An automatic mixing control system used in plastic manufacturing

Abstract

The invention discloses an automatic mixing control system applied to plastic manufacturing, and relates to the technical field of plastic manufacturing. The invention comprises a mixing plan formulation unit, a raw material allocation unit, a mixing adjustment unit and a quality detection unit. The historical mixing data of each mixing device and each preset raw material ratio scheme in the mixing plan table are used to allocate a corresponding mixing plan for each mixing device, and the mixing process is monitored. When in the high-consumption mode, the start and stop and power of each mixing device are controlled, and the mixing quality is detected after the mixing is completed, so as to effectively improve the quality of plastic raw material mixing, maximize the stirring effect of the mixing device, reduce the energy consumption and damage of the mixing device, detect the mixture from multiple dimensions, ensure the reliability and accuracy of the mixture quality detection, provide effective parameters for subsequent mixing control, and thus increase the mixing optimization effect.

Description

Technical Field

[0001] The invention relates to the technical field of plastic manufacturing, and in particular to an automatic material mixing control system applied to plastic manufacturing. Background Art

[0002] As market demands continue to change, product requirements for plastic material performance are becoming more and more diverse. Plastic mixing can create materials with new properties to meet these requirements, and precise control during plastic mixing can ensure the quality of plastic mixing and improve the performance of plastic products.

[0003] Prior art, such as a modified plastic processing system and method disclosed in application publication number CN116214762B, comprises a material taking device, a processing bin, a mixing, heating and pressurizing device, a cooling and molding device, an extrusion device, a cutting device, a material receiving barrel and a processor; the processor is used to: control the material taking device to grab the raw material plastic and the processing agent respectively and place them into the processing bin; control the mixing, heating and pressurizing device to mix the raw material plastic and the processing agent in the processing bin based on the mixing parameters, and to heat and pressurize the raw material plastic and the processing agent based on the heating and pressurizing parameters to obtain a molten mixture, wherein the mixing parameters include at least one of the mixing intensity and the mixing time; in the processing bin, control the cooling and molding device to cool and mold the molten mixture based on the cooling parameters, and control the extrusion device to extrude the cooled and molded modified plastic strips from the discharge hole of the processing bin; and control the cutting device to cut the modified plastic strips extruded from the discharge hole to obtain modified plastic particles.

[0004] Prior art, such as the application with publication number CN115082457, discloses a method for evaluating the mixing effect of fiber-modified plastics. This method can be integrated into an artificial intelligence system in the production field, and can also be used for the development of computer vision software to detect new materials. The surface grayscale image of the plastic mixture is obtained through a camera using optical means to analyze the modified plastic material; sampling images of different scales are obtained, and the intensity balance coefficient and mixing balance coefficient corresponding to the sampling images of different scales obtained by analyzing the grayscale information of the pixels in the sampling images and the grayscale gradient direction of the pixels are used to obtain the mixing effect evaluation value of the plastic mixture. The present invention not only analyzes whether the mixing of the plastic mixture is balanced, but also analyzes the isotropic uniformity of the strength of the modified plastic with other fibers added, and comprehensively obtains the mixing effect evaluation value of the plastic mixture, which can more accurately control the quality of the modified plastic.

[0005] The above scheme has at least the following deficiencies: 1. When mixing plastic raw materials, different plastic raw material ratios, different rotation methods, additives and mixing equipment will produce different mixtures with different qualities. In the above scheme, when mixing, the appropriate mixing equipment, reference mixing scheme and reference additive addition scheme are not selected based on the plastic raw material ratios and the historical mixing data of the mixing equipment, thereby failing to effectively improve the quality of the plastic raw material mixing and failing to maximize the mixing effect of the mixing equipment.

[0006] 2. When the power and temperature of the mixing equipment in the production workshop are too high, the energy consumption of the cooling equipment needs to be increased, thereby increasing the power consumption of production and increasing energy waste. However, the above scheme does not control the start and stop and power of the mixing equipment when the mixing equipment is at high power or high temperature, thereby failing to reduce the energy consumption and damage of the mixing equipment, affecting the mixing effect of the mixing equipment.

[0007] 3. When plastic raw materials are mixed, the added additives and the mixing effect have a certain impact on the viscosity, hardness and density of the mixed mixture. The above scheme only monitors the strength of the mixture, and does not detect the mixture from multiple dimensions, which reduces the reliability and accuracy of the mixture quality detection, and cannot provide effective parameters for subsequent mixing control, thereby reducing the effect of mixing optimization. Summary of the invention

[0008] In view of the above-mentioned technical deficiencies, the object of the present invention is to provide an automatic mixing control system for plastic manufacturing.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides an automatic mixing control system applied to plastic manufacturing, including: a mixing plan formulation unit, which is used to number each mixing equipment in the area, and then obtain the historical mixing data of each mixing equipment, and formulate a mixing reference table for each mixing equipment.

[0010] The raw material allocation unit is used to extract the mixing plan table, use the mixing reference table of each mixing device to allocate the corresponding mixing plan to each mixing device, and allocate the raw materials according to the corresponding mixing plan.

[0011] The mixing adjustment unit includes an operation monitoring module and a stirring adjustment module.

[0012] The operation monitoring module is used to monitor the operation of each mixing device and classify the operation of the mixing device. When the operation of the mixing device is classified as a high-consumption type, the stirring adjustment module is executed.

[0013] The stirring adjustment module is used to adjust the power level of each mixing device according to the mixing plan corresponding to each mixing device.

[0014] The quality detection unit is used to detect and provide feedback on the quality of the materials mixed by each mixing device after the mixing is completed.

[0015] The beneficial effects of the present invention are as follows: the present invention provides an automatic mixing control system for plastic manufacturing, which utilizes the historical mixing data of each mixing device and the preset raw material ratio schemes in the mixing plan table to allocate a corresponding mixing plan for each mixing device, and monitors the mixing process. When in high-consumption mode, the start and stop and power of each mixing device are controlled, and the mixing quality is tested after the mixing is completed, which effectively improves the quality of plastic raw material mixing, maximizes the stirring effect of the mixing equipment, and reduces the energy consumption and damage of the mixing equipment. The mixture is tested from multiple dimensions to ensure the reliability and accuracy of the mixture quality test, and provide effective parameters for subsequent mixing control, thereby increasing the effect of mixing optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the system structure connection of the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1 As shown, an automatic mixing control system applied to plastic manufacturing includes: a mixing plan formulation unit, a raw material distribution unit, a mixing adjustment unit and a quality detection unit.

[0020] The mixing plan formulation unit is used to number each mixing device in the area, then obtain the historical mixing data of each mixing device, and formulate a mixing reference table for each mixing device.

[0021] The historical mixing data of each mixing device is obtained from the automatic mixing control system.

[0022] In a specific embodiment, the mixing reference table for each mixing equipment is formulated, and the specific process is as follows: extracting the raw material ratio scheme, stirring scheme, additive addition scheme, mixing time, mixing energy consumption and mixing quality characteristic value corresponding to each mixing under the default operating power level from the historical mixing data of each mixing equipment.

[0023] It should be noted that the default operating power level is the power level set by the manufacturer for optimal operation of the mixing equipment, which can be obtained from the manual of the mixing equipment.

[0024] The raw material ratio plan includes the quantity of various raw materials; the stirring plan includes stirring speed and stirring frequency, etc.; the additive addition plan includes the content of various additives, among which various additives include calcium carbonate and talcum powder, etc.

[0025] The mixing time, mixing energy consumption and mixing quality characteristic values ​​corresponding to each mixing of each mixing equipment are normalized, and the processed values ​​are recorded as , and , i represents the number corresponding to each mixing device, f represents the number corresponding to each mixing, and both i and f are positive integers; then they are input into the mixing evaluation model, and the mixing evaluation results corresponding to each mixing of each mixing device are output.

[0026] Preferably, the hybrid evaluation model expression is: , where , They are the upper and lower limits of the mixed evaluation coefficient. It represents the mixing evaluation result corresponding to the f-th mixing of the i-th mixing equipment.

[0027] Among them, the upper and lower limits of the mixing evaluation coefficient are critical values ​​for judging the mixing effect, which are set by equipment professionals. When the calculated value is greater than the upper limit of the mixing evaluation coefficient, it indicates that the mixing effect is good. When the calculated value is greater than the lower limit of the mixing evaluation coefficient and less than or equal to the upper limit of the mixing evaluation coefficient, it indicates that the mixing effect is average. When the calculated value is less than the lower limit of the mixing evaluation coefficient, it indicates that the mixing effect is poor. For example: the upper and lower limits of the mixing evaluation coefficient are 5 and 2 respectively. The calculated value of is 6, 6>5, indicating that the mixing effect corresponding to the f-th mixing of the i-th mixing equipment is good.

[0028] The mixed evaluation result contains values ​​of 1, 0, and -1. When the mixed evaluation result is 1, it indicates that the mixed effect is good. When the mixed evaluation result is 0, it indicates that the mixed effect is average. When the mixed evaluation result is -1, it indicates that the mixed effect is poor.

[0029] Extract each mixing of each mixing equipment with a mixing evaluation result of 1 as each marked mixing, and extract the raw material ratio scheme, stirring scheme, and additive addition scheme corresponding to each marked mixing; then compare the raw material ratio schemes of each marked mixing, integrate the same raw material ratio schemes, and obtain the stirring schemes and additive addition schemes corresponding to each raw material ratio scheme, which are recorded as and , y represents the number of each raw material matching plan, g represents the number of each mixing plan, r represents the number of each additive addition plan, y, g and r are all positive integers, and then confirm the reference mixing plan and reference additive addition plan corresponding to each raw material ratio plan, and use each raw material ratio plan, the reference mixing plan and reference additive addition plan corresponding to each raw material ratio plan as the primary mixing reference plan in each mixing equipment.

[0030] Preferably, the specific process of confirming the reference stirring scheme and the reference additive adding scheme corresponding to each raw material ratio scheme is as follows:

[0031] Will and Enter the calculation formulas respectively: , , the stirring difference result and additive difference result of the yth raw material ratio scheme in the i-th mixing equipment are obtained, where n and m represent the number of stirring schemes and the number of additive addition schemes, respectively. , They respectively represent the preset stirring scheme and the preset additive adding scheme of each raw material ratio scheme in the t-th mixing equipment, , They are the set stirring difference coefficient threshold and additive difference threshold respectively.

[0032] in, , and , The setup process is the same and will not be described here.

[0033] The preset stirring scheme and preset additive adding scheme of each raw material ratio scheme in the t mixing equipment are obtained by the manufacturer through testing before leaving the factory and can be obtained from the manual of the mixing equipment.

[0034] If the stirring difference result of a certain raw material ratio scheme in a certain mixing equipment is 1, the preset stirring scheme is selected as the reference stirring scheme. If the stirring difference result of a certain raw material ratio scheme in a certain mixing equipment is 0, the stirring quality ranking of each stirring scheme corresponding to the raw material ratio scheme in the mixing equipment is obtained, and the stirring scheme with the first ranking is selected as the reference stirring scheme.

[0035] In the above, the mixing evaluation coefficient corresponding to the f-th mixing of the i-th mixing equipment is The calculation formula is: , and obtain the raw material ratio scheme corresponding to each mixing of each mixing device, and use the mixing evaluation coefficient corresponding to each mixing of each mixing device as the mixing evaluation coefficient of the raw material ratio scheme corresponding to each mixing of each mixing device, so as to count the mixing evaluation coefficients of each raw material ratio scheme of each mixing device, and then perform mean calculation to obtain the average mixing evaluation coefficient of each raw material ratio scheme of each mixing device, and sort the raw material ratio schemes of each mixing device in descending order of the average mixing evaluation coefficient to obtain the stirring quality ranking of each raw material ratio scheme corresponding to each stirring scheme. If the stirring difference result of a raw material ratio scheme in a certain mixing device is 0, then the stirring quality ranking of the raw material ratio scheme corresponding to each stirring scheme in the mixing device is obtained from the stirring quality ranking of each raw material ratio scheme corresponding to each stirring scheme.

[0036] According to the analysis method of the reference stirring plan, the reference additive addition plan is obtained.

[0037] Extract each mixing in each mixing device with a mixing evaluation result of 0, and obtain the secondary mixing reference plan in each mixing device according to the analysis method of the primary mixing reference plan in each mixing device.

[0038] Extract each mixing with a mixing evaluation result of -1 in each mixing equipment, and obtain the third-level mixing reference plan in each mixing equipment according to the analysis method of the first-level mixing reference plan in each mixing equipment;.

[0039] The primary mixing reference plan, the secondary mixing reference plan and the tertiary mixing reference plan in each mixing equipment are used as mixing reference tables.

[0040] The raw material allocation unit is used to extract the mixing plan table, use the mixing reference table of each mixing device to allocate the corresponding mixing plan to each mixing device, and allocate the raw materials according to the corresponding mixing plan.

[0041] In a specific embodiment, the corresponding mixing plan is assigned to each mixing device in the following manner: S1. Obtain each preset raw material ratio scheme and the estimated end time of each preset raw material ratio scheme from the mixing plan table, and sort each preset raw material ratio scheme in descending order of the estimated time.

[0042] S2. Compare the first-ranked preset raw material ratio scheme with each raw material ratio scheme in the first-level mixing reference plan in the mixing reference table of each mixing equipment in turn. If the first-ranked preset raw material ratio scheme is the same as a raw material ratio scheme in the first-level mixing reference plan in the mixing reference table of a certain mixing equipment, then allocate the first-ranked preset raw material ratio scheme to the mixing equipment.

[0043] S3. If the first-ranked preset raw material ratio scheme is the same as or different from the raw material ratio schemes in the first-level mixing reference plan in the mixing reference table of each mixing equipment, the first-ranked preset raw material ratio scheme is used as the first pending scheme; then the second-ranked preset raw material ratio scheme is obtained, and allocated according to the allocation method of the first-ranked preset raw material ratio scheme, in this way, a round of allocation is performed on each preset raw material ratio scheme, and each pending scheme and the remaining mixing equipment are obtained.

[0044] S4. Compare each pending scheme with each raw material ratio scheme in the secondary mixing reference plan in the mixing reference table of each remaining mixing equipment, and allocate each pending scheme according to steps S2-S3, complete the allocation, and obtain the preset raw material ratio scheme corresponding to each mixing equipment, and at the same time extract the reference stirring scheme and reference additive addition scheme of the preset raw material ratio scheme corresponding to each mixing equipment from the mixing reference table of each mixing equipment as the mixing plan of each mixing equipment.

[0045] The mixing adjustment unit includes an operation monitoring module and a stirring adjustment module.

[0046] The operation monitoring module is used to monitor the operation of each mixing device and classify the operation of the mixing device. When the operation of the mixing device is classified as a high-consumption type, the stirring adjustment module is executed.

[0047] In a specific embodiment, the operation of the mixing equipment is classified, and the specific process is as follows: use a power meter and a temperature sensor to collect the actual power and operating temperature of each mixing equipment. When the actual power of a mixing equipment is greater than a preset power and the duration is greater than a preset duration, or the operating temperature is greater than a preset temperature and the duration is greater than a preset duration, the mixing equipment is recorded as a high-consumption equipment, so as to count the number of high-consumption equipment.

[0048] When the number of high-consumption equipment is greater than the preset number of equipment, the operation of the mixing equipment is classified as a high-consumption type.

[0049] The setting process of preset power, preset duration, preset temperature and preset number of devices is the same as , The setup process is the same and will not be described here.

[0050] The stirring adjustment module is used to adjust the power level of each mixing device according to the mixing plan corresponding to each mixing device.

[0051] In a specific embodiment, the power level of each mixing device is adjusted, and the specific adjustment process is as follows: the quantity of various raw materials is obtained from the preset raw material ratio scheme corresponding to each mixing device, and the stirring image corresponding to each mixing device is collected. The uniformity of the raw materials in each mixing device is obtained by using machine vision technology, and according to the actual power and operating temperature of each mixing device, it is analyzed whether there is a mixing device that can be suspended. If so, the mixing devices that can be suspended are suspended, and the mixing devices that cannot be suspended are recorded as adjustment devices.

[0052] Among them, machine vision technology is used to obtain the detection quantity of various raw materials from the stirring images corresponding to each mixing equipment, and the difference between the detection quantity of various raw materials and the quantity of various raw materials is calculated. Then, the ratio of 1 to the absolute value of the difference and the quantity of various raw materials is subtracted, and then the mean is calculated to obtain the uniformity of the raw materials in each mixing equipment.

[0053] Preferably, the analysis is performed to determine whether there is a mixing device that can be suspended. The specific process is as follows: the difference between the quantities of various raw materials in the preset raw material ratio scheme corresponding to each mixing device is calculated, and the maximum weight difference is selected as the raw material weight difference in each mixing device, recorded as , i represents the number of each mixing equipment, i is a positive integer, and the uniformity of raw materials, actual power and operating temperature of each mixing equipment are recorded as , and .

[0054] Using the analytical formula: , get the operating characteristic value of the i-th mixing equipment , where G, JY, P, and T represent the preset weight difference threshold, average uniformity, preset power, and preset duration, respectively.

[0055] When the operating characteristic values ​​of all mixing devices are 0, it indicates that there is no mixing device that can be suspended; when there is at least one mixing device with an operating characteristic value of 1, it indicates that there is a mixing device that can be suspended, and each mixing device with an operating characteristic value of 1 is a mixing device that can be suspended.

[0056] It should be noted that when the weight difference of the raw materials is too large, the raw materials are easy to stratify when the equipment is paused, which will lead to the previous mixing effect. Therefore, when the weight difference of the raw materials is too large, the operation cannot be paused.

[0057] The process of setting the preset weight difference is similar to , The setup process is the same and will not be described here.

[0058] The average uniformity is calculated by averaging the uniformity of the raw materials in each mixing equipment.

[0059] The adjustments of each regulating device from the default operating power gear to each low power gear are extracted from the historical mixing data of each regulating device and recorded as each adjustment. Then, the raw material ratio scheme, raw material uniformity before adjustment and mixing characteristic value of each regulating device are extracted from the historical mixing data of each regulating device.

[0060] The historical mixing data of each regulating device stores the adjustments of each regulating device from the default operating power to each power level, and each power level that is less than the default operating power level is regarded as each low power level.

[0061] The raw material ratio scheme of each adjustment of each adjustment device is compared with the preset raw material ratio scheme, and each adjustment with the same raw material ratio scheme as the preset raw material ratio scheme is selected as each marked adjustment, and the low-power gear, pre-adjustment raw material uniformity and mixed quality characteristic value corresponding to each marked adjustment are obtained, and the stirring characteristic value corresponding to each marked adjustment of each adjustment device is analyzed, and the low-power gear of the marked adjustment first corresponding to the stirring characteristic value in each adjustment device is selected as the adjustment power gear of each adjustment device, and then the power gear of each adjustment device is adjusted accordingly.

[0062] It should be noted that the uniformity of the raw materials before adjustment refers to the uniformity of the raw materials before adjustment. The process of obtaining the uniformity of the raw materials before adjustment is the same as the process of obtaining the uniformity of the raw materials in each mixing equipment, which will not be repeated here.

[0063] Preferably, the analysis process of the stirring characteristic values ​​corresponding to each mark adjustment of each adjustment device is as follows: the uniformity and mixed quality characteristic values ​​of the raw materials before adjustment corresponding to each mark adjustment of each adjustment device are respectively recorded as and , q represents the number of each mark adjustment, q is a positive integer, substitute into the analysis formula: , get the stirring characteristic value corresponding to the qth mark adjustment of the i-th adjustment device , where It represents the average value of the mixed characteristic value corresponding to the mark adjustment of the i-th regulating device, and e is a natural constant.

[0064] When the mixing of a certain regulating device is completed, the restart priority of each mixing device that can be suspended is obtained, and the mixing device with the first restart priority is restarted. According to the adjustment power level analysis method of each regulating device, the adjustment power level of the mixing device with the first restart priority is obtained, and then corresponding adjustments are made. In this way, the adjustment of the power level of each mixing device is completed.

[0065] The quality detection unit is used to detect and provide feedback on the quality of the materials mixed by each mixing device after the mixing is completed.

[0066] In a specific embodiment, the quality of the mixing equipment after mixing is tested, and the specific process is as follows: random sampling is performed on the mixture after mixing by each mixing equipment to obtain each sample of the mixture of each mixing equipment, each sample is divided into three parts, and the viscosity, hardness and density of the three parts are tested respectively by using a viscosity sensor, a hardness sensor and a densitometer to obtain the viscosity, hardness and density corresponding to each sample.

[0067] The viscosity, hardness and density of each sample in the mixture of each mixing equipment are used to calculate the mixed quality characteristic value of each mixing equipment, and to judge whether the mixing quality of each mixing equipment is qualified.

[0068] In another specific embodiment, the calculation process of the mixing characteristic value of each mixing device is as follows: the expected viscosity, expected hardness, expected density, allowable viscosity difference, allowable hardness difference and allowable density difference of each mixing device corresponding to the preset raw material ratio scheme are obtained from the mixing plan table, and are respectively recorded as , , , , and , i represents the number of each mixing equipment, i is a positive integer, and the viscosity, hardness and density of each sample in the mixture of each mixing equipment are recorded as , and , k represents the number of each sample, and k is a positive integer.

[0069] Using the calculation formula: , get the mixed material characteristic value of the i-th mixing equipment , where , They represent the mass conformity coefficient and mass uniformity coefficient of the kth sample in the ith mixture, and s represents the number of samples; , , e represents a natural constant.

[0070] The mixing characteristic values ​​of each mixing device are stored in the automatic mixing control system.

[0071] Preferably, when the mixing quality characteristic value of a certain mixing device is less than the set mixing quality characteristic value, it indicates that the mixing quality of the mixing device is unqualified, otherwise it indicates that the mixing quality of the mixing device is qualified, so as to judge whether the mixing quality of each mixing device is qualified, and the analysis result of whether the mixing quality of each mixing device is qualified is fed back to the display for display. , The setup process is the same and will not be described here.

[0072] The embodiment of the present invention utilizes the historical mixing data of each mixing device and each preset raw material ratio scheme in the mixing plan table, allocates a corresponding mixing plan for each mixing device, and monitors the mixing process. When in the high-consumption mode, the start and stop and power of each mixing device are controlled, and the mixing quality is tested after the mixing is completed, which effectively improves the quality of plastic raw material mixing, maximizes the stirring effect of the mixing equipment, and reduces the energy consumption and damage of the mixing equipment. The mixture is tested from multiple dimensions to ensure the reliability and accuracy of the mixture quality detection, and provide effective parameters for subsequent mixing control, thereby increasing the effect of mixing optimization.

[0073] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined in this specification, they shall all fall within the protection scope of the present invention.

Claims

1. An automatic mixing control system used in plastic manufacturing, characterized in that: include: A mixing plan formulation unit is used to number each mixing device in the area, then obtain the historical mixing data of each mixing device, and formulate a mixing reference table for each mixing device; The specific process of formulating the mixing reference table of each mixing device is as follows: extracting the raw material ratio scheme, stirring scheme, additive addition scheme, mixing time, mixing energy consumption and mixing quality characteristic value corresponding to each mixing under the default operating power gear from the historical mixing data of each mixing device; The mixing time, mixing energy consumption and mixing quality characteristic values ​​corresponding to each mixing of each mixing equipment are normalized, and the processed values ​​are recorded as a1 if 、a2 if and a3 if , i represents the number corresponding to each mixing device, f represents the number corresponding to each mixing, and both i and f are positive integers; then input into the mixing evaluation model, and output the mixing evaluation results corresponding to each mixing of each mixing device; The mixed evaluation result contains values ​​of 1, 0, and -1. When the mixed evaluation result is 1, it indicates that the mixed effect is good. When the mixed evaluation result is 0, it indicates that the mixed effect is average. When the mixed evaluation result is -1, it indicates that the mixed effect is poor. Extract each mixing of each mixing equipment with a mixing evaluation result of 1 as each marked mixing, and extract the raw material ratio scheme, stirring scheme, and additive addition scheme corresponding to each marked mixing; then compare the raw material ratio schemes of each marked mixing, integrate the same raw material ratio schemes, and obtain the stirring schemes and additive addition schemes corresponding to each raw material ratio scheme, which are recorded as and y represents the number of each raw material matching scheme, g represents the number of each mixing scheme, r represents the number of each additive adding scheme, y, g and r are all positive integers, and then the reference mixing scheme and reference additive adding scheme corresponding to each raw material ratio scheme are confirmed, and each raw material ratio scheme, the reference mixing scheme and reference additive adding scheme corresponding to each raw material ratio scheme are used as the primary mixing reference plan in each mixing equipment; Extract each mixing of which the mixing evaluation result is 0 in each mixing device, and obtain the secondary mixing reference plan in each mixing device according to the analysis method of the primary mixing reference plan in each mixing device; Extract each mixing of which the mixing evaluation result is -1 in each mixing device, and obtain the third-level mixing reference plan in each mixing device according to the analysis method of the first-level mixing reference plan in each mixing device; The primary mixing reference plan, the secondary mixing reference plan and the tertiary mixing reference plan in each mixing equipment are used as a mixing reference table; The specific process of confirming the reference stirring scheme and reference additive adding scheme corresponding to each raw material ratio scheme is as follows: Will and Enter the calculation formulas respectively: The stirring difference result and additive difference result of the yth raw material ratio scheme in the i-th mixing equipment are obtained, where n and m represent the number of stirring schemes and the number of additive addition schemes, respectively. They respectively represent the preset stirring scheme and the preset additive adding scheme of each raw material ratio scheme in the t-th mixing equipment, and γ1 and γ2 are the set stirring difference coefficient threshold and additive difference threshold respectively; If the stirring difference result of a certain raw material ratio scheme in a certain mixing equipment is 1, the preset stirring scheme is selected as the reference stirring scheme; if the stirring difference result of a certain raw material ratio scheme in a certain mixing equipment is 0, the stirring quality ranking of each stirring scheme corresponding to the raw material ratio scheme in the mixing equipment is obtained, and the stirring scheme with the first ranking is selected as the reference stirring scheme; According to the analysis method of the reference stirring scheme, a reference additive addition scheme is obtained; A raw material allocation unit is used to extract a mixing plan table, allocate a corresponding mixing plan to each mixing device using a mixing reference table of each mixing device, and allocate raw materials according to the corresponding mixing plan; The mixing adjustment unit includes an operation monitoring module and a mixing adjustment module; The operation monitoring module is used to monitor the operation of each mixing device and classify the operation of the mixing device. When the operation of the mixing device is classified as a high-consumption type, the stirring adjustment module is executed; The stirring adjustment module is used to adjust the power level of each mixing device according to the mixing plan corresponding to each mixing device; The quality detection unit is used to detect and provide feedback on the quality of the materials mixed by each mixing device after the mixing is completed.

2. The automatic mixing control system for plastic manufacturing according to claim 1, characterized in that: The specific method of allocating a corresponding mixing plan to each mixing device is as follows: S1. Obtain each preset raw material ratio scheme and the estimated end time of each preset raw material ratio scheme from the mixing plan table, and sort each preset raw material ratio scheme in descending order according to the estimated time; S2, comparing the first-ranked preset raw material ratio scheme with each raw material ratio scheme in the first-level mixing reference plan in the mixing reference table of each mixing equipment in turn, if the first-ranked preset raw material ratio scheme is the same as a raw material ratio scheme in the first-level mixing reference plan in the mixing reference table of a certain mixing equipment, then allocating the first-ranked preset raw material ratio scheme to the mixing equipment; S3. If the first-ranked preset raw material ratio scheme is the same as or different from the raw material ratio schemes in the first-level mixing reference plan in the mixing reference table of each mixing equipment, the first-ranked preset raw material ratio scheme is used as the first pending scheme; then the second-ranked preset raw material ratio scheme is obtained, and it is allocated according to the allocation method of the first-ranked preset raw material ratio scheme, and a round of allocation is performed on each preset raw material ratio scheme in this way, and each pending scheme and the remaining mixing equipment are obtained; S4. Compare each pending scheme with each raw material ratio scheme in the secondary mixing reference plan in the mixing reference table of each remaining mixing equipment, and allocate each pending scheme according to steps S2-S3, complete the allocation, and obtain the preset raw material ratio scheme corresponding to each mixing equipment, and at the same time extract the reference stirring scheme and reference additive addition scheme of the preset raw material ratio scheme corresponding to each mixing equipment from the mixing reference table of each mixing equipment as the mixing plan of each mixing equipment.

3. The automatic mixing control system for plastic manufacturing according to claim 1, characterized in that: The operation of the mixing equipment is classified as follows: Use a power meter and a temperature sensor to collect the actual power and operating temperature of each mixing device. When the actual power of a mixing device is greater than the preset power and the duration is greater than the preset duration, or the operating temperature is greater than the preset temperature and the duration is greater than the preset duration, the mixing device is recorded as a high-consumption device, and the number of high-consumption devices is counted; When the number of high-consumption equipment is greater than the preset number of equipment, the operation of the mixing equipment is classified as a high-consumption type.

4. The automatic mixing control system for plastic manufacturing according to claim 3, characterized in that: The power level of each mixing device is adjusted, and the specific adjustment process is as follows: The quantity of various raw materials is obtained from the preset raw material ratio scheme corresponding to each mixing device, and the stirring image corresponding to each mixing device is collected at the same time. The uniformity of the raw materials in each mixing device is obtained by using machine vision technology, and according to the actual power and operating temperature of each mixing device, it is analyzed whether there is a mixing device that can be suspended. If so, the mixing devices that can be suspended are suspended, and the mixing devices that cannot be suspended are recorded as adjustment devices; Extract the adjustment of each regulating device from the default operating power gear to each low power gear from the historical mixing data of each regulating device, record it as each adjustment, and then extract the raw material ratio scheme, pre-adjustment raw material uniformity and mixed quality characteristic value of each adjustment of each regulating device from the historical mixing data of each regulating device; Compare the raw material ratio scheme of each adjustment of each adjustment device with the preset raw material ratio scheme, select each adjustment with the same raw material ratio scheme as the preset raw material ratio scheme as each marked adjustment, and obtain the low power gear, pre-adjustment raw material uniformity and mixed quality characteristic value corresponding to each marked adjustment, analyze the stirring characteristic value corresponding to each marked adjustment of each adjustment device, select the low power gear of the first marked adjustment corresponding to the stirring characteristic value in each adjustment device as the adjustment power gear of each adjustment device, and then adjust the power gear of each adjustment device accordingly; When the mixing of a certain regulating device is completed, the restart priority of each mixing device that can be suspended is obtained, and the mixing device with the first restart priority is restarted. According to the adjustment power level analysis method of each regulating device, the adjustment power level of the mixing device with the first restart priority is obtained, and then corresponding adjustments are made. In this way, the adjustment of the power level of each mixing device is completed.

5. The automatic mixing control system for plastic manufacturing according to claim 4, characterized in that: The specific process of analyzing whether there is mixing equipment that can be suspended is as follows: Calculate the difference between the quantities of various raw materials in the preset raw material ratio scheme corresponding to each mixing equipment, and select the maximum weight difference as the raw material weight difference in each mixing equipment, recorded as G i , i represents the number of each mixing equipment, i is a positive integer, and the uniformity, actual power and operating temperature of the raw materials in each mixing equipment are recorded as JY i , P i and T i ; Using the analytical formula: Get the operating characteristic value of the i-th mixing equipment Wherein, G, JY, P, and T represent the preset weight difference threshold, average uniformity, preset power, and preset duration, respectively; When the operating characteristic values ​​of all mixing devices are 0, it indicates that there is no mixing device that can be suspended; when there is at least one mixing device with an operating characteristic value of 1, it indicates that there is a mixing device that can be suspended, and each mixing device with an operating characteristic value of 1 is a mixing device that can be suspended.

6. The automatic mixing control system for plastic manufacturing according to claim 5, characterized in that: The analysis process of the stirring characteristic value corresponding to each mark adjustment of each adjustment device is as follows: The uniformity and mixed quality characteristic values ​​of the raw materials before adjustment corresponding to each mark adjustment of each adjustment equipment are recorded as JY iq and a3 iq , q represents the number of each mark adjustment, q is a positive integer, substitute into the analysis formula: Get the stirring characteristic value corresponding to the qth mark adjustment of the i-th adjustment device Where a3 i It represents the average value of the mixed characteristic value corresponding to the mark adjustment of the i-th regulating device, and e is a natural constant.

7. The automatic mixing control system for plastic manufacturing according to claim 1, characterized in that: The quality of each mixing equipment after mixing is tested, and the specific process is as follows: Randomly sample the mixture after mixing by each mixing device to obtain each sample of the mixture of each mixing device, divide each sample into three parts, use a viscosity sensor, a hardness sensor and a densitometer to test the viscosity, hardness and density of the three parts respectively, and obtain the viscosity, hardness and density corresponding to each sample; The viscosity, hardness and density of each sample in the mixture of each mixing equipment are used to calculate the mixed quality characteristic value of each mixing equipment, and to judge whether the mixing quality of each mixing equipment is qualified.

8. The automatic mixing control system for plastic manufacturing according to claim 7, characterized in that: The calculation process of the mixed material characteristic value of each mixing device is as follows: The expected viscosity, expected hardness, expected density, allowable viscosity difference, allowable hardness difference and allowable density difference of each mixing equipment corresponding to the preset raw material ratio scheme are obtained from the mixing plan table, and are recorded as ND i , YD i , i , ΔND i , ΔYD i and Δρ i , i represents the number of each mixing equipment, i is a positive integer, and the viscosity, hardness and density of each sample in the mixture of each mixing equipment are recorded as ND ik , YD ik and ρ ik , k represents the number of each sample, k is a positive integer; Using the calculation formula: Get the mixed material characteristic value a3′ of the i-th mixing equipment i , where v1 ik 、v2 ik They represent the mass conformity coefficient and mass uniformity coefficient of the kth sample in the ith mixture, and s represents the number of samples; e represents a natural constant.

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