Forming method of carbon fiber cushion made of bio-based epoxy resin

Abstract

The invention discloses a method for forming a carbon fiber cushion made of bio-based epoxy resin. The method comprises the manufacturing steps of carbon fiber material processing, wherein the manufacturing steps include material preparation, design, yarn cutting, layer laying, yarn supplementing, yarn winding, pre-forming, hot-pressing die forming, deburring, polishing, cleaning, paint spraying, baking, assembling, appearance inspection, finished product testing and the like, and the manufacturing steps include the steps of material preparation, yarn cutting, layer laying, yarn supplementing, yarn winding, pre-forming, hot-pressing die forming, deburring, polishing, cleaning, paint spraying, baking, assembling, appearance inspection, finished product testing and the like. According to the invention, the bio-based epoxy resin is adopted to replace traditional petroleum-based epoxy resin, so that consumption of non-renewable petroleum-based resources can be reduced, environmental protection and recycling of carbon fibers can be realized, and sustainable renewable resources can be reasonably used. A novel cushion manufacturing process is adopted, the cushion can conform to human mechanics, a rider can feel more comfortable and save more labor, good scratch resistance and abrasion resistance are achieved, the service life is prolonged, and the percent of pass of products in the production process and the stability of product quality can be guaranteed through the machining and forming process.

Description

Technical Field

[0001] The invention relates to the technical field of seat cushion molding, and in particular to a carbon fiber seat cushion molding method made of bio-based epoxy resin. Background Art

[0002] With the rapid development of modern society, cycling has gradually become popular and is deeply loved by the public. The functional requirements for bicycles are also increasing. Not only do they want to be lightweight and high-strength, but they also need to be beautiful, comfortable, and shock-absorbing. Before this, the materials of bicycle seats were mainly aluminum alloys or plastics. In order to achieve the characteristics of light weight and high strength of bicycle seats, carbon fiber epoxy resin composite materials were used. However, the epoxy resins commonly used in the market are all processed from non-renewable petroleum bases, and the consumption of petroleum resources is an energy shortage problem that concerns the world. With the continuous consumption of petroleum resources, it will have a great impact on the development of human society in the future. In order to meet the development goals of "carbon neutrality" and the concept of sustainable development, it is particularly important to reduce the consumption of non-renewable resources and develop and utilize renewable resources for the sustainable development of the national economy and the sustainable development of the materials field.

[0003] Therefore, it is necessary to study a new technical solution to solve the above problems. Summary of the invention

[0004] In view of this, the present invention aims to provide a

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A method for forming a carbon fiber seat cushion made of bio-based epoxy resin comprises the following steps:

[0007] S1: Material preparation: compounding bio-based epoxy resin on carbon fiber sheets, processing them into carbon fiber prepreg through high temperature and high pressure technology, and rolling the carbon fiber prepreg into rolls for subsequent use;

[0008] S2: Software design: Design the size and style of the seat plate and bow frame through 3D software, and analyze the required size and specific quantity of carbon fiber prepreg according to the design drawings of the seat plate and bow frame;

[0009] S3: Yarn cutting: the rolled carbon fiber prepreg is cut by cutting equipment and cut according to the actual required quantity and size;

[0010] S4: Laying, laying the carbon fiber prepreg sheets cut to size in sequence, so that the thickness of the laid carbon fiber prepreg can reach the total thickness required by the drawing and meet the weight, strength and stiffness required by the product;

[0011] S5: Yarn filling: judge whether there is any problem based on the appearance of the product, and perform yarn filling and reinforcement according to the actual situation, and add carbon yarn to the problematic parts for reinforcement;

[0012] S6: Winding, by preforming the carbon fiber prepreg layer into the shape of the bow frame and performing a winding operation on it, the carbon fiber prepreg is arranged in a gradual manner so that it can be rolled into a solid rod in the initial stage of winding, so that the axis of the solid rod made of carbon fiber material has compactness;

[0013] S7: preforming, folding the seat cushion and bow frame according to the laying order;

[0014] Seat cushion preforming: The carbon fiber prepregs are laminated in the order in which they are placed, and the air in each layer is squeezed out to make each layer fit better;

[0015] Bow frame preforming: fold the solid rod into two sections, overlap the end points of the two sections, and cover the overlapped part with filling carbon yarn to improve the connection stability, and add U-shaped carbon yarn at the folded part of the solid rod to improve the connection performance;

[0016] S8: hot pressing mold forming, placing the preformed bow frame and seat cushion plate into the hot pressing mold, and then hot pressing the hot pressing mold through a hot press machine to further expel the air between each layer and enhance the adhesion between each layer;

[0017] S9: demoulding, taking out the heat-pressed bow frame and seat cushion plate;

[0018] S10: Deburring: Use deburring equipment to grind the edges of the bow frame and seat cushion to remove excess carbon yarn and epoxy resin extruded to improve the aesthetics of the product;

[0019] S11: drilling holes, through drilling holes in the punching area above the cushion plate, the position and size of the holes are punched according to the installation position of the bow frame, so as to facilitate the subsequent assembly of the cushion plate and the bow frame together;

[0020] S12: Wet grinding, by grinding the outside of the product, effectively remove the release agent attached to its outer surface, and also grind the outer surface of the product to make it rough, increasing the adhesion of paint and fuel;

[0021] S13: Surface cleaning: by cleaning the outside of the product, dust and impurities attached to the surface are effectively removed to keep the outer surface of the product clean and tidy;

[0022] S14: Primer spraying, by spraying the outer surface of the seat plate and bow frame with a transparent primer;

[0023] S15: Appearance inspection: After spraying the transparent primer, inspect the product to find any holes in time and repair them;

[0024] S16: Baking: putting the painted bow frame and seat cushion into the oven for baking, and drying the paint on the outer surface of the product;

[0025] S17: Wet sanding, rough sanding of the product sprayed with primer after drying;

[0026] S18: Repair: If cracks or gaps are found on the surface of the product, they need to be repaired with putty glue. The repair should be done in small amounts and multiple times.

[0027] S19: Re-baking: After the repair is completed, the product needs to be baked for the second time so that the repaired putty can dry and bond with the original product;

[0028] S20: Grinding with water sandpaper, polishing the seat plate and bow frame, effectively removing the burrs and burrs, and effectively grinding the bends and turning points to make the overall outer surface of the product smooth and flat;

[0029] S21: Assembling, by applying adhesive to the punched positioning areas of the seat cushion plate and the bow frame, so that the bow frame and the seat cushion plate can be firmly bonded and fixed together by the adhesive;

[0030] S22: Spraying topcoat, by spraying topcoat on the surface of the product, it can protect the surface of the product, resist wear and scratch, and the topcoat is sprayed lightly and evenly;

[0031] S23: Re-baking: by baking the product after spraying the topcoat, the paint can be firmly attached to the surface of the product and not easy to fall off;

[0032] S24: Finished product inspection, through the appearance quality inspection of the finished products, select the defective products that do not meet the product quality requirements;

[0033] S25: Finished product testing, using the three-point bending test method to test the assembled seat cushion to see if the product's bending resistance and rigidity meet quality requirements.

[0034] As a preferred embodiment, the material selected from the bio-based epoxy resin is bio-based lignin epoxy resin, vegetable oil-based epoxy resin, rosin-based epoxy resin, bio-phenol-based epoxy resin or sugar-based epoxy resin. By immersing the carbon fiber sheet into the bio-based epoxy resin, the interior of the carbon fiber sheet can be fully soaked and filled with the bio-based epoxy resin, thereby enhancing the connection strength and toughness between the carbon fiber materials.

[0035] As a preferred solution, the cutting equipment used in the S3 yarn cutting includes a cutting machine or a manual cutter, which cuts a whole piece or a whole roll of carbon fiber prepreg into several small pieces of carbon fiber prepreg by cutting the whole piece of carbon fiber prepreg into several small pieces of carbon fiber prepreg.

[0036] As a preferred solution, in the ply laying in S4, a plurality of pieces of cut and classified small carbon fiber prepregs are stacked in sequence, wherein in the ply laying of the carbon fiber prepregs of the seat cushion plate, the carbon fiber prepregs are stacked in the directions of 0°, 45°, -45°, 0°, 90°, 0°, 30°, -30°, 45°, -45°, 90°, and 0° from bottom to top;

[0037] In the laying of the bow frame, the carbon fiber prepreg is arranged and stacked in layers from bottom to top in the order of 90°, 30°, -30°, 90°, and 90°.

[0038] As a preferred solution, in the carbon fiber prepreg ply arrangement of the seat cushion plate, reinforcement patches are further arranged between 0° and 90°, and between 90° and 0°.

[0039] As a preferred solution, in the preforming of S7, the protective blue film and release paper of the sequentially stacked carbon fiber prepregs are torn off, so that the carbon fiber prepregs and the reinforcement patches can be placed in sequence, and the adjacent layers can be closely attached together by manual arrangement, and the air between each layer can be discharged outward;

[0040] U-shaped carbon yarns are arranged at the connection and folding parts of the solid rod, so that the U-shaped carbon yarns can strengthen the connection and folding parts of the solid rod, so that the solid rod can withstand greater force.

[0041] As a preferred solution, in the S8 hot pressing molding, the hot pressing machine is preheated to 100° and the pressure value of the machine is set to 40KG, the hot pressing mold is placed on the machine for hot pressing, and the hot pressing machine is kept at a constant temperature and pressure for 15 minutes, thereby completing the pre-curing of the hot pressing mold.

[0042] As a preferred solution, in S9-16, the pre-cured cushion plate and bow frame are deburred and drilled to facilitate subsequent picking up and positioning assembly, and the outer surface of the product is polished and cleaned to facilitate the spray primer to adhere to the outer surface of the product. The product with the primer is then inspected for appearance. If no problems are found, it is placed in an oven for baking.

[0043] As a preferred solution, S17-19 are optional steps. If no problems are found in the previous processing steps, the process proceeds to step S20.

[0044] As a preferred solution, in S20-25, 300-mesh or 600-mesh sandpaper is selected to roughly grind the thick area of ​​the product, and 1500-mesh or 2000-mesh sandpaper is selected to finely grind the entire product to achieve a fine polishing effect;

[0045] The polished cushion plate and bow frame are assembled, and glue is applied to the drilled holes so that the two can be firmly adhered and fixed together. The assembled cushion is then sprayed with topcoat to make the outer surface protective, wear-resistant and scratch-resistant, thus extending the use of the cushion. The cushion is then baked again after the topcoat is sprayed so that the topcoat can adhere firmly to the surface and is not easy to fall off.

[0046] The finished products are then inspected and tested to see if they meet the three-point bending test requirements, and products that do not meet the bending resistance and rigidity requirements are promptly selected.

[0047] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0048] The present invention adopts bio-based epoxy resin to replace traditional petroleum-based epoxy resin, which can reduce the consumption of non-renewable petroleum-based resources, realize environmental protection and carbon fiber recycling, and achieve sustainable and rational use of renewable resources.

[0049] In addition, the use of a new seat cushion manufacturing process can make the seat cushion conform to ergonomics, making the rider more comfortable and less labor-intensive, and has good scratch and wear resistance, extending the service life. Through this processing and molding process, the product's pass rate and product quality stability can be guaranteed during the production process, reducing the occurrence of defective products and reducing the company's production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0051] Figure 1 It is a schematic diagram of the laminated structure of the seat cushion plate of the present invention.

[0052] Figure 2 It is a schematic diagram of the stacked structure of the bow frame of the present invention.

[0053] Figure 3 It is a schematic diagram of the bow frame preforming structure of the present invention. DETAILED DESCRIPTION

[0054] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0055] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0056] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0058] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0059] Reference Figure 1-3 As shown: A carbon fiber seat cushion molding method made of bio-based epoxy resin includes the following manufacturing steps:

[0060] S1: Material preparation: compounding bio-based epoxy resin on carbon fiber sheets, processing them into carbon fiber prepreg through high temperature and high pressure technology, and rolling the carbon fiber prepreg into rolls for subsequent use;

[0061] S2: Software design: Design the size and style of the seat plate and bow frame through 3D software, and analyze the required size and specific quantity of carbon fiber prepreg according to the design drawings of the seat plate and bow frame;

[0062] S3: Yarn cutting: the rolled carbon fiber prepreg is cut by cutting equipment and cut according to the actual required quantity and size;

[0063] S4: Laying, laying the carbon fiber prepreg sheets cut to size in sequence, so that the thickness of the laid carbon fiber prepreg can reach the total thickness required by the drawing and meet the weight, strength and stiffness required by the product;

[0064] S5: Yarn filling: judge whether there is any problem based on the appearance of the product, and perform yarn filling and reinforcement according to the actual situation, and add carbon yarn to the problematic parts for reinforcement;

[0065] S6: Winding, by preforming the carbon fiber prepreg layer into the shape of the bow frame and performing a winding operation on it, the carbon fiber prepreg is arranged in a gradual manner so that it can be rolled into a solid rod in the initial stage of winding, so that the axis of the solid rod made of carbon fiber material has compactness;

[0066] S7: preforming, folding the seat cushion and bow frame according to the laying order;

[0067] Seat cushion preforming: The carbon fiber prepregs are laminated in the order in which they are placed, and the air in each layer is squeezed out to make each layer fit better;

[0068] Bow frame preforming: fold the solid rod into two sections, overlap the end points of the two sections, and cover the overlapped part with filling carbon yarn to improve the connection stability, and add U-shaped carbon yarn at the folded part of the solid rod to improve the connection performance;

[0069] S8: hot pressing mold forming, placing the preformed bow frame and seat cushion plate into the hot pressing mold, and then hot pressing the hot pressing mold through a hot press machine to further expel the air between each layer and enhance the adhesion between each layer;

[0070] S9: demoulding, taking out the heat-pressed bow frame and seat cushion plate;

[0071] S10: Deburring: Use deburring equipment to grind the edges of the bow frame and seat cushion to remove excess carbon yarn and epoxy resin extruded to improve the aesthetics of the product;

[0072] S11: drilling holes, through drilling holes in the punching area above the cushion plate, the position and size of the holes are punched according to the installation position of the bow frame, so as to facilitate the subsequent assembly of the cushion plate and the bow frame together;

[0073] S12: Wet grinding, by grinding the outside of the product, effectively remove the release agent attached to its outer surface, and also grind the outer surface of the product to make it rough, increasing the adhesion of paint and fuel;

[0074] S13: Surface cleaning: by cleaning the outside of the product, dust and impurities attached to the surface are effectively removed to keep the outer surface of the product clean and tidy;

[0075] S14: Primer spraying, by spraying the outer surface of the seat plate and bow frame with a transparent primer;

[0076] S15: Appearance inspection: After spraying the transparent primer, inspect the product to find any holes in time and repair them;

[0077] S16: Baking: putting the painted bow frame and seat cushion into the oven for baking, and drying the paint on the outer surface of the product;

[0078] S17: Wet sanding, rough sanding of the product sprayed with primer after drying;

[0079] S18: Repair: If cracks or gaps are found on the surface of the product, they need to be repaired with putty glue. The repair should be done in small amounts and multiple times.

[0080] S19: Re-baking: After the repair is completed, the product needs to be baked for the second time so that the repaired putty can dry and bond with the original product;

[0081] S20: Grinding with water sandpaper, polishing the seat plate and bow frame, effectively removing the burrs and burrs, and effectively grinding the bends and turning points to make the overall outer surface of the product smooth and flat;

[0082] S21: Assembling, by applying adhesive to the punched positioning areas of the seat cushion plate and the bow frame, so that the bow frame and the seat cushion plate can be firmly bonded and fixed together by the adhesive;

[0083] S22: Spraying topcoat, by spraying topcoat on the surface of the product, it can protect the surface of the product, resist wear and scratch, and the topcoat is sprayed lightly and evenly;

[0084] S23: Re-baking: by baking the product after spraying the topcoat, the paint can be firmly attached to the surface of the product and not easy to fall off;

[0085] S24: Finished product inspection, through the appearance quality inspection of the finished products, select the defective products that do not meet the product quality requirements;

[0086] S25: Finished product testing, using the three-point bending test method to test the assembled seat cushion to see if the product's bending resistance and rigidity meet quality requirements.

[0087] In this embodiment, the bio-based epoxy resin used is selected from bio-based lignin epoxy resin, vegetable oil-based epoxy resin, rosin-based epoxy resin, bio-phenol-based epoxy resin or sugar-based epoxy resin. By immersing the carbon fiber sheet into the bio-based epoxy resin, the interior of the carbon fiber sheet can be fully soaked and filled with the bio-based epoxy resin, thereby enhancing the connection strength and toughness between the carbon fiber materials.

[0088] Specifically, plant oil-based epoxy resins made from castor oil, soybean oil, and linseed oil; biophenol-based epoxy resins made from eugenol, cardanol, guaiacol, vanillin, tannic acid, gallic acid, and protocatechuic acid; sugar-based epoxy resins made from furan and isosorbide; and other bio-based epoxy resins can also be used to make epoxy resins in this production process.

[0089] In the yarn cutting step S3, the cutting equipment used includes a cutting machine or a manual cutter, which cuts a whole piece or a whole roll of carbon fiber prepreg into several small pieces of carbon fiber prepreg by cutting the whole piece or the whole roll of carbon fiber prepreg.

[0090] Specifically, in the S4 laying step, several pieces of cut and classified small carbon fiber prepregs are stacked in sequence. Among them, in the laying of the carbon fiber prepregs of the seat cushion, the carbon fiber prepregs are arranged from bottom to top at 0°, 45°, -45°, 0°, 90°, 0°, 30°, -30°, 45°, -45°, 90°, and 0°, so that the arrangement directions of the carbon fiber prepregs can be stacked in different directions, thereby enhancing the rigidity, stability and support of the seat cushion.

[0091] Furthermore, in the laying of the bow frame, the carbon fiber prepreg is arranged and stacked in 90°, 30°, -30°, 90°, and 90° from bottom to top, so that the bow frame has good hardness and supporting rigidity after being rolled into a solid rod.

[0092] Furthermore, the stacking arrangement at 0° can increase the longitudinal guiding support force, so that the rider has good stability in the front and rear directions and is not prone to front and rear vibrations of the body; the stacking arrangement at 45° and -45° can enhance the stability in the oblique direction, so that the seat cushion will not easily cause the body to shake, allowing the rider to maintain body stability during riding; and the stacking arrangement at 90° can increase the lateral guiding support force, so that the rider has good stability in the left and right directions and is not prone to body shaking, allowing the rider to always maintain good stability in all directions when riding a bicycle and avoid sliding and dislocation.

[0093] The use of carbon fiber prepreg stacked at 30° and -30° on the bow frame can increase the downward support force, so that the carbon fiber arranged in the longitudinal direction can be supported by the carbon fiber arranged in the diagonal direction, which provides a good protective support effect and avoids the seat cushion from being unable to withstand the downward pressure of the rider.

[0094] In actual use, in the carbon fiber prepreg ply setting of the seat cushion panel, reinforcing patches are also arranged between the 0° and 90°, and between the 90° and 0° layers to increase the strength of the carbon fiber stacking of the seat cushion panel, so that it has better support and rigidity, thereby bearing heavier weight.

[0095] In the S7 preforming process of this embodiment, the protective blue film and release paper are torn off from the sequentially stacked carbon fiber prepregs, so that the carbon fiber prepregs and the reinforcement patches can be placed in sequence, and are manually arranged and placed so that the adjacent layers can be closely attached together, and the air between each layer is discharged to the outside, thereby reducing the bubbles caused by the air and reducing the occurrence of defective products;

[0096] U-shaped carbon yarns are arranged at the connection and folding parts of the solid rod, so that the U-shaped carbon yarns can strengthen the connection and folding parts of the solid rod, enable it to withstand greater force, and will not get loose during long-term use, thereby ensuring the quality and safety performance of the seat cushion.

[0097] In the S8 hot pressing mold forming of the present embodiment, before use, the hot press is preheated to 100° and the pressure value of the machine is set to 40KG, and then the hot pressing mold is placed on the machine for hot pressing processing. The hot press is maintained at a constant temperature and pressure state for 15 minutes, thereby completing the pre-curing of the hot pressing mold, so that the carbon fiber material can be heated and pressurized to form a corresponding shape.

[0098] Specifically, in step S9-16, the pre-cured seat cushion plate and bow frame are deburred and drilled to facilitate subsequent picking up and positioning assembly, and the outer surface of the product is polished and cleaned to facilitate the spray primer to adhere to the outer surface of the product. The primed product is then inspected for appearance. If no problems are found, it is placed in an oven for baking so that the primer can firmly adhere to the outer surface of the product to provide a layer of protection.

[0099] In actual use, steps S17-19 are optional steps. If no problems are found in the previous processing steps, proceed to step S20; if problem points are found, they need to be repaired, cleaned, and baked again, and checked again to see if there are any problem points, and repaired in time. After all problem points are repaired, the product will be ground and polished to give the product a neat surface.

[0100] Specifically, in step S20-25, 300-mesh or 600-mesh sandpaper is selected to roughly grind the thick area of ​​the product, and 1500-mesh or 2000-mesh sandpaper is selected to finely grind the entire product to achieve a fine polishing effect;

[0101] The polished cushion plate and bow frame are assembled, and glue is applied to the drilled holes so that the two can be firmly adhered and fixed together. The assembled cushion is then sprayed with topcoat to make the outer surface protective, wear-resistant and scratch-resistant, thus extending the use of the cushion. The topcoat-sprayed cushion is then baked again so that the topcoat can firmly adhere to the surface and is not easy to fall off.

[0102] Finally, the finished products are inspected and tested to see if they meet the three-point bending test requirements, and products that do not meet the bending resistance and rigidity requirements are promptly selected.

[0103] In this embodiment, the baking temperature inside the oven is set at 90°C, and the product is baked in the oven for 60-90 minutes. Specifically, when spraying primer and topcoat for the first time, the product is baked in the oven for 90 minutes so that the paint can firmly adhere to the outer surface of the product; if painting is performed again after repair, the baking time needs to be shortened and the product is baked in the oven for another 60 minutes so that the later sprayed paint can adhere to the outer surface of the product and is not easy to fall off.

[0104] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for explaining the principles of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementations of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A method for forming a carbon fiber seat cushion made of bio-based epoxy resin, characterized in that: The production steps include: S1: Material preparation: compounding bio-based epoxy resin on carbon fiber sheets, processing them into carbon fiber prepreg through high temperature and high pressure technology, and rolling the carbon fiber prepreg into rolls for subsequent use; S2: Software design: Design the size and style of the seat plate and bow frame through 3D software, and analyze the required size and specific quantity of carbon fiber prepreg according to the design drawings of the seat plate and bow frame; S3: Yarn cutting: the rolled carbon fiber prepreg is cut by cutting equipment and cut according to the actual required quantity and size; S4: Laying, laying the carbon fiber prepreg sheets cut to size in sequence, so that the thickness of the laid carbon fiber prepreg can reach the total thickness required by the drawing and meet the weight, strength and stiffness required by the product; S5: Yarn filling: judge whether there is any problem based on the appearance of the product, and perform yarn filling and reinforcement according to the actual situation, and add carbon yarn to the problematic parts for reinforcement; S6: Winding, by preforming the carbon fiber prepreg layer into the shape of the bow frame and performing a winding operation on it, the carbon fiber prepreg is arranged in a gradual manner so that it can be rolled into a solid rod in the initial stage of winding, so that the axis of the solid rod made of carbon fiber material has compactness; S7: preforming, folding the seat cushion and bow frame according to the laying order; Seat cushion preforming: The carbon fiber prepregs are laminated in the order in which they are placed, and the air in each layer is squeezed out to make each layer fit better; Bow frame preforming: fold the solid rod into two sections, overlap the end points of the two sections, and cover the overlapped part with filling carbon yarn to improve the connection stability, and add U-shaped carbon yarn at the folded part of the solid rod to improve the connection performance; S8: hot pressing mold forming, placing the preformed bow frame and seat cushion plate into the hot pressing mold, and then hot pressing the hot pressing mold through a hot press machine to further expel the air between each layer and enhance the adhesion between each layer; S9: demoulding, taking out the heat-pressed bow frame and seat cushion plate; S10: Deburring: Use deburring equipment to grind the edges of the bow frame and seat cushion to remove excess carbon yarn and epoxy resin extruded to improve the aesthetics of the product; S11: drilling holes, through drilling holes in the punching area above the cushion plate, the position and size of the holes are punched according to the installation position of the bow frame, so as to facilitate the subsequent assembly of the cushion plate and the bow frame together; S12: Wet grinding, by grinding the outside of the product, effectively remove the release agent attached to its outer surface, and also grind the outer surface of the product to make it rough, increasing the adhesion of paint and fuel; S13: Surface cleaning: by cleaning the outside of the product, dust and impurities attached to the surface are effectively removed to keep the outer surface of the product clean and tidy; S14: Primer spraying, by spraying the outer surface of the seat plate and bow frame with a transparent primer; S15: Appearance inspection: After spraying the transparent primer, inspect the product to find any holes in time and repair them; S16: Baking: putting the painted bow frame and seat cushion into the oven for baking, and drying the paint on the outer surface of the product; S17: Wet sanding, rough sanding of the product sprayed with primer after drying; S18: Repair: If cracks or gaps are found on the surface of the product, they need to be repaired with putty glue. The repair should be done in small amounts and multiple times. S19: Re-baking: After the repair is completed, the product needs to be baked for the second time so that the repaired putty can dry and bond with the original product; S20: Grinding with water sandpaper, polishing the seat plate and bow frame, effectively removing the burrs and burrs, and effectively grinding the bends and turning points to make the overall outer surface of the product smooth and flat; S21: Assembling, by applying adhesive to the punched positioning areas of the seat cushion plate and the bow frame, so that the bow frame and the seat cushion plate can be firmly bonded and fixed together by the adhesive; S22: Spraying topcoat, by spraying topcoat on the surface of the product, it can protect the surface of the product, resist wear and scratch, and the topcoat is sprayed lightly and evenly; S23: Re-baking: by baking the product after spraying the topcoat, the paint can be firmly attached to the surface of the product and not easy to fall off; S24: Finished product inspection, through the appearance quality inspection of the finished products, select the defective products that do not meet the product quality requirements; S25: Finished product testing, using the three-point bending test method to test the assembled seat cushion to see if the product's bending resistance and rigidity meet quality requirements.

2. The method for forming a carbon fiber seat cushion made of bio-based epoxy resin according to claim 1, characterized in that: The bio-based epoxy resin is selected from bio-based lignin epoxy resin, vegetable oil-based epoxy resin, rosin-based epoxy resin, bio-phenol-based epoxy resin or sugar-based epoxy resin. By immersing the carbon fiber sheet into the bio-based epoxy resin, the interior of the carbon fiber sheet can be fully soaked and filled with the bio-based epoxy resin, thereby enhancing the connection strength and toughness between the carbon fiber materials.

3. The method for forming a carbon fiber seat cushion made of bio-based epoxy resin according to claim 2, characterized in that: The cutting equipment used in the S3 yarn cutting includes a cutting machine or a manual cutter, which cuts a whole piece or a whole roll of carbon fiber prepreg into a plurality of small carbon fiber prepreg pieces by cutting the whole piece or the whole roll of carbon fiber prepreg.

4. The method for forming a carbon fiber seat cushion made of bio-based epoxy resin according to claim 3, characterized in that: In the layering in S4, a plurality of small carbon fiber prepregs that have been cut and classified are stacked in sequence, wherein in the layering of the carbon fiber prepregs of the seat cushion plate, the carbon fiber prepregs are stacked in the directions of 0°, 45°, -45°, 0°, 90°, 0°, 30°, -30°, 45°, -45°, 90°, and 0° from bottom to top; In the laying of the bow frame, the carbon fiber prepreg is arranged and stacked in layers from bottom to top in the order of 90°, 30°, -30°, 90°, and 90°.

5. The method for forming a carbon fiber seat cushion made of bio-based epoxy resin according to claim 4, characterized in that: In the carbon fiber prepreg ply arrangement of the cushion plate, reinforcement patches are also arranged between 0° and 90°, and between 90° and 0°.

6. The method for forming a carbon fiber seat cushion made of bio-based epoxy resin according to claim 5, characterized in that: In the preforming of S7, the protective blue film and release paper of the sequentially stacked carbon fiber prepregs are torn off, so that the carbon fiber prepregs and the reinforcement patches can be placed in sequence, and the adjacent layers can be closely attached together by manual arrangement, and the air between each layer can be discharged outward; U-shaped carbon yarns are arranged at the connection and folding parts of the solid rod, so that the U-shaped carbon yarns can strengthen the connection and folding parts of the solid rod, so that the solid rod can withstand greater force.

7. The method for forming a carbon fiber seat cushion made of bio-based epoxy resin according to claim 1, characterized in that: In the S8 hot pressing molding, the hot pressing machine is preheated to 100° and the pressure value of the machine is set to 40KG. The hot pressing mold is then placed on the machine for hot pressing. The hot pressing machine is kept at a constant temperature and pressure for 15 minutes to complete the pre-curing of the hot pressing mold.

8. The method for forming a carbon fiber seat cushion made of bio-based epoxy resin according to claim 7, characterized in that: In the S9-16, the pre-cured cushion plate and bow frame are deburred and drilled to facilitate subsequent picking up and positioning assembly, and the outer surface of the product is polished and cleaned to facilitate the spray primer to adhere to the outer surface of the product. The appearance of the primed product is then inspected. If no problems are found, it is placed in an oven for baking.

9. The method for forming a carbon fiber seat cushion made of bio-based epoxy resin according to claim 8, characterized in that: The steps S17-19 are optional steps. If no problem is found in the previous processing steps, the process proceeds to step S20.

10. The method for forming a carbon fiber seat cushion made of bio-based epoxy resin according to claim 9, characterized in that: In the S20-25, 300-mesh or 600-mesh sandpaper is selected to roughly grind the thick area of ​​the product, and 1500-mesh or 2000-mesh sandpaper is selected to finely grind the entire product to achieve a fine polishing effect; The polished cushion plate and bow frame are assembled, and glue is applied to the drilled holes so that the two can be firmly adhered and fixed together. The assembled cushion is then sprayed with topcoat to make the outer surface protective, wear-resistant and scratch-resistant, thus extending the use of the cushion. The cushion is then baked again after the topcoat is sprayed so that the topcoat can adhere firmly to the surface and is not easy to fall off. The finished products are then inspected and tested to see if they meet the three-point bending test requirements, and products that do not meet the bending resistance and rigidity requirements are promptly selected.

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