Winding die for composite material barrel with inner reinforcing ribs and using method

Abstract

The invention provides a winding die for a composite material barrel with inner reinforcing ribs and a using method, and belongs to the technical field of carbon fiber reinforced composite material forming. The problems that in the demolding process of a mold of a composite material barrel internally provided with circumferential annular reinforcing ribs, the mold axially moves to interfere with the internal reinforcing ribs, and demolding of the mold is difficult are solved. The mold comprises a mandrel, a mold assembly, a front seal head and a rear seal head, the mold assembly is fixed on the mandrel and is of a rotary body structure, and the front seal head and the rear seal head are fixed on the mandrel and are fixedly connected to the front end and the rear end of the mold assembly respectively; the mold assembly is of a split structure and is formed by assembling a first mold and a second mold, an annular groove distributed in the circumferential direction can be formed in the assembling position after the first mold and the second mold are assembled, and the first mold and the second mold do not interfere with the space in the annular groove during demolding. The manufacturing method is mainly used for manufacturing the composite material cylinder with the circumferential annular reinforcing ribs inside.

Description

Technical Field

[0001] The invention belongs to the technical field of carbon fiber reinforced composite material molding, and in particular relates to a winding mold for a composite material cylinder with internal reinforcing ribs and a use method thereof. Background Art

[0002] Compared with traditional metal materials, carbon fiber composites have the advantages of high specific strength, specific modulus and specific stiffness, fatigue resistance, strong designability and corrosion resistance. Carbon fiber reinforced composites using long fiber winding molding technology are becoming more and more widely used, and it is very common to add reinforcing ribs to carbon fiber reinforced composites to strengthen the structure locally.

[0003] For a mold of a composite cylinder with circumferential annular reinforcement ribs inside, the axial movement of the mold will interfere with the internal reinforcement ribs during demoulding, and the mold cannot be demoulded directly from both sides axially, making it difficult to demould the mold. Summary of the invention

[0004] In view of this, in order to solve the problem that the axial movement of the mold for a composite material cylinder with circumferential annular reinforcement ribs inside will interfere with the internal reinforcement ribs during demoulding, and the mold cannot be demoulded directly from both sides axially, making it difficult to demould the mold. The present invention proposes a winding mold for a composite material cylinder with internal reinforcement ribs and a method for using the mold. The mold is divided into two parts with the internal reinforcement ribs of the cylinder as a dividing line. The two parts are assembled to form a mold with a groove that matches the shape of the cylinder reinforcement ribs. When demoulding, the molds on both sides of the reinforcement ribs are pulled out along the axial direction of the cylinder respectively, and will not interfere with the reinforcement ribs, making it easy to demould the mold.

[0005] To achieve the above object, the present invention adopts the following technical scheme: a winding die for a composite material cylinder with internal reinforcing ribs, comprising a mandrel, a mold assembly, a front head and a rear head, wherein the mold assembly is fixed on the mandrel as a rotating body structure, and the front head and the rear head are fixed on the mandrel and are respectively fixedly connected to the front and rear ends of the mold assembly;

[0006] The mold assembly is a split structure, which is formed by assembling a first mold and a second mold. After the first mold and the second mold are assembled, an annular groove distributed along the circumferential direction is formed at the assembly point. When the first mold and the second mold are demolded, they do not interfere with the space in the annular groove.

[0007] Furthermore, the circumferential surface contour of the mold assembly is cylindrical on one side and cylindrical with a gradually narrowing opening on the other side, and the annular groove is located in the cylindrical area.

[0008] Furthermore, the second mold is trumpet-shaped, including a wide-mouth side and a narrow-mouth side, and the second mold is composed of a second mold side wall connected to a second mold bottom wall, and the second mold bottom wall is located on the narrow-mouth side of the second mold.

[0009] Furthermore, one side of the second mold side wall is fitted with the first mold, and the other side is fitted with the second mold bottom wall. The second mold bottom wall is fixedly connected to the first mold, and the second mold side wall is clamped and fixed to the first mold from the axial direction.

[0010] Furthermore, the side wall of the second mold is a petal-type structure, and the side wall of the second mold is formed by a plurality of petals one and a plurality of petals two arranged and connected in a circumferentially staggered manner. The bottom wall of the second mold is a planar assembly structure with an opening in the center. The bottom wall of the second mold is formed by a plurality of assembly blocks one and a plurality of assembly blocks two arranged and connected in a circumferentially staggered manner in the same plane. The second mold can be demoulded from its bottom area, and each component can be removed in turn.

[0011] Furthermore, an axial positioning surface three and a radial positioning surface four are provided at the edge of the wide mouth side of the second mold, an axial positioning surface four is provided on the bottom wall of the second mold, and radial positioning surfaces five and six are provided at the opening. The surface of the first mold is correspondingly provided with an axial positioning surface one, an axial positioning surface two, a radial positioning surface one, a radial positioning surface two and a radial positioning surface three. When the first mold and the second mold are assembled, the axial positioning surface one is fitted with the axial positioning surface three, the axial positioning surface two and the axial positioning surface four are located in the same plane, the radial positioning surface one is fitted with the radial positioning surface four, the radial positioning surface two is fitted with the radial positioning surface five, and the radial positioning surface three is fitted with the radial positioning surface six, thereby completing the axial and radial assembly positioning between the first mold and the second mold.

[0012] Furthermore, the first axial positioning surface is provided with a guide positioning groove, and the third axial positioning surface is provided with a plurality of guide positioning blocks, and the guide positioning groove fits with the guide positioning blocks.

[0013] Furthermore, the arc length of one end of the second petal that is in contact with the bottom wall of the second mold is greater than that of the other end, and the arc length of one end of the first petal that is in contact with the bottom wall of the second mold is less than that of the other end. When the second mold is demolded, the second petal is removed first and then the first petal.

[0014] Furthermore, the number of the petal one, the petal two, the assembling block one and the assembling block two are six and they correspond one to one. The petal one is fixed to the assembling block one, and the petal two is fixed to the assembling block two.

[0015] A method for using a winding die for a composite material cylinder with internal reinforcing ribs,

[0016] S1: Installing the mold: inserting the first mold and the second mold into the mandrel from both sides or from one side in sequence for assembly and fixing to form a mold assembly with an annular groove, inserting the front head and the rear head into the mandrel from both sides respectively, connecting with the mold assembly and fixing with the mandrel, and obtaining a winding mold of a composite material cylinder with internal reinforcing ribs;

[0017] S2: preparing a composite material cylinder with internal reinforcement ribs: clamping the assembled winding mold onto a winding machine, firstly preparing product reinforcement ribs in the annular groove area by an annular winding method, and then preparing the product cylinder on the surface of the winding mold by an annular winding method and a longitudinal winding method, to obtain a composite material cylinder with internal reinforcement ribs;

[0018] S3: Demolding: Remove the front head and the rear head from both sides of the product along the mandrel, and then remove the mandrel, the first mold and the second mold from both sides or one side of the product to achieve product demoulding.

[0019] Compared with the prior art, the winding die and the use method of the composite material cylinder with internal reinforcing ribs described in the present invention have the following beneficial effects:

[0020] 1. The present invention can use a demoulding method to produce a composite material cylinder with circumferential annular reinforcement ribs inside, and the mold demoulding is convenient.

[0021] 2. The present invention designs one side of the mold as a split structure, and part of the mold structure can be removed from a narrow outlet. The demoulding method can be used to produce a composite material cylinder with circumferential annular reinforcement ribs inside and a gradually shrinking opening on one side, which is particularly suitable for demoulding molds with asymmetric structures.

[0022] 3. The present invention is provided with a plurality of axial and radial positioning surfaces, and the positioning between components is accurate.

[0023] 4. The present invention is provided with a guide positioning groove to assist the disassembly and assembly of the petals, thereby further improving the convenience of disassembly and assembly of the mold and the positioning accuracy between the components. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is a structural schematic diagram of a winding mold of a composite material cylinder with internal reinforcing ribs according to the present invention;

[0026] Figure 2 It is a front view of the mold assembly of the present invention;

[0027] Figure 3 For the present invention Figure 2 A partial enlarged view of the middle A;

[0028] Figure 4 The structure of the second mold of the present invention is shown in FIG. Figure 1 ;

[0029] Figure 5 It is a first exploded schematic diagram of the mold assembly of the present invention;

[0030] Figure 6 It is a schematic structural diagram of the second mold side wall and the second mold bottom wall of the present invention;

[0031] Figure 7 It is a right side view of the second mold side wall and the second mold bottom wall of the present invention;

[0032] Figure 8 The structure of the second mold of the present invention is shown in FIG. Figure 2 ;

[0033] Fig. 9 For the present invention Figure 8 A partial enlarged view of point B in the middle;

[0034] Fig.10 is a front view of the first mold of the present invention;

[0035] Fig.11 For the present invention Fig.10 A partial enlarged view of point C in the middle;

[0036] Fig.12 For the present invention Fig.10 A partial enlarged view of point D in the middle;

[0037] Fig.13 is a front view of the second mold of the present invention;

[0038] Fig.14 The structure of the first mold of the present invention is shown in FIG. Figure 1 ;

[0039] Fig.15 The present invention Fig.14 A partial enlarged view of point E in the middle;

[0040] Fig.16 The structure of the second mold of the present invention is schematically shown Figure 3 ;

[0041] Fig.17 The present invention Fig.16 A partial enlarged view of point F in the middle;

[0042] Fig.18 is a cross-sectional view of the first mold of the present invention;

[0043] Fig.19 The present invention Fig.18 A partial enlarged view of the G in the middle;

[0044] Fig. 20 A cross-sectional view of the second mold of the present invention;

[0045] In the figure: 1- mandrel; 2- mold assembly; 3- front head; 4- rear head; 5- first mold; 6- second mold; 7- annular groove;

[0046] 61 - side wall of the second mold; 62 - bottom wall of the second mold;

[0047] 611-petal one; 612-petal two; 621-assembly block one; 622-assembly block two; 623-opening;

[0048] 1A-axial positioning surface one; 2A-axial positioning surface two; 3A-radial positioning surface one; 4A-radial positioning surface two; 5A-radial positioning surface three; 6A-guide positioning groove;

[0049] 1B- axial positioning surface three; 2B- axial positioning surface four; 3B- radial positioning surface four; 4B- radial positioning surface five; 5B- radial positioning surface six; 6B- guide positioning block. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0051] 1. Specific implementation method 1, see Figure 1-20 The present embodiment is described as follows: a winding die for a composite material cylinder with internal reinforcement ribs comprises a mandrel 1, a mold assembly 2, a front end cap 3 and a rear end cap 4. The mold assembly 2 is fixed on the mandrel 1 as a rotating body structure. The front end cap 3 and the rear end cap 4 are fixed on the mandrel 1 and are respectively fixedly connected to the front and rear ends of the mold assembly 2.

[0052] The mold assembly 2 is a split structure, which is formed by assembling a first mold 5 and a second mold 6. After the first mold 5 and the second mold 6 are assembled, an annular groove 7 distributed along the circumferential direction will be formed at the assembly point. When the first mold 5 and the second mold 6 are demolded, they will not interfere with the space inside the annular groove 7.

[0053] The mold assembly 2 of the present invention adopts a split structure, which allows the mold to be separated smoothly during demoulding without interfering with the space in the annular groove 7. This design is particularly suitable for composite cylinders with complex internal reinforcing rib structures, and can effectively avoid damage to the composite structure during demoulding.

[0054] The annular groove 7 formed after the first mold 5 and the second mold 6 are assembled provides a space for winding and preparing the inner reinforcing rib. This design not only simplifies the manufacturing and assembly process of the mold, but also ensures that the composite material is evenly distributed during the winding process, avoiding uneven material distribution or defects caused by complex structures.

[0055] The front head 3 and the rear head 4 enhance the overall stability of the mold from both sides, and can also provide better support during the winding process to prevent the mold from deforming or shifting, thereby improving the molding quality. The core shaft 1 of the present invention can be processed into structures with different shaft diameters to limit the components axially.

[0056] The circumferential surface profile of the mold assembly 2 of the present application is cylindrical on one side and cylindrical with a gradually narrowing opening on the other side, and the annular groove 7 is located in the cylindrical area, so as to adapt to the structure design of products of different shapes.

[0057] The second mold 6 of the present application is trumpet-shaped, including a wide mouth side and a narrow mouth side. The second mold 6 is composed of a second mold side wall 61 connected to a second mold bottom wall 62, and the second mold bottom wall 62 is located on the narrow mouth side of the second mold 6. The second mold 6 is designed to be trumpet-shaped to adapt to the shape of the product, and the bottom surface increases the contact area with the head, thereby improving the stability of the head clamping and fixing.

[0058] In the present application, one side of the second mold side wall 61 is in contact with the first mold 5 , and the other side is in contact with the second mold bottom wall 62 . The second mold bottom wall 62 is fixedly connected to the first mold 5 , clamping and fixing the second mold side wall 61 and the first mold 5 axially.

[0059] The second mold side wall 61 of the present application is a petal-type structure, and the second mold side wall 61 is formed by a plurality of petals 1 611 and a plurality of petals 2 612 arranged and connected in a staggered manner along the circumferential direction. The second mold bottom wall 62 is a planar assembly structure with an opening 623 at the center. The second mold bottom wall 62 is formed by a plurality of assembly blocks 1 621 and a plurality of assembly blocks 2 622 assembled and assembled in a staggered manner along the circumferential direction in the same plane. The second mold 6 can be demoulded from its bottom area, and each component can be removed in turn.

[0060] For a component that shrinks on one side and has an annular reinforcement rib inside, the annular reinforcement rib produces a demolding limit in one axial direction on the mold, and cooperates with the shrinkage port to produce a complete limit in both axial directions of the mold. At this time, if the mold between the reinforcement rib and the shrinkage port is an integral structure, it cannot be demolded. Therefore, the present invention divides the mold at this position into multiple parts, removes some mold components from the shrinkage port in turn, and gradually reduces the total volume of the mold in this area. When the total volume of the mold in this area is reduced to a level that can pass through the annular reinforcement rib without interference, the remaining mold is removed axially from the non-shrinking side of the product, thereby achieving smooth demolding of the component product that shrinks on one side and has an annular reinforcement rib inside.

[0061] In the present application, an axial positioning surface three 1B and a radial positioning surface four 3B are provided at the edge of the wide mouth side of the second mold 6, an axial positioning surface four 2B is provided at the bottom wall 62 of the second mold, and a radial positioning surface five 4B and a radial positioning surface six 5B are provided at the opening 623. The surface of the first mold 5 is correspondingly provided with an axial positioning surface one 1A, an axial positioning surface two 2A, a radial positioning surface one 3A, a radial positioning surface two 4A and a radial positioning surface three 5A. When the first mold 5 and the second mold 6 are assembled, the axial positioning surface one 1A is in contact with the axial positioning surface three 1B, the axial positioning surface two 2A and the axial positioning surface four 2B are located in the same plane, the radial positioning surface one 3A is in contact with the radial positioning surface four 3B, the radial positioning surface two 4A is in contact with the radial positioning surface five 4B, and the radial positioning surface three 5A is in contact with the radial positioning surface six 5B, thereby completing the axial and radial assembly and positioning between the first mold 5 and the second mold 6.

[0062] The present invention is provided with a plurality of pairs of matching axial and radial positioning surfaces on the first mold 5 and the second mold 6. The axial and radial positioning surfaces can accurately control the position of the mold in the axial direction, ensure that the various parts of the mold are aligned in the radial direction, avoid axial misalignment and radial eccentricity caused by assembly errors, ensure the overall dimensional accuracy of the mold, and thus ensure the geometric accuracy and symmetry of the molded product. During the winding or molding process, the mold may be subjected to axial force. The axial positioning surface can effectively prevent the displacement of the mold in the axial direction and ensure the stability of the molding process. The radial positioning surface can enhance the support of the mold in the radial direction, prevent the mold from deforming when subjected to force, and improve the overall rigidity of the mold.

[0063] The axial positioning surface 1A described in the present application is provided with a guide positioning groove 6A, and the axial positioning surface 3 1B is provided with a plurality of guide positioning blocks 6B, and the guide positioning groove 6A is matched with the guide positioning block 6B. The guide positioning groove 6A is an annular groove, and its cooperation with the guide positioning block 6B can further improve the accuracy and convenience of positioning during the mold assembly process. This structure has the advantages of accurate radial positioning, no circumferential interference, and low processing cost.

[0064] The arc length of one end of the petal 2 612 described in the present application that fits with the bottom wall 62 of the second mold is greater than the arc length of the other end, and the arc length of one end of the petal 1 611 that fits with the bottom wall 62 of the second mold is less than the arc length of the other end. When the second mold 6 is demolded, the petal 2 612 is removed first and then the petal 1 611 is removed. When the petals are removed, axial and radial movement will occur. If the petals are all shrinkage structures in the same direction as the product's shrinkage, interference will occur between the petals and they cannot be removed. Therefore, the shape of the petals is designed, and the shape of petal two 612 is designed to diverge in the direction of product shrinkage. Because the product has a trumpet-shaped appearance, the shape of petal one 611 needs to be opposite to the divergence direction of petal two 612. The two can cooperate to form a trumpet-shaped contour. During assembly, petal one 611 is positioned through axial and radial positioning surfaces and guide positioning grooves, and petal 2 is positioned using the already positioned petal 1. After positioning, each petal is fastened with screws. This structure ensures the end face positioning accuracy and reduces the space occupied by the positioning structure. During dismantling, petal two 612 is removed first. After petal two 612 is removed, some space will be generated between petal one 611, and it can then be removed smoothly.

[0065] The petal 1 611, petal 2 612, assembly block 1 621 and assembly block 2 622 described in the present application are all six and correspond to each other. Petal 1 611 is fixed to assembly block 1 621, and petal 2 612 is fixed to assembly block 2 622. The fixing method of the present invention is bolt fixing or other mechanical fixing methods.

[0066] This embodiment is a method for using the winding mold of the composite material cylinder with internal reinforcement ribs, specifically:

[0067] S1: Installing the mold: inserting the first mold 5 and the second mold 6 into the mandrel 1 from both sides or from one side in sequence for assembly and fixing to form a mold assembly 2 with an annular groove 7, inserting the front head 3 and the rear head 4 into the mandrel 1 from both sides respectively, connecting with the mold assembly 2 and fixing to the mandrel 1, and obtaining a winding mold for a composite material cylinder with internal reinforcement ribs;

[0068] S2: preparing a composite material cylinder with inner reinforcement ribs: clamping the assembled winding mold onto a winding machine, firstly preparing product reinforcement ribs in the annular groove 7 area by an annular winding method, and then preparing a product cylinder on the surface of the winding mold by an annular winding method and a longitudinal winding method, to obtain a composite material cylinder with inner reinforcement ribs;

[0069] S3: Demolding: Remove the front head 3 and the rear head 4 from both sides of the product along the core shaft 1, and then remove the core shaft 1, the first mold 5 and the second mold 6 from the openings on both sides or one side of the product to achieve product demoulding.

[0070] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. A winding die for a composite material cylinder with internal reinforcing ribs, characterized in that: It comprises a core shaft (1), a mold assembly (2), a front end cover (3) and a rear end cover (4); the mold assembly (2) is fixed on the core shaft (1) and is a rotating body structure; the front end cover (3) and the rear end cover (4) are fixed on the core shaft (1) and are respectively fixedly connected to the front and rear ends of the mold assembly (2); The mold assembly (2) is a split structure, formed by assembling a first mold (5) and a second mold (6). After the first mold (5) and the second mold (6) are assembled, an annular groove (7) distributed along the circumferential direction is formed at the assembly point. When the first mold (5) and the second mold (6) are demoulded, they do not interfere with the space inside the annular groove (7).

2. The winding die of the composite material cylinder with internal reinforcement ribs according to claim 1, characterized in that: The circumferential surface profile of the mold assembly (2) is cylindrical on one side and cylindrical with a gradually narrowing opening on the other side, and the annular groove (7) is located in the cylindrical area.

3. The winding die of the composite material cylinder with internal reinforcement ribs according to claim 2, characterized in that: The second mold (6) is trumpet-shaped and includes a wide-mouth side and a narrow-mouth side. The second mold (6) is composed of a second mold side wall (61) and a second mold bottom wall (62) connected together, and the second mold bottom wall (62) is located on the narrow-mouth side of the second mold (6).

4. The winding die of the composite material cylinder with internal reinforcement ribs according to claim 3, characterized in that: One side of the second mold side wall (61) is in contact with the first mold (5), and the other side is in contact with the second mold bottom wall (62). The second mold bottom wall (62) is fixedly connected to the first mold (5), clamping and fixing the second mold side wall (61) and the first mold (5) axially.

5. The winding die of the composite material cylinder with internal reinforcement ribs according to claim 4, characterized in that: The second mold side wall (61) is a petal-type structure, and the second mold side wall (61) is formed by a plurality of petal one (611) and a plurality of petal two (612) arranged and connected in a staggered manner along the circumferential direction. The second mold bottom wall (62) is a planar assembly structure with an opening (623) at the center. The second mold bottom wall (62) is formed by a plurality of assembly blocks one (621) and a plurality of assembly blocks two (622) assembled and assembled in a staggered manner in the circumferential direction in the same plane. The second mold (6) can be demoulded from its bottom surface area, and each component can be removed in sequence.

6. The winding die of the composite material cylinder with internal reinforcement ribs according to claim 5, characterized in that: The second mold (6) is provided with an axial positioning surface three (1B) and a radial positioning surface four (3B) at the edge of the wide mouth side, the second mold bottom wall (62) is provided with an axial positioning surface four (2B), the opening (623) is provided with a radial positioning surface five (4B) and a radial positioning surface six (5B), the surface of the first mold (5) is correspondingly provided with an axial positioning surface one (1A), an axial positioning surface two (2A), a radial positioning surface one (3A), a radial positioning surface two (4A) and a radial positioning surface three (5A), the first mold When the first mold (5) and the second mold (6) are assembled, the axial positioning surface one (1A) fits with the axial positioning surface three (1B), the axial positioning surface two (2A) and the axial positioning surface four (2B) are located in the same plane, the radial positioning surface one (3A) fits with the radial positioning surface four (3B), the radial positioning surface two (4A) fits with the radial positioning surface five (4B), and the radial positioning surface three (5A) fits with the radial positioning surface six (5B), thereby completing the axial and radial assembly positioning between the first mold (5) and the second mold (6).

7. The winding die of the composite material cylinder with internal reinforcement ribs according to claim 6, characterized in that: A guide positioning groove (6A) is provided on the axial positioning surface one (1A), and a plurality of guide positioning blocks (6B) are provided on the axial positioning surface three (1B), wherein the guide positioning groove (6A) fits with the guide positioning blocks (6B).

8. The winding die of the composite material cylinder with internal reinforcement ribs according to claim 7, characterized in that: The arc length of one end of the second petal (612) that fits with the bottom wall (62) of the second mold is greater than the arc length of the other end, and the arc length of one end of the first petal (611) that fits with the bottom wall (62) of the second mold is less than the arc length of the other end. When the second mold (6) is demoulded, the second petal (612) is removed first and then the first petal (611) is removed.

9. The winding die of the composite material cylinder with internal reinforcement ribs according to claim 8, characterized in that: There are six of the petal one (611), petal two (612), assembly block one (621) and assembly block two (622) and they correspond one to one. Petal one (611) is fixed to assembly block one (621), and petal two (612) is fixed to assembly block two (622).

10. A method for using a winding mold for a composite material cylinder with internal reinforcement ribs as claimed in any one of claims 1 to 9, characterized in that: S1: Installing the mold: inserting the first mold (5) and the second mold (6) into the mandrel (1) from both sides or from one side in sequence for assembly and fixation to form a mold assembly (2) with an annular groove (7); inserting the front head (3) and the rear head (4) into the mandrel (1) from both sides respectively, connecting with the mold assembly (2) and fixing with the mandrel (1), thereby obtaining a winding mold of a composite material cylinder with internal reinforcing ribs; S2: preparing a composite material cylinder with internal reinforcement ribs: clamping the assembled winding mold onto a winding machine, firstly preparing product reinforcement ribs in the annular groove (7) region by an annular winding method, and then preparing a product cylinder on the surface of the winding mold by an annular winding method and a longitudinal winding method, thereby obtaining a composite material cylinder with internal reinforcement ribs; S3: Demolding: The front end cover (3) and the rear end cover (4) are removed from both sides of the product along the core shaft (1), and then the core shaft (1), the first mold (5) and the second mold (6) are removed from both sides or one side of the product to achieve product demoulding.

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