A cellular potting system and method

Abstract

The application relates to the technical field of composite product manufacturing, in particular to a honeycomb pouring and sealing system and a pouring and sealing method, the honeycomb pouring and sealing system comprises a mold, a honeycomb, a flow guide transmission mechanism and a stop block, a vacuum bag is arranged above the honeycomb, a sealing rubber strip connected with the vacuum bag is arranged outside the stop block and surrounds the honeycomb, joints for connecting a vacuum pump or a glue injection mechanism are arranged at intervals in a pouring and sealing area on the honeycomb, the flow guide transmission mechanism comprises a bottom peelable cloth arranged below the honeycomb and a bottom air guide grid plate arranged below the bottom peelable cloth, the flow guide transmission mechanism further comprises a top peelable cloth arranged above the honeycomb and a top flexible flow guide net arranged above the top peelable cloth, and the application also discloses a pouring and sealing method using the system, the application realizes precise coupling of component size and process parameters, ensures the improvement of pouring and sealing quality and efficiency, and needs strict monitoring of parameter execution in actual application, and the parameters are fine-tuned and optimized according to the structural characteristics of the honeycomb.

Description

Technical Field

[0001] This invention relates to the field of composite material product manufacturing technology, specifically to a honeycomb potting system and potting method. Background Technology

[0002] In the field of composite material manufacturing, metal core bonded parts typically use 20-100mm thick aluminum honeycomb as the core material. They are bonded together with the upper and lower metal panels to form an integral structure. These parts are reinforced by local potting technology to strengthen weak points in the structure and reinforce the installation area. They are widely used in aircraft structural components such as aircraft doors, floor parts, and wing components, as well as key parts such as the core nacelle cover of aero-engines and the air intake docking area. This structural design can effectively reduce the weight of the aircraft, improve the structural strength and fatigue performance, and enhance the overall sealing performance.

[0003] However, existing honeycomb potting processes require placing a process skin as a temporary carrier on the underside of the honeycomb during the curing stage, and then applying the potting solution using a scraper. This method has several drawbacks: First, the process skin is easily contaminated by the potting adhesive after use, and the cured potting adhesive is difficult to remove completely, making it impossible to reuse the process skin. New materials must be replaced each time the process is potted, which significantly increases material procurement costs. Second, the laying and disassembly of the process skin is cumbersome, which significantly increases labor and time costs.

[0004] In addition, due to the closed nature of the honeycomb lattice, the process skin, potting compound, and honeycomb lattice form a closed space, making it difficult for internal air pressure to escape. When the potting compound enters, it will cause air resistance, which seriously hinders the potting process. At the same time, the honeycomb structure itself has poor air conduction performance, and residual gas cannot be discharged in time, which can easily lead to potting defects such as voids and delamination. These problems seriously affect the final performance and reliability of the parts. These problems not only reduce product quality, but also bring high rework costs.

[0005] In the existing technology, no effective solution has been found for the deep potting problem of thick aluminum honeycomb. The potting adhesive is difficult to penetrate into the deep layer of the honeycomb, and the superimposed effect of air resistance makes it difficult to guarantee the potting quality. Therefore, there is an urgent need for a solution that can solve both cost and quality problems at the same time to promote the progress of composite material manufacturing technology. Summary of the Invention

[0006] To address the problems existing in the prior art, the present invention provides a honeycomb potting system and potting method to solve the problem of poor potting quality in existing systems.

[0007] To solve the above problems, the technical solution of the present invention is as follows: a honeycomb potting system includes a mold, a honeycomb is provided above the mold, the honeycomb is connected to a flow guiding and transmission mechanism, and a plurality of blocks for fixing the honeycomb is provided above the honeycomb, a vacuum bag is provided above the honeycomb, a sealing strip connected to the vacuum bag is provided outside the blocks and around the honeycomb, and connectors for connecting a vacuum pump or a glue injection mechanism are provided at intervals in the potting area on the honeycomb.

[0008] Furthermore, the flow guiding and transmission mechanism includes a bottom peelable fabric and a bottom air guide plate arranged sequentially from top to bottom below the honeycomb, and a top peelable fabric and a top flexible flow guiding net arranged sequentially from bottom to top above the honeycomb.

[0009] Furthermore, the bottom air guide plate has a grid size of 1 / 3 to 1 / 5 of the honeycomb grid size, a wall thickness of 1 / 4 to 1 / 2 of the grid size, and a height tolerance of ±0.15mm to the product skin thickness. An exhaust hole with a diameter of 1-2mm is provided on the side wall of the bottom air guide plate.

[0010] Furthermore, the top flexible guide net is made of a polymer material with a mesh size of 0.5-5mm and a wire diameter of 0.1-0.5mm, and the top flexible guide net is placed radially along the direction of adhesive flow.

[0011] Furthermore, the dispensing mechanism includes a dispensing tube connected to the connector, a dispensing container, and potting compound.

[0012] Furthermore, the weight of the bottom peelable fabric is 80-120 g / m², and the weight of the top peelable fabric is 30-50 g / m².

[0013] Furthermore, the basic spacing of the joints is 300-350mm, corresponding to a potting width of 100-150mm; for every 50mm increase in potting width, the spacing between joints is shortened by 100mm; for every 50mm decrease in potting width, the spacing between joints is increased by 100mm, with a maximum spacing not exceeding 500mm.

[0014] A honeycomb filling method, employing the aforementioned honeycomb filling system, includes the following steps.

[0015] S1. Component laying and positioning: Lay the bottom air guide plate, bottom peelable fabric, honeycomb, top peelable fabric and top flexible flow guide net on the mold in sequence, and set the baffle around the honeycomb for limiting support;

[0016] S2. Vacuum system establishment: Place sealing strips around the honeycomb, cover with a vacuum bag to form a closed vacuum space, and arrange the joints according to the preset spacing;

[0017] S3. Injection process control: Injecting potting compound through the connector, guiding and controlling the flow of potting compound under the action of vacuum pump, monitoring the honeycomb filling status in real time, and adjusting the injection parameters;

[0018] S4. Cyclic filling and switching: After completing the filling of a local area, switch the dispensing tube to the adjacent connector and repeat the cycle of filling-flowing-refilling until the overall potting is completed.

[0019] Furthermore, in S3, the flow of the potting compound is controlled in stages according to the cell height:

[0020] For honeycomb structures with a thickness of less than 20 mm, the flow rate is 40-80 cm / min;

[0021] Honeycomb with a thickness between 20-50 mm and a flow rate of 30-50 cm / min;

[0022] Honeycomb (03) with a thickness between 50-80 mm, and a flow rate of 20-40 cm / min;

[0023] For honeycomb structures with a thickness greater than 80 mm, the flow rate is 10-30 cm / min.

[0024] Furthermore, in S3, a segmented control strategy is adopted for injecting potting compound:

[0025] Reduce the flow rate by 30%-40% during the initial injection phase to avoid air entrapment.

[0026] The filling process should proceed at a constant speed to ensure that the flow front is straight;

[0027] Near the end, reduce the flow rate to 30% of the normal value to prevent vacuuming and bubble suction.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The device employs a flow guiding mechanism to form an efficient exhaust and flow guiding channel. Combined with a vacuum bag and vacuum pump, it quickly exhausts the gas inside the honeycomb cells, eliminating air resistance and reducing voids and delamination defects. The top flexible flow guiding net only covers the potting area, achieving "flow guiding with net, no net obstruction," precisely controlling the potting range, avoiding glue overflow, and reducing post-processing steps. The dispensing head and vacuum head are connectors with a universal structure and adjustable spacing, adapting to products of different sizes and improving the device's versatility.

[0030] Vacuum negative pressure drive replaces traditional scraping coating, and in conjunction with a flow guiding and transmission mechanism, the potting compound quickly and evenly wets deep pores, solving the problem of incomplete filling and improving potting efficiency; flow rate graded control (based on honeycomb thickness) and a segmented dispensing strategy (initial, filling, and final deceleration) avoid air entrapment and bubble absorption, ensuring uniform filling; cyclic switching between dispensing heads and vacuum heads enables multi-area cyclic filling, adapting to large areas and complex structures, ensuring complete potting of the entire area; simplified process flow, reduced operations such as process skin replacement, shortened production cycle, reduced rework costs, and improved product consistency and reliability. Attached Figure Description

[0031] Figure 1 This is a cross-sectional view of the structure of the present invention;

[0032] Figure 2 This is an enlarged cross-sectional view of the present invention;

[0033] Figure 3 This is a schematic diagram of the dispensing head and vacuum head of the present invention;

[0034] Figure 4 This is a schematic diagram of the bottom air guide plate of the present invention;

[0035] Figure 5 This is a schematic diagram of the top flexible guide net of the present invention;

[0036] Figure 6 This is a schematic diagram of the flow direction of the potting compound of the present invention;

[0037] Figure 7 This is a schematic diagram of the potting area of ​​the present invention;

[0038] Figure 8 This is a schematic diagram illustrating the completion of one round of adhesive injection according to the present invention.

[0039] In the diagram: 01. Bottom air guide grid; 02. Bottom peelable fabric; 03. Honeycomb; 04. Top peelable fabric; 05. Top flexible flow guide net; 06. Sealing strip; 07. Vacuum bag; 08. Mold; 09. Block; 10. Injection head; 11. Adhesive container; 12. Injection tube; 13. Vacuum head; 14. Encapsulating adhesive; 15. Flow direction towards the core cell; 16. Filling towards the core cell; 17. Flow direction towards the vacuum source; 18. Adjacent unsaturated core cells; 19. Joint spacing; 20. Encapsulation width; 21. Initial filling area; 22. Adjacent area to be encapsulated; 23. Vent hole; 24. Grid height; 25. Mesh size; 26. Wall thickness; 27. Mesh size; 28. Wire diameter; 29. ​​Flow guide net radial direction. Detailed Implementation

[0040] The honeycomb 03 potting system adopts a multi-layer composite structure design. Based on the mold 08 platform, it achieves high-quality potting of the honeycomb 03 structure through the coordinated work of the flow guiding and transmission mechanism, vacuum sealing system and glue injection mechanism. The core of the system lies in solving the problems of air resistance, uneven glue penetration and high cost in traditional processes through material innovation and structural optimization.

[0041] Cellular potting system such as Figure 1 , 2 As shown in Figure 3, the system includes: mold 08 as the bottom supporting foundation of the entire system; honeycomb 03 horizontally placed above mold 08 in the center; stop blocks 09 arranged around the edge of honeycomb 03, fitting against the sidewall of honeycomb 03 and fixed to the surface of mold 08, forming a circumferential limit for honeycomb 03; the flow guiding and transmission mechanism is arranged in two layers: the lower layer component is located between honeycomb 03 and mold 08, and from top to bottom, it consists of bottom peelable fabric 02 and bottom air guide plate 01. The bottom air guide plate 01 is laid flat on the surface of mold 08, and the bottom peelable fabric 02 covers the bottom air guide plate 01 and fits against the bottom of honeycomb 03; the upper layer component is located above honeycomb 03, and from bottom to top, it consists of top peelable fabric 02 and bottom air guide plate 01. Fabric 04 and top flexible guide net 05 are attached to the top potting area of ​​honeycomb 03. Top flexible guide net 05 covers the top peelable fabric 04 and is laid only in the potting area. Sealing strip 06 is laid continuously along the outside of block 09 and the edge of mold 08. Vacuum bag 07 covers the upper component, block 09 and sealing strip 06, and its edge is tightly attached to the sealing strip 06 to form a closed cavity. Joint spacing 19 is set through vacuum bag 07 and distributed in the potting area of ​​honeycomb 03. One end of the glue injection tube 12 of the glue injection mechanism is sealed to the joint, and the other end extends to the outside of the system and is connected to glue container 11. The joint can be selectively connected to vacuum pump.

[0042] Taking the 20-100mm thick aluminum honeycomb 03 partial potting of the core compartment cover of an aero-engine as an example, this application achieves high-quality and high-efficiency potting through precise matching of component dimensions and process parameters, as detailed below:

[0043] I. Component Selection and Dimension Determination

[0044] Mold 08: Directly adopts the final part forming tooling, without the need for additional customization, ensuring that the surface accuracy of the part after potting is consistent with the finished product requirements.

[0045] Bottom air guide plate 01: Made of polytetrafluoroethylene (PTFE), this material has good rigidity and does not adhere to the potting compound 14. It can be reused after cleaning, solving the problem of the process skin being difficult to reuse due to contamination by the potting compound 14, greatly reducing the cost per use. At the same time, it reduces the manual operation and time costs of frequent skin replacement, improves production efficiency, and further reduces the overall cost. The height 24 of the bottom air guide plate 01 is consistent with the thickness of the product skin, with a tolerance controlled within ±0.15mm. Excessive height deviation will cause uneven support of the honeycomb 03, affecting the vacuum pressure distribution and the stability of the adhesive flow; Figure 4 As shown, the grid size 25 is 1 / 3 to 1 / 5 of the honeycomb 03 cell size. If the grid is too small (<1 / 5), it will hinder gas discharge; if it is too large (>1 / 3), the support will be insufficient, which will easily lead to deformation of the honeycomb 03. The wall thickness 26 is 1 / 4 to 1 / 2 of the grid size 25. If the wall thickness 26 is too thin, it will be easily deformed; if it is too thick, it will reduce the ventilation cross-sectional area and affect the exhaust efficiency. The diameter of the exhaust hole 23 is 1-2 mm, and it is opened at the bottom or middle of the grid wall. When the diameter is <1 mm, the exhaust resistance is large; >2 mm will weaken the rigidity of the guide net.

[0046] Bottom peelable fabric 02: Use dense material with a weight of 100 g / m². If the weight is too low (<80 g / m²), it will easily seep glue and contaminate the flow guide net. If it is too high (>120 g / m²), it will hinder the flow of gas. The size is slightly larger than the bottom air guide grid 01, 4-10 mm is enough to ensure complete coverage and protection.

[0047] Top peelable fabric 04: Use a loose material with a weight of 40 grams per square meter. Too high a weight will hinder the penetration of the adhesive; too low a weight will lose its protective function. The size is completely flush with the top flexible guide net 05.

[0048] Top Flexible Guide Net 05: Based on the curing temperature of the potting compound (if the curing temperature is 40℃, select polypropylene material), such as... Figure 5 As shown, the mesh size 27 is set to 3mm, and the wire diameter 28 is 0.3mm. Mesh sizes <0.5mm are prone to clogging; mesh sizes >5mm result in uneven flow. The wire diameter 28 affects flexibility and durability. It is only laid in the honeycomb 03 potting area. During laying, the radial direction 29 of the flow guide mesh is arranged along the preset adhesive flow direction. An incorrect direction will increase flow resistance and lead to uneven filling.

[0049] Stop 09: Made of hard plastic, four stops are evenly arranged around the edge of the honeycomb 03, with the spacing adjusted according to the size of the honeycomb 03 to ensure that the honeycomb 03 is restricted from sliding.

[0050] Sealing strip 06: Made of high-temperature resistant silicone, with a cross-sectional size of 10mm×10mm, it is laid continuously along the edge of mold 08 without any breaks to ensure vacuum.

[0051] Vacuum bag 07: Made of transparent polyamide material, 0.15mm thick, with a coverage area extending 50mm beyond the edge of sealing strip 06.

[0052] Connector: A universal quick connector is used; the dispensing head 10 is compatible with the vacuum head 13 for easy operation. The base spacing is set at 320mm (suitable for potting width 20, size 120mm). Figure 7 As shown, if the potting width 20 increases to 170mm, the spacing is shortened to 220mm; if the potting width 20 decreases to 70mm, the spacing increases to 420mm, and the maximum spacing does not exceed 500mm.

[0053] Injection mechanism: The diameter of the injection tube 12 is selected according to the total length of the vacuum channel. For medium-sized products (total length of vacuum channel is 2 meters), a 14mm diameter injection tube 12 is selected; the volume of the glue container 11 is 5L; the potting glue 14 is selected with a suitable viscosity of epoxy potting glue 14, and the viscosity does not exceed 1.0 Pa.s. If it is too viscous, it cannot be pumped. The viscosity can be improved by temperature. In production, the viscosity will usually decrease by half for every 10°C increase in temperature.

[0054] II. Implementation Steps of the Filling and Sealing Method

[0055] S1. Component Laying and Positioning

[0056] Lay the components in the following order: “Mold 08 → Bottom Air Guide Plate 01 → Bottom Peelable Fabric 02 → Honeycomb 03 → Top Peelable Fabric 04 → Top Flexible Flow Guide Net 05”. Ensure that each component fits tightly. The bottom peelable fabric 02 completely covers the bottom air guide plate 01. The top flexible flow guide net 05 is precisely aligned with the filling area. The baffle 09 is placed around the honeycomb 03, with the distance between it and the side wall of the honeycomb 03 controlled at 2mm to achieve limiting support.

[0057] S2, Vacuum system establishment

[0058] Press the sealing strip 06 firmly along the edge of the mold 08, cover the vacuum bag 07, and ensure it fits tightly against the sealing strip 06, ensuring no wrinkles or air leaks. Install the connectors at the preset spacing. After the connectors penetrate the vacuum bag 07, seal the connection with sealant. One connector is connected to the vacuum pump, and the other connector is connected to the dispensing tube 12. The basic spacing between the connectors is 300-350mm, corresponding to a potting width 20 of 100-150mm. For every 50mm increase in the potting width 20, the spacing between the connectors is shortened by 100mm; for every 50mm decrease in the potting width 20, the spacing between the connectors is increased by 100mm. The maximum spacing should not exceed 500mm. Too large a spacing will cause the vacuum pressure to decrease and the adhesive to fill insufficiently; too small a spacing will increase the complexity of the system.

[0059] S3, Injection process control

[0060] Start the vacuum pump. Due to the setting of stop 09, adjust the vacuum pressure to 70 kPa and maintain the pressure stable for 3 minutes.

[0061] Set the flow rate according to the thickness of the honeycomb 03: if the thickness of the honeycomb 03 is 30mm (in the range of 20-50mm), set the flow rate to 40cm / min; if the viscosity of the potting compound 14 is too high, heat it to 40℃ to reduce the viscosity and then maintain the flow rate of 40cm / min.

[0062] Segmented control of glue injection: In the initial injection stage, the flow rate is reduced by 35% (i.e., 14cm / min) for 5 minutes to avoid impacting air entrapment; during the filling process, the flow rate is maintained at a uniform speed of 40cm / min, and the flow front of the glue is monitored through a transparent vacuum bag 07 to ensure that it is in a straight state. If the flow rate in a certain area suddenly increases, the overall flow rate is immediately reduced by 50%; near the end, the flow rate is reduced to 30% of the normal value (i.e., 12cm / min).

[0063] Adhesive viscosity and temperature control: When the viscosity is too high, the flow rate needs to be reduced by 20%-30%, or heated to 35-45℃ to reduce the viscosity. If the viscosity is greater than the set threshold, the flow rate or temperature will increase significantly and the filling will fail.

[0064] Filling begins: The dispensing head 10 and vacuum head 13 are connected by the top flexible guide net 05. The vacuum pump is located above, and the vacuum bag 07 acts on the part to achieve pressure. The honeycomb 03 has a dense pore structure, and the honeycomb wall is pressed on the bottom peelable fabric 02. Under the negative pressure of the overall vacuum system, the bottom peelable fabric 02 will not move upward. Under the traction of vacuum suction, the potting compound 14 is guided to the dispensing head 10 through the dispensing tube 12 and injected. The potting compound 14 begins to flow under the guidance of the top flexible guide net 05. Combine the above parameters to confirm the dispensing rate. The initial dispensing speed should be low (reduced by 30%-40%) to avoid impact and air entrapment. If the initial flow rate is too fast, the potting compound will impact the guide net or the inner wall of the honeycomb, forming turbulent vortices and entraining air into the potting compound, forming bubbles. Low-speed propulsion allows the air to be discharged first under the action of vacuum, paving the way for the resin.

[0065] The filling process, such as Figure 6 As shown: Under the combined action of vacuum negative pressure and gravity, the potting compound 14 gradually fills the honeycomb cells. The bottom peelable fabric 02 laid at the bottom plays a key role, both preventing the adhesive from penetrating downwards and retaining the air-conducting function to ensure effective transmission of vacuum pressure. The direction of adhesive filling is towards the core cells 15 and towards the core cells 16. The filling process needs to be promoted at a uniform speed. The resin front can be monitored through a transparent vacuum bag. If the flow rate in a certain area suddenly increases (possibly due to uneven fiber layup), the overall flow rate needs to be reduced (40-60%) in time. The core principle is that the potting compound should maintain a "straight forward" state at the front (without local sudden increases or stagnation).

[0066] Cyclic Propulsion Process: Approaching the End: Slowing Down to Prevent "Vacuum Bubble Suction" If the flow rate is too fast at the end, the resin will rush towards the vacuum head 13 quickly. At this time, the vacuum suction near the vacuum head 13 may "stretch" or "adsorb" the tiny bubbles that have not been completely discharged in the resin onto the mold surface, forming surface bubbles. A low speed allows the residual air to be smoothly discharged from the exhaust port under the action of vacuum, reducing retention. Usually, the flow rate is reduced to 30% for the end.

[0067] like Figure 6 As shown, when a certain cell is filled, the internal pressure balance leads to a decrease in pressure difference and a weakening of the effect of gravity. At this time, under the continuous suction of the vacuum pump, the adhesive flows towards the vacuum source 17 in the area with lower pressure and fills the adjacent unsaturated cell 18.

[0068] S4, Cyclic Filling and Switching

[0069] like Figure 8 As shown, after the initial filling area 21 is completed, the positions of the dispensing nozzle and vacuum nozzle are switched to fill the adjacent areas to be filled 22, realizing multi-area cyclic filling. The switching interval must be strictly implemented according to the joint spacing, otherwise it will lead to overlapping or omission of filling between areas.

[0070] Repeat the dispensing process control steps of S3. The adhesive flows to the new area under vacuum suction, completing the "fill-flow-refill" cycle.

[0071] Switch all connectors sequentially as described above until all 03 cells of the honeycomb are completely filled. Turn off the vacuum pump and the dispensing valve, and maintain the vacuum state until the potting compound 14 is completely cured (curing time 24 hours).

[0072] After curing, remove the vacuum bag 07, sealing strip 06 and joint, peel off the top and bottom peelable cloth 02, clean the bottom air guide plate 01 (which can be reused), check that the potting area has no voids or delamination, and that the surface is flat and smooth, and the potting is complete.

[0073] Through the above implementation methods, the system achieves precise coupling between component size and process parameters, ensuring improved potting quality and efficiency. In practical applications, it is necessary to strictly monitor the parameter execution and fine-tune and optimize according to the characteristics of the cellular 03 structure.

[0074] The grid size 25, wall thickness 26, and exhaust hole size 23 of the bottom air guide plate 01 of this application directly determine the exhaust efficiency and support strength. Combined with a vacuum pressure of 60-80Kpa, it can quickly exhaust gas and avoid deformation of the honeycomb 03.

[0075] The mesh size 27, wire diameter 28, and laying direction of the top flexible guide net 05 are coordinated with the diameter and flow rate of the glue injection tube 12 to ensure that the glue is quickly and evenly wetted and to avoid uneven local filling.

[0076] The matching relationship between the joint spacing and the 20mm potting width, combined with the cyclic switching method, ensures full-area filling of large areas and complex structures, solving the problem of incomplete potting in traditional processes.

[0077] The graded and segmented control of flow rate, precisely matched with the thickness of honeycomb 03 and the viscosity of the adhesive, avoids defects such as air entrapment and bubble absorption from the source, ultimately achieving a dual improvement in potting quality and efficiency.

[0078] The above specific embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A honeycomb potting system, comprising a mold (08), characterized in that: A honeycomb (03) is provided above the mold (08). The honeycomb (03) is connected to a flow guiding mechanism and a number of blocks (09) for fixing the honeycomb (03). A vacuum bag (07) is provided above the honeycomb (03). A sealing strip (06) connected to the vacuum bag (07) is provided on the outside of the block (09) and around the honeycomb (03). A connector for connecting a vacuum pump or a glue injection mechanism is provided at intervals in the potting area on the honeycomb (03). The flow guiding mechanism includes a bottom peelable fabric (02) and a bottom air guide plate (01) arranged from top to bottom below the honeycomb (03). It also includes a top peelable fabric (04) and a top flexible flow guiding net (05) arranged from bottom to top above the honeycomb (03). The bottom air guide plate (01) has a grid size (25) that is 1 / 3 to 1 / 5 of the honeycomb (03) grid size, a wall thickness (26) that is 1 / 4 to 1 / 2 of the grid size (25), and a height tolerance of ±0.15mm for the product skin thickness. An exhaust hole (23) is provided on the side wall of the bottom air guide plate (01), and the diameter of the exhaust hole (23) is 1-2mm. The top flexible guide net (05) is made of polymer material, with a mesh size (27) of 0.5-5mm and a wire diameter (28) of 0.1-0.5mm. The guide net is placed radially (29) along the direction of liquid flow.

2. The honeycomb potting system according to claim 1, characterized in that: The glue injection mechanism includes a glue injection tube (12) connected to the connector, a glue container (11), and a potting compound (14).

3. The honeycomb potting system according to claim 1, characterized in that: The weight of the bottom peelable fabric (02) is 80-120 g / m², and the weight of the top peelable fabric (04) is 30-50 g / m².

4. The honeycomb potting system according to claim 1, characterized in that: The basic spacing of the joints is 300-350mm, corresponding to a potting width (20) of 100-150mm; for every 50mm increase in potting width (20), the spacing between the joints is shortened by 100mm; for every 50mm decrease in potting width (20), the spacing between the joints is increased by 100mm, with a maximum spacing not exceeding 500mm.

5. A honeycomb filling method, employing the honeycomb filling system according to any one of claims 1-4, characterized in that: Includes the following steps, S1. Component laying and positioning: The bottom air guide plate (01), bottom peelable fabric (02), honeycomb (03), top peelable fabric (04) and top flexible flow guide net (05) are laid sequentially on the mold (08). Blocks (09) are set around the honeycomb (03) for limiting support. S2. Vacuum system establishment: Place sealing strips (06) around the honeycomb (03), cover with vacuum bag (07) to form a closed vacuum space, and arrange joints according to the preset spacing; S3, Injection process control: Inject potting compound (14) through the connector, guide and control the flow of potting compound (14) under the action of vacuum pump, monitor the filling status of honeycomb (03) in real time, and adjust the injection parameters; S4. Cyclic filling and switching: After completing the local area filling, switch the injection tube (12) to the adjacent joint and repeat the cycle of filling-flowing-refilling until the overall potting is completed.

6. The honeycomb potting method according to claim 5, characterized in that: In S3, the flow of potting compound (14) is controlled in stages according to the height of the honeycomb (03): For honeycomb (03) with a thickness of less than 20 mm, the flow rate is 40-80 cm / min; Honeycomb (03) with a thickness between 20-50 mm, and a flow rate of 30-50 cm / min; Honeycomb (03) with a thickness between 50-80 mm, and a flow rate of 20-40 cm / min; For honeycomb (03) with a thickness greater than 80 mm, the flow rate is 10-30 cm / min.

7. The honeycomb filling method according to claim 6, characterized in that: In S3, the injection of potting compound (14) adopts a segmented control strategy: Reduce the flow rate by 30%-40% during the initial injection phase to avoid air entrapment. The filling process should proceed at a constant speed to ensure that the flow front is straight; Near the end, reduce the flow rate to 30% of the normal value to prevent vacuuming and bubble formation.

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