Composite perforated wood-plastic sound absorption wallboard

Abstract

This utility model provides a composite perforated wood-plastic composite sound-absorbing wall panel, relating to the technical field of building materials. The composite perforated wood-plastic composite sound-absorbing wall panel comprises, from top to bottom, a veneer layer, a wood-plastic composite layer, and a sound-absorbing layer. The veneer layer has evenly distributed through-holes, and the wood-plastic composite layer has sound-absorbing grooves. The through-holes and sound-absorbing grooves are interconnected, and the sound-absorbing grooves are dovetail grooves. The total thickness of the wall panel is ≤19mm. This utility model achieves a significant improvement in the sound absorption performance of the composite wall panel by designing through-holes in the veneer layer, designing sound-absorbing grooves communicating with the through-holes in the wood-plastic composite layer (designing the sound-absorbing grooves in the dovetail groove form), and then designing a sound-absorbing layer on the bottom surface of the wood-plastic composite layer. The sound absorption principle of this utility model is: using the Helmholtz resonance principle, combined with the oblique wall reflection of the dovetail groove and the excellent sound absorption performance of the wood-plastic composite material itself, to achieve a synergistic effect and significantly improve the sound absorption performance of the composite wall panel.

Description

Technical Field

[0001] This utility model relates to the technical field of building materials, specifically to a composite perforated wood-plastic sound-absorbing wall panel. Background Technology

[0002] Composite wall panels are a new generation of high-performance building partitions produced industrially. They are composed of various building materials or multi-layer structures. Common composite wall panels include gypsum board, aluminum alloy panels, or wood wall panels. Composite wall panels have comprehensive advantages such as high strength, light weight, environmental friendliness, heat insulation, fire resistance, moisture resistance, and quick installation, making them an ideal energy-saving wall material for modern buildings.

[0003] However, in the production process of composite wall panels with sound insulation function, the usual method is to add an additional layer, such as adding a sound insulation layer to the composite wall panel, or adding sound-absorbing pads through perforations in the composite wall panel structure. However, these two common sound insulation methods not only have unsatisfactory sound insulation effects, but also produce composite wall panels that are generally thick, which is a drawback in terms of installation convenience, aesthetics, and lightweight properties. Furthermore, the production process of composite wall panels often uses cement as a raw material, resulting in high costs. Therefore, this utility model proposes a composite perforated wood-plastic composite sound-absorbing wall panel to solve the problems existing in the prior art. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a composite perforated wood-plastic sound-absorbing wall panel, which solves the technical problems of poor sound insulation technology and excessive thickness of existing composite wall panels, leading to a series of practical defects.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: A composite perforated wood-plastic sound-absorbing wall panel includes, from top to bottom, a door skin layer, a wood-plastic layer, and a sound-absorbing layer; the door skin layer has evenly distributed through holes, the wood-plastic layer has sound-absorbing grooves, the through holes and the sound-absorbing grooves are interconnected, the sound-absorbing grooves are dovetail grooves, and the total thickness of the wall panel is ≤19mm.

[0006] Preferably, the connection between the bottom and side surfaces of the dovetail groove is provided with a groove bottom fillet with a radius of 1.5mm.

[0007] Preferably, the included angle between the side surface and the bottom surface is the groove interior angle, which is 68-70°.

[0008] Preferably, the dovetail groove has a depth of 12mm, a groove opening diameter of 8mm, and a groove bottom diameter of 15.8mm.

[0009] Preferably, the dovetail groove is milled along the length of the wood-plastic layer, and a plurality of through holes are arrayed along the length of one of the dovetail grooves, wherein the diameter of the through holes is smaller than the groove width of the dovetail groove.

[0010] Preferably, the bottom of the dovetail groove is not milled through, and the bottom surface of the groove is 4mm away from the bottom surface of the wood-plastic layer.

[0011] Preferably, the door skin layer is 2mm thick and the through hole diameter is 6mm.

[0012] Preferably, the distance between the centers of adjacent through holes is 28 mm.

[0013] Preferably, the wood-plastic layer is made of wood-plastic foam board with a foaming density of 0.50-0.54 g / cm³.

[0014] Preferably, the sound-absorbing layer has a thickness of 1 mm.

[0015] (III) Beneficial Effects This utility model provides a composite perforated wood-plastic sound-absorbing wall panel. Compared with the prior art, it has the following advantages: 1. This utility model achieves a significant improvement in the sound absorption performance of composite wall panels by designing through holes in the door skin layer, designing sound-absorbing grooves that communicate with the through holes in the wood-plastic composite layer, designing the sound-absorbing grooves in the form of dovetail grooves, and then designing a sound-absorbing layer on the bottom surface of the wood-plastic composite layer. The sound absorption principle of this utility model is as follows: by adopting the Helmholtz resonance principle, combined with the reflection of the oblique wall of the dovetail groove and the excellent sound absorption performance of the wood-plastic composite material itself, a synergistic effect is achieved, which greatly improves the sound absorption performance of the composite wall panels.

[0016] 2. The sound absorption performance of the dovetail groove of this utility model is stronger than that of the straight groove on the market. The principle is that after the sound wave enters the dovetail groove, due to the multiple reflections formed by the inclined wall, the number of sound waves colliding with the inclined wall increases exponentially, the wear loss increases by 40%, and the energy dissipation rate is reduced by 60% compared with the straight groove. The bottom of the dovetail groove has a larger volume than that of the straight groove, the energy storage capacity is enhanced, and the low-frequency resonance performance is improved. Therefore, it can absorb or dissipate more sound waves.

[0017] 3. This invention designs the through holes and dovetail grooves as interconnected structures. Multiple through holes are evenly distributed in an array along a single dovetail groove. Sound waves are partially lost through collisions within these through holes, and the remaining sound waves enter the dovetail groove, where a large amount of residual sound is absorbed. Therefore, the combined effect of just one dovetail groove and multiple through holes can absorb a significant amount of sound wave energy. The multiple dovetail grooves milled into the wood-plastic composite layer in this invention greatly enhance the sound absorption performance of the composite wall panel.

[0018] 4. The total thickness of the wall panel designed in this utility model is ≤19mm, while the thickness of commonly used sound-absorbing wall panels on the market is greater than 25mm. It is common knowledge that the thicker the wall panel, the better the sound absorption effect. However, this utility model improves the sound absorption performance of the wall panel while reducing its thickness. According to current technology, reducing the total thickness of the wall panel to 19mm while improving its sound absorption performance is close to the technical limit for the minimum thickness of sound-absorbing wall panels. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the wall panel in this embodiment; Figure 2 This is a top view of the door skin structure in this embodiment; Figure 3 This is a top view of the wood-plastic composite layer in this embodiment; Figure 4 This is a cross-sectional schematic diagram of the door skin layer and the wood-plastic composite layer in this embodiment; Figure 5 This is a cross-sectional schematic diagram of the dovetail groove in this embodiment.

[0021] Among them, 1. Door skin layer; 11. Through hole; 2. Wood-plastic layer; 21. Dovetail groove; 211. Groove bottom rounded corner; 22. Groove; 3. Sound-absorbing layer. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] This invention provides a composite perforated wood-plastic absorbent wall panel, which solves the technical problems of poor sound insulation technology and excessive thickness of existing composite wall panels, leading to a series of practical defects.

[0024] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0025] like Figure 1 As shown, a composite perforated wood-plastic sound-absorbing wall panel includes, from top to bottom, a door skin layer 1, a wood-plastic layer 2, and a sound-absorbing layer 3, with a total thickness of 19mm.

[0026] Combination Figure 2 As shown, the door skin layer 1 is a diamond door skin layer 1, with dimensions of 1188×600×2mm. The door skin layer 1 has evenly distributed through holes 11, each with a diameter of 6mm, which penetrate the door skin layer 1 from top to bottom and are evenly distributed on the door skin layer 1. The distance between the centers of adjacent through holes 11 is 28mm, and the distance from the outermost through hole 11 to both the long and short sides of the door skin layer 1 is 34mm.

[0027] By setting the diameter of the through hole 11 to 6mm, this solution increases the diameter of the through hole 11 compared to existing technologies. While ensuring the quality of the composite wall panel, it increases the perforation rate to 3.92%, the resonance peak width to 180Hz, and the friction area of ​​the sound wave in the through hole 11 to 56.5mm. 2 / hole, therefore, the door skin layer 1 of this solution has superior wave absorption performance.

[0028] Combination Figure 3 As shown, the wood-plastic layer 2 is made of wood-plastic foam board with dimensions of 1188×600×16mm. The foam density of the wood-plastic foam board is 0.52 g / cm³, and it contains many micropores. These micropores have a certain sound absorption effect and provide excellent sound absorption compensation for mid-to-high frequency sounds, thus providing an auxiliary effect to enhance the overall sound absorption performance of the composite wall panel.

[0029] Combination Figure 3 , Figure 4 , Figure 5 As shown, dovetail grooves 21 are provided on the wood-plastic layer 2. There are multiple dovetail grooves 21, which are milled through along the length direction of the wood-plastic layer 2 and evenly distributed along the width direction of the wood-plastic layer 2.

[0030] A dovetail groove 21 is opened on the wood-plastic layer 2. After the sound wave enters the dovetail groove 21, due to the multiple reflections formed by the inclined wall, the number of sound waves colliding with the inclined wall increases exponentially, the wear loss increases by 40%, and the energy dissipation rate is reduced by 60% compared with the straight groove. The bottom of the dovetail groove 21 has a larger volume than the straight groove, the energy storage capacity is enhanced, and the low-frequency resonance performance is improved, so it can absorb or dissipate more sound waves.

[0031] The dovetail groove 21 has a groove depth of 12mm, with 4mm left unmilled at the bottom, a groove opening width of 8mm, a groove bottom diameter of 15.8mm, and a groove length of 1188mm.

[0032] By designing the parameters of the dovetail groove 21 to the specific values ​​mentioned above, the best sound absorption effect can be achieved, with an NRC noise reduction coefficient of 0.79 and a peak α coefficient of 0.91. It is particularly effective in absorbing mid-frequency sound waves (500-1000Hz).

[0033] The dovetail groove 21 includes a bottom surface and a side surface, and the connection between the bottom surface and the side surface is provided with a groove bottom fillet 211 with a radius of 1.5mm.

[0034] The bottom of the dovetail groove 21 is set to a rounded corner with a radius of 1.5mm. Compared with a right angle, a rounded corner is more conducive to the reflection of sound waves, increases the number of reflections and sound wave loss, and thus brings a better sound absorption effect.

[0035] The angle between the bottom surface and the side surface is the groove interior angle, which is 69°. That is to say, the angle between the side wall of the dovetail groove 21 and the vertical direction is 21°.

[0036] With the inner angle of the groove set to 69°, that is, the angle between the sidewall and the vertical direction set to 21°, the sound wave forms multiple reflections due to the setting of the inclined wall. The number of sound waves colliding with the inclined wall increases exponentially, wear loss increases by 40%, and energy dissipation rate is reduced by 60% compared with straight groove.

[0037] The through holes 11 on the door skin layer 1 are interconnected with the dovetail groove 21. Multiple through holes 11 are arrayed on a dovetail groove 21 and are evenly distributed along the length of the dovetail groove 21.

[0038] In this invention, the through hole 11 and the dovetail groove 21 are designed to be connected. Multiple through holes 11 are evenly distributed on a dovetail groove 21. The sound wave has already lost part of its energy through collision in the multiple through holes 11. The remaining sound wave enters the dovetail groove 21, which absorbs a large amount of residual wave. Therefore, the cooperation between just one dovetail groove 21 and multiple through holes 11 can absorb a large amount of sound wave energy.

[0039] The door skin layer 1 and the wood-plastic composite layer 2 are connected by edge sealing. The wood-plastic composite layer has a groove 22 on its periphery to facilitate splicing. The tight connection between the wood-plastic composite layer 2 and the door skin layer 1 is conducive to providing mechanical support for the double-layer structure, especially the door skin layer 1. Therefore, after increasing the diameter of the through hole 11 on the door skin layer 1, the mechanical properties of the door skin layer 1 will not be damaged, and it still has excellent processing performance.

[0040] The sound-absorbing layer 3 is made of sound-absorbing pads with a thickness of 1mm and is glued to the side of the wood-plastic layer 2 without the dovetail groove 21. The sound-absorbing layer 3 has an auxiliary sound-absorbing effect and also has a certain auxiliary mechanical support effect, ensuring that the composite wall panel has excellent mechanical properties while reducing the thickness of the composite wall panel in this solution.

[0041] In summary, compared with existing technologies, it has the following beneficial effects: 1. This utility model achieves a significant improvement in the sound absorption performance of composite wall panels by designing through holes in the door skin layer, designing sound-absorbing grooves communicating with the through holes in the wood-plastic composite layer, designing the sound-absorbing grooves in the form of dovetail grooves, and then designing a sound-absorbing layer on the bottom surface of the wood-plastic composite layer. The sound absorption principle of this utility model is as follows: adopting the Helmholtz resonance principle, with a perforation rate of 3.14%, a resonance frequency of approximately 780Hz, and a sound absorption coefficient of 0.92, combined with the reflection of the dovetail groove's inclined wall and the excellent sound absorption performance of the wood-plastic composite material itself, a synergistic effect is achieved, greatly improving the sound absorption performance of the composite wall panels.

[0042] 2. The sound absorption performance of the dovetail groove of this utility model is stronger than that of the straight groove on the market. The principle is that after the sound wave enters the dovetail groove, due to the multiple reflections formed by the inclined wall, the number of sound waves colliding with the inclined wall increases exponentially, the wear loss increases by 40%, and the energy dissipation rate is reduced by 60% compared with the straight groove. The bottom of the dovetail groove has a larger volume than that of the straight groove, the energy storage capacity is enhanced, and the low-frequency resonance performance is improved. Therefore, it can absorb or dissipate more sound waves.

[0043] 3. This invention designs the through holes and dovetail grooves as interconnected structures. Multiple through holes are evenly distributed in an array along a single dovetail groove. Sound waves are partially lost through collisions within these through holes, and the remaining sound waves enter the dovetail groove, where a large amount of residual sound is absorbed. Therefore, the combined effect of just one dovetail groove and multiple through holes can absorb a significant amount of sound wave energy. The multiple dovetail grooves milled into the wood-plastic composite layer in this invention greatly enhance the sound absorption performance of the composite wall panel.

[0044] 4. The total thickness of the wall panel designed in this utility model is ≤19mm, while the thickness of commonly used sound-absorbing wall panels on the market is greater than 25mm. It is common knowledge that the thicker the wall panel, the better the sound absorption effect. However, this utility model improves the sound absorption performance of the wall panel while reducing its thickness. According to current technology, reducing the total thickness of the wall panel to 19mm while improving its sound absorption performance is close to the technical limit for the minimum thickness of sound-absorbing wall panels.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A composite perforated wood-plastic sound-absorbing wall panel, characterized in that, From top to bottom, it includes a door skin layer, a wood-plastic composite layer, and a sound-absorbing layer; the door skin layer has evenly distributed through holes, the wood-plastic composite layer has sound-absorbing grooves, the through holes and the sound-absorbing grooves are interconnected, the sound-absorbing grooves are dovetail grooves, and the total thickness of the wall panel is ≤19mm.

2. The composite perforated wood-plastic sound-absorbing wall panel as described in claim 1, characterized in that, The connection between the bottom and side surfaces of the dovetail groove is provided with a groove bottom fillet with a radius of 1.5mm.

3. The composite perforated wood-plastic sound-absorbing wall panel as described in claim 2, characterized in that, The included angle between the side surface and the bottom surface is the groove interior angle, which is 68-70°.

4. The composite perforated wood-plastic sound-absorbing wall panel as described in claim 3, characterized in that, The dovetail groove has a depth of 12mm, a groove opening diameter of 8mm, and a groove bottom diameter of 15.8mm.

5. The composite perforated wood-plastic sound-absorbing wall panel as described in claim 4, characterized in that, The dovetail groove is milled along the length of the wood-plastic layer, and a plurality of through holes are arrayed along the length of one of the dovetail grooves, wherein the diameter of the through holes is smaller than the width of the opening of the dovetail groove.

6. The composite perforated wood-plastic sound-absorbing wall panel as described in claim 5, characterized in that, The bottom of the groove is 4mm away from the bottom of the wood-plastic layer.

7. The composite perforated wood-plastic sound-absorbing wall panel as described in claim 1, characterized in that, The door skin layer is 2mm thick, and the through hole diameter is 6mm.

8. The composite perforated wood-plastic sound-absorbing wall panel as described in claim 1, characterized in that, The distance between the centers of adjacent through holes is 28 mm.

9. The composite perforated wood-plastic sound-absorbing wall panel as described in claim 1, characterized in that, The wood-plastic layer is made of wood-plastic foam board with a foaming density of 0.50-0.54 g / cm³.

10. The composite perforated wood-plastic sound-absorbing wall panel as described in claim 1, characterized in that, The sound-absorbing layer has a thickness of 1 mm.

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