A molding method for large-size, high-facade composite parts

Abstract

This invention discloses a molding method for large-size, high-profile composite parts in the field of composite product technology. The composite part includes a bottom surface and four vertical surfaces, and includes the following steps: 1) mold preparation; 2) laying of reinforcement; 3) laying of vacuum auxiliary materials: nylon release cloth, flow guide net, injection tube, injection seat, and transparent tube are laid sequentially from the inside out. When laying the injection tube on the bottom surface, the injection tube is laid in the same direction as the length of the bottom surface and is laid at intervals from the middle of the bottom surface to the width direction. The length of the injection tube gradually increases from the middle to both sides. The flow guide net is laid in accordance with the area of ​​the injection tube. When laying the injection tube on the vertical surfaces, the injection tube is laid in accordance with the shape of the vertical surface and along the weft direction. The injection seat is evenly placed on the injection tube; 4) encapsulation; 5) vacuuming; 6) injection; 7) curing and molding. This invention solves the problems of difficult molding and low finished product qualification rate of existing large-size, high-profile composite parts.

Description

Technical Field

[0001] This invention relates to the field of composite material technology, and in particular to a method for forming large boxes. Background Technology

[0002] Composite materials are increasingly widely used, especially resin-based composites, which are extensively applied in aerospace, shipbuilding, automotive, construction, electronics, and sporting goods. Composite materials offer high designability, specific strength, and specific modulus. Their performance is often closely related to product quality, which in turn depends on the molding method. Advanced resin-based composite molding processes can be broadly categorized into two types: fiber prepreg molding and preform / liquid molding. Fiber prepreg molding processes mainly include vacuum bag autoclave molding, pressure bag molding, vacuum bag molding, compression molding, filament winding, and pultrusion molding; preform / liquid molding mainly includes resin transfer molding, resin film melt impregnation molding, and vacuum-assisted molding processes.

[0003] Among numerous advanced molding processes, autoclave molding is highly regarded; however, its high raw material and equipment costs, coupled with limitations imposed by equipment size, make it unsuitable for large-scale products. Pressure bag molding, vacuum bag molding, and compression molding suffer from similar issues. Winding and pultrusion processes are limited by product shape; products with shapes such as rotational bodies, rods, and bars can be molded using these processes. In recent years, composite liquid molding processes, including resin transfer molding, resin film impregnation molding, and vacuum-assisted molding, have become research hotspots in this field. First, fiber-reinforced materials are pre-formed and placed in a mold, then a specialized resin system is injected into the mold cavity using vacuum or injection equipment. This type of process can manufacture both large, integral composite components and precision small components; it significantly shortens the component production cycle while ensuring overall component quality. Products manufactured using this process have advantages such as high strength and performance reliability, simple molding process, high production efficiency, smooth surface, and good environmental performance. Vacuum-assisted molding, in particular, is a low-cost molding process for large composite parts.

[0004] How to reduce the processing and manufacturing cost of large-scale composite parts while ensuring product quality is a topic that our technical personnel need to study. The injection window period of resin is usually 1-4 hours. The biggest challenge in the molding process of large-scale composite materials is how to ensure that the entire surface is injected with resin in a short period of time. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a molding method for large-size, high-facade composite parts, solving the problems of difficult molding and low finished product qualification rate of existing large-size, high-facade composite parts.

[0006] The objective of this invention is achieved as follows: a method for molding a large-sized, high-profile composite material component, the box body comprising a bottom surface and four vertical surfaces, comprising the following steps: Step 1) Mold preparation: including surface treatment and airtightness inspection; Step 2) Reinforcement Placement: Place and secure the reinforcement in the mold according to the layup schedule. During layup, lay the fabric from top to bottom along the mold. When the warp direction of the fabric is the same as the direction of gravity, the free end of the fabric needs to be fixed. When the weft direction of the fabric is the same as the direction of gravity, if the fabric width is insufficient to reach the bottom of the mold, it needs to be spliced. When splicing, the upper and lower layers need to be sewn together for reinforcement, and the seams between layers should be avoided to be the same. During layup, self-spraying adhesive should be sprayed between the fabric layers to increase the bonding strength between the fabric layers. Step 3) Laying of vacuum auxiliary materials: Lay out the nylon release cloth, flow guide net, injection tube, injection seat and transparent tube in sequence from the inside to the outside. When laying the injection tube on the bottom surface, the injection tube is laid in the same direction as the length of the bottom surface and is laid at intervals from the middle of the bottom surface to the width direction. The length of the injection tube gradually increases from the middle to both sides. The flow guide net is laid in accordance with the area of ​​the injection tube. When laying the injection tube on the vertical surface, the injection tube is laid in accordance with the shape of the vertical surface and is laid along the weft direction. The injection seat is evenly placed on the injection tube. Step 4) Packaging: Make a vacuum bag, and tightly compress the vacuum auxiliary material, reinforcement and mold to form a vacuum negative pressure; Step 5) Vacuuming: Use a vacuum pump to evacuate the vacuum bag, check for leaks, and remove air between the reinforcement and the mold; Step 6) Resin injection: Adjust the resin ratio and inject the resin into the injection tube in sequence; Step 7) Curing and molding: Curing according to the resin requirements; Step 8) Inspection: Check whether the hardness, thickness and appearance meet the requirements; Step 9) Demolding and cutting to obtain the desired product.

[0007] As a further limitation of the present invention, step 3) requires an injection speed test before laying the injection pipe. In the same site, a flat plate of the same size is made using the same layering and pipe laying method. The injection pipe and guide net are laid on it to conduct the injection speed test. After calculating the injection speed, the laying of the bottom injection pipe is arranged according to the injection speed.

[0008] As a further limitation of the present invention, when laying the release cloth in step 3), it is necessary to fully cover the entire reinforcement area and extend outward for a period of time.

[0009] As a further limitation of the present invention, after the glue injection tube is laid in step 3), it is folded in a Z-shape and fixed to prevent air leakage.

[0010] As a further limitation of the present invention, step 6) requires that the adhesive solution be prepared according to the temperature and humidity of the site before injection, and a gelation test must be conducted before preparation.

[0011] As a further limitation of the present invention, step 6) the glue injection plan is as follows: when injecting glue on the bottom surface, start from the middle of the bottom, first inject glue through the middle glue injection tube, and then inject glue through the remaining glue injection tubes on both sides at the same time; when the bottom surface is filled, start injecting glue on the four vertical surfaces at the same time, and inject glue on the columns from bottom to top.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is designed for high facades and can effectively ensure the laying of reinforcements; it solves the problem of difficult molding of large-size composite parts; for multi-facade structures, by rationally planning the flow guide net and the placement of the glue injection port, the glue injection is carried out in the process of first the bottom surface and then the facade, and the final product has a beautiful appearance, uniform thickness, uniform color and high strength. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0014] Figure 1 This is a flowchart of the present invention.

[0015] Figure 2 This is a schematic diagram of the composite material structure in this invention.

[0016] Figure 3 This is a side view of the composite material component in this invention.

[0017] Figure 4 This is an end view of the composite material component in this invention.

[0018] Figure 5 This is the layup sequence table for this invention.

[0019] Figure 6 This is a schematic diagram showing the laying of the glue injection tube on the bottom surface of the composite material part of the present invention.

[0020] Figure 7 This is a schematic diagram of the adhesive injection tube laying on the side elevation of the composite component of the present invention.

[0021] Figure 8 This is a schematic diagram of the adhesive injection tube laying on the front vertical surface of the composite component of the present invention.

[0022] Figure 9 This is a schematic diagram of the adhesive injection tube laying on the rear vertical surface of the composite component of the present invention.

[0023] The components include: 100 for the bottom surface, 200 for the elevation, 300 for the glue injection tube, and 400 for the glue injection base. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0025] like Figure 1 The method shown is a molding method for a large-size, high-facade composite component, such as... Figure 2-4 As shown, the dimensions of the composite component are 11m × 10m × 5m. This composite component is used in a composite boat and is a single-compartment structure, including a bottom surface 100 and four vertical surfaces 200. The bottom surface 100 is a V-shaped square plate structure with a certain slope, and the top surface is flat. The process includes the following steps: Step 1) Mold preparation: 1-1) Erect scaffolding for the vertical transport of personnel and materials; 1-2) Glue a 40mm wide and 25mm thick wooden strip onto the horizontal flange of the mold edge. Use strong AB glue (high-performance acrylic structural adhesive). 1-3) The mold uses a metal mold, which is easier to assemble and recycle compared to composite molds of the same size. First, the surface of the mold needs to be checked for air tightness. After the air tightness is qualified, PTFE single-sided adhesive release cloth is pasted on. When pasting the release cloth, the seams are butted together. Step 2) Laying out the reinforcement: 2-1) The reinforcement consists of alkali-free axial fiberglass cloth and alkali-free chopped strand mat, with a total thickness of 28 mm. The layup angles are 0°, 90°, 45° and -45°, with a ratio of 3:2:2:2. 2-2) The layup sequence is shown in the layup table, see Appendix Figure 5 ; 2-3) When laying the layers, place the fabric from top to bottom along the mold. When the warp direction of the fabric is the same as the direction of gravity, the free end of the fabric needs to be fixed to the wooden block with a 20mm screw. When the weft direction of the fabric is the same as the direction of gravity, the width of the fabric is insufficient to reach the bottom of the mold and splicing is required. The overlap width during splicing is 25mm-50mm. When splicing, the upper and lower layers need to be reinforced by sewing with cotton thread. At the same time, the seams between layers should be avoided to be the same. When laying the layers, self-spraying adhesive should be sprayed between the fabric layers to increase the bonding strength between the fabric layers. It should be noted that using wooden blocks and cotton thread to fix the fiber cloth can avoid spraying a large amount of adhesive on the surface of the fiber cloth, and when the number of fiber cloth layers increases, it can effectively resist the effects of gravity.

[0026] 2-4) Note that when selecting cotton thread or spray adhesive, it is necessary to avoid chemical reactions with resin.

[0027] Step 3) Laying of vacuum auxiliary materials: The laying of vacuum auxiliary materials often reflects the flow guiding design. Vacuum auxiliary materials include nylon release cloth, PE flow guiding net, PE injection tube 300, PE injection seat 400, transparent PU tube and PE spiral tube.

[0028] Bottom-guided design is crucial. The glue injection plan starts from the center along the length and spreads outwards in a relay-style manner. Nylon release fabric, a flow guide net, a glue injection tube 300, and a glue injection seat 400 are sequentially placed on the surface of the reinforcement to create a vacuum pressure bag. Nylon release fabric is laid on the surface of the fiber cloth, followed by the flow guide net. The glue injection tube 300 and glue injection seat 400 are then placed on the flow guide net. The glue injection speed is controlled by adjusting the distance of the glue injection tube 300, the area of ​​the flow guide net, and the length of the glue injection tube 300.

[0029] It should be noted that when the bottom surface 100 and the vertical surface 200 are injected with resin at the same time, it is necessary to avoid the injection speed getting out of control. Ideally, after the bottom surface 100 is filled with resin, the resin should "advance" in a straight line from one end of the vertical surface 200 to the other end along the four sides of the bottom surface 100.

[0030] First, adjust the bottom glue injection speed: like Figure 6 As shown, the first injection tube 300 is laid in the middle of the V-shaped bottom surface 100 along the fiber cloth at 0° (in this embodiment, 0° means parallel to the length direction of the bottom surface 100). The bottom surface 100 is lower in the middle and higher on both sides, which can make full use of the mold orientation to facilitate the placement of other injection tubes 300.

[0031] The remaining 300 injection tubes are placed along the width direction, with one tube spaced 400mm apart, eight tubes placed at the top and eight at the bottom, for a total of 16 300 injection tubes.

[0032] At the start of resin injection, an injection speed test must be conducted. A flat plate is fabricated in the same location using the same layup and pipe laying method. The plate can be 635mm wide (half the axial fabric width) and its length is the width of the base plate. Half of the plate has a flow guide net laid on it, while the other half does not. The test has two objectives: first, to test the injection speed of the resin under different conditions; and second, to test the completion time of resin injection on the flat plate.

[0033] Based on the completion time on both sides of the plate: the side with the guide net was completed in 2 hours and 5 minutes, with an average glue injection time of 15 minutes per pipe. The side without the guide net was completed in 4 hours and 10 minutes, with an average glue injection time of 31 minutes per pipe. Observation revealed that on the side without the guide net, the glue injection speed was related to the distance of the glue injection tube 300; at the instant the glue injection tube 300 was opened, the glue injection speed was 4 cm / min, which could be sustained for 5 minutes; when the distance exceeded 20 cm, the forward speed was 0.8 cm / min.

[0034] It should be noted that laying out a flow guide net and increasing the number of injection nozzles can both increase the injection speed.

[0035] The completion time of flat plate glue injection can be regarded as the completion time of bottom glue injection. The key to bottom glue injection is that the time for filling all four sides of the bottom should be the same. Usually, the window period of resin is 1-4 hours. In order to ensure that the glue injection in the width direction is completed within 2 hours, and the glue injection in the length direction is completed within 2 hours, it is necessary to complete the glue injection in all four sides in a short time. The speed needs to be accelerated in the width direction and the speed needs to be decelerated in the length direction.

[0036] Calculations show that the first injection tube 300 needs to be shortened to increase the distance between its end and the bottom edge. The estimated distance is s1 = 20 + ((125-5) * 0.8) = 116 cm.

[0037] And so on.

[0038] The second injection tube 300 also needs to be shortened to increase the distance between its end and the bottom edge. The estimated distance is s2 = 20 + ((125-5-15) * 0.8) = 104 cm.

[0039] The third injection tube 300 also needs to be shortened to increase the distance between its end and the bottom edge. The estimated distance is s3 = 20 + ((125 - 5 - 15 * 2) * 0.8) = 92cm.

[0040] The fourth injection tube 300 also needs to be shortened and its end distance to the bottom edge increased. The estimated distance is s4 = 20 + ((125 - 5 - 15 * 3) * 0.8) = 80cm.

[0041] The fifth injection tube 300 also needs to be shortened to increase the distance between its end and the bottom edge. The estimated distance is s5 = 20 + ((125 - 5 - 15 * 4) * 0.8) = 68cm.

[0042] The sixth injection tube 300 also needs to be shortened and its end distance to the bottom edge increased. The estimated distance is s6 = 20 + ((125 - 5 - 15 * 5) * 0.8) = 56 cm.

[0043] The 7th injection tube 300 also needs to be shortened to increase the distance between its end and the bottom edge. The estimated distance is s7 = 20 + ((125 - 5 - 15 * 6) * 0.8) = 44 cm.

[0044] The 8th injection tube 300 also needs to be shortened to increase the distance between its end and the bottom edge. The estimated distance is s8 = 20 + ((125 - 5 - 15 * 7) * 0.8) = 32cm.

[0045] After adjusting the dispensing tube to 300, therefore according to Figure 3 As shown, the guide net and glue injection tube 300 are cut in the bottom left and right areas to form two triangular areas without the guide net and glue injection tube 300 as speed control zones. The projected height of the triangular area is 104cm and the width is the same as the bottom surface 100, as shown in Figure 1.

[0046] It should be noted that the design of the speed regulating belt increases the time for resin to reach the bottom edge in the 300-degree direction of the parallel dispensing tube and shortens the time for resin to reach the bottom edge in the 300-degree direction of the vertical dispensing tube. This allows the adhesive to reach the edge almost simultaneously during the dispensing process, ensuring that the bottom four sides are filled in the same time.

[0047] Further adjust the area of ​​the 200mm guide net on the four facades. Place an air extraction pipe (or air outlet) on one side of the top of each 200mm facade as an air outlet. Cut the guide net 200mm inward from the other three sides and leave the guide net in the 200mm inward area along the three sides as a buffer zone. This will prevent the glue injection time of the four 200mm facades from being asynchronous after the bottom glue injection is completed, and also prevent the glue injection of the four 200mm facades from affecting each other.

[0048] Figure 7 The upper facade 200 has the same structure as the lower facade 200. The facade 200 can be regarded as a trapezoid with an included angle of 4° between the two sides. The first injection tube 300 is arranged at the top starting 400mm from the top of the mold. Then, an injection tube 300 is arranged every 400mm, while being offset at a certain angle, for a total of 9 tubes. The last injection tube 300 is arranged at the bottom starting 200mm from the bottom edge.

[0049] Figure 8 The front facade 200 has an angle of 5° between its top and bottom edges. The first injection tube 300 is arranged at the top, starting 400mm from the top of the mold. Then, an injection tube 300 is arranged every 400mm, while being offset at a certain angle, for a total of 8 tubes. The last injection tube 300 is arranged at the bottom, starting 200mm from the bottom edge.

[0050] Figure 9It is the rear facade 200, where the included angle between the upper and lower sides of the facade 200 is 2°. The injection tube 300 starts to be arranged from 400 mm away from the upper end of the mold at the top as the first injection tube 300, and then an injection tube 300 is arranged every 400 mm and deflected at a certain angle. A total of 11 injection tubes are arranged. The injection tube 300 starts to be arranged from 200 mm upward from the bottom edge at the bottom as the last injection tube 300.

[0051] It should be noted that during actual injection, slight angular deviations between the injection tubes 300 do not affect the resin injection speed between adjacent two diversion tubes. The injection time of the injection tubes 300 at the same position can be kept the same, and finally it can be ensured that the resin reaches the top of the mold simultaneously.

[0052] The following points need to be noted in the above process: a. Laying nylon release cloth: It needs to be fully covered, covering the entire fiber reinforcement area and extending 30 cm outward.

[0053] b. When injecting glue, use transparent PU tubes, which are convenient for observing the glue injection situation and detecting air leakage. And this material is resistant to folding and recyclable. Each injection seat 400 needs to be equipped with 1 m of PU tube. The PU tube is folded in a Z shape to prevent air leakage and is fixed with paper tape. When the PU tube needs to be opened, just cut the paper tape; the PU tube needs to be folded well for standby.

[0054] c. The PE spiral tubes are placed along the four sides of the mold, 15 cm away from the dry cloth, and need to be wrapped up and down with the release cloth. An injection seat 400 is placed every 2 m. The product is 11 m long and 10 m wide, and 4 injection seats are placed on each side for air extraction use.

[0055] Step 4) Encapsulation: Use nylon vacuum film to make a vacuum bag, the purpose of which is to tightly compact the vacuum auxiliary materials, reinforcements and the mold; to prevent the vacuum bag from being damaged, a double bag needs to be made.

[0056] Step 5) Vacuum pumping: Use a vacuum pump to pump vacuum. A buffer tank needs to be connected between the vacuum pump and the buffer tube to prevent resin backflow. The buffer tank is equipped with a pressure gauge. When pumping vacuum, it is necessary to check whether the vacuum bag leaks air. After the vacuum is stable, close the air inlet valve of the buffer tank. If the vacuum does not drop within 10 minutes, it is qualified. After passing the qualification, it is still necessary to continue pumping vacuum for 24 hours to further evacuate the air.

[0057] Step 6) Resin introduction: a. The specific ratio of the resin needs to be determined according to the on-site temperature and humidity. Therefore, it is necessary to conduct a gel test before each injection. The specific method is: Weigh at least 3 portions of vinyl resin at the operation site, and carry out resin gel tests under multiple ratios within the range of resin: curing agent of 100: (1 - 2), and then select a resin formula with an appropriate gel time for the subsequent process.

[0058] b. Resin Injection Plan: When injecting resin into the bottom, use four 300mm injection tubes, starting from the center of the bottom. Then, add four more 300mm injection tubes to inject resin simultaneously to the left and right sides. The resin gelation time should be controlled within 3 hours. After the bottom 100mm is filled, simultaneously begin injecting resin into the four vertical 200mm surfaces, also using four 300mm injection tubes. The gelation time should be controlled within 1.5 hours. This is to prevent resin from accumulating downwards.

[0059] c. When injecting glue, start from the center. According to the calculation results, the injection time for each 300mm glue tube is 15-20 minutes.

[0060] d. Once the resin reaches the edge of the mold, stop injecting the resin and continue vacuuming until the product is fully cured.

[0061] Step 7) Curing: This invention uses vinyl resin, which can be cured at room temperature; after the product is cured, it cannot be demolded immediately, and vacuuming must continue for 24 hours to prevent product deformation; Step 8) Inspection: Check the product's appearance, hardness, and thickness; Step 9) Remove the mold and cut off the excess material to obtain the desired product.

[0062] The present invention adopts the above technical solution, and compared with the prior art, the beneficial effects are as follows: For high facades of 200mm (maximum height 4.8m), the mold can effectively ensure the placement of reinforcements; For multi-faceted structures, by rationally planning the flow guide net and the placement of the glue injection port, the glue injection is carried out in the process of first the bottom surface and then the top surface. The final product has a beautiful appearance, uniform thickness, uniform color and high strength.

[0063] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A method for molding a large-sized, high-profile composite material, the composite material comprising a bottom surface and four vertical surfaces, characterized in that, Includes the following steps: Step 1) Mold preparation: including surface treatment and airtightness inspection; Step 2) Reinforcement Placement: Place and secure the reinforcement in the mold according to the layup schedule. During layup, lay the fabric from top to bottom along the mold. When the warp direction of the fabric is the same as the direction of gravity, the free end of the fabric needs to be fixed. When the weft direction of the fabric is the same as the direction of gravity, if the fabric width is insufficient to reach the bottom of the mold, it needs to be spliced. When splicing, the upper and lower layers need to be sewn together for reinforcement, and the seams between layers should be avoided to be the same. During layup, self-spraying adhesive should be sprayed between the fabric layers to increase the bonding strength between the fabric layers. Step 3) Laying Vacuum Assist Materials: Lay the nylon release fabric, flow guide net, injection tube, injection seat, and transparent tube sequentially from the inside out. When laying the injection tube on the bottom surface, the injection tube should be laid in the same direction as the length of the bottom surface and laid at intervals from the middle of the bottom surface towards the width. The length of the injection tube should gradually increase from the middle to both sides. Cut the flow guide net and injection tube in the left and right areas of the bottom to form two triangular areas without flow guide nets and injection tubes as speed adjustment zones. Adjust the area of ​​the flow guide net on the four vertical surfaces. Place one side of the top of each vertical surface as the air outlet side. For the extraction pipe, the area within 200mm inward on the other three sides is not covered with a guide net, serving as a buffer zone. The guide net is laid in coordination with the area where the glue injection pipe is laid. When laying the glue injection pipe on the vertical surface, the glue injection pipe is laid in accordance with the shape of the vertical surface and along the latitudinal direction. The glue injection seat is evenly placed on the glue injection pipe. Step 3) Before laying the glue injection pipe, a glue injection speed test needs to be conducted. In the same site, a flat plate of the same size is made using the same layering and pipe laying method. The glue injection pipe and guide net are laid on it to conduct a glue injection speed test. After calculating the glue injection speed, the laying of the bottom glue injection pipe is arranged according to the glue injection speed. Step 4) Packaging: Make a vacuum bag, and tightly compress the vacuum auxiliary material, reinforcement and mold to form a vacuum negative pressure; Step 5) Vacuuming: Use a vacuum pump to evacuate the vacuum bag, check for leaks, and remove air between the reinforcement and the mold; Step 6) Glue Injection: Adjust the resin ratio and introduce the resin into the injection tube in sequence. The glue injection plan for Step 6) is as follows: When injecting glue on the bottom surface, start from the middle of the bottom, inject glue into the middle injection tube first, and then inject glue into the remaining injection tubes on both sides at the same time; when the bottom surface is filled, start injecting glue on the four vertical surfaces at the same time, and inject glue on the vertical surfaces from bottom to top. Step 7) Curing and molding: Curing is carried out according to the resin requirements.

2. The molding method for a large-size, high-facade composite component according to claim 1, characterized in that, Step 3) When laying the release fabric, it should fully cover the entire reinforcement area and extend outwards for a period of time.

3. A method for forming a large-size, high-facade composite component according to claim 1 or 2, characterized in that, Step 3) After the glue injection tube is laid, fold it in a Z-shape and fix it to prevent air leakage.

4. A method for forming a large-size, high-facade composite component according to claim 1 or 2, characterized in that, Step 6) Before applying the adhesive, the adhesive solution needs to be prepared according to the temperature and humidity of the site. A gel test needs to be conducted before preparation.

Images