Rapid forming mold structure and forming method of fiber composite material vehicle tail wing

Abstract

The invention discloses a fiber composite material vehicle spoiler rapid forming mold structure and a forming method thereof.The fiber composite material vehicle spoiler rapid forming mold structure comprises a lower mold body and an upper mold body, the lower mold body and the upper mold body are mutually closed to form a cavity matched with a vehicle spoiler and used for achieving forming machining of the vehicle spoiler, and a lower mold heat insulation plate is connected to the bottom of the lower mold body through a bolt; and the upper die heat insulation plate is connected to the top of the upper die main body through a bolt, so that the heat insulation effect on the upper die main body is achieved. According to the invention, by designing the die-fitting surface cavities of the lower die main body and the upper die main body, cooperating with the blowing inner bag matched with the inner cavity of the car spoiler, and combining a double-pressure control mode of positive pressure of the inner bag and negative pressure of the cavity, the carbon fiber prepreg and the die cavity surface are tightly and uniformly fitted, and meanwhile, the limiting boss structure is used for preventing die assembly deviation, so that the production efficiency is improved. And the outer contour size precision and the surface flatness of the vehicle spoiler are greatly improved, and the product percent of pass is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of molding die application technology, and in particular to a rapid prototyping die structure and molding method for a fiber composite material car rear wing. Background Technology

[0002] The pure electric vehicle industry is experiencing rapid development, with lightweighting becoming one of its core development directions. Carbon fiber composites, with their excellent lightweight and high strength properties, are increasingly widely used in the manufacturing of pure electric vehicle components. As a crucial automotive part, the research and application of fiber composite materials in the manufacture of rear spoilers has also progressed rapidly. Currently, the mainstream manufacturing methods for fiber composite rear spoilers in the industry are autoclave molding or compression molding, both of which rely on specialized molding dies to complete the rear spoiler forming process.

[0003] Existing fiber composite material car spoiler molding processes and related molds have significant technical defects, becoming a key issue restricting the industry's development. On the one hand, the autoclave process requires placing the entire mold inside an autoclave for heating and curing, which not only involves cumbersome production procedures and long molding cycles with low production efficiency, but also significantly increases the manufacturing cost of car spoilers due to high equipment investment and operating costs. On the other hand, the molding mold structure design of traditional compression molding processes is complex, and the mold assembly and disassembly and operation processes are cumbersome, requiring a high level of operator skill. Furthermore, the low heating and cooling efficiency of the mold further prolongs the molding cycle. At the same time, the lack of precise pressure control and limiting structures in the mold can easily lead to poor surface flatness and low product qualification rate after molding, making it unsuitable for the continuous operation requirements of industrial production. Therefore, this invention proposes a rapid molding mold structure and molding method for fiber composite material car spoilers. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a rapid prototyping mold structure and molding method for fiber composite material car rear wings, thereby solving the problems of low production efficiency, high manufacturing cost, inconvenient operation of molding molds, and poor product molding accuracy of existing fiber composite material car rear wings.

[0005] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is: to provide a rapid prototyping mold structure for a car rear wing made of fiber composite material, including a lower mold body and an upper mold body, wherein the lower mold body and the upper mold body are closed to form a cavity adapted to the car rear wing, for realizing the molding process of the car rear wing;

[0006] The lower mold heat insulation plate is bolted to the bottom of the lower mold body and serves to insulate the lower mold body.

[0007] The upper mold heat insulation plate is bolted to the top of the upper mold body and serves to insulate the upper mold body.

[0008] The quick-connect air-blowing connector A is provided in two parts and is symmetrically bolted to the top of the upper mold body about the middle position. The quick-connect air-blowing connector A is connected to an air compressor and is used to introduce positive pressure gas into the air-blowing inner bag inside the mold cavity.

[0009] The quick-connect air-blowing connector B is provided in two parts and is symmetrically bolted to the top of the upper mold body about the middle position. The quick-connect air-blowing connector B is connected to a pressure gauge to monitor the pressure value inside the air-blowing inner bag.

[0010] The vacuum quick-connector is provided in two parts and is symmetrically installed on the upper mold body near both ends. The vacuum quick-connector is connected to a negative pressure machine and is used to perform vacuuming operations on the cavity of the mold.

[0011] The support blocks are four in number and are respectively installed at the four corners of the top of the upper mold body, which play a supporting and limiting role in the mold closing and forming process;

[0012] The mold lifting rods are respectively installed at both ends of the lower mold body and the upper mold body, which facilitates the handling, disassembly and assembly of the mold and the mold closing operation;

[0013] The steam quick-connect fitting is connected to the middle and near the end face of the side wall of the lower mold body and the upper mold body, respectively. The steam quick-connect fitting can be selectively connected to a steam mold temperature controller and a cooling water supply device to realize the heating and cooling of the mold.

[0014] The present invention is further configured such that the surfaces of the lower mold body and the upper mold body are designed according to the outer side of the car rear wing product to ensure that the outer contour of the car rear wing after molding is consistent with the design dimensions.

[0015] Through the above technical solution, the cavity surfaces of the lower mold body and the upper mold body are precisely fitted and matched with the outer surface of the car rear wing. The carbon fiber prepreg can be completely formed along the surface during the molding process, which ensures the dimensional accuracy of the outer contour of the car rear wing from a structural point of view and avoids the problem of unqualified product shape due to surface deviation.

[0016] The present invention is further configured such that: an air-blowing inner bag is adapted to be placed inside the cavity of the lower mold body, the structure of the air-blowing inner bag is consistent with the inner cavity structure of the rear wing of the vehicle, and the air-blowing inner bag is connected to air-blowing quick-connect connector A and air-blowing quick-connect connector B.

[0017] Through the above technical solution, by using an air-blown inner bag that is consistent with the internal structure of the rear wing, a pressure surface that is adapted to the internal cavity of the rear wing can be formed after positive pressure gas is introduced. This allows the pressure of the positive pressure gas to be evenly transmitted to the inner surface of the carbon fiber prepreg through the air-blown inner bag, pushing the prepreg to fit tightly with the cavity surfaces of the lower mold body and the upper mold body. At the same time, the pressure inside the bag is monitored in real time through the air-blown quick-connect connector B, so as to achieve precise pressure control.

[0018] The present invention is further configured such that: a limiting boss structure is provided at the mold closing point of the lower mold body and the upper mold body, the limiting boss structure is used to prevent the pressure plate from shifting during the mold pressing process, and to ensure the flatness of the inner surface of the molded part.

[0019] The above technical solution utilizes a limiting boss structure to mechanically limit the mold closing position of the lower mold body and the upper mold body. During the mold pressurization and heating curing process, it can effectively limit the displacement of the upper mold body relative to the lower mold body, avoid uneven cavity gap caused by pressure plate offset, and thus ensure the forming flatness of the inner surface of the rear spoiler.

[0020] The present invention is further configured such that the lower mold body and the upper mold body are detachably connected by bolts, thereby completing the fixation after mold closing and facilitating the disassembly and assembly of the mold and the removal of the parts.

[0021] The above technical solution, which uses a detachable fixing method with bolted connection, enables quick mold closing and separation of the lower mold body and the upper mold body. Compared with the traditional snap-fit ​​or welding structure, the operation process is simpler, greatly shortens the mold assembly and disassembly time, and improves the efficiency of part removal.

[0022] The present invention is further configured such that both the lower mold heat insulation plate and the upper mold heat insulation plate are made of high temperature resistant heat insulation material, which can effectively reduce heat loss during the mold heating and curing process and improve the heat preservation effect of the mold.

[0023] By utilizing the thermal barrier properties of high-temperature resistant heat-insulating materials, the heat transfer from the lower mold body and the upper mold body to the external environment during the heating and curing process is reduced, thus keeping the temperature inside the mold cavity stable and avoiding uneven cavity temperature caused by heat loss. At the same time, the thermal energy utilization rate is improved and the heating energy consumption is reduced.

[0024] The present invention is further configured such that: the support block is made of high-strength hard alloy material, and its height is greater than the thickness of the upper mold heat insulation plate.

[0025] Through the above technical solution, the support block made of high-strength hard alloy material can provide stable support force, avoid deformation of the upper mold body caused by force during mold closing and pressurization, and the height of the support block is higher than the thickness of the upper mold heat insulation plate, which can form a gap between the upper mold heat insulation plate and the placement surface, prevent heat loss caused by direct contact between the heat insulation plate and the placement surface, and ensure the stability of mold placement.

[0026] The present invention is further configured such that the lifting rod is fixedly connected to the lower mold body and the upper mold body by welding or bolts, and the outer wall of the lifting rod is provided with anti-slip texture.

[0027] Through the above technical solutions, the welding or bolting connection method ensures the structural strength of the connection between the lifting rod and the mold body, meeting the force requirements during mold handling and disassembly. The anti-slip texture on the outer wall of the lifting rod can increase the friction between the operator's hand and the rod, preventing slippage during handling and improving the safety of mold operation.

[0028] The present invention is further configured such that the steam quick-connect connector is a quick-connect structure, which can realize quick docking and disassembly with the steam mold temperature controller and cooling water supply device, thereby improving the operating efficiency of mold heating and cooling.

[0029] Through the above technical solution, the quick-connect steam connector can achieve tool-free quick docking and disassembly with steam mold temperature controllers and cooling water supply devices, replacing the traditional threaded connection method, greatly shortening the equipment docking time of mold heating and cooling processes, while ensuring the sealing of the connection to avoid steam or cooling water leakage.

[0030] On the other hand, a method for forming a rapid prototyping mold structure for a fiber composite material vehicle rear wing is provided, including the following steps:

[0031] S1. Mold preheating: Connect the steam quick-connect fitting to the steam mold temperature controller, and introduce preheated steam into the mold through the steam quick-connect fitting to preheat the lower mold body and the upper mold body as a whole to 40°C, and keep it at that temperature for 30 minutes.

[0032] S2. Prepreg application: After preheating, carbon fiber prepreg is applied to the inner wall of the cavity of the lower mold body, and carbon fiber prepreg is also applied to the inner wall of the cavity of the upper mold body, ensuring that the prepreg is applied flat, without wrinkles or hollow areas; after application, a high-temperature resistant air-blowing inner bag that is compatible with the inner cavity structure of the rear wing is placed inside the cavity of the lower mold body, and the air-blowing inner bag is connected to the air-blowing quick-connect connector A and air-blowing quick-connect connector B.

[0033] S3. Mold Closure: The upper mold body and the lower mold body are precisely closed and fixedly connected by bolts to form a complete sealed cavity. During the mold closure process, the limiting boss structure ensures the mold closure accuracy and prevents the pressure plate from shifting.

[0034] S4. Pressurization and Vacuuming: Connect the quick-connect air-blowing connector A to the air compressor, and introduce positive pressure gas into the inner bag through the quick-connect air-blowing connector A to pressurize the pressure inside the bag to 0.9MPa and maintain this pressure value. At the same time, monitor the pressure inside the bag in real time through the pressure gauge connected to the quick-connect air-blowing connector B. Connect the quick-connect vacuuming connector to the negative pressure machine to perform vacuuming operation on the cavity of the mold, and pump the negative pressure inside the cavity to above 0.08MPa and maintain this negative pressure value.

[0035] S5. Heat curing: Maintain the pressure and vacuum state of the mold, continuously connect the steam quick connector to the steam mold temperature controller, introduce high temperature steam into the mold, rapidly raise the overall temperature of the mold to 145℃, and continue to heat and cure at this temperature for 2 hours to fully cure and shape the carbon fiber prepreg.

[0036] S6. Mold Cooling: After heating and curing, disconnect the steam quick-connect fitting from the steam mold temperature controller and connect it to the cooling water supply device. Then, introduce cooling water into the mold through the steam quick-connect fitting and use water cooling to reduce the overall temperature of the mold to below 60°C.

[0037] S7. Demolding and Part Removal: After the mold has cooled down, remove the fixing bolts between the lower mold body and the upper mold body, separate the upper mold body and the lower mold body, and then take out the molded fiber composite material rear wing part from the cavity to complete the entire molding operation.

[0038] The beneficial effects of this invention are as follows:

[0039] 1. This invention designs the mold surface cavities of the lower mold body and the upper mold body, and uses an air-blowing inner bag adapted to the inner cavity of the car rear wing. By combining the positive pressure of the inner bag and the negative pressure of the cavity, the carbon fiber prepreg is tightly and evenly bonded to the mold cavity surface. At the same time, the limiting boss structure prevents mold closing deviation, which greatly improves the outer contour dimensional accuracy and surface flatness of the car rear wing, and effectively improves the product qualification rate.

[0040] 2. This invention enables rapid switching between steam heating and water cooling via a steam quick-connect coupling, replacing the traditional autoclave heating method. The mold can be heated and cured without entering the autoclave, significantly shortening the heating and cooling cycle of the mold. At the same time, it simplifies the molding process, improves the overall production efficiency of fiber composite material car rear wings, and reduces equipment investment and operating costs.

[0041] 3. The mold structure of the present invention is compact, and each component adopts convenient structure such as bolt connection and quick-connect joint. With auxiliary components such as mold lifting rod and support block, the operation of mold handling, disassembly and assembly, and equipment docking is more convenient. It has low requirements for the operator's skill level, greatly reduces the labor intensity of the operator, and the overall manufacturing cost of the mold is low. It is easy to install and maintain and can adapt to the needs of uninterrupted continuous operation in industrial production.

[0042] 4. By setting up a lower mold heat insulation plate and an upper mold heat insulation plate, this invention effectively reduces heat loss during the mold heating and curing process, improves heat energy utilization, and reduces heating energy consumption. At the same time, the design of each quick-connect joint and detachable connection structure ensures the sealing and stability of mold operation, avoids problems such as steam and cooling water leakage and pressure runaway, and greatly improves the working reliability of the mold.

[0043] 5. The molding die and molding method of the present invention are not only applicable to the molding of fiber composite material car rear wings, but also allow for the adjustment of the cavity and air-blowing inner bag structure according to the product structure, and can be extended to the molding and processing of other composite material automotive parts, thus having broad industrial application value. Attached Figure Description

[0044] Figure 1 This is a structural diagram of the vehicle's rear wing in this invention;

[0045] Figure 2 This is a structural diagram of the molding die in this invention;

[0046] Figure 3 This is a top view of the molding die in this invention;

[0047] Figure 4 for Figure 3 Cross-sectional view at point AA;

[0048] Figure 5 for Figure 3 Cross-sectional view at point BB.

[0049] In the diagram: 1. Rear spoiler; 2. Lower mold heat insulation plate; 3. Lower mold body; 4. Upper mold body; 5. Upper mold heat insulation plate; 6. Air blowing quick connector A; 7. Air blowing quick connector B; 8. Vacuum quick connector; 9. Support block; 10. Mold lifting rod; 11. Steam quick connector. Detailed Implementation

[0050] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0051] like Figures 1-4As shown, a rapid prototyping mold structure for a fiber composite material car rear wing includes a lower mold body 3 and an upper mold body 4. The lower mold body 3 and the upper mold body 4 are joined together to form a cavity that fits the car rear wing 1, which is used to realize the molding process of the car rear wing.

[0052] The surfaces of the lower mold body 3 and the upper mold body 4 are designed according to the outer side molding surface of the car rear wing product, ensuring that the outer contour of the car rear wing after molding is consistent with the design size. This allows the cavity surfaces of the lower mold body 3 and the upper mold body 4 to form a precise fit with the outer surface of the car rear wing 1. The carbon fiber prepreg can be completely formed along the surface during the molding process, ensuring the dimensional accuracy of the outer contour of the car rear wing 1 from a structural perspective and avoiding product shape defects caused by surface deviation.

[0053] An air-blown inner bag is fitted inside the cavity of the lower mold body 3. The structure of the air-blown inner bag is consistent with the inner cavity structure of the rear spoiler 1. The air-blown inner bag is connected to the air-blown quick-connect connector A6 and the air-blown quick-connect connector B7. By using the air-blown inner bag, which is consistent with the inner cavity structure of the rear spoiler 1, a pressure surface that is compatible with the inner cavity of the rear spoiler 1 can be formed after positive pressure gas is introduced. This allows the pressure of the positive pressure gas to be evenly transmitted to the inner surface of the carbon fiber prepreg through the air-blown inner bag, pushing the prepreg to fit tightly against the cavity surfaces of the lower mold body 3 and the upper mold body 4. At the same time, the pressure inside the bag is monitored in real time through the air-blown quick-connect connector B7 to achieve precise pressure control.

[0054] A limiting boss structure is provided at the mold closing position of the lower mold body 3 and the upper mold body 4. The limiting boss structure is used to prevent the pressure plate from shifting during the mold pressing process, ensuring the flatness of the inner surface of the molded part. The limiting boss structure forms a mechanical limit on the mold closing position of the lower mold body 3 and the upper mold body 4. During the mold pressing and heating curing process, it can effectively limit the displacement of the upper mold body 4 relative to the lower mold body 3, avoid the problem of uneven cavity clearance caused by the pressure plate shift, and thus ensure the molding flatness of the inner surface of the rear spoiler 1.

[0055] like Figure 2 As shown, the lower mold body 3 and the upper mold body 4 are detachably connected by bolts, which completes the fixation after mold closing, making it convenient for mold assembly and disassembly and part removal. The detachable fixing method of bolt connection can realize the quick mold closing and fixing and mold disassembly and separation of the lower mold body 3 and the upper mold body 4. Compared with the traditional snap or welding structure, the operation process is simpler, greatly shortening the mold assembly and disassembly time and improving the efficiency of part removal.

[0056] like Figure 2As shown, the lower mold heat insulation plate 2 is bolted to the bottom of the lower mold body 3, providing heat insulation for the lower mold body 3. The upper mold heat insulation plate 5 is bolted to the top of the upper mold body 4, providing heat insulation for the upper mold body 4. Both the lower mold heat insulation plate 2 and the upper mold heat insulation plate 5 are made of high-temperature resistant heat insulation material, which can effectively reduce heat loss during the mold heating and curing process, improve the heat insulation effect of the mold, and utilize the thermal barrier properties of the high-temperature resistant heat insulation material to reduce the heat transfer from the lower mold body 3 and the upper mold body 4 to the external environment during the heating and curing process, so that the temperature inside the mold cavity remains stable, avoiding uneven cavity temperature caused by heat loss, while improving thermal energy utilization and reducing heating energy consumption.

[0057] like Figure 2 As shown, there are two quick-connect air-blowing connectors A6, which are symmetrically bolted to the top of the upper mold body 4 about the middle position. The quick-connect air-blowing connectors A6 are connected to an air compressor and are used to introduce positive pressure gas into the air-blowing inner bag inside the mold cavity. There are two quick-connect air-blowing connectors B7, which are symmetrically bolted to the top of the upper mold body 4 about the middle position. The quick-connect air-blowing connectors B7 are connected to a pressure gauge and are used to monitor the pressure value inside the air-blowing inner bag. There are two quick-connect vacuum connectors 8, which are symmetrically installed near both ends of the upper mold body 4. The quick-connect vacuum connectors 8 are connected to a negative pressure machine and are used to perform vacuuming operations on the cavity of the mold cavity.

[0058] Four support blocks 9 are provided and installed at the four corners of the top of the upper mold body 4. They provide support and limit the mold during the mold closing and forming process. The support blocks 9 are made of high-strength hard alloy material and their height is greater than the thickness of the upper mold heat insulation plate 5. The high-strength hard alloy material of the support blocks 9 can provide stable support force and prevent the upper mold body 4 from deforming due to force during the mold closing and pressing process. In addition, the height of the support blocks 9 is greater than the thickness of the upper mold heat insulation plate 5, which can form a gap between the upper mold heat insulation plate 5 and the placement surface, preventing heat loss caused by direct contact between the heat insulation plate and the placement surface, while ensuring the stability of the mold placement.

[0059] like Figure 2 As shown, the lifting rods 10 are installed at both ends of the lower mold body 3 and the upper mold body 4, respectively, to facilitate the handling, disassembly, and closing of the mold. The lifting rods 10 are welded or bolted to the lower mold body 3 and the upper mold body 4. The outer wall of the lifting rods 10 is provided with anti-slip texture. The welding or bolting connection ensures the structural strength of the connection between the lifting rods 10 and the mold body, meeting the force requirements during the handling and disassembly of the mold. The anti-slip texture on the outer wall of the lifting rods 10 can increase the friction between the operator's hand and the rod, preventing slippage during handling and improving the safety of mold operation.

[0060] like Figure 2As shown, the steam quick-connect fitting 11 is connected to the middle and near the end face of the side wall of the lower mold body 3 and the upper mold body 4, respectively. The steam quick-connect fitting 11 can be selectively connected to the steam mold temperature controller and the cooling water supply device to realize the heating and cooling of the mold. The steam quick-connect fitting 11 has a quick-connect structure, which can realize the quick docking and disassembly with the steam mold temperature controller and the cooling water supply device, improving the operation efficiency of mold heating and cooling. The quick-connect structure of the steam quick-connect fitting 11 can realize tool-free quick docking and disassembly with the steam mold temperature controller and the cooling water supply device, replacing the traditional threaded connection method, greatly shortening the equipment docking time of the mold heating and cooling process, while ensuring the sealing of the connection to avoid steam or cooling water leakage.

[0061] like Figures 1-4 As shown, a method for forming a rapid prototyping mold structure for a fiber composite car rear wing includes the following steps:

[0062] S1. Mold preheating: Connect the steam quick-connect connector 11 to the steam mold temperature controller, and introduce preheated steam into the mold through the steam quick-connect connector 11 to preheat the lower mold body 3 and the upper mold body 4 to 40°C and keep them at that temperature for 30 minutes.

[0063] S2. Prepreg laying: After preheating, carbon fiber prepreg is laid on the inner wall of the cavity of the lower mold body 3, and carbon fiber prepreg is laid on the inner wall of the cavity of the upper mold body 4 to ensure that the prepreg is laid flat, without wrinkles or hollows; after laying, a high-temperature resistant air-blowing inner bag that is compatible with the inner cavity structure of the rear wing is laid inside the cavity of the lower mold body 3, and the air-blowing inner bag is connected to the air-blowing quick connector A6 and air-blowing quick connector B7.

[0064] S3. Mold closing: The upper mold body 4 and the lower mold body 3 are precisely closed and fixedly connected by bolts to form a complete sealed cavity. During the mold closing process, the mold closing accuracy is ensured by the limiting boss structure to prevent the pressure plate from shifting.

[0065] S4. Pressurization and Vacuuming: Connect the air blowing quick-connect connector A6 to the air compressor, and introduce positive pressure gas into the inner bag through the air blowing quick-connect connector A6 to pressurize the pressure inside the bag to 0.9MPa and maintain this pressure value. At the same time, monitor the pressure inside the bag in real time through the pressure gauge connected to the air blowing quick-connect connector B7. Connect the vacuuming quick-connect connector 8 to the negative pressure machine to perform vacuuming operation on the cavity of the mold, and pump the negative pressure inside the cavity to above 0.08MPa and maintain this negative pressure value.

[0066] S5. Heating and curing: Maintain the pressure and vacuum state of the mold, connect the steam quick connector 11 to the steam mold temperature controller continuously, introduce high temperature steam into the mold, rapidly raise the overall temperature of the mold to 145°C, and continue heating and curing at this temperature for 2 hours to fully cure and shape the carbon fiber prepreg.

[0067] S6. Mold cooling: After heating and curing, disconnect the steam quick connector 11 from the steam mold temperature controller and connect it to the cooling water supply device. Then, introduce cooling water into the mold through the steam quick connector 11 and use water cooling to reduce the overall temperature of the mold to below 60°C.

[0068] S7. Demolding and Part Removal: After the mold has cooled down, remove the fixing bolts between the lower mold body 3 and the upper mold body 4, separate the upper mold body 4 and the lower mold body 3, and then take out the molded fiber composite material car rear wing part from the cavity to complete the entire molding operation.

[0069] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A rapid prototyping mold structure for a fiber composite material car rear spoiler, characterized in that, It includes a lower mold body (3) and an upper mold body (4), wherein the lower mold body (3) and the upper mold body (4) are molded together to form a cavity that is adapted to the rear wing (1) of the vehicle, for the purpose of forming the rear wing of the vehicle; The lower mold heat insulation plate (2) is bolted to the bottom of the lower mold body (3) and plays a role in heat insulation of the lower mold body (3); The upper mold heat insulation plate (5) is bolted to the top of the upper mold body (4) and plays a role in heat insulation of the upper mold body (4); The quick-connect air-blowing connector A (6) is provided in two and is symmetrically bolted to the top of the upper mold body (4) about the middle position. The quick-connect air-blowing connector A (6) is connected to an air compressor and is used to introduce positive pressure gas into the air-blowing inner bag inside the mold cavity. The quick-connector B (7) is provided in two parts and is symmetrically bolted to the top of the upper mold body (4) about the middle position. The quick-connector B (7) is connected to a pressure gauge to monitor the pressure value inside the air-blowing inner bag. The vacuum quick-connector (8) is provided in two and is symmetrically installed on the upper mold body (4) near both ends. The vacuum quick-connector (8) is connected to the negative pressure machine and is used to perform vacuuming operation on the cavity of the mold cavity. Support blocks (9), there are four support blocks (9), which are respectively installed at the four corners of the top of the upper mold body (4) to support and limit the mold closing and forming process; The mold lifting rod (10) is installed at both ends of the lower mold body (3) and the upper mold body (4) respectively, which facilitates the handling, disassembly and assembly and mold closing operations of the mold; Steam quick-connector (11) is connected to the middle part of the side wall and the end face of the lower mold body (3) and the upper mold body (4) respectively. The steam quick-connector (11) can be selectively connected to a steam mold temperature controller and a cooling water supply device to realize the heating and cooling of the mold.

2. The rapid prototyping mold structure for a fiber composite material car rear wing according to claim 1, characterized in that, The surfaces of the lower mold body (3) and the upper mold body (4) are designed according to the outer side of the car rear wing product to ensure that the outer contour of the car rear wing is consistent with the design size after molding.

3. The rapid prototyping mold structure for a fiber composite material car rear spoiler according to claim 2, characterized in that, An air-blowing inner bag is fitted inside the cavity of the lower mold body (3). The structure of the air-blowing inner bag is consistent with the inner cavity structure of the rear wing (1). The air-blowing inner bag is connected to the air-blowing quick-connect connector A (6) and the air-blowing quick-connect connector B (7).

4. The rapid prototyping mold structure for a fiber composite material car rear spoiler according to claim 3, characterized in that, The lower mold body (3) and the upper mold body (4) are provided with a limiting boss structure at the mold closing point. The limiting boss structure is used to prevent the pressure plate from shifting during the mold pressing process and to ensure the flatness of the inner surface of the molded part.

5. The rapid prototyping mold structure for a fiber composite material car rear spoiler according to claim 4, characterized in that, The lower mold body (3) and the upper mold body (4) are detachably connected by bolts to complete the fixing after mold closing, so as to allow for mold assembly and disassembly and part removal.

6. The rapid prototyping mold structure for a fiber composite material car rear spoiler according to claim 1, characterized in that, The lower mold heat insulation plate (2) and the upper mold heat insulation plate (5) are both made of high temperature heat insulation material, which can effectively reduce heat loss during the heating and curing process of the mold and improve the heat preservation effect of the mold.

7. The rapid prototyping mold structure for a fiber composite material car rear spoiler according to claim 1, characterized in that, The support block (9) is made of high-strength hard alloy material, and its height is greater than the thickness of the upper mold heat insulation plate (5).

8. The rapid prototyping mold structure for a fiber composite material car rear spoiler according to claim 1, characterized in that, The lifting rod (10) is welded or bolted to the lower mold body (3) and the upper mold body (4), and the outer wall of the lifting rod (10) is provided with anti-slip texture.

9. The rapid prototyping mold structure for a fiber composite material car rear spoiler according to claim 1, characterized in that, The steam quick-connect connector (11) is a quick-connect structure that can be quickly connected and disconnected from the steam mold temperature controller and cooling water supply device, thereby improving the efficiency of mold heating and cooling operations.

10. A molding method for a rapid prototyping mold structure of a fiber composite material vehicle rear spoiler according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Mold preheating: Connect the steam quick-connect connector (11) to the steam mold temperature controller, and introduce preheated steam into the mold through the steam quick-connect connector (11) to preheat the lower mold body (3) and the upper mold body (4) to 40°C and keep it warm for 30 minutes. S2, Prepreg laying: After preheating, carbon fiber prepreg is laid on the inner wall of the cavity of the lower mold body (3), and carbon fiber prepreg is laid on the inner wall of the cavity of the upper mold body (4) to ensure that the prepreg is laid flat, without wrinkles or hollows; after laying, a high temperature resistant air-blowing inner bag that is compatible with the inner cavity structure of the rear wing is laid inside the cavity of the lower mold body (3), and the air-blowing inner bag is connected to the air-blowing quick connector A (6) and the air-blowing quick connector B (7); S3, Mold closing: The upper mold body (4) and the lower mold body (3) are precisely closed and fixedly connected by bolts to form a complete sealed cavity. During the mold closing process, the mold closing accuracy is ensured by the limiting boss structure to prevent the pressure plate from shifting. S4. Pressurization and vacuuming: Connect the air blowing quick connector A (6) to the air compressor, and introduce positive pressure gas into the air blowing inner bag through the air blowing quick connector A (6) to pressurize the pressure inside the bag to 0.9MPa and maintain this pressure value. At the same time, monitor the pressure inside the bag in real time through the pressure gauge connected to the air blowing quick connector B (7); connect the vacuuming quick connector (8) to the negative pressure machine to perform vacuuming operation on the cavity of the mold, and pump the negative pressure value inside the cavity to above 0.08MPa and maintain this negative pressure value. S5. Heating and curing: Keep the mold under pressure and vacuum, connect the steam quick connector (11) to the steam mold temperature controller, introduce high temperature steam into the mold, rapidly raise the overall temperature of the mold to 145°C, and continue heating and curing at this temperature for 2 hours to fully cure and shape the carbon fiber prepreg. S6. Mold cooling: After heating and curing, disconnect the steam quick connector (11) from the steam mold temperature controller and connect it to the cooling water supply device. Cooling water is introduced into the mold through the steam quick connector (11) and the overall temperature of the mold is reduced to below 60°C by water cooling. S7. Demolding and part removal: After the mold has cooled down, remove the fixing bolts between the lower mold body (3) and the upper mold body (4), separate the upper mold body (4) and the lower mold body (3), and then take out the molded fiber composite material car rear wing part from the cavity to complete the entire molding operation.

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