A reinforced soundproofing PET corrugated sheet structure

Abstract

The utility model discloses a PET wave shape board structure of reinforcing sound insulation, and the opposite face of first wave board, second wave board all is provided with the connecting portion and wave portion of position corresponding, the wave portion recesses and forms the wave structure to the direction of the top surface of connecting portion back, and the connecting portion of both opposite sealing connection fixed, and the wave portion of both after connecting opposite forms a plurality of cavities, and the cavity is provided with the protrusion to the sound insulation column of a plurality of inwards and the abutment of sound insulation column, and the first wave board, the upper and lower end of second wave board is embedded with the detachable connection's sealing cover. The utility model discloses through the cavity, the sound insulation column and the protrusion of cavity inner wall's cooperation form whole sound insulation system, can realize the absorption and the barrier ability of board material to different frequency sound wave to improve significantly, compares the PET sound insulation board of traditional wave shape hollow structure, and the sound insulation effect promotes significantly, can satisfy the place of sound insulation requirement higher, such as telephone booth, sound insulation screen etc.

Description

Technical Field

[0001] This utility model relates to the field of PET sheet technology, and in particular to a PET corrugated sheet structure for enhanced sound insulation. Background Technology

[0002] Traditional sound insulation panels often employ a single structure or simple multi-layer stacking, offering limited absorption and blocking capabilities for sound waves. For PET sound insulation panels with a corrugated hollow structure, the energy of sound waves is primarily dissipated through reflection and refraction of sound waves within the cavity, as well as through the viscous resistance of air. However, for mid-to-low frequency sound waves, their longer wavelengths allow them to easily bypass the undulating corrugated structure, making effective attenuation difficult. Consequently, the overall sound insulation effect cannot meet the requirements of some high-standard sound insulation scenarios. Furthermore, the strength and rigidity of corrugated hollow structure panels are relatively low, making them prone to deformation under external forces or during long-term use. Once the panel deforms, the shape and size of the cavity change, thereby affecting the propagation and absorption of sound waves within the cavity. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a PET corrugated sheet structure that improves the ability of the sheet to absorb and block sound waves.

[0004] The objective of this utility model is achieved through the following technical solution: A sound-insulating PET corrugated sheet structure includes a first corrugated plate and a second corrugated plate arranged opposite each other. The first corrugated plate and the second corrugated plate each have a corresponding connecting part and a corrugated part on their opposite surfaces. The corrugated part is recessed in the direction away from the top surface of the connecting part to form a corrugated structure. The connecting parts of the first corrugated plate and the second corrugated plate are sealed and fixed relative to each other. After connection, the two corrugated parts form multiple cavities relative to each other. Sound-absorbing and sound-insulating columns are arranged in the cavities. Several protrusions are arranged on the inner wall of the cavities facing and abutting against the sound-absorbing and sound-insulating columns. The upper and lower ends of the first corrugated plate and the second corrugated plate are fitted with detachable sealing caps.

[0005] In one preferred embodiment, the second corrugated board is a composite board of PET and rubber.

[0006] In a preferred embodiment, honeycomb holes are provided on the surfaces of the first wave plate and the second wave plate.

[0007] In a preferred embodiment, the sound-absorbing and insulating column comprises, from the outside to the inside, a sound-insulating felt layer, a glass wool layer, and a polyester fiber cotton layer, wherein the density of the sound-insulating felt layer is greater than that of the glass wool layer, and the density of the glass wool layer is greater than that of the polyester fiber cotton layer.

[0008] In a preferred embodiment, the two ends of the sound-absorbing and insulating column abut against the sealing cover.

[0009] In a preferred embodiment, the connecting portion of the first wave plate and the second wave plate is snapped or glued together for a sealed connection and fixation.

[0010] In a preferred embodiment, the sealing cap is tightly fitted to the two corrugated portions on opposite side walls.

[0011] In a preferred embodiment, the sealing cap has two opposite sidewalls with locking posts, and the inner walls of the two corrugated portions have locking holes corresponding to the positions of the locking posts on the contact surfaces with the sidewalls of the sealing cap, and the locking posts engage with the locking holes.

[0012] In a preferred embodiment, the sealing cap connected to the upper ends of the first and second wave plates is provided with an outwardly convex strip, and the outer surface of the sealing cap connected to the lower ends of the first and second wave plates is provided with a groove, and the shape and size of the convex strip and the groove are mutually matched.

[0013] Compared with the prior art, the present invention has at least the following advantages: 1. The PET corrugated sheet structure of this utility model forms a sound insulation system through the synergy of a cavity, sound-absorbing and sound-insulating columns, and protrusions on the inner wall of the cavity. The cavity causes sound waves to be reflected and refracted multiple times, consuming energy; the sound-absorbing and sound-insulating column structure absorbs and isolates sound waves over a wide frequency range; the protrusions on the inner wall of the cavity increase the number of sound wave reflections and scatterings, further dispersing sound wave energy, and ensuring the relative positional stability of the sound-absorbing and sound-insulating columns and the cavity, preventing changes from affecting the sound insulation effect of the cavity and the sound-absorbing and sound-insulating columns. In other words, this utility model can significantly improve the absorption and blocking ability of the sheet material for sound waves of different frequencies. Compared with traditional corrugated hollow PET sound insulation sheets, the sound insulation effect is significantly improved, meeting the needs of places with high sound insulation requirements, such as telephone booths and soundproof screens.

[0014] 2. The PET corrugated sheet structure of this utility model has protrusions on the inner wall of the cavity that abut against the sound-absorbing and insulating columns. This not only enhances the stability of the sound-absorbing and insulating columns, but also increases the overall rigidity of the cavity structure through interaction. At the same time, the sealing cover plays a role in fixing and supporting the corrugated sheet, further improving the overall structural stability of the sheet. The two work together to reduce the problem of reduced sound insulation performance caused by structural loosening or deformation.

[0015] 3. The PET corrugated sheet structure of this utility model has certain modular features, and can be combined and spliced ​​according to actual needs to adapt to sound insulation spaces of different shapes and sizes, thereby improving the flexibility and efficiency of manufacturing and installation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.

[0017] Figure 1 This is a schematic diagram of the assembled sound-insulating PET corrugated sheet structure of this utility model. Figure 2 This is a schematic diagram of the first wave plate structure in one embodiment of the present invention; Figure 3 This is a schematic diagram of the second wave plate structure in one embodiment of the present invention; Figure 4 This is a schematic diagram of the sealing cap in one embodiment of the present invention. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be given below with reference to the accompanying drawings.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should also be understood that the terms "upper," "lower," "concave surface," "convex surface," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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.

[0020] like Figures 1 to 4 A sound-insulating PET corrugated sheet structure includes a first corrugated sheet 100 and a second corrugated sheet 200. Both the first corrugated sheet 100 and the second corrugated sheet 200 have corrugated portions 210 and connecting portions 220. The connecting portions 220 of the first corrugated sheet 100 and the second corrugated sheet 200 are sealed and fixed to each other. The corrugated portions are recessed in the direction away from the top surface of the connecting portion to form a corrugated structure. After connection, multiple cavities 230 are formed between the two corrugated portions 210. Sound-absorbing and sound-insulating columns 300 are provided in the cavities 230. Several protrusions 231 are provided on the inner wall of the cavities 230, facing and abutting against the sound-absorbing and sound-insulating columns 300. The upper and lower ends of the first corrugated sheet 100 and the second corrugated sheet 200 are fitted with detachable sealing caps 400.

[0021] It should be noted that when sound waves propagate to the wavy surfaces of the first wave plate 100 and the second wave plate 200, they will undergo multiple reflections on different wave slopes. Each reflection will cause a certain degree of energy loss in the sound waves; and the wave sections 210 of the two plates form several cavity structures 230, which is equivalent to setting multiple air layers, further hindering the propagation of sound waves; when sound waves propagate within the cavity 230, they will encounter the sound-absorbing and insulating columns 300 within the cavity 230, which further increase the propagation resistance, while also absorbing a large amount of sound wave energy; the inner wall of the cavity 230 is provided with protrusions 231 facing and abutting against the sound-absorbing and insulating columns 300. On the one hand, the sound waves propagating within the cavity 230 will undergo irregular reflections when they encounter the protrusions 231, making the propagation path of the sound waves more tortuous, and the sound wave energy will be lost in multiple reflections. During the secondary reflection process, the sound is continuously consumed. On the other hand, the protrusion 231 can fix the sound-absorbing and insulating column 300 to a certain extent. When the board is subjected to external force or vibration, the protrusion 231 can restrict the movement of the sound-absorbing and insulating column 300, prevent it from shaking in the cavity 230, and ensure that the sound-absorbing and insulating column 300 and the inner wall of the cavity 230 remain relatively stable, thus ensuring the stability of the sound insulation structure and ensuring that the sound-absorbing material can play a continuous and effective role. The upper and lower ends of the two corrugated plates 100 and 200 are fitted with removable sealing caps 400. The sealing caps 400 are tightly fitted with the corrugated plates 100 and 200, preventing sound from propagating through these parts and improving the overall sound insulation effect of the board.

[0022] In this embodiment, both the first corrugated plate 100 and the second corrugated plate 200 are made of PET substrate with added rubber particles. It should be noted that rubber particles have good elasticity and flexibility. When using a PET substrate with added rubber particles, the corrugated plate may be subjected to repeated loads during actual use, such as thermal expansion and contraction caused by temperature changes, external vibrations, etc. When the plate is subjected to external forces, the rubber particles can absorb and disperse energy through their own deformation, thereby effectively improving the flexibility and impact resistance of the corrugated plate, alleviating stress concentration inside the PET matrix, and reducing the propagation of fatigue cracks caused by repeated stress. Furthermore, those skilled in the art will understand that adding rubber particles of different particle sizes and contents can adjust the acoustic properties of the material, giving the PET substrate a wider frequency response characteristic.

[0023] Honeycomb holes (not shown in the figure) are provided on the wave portions 210 of the first wave plate 100 and the second wave plate 200. It is understood that honeycomb holes of different sizes and shapes have different absorption and blocking effects on sound waves of different frequencies. By rationally designing the parameters of the honeycomb holes, the sound insulation frequency range of the board can be further broadened. The design of the honeycomb holes can be completed in one step during the molding process of the first wave plate 100 and the second wave plate 200 through mold design, or it can be achieved by coating the first wave plate 100 and the second wave plate 200 with a coating that can form honeycomb holes.

[0024] In some embodiments, the sound-absorbing and insulating column comprises, from the outside to the inside, a sound-absorbing felt layer, a glass wool layer, and a polyester fiber cotton layer, wherein the density of the sound-absorbing felt layer is greater than that of the glass wool layer, and the density of the glass wool layer is greater than that of the polyester fiber cotton layer.

[0025] It should be noted that the sound-absorbing and insulating column 300, due to its columnar structure and regular shape, is relatively easy to install into the cavity 230 and can be placed in the predetermined position with relatively high accuracy. When sound waves enter the cavity 230 and encounter the sound-absorbing and insulating column 300, the columnar design allows the sound waves to be reflected and scattered multiple times on the surface of the column, effectively reducing the intensity of the sound waves and improving the sound insulation effect. It also helps to maintain the relative positional relationship between the first wave plate 100 and the second wave plate 200, making the entire board structure more stable and less prone to deformation or displacement due to external forces. At the same time, the regular shape also facilitates mass production and quality control.

[0026] The sound-absorbing and insulating column 300 adopts a multi-layered structure design from the outside to the inside. It can be understood that different materials have different absorption characteristics for sound waves of different frequencies. The sound-absorbing felt layer mainly has a good absorption and blocking effect on mid-to-high frequency sound waves; the glass wool layer has good mid-to-low frequency sound absorption performance, effectively absorbing and dissipating the energy of mid-to-low frequency sound waves; the polyester fiber layer has a certain absorption effect on low-frequency sound waves. Through this layered design, effective absorption of sound waves over a wider frequency range can be achieved, improving the overall sound insulation performance. The density of each layer is differentiated: the density of the sound-absorbing felt layer is greater than that of the glass wool layer, and the density of the glass wool layer is greater than that of the polyester fiber layer. When sound waves propagate from the outside to the inside, they encounter material layers with gradually changing densities, resulting in reflection and refraction at the interfaces. This density difference causes the sound waves to continuously reflect and refract between different layers, increasing the number of interactions between the sound waves and the materials, further improving the sound insulation effect. Preferably, after assembly, both ends of the sound-absorbing and insulating column 300 abut against the sealing cap.

[0027] The sealing connection between the two connecting portions 220 of the first wave plate 100 and the second wave plate 200 can be fixed by means of screws, snaps, adhesive bonding, etc. In a specific implementation, such as... Figure 2 , Figure 3The first corrugated plate 100 has a locking protrusion 221 on its connecting part, and the second corrugated plate 200 has a locking groove 222 at the corresponding position on its connecting part. The locking protrusion 221 and the locking groove 222 are interference-fitted. This interference fit ensures that the locking protrusion 221 is tightly embedded in the locking groove 222, enhancing the friction and mechanical interlocking force between the first corrugated plate 100 and the second corrugated plate 200. This allows it to withstand greater vibration, impact, and other external forces, effectively preventing separation or misalignment of the two corrugated plates during use, and ensuring the integrity and stability of the entire PET corrugated sheet structure. When sound waves propagate to the connecting part of the two corrugated plates, the interference fit also prevents leakage caused by the connection gap, reducing the sound transmission path and significantly improving the sound insulation effect of the sheet. The interference fit design of the locking protrusion 221 and the locking groove 222 makes the installation process relatively simple and quick. Simply align the locking protrusion 221 with the locking groove 222 and apply a certain amount of pressure to ensure a tight fit, completing the connection without the need for additional connectors or complex installation tools. This not only improves installation efficiency and reduces installation costs, but also facilitates subsequent disassembly and maintenance.

[0028] like Figure 4 The sealing cap 400 is made of silicone rubber, and its opposite side walls are tightly fitted to the upper and lower ends of the inner walls of the two corrugated portions 210. In this way, the sealing cap 400 is embedded in the upper and lower ends of the first and second corrugated plates 200, forming a structure similar to a bottle stopper. The two opposite side walls of the sealing cap 400 are provided with locking posts 410, and the inner walls of the two corrugated portions 210, corresponding to the positions of the locking posts 410, are provided with locking holes 420 on the contact surfaces between the inner walls and the side walls of the sealing cap 400. The locking posts 410 engage with the locking holes 420.

[0029] Thus, during assembly, the sound-absorbing and insulating column 300 is first placed into the first corrugated plate 100. Then, the locking post 410 on one side wall of the sealing cover 400 is aligned and engaged with the locking hole 420 on the inner wall of the corrugated portion of the first corrugated plate 100. Next, the locking hole 420 on the inner wall of the connecting portion of the second corrugated plate 200 is aligned and engaged with the locking post 410 on the other side wall of the sealing cover 400. The locking groove 222 on the connecting portion of the second corrugated plate 200 engages with the locking protrusion 221 on the connecting portion of the first corrugated plate 100, completing the assembly. That is, the locking structure between the side wall of the sealing cover 400 and the connecting portion 220, and the locking structure between the connecting portions 220 of the first corrugated plate 100 and the second corrugated plate 200 together form a multi-positioning and fixing sealing structure, improving assembly stability and making the assembled plate less prone to loosening. It is understood that damping plates can be provided at the locking points to prevent gap leakage.

[0030] To enable the single-piece panel structure to form a standardized modular design, the panel structure is also equipped with auxiliary structures for connection, assembly, and positioning. In some embodiments, a protrusion 430 is provided on the outer surface of the sealing cap 400 connected to the upper ends of the first and second wave plates, and a groove (not shown in the figure) is provided on the outer surface of the sealing cap connected to the lower ends of the first and second wave plates. The protrusion 430 and the groove are matched in shape and size. It should be noted that this design allows for the connection and assembly of multiple panels. The protrusions 430 and grooves serve as guiding structures, helping operators quickly and accurately align adjacent panels. Simply aligning the protrusion 430 of one panel with the groove of another, and pushing or pressing, allows the two panels to be quickly and accurately connected, enabling simple continuous assembly, shortening assembly time, and improving assembly efficiency. In this structure, the tight fit between the protrusions 430 and grooves increases the connection area and friction between adjacent panels, thereby improving the assembly stability of adjacent panels. This, either independently or in conjunction with other measures to ensure the stability of multiple panel components, prevents loosening or displacement of the panels after assembly. The tight fit between the protrusions 430 and grooves also ensures that the propagation of sound waves between the panels is effectively blocked, improving the sound insulation effect of the entire sound insulation system.

[0031] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A PET corrugated sheet structure for enhanced sound insulation, characterized in that, The device includes a first wave plate and a second wave plate arranged opposite to each other. The first wave plate and the second wave plate each have a corresponding connecting part and a wave part on their opposite surfaces. The wave part is recessed in the direction away from the top surface of the connecting part to form a wave structure. The connecting parts of the first wave plate and the second wave plate are sealed and fixed to each other. After the connection, the two wave parts form multiple cavities. Sound-absorbing and sound-insulating columns are provided in the cavities. Several protrusions are provided on the inner wall of the cavities, facing and abutting against the sound-absorbing and sound-insulating columns. The upper and lower ends of the first wave plate and the second wave plate are fitted with detachable sealing caps.

2. The sound-insulating PET corrugated sheet structure according to claim 1, characterized in that, Both the first and second corrugated boards are PET and rubber composite boards.

3. The sound-insulating PET corrugated sheet structure according to claim 1, characterized in that, The surfaces of the first and second wave plates are provided with honeycomb holes.

4. The sound-insulating PET corrugated sheet structure according to claim 1, characterized in that, The sound-absorbing and insulating column comprises, from the outside to the inside, a sound-insulating felt layer, a glass wool layer, and a polyester fiber cotton layer. The density of the sound-insulating felt layer is greater than that of the glass wool layer, and the density of the glass wool layer is greater than that of the polyester fiber cotton layer.

5. The sound-insulating PET corrugated sheet structure according to claim 4, characterized in that, The two ends of the sound-absorbing and insulating column abut against the sealing cover.

6. The sound-insulating PET corrugated sheet structure according to claim 1, characterized in that, The first wave plate and the second wave plate are connected and sealed by snapping or gluing at the connecting part.

7. The sound-insulating PET corrugated sheet structure according to claim 6, characterized in that, The sealing cap fits tightly against the inner walls of the two corrugated sections on opposite side walls.

8. The sound-insulating PET corrugated sheet structure according to claim 7, characterized in that, The sealing cap has two opposite sidewalls with locking posts, and the inner walls of the two corrugated parts have locking holes corresponding to the positions of the locking posts on the contact surfaces with the sidewalls of the sealing cap. The locking posts are engaged with the locking holes.

9. The sound-insulating PET corrugated sheet structure according to claim 8, characterized in that, The sealing cap connected to the upper ends of the first and second wave plates has a raised strip facing outwards, and the outer surface of the sealing cap connected to the lower ends of the first and second wave plates has a groove. The shape and size of the raised strip and the groove are matched with each other.

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