Foamed aluminum counter-hood

Abstract

This invention provides a foamed aluminum acoustic reflector, comprising an acoustic reflector panel and a lightweight filling core. The acoustic reflector panel includes a front panel, a rear panel, a left panel, and a right panel made of metal, and a filling cavity formed by the front panel, rear panel, left panel, and right panel, with a width of 5mm to 20mm. The lightweight filling core is disposed within the filling cavity. Both the acoustic reflector panel and the foamed aluminum panel have an arc-shaped structure. The beneficial effects of this invention are that it cleverly uses a foamed aluminum panel to replace the aluminum honeycomb core sandwich panel, improving the various performance indicators of the acoustic reflector. It has high strength, is lightweight, and is easy to assemble, disassemble, or transport; it has high damping and shock absorption performance and impact energy absorption rate, providing good impact resistance; it has good reversibility, can be bent by molding, is easy to process, and has a simple manufacturing process; it is flexible in installation, quick in construction, healthy and environmentally friendly, reusable, pollution-free, insect-proof, fireproof, and will not warp or deform, making it sturdy and durable.

Description

Technical Field

[0001] This invention relates to the field of building technology, and in particular to a soundproof enclosure for preventing noise pollution. Background Technology

[0002] Sound reflectors are widely used in large music performance stages such as conference rooms, concert halls, and opera houses to improve viewing experience and sound propagation efficiency. Sound reflectors are typically composed of multiple moisture-resistant and flame-retardant panel units, enveloping the entire stage to create a good sound reflection effect. The most crucial component of a sound reflector is the reflector panel itself, fixed to the reflector structure. Existing sound reflector panels are usually made of aluminum or wood, which can easily lead to metallic vibrations during use, negatively impacting the performance. Furthermore, due to their structural limitations, existing sound reflector panels have several shortcomings, such as being too heavy, lacking structural strength, and having inadequate moisture resistance and flame retardancy. This results in various inconveniences during use. The excessive weight limits the size of the panel unit modules, leading to a larger number of modules needing to be assembled for the same area, increasing labor intensity and reducing work efficiency. Furthermore, the weight of the panel unit modules increases material consumption, hindering material conservation and environmental protection. Insufficient structural strength makes the panel unit modules prone to deformation under pressure during disassembly, assembly, and packaging, affecting sound transmission and compromising quality maintenance.

[0003] To address the aforementioned issues, a Chinese utility model patent, filed on November 27, 2017, with application number CN201721605309.9 and authorization announcement number CN207794344U, entitled "A Sound-Reflecting Cover Panel," discloses a sound-reflecting cover panel comprising: an aluminum honeycomb core sandwich panel with a predetermined curvature; flame-retardant plates respectively disposed on the inner and outer surfaces of the aluminum honeycomb core sandwich panel; a molded anti-scratch film disposed on the surface of the flame-retardant plate on the outwardly protruding side; and mounting grooves disposed on both sides of the aluminum honeycomb core sandwich panel for fixing and installing the sound-reflecting cover panel. The use of an aluminum honeycomb core panel inside the sound-reflecting cover panel significantly reduces the overall weight, eliminates the problem of metallic vibration, lowers production costs, and facilitates installation and production.

[0004] However, while the aforementioned utility model patent improves various properties through aluminum honeycomb core sandwich panels, it also has some drawbacks. For example, the aluminum honeycomb core sandwich panels are filled with through holes, resulting in a very small composite area with the flame-retardant board. The flame-retardant board and the aluminum honeycomb core sandwich panels are prone to detachment, leading to a high rework rate during processing. Because the through holes are arranged in a honeycomb pattern, their plasticity is very poor, making it difficult to process curved panels. The elastic recovery force is insufficient, and the soundproof cover panel is prone to collapse and deformation when subjected to strong impacts from heavy objects, making it difficult to recover. Summary of the Invention

[0005] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a foam aluminum acoustic shield that is lightweight, easier to manufacture and process, has better plasticity, and has high support strength.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0007] A foamed aluminum acoustic reflector includes an acoustic reflector panel and a lightweight filling core. The acoustic reflector panel comprises a front panel, a rear panel, a left panel, and a right panel made of metal material, and a filling cavity formed by the front panel, the rear panel, the left panel, and the right panel, the width of which is 5mm to 20mm. The lightweight filling core is disposed within the filling cavity.

[0008] Preferably, the lightweight filling core is a foamed aluminum board made by adding additives to pure aluminum or aluminum alloy and then performing a foaming process. The foamed aluminum board is integrated with the front cover, rear cover, left cover and right cover.

[0009] Preferably, the outer surface of the foamed aluminum board has an uneven surface, and the outer surface of the foamed aluminum board is provided with an adhesive layer for the composite front cover, rear cover, left cover and right cover. The inner walls of the front cover, rear cover, left cover and right cover have a rough surface to increase the composite area.

[0010] Preferably, the panel is provided with a plurality of sound-absorbing holes communicating with the aluminum foam board. The sound-absorbing holes are inclined and arranged in a row and column matrix structure with the inner side higher than the outer side. The diameter of the sound-absorbing holes is 1mm to 2mm. The sound-absorbing holes on the rear cover are used for sound absorption to prevent external environmental interference.

[0011] Preferably, both the acoustic reflector and the aluminum foam plate have an arc-shaped structure.

[0012] Preferably, the sound-reflecting cover is provided with a fixing post for fixing the sound-reflecting cover, and the corner of the front cover is provided with a beveled bracket. Several fixing plates are provided at the corner of the beveled bracket. The fixing plates are fixed to the fixing post by screws or rivets. Adjacent foam aluminum sound-reflecting covers are connected into one piece on the fixing post by beveled brackets.

[0013] Preferably, the fixing column has a hollow cavity inside, and foamed aluminum strips are laminated inside the cavity to increase the strength of the fixing column. The foamed aluminum strips increase the strength of the fixing column, which can reduce the thickness of the fixing column wall, reduce the cross-sectional area of ​​the fixing, and reduce its interference with sound propagation.

[0014] Preferably, the thickness of the front cover and the rear cover is 1mm to 5mm.

[0015] Preferably, the surface of the front or rear acoustic reflector is further provided with a decorative layer, which is a wood grain transfer layer, a solid wood veneer layer, a decorative film layer, a fireproof board layer, or a melamine layer.

[0016] In addition, this invention uses aluminum foam board as an intermediate material, cleverly applying it in the field of acoustics. The aluminum foam board is made by adding additives to pure aluminum or aluminum alloys and then performing a foaming process. It combines the characteristics of both metal and air bubbles, exhibiting low density, high impact absorption capacity, high temperature resistance, and good thermal insulation performance, thereby improving overall structural strength. Aluminum foam possesses excellent physical, chemical, and mechanical properties, as well as recyclability. Due to its low thermal conductivity, it is lightweight, high rigidity, and non-combustible, making it suitable for use as thermal insulation, heat preservation, and cold insulation materials. It features high damping and shock absorption performance, high impact energy absorption rate, non-combustibility, good heat resistance, and ease of processing. Its density is 0.1 to 0.4 times that of metallic aluminum, its flexural stiffness is 1.5 times that of steel, and its damping performance is 5 to 10 times that of metallic aluminum. When aluminum foam with a porosity of 84% undergoes 50% deformation, it can absorb 2.5 MJ / cm³ of shock. 3 It has the above energy, good corrosion resistance and weather resistance, low moisture absorption, no aging, non-toxicity, easy cutting, drilling and gluing, can be bent into the required shape by molding, and can be surface treated with organic or inorganic paint.

[0017] Compared with the prior art, the beneficial effects of the present invention are: (1) The composite aluminum foam board inside the sound-reflecting cover fully utilizes the rigidity of the front and rear sound-reflecting covers, and cleverly utilizes the low density, high impact absorption capacity, high temperature resistance, and good thermal insulation properties of the aluminum foam board. The aluminum foam board is cleverly used to replace the aluminum honeycomb core sandwich panel, which improves the various performance indicators of the sound-reflecting cover. This makes the aluminum foam sound-reflecting cover of the present invention have high strength, light weight per unit volume, thinner sound-reflecting cover thickness, and less metal material used. For example, the thickness of the front and rear sound-reflecting covers is only 1mm to 5mm, the structure is light and thin, and it can float. (1) It is easy to install, disassemble or transport on the water surface; (2) Since the surface of the foam aluminum board is a "foam-like" structure, it naturally has a rough surface that increases the composite area. The composite area with the sound-reflecting cover is more than twice the area of ​​its surface projection. The structure is tight and they will not fall off; (3) It has high damping and shock absorption performance and impact energy absorption rate. When the sound-reflecting cover is subjected to strong impact from heavy objects, the chance of collapse and deformation is greatly reduced; (4) It is non-combustible and has good heat resistance. It is also flexible and easy to process after molding. It is easy to cut and install. It is also easy to mold into the required arc-shaped structure without deformation or rebound. The manufacturing process is simple. In addition, this sound-reflecting cover also has the characteristics of flexible installation, quick construction, health and environmental protection, and reusability. The foam aluminum board and the sound-reflecting cover are both made of metal materials. They do not need to be soaked in insect-proofing water. They will not produce harmful gases when heated, pollute the indoor air, have good insect-proofing effect, good fireproofing effect, good reversibility, and will not produce warping or other deformations. It is sturdy and durable. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and are used together with the embodiments of the invention to explain the invention. They do not constitute a limitation of the invention. In the drawings:

[0019] Figure 1 This is a schematic diagram of the cross-sectional structure of the aluminum foam acoustic shield of the present invention;

[0020] Figure 2 This is a schematic diagram of the installation of the foamed aluminum acoustic shield of the present invention;

[0021] Figure 3 yes Figure 2 Top view;

[0022] In the diagram: 0-Front acoustic reflector, 1-Front acoustic reflector, 2-Rear acoustic reflector, 3-Left reflector, 4-Right reflector, 5-Filling cavity, 6-Aluminum foam board, 7-Adhesive layer, 8-Silicone hole, 9-Fixing post, 10-Angle bracket, 11-Fixing plate, 12-Aluminum foam strip. Detailed Implementation

[0023] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0024] like Figures 1 to 3 As shown, a preferred embodiment of the present invention provides a foamed aluminum acoustic reflector, comprising an acoustic reflector panel and a lightweight filling core. The acoustic reflector panel comprises a front panel, a rear panel, a left panel, and a right panel made of metal material, and a filling cavity formed by the front panel, the rear panel, the left panel, and the right panel, the width of which is 5mm to 20mm; the lightweight filling core is disposed within the filling cavity.

[0025] Preferably, the lightweight filling core is a foamed aluminum board made by adding additives to pure aluminum or aluminum alloy and then performing a foaming process. The foamed aluminum board is integrated with the front cover, rear cover, left cover and right cover.

[0026] Preferably, the outer surface of the foamed aluminum board has an uneven surface, and the outer surface of the foamed aluminum board is provided with an adhesive layer for the composite front cover, rear cover, left cover and right cover. The inner walls of the front cover, rear cover, left cover and right cover have a rough surface to increase the composite area.

[0027] To prevent interference from the external environment, preferably, the rear cover is provided with a number of sound-absorbing holes communicating with the foam aluminum plate. The sound-absorbing holes are inclined and arranged in a row and column matrix structure with the inner part higher than the outer part. The diameter of the sound-absorbing holes is 1mm~2mm.

[0028] To improve sound reflection, preferably, both the sound-reflecting cover and the aluminum foam board have an arc-shaped structure.

[0029] like Figures 2 to 3 As shown, in order to facilitate the installation and fixing of the sound-reflecting cover, preferably, the sound-reflecting cover is provided with a fixing post for fixing the sound-reflecting cover, and the corner of the front cover is provided with a beveled bracket. Several fixing plates are provided at the corner of the beveled bracket. The fixing plates are fixed to the fixing post by screws or rivets. Adjacent foam aluminum sound-reflecting covers are connected into one piece on the fixing post by beveled brackets.

[0030] like Figure 3 As shown, in order to increase the strength of the fixed column, reduce the thickness of the fixed column wall, reduce the cross-section of the fixed column, and reduce its interference with sound propagation, preferably, the fixed column has a hollow column cavity inside, and the column cavity is filled with foam aluminum strips to increase the strength of the fixed column.

[0031] Preferably, the thickness of the front cover and the rear cover is 1mm to 5mm.

[0032] To improve decorative performance, preferably, the surface of the front or rear acoustic reflector is further provided with a decorative layer, which is a wood grain transfer layer, a solid wood veneer layer, a decorative film layer, a fireproof board layer, or a melamine layer.

[0033] For installation reference, cut the appropriate size of the foam aluminum acoustic reflector according to actual needs. First, fix the fixing posts as required, and then fix each piece of foam aluminum acoustic reflector to the fixing posts according to the specified position and orientation. This is one preferred installation method; other installation methods can also be used, with appropriate modifications based on the actual situation. The entire installation is simple, convenient, and easy to operate. The installed acoustic reflector panels have advantages such as good sound transmission efficiency, high strength, beautiful appearance, good insect and pest resistance, and good fire resistance. In large music performance stages such as conference rooms, concert halls, or opera houses, it can improve the viewing effect, increase sound transmission efficiency, and provide people with a more comfortable experience.

[0034] In the above description, the metal materials used to manufacture the front and rear acoustic reflectors can be steel, aluminum alloys, or other metals. For aspects conventionally used in existing technology, such as structure and processes, details will not be elaborated further to save space. Undisclosed processing techniques and parts can be handled using conventional techniques found in existing technologies.

[0035] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, 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 foamed aluminum acoustic reflector, comprising an acoustic reflector panel and a lightweight filling core, characterized in that, The sound-absorbing cover includes a front cover, a rear cover, a left cover, and a right cover made of metal materials, and a filling cavity formed by the front cover, rear cover, left cover, and right cover, with a width of 5mm to 20mm. A lightweight filling core is disposed within the filling cavity. The lightweight filling core is a foamed aluminum board made by adding additives to pure aluminum or aluminum alloy and then performing a foaming process. The foamed aluminum board is integrated with the front cover, rear cover, left cover, and right cover. The outer surface of the foamed aluminum board has an uneven surface, and an adhesive layer for bonding the front cover, rear cover, left cover, and right cover is provided on the outer surface of each foamed aluminum board. The inner walls of the front cover, rear cover, left cover, and right cover all have rough surfaces to increase the composite area. The rear cover has several sound-absorbing holes communicating with the foamed aluminum board. The sound-absorbing holes are inclined and arranged in a row-column matrix structure with an inner higher than outer lower orientation. The diameter of the sound-absorbing holes is 1mm to 2mm.

2. The foamed aluminum acoustic reflector according to claim 1, characterized in that, Both the acoustic reflector and the aluminum foam board have an arc-shaped structure.

3. A foamed aluminum acoustic reflector according to any one of claims 1 to 2, characterized in that, The sound-reflecting cover is provided with a fixing post for fixing the sound-reflecting cover. The corner of the front cover is provided with a beveled bracket. Several fixing plates are provided at the corner of the beveled bracket. The fixing plates are fixed to the fixing post by screws or rivets. Adjacent foam aluminum sound-reflecting covers are connected to the fixing post as a whole by beveled brackets.

4. The foamed aluminum acoustic reflector according to claim 3, characterized in that, The fixing column has a hollow column cavity inside, and foam aluminum strips are laminated inside the column cavity to increase the strength of the fixing column.

5. The foamed aluminum acoustic reflector according to claim 4, characterized in that, The thickness of the front cover and the rear cover is 1mm to 5mm.

6. The foamed aluminum acoustic reflector according to claim 5, characterized in that, The surface of the front or rear cover is further provided with a decorative layer, which may be a wood grain transfer layer, a solid wood veneer layer, a decorative film layer, a fireproof board layer, or a melamine layer.

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