Preparation process of carbon fiber automobile spoiler

Abstract

The invention provides a preparation process of a carbon fiber automobile spoiler, and relates to the technical field of automobile parts. According to the invention, the following modules are mainly improved: the die design is improved, and an upper and lower half die in the original process is changed into a three-piece combined die; screening a foaming raw material, namely an epoxy foaming raw material, making the epoxy foaming raw material into paste, and rolling the paste into a sheet with the thickness of 0.5 mm for later use; when in use, the carbon fiber material is cut into strips and is uniformly filled in a mold cavity enclosed by the carbon fiber material; the carbon fiber material is changed into a three-block combination according to the design structure of the mold, and the carbon fiber material and the package material are bonded together through the pressure of the mold and the viscous force of the resin on the carbon fiber to form a complete product; according to the invention, the production links can be reduced, two steps are changed into one step, the working hours are reduced by 50%, the energy consumption is saved by more than 30%, and the method can be applied to other energy-saving and weight-reducing products in the same way.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile accessories, and in particular to a preparation process of a carbon fiber automobile tail wing. Background Art

[0002] The process of airbag inflation compression molding is usually called blow molding. First, the airbag is prefabricated with an inflation port. During molding, compressed air is filled into the airbag through the inflation port to expand the airbag, allowing the carbon fiber material covering the airbag to stick to the mold and be cured by heat. This process first requires preparing a form-fitting airbag, and then folding the airbag appropriately and stuffing it into the mold with the carbon fiber attached, because the airbag needs to be appropriately large so that it can fully expand after inflation to support the carbon fiber. This process has an extra step in making the airbag, which increases cost and labor. At the same time, the airbag is prone to rupture when heated, causing the product to be scrapped, and the interface of the airbag is also prone to leakage, resulting in product defectiveness. According to statistics, the defective rate of the airbag inflation method is about 20%.

[0003] The carbon fiber foam core compression molding method first uses foaming raw materials and foaming molds to make the core material, or buys foamed foam boards and carves them out with an engraving machine; this increases the process steps, and the process cost and labor cost increase significantly; and the foam core is easy to break, and it is easy to collapse when heated during the secondary molding process, resulting in depressions on the product surface. If PMI or PET foam raw materials are used, although they are heat-resistant, they are very expensive. Under the influence of moisture, the foam core will also collapse when heated, resulting in depressions on the product surface and poor quality, especially in the south; the defective rate also reaches between 20% and 30%.

[0004] For related patent documents, please refer to: CN114603876A. Summary of the Invention

[0005] In response to the above problems, the present invention provides a process for preparing a carbon fiber automobile rear wing. The invention realizes a one-step preparation of a carbon fiber automobile rear wing; simplifies the production process, improves efficiency, and reduces energy consumption; increases the yield to over 95%; reduces energy consumption by 30%, and reduces carbon emissions.

[0006] In order to solve the above problems, the technical solution adopted by the present invention is: a preparation process of a carbon fiber automobile tail wing, using a carbon fiber automobile tail wing shaping mold, the carbon fiber automobile tail wing shaping mold includes a shaping mold 1, a shaping mold 3 and a shaping mold 2 distributed in sequence from bottom to top, the shaping mold 1 is provided with a shaping groove 1 at the upper end, the shaping mold 3 is provided with a shaping protrusion on the arc-shaped outer side, and the shaping mold 2 is provided with a shaping groove 2 at the lower end, and the shaping groove 1, the shaping protrusion and the shaping groove 2 together form a shaping mold cavity; comprising the following steps: S1, preparing a sheet of carbon fiber raw material Material and sheet-like foaming raw material, wherein the length of the foaming raw material is less than the length of the carbon fiber raw material; S2, laying the sheet-like carbon fiber raw material on the corresponding surfaces of the shaping mold one, the shaping mold two, and the shaping mold three; laying the sheet-like foaming raw material on the surface of the carbon fiber raw material of the shaping mold one in a layered, staggered and bite-like manner. After the sheet-like foaming raw material is laid, it is folded along the arc length direction of the carbon fiber raw material to cover and limit the inner foaming raw material; S3, aligning and pressing the shaping mold one, the shaping mold two and the shaping mold three and fixing them by bolts, and then performing hot pressing molding after fixing them.

[0007] Preferably, the foaming raw material is epoxy foaming raw material, and the foaming raw material is rolled into 0.5 mm sheets for standby use, and cut into strips when used.

[0008] Preferably, before the foaming raw materials are attached, the shaping mold 3 is first installed at a predetermined position on the inner side of the upper end of the shaping mold 1, and the shaping mold 1 and the shaping mold 3 are locked and positioned using bolts.

[0009] Preferably, carbon fiber strips are inserted to fill the gap at the position where the materials of the shaping mold 1 and the shaping mold 3 contact each other, and reinforcing materials are affixed to the position where the materials of the shaping mold 1 and the shaping mold 3 contact each other.

[0010] Preferably, the foaming material is superimposed and adhered to the surface of the carbon fiber raw material along the length direction of the carbon fiber raw material. After the foaming material is placed, the carbon fiber raw material on the shaping mold is then folded. After the carbon fiber raw material is folded, it is shaped using a refrigerant.

[0011] Preferably, the foamed sheets are laid in multiple layers, the foamed sheets are staggered with each other, and the gaps between adjacent sheets of different layers are located in different vertical planes.

[0012] Preferably, the sheet foam is laid according to the following steps: first, the bottom first layer is laid using the sheet foam, the first piece of foam sheet is folded in half, and the upper and lower parts of the foam sheet are controlled to be inconsistent in length after the folding, and the longer side of the folded foam sheet is placed on the side close to the carbon fiber raw material, and then the remaining unfilled positions are supplemented with foam sheets.

[0013] Preferably, when the length of the distal foam sheet is greater than the remaining gap, the foam sheet is also folded or trimmed.

[0014] Preferably, after the carbon fiber raw material is folded, the processed shaping mold 2 is covered on the upper end of the shaping mold 1 and locked in place by bolts.

[0015] Preferably, during the process of covering the shaping mold 2 with the shaping mold 1, the positioning protrusions on both sides are used for initial positioning. During the positioning process, the shaping mold 2 is first controlled to tilt as a whole at a predetermined angle, and the positioning protrusions are first controlled to contact the positioning grooves to achieve positioning of the lateral degrees of freedom of the shaping mold 1 and the shaping mold 2. Subsequently, the shaping mold 2 is controlled to gradually deflect to a horizontal state to achieve positioning of the longitudinal and vertical degrees of freedom.

[0016] The beneficial effects of the present invention are: Compared with the existing technology, by improving the process and mold, there is no need to use an airbag structure. By placing a sheet foaming raw material in a carbon fiber raw material for hot pressing, the foaming raw material expands after hot pressing to support the carbon fiber raw material from the inside, and finally forming a finished carbon fiber tail wing. By using a sheet foaming raw material, it is easy to process and manufacture, and can adapt to carbon fiber tail wing of different shapes, with strong adaptability. By improving the mold structure and folding the inner foaming raw material along the arc length direction of the carbon fiber raw material to cover and limit the stability of the material during the processing, it also avoids moisture entry to the greatest extent. The present invention simplifies the production process, improves efficiency, and reduces energy consumption; the yield is increased to more than 95%; energy consumption is reduced by 30%, and carbon emissions are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the carbon fiber tail wing of the present invention.

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the carbon fiber automobile tail wing shaping mold of the present invention.

[0019] Figure 3 For the present invention Figure 2 Schematic diagram of the rear view structure.

[0020] Figure 4 For the present invention Figure 2 Schematic diagram of the side structure.

[0021] Figure 5 For the present invention Figure 2 A is an enlarged structural diagram of FIG.

[0022] Figure 6 This is a schematic diagram of the exploded structure of the carbon fiber automobile tail wing shaping mold of the present invention.

[0023] Figure 7 This is a schematic diagram of the three-dimensional structure of the second shaping mold of the present invention.

[0024] Figure 8 For the present invention Figure 7 Schematic diagram of the upward-looking structure.

[0025] Figure 9 For the present invention Figure 7 Schematic diagram of the main structure.

[0026] Figure 10 It is a schematic diagram of the three-dimensional structure of the shaping mold three of the present invention.

[0027] Figure 11 For the present invention Figure 10 Schematic diagram of the main structure.

[0028] Figure 12 It is a schematic diagram of the three-dimensional structure of the shaping mold of the present invention.

[0029] Figure 13 For the present invention Figure 12 Schematic diagram of the top view structure.

[0030] Figure 14 It is a process flow chart of the present invention.

[0031] In the figure: 100, carbon fiber rear wing; 110, expansion part; 120, narrowing part; 200, shaping mold 1; 210, bearing member; 211, bearing block 1; 212, bearing block 2; 220, shaping groove 1; 230, positioning end; 300, shaping mold 2; 310, shaping groove 2; 320, big head end; 321, positioning protrusion; 330, flat strip; 400, shaping mold 3; 410, shaping protrusion; 411, sealing protrusion. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and examples.

[0033] Refer to the attached Figure 1 -Attached Figure 14A preparation process for a carbon fiber automobile rear wing uses a carbon fiber automobile rear wing shaping mold, and mainly carries out the following module improvements: improving the mold design, changing the upper and lower half molds of the original process into a three-petal combination mold; screening the foaming raw material - epoxy foaming raw material, and making the epoxy foaming raw material into a paste, and rolling it into 0.5mm sheets for standby use; cutting it into strips when using, and evenly filling it into the mold cavity surrounded by carbon fiber material; the carbon fiber material and the design structure of the mold are also changed into three pieces, and are bonded together by the pressure of the mold and the adhesion of the resin on the carbon fiber and the packaging material to form a complete product; the present invention can reduce the production links, change two steps into one, reduce 50% of the working hours, save more than 30% of energy consumption, and the same method can be used for other energy-saving and weight-reducing products.

[0034] The carbon fiber rear wing 100 is arc-shaped as a whole and is formed by hot pressing. The carbon fiber rear wing 100 includes a narrowing portion 120 protruding toward the outside and an expanding portion 110 concave inward. The upper and lower surfaces of the narrowing portion 120 gradually shrink and eventually form a conical apex on the outside. The expanding portion 110 is concave inside. The interior of the carbon fiber rear wing 100 is a hollow structure, and the vertical cross-section is similar to a V-shape.

[0035] The improved carbon fiber automobile rear wing shaping mold includes shaping mold 1 200, shaping mold 2 300 and shaping mold 3 400 sandwiched between shaping mold 1 200 and shaping mold 2 300 and located on the concave side. Shaping mold 1 200, shaping mold 2 300 and shaping mold 3 400 are all positioned and locked by bolts. Shaping mold 1 200, shaping mold 2 300 and shaping mold 3 400 together form a shaping mold cavity for accommodating the raw materials of the carbon fiber automobile rear wing. After hot pressing and forming, shaping mold 1 200, shaping mold 2 300 and shaping mold 3 400 are removed to finally obtain a shaped carbon fiber rear wing 100.

[0036] Specifically, the shaping mold 200 includes a supporting part 210, and the supporting part 210 includes a supporting block 1 211 and a supporting block 212. The supporting block 212 is integrally formed with the shaping mold 200. The supporting block 211 and the shaping mold 200 are detachably connected by bolts. The supporting block 1 211 and the supporting block 212 are both located horizontally on the concave side of the shaping mold 200, and can be located at the bottom to play a supporting role, thereby ensuring the stability of the shaping mold 200 as a whole during the processing; the supporting block 1 211 is determined according to the actual processing size and requirements. Adding the supporting block 1 211 can improve the stability of the overall structure during the processing, and reducing the supporting block 1 211 can reduce the volume and mass on both sides.

[0037] An inwardly concave shaping groove 220 is formed at the upper end of the shaping mold 200. The shaping groove 220 can constitute the bottom of the shaping mold cavity, supporting the carbon fiber raw material from the bottom to ensure stability during the hot pressing process; the inner wall and overall shape of the shaping groove 220 are determined according to the shape of the bottom of the carbon fiber rear wing 100.

[0038] The inner wall of the bottom of the second shaping mold 300 is concave to form a second shaping groove 310, which cooperates with the first shaping groove 220 to form the lower and upper surfaces of the shaping mold cavity; similarly, the inner wall and overall shape of the second shaping groove 310 are determined according to the shape of the top of the carbon fiber rear wing 100.

[0039] The shaping mold 2 300 includes large heads 320 on both sides and a smoothing strip 330 between the two large heads 320. The thickness of the bottom edge of the large heads 320 is greater than the thickness at the edge of the smoothing strip 330. Positioning ends 230 are formed on both sides of the shaping mold 1 200. The positioning ends 230 can cooperate with the corresponding large heads 320 to achieve preliminary positioning. At the same time, the thickness of the outer edge of the shaping mold 1 200 is larger and extends upward in the vertical direction. It can cooperate with the thinner smoothing strip 330 to form an interception protection structure on the outer side of the smoothing strip 330, which can better intercept and protect the raw material of the carbon fiber rear wing 100 during the positioning process.

[0040] Furthermore, a positioning protrusion 321 is formed at the lower end of the big head end 320, and a positioning groove adapted to the positioning protrusion 321 is formed at the upper end of the positioning end 230. In the mating state, the positioning protrusion 321 and the positioning groove can cooperate with each other to achieve initial positioning, further ensuring the stability of the clamping and positioning between the shaping mold 1 200 and the shaping mold 2 300.

[0041] The positioning protrusions 321 here are semi-cylindrical, and the length directions of the two positioning protrusions 321 are parallel to each other. During the positioning process, the shaping mold 2 300 can be controlled to have a smaller inclination angle. First, the positioning protrusions 321 are controlled to contact the positioning groove to realize the lateral freedom positioning of the shaping mold 1 200 and the shaping mold 2 300. Then, the shaping mold 2 300 is controlled to gradually deflect to a horizontal state to realize the longitudinal and vertical freedom positioning, and finally ensure the positioning and forming of the overall structure.

[0042] By controlling the initial tilt angle of the shaping mold 2 300 to be smaller, the carbon fiber tail wing 100 raw material attached to the outer side of the shaping mold 2 300 can be prevented from contacting the surface of the shaping mold 1 200 during the initial positioning process, thereby reducing the contact area and time between the shaping mold 2 300 and the shaping mold 1 200. After the lateral positioning is completed, the shaping mold 2 300 located above is controlled to deflect to a horizontal state, and gradually and quickly positioned and clamped.

[0043] During the clamping and positioning process, the shaping mold 200 is located at the bottom position, which plays a load-bearing and limiting state. In order to further ensure the stability of the shaping mold 200 during the clamping and positioning process, the support part 210 on the outside of the shaping mold 200 can be clamped and limited by clamps such as vise jaws to avoid displacement of the shaping mold 200 during the clamping and positioning process, further ensuring the stability of the overall structure during the clamping and positioning process and ensuring the quality of the finished product.

[0044] The shaping mold 3 400 located between the shaping mold 2 300 and the shaping mold 1 200 is located at the concave side, which can support and limit the expanded part 110 of the carbon fiber rear wing 100 from the middle position to ensure that the carbon fiber rear wing 100 has a certain thickness in the end.

[0045] Specifically, a shaping protrusion 410 is formed on the outside of the shaping mold 3 400 , and the shaping protrusion 410 can form the surface of the concave side of the shaping mold cavity. According to the requirements of the appearance of the carbon fiber tail wing 100 , the shaping mold 3 400 can be changed into a required shape.

[0046] The shaping mold 1 200 is located at the bottom to form a closed support structure, the shaping mold 2 300 is located at the top to form a closed support structure, and the shaping mold 3 400 is located on the concave side to form a closed support structure. It can support and limit the raw materials of the carbon fiber rear wing 100 from multiple positions to ensure the stability of the molding of the carbon fiber rear wing 100. By improving the structure of the mold, there is no need for built-in airbags for support, which simplifies the processing steps; and, after being fixed with bolts, the shaping mold 1 200, the shaping mold 2 300, and the shaping mold 3 400 can bite and press against each other, thereby avoiding the entry of moisture to the greatest extent during the hot pressing process, and avoiding the collapse of the foam core material during the heating process, thereby ensuring the quality of the finished carbon fiber rear wing 100.

[0047] Sealing protrusions 411 protruding outward are formed on both sides of the shaping protrusion 410. The sealing protrusions 411 can form a U-shaped abutment surface with the outer shaping mold 2 300 and the shaping mold 1 200. While shaping and positioning the shaping mold 1 200 and the shaping mold 2 300, the sealing gap can be extended by protruding outward, thereby further ensuring the quality of the extrusion molding of the carbon fiber rear wing 100, further preventing moisture from entering during the heating process, and ensuring the quality of the hot-pressed molded product.

[0048] A process for preparing a carbon fiber automobile rear wing comprises the following steps: Step 1: Prepare raw materials, screen the foaming raw materials - epoxy foaming raw materials, and make the epoxy foaming raw materials into a paste. Thickeners such as fumed silica and other materials can be added to the foaming material, and rolled into 0.5mm sheets for standby use. Cut into strips when used to facilitate uniform filling in the mold cavity surrounded by carbon fiber materials; the design structure of the carbon fiber material and the corresponding shaping mold is also changed to a three-piece combination, which is bonded together by the pressure of the mold and the adhesion of the resin on the carbon fiber and the foaming material to form a complete product; the carbon fiber raw materials and foaming raw materials are classified according to the shapes of shaping mold 1 200, shaping mold 2 300 and shaping mold 3 400, respectively, as A material, B material, and C material. The three raw materials with different shapes are placed in different storage containers and classified.

[0049] Step 2: respectively fit material A, material B, and material C with the corresponding shaping mold 1 200, shaping mold 2 300, and shaping mold 3 400. When laying, they need to be laid in the corresponding positions of the shaping grooves and shaping protrusions, and they cannot be misplaced; material A, material B, and material C are all carbon fiber raw materials, which are arc-shaped long sheets with certain soft properties. They are manually fitted to the corresponding positions along the length direction of the shaping grooves and shaping protrusions. After shaping, material A, material B, and material C are pressed against each other and fused together after hot pressing to form the three surfaces of the carbon fiber rear wing 100.

[0050] Step 3: After the above-mentioned raw materials are laid, the shaping mold 200 is placed horizontally on the surface of the processing platform. The shaping mold 3 400 is first installed at the predetermined position on the inner side of the upper end of the shaping mold 200, and the shaping mold 200 and the shaping mold 3 400 are locked and positioned using bolts; an upward positioning bolt is provided on the upper end of the shaping mold 200, and bolt holes are opened on the surface of the shaping mold 3 400 to pass through the upper and lower parts. A plurality of positioning bolts are tightened along the length direction of the arc of the shaping mold 200 and the shaping mold 3 400 for positioning; in the process of installing the positioning bolts, the bolts on both sides are first rotated to half the position for initial positioning, and then the positioning bolt in the middle position is inserted and tightened, and finally the positioning bolts on both sides are tightened and positioned to ensure that the overall structure is positioned accurately and stably; the positioning bolts can be positioned by knocking or locked by threading.

[0051] It should be noted that carbon fiber strips are inserted to fill the gap at the contact point between the materials of the molding die 1 200 and the molding die 3 400. The carbon fiber strips must be inserted to the bottom to avoid gaps or cracks that may cause abnormal cracks or other marks on the outside of the finished carbon fiber rear wing 100.

[0052] It is also necessary to stick reinforcing material on the contact position between the materials of the shaping mold 1 200 and the shaping mold 3 400. The reinforcing material is also carbon fiber cloth, and its main function is to increase the local strength of the joint, and foam strips are stuck on the surface of the shaping mold 1 200. The foam strips need to be evenly distributed and the number cannot be small; the foaming raw material is located on the inner side of the carbon fiber raw material. In the subsequent hot pressing process, the foaming raw material increases in volume due to heating, which can support the outer carbon fiber raw material from the inside. At the same time, the outer side of the carbon fiber raw material is rigidly limited under the common limitation of the shaping mold 1 200, the shaping mold 2 300, and the shaping mold 3 400, which can avoid the carbon fiber raw material from infinitely deforming outward, and finally it is shaped into a carbon fiber tail wing 100 with a solid V-shaped vertical cross-section.

[0053] The foaming raw material here is pre-made into a strip material, preferably a sheet with a thickness of 0.5 mm. The length is determined according to the length and curvature of the carbon fiber rear wing 100, and is usually less than 0.3 of the overall length of the carbon fiber rear wing 100. Its length dimension is smaller than the length of the carbon fiber rear wing 100. The foaming raw material is superimposed and bonded to the surface of the carbon fiber raw material along the length direction of the carbon fiber raw material. After the foaming raw material is placed, the carbon fiber raw material on the shaping mold 200 is then folded. The carbon fiber raw material is also in sheet form, and the size of the sheet carbon fiber raw material is reserved larger. The edge position is bent toward the inside of the mold. On the one hand, it is achieved to gather excess carbon fiber raw material and avoid abnormal edges of the carbon fiber raw material shape. At the same time, by designing the folding angle along the length direction of the arc of the carbon fiber raw material, the inner foaming raw material can be folded and bonded, and the inner foaming raw material is covered and limited to ensure that the foaming raw material is expanded in the center position. After the carbon fiber raw material is folded, it is shaped with a refrigerant to prevent the carbon fiber raw material from resetting under the action of its own stress, ensuring the accuracy and stability of the carbon fiber raw material and the foaming raw material after the folding angle is fixed.

[0054] It should be noted that the sheet-like foam material here is relatively stable when not heated and does not expand. During the hot pressing process, it expands from the inside to the outside due to the heat.

[0055] During the processing, it should be noted that the sheet foaming needs to be laid in multiple layers to meet the processing needs of carbon fiber rear wings 100 of different thicknesses; at the same time, the multiple layers of sheet foaming are staggered with each other, and the gaps between adjacent layers of sheets are located in different vertical planes. The multiple layers of sheet foaming materials are in a state of mutual interlocking, which can enhance the stability of the sheet during the laying process, and can also ensure that the gaps are located at different positions after heating, and the foaming materials at different positions are fully expanded for adaptive filling, ensuring the density of the interior of the foamed sheet.

[0056] The sheet foam is laid according to the following steps. After the carbon fiber raw material on the surface of the shaping mold 200 is laid, the first layer on the bottom is laid using sheet foam. The first foam sheet is folded in half, and the upper and lower parts of the foam sheet are controlled to be inconsistent in length after the fold. The longer side of the folded foam sheet is placed on the side close to the carbon fiber raw material. The remaining unfilled positions are then supplemented with foam sheets. When the length of the farthest foam sheet is greater than the remaining gap, the foam sheet is also folded or trimmed (the last foam sheet at the top is trimmed, and the rest are folded). In this way, multiple foam sheets can be laid quickly, and the connection gaps of foam sheets of different layers can be controlled to be in different vertical planes, thereby improving the laying efficiency of the foam sheets and avoiding the waste of foam sheets to the greatest extent.

[0057] The above-mentioned refrigerant can be a spray refrigerant, which will not produce too much impact when sprayed on the surface of the foaming raw material and the carbon fiber raw material, avoiding the introduction of new impurities, and can quickly shape the carbon fiber raw material and the foaming raw material within the processing time.

[0058] On the second shaping mold 300, stick the carbon fiber strip material along the outer edge of the unidirectional yarn. Make sure the position exposes the 3K yarn. Also pay attention to the direction and mark it clearly.

[0059] Step 4: Cover the processed shaping mold 2 300 onto the upper end of shaping mold 1 200, and lock it in place with bolts, and finally push it to the side of the press for pressurization. Press it in a heated environment, wait for the internal materials to bond into one, and wait for the overall structure to cool naturally. Finally, remove shaping mold 1 200, shaping mold 2 300 and shaping mold 3 400, take out the finished carbon fiber rear wing 100 inside, and complete the processing and manufacturing of a carbon fiber rear wing 100.

[0060] During the process of covering the shaping mold 2 300 with the shaping mold 1 200, the positioning protrusions 321 on both sides are used for initial positioning. During the positioning process, the shaping mold 2 300 is first controlled to tilt as a whole at a predetermined angle, and the positioning protrusions 321 are first controlled to contact the positioning grooves to achieve positioning of the lateral freedom of the shaping mold 1 200 and the shaping mold 2 300. Then, the shaping mold 2 300 is controlled to gradually deflect to a horizontal state to achieve positioning of the longitudinal and vertical degrees of freedom, and finally ensure the positioning and molding of the overall structure. The above method can reduce the contact impact of the sheet foaming raw materials stacked on the outside, ensure the stability of the multi-layer foaming raw materials, and ultimately improve the quality of the finished product.

[0061] By controlling the initial tilt angle of the shaping mold 2 300 to be smaller, the carbon fiber tail wing 100 raw material attached to the outer side of the shaping mold 2 300 can be prevented from contacting the surface of the shaping mold 1 200 during the initial positioning process, thereby reducing the contact area and time between the shaping mold 2 300 and the shaping mold 1 200. After the lateral positioning is completed, the shaping mold 2 300 located above is controlled to deflect to a horizontal state, and gradually and quickly positioned and clamped.

[0062] After the shaping mold 2 300 is closed, the carbon fiber raw materials on the surfaces of the shaping mold 1 200, the shaping mold 2 300 and the shaping mold 3 400 can be tightly pressed against the foaming material inside, and at the same time, the three pieces of carbon fiber raw materials are pressed against each other and fused together in the subsequent hot pressing process to form the three arc-shaped long sides of the carbon fiber tail wing; the foaming raw material on the inside expands after being heated, and during the hot pressing process, the inside of the carbon fiber tail wing is squeezed by the foaming raw material and fits against the inner walls of the shaping mold 1 200, the shaping mold 2 300 and the shaping mold 3 400. At the same time, the shaping mold 1 200, the shaping mold 2 300 and the shaping mold 3 400 are in a relatively unchanged position under the fixation of bolts, and the carbon fiber raw materials are limited from the outside. After a certain period of hot pressing and heat preservation, the foaming material is fully expanded, and the carbon fiber raw materials on the outside are pressed against and fused, finally forming a carbon fiber tail 100 with a smooth surface and a full inside.

[0063] The foaming material is not reversible after being heated, and is in a normal expanded state, playing an effective supporting role on the inside, thereby ensuring the stability of the carbon fiber rear wing 100 after molding and cooling.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A process for preparing a carbon fiber automobile rear wing, using a carbon fiber automobile rear wing shaping mold, characterized in that: The carbon fiber automobile tail wing shaping mold comprises a shaping mold 1 (200), a shaping mold 3 (400) and a shaping mold 2 (300) which are sequentially distributed from bottom to top, wherein the shaping mold 1 (200) is provided with a shaping groove 1 (220) at the upper end, the shaping mold 3 (400) is provided with a shaping protrusion (410) on the arc-shaped outer side, and the shaping mold 2 (300) is provided with a shaping groove 2 (310) at the lower end, and the shaping groove 1 (220), the shaping protrusion (410) and the shaping groove 2 (310) together form a shaping mold cavity; and the steps include: S1. Preparing a sheet of carbon fiber raw material and a sheet of foaming raw material, wherein the length of the foaming raw material is shorter than the length of the carbon fiber raw material; S2, laying the sheet-like carbon fiber raw material on the corresponding surfaces of the shaping mold 1 (200), the shaping mold 2 (300), and the shaping mold 3 (400); laying the sheet-like foaming raw material on the surface of the carbon fiber raw material of the shaping mold 1 (200) in a layered, staggered and interlocking manner; after the sheet-like foaming raw material is laid, folding the carbon fiber raw material along the arc length direction to cover and limit the inner foaming raw material; S3, aligning and pressing the shaping mold 1 (200), the shaping mold 2 (300) and the shaping mold 3 (400) and fixing them by bolts, and then performing hot pressing molding after the fixing.

2. The process for preparing a carbon fiber automobile rear wing according to claim 1, characterized in that: The foaming material is epoxy foaming material, and the foaming material is rolled into 0.5 mm sheets for standby use, and cut into strips when used.

3. The process for preparing a carbon fiber automobile rear wing according to claim 1, characterized in that: Before the foaming raw materials are bonded, the shaping mold 3 (400) is first installed at a predetermined position on the inner side of the upper end of the shaping mold 1 (200), and the shaping mold 1 (200) and the shaping mold 3 (400) are locked and positioned using bolts.

4. The process for preparing a carbon fiber automobile rear wing according to claim 3, characterized in that: At the position where the materials of the shaping mold 1 (200) and the shaping mold 3 (400) are in contact, a carbon fiber strip is inserted to fill the gap, and a reinforcing material is attached to the position where the materials of the shaping mold 1 (200) and the shaping mold 3 (400) are in contact.

5. The process for preparing a carbon fiber automobile rear wing according to claim 1, characterized in that: The foaming material is stacked and attached to the surface of the carbon fiber raw material along the length direction of the carbon fiber raw material. After the foaming material is placed, the carbon fiber raw material on the shaping mold 1 (200) is then folded. After the folding of the carbon fiber raw material is completed, it is shaped using a refrigerant.

6. The process for preparing a carbon fiber automobile rear wing according to claim 1, characterized in that: The foamed sheets are laid in multiple layers, the foamed sheets are staggered with each other, and the gaps between adjacent sheets of different layers are located in different vertical planes.

7. The process for preparing a carbon fiber automobile rear wing according to claim 1, characterized in that: The sheet foam is laid according to the following steps: first, the bottom first layer is laid with sheet foam, the first piece of foam sheet is folded in half, and the upper and lower parts of the foam sheet are controlled to be inconsistent in length after folding, and the longer side of the folded foam sheet is placed on the side close to the carbon fiber raw material, and then the remaining unfilled positions are supplemented with foam sheets.

8. The process for preparing a carbon fiber automobile rear wing according to claim 7, characterized in that: When the length of the distal foam sheet is greater than the remaining gap, the foam sheet is also folded or trimmed.

9. The process for preparing a carbon fiber automobile rear wing according to claim 1, characterized in that: After the carbon fiber raw material is folded, the processed shaping mold 2 (300) is covered on the upper end of the shaping mold 1 (200) and locked in place by bolts.

10. The process for preparing a carbon fiber automobile rear wing according to claim 9, characterized in that: During the process of covering the shaping mold 2 (300) with the shaping mold 1 (200), the positioning protrusions (321) on both sides are used for initial positioning. During the positioning process, the shaping mold 2 (300) is first controlled to tilt as a whole at a predetermined angle, and the positioning protrusions (321) are first controlled to contact with the positioning grooves to achieve positioning of the lateral freedom of the shaping mold 1 (200) and the shaping mold 2 (300). Subsequently, the shaping mold 2 (300) is controlled to gradually deflect to a horizontal state to achieve positioning of the longitudinal and vertical freedoms.

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