Sound-absorbing and noise-reducing punched aluminum veneer assembly

Abstract

The utility model relates to aluminum veneer technical field, and disclose a kind of sound-absorbing and noise-reducing punched aluminum veneer assembly, including punched aluminum plate, its front surface is equipped with fluorocarbon roller coating, back surface is equipped with electrophoresis closed layer;Three-dimensional net rack layer, set in punched aluminum plate back side, by macromolecular polyester fibre through hot melt adhesion and form dense hexagonal pyramid three-dimensional skeleton, microcavity of intercommunication is formed between skeleton;Microgranular sound-absorbing core material, fill in microcavity, microgranular sound-absorbing core material is modified expanded perlite particle with surface coating hydrophobic coating;Back cavity aluminum foil glass fiber cloth composite layer, set in three-dimensional net rack layer far from the side of punched aluminum plate.The utility model is through the fourfold coupling sound-absorbing structure of punched aluminum plate, three-dimensional net rack layer, microgranular sound-absorbing core material, sealed back cavity, while maintaining ultrathin, light, significantly improve the mid-high frequency sound-absorbing performance, and core material has excellent moisture-proof, anti-sink ability, realizes long-term stable noise reduction.

Description

Technical Field

[0001] This utility model relates to the field of aluminum single-panel technology, and in particular to a sound-absorbing and noise-reducing perforated aluminum single-panel assembly. Background Technology

[0002] With the increasing demands for integrated indoor acoustics and decoration in large public buildings, rail transit, and data center projects, traditional soundproof ceilings can no longer meet the multiple requirements of being lightweight, aesthetically pleasing, easy to maintain, and highly efficient in sound absorption. Perforated aluminum panels, due to their lightweight, weather resistance, and high plasticity, are widely used in building curtain walls and interior ceilings.

[0003] The resonant sound absorption formed by perforation of the plate has limited effect in the mid-to-high frequency range, and the noise reduction coefficient (NRC) is usually no more than 0.35, which cannot meet the acoustic indicators of noise-concentrated areas such as swimming pools and train station platforms. To solve the above defects, the existing technology mainly adopts the following three solutions: ① Directly attach glass wool or rock wool to the back of the perforated aluminum plate to dissipate sound energy through porous materials; ② Use aluminum honeycomb panels as backing to form Helmholtz resonance sound absorption by utilizing the closed cavity of the honeycomb core; ③ Add a secondary skeleton behind the perforated plate and fill it with polyester fiber felt, and then cover it with aluminum foil to form a thin cavity.

[0004] While the above methods can improve sound absorption to some extent, they also have the problem of glass wool sinking when it gets damp, resulting in uneven distribution of the sound-absorbing layer and local acoustic performance failure. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, this utility model provides a sound-absorbing and noise-reducing perforated aluminum single panel assembly to solve the problem of uneven distribution of sound-absorbing layer and local acoustic performance failure caused by the sinking of glass wool due to moisture.

[0006] This utility model provides a sound-absorbing and noise-reducing perforated aluminum panel assembly, comprising:

[0007] Perforated aluminum sheet with a fluorocarbon roller coating on the front and an electrophoretic sealing layer on the back;

[0008] A three-dimensional mesh layer is disposed on one side of the back of the perforated aluminum plate. It is formed by hot-melt bonding of high molecular polyester fibers to form a densely packed hexagonal pyramidal three-dimensional skeleton, and the skeleton forms interconnected microcavities.

[0009] Microparticle sound-absorbing core material is filled in the microcavity. The microparticle sound-absorbing core material is modified expanded perlite particles with a hydrophobic coating on the surface.

[0010] A cavity aluminum foil fiberglass cloth composite layer is disposed on the side of the three-dimensional mesh layer away from the perforated aluminum plate;

[0011] A fireproof and moisture-proof membrane is applied to the outer surface of the aluminum foil fiberglass cloth composite layer in the back cavity. The fireproof and moisture-proof membrane is a PVDF flame-retardant membrane.

[0012] Preferably, the hydrophobic coating consists of a nano-SiO2 inorganic layer and a fluorosilane layer from the inside out.

[0013] Preferably, the front side of the three-dimensional mesh layer is bonded to the back side of the perforated aluminum plate by dot-bonding with high-temperature resistant epoxy adhesive, and the back side of the three-dimensional mesh layer is bonded to the inner surface of the back cavity aluminum foil fiberglass cloth composite layer by dot-bonding with high-temperature resistant epoxy adhesive.

[0014] Preferably, the decorative surface of the perforated aluminum plate and the exposed surface of the back cavity aluminum foil fiberglass cloth composite layer are both covered with a peelable protective film, which can be removed during the construction stage.

[0015] Preferably, the dotted bonding array of the high-temperature resistant epoxy adhesive is distributed in a plum blossom shape, so that the three-dimensional mesh layer and the perforated aluminum plate and the back cavity aluminum foil fiberglass cloth composite layer maintain a uniform spacing and form a continuous acoustic cavity.

[0016] Preferably, the perforated aluminum plate has folded edges around its perimeter. These folded edges are rolled inward and wrap around the outer edge of the back cavity aluminum foil fiberglass cloth composite layer to encapsulate the three-dimensional mesh layer between the perforated aluminum plate and the back cavity aluminum foil fiberglass cloth composite layer.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model uses a quadruple coupling sound absorption structure consisting of a perforated aluminum plate, a three-dimensional mesh layer, a micro-particle sound-absorbing core material, and a sealed back cavity. While maintaining an ultra-thin and lightweight design, it significantly improves the mid-to-high frequency sound absorption performance. Furthermore, the core material has excellent moisture-proof and anti-sinking capabilities, achieving long-term stable noise reduction.

[0019] 2. This utility model encapsulates each functional layer into an integrated module by applying plum blossom-shaped adhesive and rolling the edges around the module. This creates a continuous acoustic cavity and enables the single board to be quickly replaced without tools, greatly reducing the difficulty of installation and subsequent maintenance. It is particularly suitable for scenarios where space is limited and frequent maintenance is required. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall main structure of this utility model;

[0021] Figure 2 This is a partial cross-sectional view of the overall main view of this utility model;

[0022] Figure 3 This is a schematic diagram of the right-side cross-sectional planar structure of the three-dimensional space frame layer of this utility model;

[0023] Figure 4This is an exploded structural diagram of the three-dimensional mesh frame layer and the back cavity aluminum foil fiberglass cloth composite layer of this utility model.

[0024] Numbering on the map:

[0025] 1. Perforated aluminum plate; 2. Three-dimensional mesh frame layer; 3. Micro-particle sound-absorbing core material; 4. Back cavity aluminum foil fiberglass cloth composite layer; 5. Fireproof and moisture-proof membrane. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figure 1-4 As shown, this utility model has the following two specific embodiments.

[0028] Example 1

[0029] A sound-absorbing and noise-reducing perforated aluminum panel assembly includes a perforated aluminum panel 1, which has a fluorocarbon roller coating on the front and an electrophoretic sealing layer on the back.

[0030] The three-dimensional mesh layer 2 is set on one side of the back of the perforated aluminum plate 1. It is formed by hot-melt bonding of high molecular polyester fibers to form a densely packed hexagonal pyramidal three-dimensional skeleton, and the skeleton forms interconnected microcavities.

[0031] Microparticle sound-absorbing core material 3 is filled in the micro cavity. The microparticle sound-absorbing core material 3 is modified expanded perlite particles with a hydrophobic coating on the surface.

[0032] The aluminum foil fiberglass cloth composite layer 4 is located on the side of the three-dimensional grid layer 2 away from the perforated aluminum plate 1.

[0033] Fireproof and moisture-proof membrane 5 covers the outer surface of the aluminum foil fiberglass cloth composite layer 4 in the back cavity. Fireproof and moisture-proof membrane 5 is a PVDF flame-retardant membrane.

[0034] In this embodiment, as Figures 1-4 As shown, the three-dimensional mesh layer 2 has a densely packed hexagonal pyramid skeleton made of high-molecular polyester fibers that are hot-melted together to form a continuous microcavity; the modified expanded perlite particles are coated with a hydrophobic coating and then filled into the microcavity; the aluminum foil fiberglass cloth composite layer 4 with the aluminum foil facing outwards is rolled and interlocked with the perforated aluminum plate 1 around the perimeter; the PVDF flame-retardant film is applied to the outer surface of the aluminum foil and heat-sealed to form a complete seal.

[0035] Example 2

[0036] The difference from Example 1 is that this example discloses a coating, bonding, and encapsulation structure;

[0037] The hydrophobic coating consists of a nano-SiO2 inorganic layer and a fluorosilane layer from the inside out.

[0038] The front side of the three-dimensional mesh layer 2 is bonded to the back side of the perforated aluminum plate 1 by high-temperature resistant epoxy adhesive in a dotted manner, and the back side of the three-dimensional mesh layer 2 is bonded to the inner surface of the back cavity aluminum foil fiberglass cloth composite layer 4 by high-temperature resistant epoxy adhesive in a dotted manner.

[0039] The decorative surface of the perforated aluminum plate 1 and the exposed surface of the back cavity aluminum foil fiberglass cloth composite layer 4 are covered with a peelable protective film, which can be removed during the construction stage.

[0040] The dotted bonding array of the high-temperature resistant epoxy adhesive is distributed in a plum blossom shape, which makes the three-dimensional mesh layer 2, the perforated aluminum plate 1, and the back cavity aluminum foil fiberglass cloth composite layer 4 maintain a uniform spacing and form a continuous acoustic cavity.

[0041] The perforated aluminum plate 1 has folded edges around its perimeter. These folded edges are rolled inward and wrap around the outer edge of the back cavity aluminum foil fiberglass cloth composite layer 4 to encapsulate the three-dimensional mesh layer 2 between the perforated aluminum plate 1 and the back cavity aluminum foil fiberglass cloth composite layer 4.

[0042] In this embodiment, as Figures 2-4 As shown, the surface of expanded perlite particles is sequentially covered with a nano-SiO2 inorganic layer and a fluorosilane layer. By utilizing the synergistic effect of micro-nano roughness and low surface energy, the particles as a whole acquire hydrophobic, moisture-proof, and salt spray resistant properties, while maintaining the integrity of the porous structure, ensuring long-term stability of sound absorption performance in high humidity environments.

[0043] High-temperature resistant epoxy adhesive is applied in a plum blossom dot matrix to bond the front of the three-dimensional mesh layer 2 to the back of the perforated aluminum plate 1 and the back to the inner surface of the back cavity aluminum foil fiberglass cloth composite layer 4, forming a uniform and continuous acoustic cavity. This avoids the adhesive layer blocking the sound wave channel. At the same time, the dotted elastic connection buffers the thermal expansion and contraction stress, maintaining high bonding strength while maintaining the overall sound absorption effect.

[0044] The exposed surfaces of the perforated aluminum plate 1 decorative surface and the back cavity aluminum foil fiberglass cloth composite layer 4 are covered with a peelable protective film, which can be directly removed during the construction stage.

[0045] The perforated aluminum plate 1 is rolled inward around its four sides and wrapped around the outer edge of the aluminum foil and fiberglass cloth composite layer 4 in the back cavity, thus encapsulating the three-dimensional grid layer 2 into an integrated module.

[0046] The working principle of this utility model is as follows:

[0047] External sound waves enter the interior through the micropores on the surface of the perforated aluminum plate 1. They are reflected and scattered multiple times in the continuous microcavities formed by the three-dimensional mesh layer 2 and the slits and pores between the modified expanded perlite particles, and are dissipated by viscosity. The densely packed hexagonal pyramid skeleton expands the specific surface area and increases the sound energy attenuation path. At the same time, the closed cavity formed by the aluminum foil fiberglass cloth composite layer 4 and the perforated aluminum plate 1 generates the Helmholtz resonance effect, further absorbing low-frequency sound energy. The plum blossom-shaped dotted epoxy adhesive keeps the spacing between the layers uniform, ensuring that the sound wave channel is unobstructed and avoiding the obstruction and reflection of sound waves by the adhesive layer. The nano-SiO2 inorganic layer and the fluorosilane layer work together to give the particles overall hydrophobic, moisture-proof and salt spray resistant properties. They can still maintain the integrity of the porous structure in high humidity environments and the sound absorption performance is stable for a long time. The PVDF flame-retardant film and the four-sided folded and rolled encapsulation together form a fireproof and moisture-proof barrier to prevent water vapor and dust from entering and maintain a constant internal acoustic environment, thereby achieving efficient, durable and maintenance-free sound absorption and noise reduction functions.

[0048] Although the disclosure is as stated above, the scope of protection of this disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this utility model.

Claims

1. A sound-absorbing and noise-reducing perforated aluminum panel assembly, characterized in that, include: A perforated aluminum plate (1) has a fluorocarbon roller coating on its front side and an electrophoretic sealing layer on its back side. A three-dimensional mesh layer (2) is set on one side of the back of the perforated aluminum plate (1). It is formed by hot-melt bonding of high molecular polyester fibers to form a densely packed hexagonal pyramidal three-dimensional skeleton, and the skeleton forms interconnected microcavities. Microparticle sound-absorbing core material (3) is filled in the micro cavity. The microparticle sound-absorbing core material (3) is modified expanded perlite particles with a hydrophobic coating on the surface. A cavity aluminum foil fiberglass cloth composite layer (4) is disposed on the side of the three-dimensional mesh layer (2) away from the perforated aluminum plate (1); A fireproof and moisture-proof membrane (5) is applied to the outer surface of the back cavity aluminum foil fiberglass cloth composite layer (4). The fireproof and moisture-proof membrane (5) is a PVDF flame-retardant membrane.

2. The sound-absorbing and noise-reducing perforated aluminum single-panel assembly according to claim 1, characterized in that, The hydrophobic coating consists of a nano-SiO2 inorganic layer and a fluorosilane layer from the inside out.

3. The sound-absorbing and noise-reducing perforated aluminum single-panel assembly according to claim 1, characterized in that, The front side of the three-dimensional mesh layer (2) is bonded to the back side of the perforated aluminum plate (1) by high-temperature resistant epoxy adhesive in a dotted manner, and the back side of the three-dimensional mesh layer (2) is bonded to the inner surface of the back cavity aluminum foil fiberglass cloth composite layer (4) by high-temperature resistant epoxy adhesive in a dotted manner.

4. The sound-absorbing and noise-reducing perforated aluminum single-panel assembly according to claim 1, characterized in that, The decorative surface of the perforated aluminum plate (1) and the exposed surface of the back cavity aluminum foil fiberglass cloth composite layer (4) are both covered with a peelable protective film, which can be removed during the construction stage.

5. The sound-absorbing and noise-reducing perforated aluminum single-panel assembly according to claim 3, characterized in that, The dotted bonding array of the high-temperature resistant epoxy adhesive is distributed in a plum blossom shape, so that the three-dimensional mesh layer (2) and the perforated aluminum plate (1) and the back cavity aluminum foil fiberglass cloth composite layer (4) maintain a uniform spacing and form a continuous acoustic cavity.

6. The sound-absorbing and noise-reducing perforated aluminum single-panel assembly according to claim 1, characterized in that, The perforated aluminum plate (1) has folded edges around its perimeter. These folded edges are rolled inward and cover the outer edge of the back cavity aluminum foil fiberglass cloth composite layer (4) to encapsulate the three-dimensional mesh layer (2) between the perforated aluminum plate (1) and the back cavity aluminum foil fiberglass cloth composite layer (4).

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