Film covering control method and device for injection molding finished product

Abstract

The invention provides a film covering control method and device for an injection molding finished product, and relates to the technical field of film covering control, and the method comprises the following steps: reading a first characteristic and a film characteristic of the finished product, determining a control constraint condition, reading a bottom layer control mechanism, training a limiting decision maker and a curing decision maker, and identifying a film covering quality standard and a covering layer number. Interactively fusing a single decision scheme, determining a film covering strategy, executing film covering control, establishing a regulation and control plan library, synchronously carrying out film covering monitoring, and carrying out film covering regulation and control management in combination with a digital feedback device. By means of the method, the technical problem that in the prior art, due to the fact that comprehensive consideration of injection molding finished products and thin film characteristics is insufficient, the film laminating strategy lacks pertinence and accuracy, and the product film laminating quality and production efficiency are further affected can be solved, refined control over the film laminating process is achieved, and the product quality and production efficiency are improved.

Description

Technical Field

[0001] This application relates to the technical field of film covering control, and particularly to a method and device for controlling the film covering of injection molding products. Background Art

[0002] With the development of industrial technology, injection molding technology has also been continuously advancing, from the early basic molding to the later advanced technologies such as multi-component injection molding and in-mold assembly injection molding. The development of these technologies has made the application fields of injection molding products wider and the quality higher. In some applications, injection molding products need further protection or beautification treatment, which leads to the film covering process. Film covering is a process of covering a layer of film on the surface of products, which can improve the wear resistance, corrosion resistance, waterproofness and other properties of products, and at the same time can also increase the beauty of products. In the development process of the film covering process, different film covering materials and film covering technologies have emerged continuously. For example, an adhesive is coated on a plastic film through a roll coating device, and then the film is softened by heating through a hot pressing roller, and finally pressed together with the injection molding product to form a protective film covering. This film covering control method can ensure the uniformity and fastness of the film covering and improve the durability of products.

[0003] Currently, when formulating film covering strategies, traditional film covering technologies often do not fully consider the geometric characteristics, material characteristics and surface characteristics of injection molding products, as well as the unique properties of the film. This lack of personalized film covering treatment may lead to poor film covering effects, such as the appearance of bubbles, wrinkles or loose fitting, thus affecting the overall quality and appearance of products. At the same time, inappropriate film covering strategies may also increase production time and costs and reduce production efficiency.

[0004] In summary, the existing technology has insufficient comprehensive consideration of the characteristics of injection molding products and films, resulting in the lack of pertinence and accuracy of film covering strategies, and further affecting the technical problems of product film covering quality and production efficiency. Summary of the Invention

[0005] The purpose of this application is to provide a method and device for controlling the film covering of injection molding products, so as to solve the technical problems that the existing technology has insufficient comprehensive consideration of the characteristics of injection molding products and films, resulting in the lack of pertinence and accuracy of film covering strategies, and further affecting the product film covering quality and production efficiency.

[0006] In view of the above problems, this application provides a method and device for controlling the film covering of injection molding products.

[0007] In a first aspect, the present application provides a film covering control method for injection molded products, and the method is implemented through a film covering control device for injection molded products. Among them, the method includes: reading the first characteristics of the injection molded products and the film characteristics of the pre-coated film, where the first characteristics include geometric characteristics, material characteristics, and surface characteristics; determining control constraint conditions based on the first characteristics and the film characteristics; reading the underlying control mechanism of the injection molding machine, combining the control constraint conditions, training the limit decision maker and the curing decision maker, and integrating and collaborating to generate a film covering decision model; identifying the film covering quality standard and the number of coating layers, and transmitting back the film covering scenario factors, and combining the film covering decision model to perform independent analysis and verification of the decision maker, interactively integrating individual decision-making schemes, and determining the film covering strategy. Among them, the film covering strategy has a hierarchical stage identifier, and the number of coating layers is one or more; transmitting the film covering strategy to the film covering control system to execute the full-cycle film covering control of the film covering machine; constructing a regulation pre-plan library in dynamic film covering, and establishing a communication connection between the regulation pre-plan library, the digital feedback device, and the film covering control system; synchronously performing film covering monitoring, and combining the digital feedback device to perform film covering regulation management.

[0008] In a second aspect, the present application also provides a film covering control device for injection molded products, which is used to execute a film covering control method for injection molded products as described in the first aspect. Among them, the device includes: a finished product characteristic reading module, which is used to read the first characteristics of the injection molded products and the film characteristics of the pre-coated film, where the first characteristics include geometric characteristics, material characteristics, and surface characteristics; a constraint condition determination module, which is used to determine control constraint conditions based on the first characteristics and the film characteristics; a decision model acquisition module, which is used to read the underlying control mechanism of the injection molding machine, combine the control constraint conditions, train the limit decision maker and the curing decision maker, and integrate and collaborate to generate a film covering decision model; a film covering strategy acquisition module, which is used to identify the film covering quality standard and the number of coating layers, and transmit back the film covering scenario factors, and combine the film covering decision model to perform independent analysis and verification of the decision maker, interactively integrating individual decision-making schemes, and determining the film covering strategy. Among them, the film covering strategy has a hierarchical stage identifier, and the number of coating layers is one or more; a film covering control module, which is used to transmit the film covering strategy to the film covering control system to execute the full-cycle film covering control of the film covering machine; a pre-plan library construction module, which is used to construct a regulation pre-plan library in dynamic film covering, and establish a communication connection between the regulation pre-plan library, the digital feedback device, and the film covering control system; a regulation management module, which is used to synchronously perform film covering monitoring, and combine the digital feedback device to perform film covering regulation management.

[0009] One or more technical solutions provided in the present application have at least the following technical effects or advantages: By reading the first characteristics of the injection-molded finished product and the film characteristics of the pre-coated film, the first characteristics include geometric characteristics, material characteristics, and surface characteristics; based on the first characteristics and the film characteristics, determine the control constraints; read the underlying control mechanism of the injection molding machine, combine the control constraints, train the limit decision maker and the curing decision maker, and generate an integrated collaborative film covering decision model; identify the film covering quality standard and the number of coating layers, and transmit back the film covering scenario factors, and conduct independent analysis and verification of the decision maker in combination with the film covering decision model, interactively fuse single decision-making schemes, and determine the film covering strategy, where the film covering strategy has a hierarchical stage identifier, and the number of coating layers is one or more layers; transmit the film covering strategy to the film covering control system to execute the full-cycle film covering control of the film covering machine; construct a regulation plan library in the dynamic film covering process, and establish a communication connection between the regulation plan library, the digital feedback device, and the film covering control system; synchronously conduct film covering monitoring, and conduct film covering regulation management in combination with the digital feedback device, effectively solving the technical problem that the prior art lacks comprehensive consideration of the characteristics of injection-molded finished products and films, resulting in the lack of pertinence and accuracy of the film covering strategy, and further affecting the film covering quality and production efficiency of products, realizing the refined control of the film covering process, and improving the product quality and production efficiency.

[0010] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of the present application more obvious and understandable, the following specifically gives the specific implementation manners of the present application. It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become easily understandable through the following description. Description of the Drawings

[0011] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0012] Figure 1 It is a schematic flowchart of a film covering control method for an injection-molded finished product of the present application; Figure 2 It is a schematic structural diagram of a film covering control device for an injection-molded finished product of the present application.

[0013] Explanation of the Reference Numerals: Finished product characteristic reading module 11, constraint condition determination module 12, decision model acquisition module 13, film laminating strategy acquisition module 14, film laminating control module 15, pre-plan library construction module 16, regulation and management module 17. Detailed implementation manners

[0014] By providing a film laminating control method and device for injection-molded products, the present application solves the technical problem in the prior art that the comprehensive consideration of the characteristics of injection-molded products and films is insufficient, resulting in the lack of pertinence and accuracy of the film laminating strategy, and further affecting the film laminating quality and production efficiency of products, realizes the refined control of the film laminating process, and improves the product quality and production efficiency.

[0015] Next, the technical solutions in the present application will be described clearly and completely with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. It should be understood that the present application is not limited by the example embodiments described herein. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application. In addition, it should be noted that, for the sake of description, only the parts related to the present application are shown in the accompanying drawings rather than all of them.

[0016] Embodiment 1 Please refer to the attached Figure 1 , the present application provides a film laminating control method for injection-molded products, wherein the method is applied to a film laminating control device for injection-molded products, and the method specifically includes the following steps: S1: Read the first characteristics of the injection-molded product and the film characteristics of the pre-coated film, where the first characteristics include geometric characteristics, material characteristics, and surface characteristics; Specifically, the first characteristics of the injection-molded product include geometric characteristics, material characteristics, and surface characteristics. Specifically, the geometric characteristics also include dimensional accuracy, which means the injection-molded product has high dimensional accuracy and stability, and the precise molding of plastics under high temperature and high pressure in the injection molding process. Precise dimensions help ensure the fitting degree during film lamination and the aesthetics of the final product. Shape complexity means that injection molding can achieve the manufacture of products with complex shapes. Different shapes may affect the difficulty and effect of film lamination, so it is necessary to fully evaluate the geometric shape of the product before film lamination. The material characteristics also include plastic types, which means that various plastic materials such as ABS, PC, PE, PP, etc. can be used in injection molding. Different materials have different physical and chemical properties, which will affect the selection of film lamination materials and the parameter settings of the film lamination process. Material properties refer to the properties of plastic materials such as hardness, toughness, heat resistance, and chemical stability, which have an important impact on the film lamination effect. For example, softer plastics may be more easily adhered to the film lamination material, while harder plastics may require higher temperature and pressure to achieve good film lamination effects. The surface characteristics also include surface finish, which means that the surface finish of the injection-molded product directly affects the quality and appearance of film lamination. A smooth surface is more likely to achieve a uniform film lamination effect, while a rough surface may cause bubbles or unevenness in film lamination. Surface treatment, some injection-molded products may require surface treatment such as spraying, electroplating, etc. to increase aesthetics or improve performance. These surface treatment measures may affect the adhesion and durability of film lamination. The film characteristics of the pre-coated film include material composition. The pre-coated film is usually made of polymer materials such as polyester, and has good transparency and mechanical strength. Thickness and uniformity, the thickness and uniformity of the film have a significant impact on the film lamination effect. An overly thin film may be easily damaged, while an overly thick film may affect the appearance and performance of the product.

[0017] S2: Determine the control constraints based on the first characteristics and the film characteristics; Specifically, the control constraints are to select appropriate film size and shape according to the size and shape of the injection-molded product to ensure that the film can completely cover the surface of the product and leave appropriate margins for easy operation and fitting. The film material should be compatible with the plastic material of the injection-molded product to avoid chemical reactions or damage to the surface of the product. The film should have good adhesion and be able to closely adhere to the surface of the injection-molded product without leaving gaps or bubbles. According to the thickness and uniformity of the film, adjust parameters such as the pressure, temperature, and speed of the film laminator to ensure that the film can be evenly and smoothly adhered to the surface of the product. The selected film should have good weather resistance and chemical stability to adapt to the usage environment that the injection-molded product may face. The film should be easy to operate and handle, facilitating the film lamination operation by workers on the production line.

[0018] S3: Read the underlying control mechanism of the injection molding machine, combine the control constraint conditions, train the limit decision maker and the curing decision maker, and integrate and cooperate to generate a film covering decision model; Specifically, the underlying control of the injection molding machine includes the motion control, temperature control, pressure control, etc. of the injection molding machine. It is obtained by communicating with the technical documents, API interfaces provided by the injection molding machine manufacturer or directly with the control system of the injection molding machine. Extract the key control parameters related to the film covering process from the underlying control mechanism of the injection molding machine, such as injection speed, injection pressure, mold temperature, mold opening and closing speed, etc. These parameters will directly affect the quality and efficiency of the film covering. Combine the control constraint conditions, such as geometric matching, material compatibility, surface adhesion, etc. with the control parameters of the injection molding machine. Quantify each constraint condition so that it can be associated with the control parameters of the injection molding machine. Based on the control constraint conditions and the control parameters of the injection molding machine, train a limit decision maker. This decision maker can judge whether the current control parameters meet all the constraint conditions and give adjustment suggestions or limit instructions accordingly. For example, if the injection speed is too fast, it may cause uneven film adhesion, and the limit decision maker will give a suggestion to reduce the injection speed. The curing decision maker is mainly responsible for judging whether the curing process after film covering reaches the best effect according to the real-time state and control parameters of the injection molding machine. This requires considering multiple factors such as curing time, temperature, pressure, etc. Through training, the curing decision maker can learn the best curing conditions and give adjustment suggestions accordingly. Integrate the limit decision maker and the curing decision maker to form a film covering decision model that works in cooperation. This model can give the best film covering control strategy according to the real-time state and control parameters of the injection molding machine, while considering multiple constraint conditions.

[0019] S4: Identify the film covering quality standards and the number of coating layers, and transmit back the film covering scenario factors. Combine with the film covering decision model to conduct independent analysis and verification of the decision maker, interactively fuse the single decision-making schemes, and determine the film covering strategy, where the film covering strategy has a hierarchical stage identifier, and the number of coating layers is one layer or multiple layers; Specifically, the film coating quality standards include glossiness, adhesion, abrasion resistance, weather resistance, etc. The number of coating layers may be one or multiple layers. For multiple-layer film coatings, the compatibility and interaction between layers need to be considered. Relevant factors of the film coating scenario, such as environmental temperature, humidity, the skill level of operators, equipment condition, etc., are transmitted back to the decision-making model. Based on the control constraints and the control parameters of the injection molding machine, it is analyzed whether film coating can be carried out under the current conditions and how to carry out film coating. For example, if the environmental temperature is too low, it may cause poor adhesion of the film, and the limit decision-maker will give a warning or adjustment suggestions. The curing decision-maker analyzes whether the curing process achieves the best effect according to the curing conditions, such as time, temperature, pressure, etc. and the characteristics of the film coating material. The curing decision-maker will give suggestions on adjusting the curing conditions to ensure the film coating quality. The output results of the limit decision-maker and the curing decision-maker are interactively integrated. This includes weighing the suggestions and limitations between different decision-makers to form a comprehensive and feasible film coating plan. Determine the final film coating strategy. This strategy includes specific operation steps, control parameter settings, expected effects, etc. At the same time, considering the hierarchical and phased nature of the film coating process, the strategy should include hierarchical and phased identifiers to guide operators to take corresponding measures at different film coating stages. Hierarchical nature, if multiple-layer film coating is adopted, the material, thickness, curing conditions, etc. of each layer need to be clarified, and the compatibility and stability between layers should be ensured. Phased nature, the entire film coating process is divided into different stages, such as the preparation stage, the bonding stage, the curing stage, etc., and clear goals and operation guidelines are set for each stage.

[0020] S5: Transmit the film coating strategy to the film coating control system to perform full-cycle film coating control of the film coating machine; Specifically, the laminating strategy is transmitted to the central processing unit or programmable logic controller of the laminating control system through an appropriate interface, such as a network interface, a USB interface, or other data communication methods. After receiving the strategy, the laminating control system parses and stores it in the system memory. According to the hierarchical stage identifier in the laminating strategy, the laminating control system performs initialization settings and configures corresponding parameters, such as temperature, pressure, speed, time, etc. Check and ensure that all sensors and actuators, such as heaters, pressure valves, motors, etc., are in normal working condition. According to the strategy, the control system automatically adjusts various parameters of the laminating machine to the preset values, and at the same time prepares the required film materials and other auxiliary materials. Under the precise control of the control system, the laminating machine starts to attach the film to the injection-molded finished product. During this stage, the control system will monitor the attachment process in real time to ensure the tight attachment of the film to the surface of the finished product and avoid the generation of bubbles or wrinkles. After the attachment is completed, it enters the curing stage. The control system precisely controls the heating elements and pressure devices according to the curing conditions set in the strategy, such as temperature, time, and pressure, to ensure the firm adhesion between the film and the finished product. After the curing is completed, the control system will automatically enter the cooling stage to reduce the temperature of the product and the film and prevent poor adhesion caused by thermal expansion and contraction. After the cooling is completed, the excess film is automatically peeled off. After the end of each stage, the control system will conduct quality inspections, such as checking whether the lamination is flat and whether there are bubbles. This information will be fed back to the control system for necessary adjustments and optimizations.

[0021] S6: Construct a regulation plan library in dynamic lamination and establish a communication connection between the regulation plan library, the digital feedback device, and the laminating control system; Specifically, the plans are divided into different categories, such as temperature control plans, pressure control plans, material compatibility plans, etc. For each category, specific regulation plans are compiled. For example, in the temperature control plan, it includes the measures to be taken when the temperature is too low or too high. Select a suitable communication protocol, such as TCP / IP, Modbus, OPC UA, etc., to ensure smooth communication between the regulation plan library, the digital feedback device, and the laminating control system. The digital feedback device is used to monitor the key parameters in the lamination process in real time and feed back this data to the regulation plan library and the laminating control system. According to the needs of the lamination process, configure the digital feedback device to monitor key parameters such as temperature, pressure, speed, etc. Ensure that the data of the digital feedback device is synchronized with the data of the laminating control system and perform calibration regularly to improve the accuracy of the data.

[0022] S7: Synchronously conduct lamination monitoring and combine the digital feedback device to conduct lamination regulation management.

[0023] Specifically, a digital feedback device is used to monitor in real time the key parameters during the film laminating process, such as temperature, pressure, speed, and the fitting condition of the film, etc. After receiving the real-time data, the film laminating control system will compare it with the preset standard values or historical data. Through the comparison, any situation deviating from the standard can be identified, such as abnormal temperature, insufficient pressure, or poor film fitting, etc. Once an abnormal situation is detected, the film laminating control retrieves the corresponding plan from the regulation plan library. According to the plan, automatic regulation is carried out, such as adjusting parameters such as temperature, pressure, or speed, to correct the deviation in the film laminating process.

[0024] Furthermore, step S2 of this application further includes: Identifying the geometric characteristics of the injection-molded finished product and determining the key spatial positioning points; Identifying the film size based on the film characteristics, and determining the first constraint condition based on the spatial positioning points and the film utilization rate, where the film utilization rate needs to be higher than the critical threshold standard; Based on the material characteristics, surface characteristics, and adhesive characteristics, determining the second constraint condition, where the material characteristics include the injection-molded finished product and the pre-coated film, and the second constraint condition is a critical parameter control constraint for measuring material denaturation; Based on the first constraint condition and the second constraint condition, determining the control constraint condition.

[0025] Specifically, conduct a detailed analysis of the shape, size, and surface structure of the injection-molded finished product. Determine the key spatial positioning points of the finished product, which are the characteristic positions such as protrusions, grooves, and edges on the finished product. According to the characteristics of the film such as material, thickness, and elasticity, determine the appropriate film size. Combine the spatial positioning points of the injection-molded finished product and calculate the utilization rate of the film during the film laminating process. Set the critical threshold standard for the film utilization rate to ensure that the utilization rate of the film is higher than this standard during the actual film laminating process, thereby forming the first constraint condition. This helps to reduce material waste and improve economic benefits. Analyze the material characteristics of the injection-molded finished product and the pre-coated film, such as hardness, toughness, and thermal stability. According to the surface characteristics of the finished product and the film, such as roughness, hydrophilicity / hydrophobicity, etc., these characteristics will affect the selection of the adhesive and the adhesion effect. Combine the characteristics of the adhesive, such as viscosity, curing speed, and adhesion strength, to evaluate the stability and reliability of the adhesion process. Based on the above material characteristics, surface characteristics, and adhesive characteristics, determine a critical parameter control constraint for measuring material denaturation, that is, the second constraint condition. This condition will ensure that during the film laminating process, the material will not undergo unacceptable deformation or damage. Combine the first constraint condition and the second constraint condition to form a comprehensive set of control constraint conditions. These constraint conditions will guide all aspects of the film laminating process, including steps such as film selection, cutting, positioning, and adhesion.

[0026] Furthermore, this application further includes: Identify the first constraint condition, and in combination with the limit decision maker, perform film limit optimization based on film utilization rate to determine a film utilization plan, where the optimization criterion is forward iteration and backward retraction; In combination with the film utilization plan, perform coaxial control limit on the injection-molded product, the film laminating mechanism component, and the pre-laminated film based on the spatial positioning points to determine a limit strategy, and the limit strategy is a dynamic strategy for the entire cycle of finished product film lamination.

[0027] Specifically, with the goal of improving film utilization rate, ensure that the utilization rate is higher than the set critical threshold standard. Adopt the optimization criteria of forward iteration and backward retraction. If a certain plan can improve the film utilization rate, continue to iterate along this optimization direction; if a certain plan leads to a decrease in utilization rate, retreat to the previous plan. The limit decision maker provides decision support for the optimization process based on the current film utilization rate and the first constraint condition, guiding the optimization direction. Through the optimization process, a film utilization plan that meets the first constraint condition and has a film utilization rate higher than the critical threshold can be obtained. It includes detailed regulations on how to cut, position, and use the film to ensure the optimal utilization rate of the film during the film lamination process. Based on the above film utilization plan and the spatial positioning points of the injection-molded product, perform precise coaxial control limit on the injection-molded product, the film laminating mechanism component, and the pre-laminated film. This ensures that during the film lamination process, each component can be precisely aligned, avoiding waste and misalignment of the film. Combining the film utilization plan and the results of coaxial control limit, a dynamic limit strategy can be determined. This strategy will run through the entire cycle of finished product film lamination, dynamically adjusting the limit method and parameters according to the actual situation to ensure the smooth progress of the film lamination process and the efficient utilization of the film.

[0028] Furthermore, this application also includes: Identify the second constraint condition, perform interval analysis on the film lamination operation and the curing operation to determine the operation interval; In combination with the curing decision maker, perform non-uniform temperature management decision on the curing temperature to determine a curing temperature control strategy, where the temperature management criterion is uniform axial distribution, stable longitudinal temperature change trend, and the temperature change trend is determined based on the time sequence of the film lamination position; Based on the operation interval and the temperature control strategy, determine a curing strategy; Among them, the non-uniform temperature management includes: Determine the change trend of the curing temperature control, and the change trend identifies the temperature change nodes in the entire curing cycle; Based on the change trend, perform temperature distribution management decision based on the initial curing time node.

[0029] Specifically, the second constraint condition is the critical parameter control constraint for material denaturation, which includes the material properties, surface properties, and adhesive properties of the injection-molded product and the pre-coated film. Then, an interval analysis of the film laminating operation and the curing operation is carried out. This interval needs to ensure that the adhesive can flow sufficiently and be evenly distributed between the two materials, while avoiding excessive curing or failure of the adhesive due to too long waiting time. Determine a suitable operation interval. Combine with the curing decision maker to make a decision on non-uniform temperature management of the curing temperature. The goal here is to ensure uniform distribution and stable change of temperature during the curing process to avoid material denaturation and stress concentration caused by uneven temperature or sharp temperature change. The standard for temperature management is uniform distribution in the axial direction and stable longitudinal temperature change trend. Along the axial direction of the product, the temperature should be kept uniform; in the longitudinal direction, the trend of temperature change should be stable and determined based on the time sequence of the film laminating position. By analyzing the temperature change nodes in the entire curing cycle, determine the change trend of the curing temperature control. These nodes identify the key points of temperature change during the curing process. Based on the above change trend, make a decision on the temperature distribution management of the initial curing time node, which includes determining parameters such as the initial curing temperature, heating rate, constant temperature time, and cooling rate. Integrate the operation interval and the temperature control strategy to formulate the final curing strategy, which includes the time interval from the completion of the film laminating operation to the start of the curing operation, the temperature curve of curing, including the heating, constant temperature, and cooling stages, and other relevant parameters during the curing process.

[0030] Furthermore, this application also includes: Based on the operation interval, cross-cooperate the limit strategy and the curing temperature control strategy to determine the film laminating strategy; If the number of coating layers is multiple, combine with the adhesive properties to conduct an analysis of the inter-layer mutual influence of the pre-coated film, locate the inter-layer influence characteristics, and the inter-layer influence characteristics are the differential characteristics between the injection-molded product and the pre-coated film layers and between the pre-coated film layers; Based on the inter-layer influence characteristics, adjust the film laminating strategy to determine the multi-layer film laminating strategy.

[0031] Specifically, cross - coordination is carried out between the limit strategy and the curing temperature control strategy. During the film - covering process, it is necessary to ensure the precise positioning of the film to meet the requirements of geometric characteristics and film utilization rate, and at the same time, ensure that the curing operation is carried out within a suitable operation interval to achieve the best material properties. Through this cross - coordination, a preliminary film - covering strategy can be formulated, which will include detailed regulations for each link such as film cutting, positioning, film - covering, limiting, and curing. If the number of coating layers is multiple, the inter - layer influence needs to be considered particularly. At this time, combined with the characteristics of the adhesive, the inter - layer mutual influence analysis of the pre - coated film is carried out. The choice of adhesive will directly affect the inter - layer bonding strength and stability. Through analysis, the inter - layer influence characteristics can be located, that is, the differential characteristics between the injection - molded product and the pre - coated film layer, as well as between the pre - coated film layers. These characteristics may include bonding strength, coefficient of thermal expansion, material hardness, etc. Based on the above - mentioned inter - layer influence characteristics, the preliminary film - covering strategy needs to be adjusted. This includes adjusting the choice of adhesive, changing the film stacking order, optimizing the curing temperature and time, etc. The goal of the adjustment is to ensure the bonding strength and stability between multiple - layer film - covering while meeting the requirements of product performance and appearance. The adjusted film - covering strategy will become the final multi - layer film - covering strategy, which will guide the whole process of multi - layer film - covering, ensuring that each layer of film can be precisely covered on the injection - molded product and good bonding can be formed between layers.

[0032] Furthermore, step S7 of this application further includes: Transmitting back the film - covering monitoring data, measuring the deviation of the film - covering monitoring data, and determining the deviation characteristics; Setting an error threshold, and based on the error threshold, making an over - limit determination for the deviation characteristics to determine the over - limit determination result; Based on the over - limit determination result, combined with the digital feedback device for film - covering feedback control, wherein the digital feedback device is configured with an error self - adjustment rule.

[0033] Specifically, during the film laminating process, monitoring data related to film laminating, such as temperature, pressure, film position, etc., is collected in real time through various sensors. These data are transmitted back to the control system for analysis and processing. The transmitted film laminating monitoring data is compared with preset standard values or historical data to calculate the deviation. Analyze these deviations to determine the characteristics of the deviations, such as the magnitude, direction, and change trend of the deviations. According to the requirements of the film laminating process and product quality standards, set a reasonable error threshold. Compare the calculated deviation with the error threshold to perform an overrun determination. If the deviation exceeds the error threshold, it is determined as an overrun. According to the overrun determination result, take corresponding measures. If it is determined as an overrun, immediate adjustment is required to correct the deviation. Input the overrun determination result into the digital feedback device. For control errors, such as deviations caused by the service status of the equipment, error correction and feedback adjustment are performed based on the digital feedback device; if it is an abnormal deviation beyond the limit, it indicates that there may be external inducements, faults and other factors. First, perform pre-plan regulation to avoid interruption or quality abnormalities; at the same time, give an early warning for traceability and management. These instructions are sent to the film laminating equipment to adjust parameters such as temperature, pressure, and speed, so as to correct the deviation and bring the film laminating process back to the normal state.

[0034] Furthermore, this application also includes: If the overrun determination result is negative, calibrate the system control error in combination with the digital feedback device, and perform one-dimensional feedback regulation in response to the film laminating control system; If the overrun determination result is positive, traverse the regulation pre-plan library to match the target feedback pre-plan and give an alarm, and perform two-dimensional feedback regulation in response to the film laminating control system based on the digital feedback device.

[0035] Specifically, if the overrun determination result is negative, that is, although the current deviation is within the normal range, there may still be a certain system control error. In this case, calibrate the system control error in combination with the digital feedback device. This includes fine-tuning the parameters of the system to reduce the deviation between the actual output and the expected output. After calibration, perform one-dimensional feedback regulation in response to the film laminating control system. One-dimensional feedback regulation mainly refers to adjusting one or a few key parameters of the system according to the current deviation value, so that the system output is closer to the expected value. If the overrun determination result is positive, it means that the current deviation has exceeded the acceptable range, and more urgent and comprehensive regulation measures need to be taken. At this time, traverse the regulation pre-plan library to find the target feedback pre-plan that matches the target deviation characteristics. After finding the matching pre-plan, the system will give an alarm to notify the operator of the current abnormal situation. Next, based on the digital feedback device, perform two-dimensional feedback regulation on the film laminating control system. Two-dimensional feedback regulation refers to adjusting multiple parameters of the system simultaneously to quickly bring the system state back to the normal range.

[0036] In summary, the film covering control method for injection-molded products provided by the present application has the following technical effects: By reading the first characteristics of the injection-molded product and the film characteristics of the pre-coated film, the first characteristics include geometric characteristics, material characteristics, and surface characteristics; based on the first characteristics and the film characteristics, determine the control constraint conditions; read the underlying control mechanism of the injection molding machine, combine the control constraint conditions, train the limit decision-making device and the curing decision-making device, and generate an integrated collaborative film covering decision model; identify the film covering quality standard and the number of coating layers, and transmit back the film covering scenario factors, and combine the film covering decision model to perform independent analysis and verification of the decision-making device, interactively integrate single decision-making schemes, and determine the film covering strategy, where the film covering strategy has a hierarchical stage identifier, and the number of coating layers is one or more layers; transmit the film covering strategy to the film covering control system to execute the full-cycle film covering control of the film covering machine; construct a regulation plan library in the dynamic film covering, and establish a communication connection between the regulation plan library, the digital feedback device, and the film covering control system; synchronously perform film covering monitoring, and combine the digital feedback device to perform film covering regulation management, effectively solving the technical problem that the prior art lacks comprehensive consideration of the characteristics of injection-molded products and films, resulting in the lack of pertinence and accuracy of the film covering strategy, and further affecting the film covering quality and production efficiency of products, realizing the refined control of the film covering process, and improving the product quality and production efficiency.

[0037] Embodiment 2 Based on the film covering control method for injection-molded products in the foregoing embodiment, with the same inventive concept, the present application further provides a film covering control device for injection-molded products. Please refer to the attached Figure 2 , The device includes: A finished product characteristic reading module 11, which is used to read the first characteristics of the injection-molded product and the film characteristics of the pre-coated film, and the first characteristics include geometric characteristics, material characteristics, and surface characteristics; A constraint condition determination module 12, which is used to determine control constraint conditions based on the first characteristics and the film characteristics; A decision model acquisition module 13, which is used to read the underlying control mechanism of the injection molding machine, combine the control constraint conditions, train the limit decision-making device and the curing decision-making device, and generate an integrated collaborative film covering decision model; A film covering strategy acquisition module 14, which is used to identify the film covering quality standard and the number of coating layers, and transmit back the film covering scenario factors, and combine the film covering decision model to perform independent analysis and verification of the decision-making device, interactively integrate single decision-making schemes, and determine the film covering strategy, where the film covering strategy has a hierarchical stage identifier, and the number of coating layers is one or more layers; The film covering control module 15 is configured to transmit the film covering strategy to the film covering control system to perform full-cycle film covering control of the film covering machine; The pre-plan library construction module 16 is configured to construct a regulation pre-plan library in dynamic film covering and establish communication connections among the regulation pre-plan library, the digital feedback device, and the film covering control system; The regulation management module 17 is configured to synchronously perform film covering monitoring and perform film covering regulation management in combination with the digital feedback device.

[0038] Furthermore, the constraint condition determination module 12 in the device is further configured to: Identify the geometric characteristics of the injection-molded finished product and determine the key spatial positioning points; Identify the film size based on the film characteristics, and determine the first constraint condition based on the spatial positioning points and the film utilization rate, where the film utilization rate needs to be higher than the critical threshold standard; Determine the second constraint condition based on the material characteristics, surface characteristics, and adhesive characteristics, where the material characteristics include the injection-molded finished product and the pre-coated film, and the second constraint condition is a critical parameter control constraint for measuring material denaturation; Determine the control constraint condition based on the first constraint condition and the second constraint condition.

[0039] Furthermore, the device further includes a dynamic strategy acquisition module, and the dynamic strategy acquisition module is configured to: Identify the first constraint condition, and in combination with the limit decision maker, perform film limit optimization based on the film utilization rate to determine the film utilization plan, where the optimization criteria are forward iteration and backward return; In combination with the film utilization plan, perform coaxial control limit on the injection-molded finished product, the film covering mechanism components, and the pre-coated film based on the spatial positioning points to determine the limit strategy, and the limit strategy is a dynamic strategy for the full cycle of finished product film covering.

[0040] Furthermore, the device further includes a curing strategy acquisition module, and the curing strategy acquisition module is configured to: Identify the second constraint condition, perform interval analysis of the film covering operation and the curing operation to determine the operation interval; In combination with the curing decision maker, perform non-uniform temperature management decision on the curing temperature to determine the curing temperature control strategy, where the temperature management standard is axial uniform distribution, stable longitudinal temperature change trend, and the temperature change trend is determined based on the time sequence of the film covering position; Determine the curing strategy based on the operation interval and the temperature control strategy; Among them, the non-uniform temperature management includes: Determine the changing trend of the curing temperature control, and the changing trend identifies the temperature change nodes in the entire curing cycle; Based on the changing trend, make a temperature distribution management decision based on the initial curing time node.

[0041] Furthermore, the device further includes a multi-layer film covering strategy acquisition module, and the multi-layer film covering strategy acquisition module is used for: Based on the operation interval, cross-cooperate the limit strategy and the curing temperature control strategy to determine the film covering strategy; If the number of coating layers is multiple, combine the adhesive characteristics to perform an analysis of the inter-layer mutual influence of the pre-coated film, and locate the inter-layer influence characteristics, where the inter-layer influence characteristics are the differential characteristics between the injection-molded product and the pre-coated film layer and between the pre-coated film layers; Based on the inter-layer influence characteristics, adjust the film covering strategy to determine the multi-layer film covering strategy.

[0042] Furthermore, the regulation management module 17 in the device is further used for: Transmit back the film covering monitoring data, perform deviation measurement on the film covering monitoring data, and determine the deviation characteristics; Set an error threshold, and based on the error threshold, perform an overrun determination on the deviation characteristics to determine the overrun determination result; Based on the overrun determination result, combine the digital feedback device to perform film covering feedback control, where the digital feedback device is configured with an error self-adjustment rule.

[0043] Furthermore, the device further includes a two-dimensional feedback regulation module, and the two-dimensional feedback regulation module is used for: If the overrun determination result is negative, combine the digital feedback device to calibrate the system control error, and respond to the film covering control system to perform one-dimensional feedback regulation; If the overrun determination result is positive, traverse the regulation plan library to match the target feedback plan and give an alarm, and based on the digital feedback device, respond to the film covering control system to perform two-dimensional feedback regulation.

[0044] Each embodiment in this specification is described in a progressive manner, and the key point of each embodiment is to illustrate the differences from other embodiments. The foregoing Figure 1The film covering control method and specific example in the first embodiment are equally applicable to the film covering control device for an injection-molded product in this embodiment. Through the detailed description of the film covering control method for an injection-molded product above, those skilled in the art can clearly know the film covering control device for an injection-molded product in this embodiment. Therefore, for the sake of brevity of the specification, it will not be described in detail here. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0045] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0046] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalent technologies, the present application is also intended to include these changes and modifications.

Claims

1. A method for controlling the coating of an injection molded finished product, characterized in that: The method comprises: Reading the first characteristics of the injection molded product and the film characteristics of the pre-coated film, wherein the first characteristics include geometric characteristics, material characteristics and surface characteristics; determining a control constraint condition based on the first characteristic and the film characteristic; Read the underlying control mechanism of the injection molding machine, combine the control constraints, train the limit decision maker and the curing decision maker, and perform integrated collaborative generation of a laminating decision model; Identify the lamination quality standard and the number of layers, and transmit back the lamination scenario factors, combine the lamination decision model to perform independent analysis and verification of the decision maker, interactively integrate the single decision plan, and determine the lamination strategy, wherein the lamination strategy has a hierarchical stage identification, and the number of layers is one or more layers; Transmitting the laminating strategy to the laminating control system to execute full-cycle laminating control of the laminating machine; Constructing a control plan library in dynamic lamination, and establishing a communication connection between the control plan library, the digital feedback device and the lamination control system; The film coating is monitored simultaneously, and the film coating regulation and management are performed in combination with the digital feedback device.

2. The method according to claim 1, characterized in that The determining of control constraints based on the first characteristic and the film characteristic includes: Identify the geometric characteristics of the finished product of the injection molding process and determine the key spatial positioning points; Identifying a film size based on the film characteristics, and determining a first constraint condition based on the spatial positioning point and the film utilization rate, wherein the film utilization rate needs to be higher than a critical threshold standard; Determining a second constraint condition based on material properties, surface properties and adhesive properties, wherein the material properties include the injection molded product and the pre-coated film, and the second constraint condition is a critical parameter control constraint for measuring material deformation; The control constraint condition is determined based on the first constraint condition and the second constraint condition.

3. The method according to claim 2, characterized in that Combined with the lamination decision model, the decision maker is independently analyzed, including: Identify the first constraint condition, combine with the limit decision maker, perform film limit optimization based on film utilization, and determine a film utilization plan, wherein the optimization criteria are iteration in the superior direction and retreat in the inferior direction; In combination with the film utilization scheme, the injection molded product, the laminating mechanism components and the pre-laminated film are coaxially controlled and limited based on the spatial positioning points to determine a limiting strategy, which is a dynamic strategy for the entire cycle of the finished product lamination.

4. The method according to claim 3, characterized in that Combined with the lamination decision model, the decision maker is independently analyzed, including: Identify the second constraint condition, perform interval analysis between the laminating operation and the curing operation, and determine the operation interval; Combined with the curing decision maker, a non-uniform temperature management decision of the curing temperature is made to determine the curing temperature control strategy, wherein the temperature management standard is uniform axial distribution, stable longitudinal temperature change trend, and the temperature change trend is determined based on the time sequence of the coating position; Determining a curing strategy based on the operation interval and the temperature control strategy; Wherein, the non-uniform temperature management includes: Determine a change trend of curing temperature control, wherein the change trend identifies a temperature change node of the entire curing cycle; Based on the change trend, a temperature distribution management decision is made based on the initial solidification time node.

5. The method according to claim 4, characterized in that The interactive fusion single decision-making scheme includes: Based on the operation interval, the position limiting strategy and the curing temperature control strategy are cross-coordinated to determine the laminating strategy; If the number of the coating layers is multiple, the interlayer interaction analysis of the pre-coating film is performed in combination with the adhesive properties to locate the interlayer influence characteristics, which are the differentiated characteristics between the injection molded product and the pre-coating film layers, and between the pre-coating film layers; Based on the inter-layer influence characteristics, the lamination strategy is adjusted to determine a multi-layer lamination strategy.

6. The method according to claim 1, characterized in that The film coating control management in combination with the digital feedback device includes: Transmitting back the film coating monitoring data, measuring the deviation of the film coating monitoring data, and determining the deviation characteristics; Setting an error threshold, and based on the error threshold, performing an over-limit determination on the deviation feature, and determining an over-limit determination result; Based on the over-limit determination result, film feedback control is performed in combination with the digital feedback device, wherein the digital feedback device is configured with an error self-adjustment rule.

7. The method according to claim 6, characterized in that Combining the digital feedback device to perform film feedback control includes: If the over-limit determination result is no, the system control error calibration is performed in combination with the digital feedback device, and one-dimensional feedback regulation is performed in response to the film control system; If the over-limit determination result is yes, the control plan library is traversed to match the target feedback plan and an alarm is given, and based on the digital feedback device, two-dimensional feedback control is performed in response to the film control system.

8. A film coating control device for an injection molded finished product, characterized in that: For implementing the steps of the method according to any one of claims 1 to 7, the device comprises: A finished product characteristic reading module, the finished product characteristic reading module is used to read the first characteristic of the injection molded finished product and the film characteristic of the pre-coated film, the first characteristic including geometric characteristics, material characteristics and surface characteristics; a constraint condition determination module, the constraint condition determination module being used to determine a control constraint condition based on the first characteristic and the film characteristic; A decision model acquisition module, which is used to read the underlying control mechanism of the injection molding machine, train the limit decision maker and the curing decision maker in combination with the control constraints, and perform integrated collaborative generation of a laminating decision model; A laminating strategy acquisition module, which is used to identify the laminating quality standard and the number of laminating layers, and to transmit laminating scenario factors back, to independently analyze and verify the decision maker in combination with the laminating decision model, to interactively integrate the individual decision plans, and to determine the laminating strategy, wherein the laminating strategy has a hierarchical stage identification, and the number of laminating layers is one or more layers; A laminating control module, the laminating control module is used to transmit the laminating strategy to the laminating control system to execute full-cycle laminating control of the laminating machine; A plan library construction module, the plan construction module is used to construct a control plan library in dynamic lamination, and establish a communication connection between the control plan library, the digital feedback device and the lamination control system; A control and management module, wherein the control and management module is used to synchronously monitor the film coating and perform film coating control and management in combination with the digital feedback device.

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