Manufacturing process of thermoplastic resin carbon plate
By using thermoplastic resin as a material and using process steps such as hot pressing molding, the problem of thermosetting carbon fiber board being affected by temperature differences during preforming is solved, and a more stable and economical production process is achieved.
Patent Information
- Application Number
- CN202510153494.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2025-04-29
AI Technical Summary
Existing thermosetting carbon fiber boards are easily affected by seasonal temperature differences when preformed, resulting in excessive stickiness or difficulty in bonding between prepregs, and strict storage conditions, which increases production costs and management difficulties.
Thermoplastic resin is used as the material for carbon fiber prepreg, and thermoplastic resin carbon plates are manufactured through cutting, preforming, hot-pressing, grinding, sandblasting, surface cleaning, spraying primer, primer baking, grinding, spraying topcoat, topcoat baking and testing.
Thermoplastic resin carbon fiber prepreg maintains good fluidity and plasticity at high temperatures, avoiding bonding problems caused by temperature differences, and can be stored for a long time in a room temperature environment, reducing storage and production costs, and improving product stability and reuse rate.
Smart Images
Figure CN119898060A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of sports shoe carbon plate production, in particular to a manufacturing process of a thermoplastic resin carbon plate. Background Art
[0002] With the progress and development of society, people's living standards are improving day by day, and improving their physical fitness has become an important direction of daily leisure and entertainment activities. Running, climbing, cycling, walking, race walking and other daily sports can be seen everywhere in life, but in each activity, a pair of comfortable and safe sports shoes is indispensable. In the development of sports shoes, its durability has always been its important feature.
[0003] At present, the soles of sports shoes are mainly made of plastic or rubber, which has some shortcomings in terms of support, stability and anti-torsion ability. In order to further improve the performance of the soles, thermosetting carbon fiber plates are used in the soles.
[0004] The application of thermosetting carbon fiber boards in shoe soles is mainly reflected in basketball shoes, running shoes and other sports shoes. Its main function is to enhance the support, stability and torsion resistance of the shoes, while reducing the weight of the shoes and improving sports performance. The application of thermosetting carbon fiber boards has significantly improved the performance and wearing experience of sports shoes, especially in sports that require high stability and support. However, during the pre-forming of existing thermosetting carbon fiber boards, due to the influence of seasonal temperature differences, the prepregs are often too sticky or difficult to bond, which seriously affects the molding quality of the product. At the same time, the storage conditions of thermosetting carbon fiber boards are strict and they need to be stored in a freezer of specific size and temperature, which increases production costs and management difficulties.
[0005] Therefore, it is necessary to study a new technical solution to solve the above problems. Summary of the invention
[0006] In view of this, the present invention aims to solve the deficiencies in the prior art, and its main purpose is to provide a manufacturing process for a thermoplastic resin carbon plate.
[0007] To achieve the above purpose, the present invention adopts the following technical solutions:
[0008] A manufacturing process of a thermoplastic resin carbon plate specifically comprises the following steps:
[0009] S1. Prepare materials, select carbon fiber prepreg of corresponding specifications as raw materials according to production requirements;
[0010] S2, cutting the yarn, cutting the carbon fiber prepreg by a cutting device, and cutting and processing according to the actual required size to obtain the required number of carbon fiber prepreg sheets;
[0011] S3, pre-forming, determining the total ply thickness of the corresponding carbon fiber prepreg according to production requirements, and laminating all prepregs in a specified order to obtain pre-stacked carbon fiber prepreg;
[0012] S4, hot pressing molding, placing the pre-stacked carbon fiber prepreg into a molding mold, hot pressing the molding mold through a hot press, and cooling and demoulding to obtain a finished product;
[0013] S5, roughing. According to the production requirements of the product, the edges of the finished product will be polished by polishing equipment;
[0014] S6, sandblasting, roughening the area other than the effect surface on the finished product according to the production requirements of the product;
[0015] S7. Surface cleaning: clean the surface of the finished product to ensure that there is no impurities and dust on the surface, and ensure that the surface remains clean and tidy;
[0016] S8, spraying primer, spraying primer on the bottom surface of the finished product;
[0017] S9, primer baking, the finished product is placed in a drying device for baking, and the drying temperature is 80-90°C and the baking time is 80-100min, so that the bottom paint of the finished product is dried;
[0018] S10, grinding, use grinding equipment to roughly grind the surface of the product sprayed with primer, and the grinding direction must be in the same direction;
[0019] S11, spraying topcoat, spraying topcoat on the surface of the finished product;
[0020] S12, topcoat baking, placing the finished product in a drying device for baking, and the drying temperature is 80-90°C and the baking time is 80-100min, so that the surface paint of the finished product is dried;
[0021] S13, Inspection, conduct appearance inspection on the products after painting to screen out defective products; the screened products are then tested for bending properties by testing equipment to distinguish qualified products from defective products.
[0022] As a further explanation, in step S1, the carbon fiber prepreg is a thermoplastic resin carbon fiber prepreg.
[0023] As a further illustration, in step S2, the number of sheets of the carbon fiber prepreg includes four 0° yarns, two 45° yarns and two -45° yarns.
[0024] As a further explanation, in step S3, all carbon fiber prepregs are stacked in sequence from bottom to top in the order of 0°, 45°, -45°, 0°, 0°, 45°, -45°, and 0°, and the protective film and release paper on the carbon fiber prepreg are torn off before stacking.
[0025] As a further explanation, step S3 also includes a yarn filling step for strengthening the rigidity of the middle waist and / or rear end of the pre-stacked carbon fiber prepreg and improving the overall stability of the pre-stacked carbon fiber prepreg.
[0026] As a further explanation, in step S4, before the product is hot-pressed, the molding mold is cleaned and the surface is wiped to ensure that there is no foreign matter and impurities inside the molding mold, and then an appropriate amount of release agent is applied to the upper and lower mold surfaces of the cleaned molding mold to facilitate the smooth demolding of subsequent products.
[0027] As a further explanation, during hot pressing molding, the heated mold is placed inside the hot press machine, and then the pre-stacked carbon fiber prepreg is placed in the molding mold and its basic shape is fixed. After the carbon fiber prepregs between different layers begin to fuse, the molding mold is closed.
[0028] As a further explanation, the temperature of the hot press machine is 260-270℃, and the molding mold must be placed only after the hot press machine is heated to 260℃; the pressure of the hot press machine is 60-70kg; after the mold is closed, the hot press machine needs to maintain a constant temperature and pressure for 60s; after the molded product is solidified, the molding mold is sent to the cooling machine, and the pressure of the cooling machine is 60kg, until the molding mold is cooled to room temperature, and then it can be demolded.
[0029] As a further explanation, in steps S5-S6, a protective surface treatment is also included, which is used to stick a protective film on the effect surface of the finished product to protect the effect surface of the finished product to prevent subsequent operations from cutting the surface of the finished product and causing scratches.
[0030] As a further explanation, in step S11, a topcoat with a hardness of 2H or 3H is used to spray the surface of the molded product, and the sprayed surface needs to be kept light, thin and uniform.
[0031] 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:
[0032] 1. By using carbon fiber prepreg made of thermoplastic resin, the thermoplastic resin carbon fiber prepreg can maintain good fluidity and plasticity at high temperature, which makes it easier for the thermoplastic resin carbon fiber prepreg to adapt to different temperature and pressure conditions during the preforming process, avoiding the phenomenon of over-stickiness or difficulty in bonding between prepregs due to seasonal temperature differences;
[0033] 2. By using carbon fiber prepreg with thermoplastic resin for ply design, not only the degree of freedom of ply angle can be increased, but also the stability of the product can be improved. At the same time, the elasticity of the product can be improved, and the resilience during wearing can be increased, making it more comfortable to wear;
[0034] 3. Carbon fiber prepreg made of thermoplastic resin can be stored for a long time at room temperature compared to thermosetting carbon fiber prepreg, without the need to store at a specified temperature and in a specified place, thus reducing storage costs and thus reducing product production costs;
[0035] 4. By using carbon fiber prepreg made of thermoplastic resin, compared with thermosetting carbon fiber prepreg, carbon fiber prepreg made of thermoplastic resin can be molded multiple times, and the molecular structure is basically unchanged, which will not affect the performance of the product and reduce the defective rate of the product. At the same time, the discarded products can be recycled to improve the reuse rate of the products. BRIEF DESCRIPTION OF THE DRAWINGS
[0036] 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.
[0037] Figure 1 A schematic diagram of a process for manufacturing a thermoplastic resin carbon plate provided by the present invention;
[0038] Figure 2 A schematic diagram of the structures of 0° yarn, 45° yarn and -45° yarn provided by the present invention;
[0039] Figure 3 A schematic diagram of the internal structure of the pre-stacked carbon fiber prepreg provided by the present invention;
[0040] Figure 4 The present invention is a schematic diagram of the process of yarn mending provided by the present invention. DETAILED DESCRIPTION
[0041] 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.
[0042] 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.
[0043] 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.
[0044] 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.
[0045] 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.
[0046] In one embodiment of the present invention, Figure 1-4 As shown, a manufacturing process of a thermoplastic resin carbon plate is provided, which specifically includes the following steps:
[0047] S1. Prepare materials. Select carbon fiber prepreg of corresponding specifications as raw materials according to production requirements.
[0048] S2, yarn cutting, cutting the carbon fiber prepreg by cutting equipment, and cutting and processing according to the actual required size to obtain the required number of carbon fiber prepreg sheets.
[0049] In this embodiment, a cutting machine or a large chopping knife cuts the carbon fiber prepreg, and the cutting angle is determined according to the rigidity requirements of the finished product.
[0050] like Figure 2 As shown, with the longitudinal axis of the carbon plate as the central axis, the left is positive and the right is negative. For example: using 0° yarn to increase vertical anisotropic support, increase the rigidity and stability in the front and rear direction when pedaling, using 45° yarn to increase anisotropic support, increase the rigidity and stability in the front and rear 45° direction when pedaling, and do not cause the body to sway left and right; using -45° yarn to increase anisotropic support, increase the rigidity reinforcement in the -45° direction when pedaling, and do not cause the body to sway left and right.
[0051] S3, pre-forming, determine the total ply thickness of the corresponding carbon fiber prepreg according to production requirements, and laminate all prepregs in the specified order. Before laminating, the protective film and release paper on the prepreg need to be removed to obtain the pre-stacked carbon fiber prepreg.
[0052] S4, hot pressing molding, placing the pre-stacked carbon fiber prepreg into a molding mold, hot pressing the molding mold through a hot press machine, and cooling and demoulding to obtain a finished product.
[0053] S5. Roughening: According to the production requirements of the product, the edge of the finished product will be polished by a polishing device. In this embodiment, the polishing device can be a sandpaper grinding wheel or a grinder. The peripheral edge of the finished product is polished by the polishing device to improve the integrity and aesthetics of the product appearance.
[0054] S6. Sandblasting: According to the production requirements of the product, the areas other than the effect surface of the finished product are roughened to increase its effective contact area and also improve its subsequent adhesion with other plastics or rubbers.
[0055] S7. Surface cleaning: Clean the surface of the finished product to ensure that there is no impurities and dust on the surface, ensuring that the surface remains clean and tidy.
[0056] S8. Primer spraying: spray primer on the bottom surface of the finished product. After the primer spraying is completed, observe the bottom surface of the finished product, select the products with defective holes, and fill them in time.
[0057] S9, primer baking, the finished product is placed in a drying device for baking, and the drying temperature is 80-90°C and the baking time is 80-100 minutes, so that the bottom paint of the finished product is dried.
[0058] S10, grinding, roughly grinding the surface of the product sprayed with primer by grinding equipment, and the grinding direction needs to be polished in the same direction. In this embodiment, wet grinding can be used, using water sandpaper or water-spraying grinder to grind the product, and the grinding is carried out in the same direction. At the same time, it is necessary to ensure that the grinding is light and thin during the grinding process, and do not grind too deeply to cause resin loss, which will cause serious damage to the appearance of the product, and keep the surface of the product soft and smooth after grinding.
[0059] S11, spray the surface of the finished product with topcoat to protect the surface of the product and resist strong scratches and wear. At the same time, the spraying surface should be kept light, thin and uniform to avoid paint accumulation on the surface of the product causing serious ripple marks.
[0060] S12, topcoat baking, the finished product is placed in a drying device for baking, and the drying temperature is 80-90°C and the baking time is 80-100 minutes, so that the surface paint of the finished product is dried.
[0061] S13, Inspection, conduct appearance inspection on the products after painting to screen out defective products. The screened products are then tested for bending properties by testing equipment to distinguish qualified products from defective products.
[0062] By using carbon fiber prepreg made of thermoplastic resin, the thermoplastic resin carbon fiber prepreg can maintain good fluidity and plasticity at high temperatures, which makes it easier for the thermoplastic resin carbon fiber prepreg to adapt to different temperature and pressure conditions during the preforming process, avoiding the phenomenon of over-stickiness or difficulty in bonding between prepregs due to seasonal temperature differences.
[0063] By using carbon fiber prepreg with thermoplastic resin for layer design, not only the freedom of layer angle can be improved, but also the stability of the product can be improved. At the same time, the elasticity of the product can be improved, the resilience during wearing can be increased, and the wearing can be more comfortable.
[0064] By using carbon fiber prepreg made of thermoplastic resin, compared with thermosetting carbon fiber prepreg, carbon fiber prepreg made of thermoplastic resin can be stored for a long time at room temperature, without the need to be stored at a specified temperature and in a specified place, thus reducing storage costs and thus reducing product production costs.
[0065] By using carbon fiber prepreg made of thermoplastic resin, compared with thermosetting carbon fiber prepreg, carbon fiber prepreg made of thermoplastic resin can be molded multiple times, and the molecular structure is basically unchanged, which will not affect the performance of the product and reduce the defective rate of the product. At the same time, discarded products can be recycled to improve the reuse rate of the product.
[0066] Preferably, in step S1, the carbon fiber prepreg uses a thermoplastic resin carbon fiber prepreg. Using the thermoplastic resin carbon fiber prepreg as the raw material, compared with the existing thermosetting carbon fiber board, the thermoplastic resin carbon fiber prepreg is not easily affected by the temperature difference during pre-forming, resulting in over-stickiness or difficulty in bonding, thereby improving the molding quality of the product. At the same time, the storage conditions of the thermoplastic resin carbon fiber board are relatively loose, and no freezer of a specific size and temperature is required, which reduces the cost expenditure.
[0067] Preferably, in step S2, the number of carbon fiber prepregs includes four 0° yarns, two 45° yarns and two -45° yarns. The yarns are cut into four 0° yarns, two 45° yarns and two -45° yarns to improve material preparation for subsequent lamination.
[0068] In the remaining embodiments, the number of prepreg sheets and the angles of the prepreg are specifically adjusted according to actual production requirements as long as they meet the production requirements.
[0069] Furthermore, in step S3, all carbon fiber prepregs are stacked in order from bottom to top in the order of 0°, 45°, -45°, 0°, 0°, 45°, -45°, 0°, and the protective film and release paper on the carbon fiber prepreg are torn off before stacking. The mechanical properties and stability of the product can be ensured by laminating the carbon fiber prepregs in the specified order. Compared with the bonding problems that may occur in the pre-forming of the existing thermosetting carbon fiber boards, the thermoplastic resin carbon fiber prepreg is easier to control, and there is no need to worry about the bonding problems caused by temperature differences, thereby improving the overall quality of the product.
[0070] Furthermore, in step S3, a yarn filling step is also included to strengthen the rigidity of the middle waist and / or rear end of the pre-stacked carbon fiber prepreg, and improve the overall stability of the pre-stacked carbon fiber prepreg. Yarn filling of the middle waist and / or rear end of the product according to the performance requirements of the product can improve the support and stability of the middle waist of the product, and can also enhance the rigidity of the rear end, thereby improving the overall quality of the product.
[0071] Preferably, in step S4, before the product is hot-pressed, the molding die is cleaned and the surface is wiped to ensure that there are no foreign matter and impurities inside the molding die, so as to avoid the foreign matter or impurities inside the molding die affecting the molding quality of the product. Then, apply an appropriate amount of release agent on the upper and lower mold surfaces of the cleaned molding die to facilitate the smooth demoulding of subsequent products. Among them, the amount of release agent applied needs to be applied appropriately according to the production requirements of the product. Do not apply excessively to cause it to accumulate on the surface of the product, resulting in unnecessary subsequent process flow and reduced production efficiency. Insufficient application of release agent will make it difficult to demould the product, cause damage to the product surface, and increase the defective rate.
[0072] Furthermore, during hot pressing, the heating mold is placed inside the hot press, and then the pre-stacked carbon fiber prepreg is placed in the molding mold and its basic shape is fixed. After the carbon fiber prepregs between different stacks begin to fuse, the molding mold is closed. Such an operation can ensure the basic shape of the product, reduce the defective molding rate of the product, and improve the molding quality of the product.
[0073] Furthermore, the temperature of the hot press is 260-270°C, and the molding mold is placed only after the hot press is heated to 260°C. The pressure of the hot press is 60-70kg. After mold closing, the hot press needs to maintain constant temperature and pressure for 60s. After the molded product is solidified, the molding mold is sent to the cooling machine, and the pressure of the cooling machine is 60kg, until the molding mold is cooled to room temperature, it can be demoulded. In this embodiment, the temperature of the hot press is preferably 260°C, and the machine pressure is 60kg. After the product is kept at a constant temperature and pressure of the hot press for 60s, it is moved to the cooling machine and cooled to room temperature, and then demolded to obtain the finished product.
[0074] Preferably, in steps S5-S6, a protective surface treatment is also included, which is used to stick a protective film on the effect surface of the finished product to protect the effect surface of the finished product to prevent subsequent operations from cutting the surface of the finished product and causing scratches. In this embodiment, the protective film can be made of R glue, masking paper, tape paper, pearlescent paper, etc.
[0075] Preferably, in step S11, a topcoat with a hardness of 2H or 3H is used to spray the surface of the molded product, and the sprayed surface needs to be kept thin and uniform. Selecting a topcoat with a hardness of 2H or 3H to spray the surface of the product protects the surface of the product and resists strong scratches and wear. At the same time, the sprayed surface is kept thin and uniform to avoid paint accumulation and cause serious ripple marks on the surface of the product.
[0076] 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 process for manufacturing a thermoplastic resin carbon plate, characterized in that: The specific steps include: S1. Prepare materials, select carbon fiber prepreg of corresponding specifications as raw materials according to production requirements; S2, cutting the yarn, cutting the carbon fiber prepreg by a cutting device, and cutting and processing according to the actual required size to obtain the required number of carbon fiber prepreg sheets; S3, pre-forming, determining the total ply thickness of the corresponding carbon fiber prepreg according to production requirements, and laminating all prepregs in a specified order to obtain pre-stacked carbon fiber prepreg; S4, hot pressing molding, placing the pre-stacked carbon fiber prepreg into a molding mold, hot pressing the molding mold through a hot press, and cooling and demoulding to obtain a finished product; S5, roughing: according to the production requirements of the product, the edge of the finished product will be polished by grinding equipment; S6, sandblasting, roughening the area other than the effect surface on the finished product according to the production requirements of the product; S7. Surface cleaning: clean the surface of the finished product to ensure that there is no impurities and dust on the surface, and ensure that the surface remains clean and tidy; S8, spraying primer, spraying primer on the bottom surface of the finished product; S9, primer baking, the finished product is placed in a drying device for baking, and the drying temperature is 80-90°C and the baking time is 80-100min, so that the bottom paint of the finished product is dried; S10, grinding, use grinding equipment to roughly grind the surface of the product sprayed with primer, and the grinding direction must be in the same direction; S11, spraying topcoat, spraying topcoat on the surface of the finished product; S12, topcoat baking, placing the finished product in a drying device for baking, and the drying temperature is 80-90°C and the baking time is 80-100min, so that the surface paint of the finished product is dried; S13, Inspection, conduct appearance inspection on the products after painting to screen out defective products; the screened products are then tested for bending properties by testing equipment to distinguish qualified products from defective products.
2. The process for manufacturing a thermoplastic resin carbon plate according to claim 1, characterized in that: In step S1, the carbon fiber prepreg is thermoplastic resin carbon fiber prepreg.
3. The manufacturing process of the thermoplastic resin carbon plate according to claim 1, characterized in that: In step S2, the number of sheets of the carbon fiber prepreg includes four 0° yarns, two 45° yarns and two -45° yarns.
4. The process for manufacturing a thermoplastic resin carbon plate according to claim 3, characterized in that: In step S3, all carbon fiber prepregs are stacked in sequence from bottom to top in the order of 0°, 45°, -45°, 0°, 0°, 45°, -45°, and 0°, and the protective film and release paper on the carbon fiber prepreg are torn off before stacking.
5. The process for manufacturing a thermoplastic resin carbon plate according to claim 4, characterized in that: In step S3, a yarn filling step is also included to strengthen the rigidity of the middle waist and / or rear end of the pre-stacked carbon fiber prepreg and improve the overall stability of the pre-stacked carbon fiber prepreg.
6. The process for manufacturing a thermoplastic resin carbon plate according to claim 1, characterized in that: In step S4, before the product is hot-pressed, the molding mold is cleaned and the surface is wiped to ensure that there are no foreign matter and impurities inside the molding mold, and then a proper amount of mold release agent is applied to the upper and lower mold surfaces of the cleaned molding mold to facilitate the smooth demolding of the subsequent product.
7. The process for manufacturing a thermoplastic resin carbon plate according to claim 6, characterized in that: During hot pressing, the heated mold is placed inside the hot press, and then the pre-stacked carbon fiber prepreg is placed in the molding mold and its basic shape is fixed. After the carbon fiber prepregs between different layers begin to fuse, the molding mold is closed.
8. The process for manufacturing a thermoplastic resin carbon plate according to claim 7, characterized in that: The temperature of the hot press machine is 260-270℃, and the molding mold must be placed only after the hot press machine is heated to 260℃; the pressure of the hot press machine is 60-70kg; after the mold is closed, the hot press machine needs to maintain a constant temperature and pressure for 60s; after the molded product is solidified, the molding mold is sent to the cooling machine, and the pressure of the cooling machine is 60kg, until the molding mold is cooled to room temperature, and then it can be demolded.
9. The process for manufacturing a thermoplastic resin carbon plate according to claim 1, characterized in that: In steps S5-S6, a protective surface treatment is also included, which is used to stick a protective film on the effect surface of the finished product to protect the effect surface of the finished product to prevent subsequent operations from cutting the surface of the finished product and causing scratches.
10. The process for manufacturing a thermoplastic resin carbon plate according to claim 1, characterized in that: In step S11, a topcoat with a hardness of 2H or 3H is used to spray the surface of the molded product, and the sprayed surface needs to be kept light, thin and uniform.