Mould manufacturing method based on fused deposition modeling and composite material mould obtained through method
By using melt deposition forming technology for interlaced stacking and high-temperature repair in composite mold manufacturing, the problems of mismatched thermal expansion coefficients and poor interlayer bonding performance of traditional molds are solved, the mechanical properties and thermal expansion properties of the mold are improved, and the higher Quality composite molds.
Patent Information
- Application Number
- CN202411133095.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2024-12-31
AI Technical Summary
Due to the mismatch between the thermal expansion coefficient between the metal-based mold and the composite parts, the composite parts have poor dimensional accuracy, large curing stress, low profile accuracy, and poor interlayer bonding performance of the melt deposition forming technology. and the problem of difficult to control fiber orientation.
By adopting a mold manufacturing method based on melt deposition molding, composite material molds with directional fiber orientation and improved thermal expansion properties are obtained by granulating composite materials, interleaved stacking assembly, high-temperature melt repair, heat treatment and mechanical processing.
Improve the interlayer bonding of the mold and the fiber orientation in the Z-axis direction, improve the mechanical properties, reduce the thermal expansion coefficient, reduce the interface influence of the bonding, avoid crack transfer, and ultimately obtain better quality and better application effect. Excellent composite mold.
Smart Images
Figure CN119217601A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of additive manufacturing, and in particular to a mold manufacturing method based on fused deposition modeling and a composite material mold obtained by using the method. Background Art
[0002] Composite materials have the advantages of high specific strength and high specific stiffness, and have become one of the important lightweight structural materials in the aerospace field. Traditional composite molding molds with traditional metal structures as the main form face the problem of mismatched thermal expansion coefficients between metal-based molds and composite parts, which leads to interaction between composite parts and molds, causing composite parts to undergo curing deformation, resulting in poor dimensional accuracy of composite parts, high curing stress, and low surface accuracy.
[0003] Therefore, using thermoplastic composite materials for melt deposition molding to replace metal molds has become a new research hotspot and development trend for composite molding molds. However, the effect of molds prepared by melt deposition molding technology is poor, and the parts have the disadvantage of poor interlayer bonding performance. In addition, due to the fiber orientation and anisotropy unique to melt deposition molding technology, the thermal expansion coefficient in the Z-axis direction is difficult to control. Summary of the invention
[0004] The main purpose of the present application is to provide a mold manufacturing method based on fused deposition modeling and a composite material mold obtained by using the method, aiming to solve the problem of poor effect of molds prepared by fused deposition modeling technology in the prior art.
[0005] The technical solutions adopted in this application are as follows:
[0006] In a first aspect, an embodiment of the present application provides a mold manufacturing method based on fused deposition modeling, comprising the following steps:
[0007] Granulating the composite material to obtain a plurality of square particles;
[0008] According to the fused deposition modeling digital model of the target mold, the block particles are stacked and assembled in an interlaced manner to obtain an assembled model;
[0009] Repairing the assembled model based on high temperature melting to obtain a mold blank;
[0010] Heat treating the mold blank to obtain a mold blank;
[0011] The mold blank is machined to obtain the target mold.
[0012] In a possible implementation of the first aspect, before granulating the composite material to obtain a plurality of cube particles, the method further includes:
[0013] The fiber powder and the polycarbonate powder are uniformly mixed, and a composite material is prepared by using an extrusion device.
[0014] In a possible implementation manner of the first aspect, the fiber powder is carbon fiber powder or silicon carbide fabric powder.
[0015] In a possible implementation of the first aspect, the fibers of the fiber powder are bundle fibers, and the number of single filaments in the bundle fibers is from one thousand to twelve thousand.
[0016] In a possible implementation manner of the first aspect, the melt index of the polycarbonate powder is 8 g-20 g / 10 min.
[0017] In a possible implementation of the first aspect, the assembled model is repaired based on high temperature melting to obtain a mold blank, including:
[0018] The same composite material is melted at high temperature at the contact gap of the assembled model to achieve repair and obtain a mold blank.
[0019] In a possible implementation of the first aspect, heat treating the mold blank to obtain the mold blank includes:
[0020] The mold blank is heat treated in a heat treatment device to release stress and obtain a mold blank.
[0021] In a possible implementation of the first aspect, according to the fused deposition modeling digital model of the target mold, the block particles are stacked and assembled in an interlaced manner to obtain the assembled model, and before the method further comprises:
[0022] Modeling is performed according to the structure of the target mold, and segmentation and slicing are performed according to performance requirements to obtain a fused deposition modeling digital model of the target mold.
[0023] In a possible implementation of the first aspect, modeling is performed according to the structure of the target mold, and segmentation and slicing are performed according to performance requirements to obtain a fused deposition modeling digital model of the target mold, including:
[0024] Modeling is performed according to the structure of the target mold, and targeted filling is performed at the target location;
[0025] The target mold is segmented and sliced according to the performance requirements to obtain the fused deposition modeling digital model.
[0026] In a second aspect, an embodiment of the present application provides a composite material mold, which is obtained by using a mold manufacturing method based on fused deposition modeling as provided in any one of the first aspects above.
[0027] Compared with the prior art, the beneficial effects of this application are:
[0028] The embodiment of the present application proposes a mold manufacturing method based on fused deposition modeling and a composite material mold obtained by using the method, the method comprising: granulating the composite material to obtain a plurality of square particles; stacking and assembling the square particles in an interlaced manner according to the fused deposition modeling digital model of the target mold to obtain an assembled model; repairing the assembled model based on high-temperature melting to obtain a mold blank; heat treating the mold blank to obtain a mold blank; and machining the mold blank to obtain a target mold. The present application utilizes composite materials instead of metal materials as composite molding molds. First, by granulating the composite materials, block particles that can be assembled are obtained. Secondly, the block particles are staggered and stacked according to the fused deposition modeling technology. The obtained mold is directional arranged in the printing thick layer direction, that is, the Z-axis direction, which can improve the interlayer bonding and the fiber orientation in the Z-axis direction, improve the mechanical properties while reducing the thermal thermal expansion coefficient. The assembled model is then repaired by high-temperature melting, which can effectively reduce the interface influence at the bonding point, thereby avoiding crack transmission and improving part performance. Finally, after the mold blank is heat treated and machined, a composite material mold with better quality and better application effect can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 A schematic diagram of a process for manufacturing a mold based on fused deposition modeling provided in an embodiment of the present application;
[0030] Figure 2 A schematic diagram of granulation of a twin-screw extruder in a mold manufacturing method based on fused deposition modeling provided in an embodiment of the present application;
[0031] Figure 3 A schematic diagram of the structure of the square particles in the mold manufacturing method based on fused deposition modeling provided in an embodiment of the present application;
[0032] Figure 4 A schematic diagram of forming square particles in a mold manufacturing method based on fused deposition modeling provided in an embodiment of the present application;
[0033] Figure 5 A schematic diagram of assembling square particles in a mold manufacturing method based on fused deposition modeling provided in an embodiment of the present application;
[0034] Figure 6 A schematic diagram of mechanical processing in a mold manufacturing method based on fused deposition modeling provided in an embodiment of the present application;
[0035] Figure 7 A schematic diagram of directional filling in a mold manufacturing method based on fused deposition modeling provided in an embodiment of the present application. DETAILED DESCRIPTION
[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0037] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0038] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0040] Composite materials have the advantages of high specific strength and high specific stiffness. They have become one of the important lightweight structural materials in the aerospace field and are widely used in various parts of aircraft. The amount of composite materials used has become one of the important indicators for measuring the advancement of aircraft. Aviation composite parts are generally formed by autoclave technology, so molds are required as the main process equipment to ensure the properties, structure and quality of the parts. However, traditional composite molding molds with traditional metal structures as the main form face the problem of mismatch in thermal expansion coefficients between metal-based molds and composite parts, which leads to interaction between composite parts and molds, causing composite parts to undergo curing deformation, resulting in poor dimensional accuracy of composite parts, large curing stress, low surface accuracy and other problems. At the same time, for the verification stage, metal-based molds have high manufacturing costs and long cycles, which cannot meet the verification needs.
[0041] Therefore, the use of thermoplastic composite materials to replace metal molds has become a new research hotspot and development trend of composite molding molds. However, when preparing small batches and multiple batches of structures with complex configurations, traditional manufacturing processes also require the preparation of multiple molds in advance, resulting in excessively high part production costs and long production cycles. As a type of 3D printing technology, fused deposition modeling (FDM) heats and melts thermoplastic composite pellets through a heating device at the print nozzle, and extrudes the pellets by screw extrusion and deposits them layer by layer according to the scanning path of the part. After each layer is printed, the printing platform descends or the nozzle rises by a layer thickness to deposit a new layer. This process is repeated to finally achieve deposition molding of the part. By introducing fiber materials as a reinforcement phase, the mechanical strength of the component, especially the tensile and flexural strength and modulus, can be significantly improved, thereby achieving the performance indicators required by the mold. However, although the printing raw materials prepared in this way can meet the requirements of thermal expansion coefficient, the parts prepared by fused deposition modeling technology have the disadvantage of poor interlayer bonding performance. In addition, the problem of difficult-to-control thermal expansion coefficient in the Z-axis direction caused by the fiber orientation and anisotropy unique to FDM technology is also a key factor that troubles researchers.
[0042] To this end, the present application embodiment provides a mold manufacturing method based on fused deposition modeling, as shown in the attached Figure 1 As shown, the following steps are included:
[0043] S10: Granulate the composite material to obtain a plurality of square particles.
[0044] In the specific implementation process, the granulation here refers to using the prepared composite material as a raw material and using a single screw melt extruder to prepare the structural unit, such as the attached Figure 4As shown in the figure, each square particle is obtained by stacking layer by layer, and finally a square particle module similar to a brick with different regular structures is obtained, as shown in the figure. Figure 3 As shown, during the preparation process, nano-fillers or functional fillers such as absorbing materials can be compounded for reinforcement according to design requirements.
[0045] In one embodiment, before granulating the composite material to obtain a plurality of cube particles, the method further comprises:
[0046] The fiber powder and the polycarbonate powder are uniformly mixed, and a composite material is prepared by using an extrusion device.
[0047] In the specific implementation process, the carbon fiber powder is added into the polycarbonate powder, and after being uniformly mixed, the mixture is stirred as shown in the following figure. Figure 2 The twin-screw extruder shown is used to prepare a carbon fiber reinforced polycarbonate composite material, which is then cut and granulated by a granulator to obtain a composite material. When the parts are prepared by a conventional fused deposition modeling process, the orientation of the carbon fibers tends to the printing direction due to the shear force generated at the print head. In the thickness direction of the printed layer (Z axis), due to the absence of fiber reinforcement, the mechanical properties are weak and the linear thermal expansion coefficient is too high. However, the staggered arrangement similar to brick walling can effectively increase the fiber orientation in the Z axis direction, improve the mechanical properties and reduce the linear thermal expansion coefficient.
[0048] Furthermore, the fiber powder is carbon fiber powder or silicon carbide fabric powder, the fibers of the fiber powder are bundle fibers, the number of single fibers of the bundle fibers is one thousand to twelve thousand, and the melt index of the polycarbonate powder is 8g-20g / 10min, so as to ensure the strength of the mold after molding.
[0049] S20: According to the fused deposition modeling digital model of the target mold, the block particles are stacked and assembled in an interlaced manner to obtain an assembled model.
[0050] In the specific implementation process, the target mold, that is, the composite material mold to be manufactured, has a fused deposition modeling digital model, that is, a 3D printing digital model, and the block particles are stacked and assembled in an interlaced manner according to the overall structure of the digital model, as shown in the attached Figure 5 As shown, the assembled block particles are assembled to obtain an assembled model. In layman's terms, similar to the way of cutting wall bricks, the contact seams between two adjacent layers of stacked blocks are staggered so that there are no long straight contact seams.
[0051] In one embodiment, according to the fused deposition modeling digital model of the target mold, the block particles are stacked and assembled in an interlaced manner to obtain the assembled model, and before the method further comprises:
[0052] Modeling is performed according to the structure of the target mold, and segmentation and slicing are performed according to performance requirements to obtain a fused deposition modeling digital model of the target mold.
[0053] In the specific implementation process, the mold structure to be prepared is modeled, and divided into different structural units through software according to the performance requirements of the mold, and sliced using slicing software. The printing process parameters are determined by the material itself, and the path planning can be adjusted according to actual needs. Finite element analysis simulation calculation can be used to obtain the most suitable printing path. According to the actual use of the target mold, customization or processing is performed at the weak parts of the structure or the parts that require higher strength to achieve directional filling, such as the attached Figure 7 As shown, the combination mode can also be changed according to actual needs.
[0054] S30: Repairing the assembled model based on high temperature melting to obtain a mold blank.
[0055] In the specific implementation process, the composite material repair technology is used to melt the raw materials at high temperature at the contact gap of the module and repair them, so as to obtain a mold component similar to the accumulation of brick walls. The disorder of the carbon fibers inside the repair material also helps to reduce the anisotropy of the whole part, making the part tend to be isotropic and reducing the performance defect parts. Further, the assembly model is repaired based on high temperature melting to obtain a mold blank, including:
[0056] The same composite material is melted at high temperature at the contact gap of the assembled model to achieve repair and obtain a mold blank.
[0057] In the traditional field of resin composite materials, when conventional adhesives are used to connect various unit modules, the interface at the connection will become a path for crack propagation when the material is damaged. High-temperature molten composite materials based on composite material repair technology have the same composition as the module, which can effectively reduce the interface influence at the bonding point, thereby avoiding crack transmission and improving part performance.
[0058] S40: heat treating the mold blank to obtain a mold blank.
[0059] In the specific implementation process, the obtained mold blank is heat-treated to release stress to obtain a mold blank. The heat treatment can be achieved by a heat treatment device, such as an oven, an autoclave, etc., and the mold blank is placed in the heat treatment device for heat treatment. That is, heat-treating the mold blank to obtain the mold blank includes:
[0060] The mold blank is heat treated in a heat treatment device to release stress and obtain a mold blank.
[0061] S50: machining the mold blank to obtain a target mold.
[0062] In the specific implementation process, as shown in the attached Figure 6 As shown in the figure, according to the part structure that needs to be prepared in the actual application of the mold, the mold blank is machined, and it is processed into a mold that can be used for composite material molding by cutting, grinding, etc., that is, the target mold. For example, some special structures, such as curved surfaces, can be obtained by machining after heat treatment, and finite element simulation can be performed according to requirements to obtain the most economical shape and size.
[0063] In this embodiment, composite materials are used instead of metal materials as composite molding molds. First, the composite materials are granulated to obtain assembled square particles. Secondly, the square particles are staggered and stacked according to the fused deposition modeling technology. The obtained mold is directional arranged in the printing thick layer direction, that is, the Z-axis direction, which can improve the interlayer bonding and the fiber orientation in the Z-axis direction, improve the mechanical properties while reducing the thermal expansion coefficient. The assembled model is then repaired by high-temperature melting, which can effectively reduce the interface influence at the bonding point, thereby avoiding crack transmission and improving part performance. Finally, after the mold blank is heat treated and machined, a composite material mold with better quality and better application effect can be obtained.
[0064] Taking carbon fiber reinforced polycarbonate mold as an example, this application is further explained:
[0065] 1) Through a twin-screw extruder, a polycarbonate resin powder with a melt index of 10g / 10min and 12K short-cut carbon fiber (length of 0.3mm) are blended at a mass ratio of 8:2, and 0.3wt% lubricant and 0.4wt% antioxidant are added. After uniform mixing, the raw materials are melt-filamented through a twin-screw extruder, and prepared into pellets after passing through a pelletizer. The temperatures of each zone of the twin-screw extruder are: (1) Zone 2 temperature: 250°C; (2) Zone 3 temperature: 260°C; (3) Zones 4-6 temperature: 270°C; (4) Zones 7-11 temperature: 280°C; (5) Head temperature: 280°C.
[0066] 2) Model the mold structure to be prepared, split it into different structural units through software according to the performance requirements of the mold, and slice it using slicing software.
[0067] 3) The prepared carbon fiber reinforced polycarbonate pellets are used as raw materials, and a single-screw melt extruder is used to prepare a mold structure unit cell, and finally a brick-like block model with different regular structures is obtained.
[0068] 4) The mold cells are assembled according to the design requirements. The same carbon fiber reinforced polycarbonate composite material (polycarbonate resin powder with a melt index of 10g / 10min and 12K chopped carbon fiber (length of 0.3mm)) is used as the raw material of the repair agent at the joints of each unit cell. The raw materials are melted at high temperature into a molten state and applied to the joints. After cooling, a mold component similar to a brick wall stack is obtained.
[0069] 5) Use an oven or autoclave to heat treat the mold components in the tank to release stress and obtain a mold blank. The heat treatment process is as follows: (1) heating from room temperature to 140°C at a heating rate of 10°C / h; (2) keeping at 140°C for 2h; (3) cooling in the furnace.
[0070] 6) The mold blank is machined to prepare a mold for composite material molding. After sampling and testing, the linear thermal expansion coefficient of the Z axis is reduced to 10×10 -6 / ℃.
[0071] The modular mold design scheme based on fused deposition modeling prepared by the above method provided in this application has significantly improved tensile properties in the Z-axis direction compared to conventional 3D printing molds. The parts obtained by conventional 3D printing processes have weak interlayer bonding and poor Z-direction tensile properties due to the gaps between different printed layers in the Z-axis direction. By adopting the modular design mold part preparation idea in this application, the modules can be arranged in a direction in the Z-axis direction according to the mold performance requirements, which can effectively improve the Z-direction tensile properties. Taking the carbon fiber reinforced polycarbonate resin mold as an example, the Z-direction tensile properties can be improved by 20%.
[0072] In addition, the modular mold design based on fused deposition modeling prepared by the above method provided in this application has a significantly lower linear thermal expansion coefficient in the Z axis than that of conventional 3D printing molds. In the conventional 3D printing process, the carbon fibers tend to be arranged in the printing direction due to the shear force at the print head, resulting in no carbon fiber arrangement in the Z axis direction of the part. There is no carbon fiber restriction during the temperature increase and expansion of the mold, resulting in excessive expansion of the resin matrix, which manifests as a high linear thermal expansion coefficient in the Z axis. By adopting the modular design mold part preparation idea in this application, the modules can be arranged in a direction in the Z axis according to the mold performance requirements, so that the carbon fibers in specific parts tend to be distributed in the Z axis direction, which significantly reduces the linear thermal expansion coefficient of the Z axis and approaches the linear thermal expansion coefficient of the X axis. Taking the carbon fiber reinforced polycarbonate resin mold as an example, the linear thermal expansion coefficient of the Z axis can be increased from 90×10 -6 / ℃ is reduced to 10×10 -6 / ℃.
[0073] Based on the same inventive concept as the aforementioned embodiment, the embodiment of the present application further provides a composite material mold, which is obtained by using the mold manufacturing method based on fused deposition modeling as provided in the embodiment of the present application.
[0074] The principle and beneficial effects of this embodiment can be referred to the aforementioned embodiment of the mold manufacturing method based on fused deposition modeling, and will not be repeated here.
[0075] In summary, the embodiments of the present application propose a mold manufacturing method based on fused deposition modeling and a composite material mold obtained by the method, the method comprising: granulating the composite material to obtain a plurality of square particles; according to the fused deposition modeling digital model of the target mold, stacking and assembling the square particles in an interlaced manner to obtain an assembled model; repairing the assembled model based on high-temperature melting to obtain a mold blank; heat treating the mold blank to obtain a mold blank; and machining the mold blank to obtain a target mold. The present application utilizes composite materials instead of metal materials as composite molding molds. First, by granulating the composite materials, block particles that can be assembled are obtained. Secondly, the block particles are staggered and stacked according to the fused deposition modeling technology. The obtained mold is directional arranged in the printing thick layer direction, that is, the Z-axis direction, which can improve the interlayer bonding and the fiber orientation in the Z-axis direction, improve the mechanical properties while reducing the thermal thermal expansion coefficient. The assembled model is then repaired by high-temperature melting, which can effectively reduce the interface influence at the bonding point, thereby avoiding crack transmission and improving part performance. Finally, after the mold blank is heat treated and machined, a composite material mold with better quality and better application effect can be obtained.
[0076] 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 spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A mold manufacturing method based on fused deposition modeling, characterized in that: The steps include: Granulating the composite material to obtain a plurality of square particles; According to the fused deposition modeling digital model of the target mold, the block particles are stacked and assembled in an interlaced manner to obtain an assembled model; Repairing the assembled model based on high temperature melting to obtain a mold blank; Heat treating the mold blank to obtain a mold blank; The mold blank is machined to obtain the target mold.
2. The mold manufacturing method based on fused deposition modeling according to claim 1, characterized in that: Before granulating the composite material to obtain a plurality of cube particles, the method further comprises: The fiber powder and the polycarbonate powder are uniformly mixed, and the composite material is prepared by using an extrusion device.
3. The mold manufacturing method based on fused deposition modeling according to claim 2, characterized in that: The fiber powder is carbon fiber powder or silicon carbide fabric powder.
4. The mold manufacturing method based on fused deposition modeling according to claim 2, characterized in that: The fibers of the fiber powder are bundle fibers, and the number of single filaments of the bundle fibers is one thousand to twelve thousand.
5. The mold manufacturing method based on fused deposition modeling according to claim 2, characterized in that: The melt index of the polycarbonate powder is 8g-20g / 10min.
6. The mold manufacturing method based on fused deposition modeling according to claim 1, characterized in that: The step of repairing the assembled model based on high temperature melting to obtain a mold blank comprises: The same composite material is melted at high temperature at the contact gap of the assembled model to achieve repair and obtain a mold blank.
7. The mold manufacturing method based on fused deposition modeling according to claim 1, characterized in that: The step of heat treating the mold blank to obtain a mold blank comprises: The mold blank is heat-treated in a heat treatment device to release stress and obtain a mold blank.
8. The mold manufacturing method based on fused deposition modeling according to claim 1, characterized in that: Before the block particles are stacked and assembled in an interlaced manner according to the fused deposition modeling digital model of the target mold to obtain the assembled model, the method further comprises: Modeling is performed according to the structure of the target mold, and segmentation and slicing are performed according to performance requirements to obtain a fused deposition modeling digital model of the target mold.
9. The mold manufacturing method based on fused deposition modeling according to claim 8, characterized in that: The method of modeling the target mold according to its structure and segmenting and slicing the target mold according to performance requirements to obtain a fused deposition modeling digital model of the target mold includes: Modeling is performed according to the structure of the target mold, and targeted filling is performed at the target location; The target mold is segmented and sliced according to the performance requirements to obtain a fused deposition modeling digital model.
10. A composite material mold, characterized in that: The mold is obtained by using the mold manufacturing method based on fused deposition modeling as described in any one of claims 1 to 9.