High-efficiency sound-insulation vibration-control film
By designing a sound-absorbing layer and an vibration-making layer integrating a multi-frequency vibration-making structure in the sound-absorbing film, the problem that sound-absorbing film in the prior art is difficult to cover and effectively suppress various vibrations and noise sources, and a better sound-absorbing effect is achieved.
Patent Information
- Application Number
- CN202421785572.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-26
AI Technical Summary
Existing sound insulation vibration-making films are difficult to cover and effectively suppress various vibration and noise sources, resulting in unsatisfactory sound insulation vibration-making effect.
A high-efficiency sound insulation vibration-making film is designed, including a sound absorbing layer, a vibration-making layer and an adhesive layer. The sound absorbing layer absorbs noise through the cavity groove and sound absorbing channel structure, and the vibration-making layer absorbs vibrations at different frequencies by integrating high-frequency, medium-frequency and low-frequency vibration-making structures.
Effectively absorb and consume various noise sources to reduce noise propagation; absorb vibrations at different frequencies, cover a wide range of frequency, and improve the overall sound insulation and vibration control effect.
Smart Images
Figure CN222975103U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile parts, in particular to an efficient sound insulation and vibration damping film. Background Art
[0002] With the development of the automobile industry and the improvement of consumers' requirements for automobile comfort, automobile sound insulation technology has received extensive attention. As an important part of the automobile sound insulation system, the main function of the sound insulation and vibration damping film is to reduce the generation and transmission of noise by absorbing and dissipating vibration energy. However, traditional sound insulation and vibration damping films are mostly composed of single-layer or multi-layer composite materials, but the structures of each layer of materials often adopt relatively simple and unified structural designs, which can only have good vibration absorption effects within certain specific frequency ranges, and have poor effects in other frequency ranges, resulting in difficulty for the sound insulation and vibration damping film to cover and effectively suppress various vibration and noise sources, thus leading to an unsatisfactory overall sound insulation and vibration damping effect. Therefore, it is necessary to improve the existing technology to solve the above problems. Summary of the Utility Model
[0003] The purpose of the utility model is to provide an efficient sound insulation and vibration damping film, aiming to solve the problem that the existing sound insulation and vibration damping film is difficult to cover and effectively suppress various vibration and noise sources.
[0004] To achieve the above purpose, the utility model provides an efficient sound insulation and vibration damping film, which includes a sound absorption layer, a vibration damping layer and an adhesive layer; the sound absorption layer is arranged on the upper surface of the vibration damping layer, and the adhesive layer is bonded to the lower surface of the vibration damping layer; the vibration damping layer includes a butyl rubber layer and an aluminum sheet layer, and the aluminum sheet layer is configured as a plurality of combined vibration damping structures arranged at equal intervals; the combined vibration damping structure includes a high-frequency vibration damping structure, a medium-frequency vibration damping structure and a low-frequency vibration damping structure arranged at equal intervals in sequence; the high-frequency vibration damping structure is a regular hexagon; there are two medium-frequency vibration damping structures and they are parallelograms arranged symmetrically front and back; there are two low-frequency vibration damping structures and they are equilateral triangles arranged symmetrically front and back;
[0005] The width of the high-frequency vibration damping structure is W1, the width of the medium-frequency vibration damping structure is W2, and the width of the low-frequency vibration damping structure is W3, and W1>W2 = W3;
[0006] The area of the high-frequency vibration damping structure is S1, the area of the medium-frequency vibration damping structure is S2, and the area of the low-frequency vibration damping structure is S3, and S1>S2>S3.
[0007] Further, the orientation of the low-frequency vibration damping structure at the front end is positive, and the orientation of the low-frequency vibration damping structure at the rear end is negative; one pair of opposite sides of the high-frequency vibration damping structure is parallel to one pair of opposite sides of the two intermediate-frequency vibration damping structures and the bottom side of the low-frequency vibration damping structure; the second pair of opposite sides of the high-frequency vibration damping structure is parallel to the other pair of opposite sides of the intermediate-frequency vibration damping structure at the front end and one of the waist sides of the low-frequency vibration damping structure; the third pair of opposite sides of the high-frequency vibration damping structure is parallel to the other pair of opposite sides of the intermediate-frequency vibration damping structure at the rear end and the other waist side of the low-frequency vibration damping structure.
[0008] Further, the sound-absorbing layer includes a first sound-absorbing layer and a second sound-absorbing layer; the first sound-absorbing layer is provided with cavity grooves and sound-absorbing channels, and the sound-absorbing channels penetrate through the cavity grooves and the upper surface of the first sound-absorbing layer; the upper surface of the second sound-absorbing layer is provided with a concavo-convex structure, and a first sound-damping cavity is formed between the second sound-absorbing layer and the cavity grooves; the second sound-absorbing layer is provided with a plurality of sound-damping structures recessed downward from the upper surface of the second sound-absorbing layer.
[0009] Further, the sound-absorbing channels are in an expanding shape with a smaller upper part and a larger lower part.
[0010] Further, the sound-damping structure includes a sound-receiving channel, a sound-damping channel, and a second sound-damping cavity connected in sequence; the sound-receiving channel is in a constricted shape with a larger upper part and a smaller lower part, and the connection part between the second sound-damping cavity and the sound-damping channel is in an expanding shape with a smaller upper part and a larger lower part.
[0011] Further, the inner side walls of the sound-damping channel and the second sound-damping cavity are both provided with concavo-convex structures.
[0012] Further, the cross-section of the concavo-convex structure is in the shape of an eggshell or a triangle.
[0013] Further, the first sound-absorbing layer is made of polyurethane elastomer; the second sound-absorbing layer is made of sound-absorbing cotton; and the bonding layer is made of epoxy resin.
[0014] Further, the thickness of the first sound-absorbing layer is 2 - 4 mm; the thickness of the second sound-absorbing layer is 4 - 12 mm; the thickness of the vibration damping layer is 1 - 3 mm; and the thickness of the bonding layer is 0.5 - 1 mm.
[0015] Further, the thickness of the first sound-absorbing layer is 3 mm; the thickness of the second sound-absorbing layer is 8 mm; the thickness of the vibration damping layer is 2 mm; and the thickness of the bonding layer is 0.5 mm.
[0016] Compared with the prior art, the high-efficiency sound-insulating and vibration-damping film provided by the present utility model can effectively absorb and consume various noise sources through the sound-absorbing layer, reducing the transmission of noise; and the vibration damping layer can absorb vibrations of different frequencies by integrating high-frequency, intermediate-frequency, and low-frequency vibration damping structures, effectively covering and suppressing vibrations in a wide frequency range from low frequency to high frequency, preventing vibrations from being converted into noise or further transmitted, thereby improving the overall sound-insulating and vibration-damping effect. Brief Description of the Drawings
[0017] Figure 1 is a schematic structural view of the present utility model;
[0018] Figure 2 is a schematic structural view of the aluminum sheet layer;
[0019] Figure 3 is a schematic structural view of the combined vibration damping structure;
[0020] Figure 4 is a schematic structural view of the sound absorption structure.
[0021] Description of the Reference Numerals in the Drawings:
[0022] 1, sound absorption layer; 11, first sound absorption layer; 111, cavity groove; 112, sound absorption channel; 113, first sound absorption cavity; 12, second sound absorption layer; 121, concave-convex structure; 122, sound absorption structure; 1221, sound receiving channel; 1222, sound absorption channel; 1223, second sound absorption cavity;
[0023] 2, vibration damping layer; 21, butyl rubber layer; 22, aluminum sheet layer; 23, combined vibration damping structure; 231, high-frequency vibration damping structure; 2311, first pair of opposite sides; 2312, second pair of opposite sides; 2313, third pair of opposite sides; 232, medium-frequency vibration damping structure; 233, low-frequency vibration damping structure; 2331, bottom edge; 2332, waist edge;
[0024] 3, adhesive layer. Detailed Description of the Preferred Embodiments
[0025] The present utility model will be described in detail below in conjunction with specific embodiments.
[0026] In the present utility model, unless otherwise clearly defined and limited, when terms such as "disposed on", "connected to", and "connected" appear, these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or connected through one or more intermediate media. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. For the directional terms in the present utility model, they are used to better illustrate the characteristics of the features and the relationships between the features. It should be understood that when the placement direction of the present utility model changes, the directions of the characteristics of the features and the relationships between the features also change accordingly. Therefore, the directional terms do not constitute an absolute limitation on the characteristics of the features and the relationships between the features in space, but only play a relative limiting role.
[0027] The present utility model provides an efficient sound insulation and vibration damping film, as Figures 1 to 4As shown in the figure, it includes a sound-absorbing layer 1, a vibration-damping layer 2, and an adhesive layer 3; the sound-absorbing layer 1 is disposed on the upper surface of the vibration-damping layer 2, and the adhesive layer 3 is adhered to the lower surface of the vibration-damping layer 2; the vibration-damping layer 2 includes a butyl rubber layer 21 and an aluminum sheet layer 22, and the aluminum sheet layer 22 is configured as a plurality of combined vibration-damping structures 23 arranged at equal intervals; the combined vibration-damping structure 23 includes a high-frequency vibration-damping structure 231, a medium-frequency vibration-damping structure 232, and a low-frequency vibration-damping structure 233 arranged at equal intervals in sequence; the high-frequency vibration-damping structure 231 is a regular hexagon; there are two medium-frequency vibration-damping structures 232 and they are parallelograms symmetrically arranged front and back; there are two low-frequency vibration-damping structures 233 and they are equilateral triangles symmetrically arranged front and back;
[0028] The width of the high-frequency vibration-damping structure 231 is W1, the width of the medium-frequency vibration-damping structure 232 is W2, and the width of the low-frequency vibration-damping structure 233 is W3, and W1>W2 = W3;
[0029] The area of the high-frequency vibration-damping structure 231 is S1, the area of the medium-frequency vibration-damping structure 232 is S2, and the area of the low-frequency vibration-damping structure 233 is S3, and S1>S2>S3.
[0030] Based on the above structural design, the sound-absorbing layer 1 can effectively absorb and consume noise and reduce the propagation of noise; and the vibration-damping layer 2 can absorb vibrations of different frequencies through integrating the high-frequency vibration-damping structure 231, the medium-frequency vibration-damping structure 232, and the low-frequency vibration-damping structure 233, effectively cover and suppress vibrations in a wide frequency range from low frequency to high frequency, prevent vibrations from being converted into noise or further propagated, and improve the overall sound insulation and vibration-damping effect.
[0031] In this embodiment, the orientation of the low-frequency vibration-damping structure 233 at the front end is forward, and the orientation of the low-frequency vibration-damping structure 233 at the rear end is backward; the first pair of sides 2311 of the high-frequency vibration-damping structure 231 is parallel to one pair of sides of the two medium-frequency vibration-damping structures 232 and the bottom side 2331 of the low-frequency vibration-damping structure 233; the second pair of sides 2312 of the high-frequency vibration-damping structure 231 is parallel to the other pair of sides of the medium-frequency vibration-damping structure 232 at the front end and one of the waist sides 2332 of the low-frequency vibration-damping structure 233; the third pair of sides 2313 of the high-frequency vibration-damping structure 231 is parallel to the other pair of sides of the medium-frequency vibration-damping structure 232 at the rear end and the other waist side 2332 of the low-frequency vibration-damping structure 233.
[0032] In this embodiment, the sound-absorbing layer 1 includes a first sound-absorbing layer 11 and a second sound-absorbing layer 12; the first sound-absorbing layer 11 is provided with a cavity groove 111 and a sound-absorbing channel 112, and the sound-absorbing channel 112 penetrates through the cavity groove 111 and the upper surface of the first sound-absorbing layer 11; the upper surface of the second sound-absorbing layer 12 is provided with a concavo-convex structure 121, and a first sound-damping cavity 113 is formed between the second sound-absorbing layer 12 and the cavity groove 111; the second sound-absorbing layer 12 is provided with a plurality of sound-damping structures 122 that are recessed downward from the upper surface of the second sound-absorbing layer 12. Through the concavo-convex structure 121 on the surface of the second sound-absorbing layer 12 and the first sound-damping cavity 113, the noise is subjected to the first sound-damping treatment in the first sound-damping cavity 113, and the noise is reflected and scattered multiple times; part of the noise can further penetrate into the sound-damping structure 122 for multiple sound-damping treatments, effectively reducing the propagation energy of the noise and greatly improving the overall sound-damping efficiency.
[0033] In this embodiment, the sound-absorbing channel 112 is in an expanding shape with a smaller upper part and a larger lower part. When the noise enters the expanding sound-absorbing channel 112 and comes to the first sound-damping cavity 113, due to the change in the cross-sectional area of the channel, the energy of the noise will be effectively converted into heat energy or other forms of energy, reducing the energy of the noise.
[0034] In this embodiment, the sound-damping structure 122 includes a sound-receiving channel 1221, a sound-damping channel 1222, and a second sound-damping cavity 1223 that are connected in sequence; the sound-receiving channel 1221 is in a constricted shape with a larger upper part and a smaller lower part, which can guide the noise into the sound-damping channel 1222; the connection between the second sound-damping cavity 1223 and the sound-damping channel 1222 is in an expanding shape with a smaller upper part and a larger lower part. When the noise enters the second sound-damping cavity 1223 from the sound-damping channel 1222, due to the change in the cross-sectional area of the channel, the energy of the noise will be effectively converted into heat energy or other forms of energy, reducing the energy of the noise and achieving the purpose of sound damping.
[0035] In this embodiment, the inner side walls of the sound-damping channel 1222 and the second sound-damping cavity 1223 are both provided with concavo-convex structures 121, increasing the number of reflections and scatterings of the noise in the sound-damping channel 1222 and the second sound-damping cavity 1223, so that the noise is subjected to the second sound-damping treatment in the sound-damping channel 1222 and then enters the second sound-damping cavity 1223 for the third sound-damping treatment. The noise gradually loses energy during multiple collisions, thereby enhancing the sound-damping effect.
[0036] In this embodiment, the cross-section of the concavo-convex structure 121 is in the shape of an eggshell or a triangle. Both the eggshell shape and the triangle shape can increase the contact area between the noise and the material, causing the noise to be reflected and scattered multiple times and consuming the energy of the noise.
[0037] In this embodiment, the first sound-absorbing layer 11 is made of polyurethane elastomer, which can absorb and dissipate noise; the second sound-absorbing layer 12 is made of sound-absorbing cotton, which can further reduce the propagation of noise; the adhesive layer 3 is made of epoxy resin, which can achieve excellent adhesion and durability.
[0038] In this embodiment, the thickness of the first sound-absorbing layer 11 is 2 - 4 mm, preferably 3 mm; the thickness of the second sound-absorbing layer 12 is 4 - 12 mm, preferably 8 mm; the thickness of the vibration damping layer 2 is 1 - 3 mm, preferably 2 mm; the thickness of the adhesive layer 3 is 0.5 - 1 mm, preferably 0.5 mm. The thickness of each of the above structural layers is the best choice after considering both production cost and usage effect.
[0039] In summary, this highly efficient sound-insulating and vibration-damping film can solve the problem in the prior art that it is difficult for sound-insulating and vibration-damping films to cover and effectively suppress various vibration and noise sources.
[0040] Without conflict, the above embodiments and the features in the embodiments can be combined with each other.
[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.
Claims
1. A highly efficient sound-insulating and vibration-damping film, characterized in that: The invention comprises a sound absorbing layer (1), a vibration damping layer (2) and an adhesive layer (3); the sound absorbing layer (1) is arranged on the upper surface of the vibration damping layer (2), and the adhesive layer (3) is bonded to the lower surface of the vibration damping layer (2); the vibration damping layer (2) comprises a butyl rubber layer (21) and an aluminum sheet layer (22), and the aluminum sheet layer (22) is configured into a plurality of combined vibration damping structures (23) arranged at equal distances; The combined vibration damping structure (23) comprises a high-frequency vibration damping structure (231), a medium-frequency vibration damping structure (232) and a low-frequency vibration damping structure (233) which are arranged in sequence and at equal intervals; the high-frequency vibration damping structure (231) is a regular hexagon; The intermediate frequency vibration damping structure (232) is provided with two parallelograms which are symmetrically arranged front and back; the low frequency vibration damping structure (233) is provided with two regular triangles which are symmetrically arranged front and back; The width of the high-frequency vibration damping structure (231) is W1, the width of the medium-frequency vibration damping structure (232) is W2, the width of the low-frequency vibration damping structure (233) is W3, and W1>W2=W3; The area of the high-frequency vibration damping structure (231) is S1, the area of the medium-frequency vibration damping structure (232) is S2, the area of the low-frequency vibration damping structure (233) is S3, and S1>S2>S3.
2. The high-efficiency sound-insulating and vibration-damping film according to claim 1 is characterized in that: The low-frequency vibration damping structure (233) located at the front end is oriented in a forward direction, and the low-frequency vibration damping structure (233) located at the rear end is oriented in a reverse direction; the first group of opposite sides (2311) of the high-frequency vibration damping structure (231) is parallel to one group of opposite sides of the two intermediate-frequency vibration damping structures (232) and the bottom side (2331) of the low-frequency vibration damping structure (233); the second group of opposite sides (2312) of the high-frequency vibration damping structure (231) is parallel to another group of opposite sides of the intermediate-frequency vibration damping structure (232) located at the front end and one waist side (2332) of the low-frequency vibration damping structure (233); and the third group of opposite sides (2313) of the high-frequency vibration damping structure (231) is parallel to another group of opposite sides of the intermediate-frequency vibration damping structure (232) located at the rear end and another waist side (2332) of the low-frequency vibration damping structure (233).
3. The high-efficiency sound-insulating and vibration-damping film according to claim 1 is characterized in that: The sound absorbing layer (1) comprises a first sound absorbing layer (11) and a second sound absorbing layer (12); the first sound absorbing layer (11) is provided with a cavity groove (111) and a sound absorbing channel (112), and the sound absorbing channel (112) runs through the cavity groove (111) and the upper surface of the first sound absorbing layer (11); the upper surface of the second sound absorbing layer (12) is provided with a concave-convex structure (121), and the second sound absorbing layer (12) and the cavity groove (111) form a first sound-absorbing cavity (113); the second sound absorbing layer (12) is provided with a plurality of sound-absorbing structures (122) that are recessed downward from the upper surface of the second sound absorbing layer (12).
4. The high-efficiency sound-insulating and vibration-damping film according to claim 3 is characterized in that: The sound absorbing channel (112) is in an expansion shape that is smaller at the top and larger at the bottom.
5. The high-efficiency sound-insulating and vibration-damping film according to claim 3 is characterized in that: The sound-absorbing structure (122) comprises a sound-absorbing channel (1221), a sound-absorbing channel (1222) and a second sound-absorbing cavity (1223) which are connected in sequence; the sound-absorbing channel (1221) is in a contracted shape with a larger top and a smaller bottom, and the connection between the second sound-absorbing cavity (1223) and the sound-absorbing channel (1222) is in an expanded shape with a smaller top and a larger bottom.
6. The high-efficiency sound-insulating and vibration-damping film according to claim 5 is characterized in that: The inner side walls of the silencing channel (1222) and the second silencing cavity (1223) are both provided with a concave-convex structure (121).
7. The high-efficiency sound-insulating and vibration-damping film according to claim 6 is characterized in that: The cross section of the concavo-convex structure (121) is eggshell-shaped or triangular-shaped.
8. The high-efficiency sound-insulating and vibration-damping film according to claim 1 is characterized in that: The first sound-absorbing layer (11) is made of polyurethane elastomer; the second sound-absorbing layer (12) is made of sound-absorbing cotton; and the bonding layer (3) is made of epoxy resin.
9. The high-efficiency sound-insulating and vibration-damping film according to claim 1 is characterized in that: The thickness of the first sound absorbing layer (11) is 2 to 4 mm; the thickness of the second sound absorbing layer (12) is 4 to 12 mm; the thickness of the vibration damping layer (2) is 1 to 3 mm; and the thickness of the adhesive layer (3) is 0.5 to 1 mm.
10. The high-efficiency sound-insulating and vibration-damping film according to claim 9, characterized in that: The thickness of the first sound absorbing layer (11) is 3 mm; the thickness of the second sound absorbing layer (12) is 8 mm; the thickness of the vibration damping layer (2) is 2 mm; and the thickness of the adhesive layer (3) is 0.8 mm.