Multi-layered tapered cavity composite plywood

Abstract

This utility model discloses a multi-layer conical cavity composite plywood, which, from top to bottom, consists of a surface layer, a flame-retardant layer, an upper microporous noise-reducing layer, an upper core layer, a middle layer, a lower core layer, a lower microporous noise-reducing layer, a moisture-proof layer, and a bottom layer. The surface layer is made of oak, the flame-retardant layer is made of antimony trioxide modified non-woven fabric, and the moisture-proof layer is made of aluminum foil. The upper and lower microporous noise-reducing layers have noise-reducing micropores, the upper and lower core layers have noise-reducing conical holes, the middle layer is embedded with rectangular melamine foam board, and the surface of the surface layer also has microgrooves. This plywood achieves multiple functions through a multi-layer structure. The various noise-reducing structures work together to reflect, refract, and absorb sounds of different frequencies multiple times, significantly reducing noise; the flame-retardant layer effectively improves fire resistance; and the aluminum foil moisture-proof layer can prevent moisture intrusion and extend service life. Its structural design is reasonable and can meet the needs of various places for flame retardancy, noise reduction, and moisture protection of the plywood.

Description

Technical Field

[0001] This utility model relates to the field of plywood technology, specifically to multi-layer conical cavity composite plywood. Background Technology

[0002] As people's demands for the quality of their living and working environments continue to rise, the need for indoor noise control is becoming increasingly urgent. In meeting rooms, bedrooms, recording studios, and other similar spaces, a quiet environment is crucial for activities such as meetings, rest, sleep, and audio recording. However, plywood currently on the market has significant shortcomings in noise reduction performance.

[0003] Most existing plywood systems rely solely on the material itself for noise reduction, lacking specialized noise-reduction structural designs. Their noise reduction principle primarily depends on the density of the plywood itself to simply reflect sound. This method has some blocking effect on mid-to-high frequency sounds, but its noise reduction capability is very limited when facing low-frequency noises, such as the sound of air conditioner outdoor units or vibrations from vehicles. Furthermore, some plywood systems with basic noise reduction functions often have their noise-reduction structures located inside the plywood, making it difficult for sound to fully contact the structure during propagation. This results in insufficient sound energy loss and an inability to effectively reduce noise intensity. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] The technical problem this invention aims to solve is that traditional plywood relies on a single material for noise reduction, lacking a specialized noise reduction structure design, resulting in insufficient noise reduction capability.

[0006] (II) Technical Solution

[0007] To solve the above problems, this utility model provides the following technical solution:

[0008] The multi-layer conical cavity composite plywood consists of, from top to bottom, a surface layer, a flame-retardant layer, an upper microporous noise-reducing layer, an upper core layer, a middle layer, a lower core layer, a lower microporous noise-reducing layer, a moisture-proof layer, and a bottom layer.

[0009] The surface layer is made of oak and is attached to the flame-retardant layer by adhesive.

[0010] The flame-retardant layer is made of antimony trioxide modified non-woven fabric and is bonded between the surface layer and the upper microporous noise reduction layer by adhesive.

[0011] Both the upper microporous noise reduction layer and the lower microporous noise reduction layer are made of wood, and both the upper microporous noise reduction layer and the lower microporous noise reduction layer are provided with multiple noise reduction micropores;

[0012] Both the upper core layer and the lower core layer are made of wood, and both the upper core layer and the lower core layer are provided with multiple noise-reducing conical holes;

[0013] The upper core layer and the lower core layer are mirror images of each other, and the intermediate layer is disposed between the upper core layer and the lower core layer;

[0014] The larger end of the noise-reducing cone hole on the upper core layer is located near the lower end face of the upper microporous noise-reducing layer, and the larger end of the noise-reducing cone hole on the lower core layer is located near the upper end face of the lower microporous noise-reducing layer.

[0015] The moisture-proof layer is disposed between the lower microporous noise-reducing layer and the bottom layer.

[0016] Furthermore, the moisture-proof layer is made of aluminum foil, and the bottom layer is made of wood.

[0017] Furthermore, the pore size of the noise-reducing micropores is no greater than millimeters.

[0018] Furthermore, the noise-reducing cone holes are provided in multiples and arranged in a matrix.

[0019] Furthermore, the thickness of the surface layer is millimeters.

[0020] Furthermore, the upper surface of the surface layer is provided with micro-grooves, and multiple micro-grooves are arranged in an array on the upper surface of the surface layer.

[0021] Furthermore, the intermediate layer has a rectangular frame structure, and a rectangular melamine foam board is glued to the middle of the intermediate layer.

[0022] (III) Beneficial Effects

[0023] The beneficial effects of this utility model are:

[0024] By employing a multi-layered structure, with each layer performing a different function, the problem of limited functionality in existing plywood is effectively solved. The flame-retardant layer improves the plywood's flame-retardant properties and enhances safety. The microgrooves in the surface layer, the upper and lower microporous noise-reducing layers, and the noise-reducing structures in the upper and lower core layers work synergistically to achieve excellent noise reduction, making it suitable for various environments with noise control requirements. The moisture-proof layer effectively prevents moisture intrusion, extending the plywood's lifespan. Furthermore, the surface layer design is not only aesthetically pleasing but also enhances practicality. The overall structure is rational, functionally diverse, and possesses high market application value. Attached image description:

[0025] Figure 1 This is an exploded view of the present invention;

[0026] Figure 2 This is a schematic diagram of the noise-reducing conical hole of this utility model.

[0027] The markings in the diagram are: 1-Top layer, 2-Flame retardant layer, 3-Upper microporous noise reduction layer, 4-Upper core layer, 5-Middle layer, 6-Lower core layer, 7-Lower microporous noise reduction layer, 8-Moisture-proof layer, 9-Bottom layer, 10-Noise reduction micropores, 11-Noise reduction conical holes, 12-Rectangular melamine foam board, 13-Micro grooves. Detailed Implementation

[0028] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Please see Figures 1-2 The multi-layer conical cavity composite plywood shown has, from top to bottom, a surface layer 1, a flame-retardant layer 2, an upper microporous noise-reducing layer 3, an upper core layer 4, a middle layer 5, a lower core layer 6, a lower microporous noise-reducing layer 7, a moisture-proof layer 8, and a bottom layer 9.

[0031] The surface layer 1 is made of oak, which is known for its beautiful grain and hard texture, enhancing the plywood's appearance and durability. Surface layer 1 is firmly bonded to the flame-retardant layer 2 using adhesive. Flame-retardant layer 2 is made of antimony trioxide-modified non-woven fabric. Antimony trioxide has excellent flame-retardant properties. This modified non-woven fabric is bonded between surface layer 1 and the upper microporous noise-reducing layer 3, effectively preventing flame spread, improving the plywood's flame-retardant rating, and providing more reliable fire safety for the environment.

[0032] Both the upper microporous noise reduction layer 3 and the lower microporous noise reduction layer 7 are made of wood, and each layer has multiple noise reduction micropores 10, with a pore diameter of no more than 1 mm. These tiny pores can reflect and absorb sound multiple times, thereby achieving a noise reduction effect. When sound propagates, it enters the noise reduction micropores 10 and rubs against the pore walls, converting some of the sound energy into heat energy, thus reducing the intensity of sound propagation.

[0033] Both the upper core layer 4 and the lower core layer 6 are made of wood, and each has multiple noise-reducing cone holes 11 arranged in a matrix. The upper core layer 4 and the lower core layer 6 are mirror images of each other. The larger opening end of the noise-reducing cone hole 11 on the upper core layer 4 is located near the lower end face of the upper microporous noise-reducing layer 3, while the larger opening end of the noise-reducing cone hole 11 on the lower core layer 6 is located near the upper end face of the lower microporous noise-reducing layer 7. This conical cavity structure further enhances the noise reduction effect. After sound enters the noise-reducing cone hole 11, it is continuously reflected and refracted within the cone cavity, and the sound energy is greatly dissipated, effectively blocking the transmission of noise.

[0034] The intermediate layer 5 has a rectangular frame structure, and a rectangular melamine foam board 12 is glued to the middle of the intermediate layer 5. The melamine foam board is lightweight and has good sound absorption properties, which can further improve the noise reduction performance of the plywood and reduce the overall weight of the plywood.

[0035] A moisture-proof layer 8 is positioned between the lower microporous noise-reducing layer 7 and the bottom layer 9. The moisture-proof layer 8 is made of aluminum foil, which has excellent moisture-proof properties and can effectively prevent moisture from penetrating the plywood. The bottom layer 9 is made of wood, providing stable support for the plywood.

[0036] In addition, the thickness of the surface layer 1 is 2 mm, which reasonably controls the overall thickness of the plywood while ensuring aesthetics and durability. The upper surface of the surface layer 1 is provided with multiple micro-grooves 13 arranged in an array. The micro-grooves 13 not only increase the friction of the surface layer 1 and prevent the surface from slipping, but also play a role in dispersing stress to a certain extent. They can also reflect sound through the groove-like structure to achieve noise reduction.

[0037] Working principle:

[0038] The sound encounters surface layer 1, where the microgrooves 13 scatter the sound. Once inside the microgrooves 13, the sound's propagation direction changes, and it is continuously reflected within the grooves, increasing the path length of the sound propagation. This increases the contact area between the sound and the surface layer 1 material, allowing more sound energy to be converted into heat energy and dissipated during friction with the surface layer material, thus achieving initial noise reduction. Simultaneously, because surface layer 1 reflects sound, some sound is also directly reflected back.

[0039] Next, the sound passes through the surface layer 1 and reaches the flame-retardant layer 2. The flame-retardant layer 2 mainly serves a flame-retardant function and has little impact on sound propagation. Subsequently, the sound enters the upper microporous noise reduction layer 3. The noise reduction micropores 10 perform preliminary reflection and absorption of the sound, consuming some of the sound energy.

[0040] Then, the sound continues to propagate to the upper core layer 4. The noise-reducing cone holes 11 on the upper core layer 4 utilize the cone cavity structure to cause the sound to be continuously reflected and refracted within the cone cavity, further dissipating the sound energy. When the sound passes through the middle layer 5, the melamine foam board 12 in the middle layer 5 absorbs the sound energy again due to its excellent sound absorption properties.

[0041] The sound then travels to the lower core layer 6, where the noise-reducing cone holes 11 work in conjunction with those of the upper core layer 4 to further block and absorb the sound. The sound then passes through the lower microporous noise-reducing layer 7, where the noise-reducing micropores 10 perform final processing to further reduce the sound intensity.

[0042] In terms of moisture protection, when moisture from the external environment comes into contact with the plywood, the moisture-proof layer 8 is made of aluminum foil. The dense structure of the aluminum foil can effectively block moisture and prevent moisture from penetrating into the interior of the plywood, thereby protecting the internal structure of the plywood from moisture damage and extending the service life of the plywood.

[0043] The embodiments are detailed, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-layer conical cavity composite plywood, characterized in that: From top to bottom, the following layers are provided: surface layer (1), flame retardant layer (2), upper microporous noise reduction layer (3), upper core layer (4), middle layer (5), lower core layer (6), lower microporous noise reduction layer (7), moisture-proof layer (8) and bottom layer (9); The surface layer (1) is made of oak wood and is attached to the flame retardant layer (2) by adhesive. The flame retardant layer (2) is made of antimony trioxide modified non-woven fabric and is bonded between the surface layer (1) and the upper microporous noise reduction layer (3) by adhesive bonding. The upper microporous noise reduction layer (3) and the lower microporous noise reduction layer (7) are both made of wood, and both the upper microporous noise reduction layer (3) and the lower microporous noise reduction layer (7) are provided with multiple noise reduction micropores (10); Both the upper core layer (4) and the lower core layer (6) are made of wood, and both the upper core layer (4) and the lower core layer (6) are provided with multiple noise-reducing cone holes (11); The upper core layer (4) and the lower core layer (6) are arranged in a mirror image, and the middle layer (5) is disposed between the upper core layer (4) and the lower core layer (6); The larger end of the noise reduction cone hole (11) on the upper core layer (4) is located near the lower end face of the upper microporous noise reduction layer (3), and the larger end of the noise reduction cone hole (11) on the lower core layer (6) is located near the upper end face of the lower microporous noise reduction layer (7). The moisture-proof layer (8) is disposed between the lower microporous noise reduction layer (7) and the bottom layer (9).

2. The multi-layer conical cavity composite plywood according to claim 1, characterized in that: The moisture-proof layer (8) is made of aluminum foil, and the bottom layer (9) is made of wood.

3. The multi-layer conical cavity composite plywood according to claim 2, characterized in that: The pore size of the noise reduction micropore (10) is no greater than 1 mm.

4. The multi-layer conical cavity composite plywood according to claim 3, characterized in that: The noise reduction cone hole (11) is provided in multiple ways and arranged in a matrix.

5. The multi-layer conical cavity composite plywood according to claim 4, characterized in that: The thickness of the surface layer (1) is 2 mm.

6. The multi-layer conical cavity composite plywood according to claim 5, characterized in that: The upper surface of the surface layer (1) is provided with micro-grooves (13), and the micro-grooves (13) are arranged in an array on the upper surface of the surface layer (1).

7. The multi-layer conical cavity composite plywood according to claim 1, characterized in that: The intermediate layer (5) has a rectangular frame structure, and a rectangular melamine foam board (12) is glued to the middle of the intermediate layer (5).

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