A method for improving the efficiency of weighing returned rubber

Abstract

The application provides a new method for improving the weighing return rubber efficiency, and belongs to the technical field of rubber mixing, which comprises the following steps: based on the increased rubber weighing machine before the master mixer, weighing the raw rubber and the formula medicine, and calculating the first rubber mixing amount; after the raw rubber is mixed by the master mixer, the master mixed rubber is weighed based on the increased rubber weighing machine after the master mixer, the second rubber mixing amount and the final mixing formula medicine dosage are calculated; the return rubber weighing machine and the rubber weighing machine for the master mixed rubber after the final mixer are controlled according to the final mixing formula medicine dosage, the required return rubber weight and the master mixed rubber weight are weighed at the same time, and then the final mixing is carried out in the final mixer; based on a plurality of groups of data in the whole rubber mixing process, the weight change rule of the raw rubber and the master mixed rubber is obtained, and a calculation model is constructed. The application provides such a new method for improving the weighing return rubber efficiency, which is used for improving the tire dense mixing production continuity, reducing the machine idle running, improving the weighing efficiency and reducing the power consumption per ton of rubber by reducing the interval time of the return rubber weighing.

Description

Technical Field

[0001] This invention relates to the field of rubber compounding technology, and in particular to a method for improving the efficiency of weighing returned rubber. Background Technology

[0002] Currently, tire mixing production has increasingly stringent requirements for low carbon emissions and low power consumption. After years of research, the final mixing process has achieved a balance between mixing efficiency and quality, reducing the cycle time per vehicle to between 90-120 seconds. Previously, improving final mixing efficiency mainly involved increasing mixing speed and reducing time. However, simply increasing speed is not advisable; excessively high speed combined with insufficient mixing time will reduce mixing quality and worsen sulfur dispersion. Further improvements in production efficiency should focus on reducing intervals and increasing production continuity.

[0003] Therefore, the present invention provides a method for improving the efficiency of weighing returned adhesive. Summary of the Invention

[0004] This invention provides a method to improve the efficiency of weighing returned rubber. By adding a returned rubber scale after the existing rubber scale and simultaneously weighing the masterbatch and returned rubber, the efficiency of weighing returned rubber is effectively improved. Furthermore, by determining the weight data and constructing models for different structural positions, the efficiency of weighing returned rubber is further improved.

[0005] This invention provides a method for improving the efficiency of weighing returned adhesive, comprising: Step 1: Based on the rubber weigher added in front of the masterbatch mill, weigh the original rubber compound and the masterbatch formulation reagents, and calculate the first rubber addition amount according to the first rubber addition ratio; Step 2: After the original rubber compound has passed through the masterbatch mill, the masterbatch rubber is weighed using the rubber compound scale added after the masterbatch mill, and the amount of the second blending is calculated according to the second blending ratio. Step 3: Manage the first and second rubber addition amounts, and calculate the dosage of reagents in the final compound based on the weight of the masterbatch rubber. Step 4: Control the added return rubber scale and masterbatch scale after the final mill to weigh the required weight of return rubber and masterbatch rubber according to the dosage of reagents in the final mill formula, and put them into the final mill for final milling. Step 5: Based on several sets of data from the entire rubber mixing process, obtain the weight data of the original rubber compound and masterbatch for different structural positions of the tire, and construct a calculation model for the amount of returned rubber required for different structural positions of the tire.

[0006] Preferably, in step 1, based on the rubber weigher added before the masterbatch mill, the original rubber compound and the masterbatch formulation reagents are weighed, and the first rubber blending amount is calculated according to the first blending ratio, including: The rubber weigher added before using the masterbatch mill is used to weigh the raw rubber and the masterbatch formulation reagents. Based on the application of rubber compounds in different tire structures, the mixing ratio for each application is coded. Based on the aforementioned code, corresponding controllable components are set on the rubber weigher to control the consistent components to perform intelligent weighing before weighing the matched rubber materials. Before using the rubber scale for actual weighing, set the standard accuracy to the corresponding controllable component according to the intended use of the rubber material, and display the weight of the original rubber material and the first amount of rubber added on the display screen of the rubber scale. The weighed raw rubber compound and masterbatch formulation reagents are fed into the masterbatch mixer for masterbatch mixing.

[0007] Preferably, in step 2, before weighing the masterbatch rubber using a rubber scale added after the masterbatch mill, after the original rubber compound has passed through the masterbatch mill, the following steps are included: A timer is installed on one side of the gravity sensing device of the rubber scale added after the master mill to control the timer and the gravity sensing device to work simultaneously. During the historical weighing process of masterbatch rubber, the weight sensing results captured by the gravity sensing device are obtained, and the stabilization time of the initial stable weight is captured based on the historical timing results of the timer. At the same time, it is determined whether there is a jump in the weight sensing result after the stabilization time. If there is no jump, the stabilization time is regarded as one weighing cycle. If it exists, the transition time of the jump is locked based on the timing result of the timer, and the stable time is periodically extended as a secondary weighing cycle; The frequency of the first occurrence of a weighing cycle and the frequency of the second occurrence of a weighing cycle in the historical weighing process are statistically analyzed. Based on the frequency results, the cycle priority is set for the corresponding rubber weigher, and the subsequent masterbatch is weighed. Each rubber material weigher is equipped with a corresponding controllable component, which is used to control the same component to intelligently weigh the matching rubber material according to the set weighing cycle before weighing.

[0008] Preferably, in step 3, the first and second rubber blending amounts are managed, and the dosage of the final compound is calculated based on the weight of the masterbatch, including: During weighing, the controllable components of the rubber scale are operated to obtain intelligent weighing results of the masterbatch; The intelligent weighing results of the raw rubber compound and the corresponding intelligent weighing results of the masterbatch are entered into the computer for management. Based on the weight of the masterbatch, the first amount of rubber added, and the second amount of rubber added, the dosage of the final compound is calculated. The dosage of the final compound is weighed on the rubber scale added after the masterbatch, and the weight and time of the weighing are displayed on the corresponding display screen.

[0009] Preferably, in step 4, the return rubber scale added after the final mill and the rubber compound scale for the masterbatch simultaneously weigh the required weights of the return rubber and masterbatch according to the dosage of the final milling formula, and then feed them into the final mill for final milling, including: The first conveyor belt is positioned between the master mill and the rubber weigher added after the master mill; The second conveyor belt is set between the return rubber bin and the return rubber scale corresponding to the final mill; After the masterbatch is finished, the masterbatch rubber produced from the masterbatch mill outlet is placed on the first conveyor belt; The return glue that meets the first glue content is placed on the second conveyor belt. When the gravity sensors on both conveyor belts receive the signal, the automatic synchronization device is triggered to control the two conveyor belts to run at the same time. Simultaneous weighing of masterbatch and recycled rubber yields intelligent weighing results for both. Compare the first and second amounts of adhesive added, and adjust the amount of returned adhesive based on the second amount of adhesive added as the maximum value until the weight is qualified. Weigh the final formulation of reagents based on the weight of the masterbatch rubber and the weight of the recycled rubber. The weighed recycled rubber, masterbatch rubber, and final mixing formulation reagents are fed into the final mixing machine for final mixing.

[0010] Preferably, before placing the return adhesive that meets the first mixing amount onto the second conveyor belt, the following steps are included: Rapid testing of the compound obtained after final mixing is performed using a quality testing device. Based on the test results, determine whether the rubber compound is qualified; If it passes the test, it will be put into use. If the mixture fails to meet the standards, it will be transported to the return rubber warehouse for management.

[0011] Preferably, in step 5, based on several sets of data from the entire rubber mixing process, the weight data of the original rubber compound and masterbatch for different structural locations of the tire are obtained, and a calculation model for the amount of returned rubber required for different structural locations of the tire is constructed, including: By analyzing and processing several sets of historical data, a table of first weight data of several raw rubber compounds and corresponding masterbatch was obtained. The first weight is classified according to the use of the rubber compound in different tire structures, resulting in the second weight data table; Make a second weight data table corresponding to the same purpose right Add a trend line to the scatter plot and obtain the corresponding correlation coefficient value.

[0012] in, For trend lines about The predicted value, The calculation is the sum of squared residuals. This indicates the x-value representing the starting point of the trend line. This represents the sum of squares of all y-values ​​on the trend line. This indicates the information obtained from the scatter plot regarding... The actual value; If the correlation coefficient is greater than the preset coefficient, then based on the scatter plot... Univariate linear regression model;

[0013] in, These are the parameters to be estimated. It is the standard error value; A univariate linear regression analysis was performed on the univariate linear regression model to obtain the statistical results and variance analysis results of the univariate linear regression model. The goodness of fit and the significance of the regression equation were determined based on the statistical results and the analysis of variance results. test; If the judgment and verification are both reasonable, then the final univariate linear regression prediction model is established. Otherwise, process the standard error value and repeat the analysis steps until the judgment and verification are reasonable; Based on the final univariate linear regression prediction model, the weight of the masterbatch is predicted, and the model prediction value is compared with the actual measurement value to determine the absolute error and relative error between the two. If both the absolute error and the relative error are less than the corresponding preset error, then the final univariate linear regression prediction model is deemed reasonable. Otherwise, a new linear regression model needs to be built; If the correlation coefficient is not greater than the preset coefficient value, then the outliers in the scatter plot are processed and the correlation coefficient is recalculated.

[0014] Preferably, in step 5, the optimization of the return glue weighing time is achieved based on the regression analysis prediction model, including: After weighing the original rubber compound, the first amount of rubber added was calculated, and the predicted weight value of the masterbatch was obtained based on the final univariate linear regression analysis model. The second predicted rubber blending amount is calculated based on the predicted weight value of the masterbatch; During the masterbatch process, the predicted materials are weighed based on the predicted return rubber value and the predicted formulation reagent value. After obtaining the weight of the masterbatch, the predicted weight of the masterbatch is verified. After adjusting the weight of the returned rubber, proceed with the final mixing process. When the predicted values ​​of the prediction model are all within the reasonable error range for actual use, the weighing time of the returned rubber is reduced after weighing the masterbatch rubber and the returned rubber simultaneously.

[0015] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0016] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a flowchart of a method for improving the efficiency of weighing returned adhesive in an embodiment of the present invention; Figure 2 This is an overall structural diagram of the rubber mixing process of the present invention; Figure 3 The diagram illustrates a specific implementation example of the technical solution of this invention. Detailed Implementation

[0018] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] This invention provides a method for improving the efficiency of weighing returned adhesive, such as... Figure 1 As shown, it includes: Step 1: Based on the rubber weigher added in front of the masterbatch mill, weigh the original rubber compound and the masterbatch formulation reagents, and calculate the first rubber addition amount according to the first rubber addition ratio; Step 2: After the original rubber compound has passed through the masterbatch mill, the masterbatch rubber is weighed using the rubber compound scale added after the masterbatch mill, and the amount of the second blending is calculated according to the second blending ratio. Step 3: Manage the first and second rubber addition amounts, and calculate the dosage of reagents in the final compound based on the weight of the masterbatch rubber. Step 4: Control the added return rubber scale and masterbatch scale after the final mill to weigh the required weight of return rubber and masterbatch rubber according to the dosage of reagents in the final mill formula, and put them into the final mill for final milling. Step 5: Based on several sets of data from the entire rubber mixing process, obtain the weight data of the original rubber compound and masterbatch for different structural positions of the tire, and construct a calculation model for the amount of returned rubber required for different structural positions of the tire.

[0020] In this embodiment, a rubber scale added before the masterbatch mill is used to weigh the raw rubber compound and the masterbatch formulation dosage. The scale is equipped with controllable components for different blending ratios. First, the intended use of the raw rubber compound is determined. Based on the performance corresponding to that use, different blending ratios are applied. Before weighing, the operator presses the corresponding button to weigh the raw rubber compound. For example, pressing the [tread extrusion] button corresponds to the tire tread. After obtaining the weight of the raw rubber compound, the result based on the tire tread blending ratio is displayed on the scale's display screen. The display screen is actually set as follows: Figure 3 As shown.

[0021] In this embodiment, the first rubber blending ratio is a fixed value determined according to the use of the original rubber compound in different structures of the tire. For example, the proportion of reclaimed rubber used in the tread extrusion process is no more than 20%, the proportion of reclaimed rubber used in the sidewall rubber, shoulder pad rubber, and triangle rubber extrusion processes is no more than 20%, the proportion of the same type of rubber compound used in the extrusion process is no more than 30%, and for composite tread reclaimed rubber composed of two or more types of rubber compounds, the crown and sidewall must be cut apart and blended separately. For the parts that cannot be completely cut apart, the proportion of reclaimed rubber used is no more than 20%.

[0022] In this embodiment, the first amount of rubber added is the maximum value of the weight of return rubber that can be added to the original rubber compound, calculated based on the first rubber addition ratio.

[0023] In this embodiment, a rubber scale added after masterbatch is equipped with a timer on one side of the gravity sensing device of the rubber scale. The timer is triggered by the gravity sensor to start timing. When the gravity changes, the moment is marked. When the gravity sensor does not detect gravity, the timing stops.

[0024] In this embodiment, the second rubber blending ratio is a fixed value determined according to the use of the original rubber compound in different tire structures. Unlike the first rubber blending ratio, the second rubber blending ratio is calculated based on the masterbatch.

[0025] In this embodiment, the second rubber blending amount is the maximum value of the amount of recycled rubber added in the final refining process, which is calculated from the masterbatch rubber through the second rubber blending ratio.

[0026] In this embodiment, the management of the first and second rubber addition amounts is for the purpose of saving as test data when establishing the subsequent data model, so as to indirectly obtain the predicted weight of the masterbatch rubber.

[0027] In this embodiment, the return rubber scale is set after the return rubber hopper corresponding to the final mill, and it is also equipped with controllable components, a gravity sensor and a timer.

[0028] In this embodiment, simultaneous weighing is achieved through two conveyor belts with the same running time between the masterbatch mill and the rubber scale added after the masterbatch mill, and between the return rubber warehouse and the return rubber scale corresponding to the final mill, as well as an automatic synchronization device on them. The automatic synchronization device is also triggered by the gravity sensor. When both the conveyor belts transporting the masterbatch rubber and the return rubber receive the gravity sensor, the two conveyor belts are triggered to run at the same time, so as to achieve simultaneous weighing of the masterbatch rubber and the return rubber.

[0029] In this embodiment, the weight data is the total weight data of the raw rubber compound and the masterbatch. By establishing a prediction model based on this data, the weight of the masterbatch can be directly predicted by weighing the raw rubber compound, and the predicted return rubber can be weighed in advance.

[0030] In this embodiment, the calculation model is a univariate linear regression prediction model constructed based on the weight data of the original rubber compound and the masterbatch, which is used to predict the weight of the masterbatch based on the weight of the original rubber compound.

[0031] The beneficial effects of the above technical solution are: by improving the rubber weigher and conveyor belt, labor and time costs can be saved. At the same time, by analyzing historical data, the change patterns and calculation models can be obtained, which can further save time costs, improve the continuity of production, and further improve the efficiency of weighing returned rubber.

[0032] This invention provides a method for improving the efficiency of weighing returned adhesive, wherein step 1 includes: The rubber weigher added before using the masterbatch mill is used to weigh the raw rubber and the masterbatch formulation reagents. Based on the application of rubber compounds in different tire structures, the mixing ratio for each application is coded. Based on the aforementioned code, corresponding controllable components are set on the rubber weigher to control the consistent components to perform intelligent weighing before weighing the matched rubber materials. Before using the rubber scale for actual weighing, set the standard accuracy to the corresponding controllable component according to the intended use of the rubber material of the corresponding structure, and display the weight of the original rubber material and the first amount of rubber added on the display screen of the rubber scale. The weighed raw rubber compound and formulated chemicals are fed into the masterbatch mill for masterbatch mixing.

[0033] In this embodiment, the controllable components on the rubber scale are buttons for different rubber blending ratios determined according to different tire structures and uses. The button names are different tire structures and uses, and the corresponding rubber blending ratio is called by pressing the button to perform calculations.

[0034] In this embodiment, intelligent weighing refers to obtaining a series of weighing results about the original rubber material after operating the controllable component, including: the weight of the original rubber material itself, the first amount of rubber added, and the weighing time. The controllable component is a control switch with functional options set on the corresponding scale.

[0035] In this embodiment, since the weight of the materials being weighed is inconsistent, the corresponding standard precision is set according to the weighing unit corresponding to the accuracy of the material weight. If the error precision is 0.1mg when weighing 15g of material, then the precision unit mg is used for weighing. If the error precision is 0.1g when weighing 15kg of rubber, then the precision unit g is used for weighing.

[0036] In this embodiment, after obtaining the weight of the original rubber compound, the required amount of returned rubber and the amount of masterbatch formulation reagents are calculated on the display screen of the rubber compound scale through the first rubber blending ratio. After weighing the corresponding masterbatch formulation reagents, they are put into the masterbatch mill for masterbatch processing.

[0037] The beneficial effects of the above technical solution are: by improving the rubber scale and performing intelligent measurement, the measurement efficiency is improved, the weighing results are more accurate, and the time cost of returning the weighed rubber is indirectly reduced.

[0038] This invention provides a method for improving the efficiency of weighing returned rubber. In step 2, before weighing the masterbatch rubber using a rubber scale added after the masterbatch mill, the method includes: A timer is installed on one side of the gravity sensing device of the rubber scale added after the master mill to control the timer and the gravity sensing device to work simultaneously. During the historical weighing process of masterbatch rubber, the weight sensing results captured by the gravity sensing device are obtained, and the stabilization time of the initial stable weight is captured based on the historical timing results of the timer. At the same time, it is determined whether there is a jump in the weight sensing result after the stabilization time. If there is no jump, the stabilization time is regarded as one weighing cycle. If it exists, the transition time of the jump is locked based on the timing result of the timer, and the stable time is periodically extended as a secondary weighing cycle; The frequency of the first occurrence of a weighing cycle and the frequency of the second occurrence of a weighing cycle in the historical weighing process are statistically analyzed. Based on the frequency results, the cycle priority is set for the corresponding rubber weigher, and the subsequent masterbatch is weighed. Each rubber material weigher is equipped with a corresponding controllable component, which is used to control the same component to intelligently weigh the matching rubber material according to the set weighing cycle before weighing.

[0039] In this embodiment, the weight of the gravity sensing device on the rubber scale is attached to a special elastic beam in a resistance strain gauge manner. After pressure is applied, the elastic body deforms, and its resistance strain gauge also deforms accordingly. The magnitude of the measured weight is converted into a change in the strain, and the resistance value changes, thereby obtaining the weight.

[0040] In this embodiment, the timer is installed on one side of the gravity sensing device and contains a resistor identical to that of the gravity sensing device. When the resistance value on the gravity sensing device changes, the resistance value inside the timer also changes, causing the trigger inside the timer to start working and start timing. When the gravity sensing disappears, the trigger stops working, the timing ends, and the data is stored as weighing history data and displayed on the display screen of the rubber scale.

[0041] In this embodiment, historical weighing data is obtained by using a [memory] button on the rubber scale, which allows users to recall and view historical weighing data. The historical data is intelligently stored in the cloud.

[0042] In this embodiment, the initial stable weight refers to the weight of the material that does not change after 5 seconds when it is weighed, and this weighing time is marked as the stable time.

[0043] In this embodiment, "jump" refers to the fact that the weight of the material changes continuously during the weighing process, that is, the data changes when adjustments are made while weighing the material.

[0044] In this embodiment, a weighing cycle refers to the time taken to weigh the material in one go.

[0045] In this embodiment, the secondary weighing cycle refers to the weighing time plus the adjustment time. The secondary weighing cycle is based on the primary weighing cycle with an additional adjustment time, making it more accurate.

[0046] In this embodiment, the first frequency of occurrence is the frequency of occurrence of the corresponding weighing cycle in the historical weighing data.

[0047] In this embodiment, the second frequency of occurrence is the frequency of occurrence of the corresponding secondary weighing cycle in the historical weighing data.

[0048] In this embodiment, based on the first frequency and the second frequency, if the first frequency is greater than or equal to the second frequency, the cycle priority is set to the corresponding rubber scale as follows: the first weighing cycle takes precedence over the second weighing cycle; otherwise, the second weighing cycle takes precedence over the first weighing cycle.

[0049] The beneficial effects of the above technical solution are: based on the improvements made to the rubber weigher after the masterbatch mill, the calculation procedure for weighing time has been tightened, the accuracy has been improved, and the weighing efficiency has been indirectly improved.

[0050] This invention provides a method for improving the efficiency of weighing returned rubber. In step 3, the first and second rubber addition amounts are managed, and the dosage of reagents in the final compound is calculated based on the weight of the masterbatch rubber, including: During weighing, the controllable components of the rubber scale are operated to obtain intelligent weighing results of the masterbatch; The intelligent weighing results of the raw rubber compound and the corresponding intelligent weighing results of the masterbatch are entered into the computer for management. Based on the weight of the masterbatch, the first amount of rubber added, and the second amount of rubber added, the dosage of the final compound is calculated. The dosage of the final compound is weighed on the rubber scale added after the masterbatch, and the weight and time of the weighing are displayed on the corresponding display screen.

[0051] In this embodiment, the controllable components of the rubber scale are operated according to the actual purpose of the rubber compounding. After weighing the masterbatch, a series of intelligent weighing results about the masterbatch are obtained and displayed on the display screen of the corresponding rubber scale, including: the weight of the masterbatch, the second amount of rubber added, and the weighing cycle.

[0052] In this embodiment, the intelligent weighing results of the original rubber weigher and the rubber weigher added after the masterbatch mill are entered into the computer for management. The main purpose is to establish a data table for storing and comparing the weight of the original rubber and the weight of the masterbatch.

[0053] In this embodiment, when calculating the dosage of the final compound, the main basis is the weight of the masterbatch and the amount of the second blended rubber. However, it is also important to analyze the relationship with the amount of the first blended rubber during the calculation.

[0054] The beneficial effects of the above technical solution are: by comparing and analyzing the first rubber addition amount and the second rubber addition amount, the relationship between the two can be preliminarily explored, and then the relationship between the weight of the original rubber compound and the weight of the masterbatch can be discovered, which helps to build a model for predicting the weight of the masterbatch and helps to predict the weight of the returned rubber.

[0055] This invention provides a method for improving the efficiency of weighing recycled rubber. In step 4, the recycled rubber scale added after the final mill and the rubber compound scale for the masterbatch are controlled to simultaneously weigh the required weight of recycled rubber and masterbatch according to the dosage of reagents in the final mill formula, and then put them into the final mill for final milling, including: The first conveyor belt is set between the master mill and the rubber weigher added after the master mill; The second conveyor belt is set between the return rubber bin and the return rubber scale corresponding to the final mill; After the masterbatch is finished, the masterbatch rubber produced from the masterbatch mill outlet is placed on the first conveyor belt; The return glue that meets the first glue content is placed on the second conveyor belt. When the gravity sensors on both conveyor belts receive the signal, the automatic synchronization device is triggered to control the two conveyor belts to run at the same time. Simultaneous weighing of masterbatch and recycled rubber yields intelligent weighing results for both. Compare the first and second amounts of adhesive added, and adjust the amount of returned adhesive based on the second amount of adhesive added as the maximum value until the weight is qualified. Weigh the final formulation of reagents based on the weight of the masterbatch rubber and the weight of the recycled rubber. The weighed recycled rubber, masterbatch rubber, and final mixing formulation reagents are fed into the final mixing machine for final mixing.

[0056] In this embodiment, the improved overall structure is as follows: Figure 2 As shown.

[0057] In this embodiment, the automatic simultaneous weighing of masterbatch and recycled rubber is achieved through the automatic synchronization device on the first and second conveyor belts, mainly relying on the gravity sensing device on the conveyor belts to trigger the operation of the automatic synchronization device.

[0058] In this embodiment, the automatic synchronization device can only trigger the control of the conveyor belts to run under the drive of the resistance signal when the gravity sensing devices corresponding to the first and second conveyor belts simultaneously sense gravity and generate resistance signals. The automatic synchronization device controls and adjusts the generators of the two conveyor belts so that the two conveyor belts run at the same time. If one conveyor belt fails, the other conveyor belt will also stop running.

[0059] In this embodiment, the weighing result of the returned rubber is obtained based on the first amount of rubber added, which has an error compared with the second amount of rubber added based on the amount of masterbatch rubber. The second amount of rubber added is taken as the maximum amount of returned rubber that can be added. The returned rubber is adjusted and weighed until it is qualified. While adjusting the weight of the returned rubber, the dosage of the final refining formula can be weighed, saving time and costs. After all the weighing is qualified, it can be put into the final refining machine for final refining.

[0060] The beneficial effects of the above technical solution are: by improving the conveyor belt, the masterbatch rubber and the returned rubber can be weighed simultaneously, which further reduces the time spent weighing the returned rubber separately and improves the efficiency of weighing the returned rubber.

[0061] This invention provides a method for improving the efficiency of weighing returned adhesive, comprising the following steps before placing returned adhesive meeting a first admixture amount onto a second conveyor belt: Rapid testing of the compound obtained after final mixing is performed using a quality testing device. Based on the test results, determine whether the rubber compound is qualified; If it passes the test, it will be put into use. If the mixture fails to meet the standards, it will be transported to the return rubber warehouse for management.

[0062] In this embodiment, the quality inspection device is installed after the final mill, such as... Figure 2 As shown, rapid testing is performed on the compound produced by the final mixer.

[0063] In this embodiment, the quality of the compound directly affects the process performance of subsequent processes and the final quality of the finished product. Therefore, rapid testing of the compound is an important part of tire rubber production.

[0064] In this embodiment, rapid testing equipment and instruments are used to test the vulcanization characteristics, rubber homogeneity, rheological properties, and physical and mechanical properties of the rubber compound. The physical and mechanical properties test includes: Mooney viscosity, tensile strength, elongation, adhesion, and tear strength. The equipment and instruments used for quality testing include: vulcanizer, Mooney meter, electronic tensile testing machine, electric flat vulcanizer, Shore hardness tester, and specific gravity liquid.

[0065] In this embodiment, the substandard compound obtained from the rapid testing of the compound is transported to the return rubber warehouse for management as return rubber. During the management of the return rubber warehouse, the substandard quality problems and weights are recorded, and the return rubber is cut for easy weighing during the final refining.

[0066] The beneficial effects of the above technical solution are: it makes it easier to weigh the returned glue in the returned glue warehouse, which in turn helps to improve the efficiency of weighing returned glue.

[0067] This invention provides a method for improving the efficiency of weighing reclaimed rubber. In step 5, based on several sets of data from the entire rubber mixing process, the weight data of the original rubber compound and masterbatch for different structural positions of the tire are obtained, and a calculation model for the amount of reclaimed rubber required for different structural positions of the tire is constructed, including: By analyzing and processing several sets of historical data, a table of first weight data of several raw rubber compounds and corresponding masterbatch was obtained. The first weight is classified according to the use of the rubber compound in different tire structures, resulting in the second weight data table; Make a second weight data table corresponding to the same purpose right Add a trend line to the scatter plot and obtain the corresponding correlation coefficient value.

[0068] in, For trend lines about The predicted value, The calculation is the sum of squared residuals. This indicates the x-value representing the starting point of the trend line. This represents the sum of squares of all y-values ​​on the trend line; This indicates the information obtained from the scatter plot regarding... The actual value; If the correlation coefficient is greater than the preset coefficient, a univariate linear regression model is established based on the scatter plot.

[0069] in, These are the parameters to be estimated. It is the standard error value; A univariate linear regression analysis was performed on the univariate linear regression model to obtain the statistical results and variance analysis results of the univariate linear regression model. The goodness of fit and the significance of the regression equation were determined based on the statistical results and the analysis of variance results. test; If the judgment and verification are both reasonable, then the final univariate linear regression prediction model is established. Otherwise, process the standard error value and repeat the analysis steps until the judgment and verification are reasonable; Based on the final univariate linear regression prediction model, the weight of the masterbatch is predicted, and the model prediction value is compared with the actual measurement value to determine the absolute error and relative error between the two. If both the absolute error and the relative error are less than the corresponding preset error, then the final univariate linear regression prediction model is deemed reasonable. Otherwise, a new linear regression model needs to be built; If the correlation coefficient is not greater than the preset coefficient value, then the outliers in the scatter plot are processed and the correlation coefficient is recalculated.

[0070] In this embodiment, the weight of the original rubber compound and the corresponding weight of the masterbatch in all historical data are analyzed and processed to obtain a first weight data table of several original rubber compounds and their corresponding masterbatch weights. The original rubber compounds for the same purpose in the first weight data table are extracted separately to obtain a second weight data table of several compounds for the same purpose.

[0071] In this embodiment, the trend line added to the scatter plot can be added using Excel or SPSS tools. The main purpose is to establish a preliminary univariate linear image of the scatter plot and to calculate the correlation coefficient of the univariate linear image.

[0072] In this embodiment, after obtaining the correlation coefficient, a preliminary judgment can be made on the univariate linear image. The preset coefficient value is set to 0.8. When the correlation coefficient is greater than 0.8, it indicates that there is a strong correlation between the predicted value and the actual measured value of the univariate linear image. A corresponding univariate linear regression model can be constructed for the univariate linear image. Otherwise, error value processing is performed on the univariate linear image.

[0073] In this embodiment, when performing univariate linear regression analysis on the univariate linear regression model, Excel or SPSS tools are used for analysis. The statistical results of the regression model obtained include: coefficient of determination, multiple correlation coefficient, adjusted coefficient of determination, standard error, and predicted value; the results of the analysis of variance obtained include: degrees of freedom (DF), mean square (MS), mean sum of squared deviations (SS), and analysis of variance statistic (F). Based on these data, the goodness of fit is judged and the significance of the regression equation is tested using the F-test.

[0074] In this embodiment, the goodness of fit is determined by analyzing the coefficient of determination, the adjusted coefficient of determination, and the negative correlation coefficient. When the three values ​​are close to and infinitely close to 1, it can be determined that the regression independent variable and the dependent variable have a strong linear relationship, and thus the goodness of fit of the regression model can be considered to be good.

[0075] In this embodiment, the F-test for the significance of the regression equation is performed by setting the significance level of the obtained data to 0.05. The variance corresponding to the critical value in the table is compared with the variance analysis statistic, and the test p-value is calculated. If the test p-value is less than the significance level, then the independent variable of the model has a significant impact on the dependent variable, that is, the independent variable and the dependent variable have a strong linear relationship. Therefore, the linear regression effect can be considered to be good.

[0076] In this embodiment, the regression model is considered to be scientifically sound and reasonable, and can obtain more accurate predictions, only when both the goodness of fit and significance test results are reasonable and consistent. If one of them is unreasonable, then the error data must be removed and the model must be rebuilt for correlation coefficient analysis.

[0077] In this embodiment, absolute error refers to the absolute value between the predicted value and the actual measured value, while relative error is calculated as the percentage of absolute error relative to the actual measured value. The preset error is set to be consistent with the error value of weighing rubber materials for different purposes during the actual rubber mixing process. When both the absolute error and the relative error are less than the corresponding preset error, the final univariate linear regression prediction model is deemed reasonable.

[0078] In this embodiment, the processing of outlier data mainly involves removing relatively obvious discrete points on the scatter plot in descending order of dispersion to improve the fitting effect. Specifically, if the correlation coefficient value is not greater than a preset coefficient value, the outliers in the scatter plot are processed and the correlation coefficient is recalculated. This includes: The scatter plot is fitted to obtain a first fitted line. At the same time, the first initial point of the first fitted line and the second initial point below the first fitted line are processed. Remove points that are too high from the first initial point to obtain the first point; at the same time, remove points that are too low from the second initial point to obtain the second point. Obtain the first average value of the first fitted line, obtain the second average value of the first point, and obtain the third average value of the second point; Make the first adjustment for each of the first points;

[0079] in, This represents the first value after adjusting the first point; This represents the initial value before the adjustment at the first point; This represents the second average value; This represents the third average value; This represents the first average value; Make a second adjustment for each second point;

[0080] in, This represents the second value after adjustment corresponding to the second point; This represents the initial value before the adjustment corresponding to the second point; Based on the adjusted first point, the adjusted second point, and all points of the first fitted line, a new scatter plot is obtained, and the correlation coefficient is recalculated.

[0081] In this embodiment, a point that is too high refers to a point where the difference between the first initial point and the value on the vertical axis of the same horizontal coordinate on the first fitting line is too large. For example, if the maximum difference is set to 2, but the obtained difference is 7, then the point needs to be removed. The principle of a point that is too low is similar to that of a point that is too high, so it will not be described in detail here.

[0082] The beneficial effects of the above technical solution are: by establishing a prediction model and optimizing the model, it is expected to obtain the most accurate prediction of the masterbatch weight, thereby calculating the accurate amount of returned rubber and improving the efficiency of symmetrical return rubber.

[0083] This invention provides a method for improving the efficiency of weighing returned adhesive. In step 5, based on a regression analysis prediction model, the weighing time of returned adhesive is optimized, including: After weighing the original rubber compound, the first amount of rubber added was calculated, and the predicted weight value of the masterbatch was obtained based on the final univariate linear regression analysis model. The second predicted rubber blending amount is calculated based on the predicted weight value of the masterbatch; During the masterbatch process, the predicted materials are weighed based on the predicted return rubber value and the predicted formulation reagent value. After obtaining the weight of the masterbatch, the predicted weight of the masterbatch is verified. After adjusting the weight of the returned rubber, proceed with the final mixing process. When the predicted values ​​of the prediction model are all within the reasonable error range for actual use, the weighing time of the returned rubber is reduced after weighing the masterbatch rubber and the returned rubber simultaneously.

[0084] In this embodiment, the predicted masterbatch weight is obtained based on a univariate linear regression prediction model. According to the blending ratio corresponding to the actual use of the original rubber compound, the second predicted blending amount based on the predicted masterbatch weight is calculated. The predicted material is weighed. After the actual weight of the masterbatch is weighed, the predicted masterbatch weight is analyzed for error. If it is less than a reasonable error value, no adjustment is needed for the predicted material obtained by symmetrical measurement; otherwise, adjustment is performed.

[0085] In this embodiment, after extensive practical verification of the prediction model, the predicted values ​​of the prediction model are all within the reasonable error range of actual use. Therefore, the predicted material calculated and weighed according to the prediction model does not need to be adjusted. In the actual weighing process, all weighing steps from the original rubber material weighing to the final mixing can be omitted.

[0086] The beneficial effect of the above technical solution is that, based on actual verification and adjustment, a more accurate prediction model is obtained, which can further improve the efficiency of weighing return glue.

[0087] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for improving the efficiency of weighing returned adhesive, characterized in that, include: Step 1: Based on the rubber weigher added in front of the masterbatch mill, weigh the original rubber compound and the masterbatch formulation reagents, and calculate the first rubber addition amount according to the first rubber addition ratio; Step 2: After the original rubber compound has passed through the masterbatch mill, the masterbatch rubber is weighed using the rubber compound scale added after the masterbatch mill, and the amount of the second blending is calculated according to the second blending ratio. Step 3: Manage the first and second rubber addition amounts, and calculate the dosage of reagents in the final compound based on the weight of the masterbatch rubber. Step 4: Control the added return rubber scale and masterbatch scale after the final mill to weigh the required weight of return rubber and masterbatch rubber according to the dosage of reagents in the final mill formula, and put them into the final mill for final milling. Step 5: Based on several sets of data from the entire rubber mixing process, obtain the weight data of the original rubber compound and masterbatch for different structural positions of the tire, and construct a calculation model for the amount of returned rubber required for different structural positions of the tire. In step 2, before weighing the masterbatch rubber after the original rubber compound has passed through the masterbatch mill, using a rubber compound scale added after the masterbatch mill, the following steps are included: A timer is installed on one side of the gravity sensing device of the rubber scale added after the master mill to control the timer and the gravity sensing device to work simultaneously. During the historical weighing process of masterbatch rubber, the weight sensing results captured by the gravity sensing device are obtained, and the stabilization time of the initial stable weight is captured based on the historical timing results of the timer. At the same time, it is determined whether there is a jump in the weight sensing result after the stabilization time. If there is no jump, the stabilization time is regarded as one weighing cycle. If it exists, the transition time of the jump is locked based on the timing result of the timer, and the stable time is periodically extended as a secondary weighing cycle; The frequency of the first occurrence of a weighing cycle and the frequency of the second occurrence of a weighing cycle in the historical weighing process are statistically analyzed. Based on the frequency results, the cycle priority is set for the corresponding rubber weigher, and the subsequent masterbatch is weighed. Each rubber material scale is equipped with a corresponding controllable component, which is used to control the corresponding component to perform intelligent weighing according to the set weighing cycle before weighing the matching rubber material.

2. The method for improving the efficiency of weighing returned adhesive according to claim 1, characterized in that, In step 1, based on the rubber weigher added before the masterbatch mill, the original rubber compound and masterbatch formulation reagents are weighed, and the first rubber blending amount is calculated according to the first blending ratio, including: The rubber weigher added before using the masterbatch mill is used to weigh the raw rubber and the formulated chemicals; Based on the application of rubber compounds in different tire structures, the mixing ratio for each application is coded. Based on the aforementioned code, corresponding controllable components are set on the rubber scale to control the corresponding components to perform intelligent weighing before weighing the matched rubber material. Before using the rubber scale for actual weighing, set the standard accuracy to the corresponding controllable component according to the intended use of the rubber material of the corresponding structure, and display the weight of the original rubber material and the first amount of rubber added on the display screen of the rubber scale. The weighed raw rubber compound and masterbatch formulation reagents are fed into the masterbatch mixer for masterbatch mixing.

3. The method for improving the efficiency of weighing returned adhesive according to claim 1, characterized in that, In step 3, the amounts of the first and second rubber admixtures are managed, and the dosage of the final compound is calculated based on the weight of the masterbatch, including: During weighing, the controllable components of the rubber scale are operated to obtain intelligent weighing results of the masterbatch; The intelligent weighing results of the raw rubber compound and the corresponding intelligent weighing results of the masterbatch are entered into the computer for management. Based on the weight of the masterbatch, the first amount of rubber added, and the second amount of rubber added, the dosage of the final compound is calculated. The dosage of the final compound is weighed on the rubber scale added after the masterbatch, and the weight and time of the weighing are displayed on the corresponding display screen.

4. The method for improving the efficiency of weighing returned adhesive according to claim 3, characterized in that, In step 4, the return rubber scale added after the final mill and the rubber compound scale for the masterbatch are weighed simultaneously according to the dosage of the final milling formula, and then fed into the final mill for final milling, including: The first conveyor belt is positioned between the master mill and the rubber weigher added after the master mill; The second conveyor belt is set between the return rubber bin and the return rubber scale corresponding to the final mill; After the masterbatch is finished, the masterbatch rubber produced from the masterbatch mill outlet is placed on the first conveyor belt; The return glue that meets the first glue content is placed on the second conveyor belt. When the gravity sensors on both conveyor belts receive the signal, the automatic synchronization device is triggered to control the two conveyor belts to run at the same time. Simultaneous weighing of masterbatch and recycled rubber yields intelligent weighing results for both. Compare the first and second amounts of adhesive added, and adjust the amount of returned adhesive based on the second amount of adhesive added as the maximum value until the weight is qualified. Weigh the final formulation of reagents based on the weight of the masterbatch rubber and the weight of the recycled rubber. The weighed recycled rubber, masterbatch rubber, and final mixing formulation reagents are fed into the final mixing machine for final mixing.

5. The method for improving the efficiency of weighing returned adhesive according to claim 4, characterized in that, Before placing the return glue that meets the first glue dosage onto the second conveyor belt, the following steps are included: Rapid testing of the compound obtained after final mixing is performed using a quality testing device. Based on the test results, determine whether the rubber compound is qualified; If it passes the test, it will be put into use. If the mixture fails to meet the standards, it will be transported to the return rubber warehouse for management.

6. The method for improving the efficiency of weighing returned adhesive according to claim 1, characterized in that, In step 5, based on several sets of data from the entire rubber mixing process, the weight data of the raw rubber compound and masterbatch for different structural locations of the tire are obtained. A calculation model is then constructed to determine the amount of returned rubber required for different structural locations of the tire, including: By analyzing and processing several sets of historical data, a table of first weight data of several raw rubber compounds and corresponding masterbatch was obtained. The first weight is classified according to the use of the rubber compound in different tire structures, resulting in the second weight data table; Make a second weight data table corresponding to the same purpose right Add a trend line to the scatter plot and obtain the corresponding correlation coefficient value. in, For trend lines about The predicted value, The calculation is the sum of squared residuals. This indicates the x-value representing the starting point of the trend line. This represents the sum of squares of all y-values ​​on the trend line. This indicates the information obtained from the scatter plot regarding... The actual value; If the correlation coefficient is greater than the preset coefficient, a univariate linear regression model is established based on the scatter plot. in, These are the parameters to be estimated. It is the standard error value; A univariate linear regression analysis was performed on the univariate linear regression model to obtain the statistical results and variance analysis results of the univariate linear regression model. The goodness of fit and the significance of the regression equation were determined based on the statistical results and the analysis of variance results. test; If the judgment and verification are both reasonable, then the final univariate linear regression prediction model is established. Otherwise, process the standard error value and repeat the analysis steps until the judgment and verification are reasonable; Based on the final univariate linear regression prediction model, the weight of the masterbatch is predicted, and the model prediction value is compared with the actual measurement value to determine the absolute error and relative error between the two. If both the absolute error and the relative error are less than the corresponding preset error, then the final univariate linear regression prediction model is deemed reasonable. Otherwise, a new linear regression model needs to be built; If the correlation coefficient is not greater than the preset coefficient value, then the outliers in the scatter plot are processed and the correlation coefficient is recalculated.

7. The method for improving the efficiency of weighing returned adhesive according to claim 6, characterized in that, In step 5, based on the regression analysis prediction model, the return glue weighing time is optimized, including: After weighing the original rubber compound, the first amount of rubber added was calculated, and the predicted weight value of the masterbatch was obtained based on the final univariate linear regression analysis model. The second predicted rubber blending amount is calculated based on the predicted weight value of the masterbatch; During the masterbatch process, the predicted materials are weighed based on the predicted return rubber value and the predicted formulation reagent value. After obtaining the weight of the masterbatch, the predicted weight of the masterbatch is verified. After adjusting the weight of the returned rubber, proceed with the final mixing process. When the predicted values ​​of the prediction model are all within the reasonable error range for actual use, the weighing time of the returned rubber is reduced after weighing the masterbatch rubber and the returned rubber simultaneously.

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