Injection molding material simulation analysis method, device, equipment, medium and program product

Abstract

The invention relates to an injection molding material simulation analysis method, device and equipment, a medium and a program product. The method comprises the following steps: carrying out grid division on an injection molding material model to obtain a first grid structure; dividing a coarse-grained grid in the first grid structure into a fine-grained grid to obtain a second grid structure corresponding to the first grid structure; carrying out injection molding analysis on the injection molding material represented by the injection molding material model based on the second grid structure, and determining the flowing direction component of each grid in the second grid structure; determining a target flow direction of each grid in the first grid structure according to the flow direction component; and carrying out material structure analysis based on the target flowing direction and the first grid structure to obtain a simulation analysis result of the injection molding material. By adopting the method, the anisotropy simulation analysis precision can be improved.

Description

Technical Field

[0001] This application relates to the field of simulation analysis technology, and in particular to a method, apparatus, equipment, medium, and program product for simulation analysis of injection molding materials. Background Technology

[0002] Injection molding is one of the core processes in the production of polymer materials. Due to its high efficiency, high precision, and large-scale production capabilities, it is widely used in the automotive, electronics, medical, and consumer goods industries. During injection molding, the polymer melt is injected into the mold cavity under high temperature and pressure. Its molecular chains and added fillers align along the flow direction, resulting in anisotropy.

[0003] This anisotropic characteristic directly affects the mechanical strength, durability, and other properties of products. In the process of analyzing the anisotropy of materials using simulation technology, homogenization is often employed, which simplifies anisotropic materials into isotropic models and uses empirical coefficients to globally correct the performance in the flow direction. The analysis results obtained through this simplification method deviate significantly from actual working conditions, resulting in low simulation accuracy. Summary of the Invention

[0004] Therefore, it is necessary to provide a method, apparatus, equipment, medium, and program product for simulation analysis of injection molding materials that can improve the accuracy of anisotropic simulation analysis, addressing the aforementioned technical problems.

[0005] Firstly, this application provides a simulation analysis method for injection molding materials, including:

[0006] The injection molding material model is meshed to obtain the first mesh structure;

[0007] The coarse-grained grid in the first grid structure is divided into fine-grained grids to obtain a second grid structure corresponding to the first grid structure;

[0008] Based on the second mesh structure, the injection molding analysis of the injection molding material represented by the injection molding material model is performed to determine the flow direction component of each mesh in the second mesh structure;

[0009] Based on the flow direction component, the target flow direction of each grid in the first grid structure is determined;

[0010] Based on the target flow direction and the first mesh structure, material structure analysis is performed to obtain the simulation analysis results of the injection molding material.

[0011] In one embodiment, the step of meshing the injection molding material model to obtain a first mesh structure includes:

[0012] Obtain the feature planes of the injection molding material model, and determine the regular and complex regions of the feature planes respectively;

[0013] The regular region is divided into a coarse-grained grid, and the complex region is divided into a fine-grained grid, resulting in a first grid structure that includes the coarse-grained grid and the fine-grained grid.

[0014] In one embodiment, dividing the coarse-grained grid in the first grid structure into a fine-grained grid to obtain a second grid structure corresponding to the first grid structure includes:

[0015] Connect the shortest diagonal of the coarse-grained grid, and divide the coarse-grained grid into fine-grained grids through the shortest diagonal;

[0016] By retaining the fine-grained mesh in the first mesh structure, a second mesh structure containing the fine-grained mesh is obtained.

[0017] In one embodiment, the step of performing injection molding analysis on the injection molding material represented by the injection molding material model based on the second mesh structure, and determining the flow direction components of each mesh in the second mesh structure, includes:

[0018] Obtain the casting information related to the injection molding material model;

[0019] The flow direction component is determined based on the pouring information and the position information of each grid in the second grid structure.

[0020] In one embodiment, determining the target flow direction of each grid in the first grid structure based on the flow direction component includes:

[0021] When the fine-grained grid to which the flow direction component belongs corresponds to the fine-grained grid in the first grid structure, the flow direction component is determined as the target flow direction;

[0022] When the fine-grained grid to which the flow direction component belongs belongs to the coarse-grained grid in the first grid structure, the direction assignment weight corresponding to the flow direction component is determined, the flow direction component is weighted according to the direction assignment weight, and the obtained partial weighted result is summed with the remaining weighted result of the coarse-grained grid to obtain the target flow direction.

[0023] In one embodiment, the material structure analysis based on the target flow direction and the first mesh structure to obtain the simulation analysis results of the injection molding material includes:

[0024] Map the target flow direction onto the first mesh structure;

[0025] Based on the target flow direction, a stress anisotropic elastic matrix is ​​constructed for each grid in the first grid structure to obtain the simulation analysis results of the injection molding material.

[0026] Secondly, this application also provides a simulation analysis device for injection molding materials, comprising:

[0027] The first mesh generation module is used to generate a mesh for the injection molding material model to obtain the first mesh structure.

[0028] The second mesh generation module is used to divide the coarse-grained mesh in the first mesh structure into fine-grained meshes to obtain a second mesh structure corresponding to the first mesh structure.

[0029] The injection molding analysis module is used to perform injection molding analysis on the injection molding material represented by the injection molding material model based on the second grid structure, and to determine the flow direction component of each grid in the second grid structure.

[0030] The flow direction determination module is used to determine the target flow direction of each grid in the first grid structure based on the flow direction component.

[0031] The material structure analysis module is used to perform material structure analysis based on the target flow direction and the first mesh structure to obtain the simulation analysis results of the injection molding material.

[0032] Thirdly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0033] The injection molding material model is meshed to obtain the first mesh structure;

[0034] The coarse-grained grid in the first grid structure is divided into fine-grained grids to obtain a second grid structure corresponding to the first grid structure;

[0035] Based on the second mesh structure, the injection molding analysis of the injection molding material represented by the injection molding material model is performed to determine the flow direction component of each mesh in the second mesh structure;

[0036] Based on the flow direction component, the target flow direction of each grid in the first grid structure is determined;

[0037] Based on the target flow direction and the first mesh structure, material structure analysis is performed to obtain the simulation analysis results of the injection molding material.

[0038] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the following steps:

[0039] The injection molding material model is meshed to obtain the first mesh structure;

[0040] The coarse-grained grid in the first grid structure is divided into fine-grained grids to obtain a second grid structure corresponding to the first grid structure;

[0041] Based on the second mesh structure, the injection molding analysis of the injection molding material represented by the injection molding material model is performed to determine the flow direction component of each mesh in the second mesh structure;

[0042] Based on the flow direction component, the target flow direction of each grid in the first grid structure is determined;

[0043] Based on the target flow direction and the first mesh structure, material structure analysis is performed to obtain the simulation analysis results of the injection molding material.

[0044] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, performs the following steps:

[0045] The injection molding material model is meshed to obtain the first mesh structure;

[0046] The coarse-grained grid in the first grid structure is divided into fine-grained grids to obtain a second grid structure corresponding to the first grid structure;

[0047] Based on the second mesh structure, the injection molding analysis of the injection molding material represented by the injection molding material model is performed to determine the flow direction component of each mesh in the second mesh structure;

[0048] Based on the flow direction component, the target flow direction of each grid in the first grid structure is determined;

[0049] Based on the target flow direction and the first mesh structure, material structure analysis is performed to obtain the simulation analysis results of the injection molding material.

[0050] The aforementioned methods, apparatus, equipment, media, and program products for simulating and analyzing injection molding materials involve meshing the injection molding material model to obtain a first mesh structure. This first mesh structure simulates the spatial shape of the injection-molded material. Mesh generation divides the model into smaller mesh units, facilitating anisotropic analysis at a smaller scale. The coarse-grained mesh in the first mesh structure is further subdivided into fine-grained meshes, resulting in a second mesh structure corresponding to the first. The fine-grained mesh is smaller than the coarse-grained mesh, and it exhibits higher accuracy in areas with irregular geometry in the injection molding material model. Based on this second mesh structure, the injection molding material model is characterized... Injection molding analysis is performed on the injection molding material to determine the flow direction components of each grid in the second mesh structure. Injection molding analysis can simulate the process of material from pouring into the mold to molding, giving the fine-grained grids in the second mesh structure accurate flow direction components. Based on the flow direction components, the target flow direction of each grid in the first mesh structure is determined. The second mesh structure and the first mesh structure have a corresponding relationship. Based on the flow direction of the fine-grained grids obtained by dividing the coarse-grained grids in the second mesh structure into the same coarse-grained grids as the first mesh structure, the target flow direction can be obtained. Based on the target flow direction and the first mesh structure, material structure analysis is performed to obtain the simulation analysis results of the injection molding material. Therefore, the embodiments of this application adopt a multi-mesh division method. In the initial mesh division, a larger mesh unit can be quickly obtained. Injection molding analysis is performed on the basis of the second division, and the analysis results are fed back to the initially divided mesh units. Thus, a more accurate flow direction analysis result is obtained through smaller mesh units, so that the simulation analysis results can more accurately consider the influence of anisotropy caused by injection molding and improve the accuracy of the simulation analysis. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 This is a flowchart illustrating the simulation analysis method for injection molding materials in one embodiment;

[0053] Figure 2 This is a flowchart illustrating the process of meshing an injection molding material model to obtain a first mesh structure in one embodiment.

[0054] Figure 3 This is a schematic diagram of the first mesh structure in one embodiment;

[0055] Figure 4 This is a schematic diagram of the second mesh structure in one embodiment;

[0056] Figure 5 This is a schematic diagram of the process of performing injection molding analysis on the injection molding material represented by the injection molding material model based on the second grid structure in one embodiment, and determining the flow direction components of each grid in the second grid structure.

[0057] Figure 6 This is a schematic diagram of the flow direction components of the grid in the second grid structure in one embodiment;

[0058] Figure 7 This is a schematic diagram of the target flow direction of the grid in the first grid structure of one embodiment;

[0059] Figure 8 This is a structural block diagram of an injection molding material simulation analysis device in one embodiment;

[0060] Figure 9 This is an internal structural diagram of a computer device in one embodiment;

[0061] Figure 10 This is a diagram of the internal structure of a computer device in another embodiment. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0063] It should be noted that the terms "first," "second," etc., used in this application can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "comprising" and "having," and any variations thereof, used in this application, are intended to cover non-exclusive inclusion. The term "multiple" used in this application refers to two or more. The term "and / or" used in this application refers to one of the embodiments, or any combination of multiple embodiments.

[0064] During injection molding, the polymer melt is injected into the mold cavity under high temperature and pressure. Its molecular chains and fiber fillers align along the flow direction, resulting in significant differences in the material's mechanical properties (such as elastic modulus, tensile strength, and coefficient of thermal expansion) between the flow direction and the perpendicular direction, creating anisotropy. For example, in fiber-reinforced composites, the high orientation of fibers along the flow direction significantly improves longitudinal mechanical properties, while transverse properties are greatly reduced due to the loosening of the molecular chains. This anisotropy directly affects the product's mechanical strength, durability, and functional performance. Therefore, accurate prediction of material property distribution is crucial during the product design phase to optimize structural design and avoid failure risks.

[0065] Simulation methods in related technologies still have some shortcomings when addressing anisotropic problems in injection molding. A common approach is to use homogenization, simplifying anisotropic materials into isotropic models and globally correcting the properties in the flow direction using empirical coefficients. For example, the elastic modulus in the flow direction is multiplied by an empirical coefficient to obtain the overall material property parameter. While this method simplifies the calculation process, it completely ignores the differences in properties after material orientation, leading to significant deviations between the analysis results and actual working conditions. This limitation is particularly pronounced in scenarios with complex geometries or high precision requirements. Furthermore, some studies on anisotropy rely on multi-scale modeling methods, mapping microscopic structural simulations to macroscopic structural properties. However, these methods not only require constructing complex microscopic models (such as single-cell models or fiber distribution models) but also necessitate data transfer between meshes of different scales, making them prone to distortion due to mesh mismatch or mapping errors. Simultaneously, the complex operational process of this method further limits its application in rapid iterative design.

[0066] In one exemplary embodiment, such as Figure 1 As shown, a simulation analysis method for injection molding materials is provided. This embodiment illustrates the application of this method to a terminal. It is understood that this method can also be applied to a server, and to a system including both a terminal and a server, and can be implemented through interaction between the terminal and the server. In this embodiment, the method includes steps 102 to 110.

[0067] Step 102: Mesh the injection molding material model to obtain the first mesh structure.

[0068] Injection molding is a process in which raw materials are heated to a molten state, injected into a mold, and then cooled and solidified to form a finished product. An injection molding material model is a virtual model of the injection-molded material with a specific shape, generated through software simulation. The shape of the injection molding material model can be designed according to the shape of the product produced by the actual process. Mesh generation refers to the operation of dividing the overall injection molding material model into small-sized mesh units. The first mesh structure is the mesh structure obtained from the initial division of the injection molding material model. Materials used in injection molding to produce products mainly include polymer materials and composite materials with polymer materials as the base material. The simulation analysis in this embodiment is applicable to materials such as fiber-filled PA12 (Polyamide 12), PP (Polypropylene), PC (Polycarbonate), PPS (Polyphenylene sulfide), and PSU (Polysulfone), etc., which are thermoplastic engineering plastics. The types of filler fibers can include carbon fiber, glass fiber, basalt fiber, etc.

[0069] For example, the injection molding material model is meshed according to the set meshing conditions to obtain the first mesh structure. The meshing conditions can set parameters such as the shape, area, and number of meshes, so that each mesh in the first mesh structure conforms to the corresponding settings, and the meshing process is carried out accordingly. For example, the meshing conditions can be set to use quadrilateral and triangular unit shapes for meshing, and the ratio of quadrilateral to triangular mesh units can be ≥95%.

[0070] Step 104: Divide the coarse-grained grid in the first grid structure into a fine-grained grid to obtain a second grid structure corresponding to the first grid structure.

[0071] Coarse-grained meshes refer to meshes with relatively coarse meshing. Fine-grained meshes refer to meshes with relatively fine meshing. Fine-grained meshes have a finer meshing precision than coarse-grained meshes. The second mesh structure can be considered as the result of further meshing the first mesh structure; therefore, the two are corresponding. It can be understood that the shape and structure of the first mesh structure are consistent with the second mesh structure. After meshing, the coarse-grained meshes in the first mesh structure can correspond to multiple fine-grained meshes in the second mesh structure.

[0072] For example, the shape type of the fine-grained mesh is determined, and the coarse-grained mesh in the first mesh structure is divided into fine-grained meshes according to the shape type of the fine-grained mesh, resulting in a second mesh structure corresponding to the first mesh structure. The coarse-grained mesh and the fine-grained mesh have different shape types. Multiple fine-grained meshes are divided into the coarse-grained mesh, and each fine-grained mesh can be used for more refined injection molding analysis.

[0073] Step 106: Perform injection molding analysis on the injection molding material represented by the injection molding material model based on the second grid structure, and determine the flow direction component of each grid in the second grid structure.

[0074] The injection molding material represented by the injection molding material model can be considered as the solid injection molded product corresponding to the injection molding material model. Injection molding analysis refers to the operation of analyzing material changes in different aspects using the process parameters involved in injection molding. For example, through injection molding analysis, defects such as material warpage and shrinkage marks can be predicted, helping to reduce manufacturing errors. The flow direction component refers to the material flow direction of each grid in the second grid structure during the injection molding process. The fine-grained grid in the second grid structure is at least partially derived from the division of the first grid structure, and subsequent analysis is based on the first grid structure. Therefore, this flow direction component can be used as the basis for determining the flow direction of each grid in the first grid structure.

[0075] For example, based on the second mesh structure and the obtained injection molding process parameters, injection molding analysis is performed on the injection molding material represented by the injection molding material model to determine the flow direction components of each mesh in the second mesh structure. Injection molding process parameters may include factors that affect the flow direction and rate of the high-temperature melt in the mold, such as mold temperature, number of mold gates, mold gate location, and cooling location. The degree of influence of injection molding process parameters varies for different meshes in the second mesh structure; accurate flow direction components can be obtained through injection molding analysis.

[0076] Step 108: Determine the target flow direction of each grid in the first grid structure based on the flow direction component.

[0077] The target flow direction refers to the material flow direction of the mesh in the first mesh structure during the injection molding process. It is understandable that the types of mesh elements in the first mesh structure will differ depending on the meshing method, and each flow direction component can represent the directional properties of a mesh. Even with different meshing methods, the target flow direction can be determined using multiple flow direction components based on the relationship between the meshes in the first and second mesh structures.

[0078] For example, the corresponding grid for each flow direction component in the first grid structure is determined, obtaining the flow direction component set for each grid in the first grid structure. For each grid in the first grid structure, the target flow direction is determined based on the flow direction component set. Each flow direction component set includes at least one flow direction component. Vector calculations can be performed on the flow direction components in the flow direction component set to obtain the target flow direction.

[0079] Step 110: Perform material structure analysis based on the target flow direction and the first mesh structure to obtain the simulation analysis results of the injection molding material.

[0080] Material structure analysis refers to the analysis of the physical properties of injection molded materials affected by their orientation structure. Simulation analysis results for injection molded materials include the anisotropy of the material and can be characterized using various methods. The target flow direction can be used as an orientation reference for each grid cell in the first grid structure. By simulating the properties of the injection molded material in different directions under stress, simulation analysis results are obtained.

[0081] For example, an anisotropic material model is established based on the target flow direction and the first mesh structure. Material structure analysis is then performed based on this anisotropic material model to obtain simulation results for the injection molding material. Compared to the injection molding material model, the anisotropic material model includes the orientation information of the injection molding material. During the material structure analysis, the structural changes of the injection molding material under different stress conditions can be simulated, providing a reference for optimizing the injection molding process.

[0082] In the above-mentioned simulation analysis method for injection molding materials, the injection molding material model is meshed to obtain a first mesh structure. The injection molding material model can simulate the spatial shape of the injection-molded material. Mesh generation divides the injection molding material model into small-sized mesh units, facilitating anisotropic analysis at a smaller scale. The coarse-grained mesh in the first mesh structure is further divided into fine-grained meshes to obtain a second mesh structure corresponding to the first mesh structure. The fine-grained mesh is smaller in size than the coarse-grained mesh. In locations with irregular geometric shapes in the injection molding material model, the fine-grained mesh has higher accuracy. Based on the second mesh structure, the injection molding material represented by the injection molding material model is analyzed. Injection molding analysis determines the flow direction components of each grid in the second mesh structure. Injection molding analysis simulates the process of material from pouring into the mold to molding, assigning accurate flow direction components to the fine-grained grids in the second mesh structure. Based on these flow direction components, the target flow direction of each grid in the first mesh structure is determined. The second mesh structure and the first mesh structure have a corresponding relationship. The target flow direction can be obtained by dividing the fine-grained grids from the coarse-grained grids that belong to the first mesh structure within the second mesh structure. Material structure analysis is then performed based on the target flow direction and the first mesh structure to obtain the simulation analysis results of the injection molded material. Therefore, this embodiment employs a multi-mesh generation method. In the initial mesh generation, larger-sized mesh elements can be quickly obtained. Injection molding analysis is then performed based on the subsequent generation, and the analysis results are fed back to the initially generated mesh elements. This results in a more accurate flow direction analysis using smaller-sized mesh elements, allowing the simulation analysis results to more accurately consider the effects of anisotropy caused by injection molding, thus improving the accuracy of the simulation analysis.

[0083] In one exemplary embodiment, such as Figure 2 As shown, the injection molding material model is meshed to obtain the first mesh structure, including the following steps 202 to 204.

[0084] Step 202: Obtain the feature planes of the injection molding material model, and determine the regular and complex regions of the feature planes respectively.

[0085] A characteristic plane is a plane that is representative of the shape of an injection molding material model, and its anisotropy analysis results are valuable for the simulation analysis of the injection molding material model. A regular region refers to a region within the characteristic plane that has a relatively flat or regular shape. A complex region refers to a region within the characteristic plane that has a relatively complex shape, such as areas containing rounded corners or holes.

[0086] For example, the structural type of the injection molding material model is identified, and the feature planes of the injection molding material model are obtained based on the structural type. The structural type of the injection molding material model is consistent with the injection molding material it represents. Products made from injection molding materials can be used as structural components in various devices to achieve different functional uses. For example, structural types may include thin-walled parts, connectors, and fasteners. These structural types of injection molding material models are similar in shape, and their feature planes can be selected according to the characteristics of different structural types.

[0087] For example, the boundaries between regular and complex regions can be set as straight lines, allowing the boundary positions to coincide with the boundaries of subsequently divided meshes. During the creation of the injection molding material model, locations with special shapes can be marked. When determining regular and complex regions, the shape markings of the injection molding material model can be used as a reference to define the boundaries between these regions.

[0088] Step 204: Divide the regular region into a coarse-grained grid and the complex region into a fine-grained grid to obtain a first grid structure containing both coarse-grained and fine-grained grids.

[0089] Taking a coarse-grained mesh as a quadrilateral shell element mesh and a fine-grained mesh as a triangular shell element mesh as an example... Figure 3 This is a schematic diagram of the first mesh structure in one embodiment, such as... Figure 3 As shown, regular regions occupy most of the feature plane. Regular regions are divided using quadrilateral shell elements, while complex regions are divided using triangular shell elements. Quadrilateral shell elements can be irregular quadrilaterals, parallelograms, trapezoids, rectangles, or squares. Squares have the most regular shape, so they should be preferred for dividing regular regions. Coarse-grained meshes are faster than fine-grained meshes, while fine-grained meshes are more accurate than coarse-grained meshes.

[0090] For example, at the boundary between regular and complex regions, if there are gaps between quadrilateral shell elements and triangular shell elements in the first mesh structure after division, the mesh division boundaries adjacent to the gap positions can be adjusted so that the quadrilateral shell elements and triangular shell elements share the same edge, or other methods can be used to adjust and eliminate the gaps.

[0091] In this embodiment, by combining coarse-grained and fine-grained mesh generation, both high generation speed and high generation accuracy can be considered.

[0092] In an exemplary embodiment, the coarse-grained grid in the first grid structure is divided into fine-grained grids to obtain a second grid structure corresponding to the first grid structure. This includes: connecting the shortest diagonal of the coarse-grained grids, dividing the coarse-grained grids into fine-grained grids through the shortest diagonal; and retaining the fine-grained grids in the first grid structure to obtain a second grid structure containing fine-grained grids.

[0093] Reference Figure 4 , Figure 4 This is a schematic diagram of a second mesh structure in one embodiment. (Combined with...) Figure 3 and Figure 4 Continuing with the example of using coarse-grained meshes as quadrilateral shell element meshes and fine-grained meshes as triangular shell element meshes, the triangular shell element meshes after the initial meshing are retained, while the quadrilateral shell elements are divided into two triangular shell elements by the diagonals. Normally, a quadrilateral has two diagonals; this embodiment selects the shortest diagonal as the dividing line. The two triangular shell elements formed under this method are closer to equilateral triangles and have a smaller distortion rate. The second mesh structure still has the same overall shape as the first mesh structure, and the positions of each mesh in the first mesh structure can correspond to one or more meshes in the second mesh structure.

[0094] In this embodiment, the adaptability to complex geometries can be enhanced by further subdividing the coarse-grained grid.

[0095] In one exemplary embodiment, such as Figure 5 As shown, the injection molding analysis of the injection molding material represented by the injection molding material model is performed based on the second grid structure to determine the flow direction components of each grid in the second grid structure, including the following steps 502 to 504.

[0096] Step 502: Obtain the casting information related to the injection molding material model.

[0097] Gating information refers to information related to the gating stage of the injection molding process. In the gating stage, high-temperature molten metal is injected into the mold after it has closed. After pouring, it is held under pressure for a certain period before cooling and solidifying. The injection port of the mold is called the gate. The flow path of the high-temperature molten metal in the mold starts from the gate location, and the ending point is determined by the amount poured. The mold may contain multiple gates, and pouring can occur simultaneously. The flow paths of the high-temperature molten metal entering the mold from different gates may influence each other. Therefore, the types of gating information that can be obtained include the number of gates and their locations.

[0098] Step 504: Determine the flow direction component based on the casting information and the position information of each grid in the second grid structure.

[0099] A coordinate system can be established on the two-dimensional plane containing the feature plane. The second mesh structure can be represented by a set of coordinate points, and the mesh representation can be considered as a subset of the coordinate point set of the second mesh structure. From the perspective of the coordinate system, the mesh includes multiple coordinate points, and the position information of the mesh can be characterized by the coordinates of the points in the mesh. For example, the coordinate position of the center point of the mesh can be selected as its position information. The gate position contained in the gating information can also be converted into a coordinate representation in the coordinate system, and the flow direction components of each mesh can be obtained using the injection molding analysis function of fluid simulation software.

[0100] Figure 6 This is a schematic diagram of the flow direction components of the grid in the second grid structure of one embodiment. Figure 6 The arrows in the diagram indicate the flow direction represented by the flow direction component. Figure 6 The two triangular shell elements in the first mesh structure can be regarded as the result of dividing the quadrilateral shell elements. It can be seen that the flow direction components of the two triangular shell elements are not completely parallel, but have certain differences. If the quadrilateral shell elements before division are directly subjected to injection molding analysis, this difference may be ignored and lead to errors.

[0101] In this embodiment, the flow direction components of each grid in the second grid structure are obtained through injection molding analysis, which allows for more detailed orientation analysis of the injection molding material at different positions and obtains more accurate information related to the flow direction.

[0102] In an exemplary embodiment, determining the target flow direction of each grid in the first grid structure based on the flow direction component includes: determining the flow direction component as the target flow direction when the fine-grained grid to which the flow direction component belongs corresponds to a fine-grained grid in the first grid structure; determining the direction allocation weight corresponding to the flow direction component when the fine-grained grid to which the flow direction component belongs belongs to a coarse-grained grid in the first grid structure; weighting the flow direction component according to the direction allocation weight; and summing the obtained partial weighted result with the remaining weighted result of the coarse-grained grid to obtain the target flow direction.

[0103] The first mesh structure may include a portion of fine-grained meshes. When the mesh is subdivided again, this portion of fine-grained meshes is retained. Therefore, the fine-grained meshes in the first mesh structure correspond to the fine-grained meshes in the second mesh structure. After injection molding analysis, the flow direction component can be directly used as the target flow direction.

[0104] Continuing with the example above where fine-grained meshes are triangular shell elements and coarse-grained meshes are quadrilateral shell elements, the quadrilateral shell elements in the first mesh structure can be divided into two triangular shell elements. Therefore, the quadrilateral shell elements in the first mesh structure correspond to the two triangular shell elements in the second mesh structure. The triangular shell element to which the flow direction component belongs belongs to the quadrilateral shell element in the first mesh structure. The two triangular shell elements in the second mesh structure can each be assigned different weights, and the target flow direction can be obtained by weighted summation.

[0105] Reference Figure 7 , Figure 7 This is a schematic diagram of the target flow direction of a grid in a first grid structure in one embodiment, where the arrow direction indicates the target flow direction. Figure 7 The target flow direction can be regarded as Figure 6 It is obtained by weighted summation of the flow direction components of the two triangular shell elements.

[0106] For example, the direction assignment weights of the flow direction components can be allocated based on the grid area or the flow path length. Taking allocation based on grid area as an example, the target flow direction can be determined with reference to the following formula 1.

[0107] Formula 1: .

[0108] in, Indicates the target flow direction, and S1 represents the area of ​​the first triangular shell element. S1 represents the flow direction component of the first triangular shell element, and S2 represents the area of ​​the second triangular shell element. This represents the flow direction component of the second triangular shell element.

[0109] In this embodiment, the flow direction component of the fine-grained grid is assigned a direction allocation weight to determine the target flow direction. This can accurately reproduce the influence of injection flow on material orientation, avoid the spatial average error caused by homogenization methods, and also support the direction mapping of non-uniform flow paths (such as multi-gate systems), adapting to complex injection molding process scenarios.

[0110] In an exemplary embodiment, material structure analysis is performed based on the target flow direction and the first mesh structure to obtain the simulation analysis results of the injection molding material, including: mapping the target flow direction to the first mesh structure; and constructing a stress anisotropic elastic matrix for each mesh in the first mesh structure based on the target flow direction to obtain the simulation analysis results of the injection molding material.

[0111] Based on the correspondence between the grids in the first and second grid structures, the target flow direction can be mapped to the first grid structure, and this target flow direction can be used as the principal axis direction of the material in the quadrilateral shell element of the first grid structure. The stress anisotropic elastic matrix can be represented in planar form, and the anisotropic properties are studied using orthogonal directions, including the material flow direction and the direction perpendicular to the flow direction. The established matrix can be referenced in Equation 2 below. The simulation analysis accuracy of this embodiment can be evaluated by combining the tensile / bending test results.

[0112] Formula 2: .

[0113] Wherein, subscripts 1 and 2 represent the two selected principal directions, namely the flow direction and the vertical direction in this embodiment; E1 and E2 are the elastic moduli of the flow direction and the direction perpendicular to the flow direction, respectively; and G... 12 v is the shear modulus. 12 v is the Poisson's ratio that causes contraction in two directions when stretched in one direction. 21 Poisson's ratio is the ratio that causes contraction in one direction when stretched in two directions.

[0114] In this embodiment, the correspondence obtained through mesh generation can realize a one-to-one lossless mapping between the mesh used for injection molding analysis and the mesh used for structural analysis, which can avoid interpolation errors in multi-mesh mapping of related technologies and improve the accuracy of anisotropy analysis.

[0115] In an exemplary embodiment, the injection molding material simulation analysis method includes the following steps S1 to S6.

[0116] S1. Perform quadrilateral shell element mesh generation. The resulting first mesh structure A can be used for subsequent structural analysis. The generation of the first structure mesh can employ a hybrid mesh generation strategy, primarily using quadrilateral shell elements (≥95%) and secondarily using triangular shell elements. Quadrilateral elements are preferentially used for flat or regular curved surfaces, while triangular elements are used for local complex geometries (such as rounded corners and holes) to ensure computational stability and accuracy.

[0117] S2. Split the quadrilateral shell elements in the first mesh structure A into two triangular shell elements. The resulting second mesh structure B is composed entirely of triangular shell elements and can be used for injection molding analysis. The splitting rule can be to select the shortest diagonal of each quadrilateral element for cutting, thereby controlling the distortion rate of the triangular elements and generating the resulting entirely triangular mesh B, specifically for injection molding flow analysis.

[0118] S3. Perform injection molding analysis on the full triangular shell element mesh B to obtain the surface flow direction component V1 of the full triangular mesh. The injection molding process simulation based on mesh B can be performed using fluid simulation software to obtain the vector representation V1 of the surface flow direction for each triangular element.

[0119] S4. The flow direction components V1 of the triangular shell element are weighted and summed to obtain the target flow direction V2. Among them, for two triangular elements split from the same quadrilateral element, their V1 vectors can be weighted and summed according to the element area or the flow path length to generate the vector representation V2 of the target flow direction of the quadrilateral element.

[0120] S5. Map the target flow direction onto the first mesh structure A. This mapping can be done using mesh processing software. After mapping, use the V2 vector as the principal axis direction of the material in the quadrilateral element.

[0121] S6. Using an orthogonal anisotropic material model, structural analysis is performed using the mapped first mesh structure A to obtain anisotropic analysis results considering the molding process.

[0122] In an exemplary embodiment, a case study of cantilever beam deformation is conducted using the injection molding material simulation analysis method described in the above embodiments. A 30% short glass fiber reinforced PA12 cantilever beam model with dimensions of 100mm in length, 30mm in width, and 3mm in thickness is used. The structural mesh is divided as follows: 95% quadrilateral elements (1mm in size) and 5% triangular elements for rounded corners. Injection parameters are: melt temperature 280℃, injection speed 50mm / s, and the gate located at the fixed end of the beam. The load at the free end is 10N perpendicular to the plane. The analysis process is as follows: the quadrilateral mesh is divided into triangular meshes according to the shortest diagonal rule for injection molding analysis. After obtaining the flow direction vector V1, the V2 vector of the quadrilateral mesh is obtained through weighted summation. The orthotropic material model is as follows: E1 = 9.6GPa (flow direction), E2 (perpendicular direction) = 5.0GPa, Poisson's ratio is 0.38. Load deformation calculation is performed, and the maximum deformation is 6.02mm. The actual test result was 5.81 mm, and the simulation analysis accuracy was 96.3%.

[0123] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0124] Based on the same inventive concept, this application also provides an injection molding material simulation analysis device for implementing the above-mentioned injection molding material simulation analysis method. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations of one or more injection molding material simulation analysis device embodiments provided below can be found in the limitations of the injection molding material simulation analysis method described above, and will not be repeated here.

[0125] In one exemplary embodiment, such as Figure 8 As shown, an injection molding material simulation analysis device 800 is provided, including: a first mesh generation module 801, a second mesh generation module 802, an injection molding analysis module 803, a flow direction determination module 804, and a material structure analysis module 805.

[0126] The first mesh generation module 801 is used to perform mesh generation on the injection molding material model to obtain the first mesh structure.

[0127] The second mesh generation module 802 is used to divide the coarse-grained mesh in the first mesh structure into fine-grained meshes to obtain a second mesh structure corresponding to the first mesh structure.

[0128] Injection molding analysis module 803 is used to perform injection molding analysis on the injection molding material represented by the injection molding material model based on the second grid structure, and to determine the flow direction components of each grid in the second grid structure.

[0129] The flow direction determination module 804 is used to determine the target flow direction of each grid in the first grid structure based on the flow direction component.

[0130] The material structure analysis module 805 is used to perform material structure analysis based on the target flow direction and the first mesh structure to obtain the simulation analysis results of the injection molding material.

[0131] In an exemplary embodiment, the first mesh division module 801 is further configured to: obtain the feature plane of the injection molding material model, determine the regular region and complex region of the feature plane respectively; divide the regular region into a coarse-grained mesh and the complex region into a fine-grained mesh, thereby obtaining a first mesh structure containing the coarse-grained mesh and the fine-grained mesh.

[0132] In an exemplary embodiment, the second mesh division module 802 is further configured to: connect the shortest diagonal of the coarse-grained mesh, divide the coarse-grained mesh into fine-grained meshes through the shortest diagonal; retain the fine-grained meshes in the first mesh structure to obtain a second mesh structure containing fine-grained meshes.

[0133] In an exemplary embodiment, the injection molding analysis module 803 is further configured to: acquire casting information related to the injection molding material model; and determine the flow direction component based on the casting information and the position information of each grid in the second grid structure.

[0134] In an exemplary embodiment, the flow direction determination module 804 is further configured to: determine the flow direction component as the target flow direction when the fine-grained grid to which the flow direction component belongs corresponds to the fine-grained grid in the first grid structure; and determine the direction allocation weight corresponding to the flow direction component when the fine-grained grid to which the flow direction component belongs belongs to the coarse-grained grid in the first grid structure, weight the flow direction component according to the direction allocation weight, and sum the obtained partial weighted result with the remaining weighted result of the coarse-grained grid to obtain the target flow direction.

[0135] In an exemplary embodiment, the material structure analysis module 805 is further configured to: map the target flow direction to the first mesh structure; and based on the target flow direction, construct a stress anisotropic elastic matrix for each mesh in the first mesh structure to obtain the simulation analysis results of the injection molding material.

[0136] Each module in the aforementioned injection molding material simulation and analysis device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0137] In one exemplary embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 9As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, Near Field Communication (NFC), or other technologies. When the computer program is executed by the processor, it implements a simulation analysis method for injection molding materials. The display unit is used to form a visually visible image and can be a display screen, projection device, or virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0138] In one exemplary embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 10 As shown, this computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operating system and computer programs stored in the non-volatile storage media. The database stores data for injection molding material models. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements a simulation analysis method for injection molding materials.

[0139] Those skilled in the art will understand that Figure 9 and Figure 10The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0140] In one exemplary embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to perform the following steps: meshing an injection molding material model to obtain a first mesh structure; dividing the coarse-grained mesh in the first mesh structure into fine-grained meshes to obtain a second mesh structure corresponding to the first mesh structure; performing injection molding analysis on the injection molding material represented by the injection molding material model based on the second mesh structure to determine the flow direction component of each mesh in the second mesh structure; determining the target flow direction of each mesh in the first mesh structure according to the flow direction component; and performing material structure analysis based on the target flow direction and the first mesh structure to obtain the simulation analysis results of the injection molding material.

[0141] In one embodiment, when the processor executes the computer program, it further performs the following steps: obtaining the feature plane of the injection molding material model, and determining the regular region and complex region of the feature plane respectively; dividing the regular region into a coarse-grained grid and the complex region into a fine-grained grid, to obtain a first grid structure containing the coarse-grained grid and the fine-grained grid.

[0142] In one embodiment, when the processor executes the computer program, it further performs the following steps: connecting the shortest diagonal of the coarse-grained grid, dividing the coarse-grained grid into fine-grained grids by the shortest diagonal; retaining the fine-grained grids in the first grid structure to obtain a second grid structure containing the fine-grained grids.

[0143] In one embodiment, when the processor executes the computer program, it also performs the following steps: acquiring gating information related to the injection molding material model; and determining the flow direction component based on the gating information and the position information of each grid in the second grid structure.

[0144] In one embodiment, when the processor executes the computer program, it further performs the following steps: when the fine-grained grid to which the flow direction component belongs corresponds to a fine-grained grid in the first grid structure, the flow direction component is determined as the target flow direction; when the fine-grained grid to which the flow direction component belongs belongs to a coarse-grained grid in the first grid structure, the direction allocation weight corresponding to the flow direction component is determined, the flow direction component is weighted according to the direction allocation weight, and the partial weighted result is summed with the remaining weighted result of the coarse-grained grid to obtain the target flow direction.

[0145] In one embodiment, when the processor executes the computer program, it further performs the following steps: mapping the target flow direction to a first mesh structure; based on the target flow direction, constructing a stress anisotropic elastic matrix for each mesh in the first mesh structure, and obtaining the simulation analysis results of the injection molding material.

[0146] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, it performs the following steps: meshing an injection molding material model to obtain a first mesh structure; dividing the coarse-grained mesh in the first mesh structure into fine-grained meshes to obtain a second mesh structure corresponding to the first mesh structure; performing injection molding analysis on the injection molding material represented by the injection molding material model based on the second mesh structure, and determining the flow direction component of each mesh in the second mesh structure; determining the target flow direction of each mesh in the first mesh structure according to the flow direction component; and performing material structure analysis based on the target flow direction and the first mesh structure to obtain the simulation analysis results of the injection molding material.

[0147] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: obtaining the feature plane of the injection molding material model, and determining the regular region and complex region of the feature plane respectively; dividing the regular region into a coarse-grained grid and the complex region into a fine-grained grid, to obtain a first grid structure containing the coarse-grained grid and the fine-grained grid.

[0148] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: connecting the shortest diagonal of the coarse-grained grid, dividing the coarse-grained grid into fine-grained grids by the shortest diagonal; retaining the fine-grained grids in the first grid structure to obtain a second grid structure containing the fine-grained grids.

[0149] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: acquiring gating information related to the injection molding material model; and determining the flow direction component based on the gating information and the position information of each grid in the second grid structure.

[0150] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: when the fine-grained grid to which the flow direction component belongs corresponds to a fine-grained grid in the first grid structure, the flow direction component is determined as the target flow direction; when the fine-grained grid to which the flow direction component belongs belongs to a coarse-grained grid in the first grid structure, the direction allocation weight corresponding to the flow direction component is determined, the flow direction component is weighted according to the direction allocation weight, and the obtained partial weighted result is summed with the remaining weighted result of the coarse-grained grid to obtain the target flow direction.

[0151] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: mapping the target flow direction to the first mesh structure; based on the target flow direction, constructing a stress anisotropic elastic matrix for each mesh in the first mesh structure, and obtaining the simulation analysis results of the injection molding material.

[0152] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, performs the following steps: meshing an injection molding material model to obtain a first mesh structure; dividing the coarse-grained mesh in the first mesh structure into fine-grained meshes to obtain a second mesh structure corresponding to the first mesh structure; performing injection molding analysis on the injection molding material represented by the injection molding material model based on the second mesh structure, and determining the flow direction components of each mesh in the second mesh structure; determining the target flow direction of each mesh in the first mesh structure based on the flow direction components; and performing material structure analysis based on the target flow direction and the first mesh structure to obtain the simulation analysis results of the injection molding material.

[0153] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: obtaining the feature plane of the injection molding material model, and determining the regular region and complex region of the feature plane respectively; dividing the regular region into a coarse-grained grid and the complex region into a fine-grained grid, to obtain a first grid structure containing the coarse-grained grid and the fine-grained grid.

[0154] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: connecting the shortest diagonal of the coarse-grained grid, dividing the coarse-grained grid into fine-grained grids by the shortest diagonal; retaining the fine-grained grids in the first grid structure to obtain a second grid structure containing the fine-grained grids.

[0155] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: acquiring gating information related to the injection molding material model; and determining the flow direction component based on the gating information and the position information of each grid in the second grid structure.

[0156] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: when the fine-grained grid to which the flow direction component belongs corresponds to a fine-grained grid in the first grid structure, the flow direction component is determined as the target flow direction; when the fine-grained grid to which the flow direction component belongs belongs to a coarse-grained grid in the first grid structure, the direction allocation weight corresponding to the flow direction component is determined, the flow direction component is weighted according to the direction allocation weight, and the obtained partial weighted result is summed with the remaining weighted result of the coarse-grained grid to obtain the target flow direction.

[0157] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: mapping the target flow direction to the first mesh structure; based on the target flow direction, constructing a stress anisotropic elastic matrix for each mesh in the first mesh structure, and obtaining the simulation analysis results of the injection molding material.

[0158] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0159] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0160] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A simulation analysis method for injection molding materials, characterized in that, The method includes: The injection molding material model is meshed to obtain the first mesh structure; The coarse-grained grid in the first grid structure is divided into fine-grained grids to obtain a second grid structure corresponding to the first grid structure; Based on the second mesh structure, the injection molding analysis of the injection molding material represented by the injection molding material model is performed to determine the flow direction component of each mesh in the second mesh structure; Based on the flow direction component, the target flow direction of each grid in the first grid structure is determined; Based on the target flow direction and the first mesh structure, material structure analysis is performed to obtain the simulation analysis results of the injection molding material.

2. The method according to claim 1, characterized in that, The process of meshing the injection molding material model to obtain the first mesh structure includes: Obtain the feature planes of the injection molding material model, and determine the regular and complex regions of the feature planes respectively; The regular region is divided into a coarse-grained grid, and the complex region is divided into a fine-grained grid, resulting in a first grid structure that includes the coarse-grained grid and the fine-grained grid.

3. The method according to claim 2, characterized in that, The step of dividing the coarse-grained grid in the first grid structure into a fine-grained grid to obtain a second grid structure corresponding to the first grid structure includes: Connect the shortest diagonal of the coarse-grained grid, and divide the coarse-grained grid into fine-grained grids through the shortest diagonal; By retaining the fine-grained mesh in the first mesh structure, a second mesh structure containing the fine-grained mesh is obtained.

4. The method according to claim 1, characterized in that, The step of performing injection molding analysis on the injection molding material represented by the injection molding material model based on the second mesh structure, and determining the flow direction components of each mesh in the second mesh structure, includes: Obtain the casting information related to the injection molding material model; The flow direction component is determined based on the pouring information and the position information of each grid in the second grid structure.

5. The method according to claim 1, characterized in that, Determining the target flow direction of each grid in the first grid structure based on the flow direction component includes: When the fine-grained grid to which the flow direction component belongs corresponds to the fine-grained grid in the first grid structure, the flow direction component is determined as the target flow direction; When the fine-grained grid to which the flow direction component belongs belongs to the coarse-grained grid in the first grid structure, the direction assignment weight corresponding to the flow direction component is determined, the flow direction component is weighted according to the direction assignment weight, and the obtained partial weighted result is summed with the remaining weighted result of the coarse-grained grid to obtain the target flow direction.

6. The method according to claim 1, characterized in that, The material structure analysis based on the target flow direction and the first mesh structure, to obtain the simulation analysis results of the injection molding material, includes: Map the target flow direction onto the first mesh structure; Based on the target flow direction, a stress anisotropic elastic matrix is ​​constructed for each grid in the first grid structure to obtain the simulation analysis results of the injection molding material.

7. A simulation analysis device for injection molding materials, characterized in that, The device includes: The first mesh generation module is used to generate a mesh for the injection molding material model to obtain the first mesh structure. The second mesh generation module is used to divide the coarse-grained mesh in the first mesh structure into fine-grained meshes to obtain a second mesh structure corresponding to the first mesh structure. The injection molding analysis module is used to perform injection molding analysis on the injection molding material represented by the injection molding material model based on the second grid structure, and to determine the flow direction component of each grid in the second grid structure. The flow direction determination module is used to determine the target flow direction of each grid in the first grid structure based on the flow direction component. The material structure analysis module is used to perform material structure analysis based on the target flow direction and the first mesh structure to obtain the simulation analysis results of the injection molding material.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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