Lightweight high-temperature-resistant polyurethane composite board

Abstract

The invention discloses a light high-temperature-resistant polyurethane composite board, and relates to the technical field of polyurethane composite boards, the light high-temperature-resistant polyurethane composite board comprises an aluminum frame, clamping mechanisms are arranged on the two sides of the aluminum frame, a penetrating opening is formed in the middle of the aluminum frame, a plurality of layers of composite materials are arranged on the inner side of the penetrating opening, and a plurality of telescopic grooves are inwards formed in the outer wall of the aluminum frame at equal intervals; the two sides of the arc-shaped block outside the telescopic groove are fixedly connected with the aluminum frame; according to the polyurethane composite board, through mutual cooperation of the buffer layer, the honeycomb wave-absorbing layer and the flame-retardant layer, the use diversification of the polyurethane composite board is conveniently increased, the use efficiency of the polyurethane composite board is improved, and the function of multiple functions of the polyurethane composite board is achieved; according to the aluminum frame and the packing, the attaching tightness degree between the aluminum frame and the packing can be enhanced conveniently, the connecting stability between the aluminum frame and the packing is improved, then the function of avoiding the falling risk between the inner packing and the aluminum frame is achieved, and finally the problem that the falling risk between the inner packing and the aluminum frame is caused due to insufficient attaching time is solved.

Description

Technical Field

[0001] The invention relates to the technical field of polyurethane composite boards, and in particular to a lightweight and high-temperature resistant polyurethane composite board. Background Art

[0002] Polyurethane materials were first invented in the 1940s and were initially used in fields such as elastomers and coatings. In the late 1950s, researchers began to explore the application of polyurethane in composite materials, especially in fields requiring high performance such as aerospace and industrial packaging.

[0003] Researchers began to combine a variety of materials (such as glass fiber, carbon fiber, etc.) with polyurethane to develop lightweight and high-strength composite panels. With the increase in high temperature demand, high temperature resistant modification technology came into being. In recent years, with the application and development of nanotechnology, nanofillers (such as nanoclay, graphene) are added to polyurethane to further improve its mechanical properties and heat resistance. The composition structure of the lightweight and high temperature resistant polyurethane composite panel includes a polyurethane matrix, additives and fillers, etc.; However, during the use of the existing lightweight and high temperature resistant polyurethane composite panel, there is a risk of the internal filler and the aluminum frame falling off due to insufficient bonding time; for this reason, the present application designs a lightweight and high temperature resistant polyurethane composite panel to solve the above problem. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a lightweight and high temperature resistant polyurethane composite board.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a lightweight and high-temperature resistant polyurethane composite board material, comprising an aluminum frame, wherein clamping mechanisms are provided on both sides of the aluminum frame, and a through opening is opened in the middle of the aluminum frame, and a multilayer composite material is provided on the inner side of the through opening, and a plurality of expansion grooves are evenly spaced inwardly provided on the outer wall of the aluminum frame, and both sides of the arc-shaped blocks outside the expansion grooves are fixedly connected to the aluminum frame.

[0006] Preferably, both inner and outer ends of one side of the aluminum frame are fixedly connected with clamping plates, and the middle part of the other side of the aluminum frame is fixedly connected with a limiting plate.

[0007] Preferably, a clamping groove is provided between the clamping plates, and a limit block is provided in the middle between the clamping plates, the limit block is fixedly connected to one side of the aluminum frame, a limit groove is provided between the limit plates on the other side of the aluminum frame, and an arc-shaped clamping block is provided on one side of the upper end of the limit plate.

[0008] Preferably, the clamping mechanism comprises a positioning block, a telescopic spring and a positioning slot, the positioning slots are equidistantly arranged on both sides of the limiting plate, and telescopic springs are installed inside the positioning slots, and a positioning block is installed on the upper end of the telescopic spring.

[0009] Preferably, the first layer of the through opening on the inner side of the outer wall of the aluminum frame is a polyurethane coating, and the polyurethane coating is provided with a plurality of limiting grooves equidistantly toward the outer end, and the limiting grooves are tightly fitted with the arc block.

[0010] Preferably, a plurality of grooves are equidistantly formed on the inner side of the polyurethane coating, and adhesive strips are pasted in the grooves, wherein the adhesive strips are fixed between the polyurethane coating and the buffer layer.

[0011] Preferably, the buffer layer is vertically and equidistantly provided with a plurality of buffer cavities, and the buffer cavities all penetrate the buffer layer.

[0012] Preferably, a honeycomb absorbing layer is provided inside the buffer layer, the honeycomb absorbing layer is provided with a plurality of hexagonal honeycomb grooves equidistantly arranged in the horizontal direction, the hexagonal honeycomb grooves run through the honeycomb absorbing layer horizontally, and an absorbing sheet is tightly attached to the inside of the honeycomb absorbing layer.

[0013] Preferably, a flame retardant layer is bonded to the inner side of the absorbing plate, the inner side of the flame retardant layer is tightly bonded to the metal grid layer frame, the inner side of the metal grid layer frame is provided with a metal mesh, and the metal mesh is fixedly connected to the inner wall of the metal grid layer frame.

[0014] Preferably, a moisture-proof layer is provided on the inner side of the metal grid layer frame, the inner side of the moisture-proof layer is tightly fitted with the thermal insulation layer, the inner side of the thermal insulation layer and the inner side of the aluminum frame are both equidistantly provided with a plurality of rectangular grooves inward, and the thermal insulation layer is tightly fitted with the inner wall of the aluminum frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention facilitates increasing the diversification of the use of the polyurethane composite board through the cooperation of the buffer layer, the honeycomb absorbing layer and the flame retardant layer, improves the efficiency of the use of the polyurethane composite board, and thus realizes the multifunctional function of the polyurethane composite board. The arc-shaped block and the rectangular groove cooperate with each other to facilitate strengthening the tightness of the fit between the aluminum frame and the filler, improve the stability of the connection between the aluminum frame and the filler, and thus achieve the function of avoiding the risk of falling off between the internal filler and the aluminum frame, and finally solves the problem of the risk of falling off between the internal filler and the aluminum frame due to insufficient bonding time.

[0017] 2. The present invention cooperates with the telescopic spring and the positioning block to strengthen the firmness of the connection between the polyurethane composite panels, improves the convenience of connecting the polyurethane composite panels, and further realizes the convenience and temperature function of directly building and splicing the polyurethane composite panels. The metal grid layer and the metal mesh cooperate with each other to strengthen the overall structural strength of the polyurethane composite panels, improve the bending resistance of the overall structure of the polyurethane composite panels, and further realize the anti-bending function of the polyurethane composite panels, and finally solves the problem of falling off due to improper operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall three-dimensional structure of the other side of the present invention;

[0021] Figure 3 It is a schematic diagram of the overall three-dimensional structure of the present invention when viewed from above;

[0022] Figure 4 It is a schematic diagram of the overall three-dimensional structure of the inner composite material of the present invention;

[0023] Figure 5 It is a schematic diagram of the overall three-dimensional structure of the inner local composite material of the present invention;

[0024] Figure 6 It is a schematic diagram of the overall three-dimensional structure of the inner sound-absorbing material of the present invention;

[0025] Figure 7 It is a schematic diagram of the overall three-dimensional structure of the inner integral reinforcement mechanism of the present invention;

[0026] Figure 8 It is a schematic diagram of the side cross-sectional structure of the plate clamping mechanism of the present invention.

[0027] Serial numbers in the figure: 1. Aluminum frame; 2. Telescopic slot; 3. Snap-in plate; 4. Limiting plate; 5. Positioning block; 6. Limiting block; 7. Limiting slot; 9. Arc block; 10. Polyurethane coating; 11. Limiting groove; 12. Adhesive strip; 13. Buffer layer; 14. Buffer cavity; 15. Honeycomb absorbing layer; 16. Absorbing sheet; 17. Flame retardant layer; 18. Metal mesh layer; 19. Moisture-proof layer; 20. Insulation layer; 21. Hexagonal honeycomb slot; 22. Metal mesh; 23. Telescopic spring; 24. Positioning slot. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Example: See Figures 1 to 8In the present invention, a lightweight and high temperature resistant polyurethane composite sheet comprises an aluminum frame 1, a clamping mechanism is arranged on both sides of the aluminum frame 1, a through hole is opened in the middle of the aluminum frame 1, a multilayer composite material is arranged inside the through hole, a plurality of expansion slots 2 are evenly opened inwardly on the outer wall of the aluminum frame 1, both sides of the arc-shaped blocks 9 outside the expansion slots 2 are fixedly connected to the aluminum frame 1, and the internal filler is closely fitted to the inner wall of the aluminum frame 1 through the expansion slots 2 and the through hole; a clamping plate 3 is fixedly connected to both inner and outer ends of one side of the aluminum frame 1, and the aluminum frame 1 is also fixedly connected to the inner wall of the aluminum frame 1. A limiting plate 4 is fixedly connected to the middle of one side, and the polyurethane composite plates are connected to each other through the clamping plate 3 and the limiting plate 4; clamping grooves are provided between the clamping plates 3, and a limiting block 6 is provided in the middle between the clamping plates 3, the limiting block 6 is fixed to one side of the aluminum frame 1, and a limiting groove 7 is provided between the limiting plates 4 on the other side of the aluminum frame 1, and an arc-shaped clamping block is provided on one side of the upper end of the limiting plate 4, and the limiting block 6 and the limiting groove 7 are used to facilitate the stable clamping of the polyurethane composite plates to prevent the polyurethane composite plates from moving.

[0030] In the present invention, the clamping mechanism includes a positioning block 5, a telescopic spring 23 and a positioning groove 24. The positioning grooves 24 are equidistantly arranged on both sides of the limiting plate 4, and telescopic springs 23 are installed on the inner sides of the positioning grooves 24. The upper end of the telescopic spring 23 is provided with a positioning block 5. The telescopic spring 23 and the positioning block 5 are used to further strengthen the connection between the polyurethane composite panels. The first layer of the through-hole on the inner side of the outer wall of the aluminum frame 1 is a polyurethane coating 10. The polyurethane coating 10 is equidistantly provided with a plurality of limiting grooves 11 toward the outer end. The limiting grooves 11 are tightly fitted with the arc block 9. The limiting grooves 11 and the arc block 9 are used to prevent the filler from falling off from the aluminum frame.

[0031] In the present invention, a plurality of grooves are equidistantly provided on the inner side of the polyurethane coating 10, and adhesive strips 12 are pasted in the grooves. The adhesive strips 12 are fixed between the polyurethane coating 10 and the buffer layer 13. The adhesive strips 12 between the polyurethane coating 10 and the buffer layer 13 facilitate stable connection between fillers; a plurality of buffer cavities 14 are equidistantly provided on the buffer layer 13 vertically, and the buffer cavities 14 all penetrate the buffer layer 13. The buffer cavities 14 provided in the buffer layer 13 facilitate the two sides of the filler to be tightly fitted on the inner wall of the aluminum frame 1; a honeycomb absorbing layer 15 is provided on the inner side of the buffer layer 13, and a plurality of hexagonal honeycomb grooves 21 are equidistantly provided on the honeycomb absorbing layer 15 in the horizontal direction. The hexagonal honeycomb grooves 21 penetrate the honeycomb absorbing layer 15 horizontally, and an absorbing sheet 16 is tightly fitted on the inner side of the honeycomb absorbing layer 15. The honeycomb absorbing layer 15 cooperates with the hexagonal honeycomb grooves 21 to facilitate the polyurethane composite board to have a sound-absorbing function.

[0032] In the present invention, a flame retardant layer 17 is bonded to the inner side of the absorbing plate 16, and the inner side of the flame retardant layer 17 is tightly bonded to the metal mesh layer frame 18. A metal mesh 22 is provided on the inner side of the metal mesh layer frame 18, and the metal mesh 22 is fixedly connected to the inner wall of the metal mesh layer frame 18. The metal mesh layer frame 18 and the metal mesh 22 are used to enhance the material's anti-bending ability at high temperatures. A moisture-proof layer 19 is provided on the inner side of the metal mesh layer frame 18, and the inner side of the moisture-proof layer 19 is tightly bonded to the thermal insulation layer 20. A plurality of rectangular grooves are equidistantly provided inwardly on the inner side of the thermal insulation layer 20 and the inner side of the aluminum frame 1, and the thermal insulation layer 20 is tightly bonded to the inner wall of the aluminum frame 1. The moisture-proof layer 19 and the thermal insulation layer 20 are used to ensure the stability of the temperature inside the polyurethane composite board.

[0033] Working principle: In this embodiment, the present invention also proposes a method for using a lightweight, high-temperature resistant polyurethane composite sheet, comprising the following steps:

[0034] Step 1: First, the adhesive strip 12 in the groove on one side of the polyurethane coating 10 is used to tightly connect the polyurethane coating 10 and the buffer layer 13. Then, the buffer layer 13 and the buffer cavity 14 are used to make the buffer layer 13 expand at a high temperature and have a certain buffering capacity under pressure. Then, the honeycomb absorbing layer 15 is attached to one side of the buffer layer 13 by an adhesive.

[0035] Step 2: With the honeycomb absorbing layer 15 and the hexagonal honeycomb groove 21, the polyurethane composite sheet has a sound-absorbing function, and then the absorbing sheet 16 is used to further prevent sound interference, and then the flame retardant layer 17 is used to prevent the internal filler from spontaneous combustion, and then the metal mesh layer 18 and the metal mesh 22 are used to enhance the overall anti-bending ability of the polyurethane composite sheet;

[0036] Step three, secondly, through the moisture-proof layer 19 and the thermal insulation layer 20, it is convenient to waterproof and prevent temperature loss, and then through the through hole in the middle of the aluminum frame 1, it is convenient to place the polyurethane composite filler on the inside, and then through the rectangular groove and the limiting groove 11 and the arc block 9, the polyurethane composite filler is closely fitted to the inner wall of the aluminum frame 1;

[0037] Step four, finally, through the limit block 6 and the limit groove 7, it is convenient to connect and splice the polyurethane composite panels, and then through the clamping plate 3 and the limit plate 4, it is convenient to enhance the stability of the connection of the polyurethane composite panels, and then through the telescopic spring 23 and the positioning block 5 in the positioning groove 24, it is convenient to connect the polyurethane composite panels to the inner side of the clamping groove on the clamping plate 3 after the positioning block 5 is clamped, so as to further prevent the polyurethane composite panels from separating, and then through the telescopic groove 2, it is convenient to prevent the aluminum frame 1 from deformation under high temperature conditions.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lightweight, high temperature resistant polyurethane composite sheet, comprising an aluminum frame (1), characterized in that: The aluminum frame (1) is provided with a clamping mechanism on both sides, and a through opening is provided in the middle of the aluminum frame (1), and a multilayer composite material is provided inside the through opening. The outer wall of the aluminum frame (1) is provided with a plurality of expansion grooves (2) at equal intervals inwardly, and both sides of the arc-shaped blocks (9) outside the expansion grooves (2) are fixedly connected to the aluminum frame (1).

2. The lightweight, high temperature resistant polyurethane composite sheet according to claim 1, characterized in that: The inner and outer ends of one side of the aluminum frame (1) are both fixedly connected to a clamping plate (3), and the middle part of the other side of the aluminum frame (1) is fixedly connected to a limiting plate (4).

3. The lightweight, high temperature resistant polyurethane composite sheet according to claim 2, characterized in that: A clamping groove is provided between the clamping plates (3), and a limit block (6) is provided in the middle of the clamping plates (3); the limit block (6) is fixedly connected to one side of the aluminum frame (1); a limit groove (7) is provided between the limit plates (4) on the other side of the aluminum frame (1); and an arc-shaped clamping block is provided on one side of the upper end of the limit plate (4).

4. The lightweight and high temperature resistant polyurethane composite sheet according to claim 1, characterized in that: The clamping mechanism comprises a positioning block (5), a telescopic spring (23) and a positioning groove (24); the positioning grooves (24) are equidistantly arranged on both sides of the limiting plate (4); telescopic springs (23) are installed inside the positioning grooves (24); and the positioning block (5) is installed at the upper end of the telescopic spring (23).

5. The lightweight and high temperature resistant polyurethane composite sheet according to claim 1, characterized in that: The first layer of the through opening on the inner side of the outer wall of the aluminum frame (1) is a polyurethane coating (10), and the polyurethane coating (10) is provided with a plurality of limiting grooves (11) at equal intervals toward the outer end, and the limiting grooves (11) are tightly fitted with the arc block (9).

6. The lightweight and high temperature resistant polyurethane composite sheet according to claim 5, characterized in that: A plurality of grooves are equidistantly formed on the inner side of the polyurethane coating (10), and adhesive strips (12) are adhered in each of the grooves. The adhesive strips (12) are fixed between the polyurethane coating (10) and the buffer layer (13).

7. The lightweight and high temperature resistant polyurethane composite sheet according to claim 6, characterized in that: The buffer layer (13) is vertically and equidistantly provided with a plurality of buffer cavities (14), and the buffer cavities (14) all penetrate the buffer layer (13).

8. The lightweight and high temperature resistant polyurethane composite sheet according to claim 7, characterized in that: A honeycomb wave absorbing layer (15) is provided on the inner side of the buffer layer (13); a plurality of hexagonal honeycomb grooves (21) are provided on the honeycomb wave absorbing layer (15) at equal intervals in the horizontal direction; the hexagonal honeycomb grooves (21) pass through the honeycomb wave absorbing layer (15) horizontally; and a wave absorbing sheet (16) is tightly attached to the inner side of the honeycomb wave absorbing layer (15).

9. The lightweight and high temperature resistant polyurethane composite sheet according to claim 8, characterized in that: A flame retardant layer (17) is bonded to the inner side of the wave absorbing plate (16), the inner side of the flame retardant layer (17) is tightly bonded to the metal mesh layer frame (18), a metal mesh (22) is provided on the inner side of the metal mesh layer frame (18), and the metal mesh (22) and the inner wall of the metal mesh layer frame (18) are fixedly connected to each other.

10. The lightweight and high temperature resistant polyurethane composite sheet according to claim 9, characterized in that: A moisture-proof layer (19) is provided on the inner side of the metal mesh layer frame (18), the inner side of the moisture-proof layer (19) is in close contact with the thermal insulation layer (20), the inner side of the thermal insulation layer (20) and the inner side of the aluminum frame (1) are both provided with a plurality of rectangular grooves equidistantly inwardly, and the thermal insulation layer (20) is in close contact with the inner wall of the aluminum frame (1).

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