Sound-absorbing and noise-reducing PVC plate

Abstract

The utility model discloses a kind of sound-absorbing and noise-reducing PVC board, including PVC substrate, the upper surface of PVC substrate is provided with micro-perforation in array distribution, the micro-perforation is 0.1mm-0.5mm, the micro-hole array of hole spacing is 1mm-5mm is formed;Located the concave cavity of equal-interval distribution is provided with in the lower surface of the PVC substrate, the depth of the concave cavity is 5mm-30mm.The utility model is communicated by micro-perforation and concave cavity and forms resonance unit, utilizes the resonance effect of sound wave between micro-hole and cavity and consumes sound energy;The cavity combination of different depth, shape and distribution density, can be aimed at specific frequency optimization resonance absorption;Formed directly on PVC substrate by micro-perforation and concave cavity, avoid multilayer composite structure, reduce plate weight, damping coating strengthens sound absorption at the same time, inhibit plate vibration sound transmission, improve overall sound insulation.

Description

Technical Field

[0001] This utility model relates to the field of building decoration materials technology, and more specifically, it relates to a sound-absorbing and noise-reducing PVC board. Background Technology

[0002] With the rapid development of the plastics industry, polyvinyl chloride (PVC), as a widely used synthetic resin material, is widely applied in fields such as construction, automobiles, electronics, and packaging due to its excellent chemical resistance, moldability, and economy.

[0003] In the current technology, PVC boards are mostly used as flooring or wall cladding panels. However, when PVC boards are used as wall cladding panels, the following problems still exist:

[0004] 1. Currently, the common method to reduce noise is to press patterns onto the surface of PVC boards to enhance their ability to scatter sound waves. However, this method mainly works on mid-to-high frequency sound waves, and its effect on attracting and dissipating the more critical and difficult-to-handle low-frequency noise is very limited. Therefore, its overall actual noise reduction performance is often unsatisfactory.

[0005] 2. Attaching sound-absorbing cotton to PVC panels can significantly improve sound absorption and noise reduction. However, this results in increased overall thickness and weight, higher material costs, and a more complicated installation process. Furthermore, long-term use of sound-absorbing cotton carries the risk of moisture damage and performance degradation due to aging. Improper selection of sound-absorbing cotton may also pose a potential threat to the overall fire safety performance of the building.

[0006] 3. Using high-density materials to fill PVC boards for sound absorption and noise reduction does not significantly improve the sound absorption coefficient, resulting in limited improvement. Furthermore, the filling process inevitably increases the weight of the board, raising raw material costs and increasing production complexity, making it uneconomical.

[0007] Therefore, there is an urgent need for a sound-absorbing and noise-reducing PVC board. Utility Model Content

[0008] (a) Technical problems to be solved

[0009] In view of the problems existing in the prior art, this utility model provides a sound-absorbing and noise-reducing PVC board to solve the technical problems mentioned in the background art.

[0010] Technical solution

[0011] To achieve the above objectives, this utility model provides the following technical solution: a sound-absorbing and noise-reducing PVC board, comprising a PVC substrate, wherein the upper surface of the PVC substrate is provided with an array of micro-perforations, the micro-perforations having a diameter of 0.1mm-0.5mm and a spacing of 1mm-5mm; and wherein the lower surface of the PVC substrate is provided with equally spaced recessed cavities, the recessed cavities having a depth of 5mm-30mm.

[0012] The present invention is further configured such that the micro-perforation is connected to the adjacent recessed cavity.

[0013] The present invention is further configured such that the shape of the recessed cavity is hemispherical, frustum-shaped, square, or hexagonal.

[0014] The present invention is further configured such that the inner surface of the recessed cavity is coated with a damping material layer.

[0015] The present invention is further configured such that the recessed cavity is filled with a lightweight porous sound-absorbing block, and the PVC substrate is attached with a cover plate.

[0016] The present invention is further provided that a recessed portion is provided on one side of the PVC substrate, and a sealing sheet is fixedly connected in the recessed portion.

[0017] The present invention is further provided that a protrusion is provided on the other side of the PVC substrate, the protrusion is fixedly connected to two sealing strips, and the recess is provided with two limiting grooves.

[0018] The present invention is further provided that the sealing strip has a through hole in the middle and the protrusion has an inclined surface.

[0019] Beneficial effects

[0020] Compared with the prior art, this utility model provides a sound-absorbing and noise-reducing PVC board, which has the following beneficial effects:

[0021] 1. This utility model forms a resonant unit by connecting micro-perforations and recessed cavities, and consumes sound energy by utilizing the resonance effect of sound waves between the micro-perforations and cavities; the combination of cavities with different depths, shapes and distribution densities can optimize resonance absorption for specific frequencies.

[0022] 2. This utility model forms micro-perforations and recessed cavities directly on the PVC substrate, avoiding multi-layer composite structures, reducing the weight of the board, and the damping coating enhances sound absorption while suppressing the vibration and sound transmission of the board, thereby improving the overall sound insulation.

[0023] 3. This utility model eliminates the sound leakage problem of splicing gaps by installing a tongue and groove structure with a sealing strip, thus ensuring the consistency of overall acoustic performance. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the front structure of a sound-absorbing and noise-reducing PVC board according to the present invention;

[0025] Figure 2 This is a bottom view structural diagram of a sound-absorbing and noise-reducing PVC board according to the present invention;

[0026] Figure 3 This is a side view of the PVC board for sound absorption and noise reduction according to this utility model.

[0027] Figure 4 This is a cross-sectional view of the PVC substrate and cover plate in this utility model.

[0028] Figure 5 This is a schematic diagram of the PVC substrate and sealing strip in this utility model.

[0029] In the figure: 1. PVC substrate; 2. Micro-perforation; 3. Recessed cavity; 4. Damping material layer; 5. Porous sound-absorbing block; 6. Cover plate; 7. Recessed part; 8. Sealing sheet; 9. Protrusion; 10. Sealing strip; 11. Limiting groove; 12. Through hole; 13. Inclined surface. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0032] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0033] Please see Figures 1-5A sound-absorbing and noise-reducing PVC board includes a PVC substrate 1. The upper surface of the PVC substrate 1 is provided with an array of micro-perforations 2, each with a diameter of 0.1mm-0.5mm and a spacing of 1mm-5mm. The lower surface of the PVC substrate 1 is provided with equally spaced recessed cavities 3, each with a depth of 5mm-30mm. The micro-perforations 2 are connected to adjacent recessed cavities 3. The micro-perforations 2 are directly formed on the PVC substrate 1 layer by laser drilling or molding. The recessed cavities are integrally molded on the back side of the PVC substrate 1 layer using a mold. The recessed cavities 3 and the micro-perforations 2 work together to form a multi-stage Helmholtz resonator. Each cavity and its corresponding micro-perforation 2 area in front constitute a sound-absorbing unit. Cavities of different depths, sizes, and distribution densities can resonate and absorb sound waves of different frequencies. The recessed cavity 3 is hemispherical, frustum-shaped, square, or hexagonal. The inner surface of the recessed cavity 3 is coated with a damping material layer 4, which converts the mechanical energy of the resonant cavity wall panel vibration into heat energy, further widening the sound absorption band, especially improving the mid-to-low frequency sound absorption performance, while also increasing the sound insulation effect of the board. The coating thickness is controlled between 0.1mm and 1.0mm to avoid completely filling the cavity. The recessed cavity 3 is filled with lightweight porous sound-absorbing blocks 5, and a cover plate 6 is adhered to the PVC substrate 1. The porous sound-absorbing blocks 5 can increase the sound absorption of the PVC substrate 1. The frictional loss of sound waves within the cavity is reduced, thus improving the sound absorption coefficient. A recessed portion 7 is provided on one side of the PVC substrate 1, and a sealing sheet 8 is fixedly attached to the recessed portion. A protrusion 9 is provided on the other side of the PVC substrate 1, and two sealing strips 10 are fixedly attached to the protrusion 9. Two limiting grooves 11 are provided in the recessed portion. A through hole 12 is provided in the middle of the sealing strip 10, and an inclined surface 13 is provided at the protrusion 9. The protrusion 9 is inserted into the recessed portion 7, and the sealing strip 10 is pressed against the sealing sheet 8 to reduce sound leakage from gaps when splicing the PVC substrates 1. The sealing strip 10 is snapped into the limiting groove 11 to improve the connection strength between the PVC substrates 1.

[0034] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sound-absorbing and noise-reducing PVC board, comprising a PVC substrate (1), characterized in that: The upper surface of the PVC substrate (1) is provided with an array of micro-perforations (2), the micro-perforations (2) having a diameter of 0.1mm-0.5mm and a spacing of 1mm-5mm, forming an array of micro-perforations; the lower surface of the PVC substrate (1) is provided with equally spaced recessed cavities (3), the depth of which is 5mm-30mm.

2. The sound-absorbing and noise-reducing PVC board according to claim 1, characterized in that: The micro-perforation (2) is connected to the adjacent recessed cavity (3).

3. The sound-absorbing and noise-reducing PVC board according to claim 2, characterized in that: The concave cavity (3) is hemispherical, frustum-shaped, square, or hexagonal.

4. The sound-absorbing and noise-reducing PVC board according to claim 3, characterized in that: The inner surface of the recessed cavity (3) is coated with a damping material layer (4).

5. The sound-absorbing and noise-reducing PVC board according to claim 4, characterized in that: The recessed cavity (3) is filled with a lightweight porous sound-absorbing block (5), and the PVC substrate (1) is covered with a cover plate (6).

6. The sound-absorbing and noise-reducing PVC board according to claim 5, characterized in that: A recess (7) is provided on one side of the PVC substrate (1), and a sealing sheet (8) is fixedly connected in the recess.

7. The sound-absorbing and noise-reducing PVC board according to claim 6, characterized in that: The PVC substrate (1) has a protrusion (9) on the other side, and two sealing strips (10) are fixed to the protrusion (9). The recessed part has two limiting grooves (11).

8. The sound-absorbing and noise-reducing PVC board according to claim 7, characterized in that: The sealing strip (10) has a through hole (12) in the middle and an inclined surface (13) is provided at the protrusion (9).

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