated before the driving member 303 is started to ensure the consistency of the internal temperature of the rubber sample; for example, the special rubber sample is placed in a 25℃ constant temperature box in advance, taken out after a period of time and fixedly placed on the rotor 302; in addition, the heating device arranged in the heating shell 1 heats the special rubber sample when the driving member 303 is started; the heating methods include but are not limited to infrared heating, microwave heating and the like.

[0030] Please refer to Figure 3 As a preferred embodiment of the present application, the test assembly 3 further comprises: A sliding block 305 is arranged on one side of the outer wall 304, and the sliding block 305 is connected with the outer wall 304 through a gear 306 rotatably arranged on the housing 301; the gear 306 is in meshing connection with the outer wall 304 and the sliding block 305 respectively. A limiting member 307 is fixedly arranged on the housing 301 and in sliding connection with the sliding block 305. An elastic member 308 is arranged on one side of the sliding block 305; one end of the elastic member 308 is fixedly connected with the sliding block 305 and the other end is fixedly connected with the housing 301. Specifically, when the closing assembly 2 performs linear motion in the vertical direction, the closing assembly 2 is in contact with the sliding block 305, thereby pushing the sliding block 305 to perform linear motion, the sliding block 305 drives the gear 306 to rotate, the gear 306 drives the outer wall 304 to perform linear motion in the direction opposite to that of the sliding block 305, so as to realize automatic movement of the outer wall 304, thereby forming a test chamber of the special rubber sample; After the vulcanization curve test is completed, when the closing assembly 2 is reset, the pressure applied by the closing assembly 2 to the sliding block 305 gradually weakens, and the elastic member 308 pushes the sliding block 305 to reset due to the elasticity thereof, so that the sliding block 305 drives the outer wall 304 to reset through the gear 306; In the embodiment, when the closing assembly 2 drives the outer wall 304 to move, the special rubber sample can be cut in size when the tapered shape at one end of the outer wall 304 is in contact with the closing assembly 2, thereby improving the consistency of the special rubber sample in multiple vulcanization curve tests.

[0031] Please refer to Figure 1 , as a preferred embodiment of the present application, the closing assembly 2 specifically comprises: a closing control chamber 203, which is fixedly arranged on one side of the heating shell 1; a closing member 201, which is slidingly arranged on the closing control chamber 203, and the closing member 201 is in sliding connection with the heating shell 1; a pressurizing shaft 202, which is slidingly arranged on the closing member 201; Specifically, the closing member 201 is controlled to perform linear motion by the closing control chamber 203 until a test chamber of a special rubber sample is formed with the test assembly 3, and the pressurizing shaft 202 serves to apply pressure to the special rubber sample, so that the special rubber sample fills the test chamber, thereby improving the accuracy of the test result; In addition, when the mold is closed, the pressurizing shaft 202 is in contact with the outer wall 304 in the test assembly 3, thereby forming the test chamber.

[0032] Please refer to Figure 4 , as a preferred embodiment of the present application, the sample state evaluation unit specifically comprises: a filling data acquisition module, which is configured to acquire the filling degree of the special rubber sample in the test chamber and mark it as chamber filling degree; a filling degree analysis module, which is configured to generate a chamber filling evaluation value according to the chamber filling degree; wherein the chamber filling evaluation value refers to the ratio of the chamber filling degree to the theoretical filling degree; the theoretical filling degree refers to the maximum value of the chamber filling degree; It needs to be explained that the filling degree refers to the proportion of the volume of the rubber sample in the test chamber to the volume of the whole chamber; in actual application, when the pressure applied by the closing assembly 2 to the special rubber sample is too small, the test chamber contains air, which does not include the bubbles in the special rubber sample, resulting in a decrease in the filling degree.

[0033] As a preferred embodiment of the present application, the way of judging the filling state of the special rubber sample in the test chamber is specifically: comparing the rubber filling state index with a rubber filling state index threshold value; the rubber filling state index threshold value refers to the minimum value of the rubber filling state index in the special rubber vulcanization curve test process; When the rubber filling state index is less than the rubber filling state index threshold value, it is determined that the filling state of the special rubber sample in the test chamber is abnormal; the smaller the rubber filling state index, the more abnormal the filling state of the special rubber sample in the test chamber; If the rubber filling state index is greater than or equal to the rubber filling state index threshold value, it is determined that the filling state of the special rubber sample in the test chamber is normal; the larger the rubber filling state index, the more normal the filling state of the special rubber sample in the test chamber.

[0034] Please refer to Figure 5 As a preferred embodiment of the present application, the mold clamping pressure evaluation unit specifically comprises: A mold clamping pressure data acquisition module is configured to divide the contact surface of the closing assembly 2 with the special rubber sample into a plurality of regions, acquire the pressure value of the special rubber sample in each region of the closing assembly 2, and mark it as a mold clamping pressure value. It needs to be explained that the pressure value can be acquired by setting a pressure sensor in each region. A mold clamping pressure analysis module is configured to generate a mold clamping pressure abnormality degree index, a mold clamping pressure abnormality distribution index, and a mold clamping pressure change index according to all mold clamping pressure values. A mold clamping pressure evaluation module is configured to generate a mold clamping pressure evaluation index according to the mold clamping pressure abnormality degree index, the mold clamping pressure abnormality distribution index, and the mold clamping pressure change index.

[0035] As a preferred embodiment of the present application, the mold clamping pressure analysis module specifically comprises: The abnormality degree analysis submodule is configured to generate a clamping pressure abnormality degree index according to the abnormal clamping pressure value and the standard clamping pressure range, wherein the clamping pressure abnormality degree index refers to a ratio of a difference between the abnormal clamping pressure value and a near-end point of the standard clamping pressure range to the near-end point of the standard clamping pressure range, the abnormal clamping pressure value refers to a clamping pressure average value outside the standard clamping pressure range, the clamping pressure average value refers to an average value of all clamping pressure values, and the standard clamping pressure range refers to a clamping pressure range under a standard working condition; It should be noted that the near-end point of the standard clamping pressure range refers to a point that is closer to the maximum value of the standard clamping pressure range or the minimum value of the standard clamping pressure range. In addition, the value of the standard clamping pressure range is set by relevant personnel in the field, and the specific method includes expert consultation method, etc. The abnormal distribution analysis submodule is configured to generate a clamping pressure abnormal distribution index according to the number of clamping pressure abnormal regions and the total number of regions, wherein the number of clamping pressure abnormal regions refers to the number of regions corresponding to all abnormal clamping pressure values. The change analysis submodule is configured to generate a clamping pressure change index according to a clamping pressure change value and a clamping pressure change threshold value, wherein the clamping pressure change index refers to a ratio of a difference between the clamping pressure change value and the clamping pressure change threshold value to the clamping pressure change threshold value, the clamping pressure change value refers to a difference between a current clamping pressure average value and a clamping pressure average value of a recent historical period, and the clamping pressure change threshold value refers to a maximum value of the clamping pressure change value under the standard working condition. It should be noted that the standard working condition refers to a condition that does not affect the filling degree of the special rubber sample in the test chamber, and in addition, the instability of the clamping pressure may cause the rubber to be unevenly filled in the test chamber, thereby causing abnormal filling degree, so it is necessary to keep the clamping pressure stable during the test, and the stability refers to that the change range cannot be too large.

[0036] As a preferred embodiment of the present application, the determination of whether the clamping pressure is normal specifically includes: comparing the clamping pressure state index with a clamping pressure state index threshold value; When the clamping pressure state index is less than or equal to the clamping pressure state index threshold value, it is determined that the clamping pressure is in a normal state, and the smaller the clamping pressure state index, the more normal the clamping pressure is, and when the clamping pressure is in the normal state, only relevant personnel need to perform routine observation; When the clamping pressure state index is greater than the clamping pressure state index threshold value, it is determined that the clamping pressure is in an abnormal state; the greater the clamping pressure state index, the more abnormal the clamping pressure; when the clamping pressure is abnormal, it needs to be warned to remind the relevant personnel to find the abnormality; the reminding mode includes but is not limited to voice, light, etc.

[0037] Please refer to Figure 6 , as a preferred embodiment of the present application, the correlation analysis unit specifically comprises: A coordinate system establishing module is configured to establish a two-dimensional coordinate system with the rubber filling state index as the X-axis and the clamping pressure state index as the Y-axis. A historical data analysis module is configured to obtain the rubber filling state index and the clamping pressure state index of a historical period, and substitute the rubber filling state index and the clamping pressure state index of the historical period into the two-dimensional coordinate system to generate pressure-filling coordinate points. It needs to be explained that the values substituted by the X-axis and the Y-axis in the pressure-filling coordinate points are the rubber filling state index and the clamping pressure state index of the same historical period. A historical curve generating module is configured to generate a pressure-filling correlation curve according to the pressure-filling coordinate points. A curve analysis module is configured to generate a curve dispersion index according to the pressure-filling correlation curve and a standard line; the standard line refers to a straight line formed by all corresponding coordinate points; the corresponding coordinate points refer to coordinate points corresponding to the average value of the ratio between the X-axis coordinate value and the Y-axis coordinate value in the pressure-filling correlation curve and the ratio between the X-axis coordinate value and the Y-axis coordinate value of all pressure-filling coordinate points in the pressure-filling correlation curve; the dispersion index refers to the ratio between the dispersion value between the pressure-filling correlation curve and the standard line and a dispersion threshold value; the dispersion value refers to the fluctuation value of the closest distance value between all coordinate points in the pressure-filling correlation curve and the standard line. A correlation judgment module is configured to judge whether the standard line is the correlation line of the rubber filling state index and the clamping pressure state index according to the curve dispersion index. An association result output module is configured to mark the ratio between the X-axis coordinate value and the Y-axis coordinate value in the standard line as a pressure-filling correlation value if the standard line is the correlation line of the rubber filling state index and the clamping pressure state index.

[0038] Please refer to Figure 7 , as a preferred embodiment of the present application, the clamping pressure adjustment module specifically comprises: An analysis model establishing submodule is configured to establish a clamping pressure adjustment model. An adjustment value output submodule is configured to substitute the pressure-filling correlation value and the current clamping pressure value into the clamping pressure adjustment model to generate a clamping pressure adjustment value. The expression of the mold clamping pressure adjustment model is as follows: ; In the expression, represents the mold clamping pressure adjustment value, represents the pressure-filling correlation value, represents the current mold clamping pressure value.

[0039] Referring to Figure 8 The application also provides a special rubber raw material vulcanization curve testing method applied to the special rubber raw material vulcanization curve testing device. S1: Prepare a sample and pretreat the special rubber sample; S2: Place the treated special rubber sample on the testing assembly 3; S3: Start the closing assembly 2 to complete the mold clamping operation; S4: Start the heating device in the heating shell 1 to heat and vulcanize the rubber sample according to the predetermined temperature and time; S5: Obtain the filling degree of the special rubber sample in the testing chamber to generate a rubber filling state index; S6: Obtain the pressure value of the special rubber sample caused by the closing assembly 2 based on the rubber filling state index to generate a mold clamping pressure state index; S7: Generate a pressure-filling correlation value according to the rubber filling state index and the mold clamping pressure state index; S8: Generate a mold clamping pressure adjustment value based on the correlation between the mold clamping pressure and the sample filling state according to the pressure-filling correlation value; S9: Adjust the pressure value of the special rubber sample caused by the closing assembly 2 according to the mold clamping pressure adjustment value; S10: Monitor the viscosity change of the rubber sample and record the testing data of the rubber during the vulcanization process to generate a special rubber vulcanization curve.

[0040] Although embodiments of the application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the application, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1. A special rubber raw material vulcanization curve testing device, comprising a heating shell (1), characterized in that, Also includes: Test component (3), which is disposed inside the heating housing (1) and is used to perform vulcanization tests on special rubber samples; A closing component (2) is disposed on one side of the heating housing (1) and is used to form a test chamber with the test component (3); The sample state analysis unit is used to obtain the filling degree of a special rubber sample in the test chamber and generate a rubber filling state index. The mold clamping pressure assessment unit, based on the rubber filling state index, is used to obtain the pressure value of the closing component (2) on the special rubber sample and generate the mold clamping pressure state index. The correlation analysis unit is used to generate pressure-fill correlation values ​​based on the rubber filler state index and the mold clamping pressure state index. The mold closing pressure adjustment module, based on the correlation between mold closing pressure and sample filling state, is used to generate a mold closing pressure adjustment value according to the pressure-filling correlation value. The mold closing pressure adjustment control module is used to adjust the pressure value exerted by the closing component (2) on the special rubber sample according to the mold closing pressure adjustment value.

2. The special rubber raw material vulcanization curve testing device according to claim 1, characterized in that, The test component (3) specifically includes: The outer casing (301) is fixedly disposed on one side of the heating housing (1); Rotor (302), which is rotatably mounted on the housing (301); A driving component (303) is disposed on one side of the rotor (302), the output end of the driving component (303) is connected to the rotor (302), and one end of the driving component (303) is fixedly connected to the outer casing (301). The outer wall (304) is slidably disposed on one side of the rotor (302).

3. The special rubber raw material vulcanization curve testing device according to claim 2, characterized in that, The test component (3) also includes: A sliding block (305) is disposed on one side of the outer wall (304), and the sliding block (305) is connected to the outer wall (304) by a gear (306) rotatably disposed on the outer shell (301); the gear (306) meshes with the outer wall (304) and the sliding block (305) respectively. A limiting member (307) is fixedly disposed on the outer shell (301) and the limiting member (307) is slidably connected to the sliding block (305); An elastic element (308) is disposed on one side of the sliding block (305); one end of the elastic element (308) is fixedly connected to the sliding block (305) and the other end is fixedly connected to the outer shell (301).

4. The special rubber raw material vulcanization curve testing device according to claim 1, characterized in that, The closing component (2) specifically includes: A closed control chamber (203) is fixedly disposed on one side of the heating housing (1); A closure member (201) is slidably disposed on the closure control chamber (203), and the closure member (201) is slidably connected to the heating housing (1) through it; A pressure shaft (202) is slidably disposed on the closure member (201).

5. The special rubber raw material vulcanization curve testing device according to claim 1, characterized in that, The sample status assessment unit specifically includes: The filling data acquisition module is used to acquire the filling degree of a special rubber sample in the test chamber and mark it as the chamber filling degree; The filling degree analysis module is used to generate a cavity filling evaluation value based on the cavity filling degree; the cavity filling evaluation value refers to the ratio of the cavity filling degree to the theoretical filling degree; the theoretical filling degree refers to the maximum value of the cavity filling degree.

6. The special rubber raw material vulcanization curve testing device according to claim 1, characterized in that, The mold clamping pressure assessment unit specifically includes: The mold clamping pressure data acquisition module is used to divide the contact surface of the closure component (2) with the special rubber sample into several regions, acquire the pressure value of the special rubber sample in each region of the closure component (2), and mark it as the mold clamping pressure value; The mold closing pressure analysis module is used to generate the mold closing pressure anomaly index, the mold closing pressure anomaly distribution index, and the mold closing pressure change index based on all mold closing pressure values. The mold closing pressure evaluation module is used to generate a mold closing pressure evaluation index based on the mold closing pressure anomaly degree index, the mold closing pressure anomaly distribution index, and the mold closing pressure change index.

7. The special rubber raw material vulcanization curve testing device according to claim 6, characterized in that, The mold clamping pressure analysis module specifically includes: The anomaly analysis submodule is used to generate a mold closing pressure anomaly index based on the abnormal mold closing pressure value and the standard mold closing pressure range. The mold closing pressure anomaly index is the ratio of the difference between the abnormal mold closing pressure value and the near end of the standard mold closing pressure range to the near end of the standard mold closing pressure range. The abnormal mold closing pressure value refers to the average mold closing pressure outside the standard mold closing pressure range. The average mold closing pressure refers to the average value of all mold closing pressure values. The standard mold closing pressure range refers to the mold closing pressure range under standard operating conditions. The anomaly distribution analysis submodule is used to generate an anomaly distribution index for mold closing pressure based on the number of abnormal mold closing pressure areas and the total number of areas; the number of abnormal mold closing pressure areas refers to the number of areas corresponding to all abnormal mold closing pressure values. The variation analysis submodule is used to generate a mold closing pressure variation index based on the mold closing pressure variation value and the mold closing pressure variation threshold. The mold closing pressure variation index is the ratio of the difference between the mold closing pressure variation value and the mold closing pressure variation threshold to the mold closing pressure variation threshold. The mold closing pressure variation value is the difference between the current average mold closing pressure and the average mold closing pressure of the most recent historical period. The mold closing pressure variation threshold is the maximum value of the mold closing pressure variation value under standard working conditions.

8. The special rubber raw material vulcanization curve testing device according to claim 1, characterized in that, The correlation analysis unit specifically includes: The coordinate system establishment module is used to establish a two-dimensional coordinate system with the rubber filling state index as the X-axis and the mold closing pressure state index as the Y-axis. The historical data analysis module is used to obtain the rubber filling state index and mold closing pressure state index of historical periods. The historical rubber filling state index and mold closing pressure state index are substituted into the two-dimensional coordinate system to generate pressure-filling coordinate points. The historical curve generation module is used to generate pressure-fill correlation curves based on pressure-fill coordinate points; The curve analysis module generates a curve dispersion index based on the pressure-fill correlation curve and a standard line. The standard line is the straight line formed by all corresponding coordinate points. Corresponding coordinate points are the points in the coordinate system whose ratio of the X-axis to Y-axis coordinate values ​​corresponds to the mean of the ratios of all pressure-fill coordinate points in the pressure-fill correlation curve. The dispersion index is the ratio of the dispersion value between the pressure-fill correlation curve and the standard line to the dispersion threshold. The dispersion value is the fluctuation value of the closest distance between all coordinate points in the pressure-fill correlation curve and the standard line. The correlation judgment module is used to determine whether the standard line is a correlation line between the rubber filling state index and the mold closing pressure state index based on the curve dispersion index. If the standard line is a correlation line between the rubber filling state index and the mold closing pressure state index, the correlation result output module is used to mark the ratio of the X-axis coordinate value to the Y-axis coordinate value in the standard line as the pressure-filling correlation value.

9. The special rubber raw material vulcanization curve testing device according to claim 8, characterized in that, The mold clamping pressure adjustment module specifically includes: The analysis model building submodule is used to build a mold closing pressure adjustment model; The adjustment value output submodule is used to substitute the pressure-fill correlation value and the current mold closing pressure value into the mold closing pressure adjustment model to generate the mold closing pressure adjustment value; The expression for the mold clamping pressure adjustment model is as follows: ； In the expression, This indicates the mold clamping pressure adjustment value. This represents the pressure-fill correlation value. This indicates the current mold closing pressure value.

10. A method for testing the vulcanization curve of a special rubber raw material, characterized in that, The method, applied to the vulcanization curve testing apparatus for special rubber raw materials according to any one of claims 1-9, comprises the following steps: Prepare samples and pretreat special rubber samples; The processed special rubber sample is fixedly placed on the test assembly (3); Activate the closing component (2) to complete the mold closing operation; Start the heating device inside the heating housing (1) to heat and vulcanize the rubber sample according to the predetermined temperature and time; The filling degree of a special rubber sample in the test chamber is obtained, and a rubber filling state index is generated. Based on the rubber filling state index, the pressure value of the closing component (2) on the special rubber sample is obtained, and the mold closing pressure state index is generated. Based on the rubber filling state index and the mold closing pressure state index, a pressure-filling correlation value is generated; Based on the correlation between mold closing pressure and sample filling state, a mold closing pressure adjustment value is generated according to the pressure-filling correlation value; Adjust the pressure value exerted by the closing component (2) on the special rubber sample according to the mold clamping pressure adjustment value; Monitor the viscosity changes of rubber samples and record the test data of rubber during the vulcanization process to generate special rubber vulcanization curves.

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