Honeycomb core of aluminum honeycomb panel and edge sealing process thereof

Abstract

The application discloses an aluminum honeycomb plate honeycomb core and an edge sealing process thereof, and belongs to the technical field of plate structures. In order to solve the problems of insufficient edge sealing strength and easy deformation of the honeycomb core, the aluminum honeycomb core process produced by using an epoxy resin type curing adhesive is simple, and energy consumption is low. The epoxy resin type adhesive has good aluminum material adhesion, high temperature resistance and small moisture influence, so that the overall strength and quality of the aluminum honeycomb plate can be effectively guaranteed. The edge of the aluminum honeycomb core is foamed and shaped by foaming glue, so that the strength of the edge of the aluminum honeycomb core can be effectively enhanced, and the problem that the edge is pressed and collapses can be avoided. After the foamed edge is cut, subsequent edge sealing process can be conveniently processed in place. The gap between the aluminum plate to be sealed and the sealing strip is bonded through the connecting end near the laser hot melting sealing strip, and the interfaces between the sealing strips on the aluminum honeycomb plate after edge sealing are also seamless and beautiful, and the connecting mechanism is more fastened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plate structure, and particularly relates to a honeycomb core of an aluminum honeycomb plate and an edge sealing process. BACKGROUND

[0002] The aluminum honeycomb plate is suitable for civil buildings, vehicle and ship decoration, etc. and is an application of aviation and space materials in the field of civil buildings. The whole processing process is completed in a modern factory, and a hot-press forming technology is adopted. Due to high heat conduction value between the aluminum skin and the honeycomb, the thermal expansion and cold shrinkage of the inner and outer aluminum skins are synchronous. Small holes are provided on the honeycomb aluminum skin, so that the gas in the plate can flow freely. The slidable installation buckle system will not cause structural deformation during thermal expansion and cold shrinkage.

[0003] The honeycomb core material in the aluminum honeycomb plate is a kind of low-density honeycomb material used as the core material of a sandwich structure. More than 500 different materials can be used for manufacturing. The main honeycomb core materials include aluminum alloy, glass fiber fabric impregnated with resin, aramid fiber paper, kraft paper, graphite fiber and Kevlar fiber, etc. The resin content is about 50%. The honeycomb holes have various different shapes, such as hexagonal, rectangular, reinforced shape, etc. The performance depends on the material, hole shape and size, etc. It is anisotropic, and the shear strength of the hexagonal honeycomb core material along the L direction is about twice that along the W direction. It is mainly used for aircraft radomes, antenna covers, aircraft floors, rudders, etc.

[0004] The existing aluminum honeycomb plate has the following problems in actual production and use:

[0005] When the aluminum honeycomb plate is edge sealed, the edge connection and coating are not comprehensive enough, the edge sealing effect is not good, the edge of the honeycomb core material is prone to deformation due to extrusion, thereby affecting the overall quality of the aluminum honeycomb plate, and after the edge sealing is completed, there is a gap at the connection, which is not beautiful. SUMMARY

[0006] The present application aims to provide a honeycomb core of an aluminum honeycomb plate and an edge sealing process thereof to solve the problems in the background.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a honeycomb core of an aluminum honeycomb plate, comprising an aluminum honeycomb core, a first outer aluminum plate is arranged on the top surface of the aluminum honeycomb core, a second outer aluminum plate is arranged on the bottom surface of the aluminum honeycomb core, an edge sealing strip is arranged on the outer side of the aluminum honeycomb core, the edge sealing strip is arranged around the aluminum honeycomb core, the first outer aluminum plate and the second outer aluminum plate, the first outer aluminum plate and the second outer aluminum plate are clamped in the inside of the edge sealing strip, the edge sealing strip is provided with four, a connecting end is arranged between every two adjacent edge sealing strips, a hot melt clamp strip is arranged on the inner side of the connecting end, and every two adjacent edge sealing strips are fixedly connected through the connecting end and the hot melt clamp strip.

[0008] Further, the inner side of the edge sealing strip is provided with an inner groove, the top edge of the first outer aluminum plate and the bottom edge of the second outer aluminum plate are provided with inclined surfaces, and the first outer aluminum plate and the second outer aluminum plate are clamped in the inner groove through the inclined surfaces.

[0009] Further, the aluminum honeycomb core, the first outer aluminum plate and the second outer aluminum plate are connected through the adhesive glue, and the inner groove of the edge sealing strip is connected with the edges of the aluminum honeycomb core, the first outer aluminum plate and the second outer aluminum plate through the adhesive glue.

[0010] Another technical problem to be solved by the present application is to provide an edge sealing process of a honeycomb core of an aluminum honeycomb plate.

[0011] Edge sealing preparation, selecting appropriate aluminum honeycomb core, first outer aluminum plate and second outer aluminum plate, cutting the aluminum honeycomb core, first outer aluminum plate and second outer aluminum plate to the required size, and checking the size and surface quality thereof;

[0012] Honeycomb core processing, padding a demolding pad layer in a forming mold, placing the cut aluminum honeycomb core into the forming mold, injecting edge sealing material to the edges of the aluminum honeycomb core, and waiting for the edge sealing material to solidify and shape, then taking out the aluminum honeycomb core after shaping and removing the demolding pad layer;

[0013] Foaming processing, applying foaming glue to the edge sealing material of the edges of the aluminum honeycomb core, padding a demolding pad layer in a forming mold, placing the aluminum honeycomb core with the applied foaming glue into the forming mold, vacuum bag pressing the forming mold and foaming and curing, taking out the aluminum honeycomb core with foamed edges and filled with edge sealing material after foaming and curing, and removing the demolding pad layer;

[0014] Edge processing, cutting and polishing the edges of the aluminum honeycomb core with foamed edges and filled with edge sealing material;

[0015] Edge sealing processing, sequentially and cumulatively connecting the first outer aluminum plate, the aluminum honeycomb core and the second outer aluminum plate through the adhesive glue to obtain a composite plate, brushing the adhesive glue at the edges of the composite plate, connecting the edge sealing strips at the edges of the composite plate and bonding through a wood edge sealing machine, filling the connecting ends between the edge sealing strips, laser hot melting the connecting ends and filling the gaps between the connecting positions of the edge sealing strips through hot melting clamping strips;

[0016] Cooling processing, taking out the aluminum honeycomb plate after the edge sealing processing is completed, and naturally cooling to room temperature in the air;

[0017] Quality detection, detecting the size and appearance quality of the aluminum honeycomb plate after edge sealing to ensure that it meets the use requirements.

[0018] Further, the unit product of the edge sealing material contains the following components: 120 parts by weight of epoxy resin, 25 parts by weight of curing agent, 5 parts by weight of diluent and 10 parts by weight of hollow glass microbeads.

[0019] The density of the edge sealing material is 0.25g / cm 3 -0.7g / cm 3 .

[0020] Further, during the foaming process, the environmental temperature during the foaming and curing process is maintained at 55-60 DEG C, and the foaming and curing is performed at the environmental temperature of 55-60 DEG C for 2-2.5 hours, and after the foaming and curing is completed, the aluminum honeycomb core is taken out after the environmental temperature is reduced to 25-30 DEG C.

[0021] Further, the aluminum honeycomb core with the foaming edges and filled with the edge sealing material is cut according to the product required size on the foaming edge area of the aluminum honeycomb core.

[0022] Further, the plate thickness of the edge sealing strip is 0.8-1.2mm, and the plate thickness of the first and second outer aluminum plates is 1.7-2mm.

[0023] Compared with the prior art, the present application has the following advantages:

[0024] 1. The aluminum honeycomb core produced by the polyurethane and epoxy resin reaction type curing adhesive has simple process, low energy consumption, good adhesion, high temperature resistance, small moisture influence, low bonding strength, good weather resistance, small peel strength reduction after use, high overall strength and quality of the aluminum honeycomb plate, continuous production, high efficiency, and short-term large batch supply requirement.

[0025] 2. The foaming glue is shaped and foamed at the edge of the aluminum honeycomb core, which can effectively enhance the strength of the edge of the aluminum honeycomb core, avoid the problem of edge collapse under extrusion, improve the product quality, and facilitate the subsequent bonding of the edge sealing strip, the first and second outer aluminum plates after cutting the foaming edge, improve the product processing convenience, and ensure the processing of the edge sealing process.

[0026] 3. The connecting end and the hot melt clamping strip are bonded at the joint of the edge sealing strip, and the connecting end and the hot melt clamping strip are melted after the connecting end is heated by laser, so that the gap between the edge sealing strip and the aluminum plate to be sealed is bonded, and the interface between the two edge sealing strips on the aluminum honeycomb plate is also seamless and beautiful, and the connecting mechanism is more firm.

[0027] 4. The inner side of the edge strip of the application is provided with an inner groove, the top edge of the first outer aluminum plate and the edge of the bottom surface of the second outer aluminum plate are provided with inclined surfaces, and the first outer aluminum plate and the second outer aluminum plate are clamped in the inner groove through the inclined surfaces, so that the edge strip can more comprehensively cover the aluminum honeycomb core, the first outer aluminum plate and the second outer aluminum plate, the structure connection is more compact after the edge is sealed, and the structural strength is high. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a schematic diagram of the aluminum honeycomb core structure of the application.

[0029] Figure 2 It is a schematic diagram of the aluminum honeycomb plate structure of the application.

[0030] Figure 3 It is a schematic diagram of the aluminum honeycomb plate exploded structure of the application.

[0031] Figure 4 It is a schematic diagram of the edge strip connection structure of the application.

[0032] Figure 5 It is a schematic diagram of the forming state of the forming die of the application.

[0033] Figure 6 It is a schematic diagram of the edge sealing process of the application.

[0034] In the figure: 1, aluminum honeycomb core; 2, first outer aluminum plate; 3, edge strip; 4, connecting end; 5, second outer aluminum plate; 6, inclined surface; 7, inner groove; 8, hot melt clamping strip; 9, forming die; 10, demolding pad layer; 11, edge sealing material. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0036] In order to solve the technical problems that the edge sealing of the aluminum honeycomb plate is not comprehensive, the edge sealing effect is poor, the edge of the honeycomb core material is prone to deformation due to extrusion, thereby affecting the overall quality of the aluminum honeycomb plate, and there is a gap at the connection after the edge sealing is completed, which is not beautiful, please refer to Figures 1-6 The application provides the following technical solutions:

[0037] The application relates to a honeycomb core of an aluminum honeycomb panel, which comprises an aluminum honeycomb core 1, a first outer aluminum plate 2 arranged on the top surface of the aluminum honeycomb core 1, a second outer aluminum plate 5 arranged on the bottom surface of the aluminum honeycomb core 1, and edge sealing strips 3 arranged on the outer sides of the aluminum honeycomb core 1, the first outer aluminum plate 2 and the second outer aluminum plate 5, wherein the edge sealing strips 3 are arranged around the aluminum honeycomb core 1, the first outer aluminum plate 2 and the second outer aluminum plate 5, the first outer aluminum plate 2 and the second outer aluminum plate 5 are clamped in the interiors of the edge sealing strips 3, the edge sealing strips 3 are provided with four, connecting ends 4 are arranged between every two adjacent edge sealing strips 3, hot melt clamping strips 8 are arranged on the inner sides of the connecting ends 4, and the every two adjacent edge sealing strips 3 are fixedly connected through the connecting ends 4 and the hot melt clamping strips 8.

[0038] Specifically, the first outer aluminum plate 2 and the second outer aluminum plate 5 are non-combustible materials, and the safety performance is stronger; the surfaces of the first outer aluminum plate 2 and the second outer aluminum plate 5 on the outer side of the aluminum honeycomb panel are treated by epoxy fluorocarbon, and the surfaces have strong corrosion resistance, no pinholes, cracks or bubbles are generated under salt spray, the aluminum honeycomb panel is a pure aluminum product, does not volatilize any harmful gas to the human body, has no radioactivity and can be completely recycled, is a 100% environmentally-friendly product, the aluminum honeycomb panel is easy to disassemble and assemble, and the panel cannot be damaged during disassembly.

[0039] The inner sides of the edge sealing strips 3 are provided with inner grooves 7, the top surface edges of the first outer aluminum plate 2 and the bottom surface edges of the second outer aluminum plate 5 are provided with inclined surfaces 6, and the first outer aluminum plate 2 and the second outer aluminum plate 5 are clamped in the interiors of the inner grooves 7. The aluminum honeycomb core 1, the first outer aluminum plate 2 and the second outer aluminum plate 5 are adhesively connected, and the inner grooves 7 of the edge sealing strips 3 and the edges of the aluminum honeycomb core 1, the first outer aluminum plate 2 and the second outer aluminum plate 5 are adhesively connected.

[0040] Specifically, the arrangement of the inner grooves 7 makes the edge sealing strips 3 more comprehensively cover the aluminum honeycomb core 1, the first outer aluminum plate 2 and the second outer aluminum plate 5, the structure connection is more compact after edge sealing, and the structural strength is high.

[0041] In order to better show the honeycomb core of the aluminum honeycomb panel, the application provides an edge sealing process of the honeycomb core of the aluminum honeycomb panel, which comprises the following steps:

[0042] Edge sealing preparation, selecting appropriate aluminum honeycomb core 1, first outer aluminum plate 2 and second outer aluminum plate 5, cutting the aluminum honeycomb core 1, the first outer aluminum plate 2 and the second outer aluminum plate 5 to the required size, and checking the size and surface quality of the aluminum honeycomb core 1, the first outer aluminum plate 2 and the second outer aluminum plate 5;

[0043] The honeycomb core processing, the release pad layer 10 is padded in the forming mold 9, the cut finished aluminum honeycomb core 1 is put into the forming mold 9, the edge injection sealing material 11 is injected to the edge of the aluminum honeycomb core 1, and the sealing material 11 is waited to be condensed and shaped. After shaping, the aluminum honeycomb core 1 is taken out and the release pad layer 10 is removed. The unit product of the sealing material 11 contains the following components: 120 parts by weight of epoxy resin, 25 parts by weight of curing agent, 5 parts by weight of diluent and 10 parts by weight of hollow glass microbeads. The particle size of the hollow glass microbeads is 20-150 μm, and the density of the sealing material 11 is 0.25 g / cm 3 -0.7 g / cm 3 ;

[0044] The foaming processing, the foaming glue is applied to the sealing material 11 of the edge of the aluminum honeycomb core 1, the release pad layer 10 is padded in the forming mold 9, the aluminum honeycomb core 1 to which the foaming glue is applied is put into the forming mold 9, the forming mold 9 is vacuum bag pressed and foaming curing is carried out. After the foaming curing is completed, the aluminum honeycomb core 1 with foaming edges and filled with the sealing material 11 is taken out, and the release pad layer 10 is removed. During the foaming processing, the environmental temperature is kept at 55-60 ℃ during the foaming curing, and the foaming curing is carried out under the environmental temperature of 55-60 ℃ for 2-2.5 hours. After the foaming curing is completed, the aluminum honeycomb core 1 is taken out after the environmental temperature is reduced to 25-30 ℃;

[0045] The edge processing, the edge of the aluminum honeycomb core 1 with foaming edges and filled with the sealing material 11 is cut and polished. When cutting, the cutting is carried out on the foaming edge area of the aluminum honeycomb core 1 according to the required size of the product;

[0046] The sealing processing, the first outer aluminum plate 2, the aluminum honeycomb core 1 and the second outer aluminum plate 5 are sequentially and cumulatively adhered by the adhesive glue and a composite plate is obtained. The adhesive glue is brushed at the edge of the composite plate, the sealing strip 3 is adhered to the edge of the composite plate and is adhered by the wood sealing machine. The connecting end 4 is filled between the sealing strips 3, the connecting end 4 is laser hot-melt connected and the gap at the connection of each sealing strip 3 is filled by the hot-melt clamping strip 8. The plate thickness of the sealing strip 3 is 0.8-1.2 mm, and the plate thickness of the first outer aluminum plate 2 and the second outer aluminum plate 5 is 1.7-2 mm;

[0047] The cooling processing, after the sealing processing is completed, the aluminum honeycomb plate is taken out and is naturally cooled to room temperature in the air;

[0048] The quality detection, the size and appearance quality of the aluminum honeycomb plate after sealing are detected to ensure that it meets the use requirements.

[0049] Specifically, in the process of processing the honeycomb core, the aluminum honeycomb core 1 produced by using polyurethane and epoxy resin reaction type curing adhesive has simple process, low energy consumption, good adhesion of the epoxy resin adhesive to aluminum material, high temperature resistance, small moisture influence, and low bonding strength of the aluminum honeycomb core 1 filled by the edge of the edge sealing material 11. The 180° peeling strength of the aluminum honeycomb panel with a honeycomb core edge length of 4 mm, a panel thickness of 1 mm, and a total thickness of 10 mm is about 4 N / mm, and the adhesion performance and weather resistance are good, the peeling strength decreases very little after one year of use, so that the overall strength and quality of the aluminum honeycomb panel can be effectively guaranteed, and continuous production is facilitated, the efficiency is high, and the short-term large-batch supply requirement can be met.

[0050] Specifically, in the process of foaming, the foaming glue is shaped and foamed at the edge of the aluminum honeycomb core 1, so that the strength of the edge of the aluminum honeycomb core 1 can be effectively enhanced, the problem of edge collapse under extrusion can be avoided, the product quality can be improved, and after the foamed edge is cut after edge treatment, the subsequent adhesion of the edge sealing strip 3, the first outer aluminum plate 2 and the second outer aluminum plate 5 can be facilitated, the product processing convenience can be improved, and the edge sealing process can be guaranteed to be in place.

[0051] Specifically, in the process of edge sealing, the connecting end 4 and the hot melt clamping strip 8 are used to bond the joint of the edge sealing strip 3, and the connecting end 4 near the edge sealing strip 3 is bonded by laser hot melting, so that the aluminum of the connecting end 4 and the hot melt clamping strip 8 is melted to bond the gap between the aluminum plate to be sealed and the edge sealing strip, and the interface between the edge sealing strips 3 on the aluminum honeycomb panel after edge sealing is also seamless and beautiful, and the connecting mechanism is more firm.

[0052] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An edge sealing process for a honeycomb core of an aluminum honeycomb panel, the aluminum honeycomb panel comprising an aluminum honeycomb core (1), a first outer aluminum panel (2) arranged on a top surface of the aluminum honeycomb core (1), a second outer aluminum panel (5) arranged on a bottom surface of the aluminum honeycomb core (1), and an edge sealing strip (3) arranged on an outer side of the aluminum honeycomb core (1), the edge sealing strip (3) surrounding the aluminum honeycomb core (1), the first outer aluminum panel (2), and the second outer aluminum panel (5), the first outer aluminum panel (2) and the second outer aluminum panel (5) being clamped inside the edge sealing strip (3), the edge sealing strip (3) being provided in four, and a connecting end (4) being arranged between every two adjacent edge sealing strips (3), a hot melt clamp strip (8) being arranged on an inner side of the connecting end (4), and every two adjacent edge sealing strips (3) being fixedly connected through the connecting end (4) and the hot melt clamp strip (8), characterized in that, The edge sealing process of the honeycomb core of the aluminum honeycomb panel comprises the following steps: Edge sealing preparation, selecting suitable aluminum honeycomb core (1), first outer aluminum plate (2) and second outer aluminum plate (5), cutting the aluminum honeycomb core (1), first outer aluminum plate (2) and second outer aluminum plate (5) to the required size, checking the size and surface quality thereof; Honeycomb core processing, placing a release pad (10) in a forming mold (9), placing the cut aluminum honeycomb core (1) into the forming mold (9), injecting edge sealing material (11) at the edge of the aluminum honeycomb core (1), and waiting for the edge sealing material (11) to solidify and set; after setting, the aluminum honeycomb core (1) is taken out and the release pad (10) is removed; Foaming processing, applying foaming glue to the edge sealing material (11) of the aluminum honeycomb core (1), placing a release pad (10) in a forming mold (9), placing the aluminum honeycomb core (1) with foaming glue applied into the forming mold (9), vacuum bag pressing the forming mold (9) and foaming and curing, taking out the aluminum honeycomb core (1) with foaming edges and filled with edge sealing material (11) after foaming and curing, and removing the release pad (10); Edge processing, cutting and polishing the edges of the aluminum honeycomb core (1) with foaming edges and filled with edge sealing material (11); Edge sealing processing, sequentially and cumulatively bonding the first outer aluminum plate (2), the aluminum honeycomb core (1) and the second outer aluminum plate (5) by means of adhesive glue to obtain a composite panel, brushing adhesive glue at the edges of the composite panel, bonding the edge sealing strips (3) at the edges of the composite panel and bonding by means of a wood edge sealing machine, filling the connecting ends (4) between the edge sealing strips (3), laser hot melting the connecting ends (4) and filling the gaps at the connecting positions of the edge sealing strips (3) by means of hot melting clamping strips (8); Cooling processing, after the edge sealing processing is completed, the aluminum honeycomb panel is taken out and naturally cooled to room temperature in the air; Quality detection, size and appearance quality detection of the aluminum honeycomb panel after edge sealing to ensure that it meets the use requirements; The unit product of the edge sealing material (11) comprises the following components: 120 parts by weight of epoxy resin, 25 parts by weight of curing agent, 5 parts by weight of diluent and 10 parts by weight of hollow glass microbeads; The density of the edge sealing material (11) is 0.25 g / cm 3 -0.7 g / cm 3 ; In the edge processing, the aluminum honeycomb core (1) with foaming edges and filled with edge sealing material (11) is cut according to the required size of the product on the foaming edge area of the aluminum honeycomb core (1); The inner side of the edge sealing strip (3) is provided with an inner groove (7), the top edge of the first outer aluminum plate (2) and the edge of the bottom surface of the second outer aluminum plate (5) are provided with inclined surfaces (6), and the first outer aluminum plate (2) and the second outer aluminum plate (5) are clamped in the inner groove (7) through the inclined surfaces (6).

2. An edge sealing process for a honeycomb core of an aluminum honeycomb panel as defined in claim 1, wherein: The aluminum honeycomb core (1), the first outer aluminum plate (2) and the second outer aluminum plate (5) are bonded by means of adhesive glue, and the inner groove (7) of the edge sealing strip (3) and the edges of the aluminum honeycomb core (1), the first outer aluminum plate (2) and the second outer aluminum plate (5) are bonded by means of adhesive glue.

3. An edge sealing process for a honeycomb core of an aluminum honeycomb panel as defined in claim 1, wherein, During the foaming treatment, the environmental temperature is kept at 55-60 DEG C during the foaming curing process, and the foaming curing is performed at the environmental temperature of 55-60 DEG C for 2-2.5 hours, and after the foaming curing is completed, the aluminum honeycomb core (1) is taken out after the environmental temperature is reduced to 25-30 DEG C.

4. An edge sealing process for a honeycomb core of an aluminum honeycomb panel as defined in claim 1 wherein: The plate thickness of the edge sealing strip (3) is 0.8-1.2 mm, and the plate thickness of the first outer aluminum plate (2) and the second outer aluminum plate (5) is 1.7-2 mm.

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