VACUUM-ASSISTED RESIN TRANSFER MOLDING SYSTEM AND METHOD

TR202521253A3Pending Publication Date: 2026-09-21ERMETAL OTOMOTIV VE ESYA SANAYI TICARET ANONIM SIRKETI
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Patent Information

Application Number
TR202521253
Authority / Receiving Office
TR · TR
Patent Type
Applications
Current Assignee / Owner
Filing Date
2025-12-22
Publication Date
2026-09-21

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Abstract

The invention relates to a vacuum-assisted resin transfer molding system and method. Specifically, the invention relates to a system and method comprising a distribution network of closed channels located within the core body, which do not alter the external surface geometry of the part, along with associated distribution channels, distribution inlets and distribution outlets, operating under a vacuum bag, for resin feeding and vacuum application to ensure simultaneous and homogeneous advancement of the resin within the fiber reinforcement material.
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Description

1 TARIFF VACUUM-ASSISTED RESIN TRANSFER MOLDING SYSTEM AND METHOD Technical Area The invention relates to a vacuum-assisted resin transfer molding system and method. The invention specifically concerns the simultaneous and homogeneous 5% of resin within the fiber reinforcement material. to enable its advancement, it is positioned inside the core body and outside the part. A distribution network consisting of closed channels that do not alter the surface geometry, connected to it. including distribution channels, distribution inlets and distribution outlets, under vacuum bag It relates to systems and methods that have a working resin feeding and vacuum application arrangement. State of the Art 10 Within composite material production technologies, vacuum-assisted resin transfer is used. The molding method is referred to in the literature as VARTM (Vacuum Assisted Resin Transfer Moulding). It is known by its abbreviation and is frequently used in industrial applications as vacuum infusion or It is also called the vacuum bagging process. This method is particularly suitable for large sizes. It is a preferred manufacturing technique in the production of three-dimensional composite structures, used in automotive, 15 aviation and space, maritime, wind turbines, rail transport systems, defense It finds widespread application in the industrial and industrial equipment sectors. The basic working principle of the VARTM process is that it has the geometric form of the part to be produced. glass fiber, carbon fiber or similar reinforcing materials on a mold surface 20 It is based on the principle of sealing with a vacuum bag. During the process, the mold Thermoset resin is fed from one end of the system, while from the other end... The pressure is reduced by means of a vacuum pump, and thanks to this pressure difference, the resin is released. The resin is allowed to move through the fiber structure. The entire volume of the fiber is filled with resin. After filling, the feeding is stopped, then the resin is chemically treated at 25. A certain amount of time is allowed to complete the curing reaction, and as a result, the fiber A reinforced composite structure is obtained. During the application of existing vacuum-assisted resin transfer molding methods The most fundamental technical problem encountered is the shortest path of the resin to the point where vacuum is applied. It progresses by following the flow path. Under the influence of vacuum pressure, the resin main flow 30 It is progressing quite rapidly along its route, but this main line 2 The spreading that occurs from the surface towards the edge and sides of the fiber, It relies largely on diffusion mechanisms and vacuum-induced convective It occurs at an extremely slow rate compared to the flow. This situation is particularly problematic in wide areas. This leads to a number of problems in the production of composite parts with a high surface area and thin walls. It opens. The moment the resin reaches the vacuum point, all volumetric regions of the fiber are 5 because it is not yet sufficiently wet, the fiber cannot be fully wetted. Continuing the resin supply becomes essential. During this process, already The resin that has reached the vacuum line is discharged from the system and treated as waste. This is being evaluated, which leads to both material waste and a significant increase in process time. It causes it to lengthen. 10 A review of the current technical literature reveals that vacuum-assisted resin transfer molding... In this method, various methods are used to accelerate resin dispersion and increase homogeneity. It is observed that assistive applications are being developed. Among these applications are templates. distribution channels, flow guide grids, and resin dispersing meshes placed on its surface. and various porous media structures are included. However, 15 of these types of auxiliary elements Mounting to the mold surface, leaving marks or indentations on the final surface quality of the composite part. or causes aesthetic defects, and this is especially true for visible surfaces. an acceptable solution in applications requiring poor or high surface quality It does not offer. Furthermore, three-dimensional printing technologies have seen an increasing trend in recent years. VARTM 20 is used as a mold or core-like element for structures produced using this method. This involves integrating them into the processes. In such applications, three-dimensional... additional distribution channels or mechanical grids on the surface of the printer-produced structure Installing them is not technically feasible because these structures are generally low-profile. They are manufactured from high-strength polymeric materials and sealed with a vacuum-sealed coating. It cannot exhibit sufficient structural strength when a bag is applied. Therefore, 25 both in the production of large and thin-walled parts and in products manufactured with a 3D printer. In VARTM applications where structures are used as mold-like elements, the part exterior The resin simultaneously binds to the fibers without causing aesthetic or geometric distortions on the surface. and an alternative resin delivery system that will enable homogeneous wetting The need cannot be met at the current technical level. 30 In application number US2003025232A1, which is included in the known state of the art, the fiber a tube or porous resin placed between the layer and the vacuum bag Thanks to the distribution medium, the resin flows faster between the entry and exit points. It is suggested that additional pathways be created for the resin to flow. This approach allows the resin to flow in specific directions. 3 Although it allows for faster delivery to regions, these distribution elements are parts. placed on the outer surface of the fiber so that it can be separated after production is complete is required. If the part is wide, this additional material is provided from the outer surface. Even the pathways completely eliminate the problem of delayed wetting in the central regions of the fiber. cannot lift it. 5 To ensure more homogeneous and simultaneous wetting of the fiber, US5721034A A different solution was presented in application number [number]. In this document, the mold or core main feed channels created on their surfaces and micro-connected to these channels A resin distribution network consisting of channels is described. The resin is distributed through these channels. This allows the fibers to be distributed more evenly through the channels. However, these channels have 10 located directly on the mold or core, these channels after curing This causes the traces to be visible on the part surface. Channel dimensions While reducing the size of the scars may decrease their visibility, this negatively affects the co-flow of the resin. It has an impact in this direction. It is also necessary for the production of thin and large-sized parts. High vacuum pressure causes the vacuum bag to press harder on the mold surface and 15 This leads to the surface markings becoming more prominent. Similarly, in application number CN101754849A, improving resin delivery for this purpose, a core block with grooves of different heights on both surfaces A resin delivery network has been defined. This structure allows for more controlled distribution of the resin along the core. It enables progress and increases flexibility. However, this solution also involves resin distribution 20 This requires the channels to be an integral part of the structure, therefore the part Similar disadvantages include the formation of marks on the surface and limitations in design freedom. It brings with it. With the widespread adoption of three-dimensional printing technologies, mold making in the VARTM process has become commonplace. Alternative approaches to its use have also been developed. In document number US6630093B1, 25 a structure produced with a 3D printer directly as a core or mold-like element using it as is and obtaining the final product by applying VARTM to it. This is explained. A significant advantage of this method is that it does not require an additional mold. while providing this, the part produced with a 3D printer can later be removed from the structure. The use of hoses or porous distribution elements due to their inability to be separated 30 This is not possible. This situation prevents the resin from wetting the fiber simultaneously and homogeneously. this makes it more difficult and the method particularly unsuitable for parts with large surface areas. It brings. 4 In conclusion, due to the negative aspects described above and the current solutions being the subject of discussion... Due to its shortcomings, an improvement is needed in the relevant technical field. It has been made. Purpose of the Invention The invention was created by drawing inspiration from existing situations and addressing the aforementioned drawbacks. 5 It aims to solve the problem. The invention relates to composites manufactured using a vacuum-assisted resin transfer molding method. emerging in the field of material production technology and at the current technical level sufficient to offer solutions to fundamental problems that have not yet been resolved The primary application area of ​​the invention is for thin materials with a large surface area. Manufactured using three-dimensional printing technologies and the production of multi-layered composite parts. The structures are directly incorporated into the VARTM process as formwork or core-like elements. It encompasses the production processes in which it is integrated. In this context, the industrial aspect of the invention... Application potential: automotive, aerospace, marine, wind energy turbines 15 in the wings, rail transportation systems, defense industry and industrial equipment sectors all where large-sized composite structures requiring high surface quality are produced It is suitable for evaluation in these fields. Furthermore, the invention reduces the need for additional mold investments. reducing the need and directly integrating 3D-printed structures into the production process. Thanks to its technical structure that allows for this, prototyping studies are carried out at a low cost. also in specialized areas such as high-volume series production applications and functional end-part manufacturing. It offers a technological alternative that can be used effectively. The main purpose of the invention is to improve the performance of existing methods, especially for materials with large surface areas and thin surfaces. The goal is to eliminate critical problems encountered during the production of multi-walled parts. In the current technique, the resin follows the shortest flow path towards the point where vacuum is applied. Due to its progression, the resin 25% is not yet sufficiently wet for the entire fiber structure. There is a problem with reaching the vacuum outlet. This situation prevents the fiber from being fully wetted. This necessitates the continuation of resin supply for a long period of time, and during this process, already The resin that has reached the vacuum line is discharged from the system and becomes waste. This leads to both a significant increase in process time and serious consequences. This causes a significant loss of resin. Furthermore, in current applications, 30 Distribution channels mounted on the mold surface to improve resin distribution, The use of grids or porous media structures affects the final exterior of the composite part. causing mold marks, channel marks or other aesthetic defects to appear on its surface This is the case, and this is acceptable in applications requiring high surface quality. It does not offer a solution. The invention is based on the solution developed to the technical problems mentioned above, namely the resin. leave the flow solely to the slow diffusion mechanism within the fiber structure. instead, it is positioned inside the core body and the part's outer surface geometry is 5 controlled via a distribution network that does not alter it in any way It is based on its guidance. The fundamental principles that form the technical structure of this solution. elements; the distribution network embedded within the core structure, and the components that make up this network. distribution channels extending within the core allow the resin to flow into these channels in a controlled manner. It consists of distribution inputs and distribution outputs that provide input and output in this way. 10 It is located below the core surface of the distribution channels, that is, the final outer surface of the part. Because it is located behind the area that will form the surface, the composite part is external. no marks, indentations or aesthetic defects are formed on the surface, and thus the surface The quality is maintained. At the same time, the cross-sectional area, number, and length of the distribution channels are also maintained. and their positions within the core depend on the specific geometry of the part to be produced, 15 The fact that it can be designed according to its dimensions and fiber arrangement, and the resin's ability to alter the fiber structure... It enables simultaneous and homogeneous wetting. Thanks to this technical arrangement, the resin is prevented from reaching the vacuum line prematurely. This minimizes unnecessary resin discharge and reduces total process time. It is significantly shortened. In addition, 20 integrated with the core structure of the distribution network. its structure and the entire system being produced as a single piece using 3D printing technology Designed to be manufacturable, with additional hose connections, separate pore distribution. eliminates the need for auxiliary systems requiring components or mechanical assembly This feature removes the mold-like structure of both 3D-printed cores. as an element in modern production practices as well as in traditional large and 25 In the manufacturing of thin-walled parts, it is effective without negatively affecting the surface quality of the part. It offers a resin dispensing solution that is fast and reduces material waste. The structural and characteristic features and all the advantages of the invention are given in the figures below. This becomes clearer thanks to the detailed explanation written with references to these figures. This will be understood, and therefore the evaluation should also take these forms and detailed explanations into account. 30 It needs to be done by taking precautions. 6 Figures that will help understand the invention. Figure 1 shows a side view of the system that is the subject of the invention. Figure 2 shows a top view of the system that is the subject of the invention. Explanation of Part References 1 Distribution network 5 2 Distribution channels 3 Distribution inputs 4 Distribution outputs 11 Molds 12 Cores 10 21 Vacuum bags 22 Fibers Sealant 41 Input links 42 Output connection 15 Detailed Description of the Invention This detailed explanation describes the preferred configurations of the system and method that are the subject of the invention. This explanation is provided solely to facilitate a better understanding of the subject. The invention relates to composites manufactured using a vacuum-assisted resin transfer molding process. It is a system and method developed for use in material production technology, 20 the simultaneous and homogeneous movement of the resin within the fiber reinforcement material It offers a technical solution aimed at providing this. The technical structure that forms the basis of the invention, located within the core body and determining the outer surface geometry of the part. It is based on a closed channel system that does not change in any way. This system Thanks to this, resin waste, long process times, and surface area issues encountered in current technology are eliminated. The aim is to prevent quality problems. At the heart of the vacuum-assisted resin transfer molding system that is the subject of the invention area distribution network (1), simultaneous and homogeneous advancement of resin in fiber (22) In order to provide, the core (12) is positioned inside the body, without damaging the surface. It is a flow structure consisting of closed channels. This distribution network (1) ensures low flow of resin 30 by advancing with its resistance, it can quickly reach the target areas and with its cross-sectional area 7 It consists of distribution channels (2) designed with controlled length. Distribution inlet (3) of resin from the medium between vacuum bag (21) and core (12) a passage that enables it to be directed to the distribution channel (2) and opens to the core (12) surface It functions as a hole. The distribution outlet (4) is located inside the distribution channel (2). By enabling the resin to come out in a controlled manner to the core (12) surface of the fiber (22) 5 It is defined as an outlet hole that allows wetting in designated areas. Among the structural elements of the system is the mold (11), the outer part of the part to be produced. a production volume that determines its geometry and is sealed together with a vacuum bag (21). The surface geometry that forms is located as a defined structure. The kernel (12), distribution containing the network (1) and on which the fiber (22) is located and gives the fiber its final shape 10 It is a supporting structure that can be produced in one piece using 3D printing technology. The fact that it is designed in this way constitutes an important technical feature of the invention. Vacuum vacuum by creating an isolated environment together with the bag (21), mold (11) and / or core (12). It is a flexible, liquid and gas impermeable covering element that enables the application of pressure. Fiber (22), mechanical strength is provided by wetting with resin and the resin is 15 under vacuum pressure Included in the system as a reinforcement material that creates high flow resistance against its advancement. is being done. The functional connection elements of the system include sealant (30), vacuum bag By preventing air and resin leaks between (21) and mold (11), the continuity of the insulated environment It acts as an adhesive sealing element providing the inlet connection (41), 20 the resin is released in a controlled manner into the isolated medium between the vacuum bag (21) and the core (12). It is the connecting element that provides the feed and passes through the vacuum bag (21). The outlet connection (42) allows the resin to be distributed through the fibers (22) by applying vacuum pressure. vacuum line connector that enables the flow to progress along the network (1) and directs the flow It functions as follows: 25 The vacuum-assisted resin transfer molding method described in this invention involves a specific sequence. It consists of the steps involved in the process. In the first step of the method, on the mold (11) or on the mold (11) in accordance with the geometry of the part to be produced production by using the core (12) produced in one piece to include. The surface is formed. The core (12) directs the resin in a controlled manner. 30 without altering the surface geometry, in a way that will provide the body with distribution network (1), distribution channels (2), distribution inlets (3) and distribution outlets (4) It is prepared or produced with three-dimensional printing technology. Then the fiber (22), 8 part thickness and mechanical to be produced on mold (11) and / or core (12) They are laid out in a way that will meet the requirements. In the next steps of the method, the fiber (22) is covered with a vacuum bag (21) and sealing paste in the circumferential area between the vacuum bag (21) and the mold (11) An isolated environment is created by applying (30). 5 is opened on the vacuum bag (21). through holes to the resin entry points of the core (12) (41) and Outlet connections (42) are placed at the points where vacuum will be applied. Outlet connection by applying vacuum pressure through (42) between the vacuum bag (21) and the core (12) negative pressure is created. Under vacuum pressure, through the inlet connection (41) The resin is fed into the isolated medium between the vacuum bag (21) and the core (12). 10 During resin feeding, while the resin moves through the fiber (22), some of it By entering the distribution channels (2) from the distribution inlets (3), it reaches the distribution network (1) and is low They are routed to distribution outlets (4) via resistive paths. From the distribution network (1) The resin that comes out comes to the surface of the core (12) and simultaneously and homogeneously coats the fiber (22). It moves towards the outlet connection (42) under the effect of vacuum pressure, wetting it. 15 After the fiber (22) is completely wetted, resin is fed from the inlet connection (41). The process is stopped and the resin is left under vacuum or for a certain period of time after the vacuum is removed. The composite part is formed by chemically curing it throughout the process. The invention is used in vacuum-assisted resin transfer molding as a preferred application. In the system, the core (12) is positioned on the appropriate surface of the mold (11). 20 The geometry of the mold (11) surface in which the core (12) is positioned, the core's positioning in the mold It is designed to be compatible with the geometry of the contacting substrate. For example... Both surfaces can have planar geometry. An alternative to the invention. In the application process, when the geometry of the part to be produced is suitable, it can also be molded. (11) is not needed. In this configuration, the core (12) will include the mold (11) 25 It is designed as a single piece and produced as a single piece using a 3D printer. can be produced. In both configurations, the core (12) is a distribution network (1) It includes the distribution network (1), channels located inside the core (12) body. is formed and the channels of the distribution network (1) the surface geometry of the core (12) It does not change and is located below the surface. The distribution network (1) only 30 The starting and ending ends come out onto the surface of the core (12), so that the part is on the outer surface This prevents any marks or defects from forming. 9 In the subsequent processing stages, the method steps for any configuration continue. The fiber (22) is placed on the mold (11) and / or core (12). (22) a vacuum bag (21) is placed on top of the (22) and the outer circumference of the vacuum bag (21) sealant (30) between vacuum bag (21) and mold (11) It is applied. Sealing paste (30), vacuum bag (21) and mold (11) are placed 5 sealing and sealing between vacuum bag (21) and mold (11) It creates an isolated environment between them. The resin entry into the core (12) At least one inlet connection to the desired point or points (41), vacuum application At least one output connection (42) is placed at the desired point or points. By making holes in the vacuum bag (21), the inlet connection (41) and 10 are made at the points where they intersect. The outlet connection (42) can be made to go outside the vacuum bag (21), so that Entry and exit of resin into the isolated medium between vacuum bag (21) and core (12) This makes it possible for them to do so. If vacuum pressure is provided from the outlet connection (42) as well as from the inlet connection (41) When resin is introduced, the resin quickly wets the fiber (22) under the effect of vacuum pressure. It tends to proceed along the shortest path towards the output connection (42). Distribution network (1) creates new flow paths which are alternative to this shortest path. Vacuum bag (21) Due to insufficient medium volume between the core (12) and the entire resin, Since it cannot go by the shortest route, some of the resin is also distributed through the distribution network (1) channels. It is moving towards the exit connection (42) from inside. 20 that do not enter the distribution network (1). While the resin moves slowly due to the high friction between it and the fiber (22), the distribution network (1) The resin moves quickly thanks to its low flow resistance. Distribution The resin progressing through the network (1) ends at the point where the channel of the distribution network (1) ends, the core (12) coming to the surface and wetting the fiber (22) on the fiber (22) by the effect of vacuum pressure It continues to move towards the exit connection (42). 25 When the structural and functional details of the distribution network (1) are examined, it is seen that this structure is the distribution channel (2) is an integrated system consisting of distribution input (3) and distribution output (4) It is seen that at least one inlet connection (41) with the vacuum bag (21) and core (12) Some of the resin that enters the medium between them passes through the distribution inlet (3) into the distribution network. (1) is making an inlet. The distribution inlet (3) is located on the surface of the core (12) and the resin 30 a hole which enables the entry into the distribution channel (2) and the inlet connection (41) It is located right next to it. The resin enters through the dispensing inlet (3) and at least one It proceeds in the distribution channel (2). The distribution structure, number, and cross-section of the distribution channel (2) The area and length, the density of the region where simultaneous wetting of the resin is desired. It is arranged accordingly. The distribution outlet (4) is located on the surface of the core (12) and as a hole that enables the resin to exit the distribution channel (2) It is defined. The resin leaves the distribution network (1) from at least one distribution outlet (4). and distribution outlet (4), suitable for the area where simultaneous wetting of the resin is desired. It is positioned in this way. The resin coming out of the distribution network (1) wets the fiber (22) 5 It is moving towards the output connection (42). When the working principle of the invention is considered in detail, it involves the resin from the inlet connection. (41) After entering the environment between the vacuum bag (21) and the mold (11), it takes the shortest path It appears that there is a tendency to progress to the output connection (42). This situation is particularly For parts with a large surface area, the resin should be applied before completely wetting the fiber. This carries the risk of reaching the outlet connection (42). In such parts distribution network (1), a function that enables the resin to wet the fiber simultaneously. It undertakes this. The wetting process varies according to the geometry of the part to be produced. distribution structure, number, cross-sectional area of ​​the distribution channel (2) in accordance with the conditions and The position of the distribution outlet (4) can be adjusted with its length. Thus, the wide parts 15 For its production, the resin ensures that the fiber (22) is simultaneously wetted. The fiber (22) After ensuring that it is completely wetted, the resin inlet is cut off from the inlet connection (41) After waiting for a sufficient amount of time, the chemical curing of the resin is completed and the final A composite part is thus obtained.

Claims

11 REQUESTS 1. It is a vacuum-assisted resin transfer molding system; its characteristic is:  to ensure the simultaneous and homogeneous advancement of the resin within the fiber (22) For the purpose of the closed body of the core (12) which does not damage the surface a distribution network consisting of channels (1), 5  The resin advances quickly to target areas with its low flow resistance. at least one distribution channel that enables it to reach and forms the distribution network (1) (2),  Distribution of resin from the medium between vacuum bag (21) and core (12) opening on the surface of the core (12) which enables it to be directed into the channel (2) and 10 at least one distribution located right next to the entry link (41) entry (3),  Controlled flow of resin through the distribution channel (2) to the core (12) surface by making the fibers (22) wet in the specified areas, 15, which makes it possible and where simultaneous wetting of the resin is desired. at least one distribution outlet located in a suitable position (4),  containing the distribution network (1) and on which the fiber (22) is located and The core, which is the carrier structure that gives the fiber its final shape (12),  by creating an isolated environment together with the core (12) the vacuum pressure 20, a flexible, liquid and gas impermeable cover element that enables its application. vacuum bag (21),  Mechanical strength is achieved by being wetted with resin and under vacuum pressure fiber that forms high flow resistance against resin advancement (22),  the resin in the isolated medium between the vacuum bag (21) and the core (12) 25 passing through the vacuum bag (21) which enables controlled feeding. at least one entry link (41),  By applying vacuum pressure, the resin is distributed to the fiber (22) and distribution network (1) at least one exit connection that allows it to progress along and directs the flow. (42) It includes. 30 2. It is a vacuum-assisted resin transfer molding system conforming to Claim 1, and its characteristics are: only the start and end ends of the distribution network (1) are on the surface of the core (12) 12 exit and distribution network (1) channels of the core (12) surface geometry It is located below the surface without changing its position.

3. Vacuum-assisted resin transfer molding system conforming to claim 1 or 2. The feature is that the kernel (12) will include the distribution network (1) from the three-dimensional printer. The product must be in one piece. 5 4. Vacuum-assisted resin transfer molding suitable for any of the previous requirements. The system's characteristic features are its distribution structure, number, cross-sectional area, and length of resin. The distribution can be adjusted according to the density of the area to be wetted over time. It includes channel (2).

5. Vacuum-assisted resin transfer molding according to any of the previous requirements 10 Its characteristic feature is that it is a system that determines the external geometry of the part to be produced and uses vacuum. forming a leakproof production volume with its bag (21), with defined surface geometry It contains a mold (11) which is a structure.

6. Vacuum-assisted resin transfer molding system conforming to Claim 5, with the following characteristics: The geometry of the base surface of the core (12) in contact with the mold (11), the core (12) 15 It is compatible with the geometry of the surface of the mold (11) in which it is positioned.

7. Vacuum-assisted resin transfer molding conforming to any of claims 1 to 4. The system has the feature of being a single piece which includes the core (12) mold (11). It is the fact that.

8. Vacuum-assisted resin transfer molding system conforming to Claim 7, with the following feature: 20 one-piece made from a three-dimensional printer including the core (12) mold (11). It is in the state of being.

9. Vacuum-assisted resin transfer molding conforming to any of claims 5 through 8. The system has the feature of; air and resin between the vacuum bag (21) and the mold (11). Adhesive sealant 25 that ensures the continuity of the insulated environment by preventing leaks. It contains sealing paste (30) which is an element.

10. It is a vacuum-assisted resin transfer molding method, characterized by: (a) on the mold (11) or in accordance with the geometry of the part to be produced. the core (12) produced in one piece including the mold (11) Creating the production surface by using, 30 13 (b) the core (12) will ensure the controlled orientation of the resin. distribution located within the body without changing the surface geometry in this way network (1), distribution channels (2), distribution inlets (3) and distribution outlets (4) prepared together or produced with a 3D printer, (c) Thickness of the part to be produced on the fiber (22), mold (11) and / or core (12) is 5 and laid in a way that meets mechanical requirements, (d) through holes made on the vacuum bag (21) the resin of the core (12) the entry points of the inlet connections (41) and the points where vacuum will be applied Placement of outlet connections (42), (e) Vacuum pressure is applied through the outlet connection (42) to the vacuum bag 10 Creating negative pressure between (21) and the core (12), (f) vacuum bag of resin through inlet connection (41) under vacuum pressure Feeding into the isolated medium between (21) and the core (12), (g) distribution of some of the resin as it moves through the fiber (22). By entering the distribution channels (2) from their inputs (3) and throughout the distribution network (1) low 15 Directing to distribution outlets (4) via resistive roads, (h) resin coming out of the distribution network (1) comes out to the core (12) surface of the fiber (22) by the effect of vacuum pressure to wet simultaneously and homogeneously progressing toward the output connection (42), (i) resin 20 from the inlet connection (41) after the fiber (22) is completely wetted. stopping the feeding, (j) resin under vacuum or after vacuum is removed for a certain period of time The composite part is formed by chemically curing it throughout the process. It includes the steps of the process.

11. This is a vacuum-assisted resin transfer molding method conforming to claim 10, with the following characteristic: 25 high friction between the resin (1) which does not enter the distribution network and the fiber (22) Due to the slow progress of the resin through the distribution network (1), the low flow rate of the resin progresses through the distribution network (1). Its rapid progress is due to its resistance.

12. Vacuum-assisted resin transfer molding method conforming to claim 10 or 11. its feature; the resin progressing in the distribution network (1) ends at the end of the channel of the distribution network (1) 30 at the point where the core (12) comes to the surface and wets the fiber (22) on the fiber (22) It continues to move towards the outlet connection (42) under the influence of vacuum pressure. 14 13. Vacuum-assisted resin transfer molding conforming to any of claims 10 to 12. The method and its feature is; distribution structure, number, cross-sectional area of ​​the distribution channel (2) the length and the position of the distribution outlet (4) of the part to be produced It is adjusted according to the wetting conditions, which vary depending on its geometry.

14. Vacuum-assisted resin transfer molding conforming to any of claims 10 to 13. 5 The method and its feature is that the core (12) is placed on the suitable surface of the mold (11). positioning and the surface of the mold (11) where the core (12) is positioned its geometry is compatible with the base surface geometry of the core in contact with the mold. It is the fact that.

15. Vacuum-assisted resin transfer molding conforming to any of claims 10 to 13. The method and its feature is that the core (12) will be in one piece including the mold (11). It is made of 3D paper and produced as a single piece.

16. Vacuum-assisted resin transfer molding conforming to any of claims 10 to 15. The method and its feature is that the fiber (22) is covered with a vacuum bag (21) and Sealing compound 15 in the circumferential area between vacuum bag (21) and mold (11) (30) is the creation of an isolated environment by applying.