Foam honeycomb structure for electromagnetic shielding and method of manufacturing the same

Abstract

This invention belongs to the field of electromagnetic shielding equipment, specifically relating to a foam honeycomb structure for electromagnetic shielding and its manufacturing method. It addresses the problem that existing absorption panels have weak structural strength and air permeability, which can affect the normal operation of electrical equipment. The structure includes several electromagnetic shielding units arranged in an array, with adjacent units interconnected and symmetrically positioned. Each electromagnetic shielding unit has an octagonal outer contour. Each unit includes a fixing member and several connecting members surrounding the fixing member. The fixing member has a first absorption hole, and each connecting member has a second absorption hole. The first and second absorption holes are oriented in the same direction. This invention provides greater stability to the foam honeycomb structure, improves air permeability by providing first and second absorption holes, facilitates heat dissipation, and allows electromagnetic waves to be scattered multiple times within the first and second absorption holes, increasing energy loss and achieving a good shielding effect.

Description

Technical Field

[0001] This invention belongs to the field of electromagnetic shielding equipment, and more specifically, relates to a foam honeycomb structure for electromagnetic shielding and its manufacturing method. Background Technology

[0002] With the rapid development of the electronics and information industry, electronic and electrical equipment has been widely used in various industries. However, while providing great convenience to people's lives, it has also exposed serious electromagnetic pollution problems. Related studies have confirmed that electromagnetic waves emitted by electronic and electrical equipment can not only interfere with the normal operation of other instruments and equipment, but may also lead to information leakage and even endanger human health.

[0003] Traditional electromagnetic shielding often employs reflection loss, using reflectors to reflect electromagnetic waves emitted by electronic and electrical equipment. However, this method, relying on reflectors to propagate electromagnetic waves, can easily cause secondary pollution. Therefore, current electromagnetic shielding methods typically utilize absorber plates made of dense polymer materials doped with conductive particles, which can absorb electromagnetic waves emitted by electronic and electrical equipment.

[0004] The existing related technologies have the following problems: the absorption plate absorbs electromagnetic waves, but the absorption plate structure is weak and easily deformed, and its air permeability and heat dissipation performance is poor. The heat generated by electronic and electrical equipment cannot be dissipated quickly, which affects normal use. Summary of the Invention

[0005] In order to effectively absorb electromagnetic waves while improving structural strength and air permeability, this invention provides a foam honeycomb structure for electromagnetic shielding and its manufacturing method.

[0006] The present invention provides a foam honeycomb structure for electromagnetic shielding, which adopts the following technical solution:

[0007] A foam honeycomb structure for electromagnetic shielding includes several electromagnetic shielding units arranged in an array, with adjacent electromagnetic shielding units connected to each other and symmetrically arranged; the outer contour of each electromagnetic shielding unit is octagonal; each electromagnetic shielding unit includes a fixing member and several connecting members arranged around the periphery of the fixing member, the fixing member having a first absorption hole, and each of the connecting members having a second absorption hole, the first absorption hole and the second absorption hole having the same opening direction.

[0008] By adopting the above technical solution, the foam honeycomb structure is connected into a whole by several electromagnetic shielding units in a certain arrangement. The electromagnetic shielding units are connected by fixing parts and connectors to form an octagonal outer contour, specifically the orthographic projection shape of a fourteen-sided foam lattice structure. This increases the connection surface of the electromagnetic shielding units, making the foam honeycomb structure more stable. By setting the first absorption hole and the second absorption hole, the air permeability of the foam honeycomb structure is improved, which facilitates heat dissipation. Moreover, electromagnetic waves are scattered multiple times in the first absorption hole and the second absorption hole, which improves the energy loss of electromagnetic waves and achieves a good shielding effect.

[0009] As a further preferred embodiment, the fixing member is a regular square prism, the first absorption hole is located in the middle of the regular square prism, and the inner wall of the first absorption hole is parallel to the outer wall of the regular square prism; the connecting member is a hexagonal prism, the second absorption hole is located in the middle of the hexagonal prism, and the inner wall of the second absorption hole is parallel to the outer wall of the hexagonal prism.

[0010] By adopting the above technical solution, the hexagonal prism is set on the periphery of the square prism, and the connection is stable. The first absorption hole and the second absorption hole are set in shapes corresponding to the square prism and the hexagonal prism, which changes the uniform shape of the traditional honeycomb structure, enhances the absorption of electromagnetic waves, and further improves the shielding effect.

[0011] As a further preferred embodiment, four hexagonal prisms are provided, and the four hexagonal prisms are respectively disposed on the four outer walls of the regular square prism, with two adjacent hexagonal prisms connected to each other.

[0012] By adopting the above technical solution, the four hexagonal prisms and the central square prism are connected, and the adjacent hexagonal prisms are interconnected, forming a simple structure that makes the electromagnetic shielding unit more integrated and the structure more stable.

[0013] As a further preferred embodiment, the hexagonal prism includes a first connecting portion and two second connecting portions, the two second connecting portions being symmetrically arranged at both ends of the first connecting portion, and one side of the first connecting portion being connected to the regular square prism.

[0014] By adopting the above technical solution, the first connecting part is connected to the regular square prism, and two adjacent hexagonal prisms are connected by the second connecting part, making the connection more stable and further improving the structural stability of the electromagnetic shielding unit.

[0015] As a further preferred embodiment, the electromagnetic shielding unit further includes four truncated pyramids, the bottom surfaces of the four truncated pyramids are respectively connected to the side of the corresponding first connecting portion away from the regular square prism, the top surface of the truncated pyramids has the same shape and size as the inner wall of one side of the first absorption hole, and the distance from the bottom surface to the top surface of the truncated pyramids is the same as the thickness of the regular square prism.

[0016] By adopting the above technical solution, the truncated quadrangular body is connected to the side of the first connecting part that is away from the regular square prism. When multiple electromagnetic shielding unit arrays are set up, the holes formed by the truncated quadrangular bodies have the same shape as the aperture of the first absorption hole, thus ensuring the consistency of the overall structure.

[0017] As a further preferred embodiment, the first connecting portion includes two parallel first connecting plates, the shape and size of which are the same as the four sidewalls of the regular square prism; the second connecting portion includes two right-angled second connecting plates connected to each other, the length of which is 1 / 5 to 4 / 5 of the length of the first connecting plate, the thickness of which is the same as the thickness of the regular square prism, and the thickness of which is √2 times the thickness of the second connecting plate; the two first connecting plates are respectively connected to the corresponding second connecting plates.

[0018] By adopting the above technical solution, the first connecting plate and the second connecting plate are connected to form a hexagonal prism. By controlling the ratio between the first connecting plate and the second connecting plate, the overall integrity of the hexagonal prism and the regular square prism are better and the structure is more stable.

[0019] As a further preferred embodiment, the height of the electromagnetic shielding unit is L, and the value of L ranges from 1 / 10 to 1 / 4 of the wavelength of the electromagnetic wave being shielded; the width of the electromagnetic shielding unit is H, and the value of H ranges from 1 / 50 to 1 / 5 of the wavelength of the electromagnetic wave being shielded; the side length of the regular square prism is a, and the value of a ranges from 0.2 to 0.5L; the thickness of the regular square prism is t, and the value of t ranges from 0.1 to 0.3a.

[0020] By adopting the above technical solution, the size of the electromagnetic shielding unit is adjusted according to the wavelength of the electromagnetic wave being shielded, and the size of the square prism and hexagonal prism changes accordingly, making the structure of the electromagnetic shielding unit more stable and the corresponding electromagnetic wave shielding effect better.

[0021] The present invention provides a method for manufacturing a foam honeycomb structure, which adopts the following technical solution:

[0022] A method for manufacturing a foam honeycomb structure, used to process the aforementioned foam honeycomb structure for electromagnetic shielding, includes the following steps:

[0023] Step 1: Model building. Build a model of the foam honeycomb structure for electromagnetic shielding, and perform entity merging and slicing.

[0024] Step 2: Model printing. Using metal-based composite powder as raw material, the process parameters of the printing equipment, such as substrate temperature, laser power, scanning speed, powder layer thickness, and scanning method, are set to print the model layer by layer.

[0025] Step 3: Separation. By separating the sample and the substrate, the shaped part is obtained.

[0026] As a further preferred embodiment, in step two, the metal-based composite powder includes copper alloy and ceramic particles, wherein the copper alloy particles have a particle size of 15-53 μm and the ceramic particles have a particle size of 50-200 nm.

[0027] By adopting the above technical solution, the raw materials are copper alloy and ceramic particles, which can absorb electromagnetic waves. The foam honeycomb structure has higher strength and good impact resistance and load-bearing capacity. At the same time, by controlling the particle size of the raw materials, the processed products have better density, thereby improving the shielding effect against electromagnetic waves.

[0028] As a further preferred embodiment, in step two, the substrate temperature is set to 150–200°C, the laser power is set to 280–370W, the scanning speed is set to 300–600 mm / s, the powder layer thickness is 20–40 μm, and the scanning method is interlayer rotation of 0°, 67°, or 90°.

[0029] By adopting the above technical solution, the printing equipment parameters are adjusted to a suitable range before printing, thereby improving the quality of printed products.

[0030] In summary, the present invention has at least the following beneficial technical effects:

[0031] 1. The foam honeycomb structure is formed by connecting several electromagnetic shielding units in a certain arrangement. The outer contour of the electromagnetic shielding unit, which is formed by fasteners and connectors, is octagonal, which increases the connection surface of the electromagnetic shielding unit and makes the foam honeycomb structure more stable. At the same time, the first absorption hole and the second absorption hole are set to improve the air permeability of the foam honeycomb structure and facilitate heat dissipation. Furthermore, the electromagnetic waves are scattered multiple times in the first absorption hole and the second absorption hole, which improves the energy loss of the electromagnetic waves and achieves a good shielding effect.

[0032] 2. The size of the electromagnetic shielding unit is adjusted according to the wavelength of the electromagnetic wave being shielded. The size of the square prism and hexagonal prism changes accordingly, so that the structure of the electromagnetic shielding unit remains stable and the corresponding electromagnetic wave shielding effect is better.

[0033] 3. By using copper alloys and ceramic particles as raw materials, electromagnetic waves can be absorbed. The foam honeycomb structure has higher strength and good impact resistance and load-bearing capacity. At the same time, controlling the particle size of the raw materials makes the processed products have better density, thereby improving the shielding effect of electromagnetic waves. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the overall structure of the electromagnetic shielding unit according to an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the overall structure of the electromagnetic shielding unit entity combined according to an embodiment of the present invention;

[0037] Figure 4 These are simulation curves of the absorption rate, reflectivity, and transmittance of electromagnetic waves for foam honeycomb structures and traditional honeycomb structures in the 2-18GHz range.

[0038] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0039] 1. Electromagnetic shielding unit; 2. Regular square prism; 21. First absorption hole; 3. Hexagonal prism; 31. Second absorption hole; 32. First connecting part; 321. First connecting plate; 33. Second connecting part; 331. Second connecting plate; 4. Frustum. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0041] In the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] The following is in conjunction with the appendix Figure 1-4 The present invention will be described in further detail below.

[0045] This invention discloses a foam honeycomb structure for electromagnetic shielding.

[0046] Reference Figure 1-3 A foam honeycomb structure for electromagnetic shielding includes several electromagnetic shielding units 1 arranged in an array, with adjacent units 1 connected and symmetrically arranged. Each electromagnetic shielding unit 1 includes a fixing member and several connecting members arranged around the fixing member. The outer contour of each electromagnetic shielding unit 1 is octagonal, specifically the orthographic projection shape of a fourteen-sided foam lattice structure, thus combining a honeycomb structure and a foam lattice structure. By increasing the connecting surfaces of the electromagnetic shielding units 1, the foam honeycomb structure formed by connecting several electromagnetic shielding units 1 becomes more stable. To improve the air permeability of the foam honeycomb structure, a first absorption hole 21 is provided on the fixing member, and a second absorption hole 31 is provided on each connecting member. The first and second absorption holes 21 are opened in the same direction, which increases the heat dissipation performance of the equipment while shielding electromagnetic waves.

[0047] In this embodiment, the fixing member is a regular square prism 2. When the electromagnetic shielding units 1 are arranged in an array, the four edges of the regular square prism 2 point to the horizontal and vertical directions respectively. The first absorption hole 21 is located in the middle of the regular square prism 2. The inner wall of the first absorption hole 21 is parallel to the outer wall of the regular square prism 2. The height of the electromagnetic shielding unit 1 is denoted as L, and the value of L ranges from 1 / 10 to 1 / 4 of the wavelength of the shielded electromagnetic wave. The width of the electromagnetic shielding unit 1 is denoted as H, and the value of H ranges from 1 / 50 to 1 / 5 of the wavelength of the shielded electromagnetic wave. The side length of the regular square prism 2 is denoted as a, and the value of a ranges from 0.2 to 0.5L. The distance from the inner wall of the first absorption hole 21 to the outer wall of the regular square prism 2 parallel to it is denoted as t. The thickness of the regular square prism 2 is denoted as t, and the value of t ranges from 0.1 to 0.3a.

[0048] When electromagnetic waves are incident on the surface of the foam honeycomb structure, a small portion of the electromagnetic waves will be reflected by the solid edges of the foam honeycomb, while most of the electromagnetic waves will enter the interior of the first absorption hole 21 and the second absorption hole 31. After multiple scatterings, the electromagnetic energy will be consumed. By adjusting the size of the first absorption hole 21 and the second absorption hole 31 and the thickness of the edges, electromagnetic shielding requirements for different frequency bands can be met.

[0049] In this embodiment, the connector is a hexagonal prism 3, and four hexagonal prisms are provided. The four hexagonal prisms 3 are respectively fixedly connected to the four outer walls of the square prism 2, and two adjacent hexagonal prisms 3 are fixedly connected to each other. The second absorption hole 31 is located in the middle of the hexagonal prism 3, and the inner wall of the second absorption hole 31 is parallel to the outer wall of the hexagonal prism 3. The electromagnetic shielding unit 1 has a simple structure and a more stable structure.

[0050] Specifically, the hexagonal prism 3 includes a first connecting part 32 and two second connecting parts 33. The two second connecting parts 33 are symmetrically arranged at both ends of the first connecting part 32. One side of the first connecting part 32 is connected to the regular square prism 2. The electromagnetic shielding unit 1 also includes four square frustums 4. The bottom surfaces of the four square frustums 4 are respectively connected to the corresponding side of the first connecting part 32 away from the regular square prism 2. The top surface of the square frustum 4 has the same shape and size as the inner wall of one side of the first absorption hole 21. The distance from the bottom surface to the top surface of the square frustum 4 is the same as the thickness of the regular square prism 2. When multiple electromagnetic shielding units 1 are arranged in an array, the holes formed by the square frustums 4 have the same shape as the aperture of the first absorption hole 21, ensuring the consistency of the overall structure.

[0051] The first connecting part 32 includes two parallel first connecting plates 321 with a gap between them. The shape and size of the first connecting plates 321 are the same as the four side walls of the regular square prism 2. The second connecting part 33 includes two right-angled second connecting plates 331 connected to each other. The length of the second connecting plate 331 is 1 / 5 to 4 / 5 of the length of the first connecting plate 321. The thickness of the second connecting plate 331 is the same as the thickness of the regular square prism 2. The thickness of the first connecting plate 321 is √2 times the thickness of the second connecting plate 331. The two first connecting plates 321 are respectively connected to the corresponding second connecting plates 331.

[0052] The present invention also discloses a method for manufacturing a foam honeycomb structure.

[0053] A method for manufacturing a foam honeycomb structure, using 3D printing technology to process the aforementioned foam honeycomb structure for electromagnetic shielding, includes the following steps:

[0054] Step 1: Model building. Based on the requirements of shielding electromagnetic waves, use 3D modeling software such as SolidWorks and UG, or the modeling module built into the electromagnetic simulation software CST, to build a foam honeycomb structure model of appropriate size, and perform solid merging and slicing.

[0055] Step 2: Model printing. Metal-based composite powder is prepared by ball milling and mixing. Using the metal-based composite powder as raw material, the process parameters of the printing equipment are set, including substrate temperature, laser power, scanning speed, powder layer thickness, and scanning method. Laser selective melting technology is used to print the model layer by layer.

[0056] Step 3: Separation. By separating the sample and the substrate, the shaped part is obtained.

[0057] In step one, the constructed foam honeycomb structure model is imported into Materialise Magics software for entity merging, merging multiple electromagnetic shielding units 1 into an overall model. After merging, an STL file is generated, and then the STL file is imported into the printing equipment for slicing. Slicing involves cutting the overall model into thin slices of equal thickness in the horizontal direction to facilitate layer-by-layer processing by the printing equipment.

[0058] In a preferred embodiment, the metal-based composite powder comprises copper alloy and ceramic particles. The copper alloy particles have a particle size of 15-53 μm, and the ceramic particles have a particle size of 50-200 nm, preferably 100 nm. The copper alloy and ceramic particles are mixed uniformly through a ball milling process, resulting in a denser printed foam honeycomb structure, thereby improving the electromagnetic shielding effect. The copper alloy can also play a mechanical load-bearing role, making the foam honeycomb structure stronger and having good impact resistance and load-bearing capacity. The ceramic particles, as the second phase in the copper matrix, have a different dielectric constant from the copper matrix, and interfacial polarization is easily generated at the interface between the two, thereby losing electromagnetic wave energy.

[0059] In step two, a molding chamber is provided on the substrate, the substrate temperature is set to 150-200℃, the laser power is set to 280-370W, the scanning speed is set to 300-600mm / s, the powder layer thickness is 20-40μm, and the scanning method is interlayer rotation of 0°, 67° or 90°. Preferably, the scanning method is interlayer rotation of 67°.

[0060] For electromagnetic waves in the 2-18GHz band, the dielectric constant and permeability of the raw material were measured using a vector network analyzer. The parameters were then imported into the CST simulation software. The electromagnetic shielding unit 1 was drawn using the modeling module built into the CST simulation software, where L = 8mm, H = 3mm, a = 0.5L, and t = 0.2a. The model's STL file was exported and imported into the Materialise Magics software. A 3×3 array was formed in the xy direction. After that, all entities were merged, an STL file was generated, and the file was imported into the control software built into the laser selective melting equipment for slicing.

[0061] The laser selective melting process uses a single-material powder feeding method. The powder tank is filled with copper-based composite powder, of which ceramic particles account for 0.2 wt% and the remainder is copper. The substrate is preheated to 200℃, the powder layer thickness is 30μm, the laser power is 350W, the scanning speed is 550mm / s, and the scanning path is a 67° interlayer rotation.

[0062] After printing is complete, wait for the temperature to cool to room temperature, remove the formed parts and substrate, clean the excess powder in the forming chamber, and separate the parts and substrate using wire cutting technology.

[0063] The parts were immersed in anhydrous ethanol for ultrasonic cleaning to remove wire cutting oil and powder adhering to the surface.

[0064] Based on the simulation data, referring to Figure 4 Curve R represents reflectivity, curve A represents absorptivity, and curve T represents transmissivity. Based on the curves, it can be concluded that the electromagnetic transmittance of the foam honeycomb structure is lower than that of the traditional honeycomb structure. Furthermore, in the 5-17GHz range, the absorptivity of the foam honeycomb structure is higher and the reflectivity is lower, which is more conducive to efficient electromagnetic shielding.

[0065] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A foam honeycomb structure for electromagnetic shielding, characterized in that, It includes several electromagnetic shielding units (1), which are arranged in an array, and two adjacent electromagnetic shielding units (1) are connected to each other and symmetrically arranged. The outer contour of the electromagnetic shielding unit (1) is octagonal, and is also set as the orthographic projection shape of a tetrahedral foam lattice structure; the electromagnetic shielding unit (1) includes a fixing member and several connecting members arranged around the periphery of the fixing member. The fixing member is provided with a first absorption hole (21), and several connecting members are provided with a second absorption hole (31). The first absorption hole (21) and the second absorption hole (31) are opened in the same direction. The fastener is a regular square prism (2), the first absorption hole (21) is located in the middle of the regular square prism (2), and the inner wall of the first absorption hole (21) is parallel to the outer wall of the regular square prism (2); the connector is a hexagonal prism (3), the second absorption hole (31) is located in the middle of the hexagonal prism (3), and the inner wall of the second absorption hole (31) is parallel to the outer wall of the hexagonal prism (3); Four hexagonal prisms (3) are provided, and the four hexagonal prisms (3) are respectively provided on the four outer walls of the regular square prism (2), and two adjacent hexagonal prisms (3) are connected to each other; The hexagonal prism (3) includes a first connecting part (32) and two second connecting parts (33). The two second connecting parts (33) are symmetrically arranged at both ends of the first connecting part (32). One side of the first connecting part (32) is connected to the regular square prism (2). The electromagnetic shielding unit (1) further includes four truncated pyramids (4). The bottom surfaces of the four truncated pyramids (4) are respectively connected to the side of the corresponding first connecting part (32) away from the regular square prism (2). The top surface of the truncated pyramid (4) has the same shape and size as the inner wall of one side of the first absorption hole (21). The distance from the bottom surface to the top surface of the truncated pyramid (4) is the same as the thickness of the regular square prism (2).

2. The foam honeycomb structure for electromagnetic shielding according to claim 1, characterized in that, The first connecting part (32) includes two parallel first connecting plates (321), the shape and size of which are the same as the four side walls of the regular square prism (2); the second connecting part (33) includes two right-angled second connecting plates (331), the length of which is 1 / 5 to 4 / 5 of the length of which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is which is the same as the thickness of which is ... The two first connecting plates (321) are respectively connected to the corresponding second connecting plates (331).

3. The foam honeycomb structure for electromagnetic shielding according to claim 1, characterized in that, The height of the electromagnetic shielding unit (1) is L, and the value of L ranges from 1 / 10 to 1 / 4 of the wavelength of the electromagnetic wave being shielded; the width of the electromagnetic shielding unit (1) is H, and the value of H ranges from 1 / 50 to 1 / 5 of the wavelength of the electromagnetic wave being shielded; the side length of the regular square prism (2) is a, and the value of a ranges from 0.2 to 0.5L; the thickness of the regular square prism (2) is t, and the value of t ranges from 0.1 to 0.3a.

4. A method for manufacturing a foam honeycomb structure, used to process the foam honeycomb structure for electromagnetic shielding as described in any one of claims 1-3, characterized in that, Includes the following steps: Step 1: Model building. Build a model of the foam honeycomb structure for electromagnetic shielding, and perform entity merging and slicing. Step 2: Model printing. Using metal-based composite powder as raw material, the process parameters of the printing equipment, such as substrate temperature, laser power, scanning speed, powder layer thickness, and scanning method, are set to print the model layer by layer. Step 3: Separation. By separating the sample and the substrate, the shaped part is obtained.

5. The method for manufacturing a foam honeycomb structure according to claim 4, characterized in that, In step two, the metal-based composite powder includes copper alloy and ceramic particles, with the copper alloy particles having a particle size of 15-53 μm and the ceramic particles having a particle size of 50-200 nm.

6. The method for manufacturing a foam honeycomb structure according to claim 4, characterized in that, In step two, the substrate temperature is set to 150~200℃, the laser power is set to 280~370W, the scanning speed is set to 300~600mm / s, the powder layer thickness is 20~40μm, and the scanning method is interlayer rotation of 0°, 67° or 90°.

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