Aluminum plate sound absorbing panel having sandwich structure

Abstract

The utility model discloses an aluminum plate sound absorption board with interlayer structure, including upper perforated aluminum plate layer, lower perforated aluminum plate layer and intermediate sound absorption core layer, still including the honeycomb support structure in intermediate sound absorption core layer inside, intermediate sound absorption core layer is arranged between two and is fixed through thermosetting adhesive bonding, intermediate sound absorption core layer is composed of gradient density sound absorption cotton, and its density decreases from center to both sides along the thickness direction, the honeycomb support structure is embedded in the inside of intermediate sound absorption core layer, and is arranged and is composed by hexagonal aluminum honeycomb unit, upper perforated aluminum plate layer and lower perforated aluminum plate layer edge adopt edge covering aluminum section frame closed seal, the utility model discloses compared with prior art advantage lies in: through setting honeycomb support structure, the overall structural strength of sound absorption board is enhanced significantly, intermediate sound absorption core layer adopts gradient density sound absorption cotton, and its density decreases from center to both sides along the thickness direction, can carry out the targeted absorption to the sound wave of different frequency, simultaneously, effectively widen the sound absorption band of sound absorption board.

Description

Technical Field

[0001] This utility model relates to the technical field of sound-absorbing panel devices, specifically to an aluminum plate sound-absorbing panel with a sandwich structure. Background Technology

[0002] In modern architectural decoration, industrial equipment noise reduction, and acoustic space design, aluminum acoustic panels have become widely used acoustic materials due to their lightweight, fire resistance, and corrosion resistance. Traditional aluminum acoustic panels often employ a single-layer perforated aluminum plate with a backing of sound-absorbing cotton. This structure suffers from limitations in practical applications, such as insufficient structural strength and susceptibility to deformation. While some sandwich-structured acoustic panels improve structural strength to some extent, the use of homogeneous core materials limits their noise absorption frequency band. Furthermore, these types of panels generally lack internal support structures, leading to gradual compression and failure of the core material under pressure after prolonged use, severely impacting the panel's lifespan and acoustic performance. Utility Model Content

[0003] (I) Technical Issues

[0004] This invention addresses the problems of insufficient structural strength, easy deformation, limited sound absorption band, and easy compression failure of the core layer in traditional aluminum sound-absorbing panels. It provides a sandwich-structured aluminum sound-absorbing panel that is structurally stable, can effectively absorb broadband noise, and has a long service life.

[0005] (II) Technical Content

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: an aluminum plate sound-absorbing panel with a sandwich structure, including an upper perforated aluminum plate layer, a lower perforated aluminum plate layer, and a middle sound-absorbing core layer, and also including a honeycomb support structure located inside the middle sound-absorbing core layer; the upper perforated aluminum plate layer and the lower perforated aluminum plate layer are arranged in parallel, and the middle sound-absorbing core layer is sandwiched between the two and fixed by bonding with a thermosetting adhesive; the middle sound-absorbing core layer is composed of gradient density sound-absorbing cotton, the density of which decreases from the center to both sides along the thickness direction; the honeycomb support structure is embedded in the middle sound-absorbing core layer and is composed of hexagonal aluminum honeycomb units; the edges of the upper perforated aluminum plate layer and the lower perforated aluminum plate layer are sealed by an edge-wrapping aluminum profile frame.

[0007] Furthermore, the perforation rate of the upper perforated aluminum plate layer is 15%–30%, and the hole diameter is 0.8–2 mm; the perforation rate of the lower perforated aluminum plate layer is 5%–15%, and the hole diameter is 0.5–1 mm, and the perforation positions of the upper and lower perforated aluminum plate layers are staggered.

[0008] Furthermore, the height of the honeycomb unit of the honeycomb support structure is 70%–90% of the thickness of the middle sound-absorbing core layer, and cavities of 0.5–2 mm are reserved between its top and bottom end faces and the inner walls of the upper and lower perforated aluminum plate layers, respectively, and the cavities are filled with thermosetting adhesive.

[0009] Furthermore, the inner side of the edge-wrapped aluminum profile frame is provided with a slot, and the edges of the upper perforated aluminum plate layer and the lower perforated aluminum plate layer are embedded in the slot and fixed with bolts.

[0010] Furthermore, the gradient density sound-absorbing cotton is composed of multiple layers of polyester fiber cotton, with the density of the multiple layers of polyester fiber cotton decreasing sequentially from the center outwards, and the polyester fiber cotton in the central layer having the highest density.

[0011] (III) Technical Effects

[0012] The advantages of this utility model compared with the prior art are as follows:

[0013] 1. By setting up a honeycomb support structure, which is composed of hexagonal aluminum honeycomb units and embedded in the middle sound-absorbing core layer, the top and bottom end faces of the honeycomb support structure are filled with thermosetting adhesives to form a stable support system, which significantly enhances the overall structural strength of the sound-absorbing panel and effectively avoids deformation and core layer compression failure caused by long-term use.

[0014] 2. The middle sound-absorbing core layer uses gradient density sound-absorbing cotton, with the density decreasing from the center to both sides along the thickness direction, which can specifically absorb sound waves of different frequencies. At the same time, the different perforation rates, pore diameters, and staggered perforation positions of the upper and lower perforated aluminum plate layers work together to effectively broaden the sound absorption band of the sound-absorbing panel, taking into account the sound absorption performance of low, mid and high frequencies, and meeting the noise reduction needs of complex acoustic environments. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the aluminum plate sound-absorbing panel with a sandwich structure according to this utility model. Figure 1 .

[0016] Figure 2 This is a three-dimensional structural diagram of the aluminum plate sound-absorbing panel with a sandwich structure according to this utility model. Figure 2 .

[0017] Figure 3 This is a three-dimensional structural diagram of the aluminum plate sound-absorbing panel with a sandwich structure according to this utility model. Figure 3 .

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the aluminum plate sound-absorbing panel with a sandwich structure according to this utility model.

[0019] Figure 5This is a schematic diagram of area A of the aluminum plate sound-absorbing panel with a sandwich structure according to this utility model.

[0020] As shown in the figure: 1. Upper perforated aluminum plate layer; 2. Lower perforated aluminum plate layer; 3. Middle sound-absorbing core layer; 4. Honeycomb support structure; 5. Cavity; 6. Edge-wrapped aluminum profile frame; 7. Slot. Detailed Implementation

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", etc., 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 utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," 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 utility model according to the specific circumstances.

[0023] The present invention will now be described in further detail with reference to the accompanying drawings.

[0024] Combined with appendix Figure 1 To be continued Figure 5 The aluminum sound-absorbing panel with a sandwich structure includes an upper perforated aluminum plate layer 1, a lower perforated aluminum plate layer 2, and a middle sound-absorbing core layer 3, and also includes a honeycomb support structure 4 located inside the middle sound-absorbing core layer 3; the upper perforated aluminum plate layer 1 and the lower perforated aluminum plate layer 2 are arranged in parallel, and the middle sound-absorbing core layer 3 is sandwiched between the two and fixed by thermosetting adhesive; the middle sound-absorbing core layer 3 is composed of gradient density sound-absorbing cotton, the density of which decreases from the center to both sides along the thickness direction; the honeycomb support structure 4 is embedded inside the middle sound-absorbing core layer 3 and is composed of hexagonal aluminum honeycomb units; the edges of the upper perforated aluminum plate layer 1 and the lower perforated aluminum plate layer 2 are sealed by an edge-wrapping aluminum profile frame 6.

[0025] The perforation rate of the upper perforated aluminum plate layer 1 is 15%–30%, and the hole diameter is 0.8–2 mm; the perforation rate of the lower perforated aluminum plate layer 2 is 5%–15%, and the hole diameter is 0.5–1 mm, and the perforation positions of the upper perforated aluminum plate layer 1 and the lower perforated aluminum plate layer 2 are staggered.

[0026] The height of the honeycomb unit of the honeycomb support structure 4 is 70%–90% of the thickness of the middle sound-absorbing core layer 3. A cavity 5 of 0.5–2 mm is reserved between its top and bottom end faces and the inner walls of the upper perforated aluminum plate layer 1 and the lower perforated aluminum plate layer 2, respectively. The cavity 5 is filled with thermosetting adhesive.

[0027] The inner side of the edge-wrapped aluminum profile frame 6 is provided with a slot 7, and the edges of the upper perforated aluminum plate layer 1 and the lower perforated aluminum plate layer 2 are embedded in the slot 7 and fixed with bolts.

[0028] The gradient density sound-absorbing cotton is composed of multiple layers of polyester fiber cotton. The density of the multiple layers of polyester fiber cotton decreases from the center to the outside, with the highest density of polyester fiber cotton located in the center layer.

[0029] The working principle of this utility model is as follows: When sound waves propagate to the aluminum plate sound-absorbing panel with a sandwich structure, the perforation rate of the upper perforated aluminum plate layer 1 is 15%–30%, and the hole diameter is 0.8–2mm. The larger perforation rate and hole diameter allow high-frequency sound waves to enter the interior of the sound-absorbing panel more easily. The perforation rate of the lower perforated aluminum plate layer 2 is 5%–15%, and the hole diameter is 0.5–1mm. The perforation positions of the lower perforated aluminum plate layer 2 are staggered with those of the upper perforated aluminum plate layer 1. This design helps to absorb low-frequency sound waves and reduces the possibility of sound waves directly penetrating the sound-absorbing panel.

[0030] When sound waves enter the sound-absorbing panel, they encounter the middle sound-absorbing core layer 3, which is composed of gradient density sound-absorbing cotton. The density of the core layer decreases from the center to both sides along the thickness direction. The multi-layer polyester fiber cotton composite structure allows sound waves of different frequencies to interact with polyester fiber cotton of different densities during propagation according to their own characteristics. High-frequency sound waves are largely absorbed in the denser central layer, while low-frequency sound waves are consumed in the relatively loose outer layer, thus achieving effective absorption of broadband sound waves.

[0031] Gradient density sound-absorbing cotton is composed of three layers of polyester fiber composite, with the middle polyester fiber having a density of 80 kg / m³. 3 The polyester fiber cotton on both sides has a density of 50 kg / m³. 3 .

[0032] The honeycomb support structure 4, located inside the intermediate sound-absorbing core layer 3, is composed of hexagonal aluminum honeycomb units. The height of each honeycomb unit is 70%–90% of the thickness of the intermediate sound-absorbing core layer 3. Cavities 5, each 0.5–2 mm in diameter, are pre-formed between the top and bottom faces of the honeycomb unit and the inner walls of the upper perforated aluminum plate layer 1 and the lower perforated aluminum plate layer 2, respectively. These cavities 5 are filled with thermosetting adhesive. This structure not only enhances the overall strength of the sound-absorbing panel but also further improves its acoustic performance through the combination of the cavities 5 and the thermosetting adhesive. This allows sound waves to be reflected and absorbed multiple times within the cavities, enhancing the sound absorption effect. Ultimately, through the synergistic effect of all components, efficient absorption and blocking of sound waves are achieved, resulting in excellent sound absorption and noise reduction.

[0033] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An aluminum sound-absorbing panel with a sandwich structure, comprising an upper perforated aluminum plate layer (1), a lower perforated aluminum plate layer (2), and a middle sound-absorbing core layer (3), characterized in that: It also includes a honeycomb support structure (4) located inside the middle sound-absorbing core layer (3); The upper perforated aluminum plate layer (1) and the lower perforated aluminum plate layer (2) are arranged in parallel, and the middle sound-absorbing core layer (3) is sandwiched between the two and fixed by thermosetting adhesive; the middle sound-absorbing core layer (3) is composed of gradient density sound-absorbing cotton, and its density decreases from the center to both sides along the thickness direction; the honeycomb support structure (4) is embedded in the middle sound-absorbing core layer (3) and is composed of hexagonal aluminum honeycomb units; the edges of the upper perforated aluminum plate layer (1) and the lower perforated aluminum plate layer (2) are sealed by an edge-wrapped aluminum profile frame (6).

2. The aluminum plate sound-absorbing panel with a sandwich structure according to claim 1, characterized in that: The perforation rate of the upper perforated aluminum plate layer (1) is 15%–30%, and the hole diameter is 0.8–2 mm; the perforation rate of the lower perforated aluminum plate layer (2) is 5%–15%, and the hole diameter is 0.5–1 mm, and the perforation positions of the upper perforated aluminum plate layer (1) and the lower perforated aluminum plate layer (2) are staggered.

3. The aluminum plate sound-absorbing panel with a sandwich structure according to claim 1, characterized in that: The height of the honeycomb unit of the honeycomb support structure (4) is 70%–90% of the thickness of the middle sound-absorbing core layer (3). A cavity (5) of 0.5–2 mm is reserved between its top and bottom end faces and the inner walls of the upper perforated aluminum plate layer (1) and the lower perforated aluminum plate layer (2), respectively. The cavity (5) is filled with thermosetting adhesive.

4. The aluminum plate sound-absorbing panel with a sandwich structure according to claim 1, characterized in that: The inner side of the edge-wrapped aluminum profile frame (6) is provided with a slot (7), and the edges of the upper perforated aluminum plate layer (1) and the lower perforated aluminum plate layer (2) are embedded in the slot (7) and fixed by bolts.

5. The aluminum plate sound-absorbing panel with a sandwich structure according to claim 1, characterized in that: The gradient density sound-absorbing cotton is composed of multiple layers of polyester fiber cotton. The density of the multiple layers of polyester fiber cotton decreases from the center to the outside, with the highest density of polyester fiber cotton located in the center layer.

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