High-heat-preservation wave-absorbing plate and production method thereof

Abstract

The invention relates to a high-heat-preservation wave-absorbing plate and a production method thereof, and belongs to the technical field of square cabins, and the high-heat-preservation wave-absorbing plate is used for manufacturing cabin plates of the square cabins. The high-heat-preservation wave-absorbing plate comprises an outer skin, an inner skin and a honeycomb wave-absorbing heat-preservation layer, the honeycomb wave-absorbing heat-preservation layer comprises a honeycomb wave-absorbing base plate and heat-preservation foaming filler, the honeycomb wave-absorbing base plate is of a plate-shaped honeycomb structure, each honeycomb inner cavity of the honeycomb wave-absorbing base plate is filled with the heat-preservation foaming filler, one end of the honeycomb wave-absorbing base plate is fixed to the outer skin in an adhesive mode, and the other end of the honeycomb wave-absorbing base plate is fixed to the inner skin in an adhesive mode. And the other end is glued and fixed with the inner skin. When the high-heat-preservation wave-absorbing plate of the structure is used as a square cabin plate, on the premise that the internal space of a square cabin is not reduced, the requirements for heat preservation, bearing and radar stealth of the square cabin can be met at the same time.

Description

Technical Field

[0001] This invention relates to the field of modular hospital technology, specifically to a high-insulation wave-absorbing panel and its manufacturing method. Background Technology

[0002] To prevent targets from being detected by radar and to improve their survivability and camouflage in the operating environment, stealth technology, as an important scientific technology for defense systems, is receiving increasing attention. Researchers have developed various stealth technologies and materials accordingly. Existing technologies for radar stealth of aircraft and ground equipment mainly include stealth shape design and radar-absorbing coatings for aircraft, and camouflage nets, honeycomb radar-absorbing panels, radar-absorbing foam panels, and radar-absorbing coatings for ground equipment.

[0003] The radar stealth capabilities of ground-based shelters also fall into the above categories. However, all of these methods have shortcomings. For example, the thermal insulation of honeycomb absorbing panels is insufficient to meet the usage requirements of shelters, while absorbing foam panels, although meeting the thermal insulation requirements, have poor load-bearing capacity. To ensure that both thermal insulation and load-bearing capacity meet the requirements, a thermal insulation layer can be laminated onto the honeycomb absorbing panel, or a high-strength load-bearing layer can be laminated onto the absorbing foam. However, both of these solutions would lead to an increase in the thickness of the absorbing panel layer, which would encroach on the usable space of the shelter.

[0004] Therefore, there is a need to provide a high-insulation microwave absorbing panel to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved: To overcome the shortcomings of existing technologies, this invention provides a high-insulation radar-absorbing panel and its manufacturing method. By designing a honeycomb radar-absorbing substrate, insulating foam filler is filled into each honeycomb cell of the substrate, and inner and outer skins are respectively provided on both sides of the substrate to form the high-insulation radar-absorbing panel. When used as a modular shelter panel, this high-insulation radar-absorbing panel can simultaneously meet the insulation, load-bearing capacity, and radar stealth requirements of the shelter without reducing its internal space, thus solving existing problems.

[0006] The technical solution of the present invention is: a high-insulation and heat-absorbing panel, comprising an outer skin, an inner skin, and a honeycomb heat-absorbing layer; The honeycomb absorbing heat insulation layer includes a honeycomb absorbing substrate and heat insulation foam filler. The honeycomb absorbing substrate has a plate-shaped honeycomb structure and is coated with an absorbent for absorbing electromagnetic waves. Each honeycomb cavity of the honeycomb absorbing substrate is filled with heat insulation foam filler for heat insulation. The honeycomb absorbing substrate is sandwiched between the outer skin and the inner skin. One end of the honeycomb absorbing substrate is glued to the outer skin and the other end is glued to the inner skin.

[0007] A further technical solution of the present invention is: the honeycomb absorbing substrate includes multiple honeycomb units, each honeycomb unit is a polyprismatic hollow cylinder structure, multiple honeycomb units are arrayed in the same plane, the outer prism outer walls of adjacent honeycomb units are fixedly connected, the hollow cylinder inner cavity of each honeycomb unit forms a honeycomb inner cavity, and multiple honeycomb units as a whole form a plate-shaped honeycomb structure.

[0008] A further technical solution of the present invention is that the outer skin material is transparent glass or polyurethane fiberboard.

[0009] A further technical solution of the present invention is that the inner skin material is an aluminum plate or a steel plate.

[0010] A further technical solution of the present invention is that the thermal insulation foam filler is a two-component polyurethane foam material or an infrared stealth material.

[0011] A further technical solution of the present invention is that the adsorbent for absorbing microwaves is nano-γ-(Fe,Ni) alloy powder.

[0012] A method for producing the high-insulation microwave absorbing panel includes: The outer skin, honeycomb absorbing substrate, and inner skin are cut into the required shapes according to specific design dimensions; Based on the volume of a single cell cavity on the cellular absorbing substrate, calculate the amount of each component of the two-component foaming material that needs to be filled in a single cell cavity. Use a double-tube pipette to pick up the two-component foaming material accordingly, and drop it into one cell cavity of the cellular absorbing substrate according to the calculated amount of each component. Fill all the cells cavity in sequence. Apply adhesive evenly to the bonding surfaces of the outer skin and the inner skin, and then bond and fix the bonding surfaces of the outer skin, the honeycomb absorbing substrate filled with foam material, and the bonding surfaces of the inner skin in sequence to obtain a composite board. The composite board is placed on a press and pressed to cure and form a high-insulation wave-absorbing board.

[0013] A further technical solution of the present invention is: the calculation method for the amount of each component of the two-component foaming material to be filled in a single honeycomb cavity is as follows:

[0014]

[0015] In the formula, This represents the bottom area of ​​a single cell cavity on the cellular absorbing substrate. The height of the honeycomb cavity. The coefficient of thermal expansion of the two-component foam material. This refers to the mixing ratio coefficient of the two-component foaming material. This refers to the amount of one component used in a two-component foam material. This refers to the amount of the other component used in a two-component foam material.

[0016] A further technical solution of the present invention is: during the pressure curing molding process, the pressing temperature is room temperature, the pressure of the press is 2MPa, and the pressing time is 30 minutes.

[0017] An application of the aforementioned high-insulation and wave-absorbing panel is used to manufacture the cabin panels of a container house.

[0018] The beneficial effects of this invention are as follows: The high-insulation microwave absorbing panel of this invention, through the design of a honeycomb structure substrate and the coating of a microwave absorbing agent on the substrate, achieves functional microwave absorption not only through the honeycomb structure but also through the microwave absorbing agent. Each cell of the honeycomb substrate is filled with insulating foam filler, which provides insulation. The honeycomb substrate, together with the insulating foam filler, forms the middle honeycomb microwave absorbing insulation layer, which is fixed to both sides of the honeycomb microwave absorbing insulation layer by outer and inner skins, forming structural support. Simultaneously, the outer skin, made of transparent glass or polyurethane fiberboard, achieves wave transmission, enabling the middle honeycomb microwave absorbing insulation layer to absorb waves efficiently. The inner skin, made of aluminum or steel plate, reflects waves, reflecting any electromagnetic waves not fully absorbed by the middle honeycomb microwave absorbing insulation layer back to the middle layer for further absorption, thereby improving the absorption rate and preventing electromagnetic waves from penetrating the high-insulation microwave absorbing panel.

[0019] This invention precisely calculates the amount of two-component foaming material in each honeycomb cavity, ensuring the high consistency of the thermal insulation foaming filler. It can accurately control the height difference between the thermal insulation foaming filler and the honeycomb absorbing substrate, leaving space for overflow when bonding with the outer and inner skins on both sides, thus ensuring a firm bond with the skins on both sides.

[0020] When the high-insulation absorbing panel of this invention is used in the cabin panel of a container, i.e. the large panel of the container, the honeycomb structure of the honeycomb absorbing substrate can meet the load-bearing requirements of the container. The filling of the heat-insulating foam filler plays a heat-insulating role, realizing the dual functions of wave absorption and heat insulation. While achieving heat insulation and radar stealth, since the heat-insulating foam filler is filled inside the honeycomb, it does not increase the thickness of the cabin panel, effectively increasing the internal space of the container with the same external container size.

[0021] The two-component thermal insulation foam material in this invention can be replaced with an infrared stealth material, thereby achieving infrared and radar compatible stealth. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a heat-insulating and wave-absorbing plate structure according to the present invention (adhesive layer not shown). Figure 2 This is a schematic cross-sectional view of a heat-insulating and wave-absorbing plate according to the present invention.

[0024] In the diagram: 1. Outer skin, 2. Thermal insulation foam filler, 3. Honeycomb absorbing substrate, 4. Inner skin, 5. Adhesive layer. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1 This embodiment provides a high-insulation microwave absorbing panel, such as... Figure 1 As shown, the high-insulation microwave absorbing panel includes an outer skin 1, an inner skin 4, and a honeycomb microwave absorbing insulation layer. The honeycomb microwave absorbing insulation layer is sandwiched between the outer skin 1 and the inner skin 4 and is fixedly connected to the skins on both sides.

[0027] The honeycomb absorbing insulation layer includes a honeycomb absorbing substrate 3 as a supporting structure and an insulating foam filler 2 as a filler. The honeycomb absorbing substrate 3 has a plate-like honeycomb structure and is coated with an absorbent. Based on its honeycomb structure and absorbent, the honeycomb absorbing substrate 3 achieves a dual absorption effect: structural absorption by the honeycomb structure and functional absorption by the absorbent, thus efficiently absorbing electromagnetic waves. In this embodiment, the absorbent is nano-γ-(Fe,Ni) alloy powder, uniformly coated on the surface of the honeycomb absorbing substrate 3. Simultaneously, the honeycomb structure ensures the load-bearing capacity requirements of the high-insulation absorbing panel.

[0028] Specifically, the honeycomb absorbing substrate includes multiple honeycomb units, each of which is a polygonal prism-shaped hollow cylindrical structure. In this embodiment, the honeycomb unit is adopted. Figure 1The hexagonal hollow cylindrical structure shown has multiple honeycomb units arrayed in the same plane. The outer walls of the prisms of adjacent honeycomb units are fixedly connected. The hollow inner cavity of each honeycomb unit forms a honeycomb inner cavity. The multiple honeycomb units as a whole form a honeycomb absorbing substrate 3 with a plate-like honeycomb structure.

[0029] Each honeycomb cavity of the honeycomb absorbing substrate 3 is filled with thermal insulation foam filler for heat preservation, giving the high-insulation absorbing panel its heat preservation function. The thermal insulation foam filler 2 is a two-component polyurethane foam material or an infrared stealth material. In this embodiment, the two-component polyurethane foam material includes two components, one of which is a polyether composite and the other is an isocyanate. When used, the ratio of polyether composite and isocyanate is 1:1.1. In other embodiments, the two-component polyurethane foam material can be replaced with an infrared stealth material, so that the high-insulation absorbing panel has both heat preservation and infrared / radar stealth functions.

[0030] The honeycomb absorbing substrate 3 is sandwiched between the outer skin 1 and the inner skin 4. Its hexagonal prism axis is perpendicular to both sides of the skin. One end of the honeycomb absorbing substrate 3 is glued to the outer skin 1, and the other end is glued to the inner skin 4. The outer skin 1 and the inner skin 4 are arranged parallel to each other. Figure 2 As shown, an adhesive layer 5 is formed at the bonding points of the honeycomb absorbing substrate 3 and the skin on both sides. The adhesive used in this embodiment is a commercially available adhesive, which is composed of thermosetting resin and curing agent. The honeycomb absorbing substrate 3 is made of 20mm thick absorbing foam board.

[0031] The outer skin 1 is made of glass or polyurethane fiberboard, which allows electromagnetic waves to pass through and enter the middle honeycomb absorbing insulation layer. The inner skin 4 is made of 0.8-2mm thick aluminum or steel plate, which reflects electromagnetic waves. When electromagnetic waves that are not fully absorbed by the middle honeycomb absorbing insulation layer come into contact with the inner skin, they will be reflected back to the middle honeycomb absorbing insulation layer for re-absorption, thereby improving the absorption rate and preventing electromagnetic waves from penetrating the high-insulation absorbing plate. In this embodiment, the inner skin 4 is made of 0.8mm thick aluminum plate; the outer skin 1 is made of 1mm thick glass fiberboard.

[0032] This high-insulation, radar-absorbing panel is used as the main panel in the modular shelter, enabling it to possess radar stealth capabilities while also meeting the load-bearing and insulation requirements. Furthermore, because the insulating foam filler is integrated into the honeycomb cavity, it does not occupy additional thickness space of the panel, effectively increasing the internal space of the shelter within the same external dimensions.

[0033] Example 2: This embodiment provides a method for producing the high-insulation microwave absorbing panel described in Embodiment 1, the method comprising the following steps: Step 1. Cut the outer skin 1, the honeycomb absorbing substrate 3, and the inner skin 4 into the required shapes according to the specific design dimensions.

[0034] Step 2. Based on the volume of a single cell cavity on the cellular absorbing substrate 3, calculate the amount of each component of the two-component foaming material that needs to be filled in a single cell cavity. The two-component foaming material includes component a and component b. During the calculation, the amount of component a and component b needs to be calculated separately.

[0035] The calculation method for the amount of each component of the two-component foam material required to fill a single honeycomb cavity is as follows:

[0036]

[0037] In the formula, This represents the bottom area of ​​a single cell cavity on the cellular absorbing substrate. The height of the honeycomb cavity. The coefficient of thermal expansion of the two-component foam material. This refers to the mixing ratio coefficient of the two-component foaming material. The amount of component A in a two-component foam material. This refers to the amount of component b in a two-component foam material.

[0038] Step 3. Use a dual-tube pipette to aspirate the two-component foaming material. One tube of the pipette aspirates component A, and the other tube aspirates component B. The calculated amounts of each component are then dripped into the same cell cavity of the honeycomb absorbing substrate 3. After one cell cavity is filled, the process continues until all cells are filled. The dual-tube pipette has an automatic drip control function, allowing simultaneous filling of both component A and component B into a single cell cavity according to the calculated amounts. Using a dual-tube pipette avoids the need for pre-mixing the two-component foaming material. Furthermore, it allows for the aspiration of a sufficient amount of the corresponding component foaming material at once, with the dripping controlled according to the calculated amount, until the foaming material in the pipette tube is used up, at which point it is aspirated again.

[0039] Step 4. Apply adhesive evenly to the bonding surfaces of the outer skin 1 and the inner skin 4 (i.e., the side of the outer skin facing the honeycomb absorbing substrate 3 and the side of the inner skin facing the honeycomb absorbing substrate 3). Then, bond and fix the bonding surfaces of the outer skin 1, the honeycomb absorbing substrate 3 filled with foam material, and the inner skin 4 in sequence. Pay attention to the alignment of each side during bonding. After bonding, a composite board is obtained.

[0040] Step 5. Place the bonded composite board on a press and apply pressure to cure it. The pressing temperature is room temperature, the press pressure is 2 MPa, and the pressing time is 30 minutes. Remove the cured composite board from the press to obtain a high-insulation microwave absorbing board.

[0041] When the specific design dimensions of the outer skin, honeycomb absorbing substrate 3 and inner skin 4 in step 1 are the dimensions of the cabin panel, the final cabin panel used for the cabin is obtained.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-insulation microwave absorbing panel, characterized in that, Includes outer skin, inner skin, and honeycomb wave-absorbing insulation layer; The honeycomb absorbing heat insulation layer includes a honeycomb absorbing substrate and heat insulation foam filler. The honeycomb absorbing substrate has a plate-shaped honeycomb structure and is coated with an absorbent for absorbing electromagnetic waves. Each honeycomb cavity of the honeycomb absorbing substrate is filled with heat insulation foam filler for heat insulation. The honeycomb absorbing substrate is sandwiched between the outer skin and the inner skin. One end of the honeycomb absorbing substrate is glued to the outer skin and the other end is glued to the inner skin.

2. The high-insulation microwave absorbing plate according to claim 1, characterized in that, The honeycomb absorbing substrate includes multiple honeycomb units, each of which is a multi-prism hollow cylindrical structure. Multiple honeycomb units are arrayed in the same plane, and the outer prism outer walls of adjacent honeycomb units are fixedly connected. The hollow inner cavity of each honeycomb unit forms a honeycomb inner cavity, and multiple honeycomb units as a whole form a plate-like honeycomb structure.

3. The high-insulation microwave absorbing plate according to claim 1, characterized in that, The outer skin material is transparent glass or polyurethane fiberboard.

4. The high-insulation microwave absorbing plate according to claim 1, characterized in that, The inner skin material is aluminum plate or steel plate.

5. The high-insulation microwave absorbing plate according to claim 1, characterized in that, The thermal insulation foam filler is a two-component polyurethane foam material or an infrared stealth material.

6. The high-insulation microwave absorbing plate according to claim 1, characterized in that, The absorber used for absorbing microwaves is nano-γ-(Fe,Ni) alloy powder.

7. A method for producing a high-insulation microwave absorbing panel according to any one of claims 1-6, characterized in that the method... include: The outer skin, honeycomb absorbing substrate, and inner skin are cut into the required shapes according to specific design dimensions; Based on the volume of a single cell cavity on the cellular absorbing substrate, calculate the amount of each component of the two-component foaming material that needs to be filled in a single cell cavity. Use a double-tube pipette to pick up the two-component foaming material accordingly, and drop it into one cell cavity of the cellular absorbing substrate according to the calculated amount of each component. Fill all the cells cavity in sequence. Apply adhesive evenly to the bonding surfaces of the outer skin and the inner skin, and then bond and fix the bonding surfaces of the outer skin, the honeycomb absorbing substrate filled with foam material, and the bonding surfaces of the inner skin in sequence to obtain a composite board. The composite board is placed on a press and pressed to cure and form a high-insulation wave-absorbing board.

8. The method according to claim 7, characterized in that, The calculation method for the amount of each component of the two-component foam material required to fill a single honeycomb cavity is as follows: In the formula, This represents the bottom area of ​​a single cell cavity on the cellular absorbing substrate. The height of the honeycomb cavity. The coefficient of thermal expansion of the two-component foam material. This refers to the mixing ratio coefficient of the two-component foaming material. This refers to the amount of one component used in a two-component foam material. This refers to the amount of the other component used in a two-component foam material.

9. The method according to claim 7, characterized in that, During the pressure curing and molding process, the pressing temperature is room temperature, the pressure of the press is 2MPa, and the pressing time is 30 minutes.

10. An application of the high-insulation microwave absorbing panel according to any one of claims 1-6, characterized in that, The panels used to make the modular shelter.

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