A composite material forming die suitable for a VARI formed beam rib structural member

Abstract

The application discloses a composite material forming die suitable for a VARI forming belt beam rib structure member, which comprises a main body die, end rib positioning clamping plates, rib positioning clamping plates and beam positioning clamping plates arranged on the main body die; wherein the end rib positioning clamping plates are detachably connected with end rib core blocks, and the rib positioning clamping plates are detachably connected with rib core blocks; an air extraction bag sealing groove is formed on the rib core block, a release cloth and a VAP film are sequentially placed in the air extraction bag sealing groove, and the air extraction bag sealing groove is sealed, and an air extraction pipe is inserted at the same time; the die designed in the application does not need to be wrapped into the whole die when bagging, and a bagging space is left between the clamping plate and the core block; each core block is equivalent to an independent air extraction bag, and the problem of easy glue shortage, rich resin and wrinkle during forming of a multi-beam multi-rib structure by using a VARI process can be solved.

Description

Technical Field

[0001] This invention relates to the field of composite material molding technology, and in particular to a composite material molding die suitable for VARI molding of beam-ribbed structural parts, especially for multi-beam and multi-ribbed structures. Background Technology

[0002] Ribbed structural components are commonly used in composite materials due to their durability and maintainability. However, traditional autoclave molding processes are costly, often requiring step-by-step molding and assembly. VARI molding, on the other hand, offers advantages such as low cost and fewer limitations. Using VARI for integral molding of ribbed structural components saves significant amounts of connectors and adhesives compared to step-by-step molding of beams, ribs, and skin followed by assembly with connectors and structural adhesives. This reduces overall structural weight, improves structural stability, and eliminates the need for assembly tooling, further lowering the product's life-cycle cost.

[0003] Although VARI molding can reduce the cost of integral molding of beam-ribbed structural parts, when molding beam-ribbed structural parts with VARI, especially multi-beam and multi-ribbed structures, the complex overall structure due to the many beam-rib intersections can lead to situations where the resin cannot fully penetrate the beam-rib structure. This can result in quality defects such as insufficient resin after molding. Furthermore, multi-beam and multi-ribbed structures have many corners, contact surfaces, and limited space, which not only makes mold demolding difficult, but the complex mold shape also increases the difficulty of the packaging process, resulting in defects such as localized insufficient resin and wrinkles in the parts. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this application proposes a composite material molding die suitable for VARI-molded beam-ribbed structural components. This die is designed to address the problems that easily arise when VARI integrally molds multi-beam, multi-ribbed structures, such as difficulty in demolding, bagging, and positioning, as well as issues like insufficient glue, excessive resin, and wrinkles.

[0005] The technical solution adopted in this invention is as follows:

[0006] A composite material molding die suitable for VARI-molded beam-rib structural members, comprising:

[0007] Main mold,

[0008] Two end rib positioning plates are detachably mounted on the main mold, and the two end rib positioning plates are arranged opposite to each other; an end rib core block can be detachably connected to each of the end rib positioning plates.

[0009] Several rib positioning plates are detachably mounted on the main mold. The rib positioning plates are positioned between two end rib positioning plates and are parallel to each other. Rib core blocks are detachably connected to the rib positioning plates.

[0010] A detachable beam positioning plate is installed on the main mold.

[0011] Furthermore, the number of rib positioning plates is set according to the number of ribs between the two end ribs of the beam rib structural member.

[0012] Furthermore, the rib positioning plate consists of two parts: a first rib positioning plate and a second rib positioning plate. One end of the second rib positioning plate is detachably connected to the main body mold, and the other end of the second rib positioning plate is detachably connected to one end of the first rib positioning plate. The other end of the first rib positioning plate is detachably connected to the main body mold. There is a gap between the main body of the first rib positioning plate and the second rib positioning plate and the main body mold, and a rib core block is detachably connected to the first rib positioning plate.

[0013] Furthermore, a vacuum bag sealing groove is formed on the core block, and a release cloth and a VAP membrane are placed in sequence in the vacuum bag sealing groove and sealed along the groove, while a vacuum tube is inserted.

[0014] Furthermore, at least one beam positioning plate is provided, which is evenly distributed between the two end rib positioning plates.

[0015] Furthermore, the beam positioning plate fixes the outermost beam of the composite material.

[0016] Furthermore, the beam positioning plate is a "Z"-shaped bent plate, one end of which is detachably connected to the main mold, and the other end is detachably connected to the corresponding beam.

[0017] Furthermore, one end of the end rib positioning plate is detachably connected to the main body mold, and an end rib core block is detachably connected to the other end of the end rib positioning plate.

[0018] Furthermore, pre-formed beams are used in the mold application process.

[0019] The beneficial effects of this invention are:

[0020] 1. The mold designed in this invention can adjust the position and number of the end rib positioning plate, rib positioning plate and beam positioning plate on the main mold according to the structure of the composite material to be molded, such as the number and position of beams and ribs; and the end rib core block and rib core block can be disassembled or assembled with the plate. The whole mold has high flexibility and can be applied to composite materials with different structures.

[0021] 2. The mold designed in this invention does not require the entire mold to be enclosed during bag making. A 25mm bag-making space is left between the card plate and the core block. The area around the positioning pin hole on the core block has a flat surface that can seal the vacuum bag and isolate a space. This way, the vacuum bag will not leak air when the hole is opened at the pin hole position, and it will not affect the positioning pin on the card plate from passing through for positioning. Since the card plate does not need to be inserted during bag making, the overall surface is flat, greatly avoiding problems such as bridging.

[0022] 3. In the mold designed in this invention, each core block is equivalent to an independent vacuum bag. Utilizing the unidirectional air permeability but resin impermeability of the VAP membrane, air is continuously extracted during the glue injection process, avoiding resin-laden surfaces on the structural components due to resin encapsulation. The mold core blocks also support the beam ribs of the structural components and are custom-designed to ensure the outer surface and dimensions of the structural component ribs. The mold's positioning function also prevents movement and collapse of the precast structural components during vacuuming, avoiding wrinkles. The mold's bagging method reduces the overall bagging difficulty and minimizes the occurrence of resin-rich conditions. Attached Figure Description

[0023] Figure 1 This is an example of a composite structural component that needs to be molded.

[0024] Figure 2 This is a structural diagram of the mold described in this invention.

[0025] Figure 3 This is a schematic diagram showing the usage status of this mold.

[0026] Figure 4 This is a diagram of the connection structure for the positioning card plate.

[0027] Figure 5 This is a diagram showing the state of the mold after vacuum bagging.

[0028] Figure 6 This is a schematic diagram of the ribbed core block structure.

[0029] Figure 7 This is a diagram illustrating the making of a vacuum bag.

[0030] Figure 8 This is an indication of the bagging location.

[0031] Figure 9 This is a schematic diagram of the end rib clamping plate.

[0032] Figure 10 This is a schematic diagram of the beam positioning plate.

[0033] In the diagram, 1. Main mold, 2. End rib core block, 3. End rib positioning plate, 4. Rib positioning plate, 4-1. First rib positioning plate, 4-2. Second rib positioning plate, 5. Beam positioning plate, 6. Rib core block, 6-1. Vacuum bag sealing groove, 6-2. Demolding cloth, 6-3. VAP membrane, 6-4. Sealing strip. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0035] Combined with appendix Figure 2-10 The composite material molding die designed in this application for VARI molding of beam-ribbed structural components includes a main mold 1, an end rib positioning plate 3, a rib positioning plate 4, a beam positioning plate 5, an end rib core block 2, and a rib core block 6, as detailed below:

[0036] Two end rib positioning plates 3 are provided, and the two end rib positioning plates 3 are arranged opposite each other for detachably connecting the end rib core block 2, in conjunction with the attached... Figure 9 As shown, one end of the end rib positioning plate 3 is detachably connected to the main mold 1, and the other end of the end rib positioning plate 3 is detachably connected to the end rib core block 2. The end rib positioning plate 3 and the end rib positioning plate 2 are detachably connected by positioning pins.

[0037] Rib positioning plates 4 are positioned between and parallel to the two end rib positioning plates 3. The number of rib positioning plates 4 is determined according to the number of ribs in the composite material to be molded, and they are used for detachable connection of the rib core block 6. (See attached...) Figure 4 The rib positioning plate 4 consists of two parts: a first rib positioning plate 4-1 and a second rib positioning plate 4-2. One end of the second rib positioning plate 4-2 is detachably connected to the main body mold 1, and the other end of the second rib positioning plate 4-2 is detachably connected to one end of the first rib positioning plate 4-1. The other end of the first rib positioning plate 4-1 is detachably connected to the main body mold 1. There is a gap between the main body of the first rib positioning plate 4-1 and the second rib positioning plate 4-2 and the main body mold 1, and the rib core block 6 is detachably connected to the first rib positioning plate 4-1.

[0038] The beam positioning plate 5 is detachably mounted on the main mold 1 to fix the beams in the composite material; it also fixes the outermost beam in the composite material. (See attached...) Figure 10 The beam positioning plate 5 is a "Z" shaped bent plate, one end of which is detachably connected to the main mold 1, and the other end is detachably connected to the corresponding beam.

[0039] In this application, a vacuum bag sealing groove is formed on the core block 6. A release cloth and a VAP membrane are placed in sequence in the vacuum bag sealing groove and sealed along the groove. At the same time, a vacuum tube is inserted.

[0040] To more clearly illustrate the function of this mold, the following explanation will focus on its working process:

[0041] Only with Figure 1 The following is an example of a composite structural component that needs to be formed. The composite structural component includes four beams arranged in parallel, which are referred to as beam 1, beam 2, beam 3 and beam 4 respectively; there are four ribs between the four beams.

[0042] First of all Figure 2 The main body mold 1 is covered with a skin and pre-compacted. In this embodiment, the beam needs to be pre-formed on the prefabrication mold.

[0043] Place two end rib core blocks 2 and rib preforms on the main body mold 1, connect the end rib positioning plate 3 to the mold body 1, and then connect the end rib core blocks 2 to the end rib positioning plate 3 to position the positions of the two end ribs.

[0044] Install beam positioning plate 5 on the main body mold 1, place the pre-formed beam 1 on the main body mold 1, and then press the beam 1 and beam positioning plate 5 together with bolts to fix the position of the beam 1.

[0045] Place other beams and rib core blocks 6 according to the product beam rib placement, seal auxiliary material on the core blocks, and connect the positioning plates 4-1 and 4-2 of the rib positioning plates 4 as follows. Figure 4 As shown, install it onto the main mold 1, aligning the positioning holes on the rib core block 6 with the positioning holes on the positioning plate 4, and use a large pin for positioning. After all parts are installed in place, as shown... Figure 3 As shown;

[0046] A guide net is laid on the upper surface of the beam and ribs, and air guide pipes are arranged. Then, the bagging process is carried out. The vacuum bag is positioned between the positioning plate 4 and the rib core block 6. During bagging, the vacuum bag is cut and sealed with sealing strip 6-4. After vacuuming, the large pin, the two end rib plates 3, and the positioning plate 4 are removed. The mold is in the following condition after bagging: Figure 5 As shown.

[0047] Finally, the adhesive is injected and cured according to the process.

[0048] The above embodiments are only used to illustrate the design concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, all equivalent changes or modifications made based on the principles and design ideas disclosed in the present invention are within the protection scope of the present invention.

Claims

1. A composite material molding die suitable for VARI molding of beam-ribbed structural components, characterized in that, include: The main mold (1) is covered with a skin and pre-compacted. Two end rib positioning plates (3) are detachably mounted on the main mold (1) and are arranged opposite to each other. Each end rib positioning plate (3) is detachably connected to an end rib core block (2). The two end rib core blocks (2) and the rib preform are placed on the main mold (1), the end rib positioning plates (3) are connected to the main mold (1), and the end rib core blocks (2) are connected to the end rib positioning plates (3) to locate the positions of the two end ribs. A plurality of rib positioning plates (4) are detachably mounted on the main body mold (1). The rib positioning plates (4) are positioned between two end rib positioning plates (3) and are parallel to each other. A rib core block (6) is detachably connected to the rib positioning plate (4). The rib positioning plate (4) consists of two parts: a first rib positioning plate (4-1) and a second rib positioning plate (4-2). One end of the second rib positioning plate (4-2) is detachably connected to the main body mold (1), and the other end of the second rib positioning plate (4-2) is detachably connected to one end of the first rib positioning plate (4-1). The other end of the first rib positioning plate (4-1) is detachably connected to the main body mold (1). There is a gap between the main body of the first rib positioning plate (4-1) and the second rib positioning plate (4-2) and the main body mold (1). A rib core block (6) is detachably connected to the first rib positioning plate (4-1). A detachable beam positioning plate (5) is installed on the main body mold (1). The pre-formed beam is placed on the mold (1), and the beam is pressed with the beam positioning plate (5) by bolts to fix the position of the beam. Other beams and rib core blocks (6) are placed according to the arrangement of the product beam ribs. The core blocks are sealed with auxiliary materials and installed on the main body mold (1). The positioning holes on the rib core blocks (6) are aligned with the positioning holes on the rib positioning plate (4) and positioned with big pins. A vacuum bag sealing groove is provided on the core block (6). A release cloth and a VAP membrane are placed in the vacuum bag sealing groove in sequence and sealed along the vacuum bag sealing groove. At the same time, a vacuum tube is inserted. A flow guide net is laid on the upper surface of the beam and rib and an air guide pipe is arranged. Then the bagging process is carried out. The vacuum bag is positioned between the rib positioning plate (4) and the rib core block (6). When bagging, the vacuum bag is cut and sealed with sealing strip (6-4). After vacuuming, the large pin, the two end rib positioning plates (3) and the rib positioning plate (4) are removed. Finally, the adhesive is injected and cured according to the process.

2. A composite material molding die for VARI-molded beam-ribbed structural components according to claim 1, characterized in that, The number of rib positioning plates (4) is set according to the number of ribs between the two end ribs of the beam rib structure.

3. A composite material molding die for VARI-molded beam-ribbed structural members according to claim 1 or 2, characterized in that, At least one beam positioning plate (5) is provided, and it is evenly distributed between the two end rib positioning plates (3).

4. A composite material molding die for VARI-molded beam-ribbed structural members according to claim 3, characterized in that, The beam positioning plate (5) fixes the outermost beam in the composite material.

5. A composite material molding die for VARI-molded beam-ribbed structural members according to claim 3, characterized in that, The beam positioning plate (5) is a "Z" shaped bent plate, one end of which is detachably connected to the main body mold 1, and the other end is detachably connected to the corresponding beam.

6. A composite material molding die for VARI-molded beam-ribbed structural members according to claim 1, characterized in that, One end of the end rib positioning plate (3) is detachably connected to the main body mold (1), and the other end of the end rib positioning plate (3) is detachably connected to the end rib core block (2).

7. A composite material molding die for VARI-molded beam-ribbed structural members according to claim 1, characterized in that, Pre-formed beams are used in the mold application process.

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