Vacuum infusion device for composite material

Abstract

The utility model relates to the technical field of vacuum infusion, and discloses a composite material vacuum infusion device which comprises a mold table, an infusion cavity is formed in the top face of the mold table, a glass fiber felt is attached to the inner bottom face of the infusion cavity, a vacuum bag is attached to the top face of the mold table, and a sealing structure used for improving the sealing performance of the vacuum bag is arranged on the top face of the mold table. The sealing structure comprises a pressing frame arranged above the mold table, and the bottom face of the pressing frame abuts against the top face of the vacuum bag. According to the utility model, through the arrangement of the sealing structure, the plurality of air cylinders extend out synchronously to drive the connecting frame to move downwards so as to drive the pressing frame to press downwards, and when the pressing frame descends in place, the edge of the pressing frame presses and seals the contact area of the vacuum bag and the mold table, so that a stable mechanical pressurization sealing structure is formed; in the process, mechanical pressing of the vacuum bag is achieved by applying external force, the sealing effect in the vacuum infusion process is remarkably improved, and the problem that the material performance is reduced due to leakage is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of vacuum infusion technology, and in particular to a vacuum infusion device for composite materials. Background Technology

[0002] Composite materials are widely used in aerospace, automobile manufacturing, wind power, sports equipment and other fields due to their excellent mechanical properties and lightweight characteristics. In the production process of composite materials, vacuum infusion molding technology is a common and efficient process method. By injecting resin or other composite materials into pre-laid reinforcing materials such as glass fiber and carbon fiber in a vacuum environment, it is possible to ensure uniform distribution of materials and high-quality molding.

[0003] Existing composite material vacuum infusion devices (publication number: CN222097063U) have at least the following drawbacks: Although the above-mentioned devices use vacuum coating to cover the membrane material onto the infusion mold and then perform vacuum infusion, due to human operation factors in the coating process and the elastic characteristics of the membrane material itself, local loosening or slippage of the contact part between the membrane material and the mold can easily occur, resulting in tiny leakage points, increasing the risk of poor sealing, thus affecting the maintenance of the vacuum environment, causing the generation of air bubbles and uneven resin flow during resin infusion, and consequently leading to a decline in material performance. Therefore, we propose this utility model. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a composite material vacuum injection device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A composite material vacuum infusion device includes a mold platform, an infusion cavity is formed on the top surface of the mold platform, a fiberglass felt is attached to the bottom surface of the infusion cavity, a vacuum bag is attached to the top surface of the mold platform, and a sealing structure for improving the sealing performance of the vacuum bag is provided on the top surface of the mold platform. The sealing structure includes a pressure frame disposed above the mold platform, and the bottom surface of the pressure frame abuts against the top surface of the vacuum bag.

[0007] As a further embodiment of this utility model, a connecting frame is provided on the bottom surface of the mold platform, and several vertical ends of the connecting frame are fixed to the pressure frame. Several cylinders are fixed on the bottom surface of the mold platform, and the telescopic ends of the cylinders are fixed to the top surface of the connecting frame.

[0008] As a further embodiment of this utility model, a vacuum tube and an injection tube are fixedly connected to the top surface of the vacuum bag.

[0009] As a further embodiment of this utility model, guide grooves are provided on all four sides of the mold table, and the vertical end of the connecting frame is slidably disposed within the guide grooves.

[0010] As a further embodiment of this utility model, connecting plates are fixed on all four sides of the pressure frame, the vertical end of the connecting frame is slidably inserted into the interior of the connecting plate, and a bolt is rotatably provided on one side of the connecting plate.

[0011] As a further embodiment of this utility model, the top surface of the mold table is adhered with double-sided tape, and the bottom surface of the vacuum bag is adhered to the top surface of the double-sided tape.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This vacuum filling device, through the setting of a sealing structure, allows multiple cylinders to extend synchronously, driving the connecting frame to move downwards, which in turn drives the pressure frame to press down. When the pressure frame descends to its position, its edges press and seal the contact area between the vacuum bag and the mold table, forming a stable mechanical pressure sealing structure. After sealing is completed, resin is filled through the inside of the vacuum bag. This process achieves mechanical compression of the vacuum bag by applying external force, which significantly improves the sealing effect of the vacuum filling process and effectively avoids the problem of material performance degradation due to leakage. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a composite material vacuum infusion device proposed in this utility model;

[0015] Figure 2 This is a schematic diagram showing the disassembled structure of a composite material vacuum infusion device proposed in this utility model;

[0016] Figure 3 This is a schematic diagram of the disassembled structure at the connecting frame of the composite material vacuum infusion device proposed in this utility model;

[0017] Figure 4 This is a schematic diagram of the mold platform of a composite material vacuum injection device proposed in this utility model.

[0018] In the diagram: 1. Mold table; 2. Injection cavity; 201. Cylinder; 202. Pressure frame; 203. Connecting frame; 3. Vacuum bag; 4. Fiberglass felt; 401. Vacuum tube; 402. Injection tube; 5. Guide groove; 6. Connecting plate; 601. Double-sided tape. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Reference Figures 1-4 A composite material vacuum infusion device includes a mold platform 1, an infusion cavity 2 on the top surface of the mold platform 1, a fiberglass felt 4 attached to the bottom surface of the infusion cavity 2, a vacuum bag 3 attached to the top surface of the mold platform 1, and a sealing structure for improving the sealing performance of the vacuum bag 3 on the top surface of the mold platform 1. The sealing structure includes a pressure frame 202 disposed above the mold platform 1, the bottom surface of the pressure frame 202 abutting against the top surface of the vacuum bag 3, and the vacuum bag 3 is made of silicone.

[0023] In this embodiment, a connecting frame 203 is provided on the bottom surface of the mold platform 1. Several vertical ends of the connecting frame 203 are fixed to the pressure frame 202. Several cylinders 201 are fixed on the bottom surface of the mold platform 1. The telescopic ends of the cylinders 201 are fixed to the top surface of the connecting frame 203. Through the setting of the sealing structure, the operator first lays the fiberglass felt 4 in the injection chamber 2, then covers the top surface of the fiberglass felt 4 and the mold platform 1 with the vacuum bag 3. Then, the cylinders 201 are activated, and multiple cylinders 201 extend synchronously, driving the connecting frame 203 to move downward, thereby driving the pressure frame 202 to press down. When the pressure frame 202 descends to the position, its edge presses and seals the contact area between the vacuum bag 3 and the mold platform 1, forming a stable mechanical pressure sealing structure. After sealing is completed, resin is injected through the inside of the vacuum bag 3. This process achieves mechanical compression of the vacuum bag 3 by applying external force, which significantly improves the sealing effect of the vacuum injection process and effectively avoids the problem of material performance degradation due to leakage.

[0024] In this embodiment, a vacuum tube 401 and an injection tube 402 are fixedly connected to the top surface of the vacuum bag 3. The vacuum tube 401 is connected to an external vacuum pump, and the injection tube 402 is connected to an external resin tank. When performing vacuum injection, the injection personnel can use the vacuum tube 401 to evacuate the vacuum bag 3 and the injection chamber 2, and then inject the resin in the resin tank into it through the injection tube 402.

[0025] In this embodiment, guide grooves 5 are provided on all four sides of the mold platform 1. The vertical end of the connecting frame 203 is slidably disposed inside the guide groove 5. The guide groove 5 can limit and guide the connecting frame 203, making it more stable when it is raised and lowered.

[0026] In this embodiment, connecting plates 6 are fixed on all four sides of the pressure frame 202. The vertical end of the connecting frame 203 is slidably inserted into the interior of the connecting plate 6. A bolt is rotatably provided on one side of the connecting plate 6. The bolt is threadedly connected to the vertical end of the connecting frame 203. The connecting frame 203 is fixed to the pressure frame 202 by the bolt and the connecting plate 6. The bolt connects the connecting frame 203 and the pressure frame 202, making it convenient for workers to disassemble and assemble the pressure frame 202.

[0027] In this embodiment, double-sided tape 601 is adhered to the top surface of the mold table 1, and the bottom surface of the vacuum bag 3 is adhered to the top surface of the double-sided tape 601. The double-sided tape 601 can improve the sealing performance of the vacuum bag 3.

[0028] Working principle: In use, the operator first lays the fiberglass felt 4 in the filling chamber 2, then covers the top surface of the fiberglass felt 4 and the mold table 1 with the vacuum bag 3. Then, the cylinder 201 is activated, and multiple cylinders 201 extend synchronously, driving the connecting frame 203 to move downward, which in turn drives the pressure frame 202 to press down. When the pressure frame 202 descends to the position, its edge presses and seals the contact area between the vacuum bag 3 and the mold table 1, forming a stable mechanical pressure sealing structure. After sealing, resin is poured into the vacuum bag 3. During vacuum pouring, the pouring operator can evacuate the vacuum bag 3 and the filling chamber 2 through the vacuum tube 401, and then inject the resin from the resin tank into it through the pouring tube 402. The guide groove 5 can limit and guide the connecting frame 203, making it more stable when rising and falling. The connecting frame 203 and the pressure frame 202 are connected by bolts, which makes it easy for the operator to disassemble and assemble the pressure frame 202. The double-sided tape 601 can improve the sealing of the vacuum bag 3.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A composite material vacuum infusion device, comprising a mold table (1), characterized in that: The top surface of the mold platform (1) is provided with an injection cavity (2), the bottom surface of the injection cavity (2) is attached with a fiberglass felt (4), the top surface of the mold platform (1) is attached with a vacuum bag (3), and the top surface of the mold platform (1) is provided with a sealing structure for improving the sealing performance of the vacuum bag (3). The sealing structure includes a pressure frame (202) set above the mold platform (1), and the bottom surface of the pressure frame (202) abuts against the top surface of the vacuum bag (3).

2. The composite material vacuum infusion device according to claim 1, characterized in that, The bottom surface of the mold platform (1) is provided with a connecting frame (203), and several vertical ends of the connecting frame (203) are fixed to the pressure frame (202). Several cylinders (201) are fixed on the bottom surface of the mold platform (1), and the telescopic ends of the cylinders (201) are fixed to the top surface of the connecting frame (203).

3. The composite material vacuum infusion device according to claim 2, characterized in that, The top surface of the vacuum bag (3) is connected and fixed with a vacuum tube (401) and an injection tube (402).

4. The composite material vacuum infusion device according to claim 3, characterized in that, The mold platform (1) has guide grooves (5) on all four sides, and the vertical end of the connecting frame (203) slides inside the guide grooves (5).

5. A composite material vacuum infusion device according to claim 4, characterized in that, The pressure frame (202) is fixed with connecting plates (6) on all four sides. The vertical end of the connecting frame (203) is slidably inserted into the interior of the connecting plate (6). A bolt is rotatably installed on one side of the connecting plate (6).

6. The composite material vacuum infusion device according to claim 5, characterized in that, The top surface of the mold table (1) is bonded with double-sided tape (601), and the bottom surface of the vacuum bag (3) is bonded to the top surface of the double-sided tape (601).

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