RTM (Resin Transfer Molding) forming mold for composite material multi-way structural member

Abstract

The invention discloses an RTM forming mold for a composite material multi-way structural member, and belongs to the technical field of composite material forming. According to the mold, the problem that demolding is inconvenient and even cannot be successful due to the fact that an integrally-formed rigid core mold is adopted in an existing mold for RTM forming of the multi-way structural part is solved. Comprising a supporting frame, a base, an outer pressurizing sleeve, a top cover, an inner mold, an outer mold and a plurality of core molds, the base is installed on the supporting frame, the inner mold is installed on the base, an annular groove with an upward opening is formed in the upper portion of the inner mold, the outer side wall of the annular groove is lower than the inner side wall of the annular groove, and a limiting end plate is coaxially, integrally and fixedly arranged at the top end of the inner mold; the core mold comprises a flexible large arm section and a rigid small arm section which are connected end to end, and the outer contour shape of the core mold is arranged according to the contour of the inner wall of a supporting arm pipe of a to-be-formed multi-way structural part. The RTM forming method is used for RTM forming of the composite material multi-way structural component.

Description

Technical Field

[0001] This invention relates to an RTM molding die for multi-channel composite material structural components, belonging to the field of composite material molding technology. Background Technology

[0002] The basic principle of RTM molding is to precisely place a pre-designed fiber reinforcement (such as a preform) inside a mold cavity. The mold is then secured closed with bolts or other sealing mechanisms, forming a sealed cavity. Under precisely controlled conditions, liquid resin is injected into the mold cavity under pressure, ensuring complete impregnation of the fiber reinforcement. Finally, after heat curing and other processes, once the resin has cured, the mold is opened and the molded part is removed. Currently, with the increasing demand for high-performance composite materials, RTM molding technology, due to its unique advantages in manufacturing complex shapes and structures, is finding increasingly widespread application in aerospace, automotive, and shipbuilding industries.

[0003] Multi-pass structural components are subject to significant interlaminar shear forces during use, making them suitable for RTM (Real-Time Molding) manufacturing. However, existing RTM molding dies all employ one-piece rigid mandrels, which are problematic when used for molding multi-pass structural components with irregular shapes (as shown in the attached image). Figure 12 The composite multi-pass structure 100 shown includes a connecting ring 101 and a plurality of support tubes 102 distributed circumferentially along the connecting ring 101. Each support tube 102 includes a main tube 1021 and a small tube 1022 that are connected and fixed end to end. The main tube 1021 and the small tube 1022 are arranged at an angle relative to each other, and the main tube 1021 is connected through the connecting ring 101. This kind of pure rigid core mold has the problem of inconvenient demolding or even failure to demold successfully. Summary of the Invention

[0004] The present invention aims to solve the problem of inconvenient demolding or even failure to demold successfully in existing molds for RTM forming of multi-pass structural components using one-piece rigid core molds, and thus provides an RTM forming mold for composite multi-pass structural components.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: An RTM molding die for a composite multi-channel structural component includes a support frame, a base, an outer pressure sleeve, a top cover, an inner mold, an outer mold, and multiple core molds. The base is mounted on the support frame, and the inner mold is mounted on the base. The upper part of the inner mold has an upward-opening annular groove, and the outer side wall of the annular groove is lower than the inner side wall. The top of the inner mold is coaxially and integrally fixed with a limiting end plate. The outer wall of the inner mold has multiple first arm tube forming grooves along its circumference, and the inner wall of the outer mold has multiple second arm tube forming grooves along its circumference. In the closed state, the multiple first arm tube forming grooves and multiple second arm tube forming grooves are arranged one-to-one to form multiple arm tube forming through holes. Multiple core molds are inserted one-to-one into the multiple arm tube forming through holes, and the outer diameter of the core mold is smaller than the inner diameter of the arm tube forming through hole it is in. The gap between each core mold and the first and second arm tube forming grooves on its outer side serves as an arm tube forming channel. The outer contour of the inner wall of the outer mold and the outer contour of the overall structure formed by the inner mold and the limiting end plate are set to conform to the shape. The annular gap between the upper part of the outer mold and the upper part of the inner mold, together with the annular groove on the upper part of the inner mold, form the connecting ring forming channel. The core mold includes a flexible upper arm segment and a rigid lower arm segment connected end to end, and the outer contour shape of the core mold is set according to the inner wall contour of the support arm tube of the multi-channel structural component to be formed. The outer mold is a split mold, which is wrapped around the inner mold and fixed by several screws. The outer pressure sleeve is fitted around the outer mold and the bottom end of the outer pressure sleeve is fixed to the base by several screws. The top cover is placed on the top of the outer pressure sleeve, the outer mold and the limiting end plate and fixed to the outer pressure sleeve by several screws.

[0006] Furthermore, one end of the rigid forearm segment is an inclined surface and a tapered pin is fixed thereon, and the end of the flexible boom segment near the rigid forearm segment is an inclined surface and a tapered hole is opened thereon, with the tapered pin and the tapered hole engaging and connecting.

[0007] Furthermore, the bottom end of the core mold is mounted on the base via a mounting bracket, wherein the mounting bracket is a cylindrical structure and its outer diameter is larger than the outer diameter of the rigid forearm segment.

[0008] Furthermore, the bottom of the base is provided with multiple first glue injection ports, the same number as the number of support tubes to be formed, and the multiple first glue injection ports are connected to the bottom ends of multiple support tube forming channels. The upper part of the external pressure sleeve is provided with multiple second glue injection ports along its circumference, and each second glue injection port is connected to the connecting ring forming channel. The top cover is provided with multiple glue outlets along its circumference, and each glue outlet is connected to the top end of the connecting ring forming channel.

[0009] Furthermore, multiple guide pins are installed on the base, and multiple guide holes are correspondingly opened at the bottom end of the external pressure sleeve. The guide pin is a split structure, which includes a fixed section, a first connecting section and a second connecting section that are threaded together from bottom to top, wherein the fixed section is fixedly installed on the base.

[0010] Furthermore, the inner mold is a segmented mold, including a central column and multiple inner segmented molds spliced ​​along the circumference of the central column. Each inner segmented mold has a corresponding first arm tube forming groove. The limiting end plate is fixed to the top of the central column. The central column is a stepped cylindrical structure, and the upper part of the central column is a small diameter section. The annular groove is formed between the inner segmented mold and the small diameter section of the central column.

[0011] Furthermore, the outer mold includes multiple outer segmented molds, which are distributed circumferentially between the inner mold and the outer pressure sleeve.

[0012] Furthermore, the flexible boom segment is made of silicone rubber.

[0013] Furthermore, the external pressure sleeve includes a conical cylinder and an integrally formed mounting edge fixed to the bottom end of the conical cylinder, and the mounting edge is fixed to the base by several screws.

[0014] Furthermore, a sealing ring is provided between the external pressure sleeve and the base.

[0015] Compared with the prior art, the present invention has the following advantages: The annular gap between the upper part of the outer mold and the upper part of the inner mold, together with the annular groove on the upper part of the inner mold, form a connecting ring forming channel, which is used to form the connecting ring part of the multi-pass structure.

[0016] The gap between each core mold and the first and second arm tube forming grooves on its outer side serves as an arm tube forming channel for forming the arm tube portion in a multi-pass structure.

[0017] One end of each core mold is conformally joined to the inner wall of the annular groove on the upper part of the inner mold to form the through hole between the support tube and the connecting ring.

[0018] By setting up a support frame, the molding mold can be supported and installed. At the same time, the frame structure facilitates the installation of the injection nozzle and the injection of glue.

[0019] The base facilitates the installation and fixation of the inner mold, outer mold, and outer pressure sleeve.

[0020] The core mold includes a flexible upper arm segment and a rigid lower arm segment connected end to end. That is, the core mold in this invention uses flexible material in some parts, which can achieve smooth demolding when the support arm tube has a bending angle. This effectively solves the problem of inconvenient demolding or even failure to demold in existing one-piece rigid core molds.

[0021] By setting the outer mold as a segmented mold, it is easier to assemble and disassemble the core mold, and also easier to demold.

[0022] The outer mold and inner mold, the outer pressure sleeve and the base, and the top cover and the outer pressure sleeve are all connected by screws, which facilitates connection, fixation and disassembly. Attached Figure Description

[0023] Figure 1 This is a first exploded view of the RTM molding die for the composite multi-pass structure of the present invention; Figure 2 This is a second exploded view of the RTM molding die for the composite multi-pass structural component of the present invention (showing the multi-pass structural component). Figure 3 This is a third exploded view of the RTM molding die for the composite multi-pass structure of the present invention (showing the multi-pass structure). Figure 4 This is a fourth exploded view of the RTM molding die for the composite multi-pass structure of the present invention; Figure 5 This is a three-dimensional structural schematic diagram of the RTM molding die for the composite multi-pass structural component of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the core mold; Figure 7 This is a schematic diagram of the three-dimensional structure of the flexible boom segment; Figure 8 This is a three-dimensional structural diagram of the rigid forearm segment; Figure 9 This is a schematic diagram of the three-dimensional structure of the inner mold (only one inner segmented mold is shown). Figure 10 A three-dimensional structural diagram of a guide pin; Figure 11 A three-dimensional structural diagram of the external pressure sleeve; Figure 12 This is a three-dimensional structural diagram of a multi-channel structural component.

[0024] In the picture: 1. Support frame; 2. Base; 3. External pressure sleeve; 301. Conical cylinder; 302. Mounting outer edge; 4. Top cover; 5. Inner mold; 501. Annular groove; 502. First arm tube forming groove; 503. Central column; 504. Inner segment mold; 6. Outer mold; 7. Core mold; 701. Flexible upper arm section; 702. Rigid lower arm section; 703. Conical pin; 704. Conical hole; 8. Limiting end plate; 9. Mounting seat; 10. First injection port; 11. Second injection port; 13. Guide pin; 131. Fixing section; 132. First connecting section; 133. Second connecting section; 100. Multi-pass structural component; 101. Connecting ring; 102. Arm tube; 1021. Upper arm tube; 1022. Lower arm tube. Detailed Implementation

[0025] Specific implementation method one: Combining Figures 1-12 This description of embodiments provides a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] An RTM molding die for a composite multi-channel structural component includes a support frame 1, a base 2, an outer pressure sleeve 3, a top cover 4, an inner mold 5, an outer mold 6, and multiple core molds 7. The base 2 is mounted on the support frame 1, and the inner mold 5 is mounted on the base 2. The upper part of the inner mold 5 has an upward-opening annular groove 501, and the outer side wall of the annular groove 501 is lower than the inner side wall. The top of the inner mold 5 is coaxially and integrally fixed with a limiting end plate 8. The outer wall of the inner mold 5 has multiple first arm tube forming grooves 502 along its circumference, and the inner wall of the outer mold 6 has multiple second arm tube forming grooves along its circumference. In the closed state, the multiple first arm tube forming grooves 502 and the multiple second arm tube forming grooves are arranged one-to-one to form multiple arm tube forming through holes. Multiple core molds 7 are inserted one-to-one into the multiple arm tube forming through holes, and the outer diameter of the core mold 7 is smaller than the inner diameter of the arm tube forming through hole it is in. The gap between each core mold 7 and the first arm tube forming groove 502 and the second arm tube forming groove on its outer side serves as an arm tube forming channel. The outer contour of the inner wall of the outer mold 6, together with the outer contour of the inner mold 5 and the limiting end plate 8, is set to conform to the shape of the overall structure. The annular gap between the upper part of the outer mold 6 and the upper part of the inner mold 5, and the annular groove 501 on the upper part of the inner mold 5 together form the forming channel of the connecting ring 101. The core mold 7 includes a flexible upper arm segment 701 and a rigid lower arm segment 702 connected end to end, and the outer contour shape of the core mold 7 is set according to the inner wall contour of the support arm tube 102 of the multi-channel structural component 100 to be formed. The outer mold 6 is a split mold. The outer mold 6 is wrapped around the inner mold 5 and fixed by several screws. The outer pressure sleeve 3 is sleeved around the outer mold 6 and the bottom end of the outer pressure sleeve 3 is fixed to the base 2 by several screws. The top cover 4 is covered on the top of the outer pressure sleeve 3, the outer mold 6 and the limiting end plate 8 and fixed to the outer pressure sleeve 3 by several screws.

[0027] The annular gap between the upper part of the outer mold 6 and the upper part of the inner mold 5, and the annular groove 501 on the upper part of the inner mold 5 together form the forming channel of the connecting ring 101, which is used for forming the connecting ring 101 part of the multi-pass structure 100.

[0028] The gap between each core mold 7 and the first arm tube forming groove 502 and the second arm tube forming groove on its outer side serves as an arm tube forming channel for forming the arm tube 102 portion in the multi-pass structure 100.

[0029] One end of each core mold 7 is conformally joined to the inner wall of the annular groove 501 on the upper part of the inner mold 5 to form the through hole between the support tube 102 and the connecting ring 101.

[0030] Instruction manual attached Figure 12 The shape of the multi-port structural component in the diagram is for illustrative purposes only; its forearm section is a straight cylindrical section. Figure 2 The forearm section of the multi-pass structural component is a stepped cylindrical section, and the specific mold structure is determined according to the shape of the multi-pass structural component to be formed.

[0031] By setting up support frame 1, the molding mold can be supported and installed. At the same time, the frame structure facilitates the installation of the injection nozzle and the injection of glue.

[0032] By setting the base 2, it is easy to install and fix the inner mold 5, the outer mold 6 and the outer pressure sleeve 3.

[0033] The number of core molds 7 is the same as the number of arm tubes 102 in the multi-channel structural component 100 to be formed.

[0034] The core mold 7 includes a flexible upper arm segment 701 and a rigid lower arm segment 702 connected end to end. The flexible upper arm segment 701 is used to form the upper arm tube, and the rigid lower arm segment 702 is used to form the lower arm tube. That is, the core mold 7 in this invention uses flexible material in a part, which can make the support arm tube 102 easy to demold when there is a bending angle. This effectively solves the problem of inconvenient demolding or even failure to demold in the existing one-piece rigid core mold 7.

[0035] By setting the outer mold 6 as a split mold, it is easier to assemble and disassemble the core mold 7, and also easier to demold.

[0036] The outer mold 6 and the inner mold 5, the outer pressure sleeve 3 and the base 2, and the top cover 4 and the outer pressure sleeve 3 are all connected by screws, which facilitates connection, fixation and disassembly.

[0037] One end of the rigid forearm segment 702 is inclined and a tapered pin 703 is fixed thereon. The end of the flexible boom segment 701 near the rigid forearm segment 702 is also inclined and a tapered hole 704 is formed thereon. The tapered pin 703 and the tapered hole 704 are engaged and connected. With this design, a stable connection between the flexible boom segment 701 and the rigid forearm segment 702 is achieved through the engagement of the tapered pin 703 and the tapered hole 704 and the inclined surface engagement between the rigid forearm segment 702 and the flexible boom segment 701, ensuring no angular offset between them, thereby ensuring the angular accuracy between them and the uniformity of the wall thickness of the boom tube 1021.

[0038] The bottom end of the core mold 7 is mounted on the base 2 via a mounting seat 9, wherein the mounting seat 9 is a cylindrical structure and its outer diameter is larger than the outer diameter of the rigid forearm segment 702. This design fixes the position of the core mold 7 via the mounting seat 9, and the top surface of the mounting seat 9 protruding from the core mold 7 serves as the molding limiting surface of the support arm tube 102, preventing liquid resin from overflowing into the molding channel during the injection process and affecting the final molding of the structural component.

[0039] The base 2 has multiple first injection ports 10 at its bottom, the same number as the number of support tubes 102 to be formed. These first injection ports 10 are connected to the bottom ends of multiple support tube forming channels. The upper part of the external pressure sleeve 3 has multiple second injection ports 11 circumferentially arranged, each connected to the forming channel of the connecting ring 101. The top cover 4 has multiple outlet ports 12 circumferentially arranged, each connected to the top end of the forming channel of the connecting ring 101. This design, by providing a first injection port 10 at the bottom end of each support tube forming channel and multiple second injection ports 11 outside the forming channel of the connecting ring 101, significantly shortens the resin flow distance, increases the RTM injection process time, and ensures that the multi-channel structural component 100 can be completely injection molded without resin shortage or defects such as air bubbles or pores. Multiple second injection ports 11 complement the multiple first injection ports 10, achieving complete molding of the multi-channel structural component 100. Multiple outlet ports 12 are positioned directly above the mold, following the physical logic of upward gas flow, further ensuring complete injection molding of the multi-channel structural component 100, eliminating defects such as insufficient glue and air bubbles or pores. Increasing the number of outlet ports 12 ensures smooth venting. When the number of support arm tubes 102 in the multi-channel structural component 100 is three, a six-in, four-out configuration is preferred, consisting of three first injection ports 10, three second injection ports 11, and four outlet ports 12.

[0040] Multiple guide pins 13 are installed on the base 2, and multiple guide holes are correspondingly opened at the bottom end of the outer pressure sleeve 3. The guide pins 13 are of a split structure, comprising a fixed section 131, a first connecting section 132, and a second connecting section 133 connected sequentially from bottom to top by threads, wherein the fixed section 131 is fixedly mounted on the base 2. With this design, the fixed section 131, the first connecting section 132, and the second connecting section 133 can also be connected by screws. Since the guide pins 13 have a large length dimension, if they were a one-piece structure, it would be inconvenient to install and demold the outer pressure sleeve 3. Therefore, the guide pins 13 are set in segments to facilitate operation and ensure dimensional and positional tolerances. During demolding, the guide pins 13 are first disassembled in segments, which makes demolding easier.

[0041] The inner mold 5 is a segmented mold, comprising a central column 503 and multiple inner segmented molds 504 spliced ​​circumferentially along the central column 503. Each inner segmented mold 504 has a corresponding first arm tube forming groove 502. The limiting end plate 8 is fixed to the top of the central column 503. The central column 503 has a stepped cylindrical structure, and the upper part of the central column 503 is a small-diameter section. The annular groove 501 is formed between the inner segmented molds 504 and the small-diameter section of the central column 503. With this design, the shoulder surface on the central column 503 serves as the bottom surface of the annular groove 501. By designing the inner mold 5 as a segmented mold, processing is facilitated while significantly reducing processing costs.

[0042] The outer mold 6 includes multiple outer segmented molds, which are distributed circumferentially between the inner mold 5 and the outer pressure sleeve 3. This design facilitates molding and demolding.

[0043] The flexible boom segment 701 is made of silicone rubber.

[0044] The external pressure sleeve 3 includes a tapered cylinder 301 and an integrally formed mounting outer edge 302 fixed to the bottom end of the tapered cylinder 301. The mounting outer edge 302 is fixed to the base 2 by a number of screws. With this design, the mounting outer edge 302 is provided with a number of threaded through holes and a number of guide holes for the screws and guide pins 13 to pass through.

[0045] A sealing ring is provided between the external pressure sleeve 3 and the base 2.

[0046] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An RTM molding tool for a composite multi-pass structural component, characterized by: The application relates to a multi-arm pipe forming die, which comprises a support frame (1), a base (2), an external pressure sleeve (3), a top cover (4), an inner die (5), an outer die (6) and a plurality of core dies (7), wherein the base (2) is installed on the support frame (1), the inner die (5) is installed on the base (2), an annular groove (501) with an upward opening is formed in the upper portion of the inner die (5), the outer side wall of the annular groove (501) is lower than the inner side wall, a limiting end plate (8) is coaxially and integrally arranged at the top end of the inner die (5), a plurality of first arm pipe forming grooves (502) are formed in the outer wall of the inner die (5) along the circumference of the inner die (5), a plurality of second arm pipe forming grooves are formed in the inner wall of the outer die (6) along the circumference of the outer die (6), in the closed die state, the plurality of first arm pipe forming grooves (502) and the plurality of second arm pipe forming grooves are correspondingly arranged, a plurality of arm pipe forming through holes are formed, the plurality of core dies (7) are correspondingly arranged in the plurality of arm pipe forming through holes, the outer diameter of the core die (7) is smaller than the inner diameter of the arm pipe forming through hole, and the gap between each core die (7) and the first arm pipe forming groove (502) and the second arm pipe forming groove outside the core die (7) is used as an arm pipe forming channel, the inner wall contour of the outer die (6) is arranged in the same shape as the outer contour of the whole structure formed by the inner die (5) and the limiting end plate (8), the annular gap between the upper portion of the outer die (6) and the upper portion of the inner die (5) and the annular groove (501) of the upper portion of the inner die (5) jointly form a connecting ring (101) forming channel, the core die (7) comprises a flexible large-arm section (701) and a rigid small-arm section (702) connected in a head-to-tail mode, and the outer contour shape of the core die (7) is arranged in the same shape as the inner wall contour of the arm pipe (102) of the multi-pass structure (100) to be formed, the outer die (6) is a split die, the outer die (6) is arranged outside the inner die (5) and is fixed by a plurality of screws, the external pressure sleeve (3) is arranged outside the outer die (6) and is fixed between the bottom end of the external pressure sleeve (3) and the base (2) by a plurality of screws, and the top cover (4) is arranged on the top end of the external pressure sleeve (3), the outer die (6) and the limiting end plate (8) and is fixed with the external pressure sleeve (3) by a plurality of screws.

2. The RTM molding tool for a composite multi-pass structural component of claim 1, wherein: One end of the rigid small-arm section (702) is a bevel, and a conical pin (703) is arranged on the bevel, one end of the flexible large-arm section (701) close to the rigid small-arm section (702) is a bevel, and a conical hole (704) is formed in the bevel, and the conical pin (703) is connected with the conical hole (704).

3. The RTM molding tool for a composite multi-pass structural component of claim 1, wherein: The bottom end of the core die (7) is installed on the base (2) through a mounting seat (9), wherein the mounting seat (9) is a cylindrical structure and the outer diameter of the mounting seat (9) is larger than the outer diameter of the rigid small-arm section (702).

4. The RTM molding tool for a composite multi-cell structural component of claim 1, wherein: The bottom of the base (2) is provided with a plurality of first glue injection ports (10) in number same as the number of the to-be-formed arm pipe (102), and the plurality of first glue injection ports (10) are correspondingly arranged in communication with the bottom ends of the plurality of arm pipe forming channels, and the upper part of the outer pressure sleeve (3) is provided with a plurality of second glue injection ports (11) along the circumference thereof, and each second glue injection port (11) is arranged in communication with the connecting ring (101) forming channel, and the top cover (4) is provided with a plurality of glue outlets (12) along the circumference thereof, and each glue outlet (12) is arranged in communication with the top end of the connecting ring (101) forming channel.

5. The RTM molding tool for a composite multi-pass structural component of claim 1, wherein: A plurality of guide pins (13) are mounted on the base (2), and a plurality of guide holes are correspondingly formed in the bottom end of the outer pressure sleeve (3), and the guide pin (13) is of a split structure, which includes a fixed segment (131), a first connecting segment (132) and a second connecting segment (133) which are threadedly connected from bottom to top, wherein the fixed segment (131) is fixedly installed on the base (2).

6. The RTM molding tool for a composite multi-pass structural component of claim 1, wherein: The inner mold (5) is a split mold, which includes a center cylinder (503) and a plurality of inner split molds (504) which are spliced along the circumference of the center cylinder (503), and a first arm pipe forming groove (502) is correspondingly formed in each inner split mold (504), the limiting end plate (8) is fixedly installed on the top end of the center cylinder (503), the center cylinder (503) is a stepped cylinder structure, and the upper part of the center cylinder (503) is a small-diameter segment, and the annular groove (501) is formed between the inner split mold (504) and the small-diameter segment of the center cylinder (503).

7. The RTM molding tool for a composite multi-pass structural component of claim 1, wherein: The outer mold (6) includes a plurality of outer split molds, and the plurality of outer split molds are distributed along the circumference between the inner mold (5) and the outer pressure sleeve (3).

8. The RTM molding tool for a composite multi-cell structural component of claim 1, wherein: The material of the flexible large arm segment (701) is silicone rubber.

9. The RTM molding tool for a composite multi-cell structural component of claim 1, wherein: The outer pressure sleeve (3) includes a conical cylinder (301) and an installation outer edge (302) which is integrally formed and fixedly installed at the bottom end of the conical cylinder (301), and the installation outer edge (302) and the base (2) are fixedly connected through a plurality of screws.

10. The RTM molding tool for a composite multi-cell structural component of claim 1, wherein: A sealing ring is arranged between the outer pressure sleeve (3) and the base (2).

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