3D printing composite material forming mold and manufacturing method thereof

Abstract

The invention discloses a 3D printing composite material forming mold and a manufacturing method thereof. The 3D printing composite material forming mold comprises a composite material base body, a base and a Z-direction limiting structure. The top face of the composite material base body is a forming face. The base is connected to the bottom of the composite material base body; the Z-direction limiting structure is arranged between the composite material base body and the base and used for limiting Z-direction displacement of the composite material base body under the high-temperature working condition, and the Z-direction limiting structure has the beneficial effects that buckling deformation of the mold under the influence of the high-temperature working condition is reduced, and the forming quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 3D printing mold, and particularly relates to a 3D printing composite material forming mold and a manufacturing method thereof. BACKGROUND

[0002] Compared with metal material covers, carbon fiber reinforced resin matrix composite material covers have higher specific strength, which is extremely beneficial to the lightweight design and manufacturing of aircraft, and thus are widely used in the production and manufacturing of aircraft covers at home and abroad. In order to realize rapid and low-cost manufacturing of the covers, a thermoplastic 3D printing forming process is usually used to print a composite material cover forming mold, and the cover is cured and formed on the forming mold.

[0003] Such a forming mold only needs to be printed by a thermoplastic composite material 3D printing plus a simple machining and connecting process, so as to ensure rapid manufacturing of the composite material mold in the aircraft manufacturing process. Since the thermal expansion coefficient of the existing thermoplastic composite material 3D printing material is obviously anisotropic, the rigidity of the composite material forming mold manufactured by the process is relatively weak. Under high temperature working conditions, the thermal expansion amounts in different directions are quite different, internal stress is generated, and in addition, the overall rigidity of the mold is weak, so that the mold is prone to warping deformation, thereby affecting the part forming precision and forming effect. SUMMARY

[0004] The main purpose of the present application is to provide a 3D printing composite material forming mold and a manufacturing method thereof, which aims to solve the technical problem that the existing composite material forming mold is easily affected by high temperature working conditions and generates warping deformation.

[0005] In order to achieve the above-mentioned purpose, the present application provides a 3D printing composite material forming mold, which comprises a composite material base body, a base and a Z-direction limiting structure: the top surface of the composite material base body is a forming surface; the base is connected to the bottom of the composite material base body; the Z-direction limiting structure is arranged between the composite material base body and the base, and is used for limiting the Z-direction displacement of the composite material base body under high temperature working conditions.

[0006] Optionally, the Z-direction limiting structure comprises a plurality of first waist-shaped holes, a plurality of second waist-shaped holes and a plurality of connecting pieces, the plurality of first waist-shaped holes are arranged on the base; the plurality of second waist-shaped holes are arranged on the bottom of the composite material base body, and the second waist-shaped holes and the first waist-shaped holes are one-to-one corresponding in position; and the connecting pieces penetrate the center positions of the first waist-shaped holes and the corresponding second waist-shaped holes, so as to connect the base to the bottom of the composite material base body.

[0007] Optionally, the center positions of the second waist-shaped holes and the first waist-shaped holes correspond to each other, and the length directions of the second waist-shaped holes and the first waist-shaped holes are perpendicular to each other.

[0008] Optionally, the base comprises a square steel framework, a plurality of reference blocks and a reference plate; the plurality of reference blocks are connected to the bottom of the square steel framework; the reference plate is connected to the top surface of the square steel framework, and a plurality of first waist-shaped holes are formed through the reference plate.

[0009] Optionally, the composite base comprises a main frame and a support lattice; the top surface of the main frame is a shaped surface, and a plurality of second waist-shaped holes are formed in the bottom of the main frame; the support lattice is arranged in the main frame.

[0010] Optionally, the shaped surface of the main frame is provided with a high-temperature-resistant glue layer.

[0011] Optionally, the support lattice is a wave-shaped support structure.

[0012] To achieve the above-mentioned purposes, the application further provides a manufacturing method for manufacturing the 3D printing composite forming mold, comprising the following steps: The composite base is manufactured by using a thermoplastic composite material 3D printing and rough machining. A corresponding metal universal base is selected from a standard module library according to design and specifications; The composite base after rough machining and the metal universal base are combined and connected by using a connecting piece to manufacture a combined piece; The combined piece is subjected to aging heat treatment according to the aging heat treatment parameters of the used thermoplastic composite material to remove the internal stress of the combined piece; A shaped surface is finished on the top surface of the composite base of the combined piece; wherein the shaped surface is a curved surface; The shaped surface is cleaned, and then a high-temperature-resistant glue layer is uniformly sprayed on the shaped surface area to form a high-temperature-resistant glue layer.

[0013] Optionally, the composite base is manufactured by using a thermoplastic composite material 3D printing and rough machining, comprising the following steps: The composite base blank is printed by using a thermoplastic composite 3D printing device; After the excess amount of the composite base blank lower mold side is detected to be uniform by using a numerical control machining center or a measuring device, the connecting surface of the bottom of the composite base blank is machined flat, and a plurality of second waist-shaped holes are machined to manufacture the composite base.

[0014] Optionally, after the high-temperature-resistant glue layer is formed, the following steps are further included: The surface of the high-temperature-resistant glue layer is measured by using a three-coordinate measuring machine.

[0015] The application can achieve the following beneficial effects: The mold of the present application is used, the composite base is heated and expanded at high temperature, due to the setting of the Z direction limiting structure, the Z direction displacement of the composite base under the working condition of high temperature is limited, so that the composite base can only move relatively in the horizontal direction, thereby ensuring that the forming surface of the mold as a whole will not be warped and deformed due to the difference in thermal expansion in all directions, and the forming quality of the product during use of the mold is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the specific embodiments or prior art of the present application, the drawings needed to be used in the description of the specific embodiments or prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0017] Figure 1 FIG. 1 is a structural schematic diagram of a 3D printing composite forming mold in an embodiment of the present application; Figure 2 FIG. 2 is a schematic diagram of the internal structure of a composite base in an embodiment of the present application; Figure 3 FIG. 3 is a structural schematic diagram of a base in an embodiment of the present application.

[0018] Reference signs: 100-composite base, 110-main body frame, 111-second waist-shaped hole, 120-supporting lattice, 200-base, 210-square steel skeleton, 220-reference block, 230-reference plate, 231-first waist-shaped hole, 300-connection piece, 400-high-temperature-resistant gel coat layer.

[0019] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0022] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like shall be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] In addition, if the present application has a description involving "first", "second" and the like, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection claimed in the present application.

[0024] Embodiment 1 Referring to Figures 1-3 The present embodiment provides a 3D printing composite forming mold, comprising a composite base 100, a base 200 and a Z-direction limiting structure: the top surface of the composite base 100 is a forming surface; the base 200 is connected to the bottom of the composite base 100; the Z-direction limiting structure is arranged between the composite base 100 and the base 200, and the Z-direction limiting structure is used to limit the Z-direction displacement of the composite base 100 under high temperature working condition.

[0025] In the prior art, for example, in the patent entitled "A multi-surface 3D printing composite material forming mold manufacturing method", after printing the mold roughcast using 3D printing technology, the finished mold is obtained by CNC finishing, and a special lattice corresponding to the surface is designed to provide support for the multi-surface mold. The mold surface and the support lattice are combined by one or more methods such as cementation, metal bolts, mortise and tenon structure, 3D printing, etc. Such mold only needs to be printed by thermoplastic composite 3D printing plus simple machining and connection process, but the anisotropy of the thermal expansion coefficient of the thermoplastic composite 3D printing material is obvious. The composite forming mold manufactured by using the process has relatively weak rigidity. The mold has large difference in thermal expansion amount in each direction under high temperature working condition, which produces internal stress. In addition, the overall rigidity of the mold is relatively weak, which is prone to warping deformation, thereby affecting the part forming precision and forming effect.

[0026] Therefore, in the embodiment, in use, the composite substrate 100 is heated and expanded at high temperature, due to the arrangement of the Z-direction limiting structure, the Z-direction displacement (i.e. vertical displacement) of the composite substrate 100 under high temperature working condition is limited, so that the composite substrate 100 can only move relatively in the horizontal direction, thereby ensuring that the overall forming surface of the mold will not be warped and deformed due to the difference in thermal expansion amount in each direction, and the forming quality of the product in use of the mold is improved.

[0027] It should be noted that the composite substrate 100 is a thermoplastic composite 3D printing substrate.

[0028] As an optional implementation, the Z-direction limiting structure includes a plurality of first waist-shaped holes 231, a plurality of second waist-shaped holes 111 and a plurality of connecting pieces 300, the plurality of first waist-shaped holes 231 are arranged on the base 200; the plurality of second waist-shaped holes 111 are arranged on the bottom of the composite substrate 100, and the positions of the second waist-shaped holes 111 and the first waist-shaped holes 231 correspond one by one; the connecting pieces 300 pass through the center positions of the first waist-shaped holes 231 and the corresponding second waist-shaped holes 111 to connect the base 200 to the bottom of the composite substrate 100.

[0029] In the embodiment, the first waist-shaped holes 231 and the second waist-shaped holes 111 not only play a role in connecting the base 200 and the composite substrate 100 together through the connecting pieces 300 (screws can be used), but also, due to the certain length of the first waist-shaped holes 231 and the second waist-shaped holes 111, when the composite substrate 100 is heated and expanded at high temperature, the relative movement of the composite substrate 100 in the horizontal direction is released, and at the same time, the Z-direction displacement of the composite substrate 100 is limited through the connecting pieces 300, finally realizing the effect that the overall forming surface will not be warped and deformed due to the difference in thermal expansion amount in each direction.

[0030] As an optional implementation, the center positions of the second waist-shaped holes 111 and the first waist-shaped holes 231 correspond to each other, and the length directions of the second waist-shaped holes 111 and the first waist-shaped holes 231 are perpendicular to each other. Therefore, when the composite substrate 100 is heated and expanded, according to the local or overall stress direction, the composite substrate 100 can have the ability to displace in the horizontal direction towards the X direction and / or the Y direction, thereby better adapting to the stress change, especially the local stress change, i.e. adapting to the thermal expansion coefficient anisotropy of the thermoplastic composite 3D printing material, thereby reducing the large deformation of the 3D printing mold in use and improving the product forming precision.

[0031] It should be noted that the first waist-shaped holes 231 are arranged in multiple along the length direction of each of the X direction and the Y direction, further improving the connection stability and the stability of the horizontal displacement of the composite substrate 100.

[0032] As an optional embodiment, the base 200 comprises a square steel framework 210, a plurality of reference blocks 220 and a reference plate 230; the plurality of reference blocks 220 are connected to the bottom of the square steel framework 210; the reference plate 230 is connected to the top surface of the square steel framework 210, and a plurality of first waist-shaped holes 231 are formed through the reference plate 230.

[0033] In the embodiment, the square steel framework 210 is a typical welded structure, as the main structure of the base 200, the reference blocks 220 are metal numerical control parts, welded below the square steel framework 210, and through numerical control processing, it is ensured that the base 200 can be placed flat on the ground, and the reference plate 230 is a metal flat part, after full welding with the square steel framework 210, the whole is processed flat to ensure that the composite base body 100 can be placed flat on the reference plate 230. The first waist-shaped holes 231 in the X and Y directions are formed on the reference plate 230 at intervals, and the second waist-shaped holes 111 are also arranged at the same positions on the bottom of the composite base body 100, and the connecting pieces 300 such as bolts are used to pull tight, so as to realize the connection between the base 200 and the composite base body 100.

[0034] It should be noted that the base 200 can be designed as a series of standard modules to form a metal universal base 200 to meet the support requirements of one or more composite base bodies 100 of different sizes. As an optional embodiment, the composite base body 100 comprises a main frame 110 and a support lattice 120, the top surface of the main frame 110 is a shaped surface, and a plurality of second waist-shaped holes 111 are formed on the bottom of the main frame 110; the support lattice 120 is arranged in the main frame 110.

[0035] In the embodiment, the main frame 110 is a whole square box structure, the top surface of which is consistent with the curved surface of the required shaped cover part, as a shaped surface, the other three surfaces are mutually perpendicular planes, which are convenient for mold laying and processing, and the support lattice 120 mainly plays a supporting and rigidifying role, and the support lattice 120 and the main frame 110 are usually integrally formed by 3D printing (the printing start and end positions are as shown in Figure 2

[0036] As an optional embodiment, the shaped surface of the main frame 110 is provided with a high-temperature-resistant glue layer 400, which is a continuous and dense surface reinforcing coating with a uniform thickness of 1 mm. The high-temperature-resistant glue layer 400 is formed on the shaped surface of the main frame 110 by high-temperature spraying and curing to form an integral reinforcing coating, so as to ensure the air tightness of the mold shaped surface.

[0037] As an optional embodiment, the support lattice 120 is a wave-shaped support structure, which plays a good supporting and rigidifying role in the middle part of the main frame 110, so as to reduce the deformation risk of the shaped surface. ​

[0038] In summary, the mold of the present application has the advantages that: the 3D printing thermoplastic composite base combined with the metal general base improves the overall rigidity of the 3D printing thermoplastic composite cover forming mold, limits the displacement in the Z direction, reduces the deformation of the mold during use, and solves the problem of poor forming effect of the existing 3D printing thermoplastic composite mold product.

[0039] Embodiment 2 To achieve the above-mentioned purpose, the embodiment also provides a design method for designing the 3D printing composite forming mold. Step S1: Reference plane creation: extract the maximum part shape boundary, and select the maximum contour point position to create a reference plane, usually select four contour points at the corners; Step S2: 3D printing composite base (i.e. 3D printing thermoplastic composite base) surface segmentation surface creation: extract the part mold surface, and through the CATIA curved surface modeling extension command, enlarge the part mold surface shape, usually extend 150~200mm along the maximum shape, and offset 1mm along the normal direction of the part mold surface as the surface segmentation surface after extension; Step S3: 3D printing composite base maximum shape contour creation: take the reference plane generated in step S1 as the sketch plane, draw the mold expansion size sketch Figure 1 , the sketch Figure 1 is a rectangular boundary, the length and width directions are respectively about 120mm of the maximum part shape, and the sketch Figure 1 rectangular boundary is rounded to an integer; Step S4: 3D printing composite base body creation: take the sketch Figure 1 generated in step S3 as the base plane, and stretch the boss on both sides of the base plane to about 300mm; Step S5: 3D printing composite base mold surface creation: use the surface cutting surface generated in step S2 to segment the stretched boss generated in step S4, and the segmentation direction should be the part mold direction; Step S6: 3D printing composite base body shell extraction processing: perform shell extraction processing on the segmented mold body, to avoid high printing height during printing, generally extract the shell along the width direction of the mold, that is, the shell extraction thickness of the upper and lower and left and right side shape contours of the mold body is the single layer width of 3D printing, which is generally 16mm, and after shell extraction, the thickness of the inside of the mold surface side is reduced by 4mm, and in actual printing manufacturing, the surface side curved surface is thickened by 4mm, which is consistent with the thickness of the remaining position, and the thickening of 4mm here is the machining allowance after printing is completed; Step S7: 3D Printing Composite Matrix Reinforcement: Divide the mold cavity after shelling into several equal-spaced frames of approximately 300mm along the mold length. Reinforce each frame, ensuring all frame ribs are continuous. The general principle of reinforcement is that, except for the printing start and end points, the contact points between the reinforcing ribs and the outer frame are designed to be linear to reduce internal stress during printing. The printing start and end points are the starting and ending points of each layer. The printing start and end points should include all elements on the printing cross-section of each layer, and the start and end points can be interchanged, i.e., the starting point of the nth layer is the ending point of the (n+1)th layer, to ensure continuous printing and improve printing efficiency. Step S8: Selection of universal metal base: Based on the maximum shape of the mold generated in step S3, select a universal metal base with a basically matching shape. The general principle for selection is that the maximum shape of the universal metal base should be greater than or equal to the maximum shape of the mold generated in step S3. Step S9: Assemble the 3D printed composite substrate with the universal metal base: Assemble the 3D printed composite substrate and the universal metal base together using the assembly command. The general principle is to keep the position of the 3D printed composite substrate unchanged in the initial modeling coordinate system. Move the universal metal base so that the upper surface of the reference plate of the universal metal base fits against the 3D printed composite substrate. The 3D printed composite substrate is placed in the center on the universal metal base. Step S10: 3D printing composite substrate connection hole creation: Using the connection hole position (i.e. the first waist-shaped hole) on the metal universal base as the opening reference, keep the opening center position consistent, so that the second waist-shaped hole of the 3D printing composite substrate intersects and is perpendicular to the length direction of the first waist-shaped hole on the metal universal base, thus completing the 3D printing composite substrate design. Step S11: High-temperature resistant gel coat layer shape design: based on the grass generated in step S3 Figure 1 The sheet body is stretched to the rectangular boundary and then offset inward by 30mm to form the outer cutting surface of the high-temperature gel coat. Step S12: Cutting the high-temperature resistant gelcoat sheet: Cut the surface segmentation surface obtained in step S2 using the outer cutting surface of the high-temperature resistant gelcoat, and retain the inner curved surface sheet of the cutting surface, which is the high-temperature resistant gelcoat sheet. Step S13: Based on the high-temperature resistant gelcoat sheet, use the thick surface function of the modeling tool to thicken the inner side of the tooling molding surface by 1mm to complete the design of the high-temperature resistant gelcoat layer.

[0040] Example 3 Reference Figures 1-3 To achieve the above objectives, this embodiment also provides a manufacturing method for manufacturing the aforementioned 3D printing composite molding die, comprising the following steps: A composite matrix 100 blank was 3D printed using thermoplastic composite material and then rough-machined to obtain the composite matrix 100. Select the corresponding metal universal base 200 from the standard module library according to the design specification; Combine and connect the rough machined composite base 100 and the metal universal base 200 using the connector 300 to obtain an assembly; Age heat treat the assembly according to the aging heat treatment parameters of the thermoplastic composite material used to remove the stress in the assembly; Finish the top surface of the composite base 100 of the assembly to form a shaped surface; wherein the shaped surface is a curved surface; Clean the shaped surface, and then uniformly spray a high-temperature resistant gel coat on the shaped surface area to form a high-temperature resistant gel coat layer 400.

[0041] In this embodiment, the mold is combined with the composite base 100 made by the thermoplastic composite 3D printing process and the metal universal base 200, which is light in weight and convenient to use; the metal universal base 200 is a series of standard modules, which can realize pre-material preparation; the composite base 100 is made by the thermoplastic composite 3D printing process, which has a shorter overall manufacturing cycle and can meet the rapid manufacturing requirements of the composite mold in the composite cover manufacturing process.

[0042] As an optional embodiment, a composite base 100 blank is 3D printed using a thermoplastic composite material, and is rough machined to obtain a composite base 100, including the following steps: A composite base 100 blank is printed using a thermoplastic composite 3D printing device; After detecting that the excess amount of the bottom side of the composite base 100 blank is uniform using a numerical control machining center or a measuring device, the connecting surface at the bottom of the composite base 100 blank is machined flat, and a plurality of second waist-shaped holes 111 are machined to obtain a composite base 100.

[0043] As an optional embodiment, after forming the high-temperature resistant gel coat layer 400, the following steps are further included: The surface of the high-temperature resistant gel coat layer 400 is measured using a three-coordinate measuring machine.

[0044] The surface of the high-temperature resistant gel coat layer 400 is detected by the three-coordinate measuring machine to detect whether the curved surface curvature meets the standard, thereby indirectly detecting whether the thickness uniformity of the high-temperature resistant gel coat layer 400 meets the qualified standard. The above is only a preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A 3D printing composite molding die, characterized in that, include: The composite substrate has a top surface that is a molding surface. A base, the base being connected to the bottom of the composite substrate; A Z-direction limiting structure is disposed between the composite substrate and the base, and the Z-direction limiting structure is used to limit the Z-direction displacement of the composite substrate under high temperature conditions.

2. The 3D printing composite molding die as described in claim 1, characterized in that, The Z-axis confinement structure includes: Multiple first oblong holes are formed on the base; Multiple second waist-shaped holes are formed at the bottom of the composite substrate, and the positions of the second waist-shaped holes correspond one-to-one with the positions of the first waist-shaped holes. Multiple connectors, which pass through the center of the first waist-shaped hole and the corresponding second waist-shaped hole, to connect the base to the bottom of the composite substrate.

3. The 3D printing composite molding die as described in claim 2, characterized in that, The center positions of the second waist-shaped hole and the first waist-shaped hole correspond to each other, and the length directions of the second waist-shaped hole and the first waist-shaped hole are perpendicular to each other.

4. A 3D printing composite molding die as described in claim 2 or 3, characterized in that, The base includes: Square steel frame; Multiple reference blocks are connected to the bottom of the square steel frame; A reference plate is connected to the top surface of the square steel frame, and a plurality of the first waist-shaped holes are opened through the reference plate.

5. A 3D printing composite molding die as described in claim 2 or 3, characterized in that, The composite matrix includes: The main frame has a top surface that is a shaped surface, and a plurality of second waist-shaped holes are formed at the bottom of the main frame; A supporting lattice is disposed within the main frame.

6. A 3D printing composite molding die as described in claim 5, characterized in that, The main frame is provided with a high-temperature resistant gel coat layer on its molding surface.

7. A 3D printing composite molding die as described in claim 5, characterized in that, The supporting lattice is a wave-shaped supporting structure.

8. A manufacturing method, characterized in that, The method for manufacturing a 3D printed composite molding mold as described in any one of claims 2-7 includes the following steps: A composite matrix blank is 3D printed using thermoplastic composite materials and then rough-machined to obtain the composite matrix. Select the corresponding universal metal base from the standard module library according to the design specifications; The rough-machined composite substrate is combined with the general-purpose metal base using connectors to obtain an assembly; The assembly is subjected to aging heat treatment according to the aging heat treatment parameters of the thermoplastic composite material used, in order to remove the internal stress of the assembly; A molding surface is precision machined on the top surface of the composite substrate of the assembly; wherein the molding surface is a curved surface; Clean the molding surface thoroughly, and then evenly spray a high-temperature resistant gel coat onto the molding surface area to form a high-temperature resistant gel coat layer.

9. A manufacturing method as described in claim 8, characterized in that, The process of 3D printing a composite matrix blank using thermoplastic composite material and then performing rough machining to obtain the composite matrix includes the following steps: A composite matrix blank was printed using a thermoplastic composite 3D printing device; After using a CNC machining center or measuring equipment to check that the allowance on the lower die side of the composite substrate blank is uniform, the connecting surface at the bottom of the composite substrate blank is machined flat, and multiple second waist-shaped holes are machined to obtain the composite substrate.

10. A manufacturing method as described in claim 8, characterized in that, After forming the high-temperature resistant gel coat layer, the following steps are also included: The surface of the high-temperature resistant gel coat layer was measured using a coordinate measuring machine.

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