Injection molding method, related equipment and storage medium for automobile connector

Abstract

The present application relates to the field of data processing technology, and specifically to an injection molding method, related equipment and storage medium for an automobile connector, and specifically includes: calculating corresponding design prerequisite coefficients based on design parameters of the connector and its mold, determining injection pressures at different filling stages based on change characteristics of monitoring data at different stages in the injection filling process and design prerequisite coefficients, constructing injection speeds at each moment in the initial filling stage based on mean injection pressure differences at adjacent moments in combination with the injection speed at the previous moment of each moment, and calculating injection speeds at the mid-term pressure stabilization stage in combination with the unique injection pressure; performing precise injection molding of automobile connectors according to the injection speeds at each moment in the injection filling process, thereby avoiding the problem that defects in the injection molding results may occur due to differences in the design forms of different connectors when performing injection molding using fixed preset injection molding parameters, preventing defects in finished products, and ensuring the consistency and production efficiency of finished products.

Description

Technical Field

[0001] The present application relates to the field of data processing technology, and in particular to an injection molding method, related equipment and storage medium for an automobile connector. Background Art

[0002] Automotive connectors are electronic components used to connect various electrical systems and components inside and outside the car. Their main function is to ensure stable communication and power transmission between various systems in the car. Connectors have very high requirements for dimensional accuracy. High-precision and high-efficiency injection molding equipment is needed so that manufacturers can produce connector products that meet the strict requirements of the automotive industry. Injection molding technology plays a key role in improving connector production efficiency, reducing costs and improving product performance. Therefore, accurately setting and controlling injection molding parameters can avoid molding defects and ensure product stability and consistency.

[0003] At present, when performing injection molding on automotive connectors, fixed injection molding parameters are generally preset for the injection molding machine. However, since different connectors and corresponding molds may have different design sizes and complexities, fixed injection molding parameters may cause defects when performing injection molding on different connector shapes, and the consistency and production efficiency of the finished product cannot be guaranteed. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of this application is to provide an injection molding method, related equipment and storage medium for an automotive connector. The technical solutions adopted are as follows:

[0005] In a first aspect, an embodiment of the present application provides an injection molding method for an automotive connector, the method comprising the following steps:

[0006] Collect melt temperature data at each moment during the injection filling process of automobile connectors and cavity pressure data at each collection position of the mold;

[0007] Determining the design prerequisite coefficient of the connector based on the material of the connector and the design parameters of the mold; the design parameters include the viscosity of the material used for the connector, the number of cavities of the mold, and the wall thickness at each sampling position of the connector;

[0008] In the initial filling stage, the injection pressure adjustment factor at each moment is calculated based on the difference in the mean pressure in the cavity between two adjacent moments, the difference between the melt temperature at each moment and the initial temperature of the melt, combined with the design prerequisite coefficient; the injection pressure at each moment in the initial filling stage is obtained based on the injection pressure adjustment factor at each moment; in the mid-term pressure stabilization stage, the injection pressure maintenance coefficient is obtained based on the difference in the cavity pressure at different positions of the mold, the volume of the unfilled melt area in the mold, combined with the design prerequisite coefficient, and the injection pressure at the last moment of the initial filling stage is combined to construct the only injection pressure in the mid-term pressure stabilization stage;

[0009] Based on the injection pressure difference between each moment and the previous moment, combined with the injection speed at the previous moment, the injection speed at each moment in the initial filling stage is constructed, and combined with the unique injection pressure, the injection speed in the mid-term pressure stabilization stage is calculated;

[0010] The automotive connector is precisely molded according to the injection speed at each moment in the injection filling process.

[0011] In one embodiment, the process of obtaining the design prerequisite coefficients of the connector is as follows:

[0012] Calculate the difference between the wall thickness at any two sampling positions of the connector, and record it as the first difference;

[0013] The combined value of all the first differences, the viscosity and the number of cavities of the connector is used as a design prerequisite coefficient of the connector.

[0014] In one embodiment, the process of obtaining the injection pressure adjustment factor at each moment is as follows:

[0015] Calculate the ratio between the average pressure in the cavity at each moment and the corresponding previous moment, and record it as the first ratio; calculate the difference between the initial temperature of the melt and the temperature of the melt at each moment, and record it as the temperature difference;

[0016] The fusion value of the first ratio, the temperature difference and the design prerequisite coefficient is used as the injection pressure adjustment factor at each moment in the initial filling stage.

[0017] In one embodiment, the injection pressure at each moment in the initial filling stage is expressed as:

[0018] , where Initial filling stage The injection pressure at the sampling moment, Initial filling stage The injection pressure at the sampling moment, The connector is first filled in the initial stage Injection pressure adjustment factor at each sampling moment.

[0019] In one embodiment, the process of obtaining the injection pressure maintenance coefficient is as follows:

[0020] The difference between the cavity pressures at any two sampling positions of the mold is calculated, which is recorded as the pressure difference; the ratio between the volume of the melt injected into the mold at the end of the initial filling stage and the maximum volume of the mold is calculated, which is recorded as the second ratio, and the difference between the natural number 1 and the second ratio is recorded as the first difference;

[0021] The fusion value of all the pressure differences between all sampling positions of the mold, the first difference and the design prerequisite coefficient of the connector is used as the injection pressure maintenance coefficient in the mid-term pressure stabilization stage.

[0022] In one embodiment, the expression of the only injection pressure in the mid-term pressure stabilization stage is:

[0023] , where It is the only injection pressure in the mid-term pressure stabilization stage. is the injection pressure at the last moment of the initial filling stage, is the injection pressure maintenance coefficient.

[0024] In one embodiment, the injection speed at each moment in the initial filling stage is expressed as:

[0025] , where , are the kth and kth in the initial filling stage respectively. The injection speed at each sampling moment, , are the kth and kth in the initial filling stage respectively. The injection pressure at the sampling moment.

[0026] In one embodiment, the process of obtaining the injection speed in the mid-term pressure stabilization stage is as follows:

[0027] The ratio between the unique injection pressure and the injection pressure at the last sampling moment of the initial filling stage is calculated and recorded as the third ratio; the product of the third ratio and the injection speed at the last sampling moment of the initial filling stage is used as the injection speed in the mid-term pressure stabilization stage.

[0028] In a second aspect, the present application also provides an injection molding device for an automotive connector, including:

[0029] Data acquisition module: collects melt temperature data at each moment during the injection filling process of the automotive connector and cavity pressure data at each acquisition position of the mold;

[0030] Prerequisite analysis module: determining the design prerequisite coefficient of the connector based on the material of the connector and the design parameters of the mold; the design parameters include the viscosity of the material used in the connector, the number of cavities of the mold, and the wall thickness at each sampling position of the connector;

[0031] Injection pressure adjustment module: In the initial filling stage, the injection pressure adjustment factor at each moment is calculated based on the difference in the mean pressure in the cavity between two adjacent moments, the difference between the melt temperature at each moment and the initial temperature of the melt, combined with the design prerequisite coefficient; the injection pressure at each moment in the initial filling stage is obtained based on the injection pressure adjustment factor at each moment; in the mid-term pressure stabilization stage, the injection pressure maintenance coefficient is obtained based on the difference in the cavity pressure at different positions of the mold, the volume of the unfilled melt area in the mold, combined with the design prerequisite coefficient, and the injection pressure at the last moment of the initial filling stage is combined to construct the only injection pressure in the mid-term pressure stabilization stage;

[0032] Injection speed calculation module: based on the injection pressure difference between each moment and the previous moment, combined with the injection speed of the previous moment, the injection speed of each moment in the initial filling stage is constructed, and combined with the unique injection pressure, the injection speed of the mid-term pressure stabilization stage is calculated;

[0033] Automotive connector injection molding module: Accurately inject automotive connectors according to the injection speed at each moment during the injection filling process.

[0034] In a third aspect, an embodiment of the present application further provides an injection molding storage medium for an automotive connector, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor implements the steps of the method described in the first aspect when executing the computer program.

[0035] The embodiments of the present application have at least the following beneficial effects:

[0036] The present application calculates the corresponding design prerequisite coefficients based on the design parameters of the connector and its mold, determines the injection pressures at different filling stages based on the changing characteristics of the monitoring data at different stages in the injection filling process and the design prerequisite coefficients, and improves the accuracy of the melt filling in the injection filling process by setting the injection pressures at different injection filling stages in a graded manner; matches the corresponding injection speeds based on different injection pressures, thereby adaptively adjusting the injection parameters of the filling process, thereby avoiding the problem that defects in the injection molding results may occur due to differences in the design forms of different connectors when injection molding is performed using fixed preset injection molding parameters; reduces the occurrence of defects in finished products, and ensures the consistency and production efficiency of the finished products. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 A flowchart of the steps of an injection molding method for an automotive connector provided in one embodiment of the present application;

[0039] Figure 2 It is a schematic diagram of the process of obtaining the injection pressure maintenance coefficient;

[0040] Figure 3 This is a schematic diagram of the structure of the injection molding related equipment for automotive connectors. DETAILED DESCRIPTION

[0041] In order to further explain the technical means and effects adopted by the present application to achieve the predetermined invention purpose, the following is a detailed description of the injection molding method, related equipment and storage medium of the automotive connector proposed in the present application, its specific implementation method, structure, characteristics and effects in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0042] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0043] The specific scheme of the injection molding method of the automotive connector, related equipment and storage medium provided by the present application is described in detail below with reference to the accompanying drawings.

[0044] See also Figure 1 , which shows a flow chart of the steps of an injection molding method of an automotive connector provided by an embodiment of the present application, the method comprising the following steps:

[0045] Step S1, collecting melt temperature data at each moment during the injection filling process of the automobile connector and cavity pressure data at each collection position of the mold.

[0046] The injection molding equipment of the automotive connector is mainly used to manufacture the plastic parts of the connector, including the connector pins and the external insulating shell. The injection molding equipment injects the molten plastic into the mold through high pressure, and forms the required connector shape after cooling. At present, when the automotive connector is injection molded, it is mainly divided into the plastic melting stage, the injection filling stage, the pressure holding stage, the cooling stage and the demolding post-processing stage. The injection filling stage is an important part of the injection molding process. Therefore, this embodiment performs adaptive graded adjustment on the relevant parameters of the injection filling stage to ensure the corresponding connector injection molding quality.

[0047] In order to more accurately adjust the relevant parameters of the injection filling stage, temperature sensors and pressure sensors are integrated inside the mold to monitor the melt temperature data and the intra-cavity pressure data at each sampling position in real time. At the same time, the design parameters of the corresponding material of the connector and the mold are obtained, including the viscosity of the material used for the connector, the number of cavities of the mold, the mold volume and the wall thickness at each sampling position of the connector, so as to determine the corresponding adjustment parameters for connectors of different designs to reduce the occurrence of defects.

[0048] Preferably, for the collection of melt temperature and cavity pressure data, the data collection interval is set to 0.2 seconds in the embodiment of the present application. As other embodiments of the present application, the implementer can set the data collection interval according to the actual situation.

[0049] In order to eliminate the dimension effect, each type of collected data was normalized using the Z-score algorithm.

[0050] Step S2, determining the design prerequisite coefficient of the connector based on the material of the connector and the design parameters of the mold; the design parameters include the viscosity of the material used for the connector, the number of cavities of the mold, and the wall thickness at each sampling position of the connector.

[0051] During the injection filling process of the connector, since different types of connectors have different morphological designs, and the injection molding machine uses the same set of injection molding parameters to inject different connectors, compatibility issues may arise. Therefore, the corresponding design prerequisite coefficients are calculated based on the design parameters of the connector, so that the injection parameters at different stages of the injection filling process can be adjusted to varying degrees.

[0052] For connectors, the material viscosity determines its flow performance in the mold. The higher the viscosity, the lower the flowability, and the flowability determines the corresponding injection parameters. At the same time, the molds of automotive connectors are usually finely designed and complex in structure. The narrow flow channels and complex flow paths increase the melt flow resistance, and the injection parameters need to be adjusted. Then the wall thickness of automotive connectors is usually thin. If the wall thickness is uneven, the injection parameters may need to be adjusted to cope with the difference in flow resistance in different areas.

[0053] Based on the above analysis, the difference between the wall thickness at any two sampling positions of the connector is calculated and recorded as the first difference;

[0054] The combined value of all the first differences of the connector, the viscosity of the material used in the connector and the number of cavities of the mold is used as the design prerequisite coefficient of the connector.

[0055] It should be noted that the fusion described in this application is to combine multiple variables. The specific fusion method can be determined according to actual conditions during the application process, and this application does not impose any special restrictions.

[0056] Preferably, in one embodiment of the present application, the first difference may be the absolute value of the difference between the wall thicknesses at any two sampling positions of the connector; the design prerequisite coefficient of the connector may be the product of the sum of all the first differences of the connector, the viscosity of the material used for the connector, and the number of cavities of the mold.

[0057] As other embodiments of the present application, the first difference may be the square of the difference between the wall thicknesses at any two sampling positions of the connector; the design prerequisite coefficient of the connector may be the sum of the normalized values ​​of the mean of all the first differences of the connector, the viscosity of the material used for the connector, and the number of cavities of the mold.

[0058] The sum of the first difference represents the uniformity of the connector wall thickness. The wall thickness differences corresponding to different sampling points are compared. The larger the value, the greater the wall thickness difference at different sampling positions, indicating that the uniformity of the wall thickness is lower and the greater the adjustment of the injection parameters. The greater the viscosity of the material, the lower the fluidity of the melt in the mold during the injection molding process, so a greater degree of adjustment is required. The number of cavities in the mold represents the design complexity of the connector. The more complex the connector, the larger the number of cavities and the greater the degree of adjustment.

[0059] Step S3, in the initial filling stage, based on the difference in the mean intracavity pressures between two adjacent moments, the difference between the melt temperature at each moment and the initial melt temperature, combined with the design prerequisite coefficient, calculate the injection pressure adjustment factor at each moment; based on the injection pressure adjustment factor at each moment, obtain the injection pressure at each moment in the initial filling stage; in the mid-term pressure stabilization stage, based on the difference in intracavity pressures at different positions of the mold, the volume of the unfilled melt area in the mold, combined with the design prerequisite coefficient, obtain the injection pressure maintenance coefficient, combined with the injection pressure at the last moment of the initial filling stage, to construct a unique injection pressure in the mid-term pressure stabilization stage.

[0060] During the injection filling process of the connector, the injection pressure and injection speed need to be controlled to ensure that the melt is fully filled into the mold, and at the same time, the injection pressure and injection speed must be synchronized to ensure the quality of the injection molded product. The injection filling process includes the initial filling stage and the mid-term pressure stabilization stage.

[0061] (1) Based on the difference in the mean pressure of the cavity at two adjacent moments in the initial filling stage, the difference between the melt temperature at each moment and the initial melt temperature, and the design prerequisite coefficient, the injection pressure adjustment factor of the connector at each moment in the initial filling stage is calculated; based on the injection pressure adjustment factor at each moment, the injection pressure at each moment in the initial filling stage is obtained:

[0062] The initial filling stage is a high-speed filling stage of molten plastic. The molten plastic quickly flows into the mold cavity and occupies most of the mold volume. The purpose of this stage is to ensure that the melt quickly fills the cavity to prevent short shots or incomplete filling caused by initial cooling of the material, so a higher injection pressure is required.

[0063] As the melt is injected, the pressure in the cavity gradually increases, and the injection pressure needs to be increased synchronously so that the melt can continue to overcome resistance and complete filling. The temperature of the melt after entering the mold has a direct impact on the fluidity of the material. The higher the temperature, the better the material fluidity and the lower the required injection pressure. At the same time, the larger the design prerequisite coefficient, the greater the injection pressure.

[0064] First, based on the above analysis, the injection pressure adjustment factor at each moment in the initial filling stage is constructed. Preferably, in one embodiment of the present application, the expression of the injection pressure adjustment factor of the connector at each moment in the initial filling stage can be:

[0065] , where The connector is first filled in the initial stage The injection pressure adjustment factor at each sampling moment, Initial filling stage The average pressure in the cavity at all sampling positions at the sampling time, Initial filling stage The average pressure in the cavity at all sampling positions at the sampling time, is the initial temperature of the melt, Initial filling stage The melt temperature at the sampling moment, is a positive number preset by humans. It is the design prerequisite factor of the connector. is the normalization function. is the first ratio, is the temperature difference; The role of The value of is 0. Preferably, in one embodiment of the present application, The value of is set to 0.01. In other embodiments of the present application, The implementer can set the value according to the actual situation.

[0066] In other embodiments of the present application, the injection pressure adjustment factor of the connector at each moment in the initial filling stage may be expressed as: , where is an exponential function with a natural constant as its base.

[0067] As the filling progresses, the pressure in the cavity gradually increases while the melt temperature slowly decreases, resulting in a decrease in fluidity. A greater injection pressure is required to improve its fluidity, and the greater the injection pressure adjustment factor. At the same time, combined with the design prerequisite coefficient of this type of connector, since the design prerequisite coefficient represents the design characteristics of this type of connector, the larger the design prerequisite coefficient, the greater the injection parameter required to cope with it, so the corresponding injection pressure adjustment factor is larger.

[0068] Then, the injection pressure at each moment in the initial filling stage is obtained based on the injection pressure adjustment factor at each moment:

[0069] Since the melt needs to fill the mold in time during the initial filling stage, the injection pressure needs to be continuously increased, and the adjustment factor is only adaptive to the degree of increase according to the filling state. Therefore, the expression of the injection pressure at each moment in the initial filling stage is:

[0070] , where Initial filling stage The injection pressure at the sampling moment, Initial filling stage The injection pressure at the sampling moment, The connector is first filled in the initial stage The injection pressure adjustment factor at each sampling moment. The injection pressure at the initial moment is a preset value. Preferably, in one embodiment of the present application, the injection pressure at the initial moment is set to 800 bar. As other embodiments of the present application, the implementer can set the injection pressure at the initial moment according to the actual situation.

[0071] (2) Based on the intracavity pressure difference at different positions of the mold during the mid-term pressure stabilization stage and the volume of the unfilled melt area in the mold, the injection pressure maintenance coefficient of the mid-term pressure stabilization stage is obtained in combination with the design prerequisite coefficient of the connector. Combined with the injection pressure at the last moment of the initial filling stage, the unique injection pressure of the mid-term pressure stabilization stage is constructed:

[0072] After the mold cavity has been partially filled, the material continues to flow into the cavity, and the mid-term pressure stabilization stage is entered. The melt flow requires lower and more stable pressure control to ensure that the melt can flow smoothly, avoid turbulence or bubbles, and ensure the consistency of the finished product. Since this stage is a supplementary treatment for the initial filling stage, the injection pressure requirement is lower and more stable than that of the initial filling stage. Therefore, it is necessary to adjust the initial injection pressure next, and use the only injection pressure for injection molding in this stage.

[0073] At this stage, it is necessary to analyze the uniformity of melt distribution in the mold and the size of bubbles in the cavity. If the melt distribution is more uniform and the size of bubbles in the cavity is smaller when entering this stage, it means that the injection state is stable. A lower injection pressure is required at this stage. At the same time, a comprehensive analysis can be performed in combination with the design prerequisite coefficient.

[0074] First, based on the above analysis, the injection pressure maintenance coefficient of the mid-term pressure stabilization stage is constructed. Preferably, in one embodiment of the present application, the expression of the injection pressure maintenance coefficient of the mid-term pressure stabilization stage can be:

[0075] , where is the injection pressure maintenance coefficient in the mid-term pressure stabilization stage, is the cavity pressure of the mold at the i-th sampling position during the mid-term pressure stabilization stage, is the cavity pressure of the mold at the jth sampling position during the mid-term pressure stabilization stage, is the number of sampling positions for the pressure in the mold cavity, is the volume of melt injected into the mold at the end of the initial filling stage, C is the maximum volume of the mold, and U is the design prerequisite coefficient of the connector. is a normalized function. Among them, the cavity pressure of the mold at each sampling position during the mid-term pressure stabilization stage is specifically the cavity pressure collected at the first moment of the mid-term pressure stabilization stage. is the pressure difference, is the second ratio, is the first difference.

[0076] In other embodiments of the present application, the expression of the injection pressure maintenance coefficient in the mid-term pressure stabilization stage can be: .

[0077] The sum of all pressure differences represents the uniformity of melt distribution when entering this stage. The differences in cavity pressure at different sampling positions are compared. If the difference is smaller, the melt distribution at this stage is more uniform, and a smaller injection pressure is required. The first difference represents the bubble size at this stage, which is expressed by the injection volume and the volume difference. The smaller the value, the smaller the difference, which means the smaller the bubble size, and the smaller the injection pressure. Finally, combined with the design prerequisite coefficient, the larger the value, the greater the adjustment degree, and the greater the resistance to the reduction of injection pressure.

[0078] Then, the unique injection pressure in the mid-term pressure stabilization stage is constructed based on the injection pressure maintenance coefficient in the mid-term pressure stabilization stage, and the expression is:

[0079] , where It is the only injection pressure in the mid-term pressure stabilization stage. is the injection pressure at the last moment of the initial filling stage, It is the injection pressure maintenance coefficient in the mid-term pressure stabilization stage.

[0080] Through the above method, the injection pressure in the initial filling stage and the mid-term pressure stabilization stage of the injection filling process is adaptively adjusted in a graded manner to ensure the quality stability of injection molding filling of different types of connectors.

[0081] Step S4, based on the injection pressure difference between each moment and the previous moment, combined with the injection speed of each moment before the previous moment, construct the injection speed of each moment in the initial filling stage, and calculate the injection speed of the mid-term pressure stabilization stage in combination with the unique injection pressure.

[0082] In order to accurately maintain the consistency of overall quality during the injection molding process of the connector, simply adjusting the injection pressure cannot achieve this goal. It is also necessary to match the injection speed with the injection pressure to ensure that the melt fills the mold cavity at a corresponding flow rate to avoid flowing too fast or too slow. Flowing too fast may cause excessive shear stress, destroy the melt structure, and cause stratification or internal defects; flowing too slowly may not be able to fill all the details, resulting in defects in the finished product.

[0083] When the injection pressure increases, the resistance to melt flow in the mold increases, and the friction and shear force generated increase. At this time, a higher injection speed is required to overcome these resistances to ensure that the melt can quickly fill the mold cavity, and vice versa. Therefore, the two are positively correlated, and the injection speed increases with the increase of injection pressure and decreases with the decrease of injection pressure. Therefore, based on the difference in injection pressure at each moment in the initial filling stage and the previous moment, combined with the injection speed at the previous moment of each moment, the injection speed of the connector at each moment in the initial filling stage is constructed, and the expression is:

[0084] , where The connector is first filled in the initial stage The injection speed at each sampling moment, The connector is first filled in the initial stage The injection speed at each sampling moment, Initial filling stage The injection pressure at the sampling moment, Initial filling stage The injection pressure at each sampling moment. The injection speed at the initial moment is a preset value. Preferably, in one embodiment of the present application, the injection speed at the initial moment is set to 80 mm / s. As other embodiments of the present application, the implementer can set the injection speed at the initial moment according to the actual situation.

[0085] Similarly, the injection speed of the connector in the mid-term pressure stabilization stage is: calculate the ratio between the only injection pressure in the mid-term pressure stabilization stage and the injection pressure at the last sampling moment in the initial filling stage, recorded as the third ratio; the product of the third ratio and the injection speed at the last sampling moment in the initial filling stage is taken as the injection speed in the mid-term pressure stabilization stage.

[0086] Through the above method, the real-time injection speed is matched with the corresponding injection pressure adjustment degree, and the two are adjusted synchronously to ensure smooth mold filling.

[0087] Step S5, accurately injecting the automobile connector according to the injection speed at each moment in the injection filling process.

[0088] During the injection filling stage, the real-time injection speed is used to precisely control the automotive connector, which can ensure the quality and dimensional accuracy of the connector. At the same time, the precise control of parameters in the subsequent pressure holding and cooling stages can reduce common problems such as flash, shrinkage, and pores in different types of connectors, ensuring that the produced connectors meet the high standards of the automotive industry.

[0089] The schematic diagram of the injection pressure maintenance coefficient acquisition process is as follows Figure 2 shown.

[0090] See also Figure 3 , Figure 3 1 is a schematic diagram of the structure of the injection molding related equipment of the automobile connector provided in the embodiment of the present application. In this embodiment, each unit included in the terminal is used to execute each step in the embodiment corresponding to the injection molding method of the automobile connector. Figure 3 , injection molding related equipment includes:

[0091] Data acquisition module: collects melt temperature data at each moment during the injection filling process of the automotive connector and cavity pressure data at each acquisition position of the mold;

[0092] Prerequisite analysis module: determining the design prerequisite coefficient of the connector based on the material of the connector and the design parameters of the mold; the design parameters include the viscosity of the material used in the connector, the number of cavities of the mold, and the wall thickness at each sampling position of the connector;

[0093] Injection pressure adjustment module: In the initial filling stage, the injection pressure adjustment factor at each moment is calculated based on the difference in the mean pressure in the cavity between two adjacent moments, the difference between the melt temperature at each moment and the initial temperature of the melt, combined with the design prerequisite coefficient; the injection pressure at each moment in the initial filling stage is obtained based on the injection pressure adjustment factor at each moment; in the mid-term pressure stabilization stage, the injection pressure maintenance coefficient is obtained based on the difference in the cavity pressure at different positions of the mold, the volume of the unfilled melt area in the mold, combined with the design prerequisite coefficient, and the injection pressure at the last moment of the initial filling stage is combined to construct the only injection pressure in the mid-term pressure stabilization stage;

[0094] Injection speed calculation module: based on the injection pressure difference between each moment and the previous moment, combined with the injection speed of the previous moment, the injection speed of each moment in the initial filling stage is constructed, and combined with the unique injection pressure, the injection speed of the mid-term pressure stabilization stage is calculated;

[0095] Automotive connector injection molding module: Accurately inject automotive connectors according to the injection speed at each moment during the injection filling process.

[0096] Based on the same inventive concept as the above method, an embodiment of the present application also provides an injection molding storage medium for an automotive connector, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein when the processor executes the computer program, the steps of any one of the above-mentioned injection molding methods for the automotive connector are implemented.

[0097] In summary, the embodiment of the present application provides an injection molding method for an automotive connector, calculates corresponding design prerequisites based on the design parameters of the connector and its mold, determines the injection pressures at different filling stages based on the changing characteristics of the monitoring data at different stages in the injection filling process and the design prerequisites, and improves the accuracy of melt filling during the injection filling process by setting the injection pressures at different injection filling stages in a graded manner; matches the corresponding injection speeds based on different injection pressures, thereby adaptively adjusting the injection parameters of the filling process, thereby avoiding the problem of possible defects in the injection molding results due to differences in the design forms of different connectors when injection molding is performed using fixed preset injection molding parameters; reduces the occurrence of defects in finished products, and ensures the consistency and production efficiency of the finished products.

[0098] It should be noted that the above-mentioned sequence of the embodiments of the present application is only for description and does not represent the advantages and disadvantages of the embodiments. The above-mentioned specific embodiments of the present application are described. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0099] The various embodiments in the present application are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0100] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present application should be included in the protection scope of the present application.

Claims

1. An injection molding method for an automobile connector, characterized in that: The method comprises the following steps: Collect melt temperature data at each moment during the injection filling process of automobile connectors and cavity pressure data at each collection position of the mold; Determining the design prerequisite coefficient of the connector based on the material of the connector and the design parameters of the mold; the design parameters include the viscosity of the material used for the connector, the number of cavities of the mold, and the wall thickness at each sampling position of the connector; In the initial filling stage, the injection pressure adjustment factor at each moment is calculated based on the difference in the mean pressure in the cavity between two adjacent moments, the difference between the melt temperature at each moment and the initial temperature of the melt, combined with the design prerequisite coefficient; the injection pressure at each moment in the initial filling stage is obtained based on the injection pressure adjustment factor at each moment; in the mid-term pressure stabilization stage, the injection pressure maintenance coefficient is obtained based on the difference in the cavity pressure at different positions of the mold, the volume of the unfilled melt area in the mold, combined with the design prerequisite coefficient, and the injection pressure at the last moment of the initial filling stage is combined to construct the only injection pressure in the mid-term pressure stabilization stage; Based on the injection pressure difference between each moment and the previous moment, combined with the injection speed at the previous moment, the injection speed at each moment in the initial filling stage is constructed, and combined with the unique injection pressure, the injection speed in the mid-term pressure stabilization stage is calculated; Accurately inject the automotive connector according to the injection speed at each moment during the injection filling process; The expression of the injection pressure at each moment in the initial filling stage is: , where Initial filling stage The injection pressure at the sampling moment, Initial filling stage The injection pressure at the sampling moment, The connector is first filled in the initial stage The injection pressure adjustment factor at each sampling moment; The unique injection pressure expression of the mid-term pressure stabilization stage is: , where It is the only injection pressure in the mid-term pressure stabilization stage. is the injection pressure at the last moment of the initial filling stage, is the injection pressure maintenance coefficient; The expression of the injection speed at each moment in the initial filling stage is: , where , are the kth and kth in the initial filling stage respectively. The injection speed at each sampling moment, , are the kth and kth in the initial filling stage respectively. The injection pressure at the sampling moment.

2. The method for injection molding of an automobile connector according to claim 1, characterized in that: The process of obtaining the design prerequisite coefficients of the connector is as follows: Calculate the difference between the wall thickness at any two sampling positions of the connector, and record it as the first difference; The combined value of all the first differences, the viscosity and the number of cavities of the connector is used as a design prerequisite coefficient of the connector.

3. The injection molding method of the automotive connector according to claim 1, characterized in that: The process of obtaining the injection pressure adjustment factor at each moment is as follows: Calculate the ratio between the average intracavitary pressure at each moment and the corresponding previous moment, and record it as the first ratio; Calculate the difference between the initial temperature of the melt and the temperature of the melt at each moment, and record it as the temperature difference; The fusion value of the first ratio, the temperature difference and the design prerequisite coefficient is used as the injection pressure adjustment factor at each moment in the initial filling stage.

4. The injection molding method of the automobile connector according to claim 1, characterized in that: The process of obtaining the injection pressure maintenance coefficient is as follows: The difference between the cavity pressures at any two sampling positions of the mold is calculated, which is recorded as the pressure difference; the ratio between the volume of the melt injected into the mold at the end of the initial filling stage and the maximum volume of the mold is calculated, which is recorded as the second ratio, and the difference between the natural number 1 and the second ratio is recorded as the first difference; The fusion value of all the pressure differences between all sampling positions of the mold, the first difference and the design prerequisite coefficient of the connector is used as the injection pressure maintenance coefficient in the mid-term pressure stabilization stage.

5. The injection molding method of the automobile connector according to claim 1, characterized in that: The process of obtaining the injection speed in the mid-term pressure stabilization stage is as follows: The ratio between the unique injection pressure and the injection pressure at the last sampling moment of the initial filling stage is calculated and recorded as the third ratio; the product of the third ratio and the injection speed at the last sampling moment of the initial filling stage is used as the injection speed in the mid-term pressure stabilization stage.

6. An injection molding related device for automobile connectors, implementing the method as claimed in claim 1, characterized in that: The related equipment includes: Data acquisition module: collects melt temperature data at each moment during the injection filling process of the automotive connector and cavity pressure data at each acquisition position of the mold; Prerequisite analysis module: determining the design prerequisite coefficient of the connector based on the material of the connector and the design parameters of the mold; the design parameters include the viscosity of the material used in the connector, the number of cavities of the mold, and the wall thickness at each sampling position of the connector; Injection pressure adjustment module: In the initial filling stage, the injection pressure adjustment factor at each moment is calculated based on the difference in the mean pressure in the cavity between two adjacent moments, the difference between the melt temperature at each moment and the initial temperature of the melt, combined with the design prerequisite coefficient; the injection pressure at each moment in the initial filling stage is obtained based on the injection pressure adjustment factor at each moment; in the mid-term pressure stabilization stage, the injection pressure maintenance coefficient is obtained based on the difference in the cavity pressure at different positions of the mold, the volume of the unfilled melt area in the mold, combined with the design prerequisite coefficient, and the injection pressure at the last moment of the initial filling stage is combined to construct the only injection pressure in the mid-term pressure stabilization stage; Injection speed calculation module: based on the injection pressure difference between each moment and the previous moment, combined with the injection speed of the previous moment, the injection speed of each moment in the initial filling stage is constructed, and combined with the unique injection pressure, the injection speed of the mid-term pressure stabilization stage is calculated; Automotive connector injection molding module: Accurately inject automotive connectors according to the injection speed at each moment during the injection filling process.

7. An injection molding storage medium for an automotive connector, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 5 are implemented.

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