Flexible envelope surface noise reduction structure and manufacturing method thereof

Abstract

The invention discloses a flexible envelope surface noise reduction structure and a manufacturing method thereof. The flexible envelope surface noise reduction structure comprises a flexible resonance sound absorption structure and a flexible sound insulation plate. Wherein the flexible resonance sound absorption structure is manufactured through a flexible rubber 3D printing integrated forming process or a flexible rubber vulcanization integrated forming process, and the flexible resonance sound absorption structure sequentially comprises a plurality of resonance cavities, a flexible panel and a plurality of flexible vibration reduction blocks from bottom to top; the flexible sound insulation plate is attached to the multiple resonant cavities in a gluing mode. The manufacturing method specifically comprises the following steps: (1) designing performance size parameters; (2) processing and manufacturing a metal mold; (3) integrally forming and manufacturing a flexible resonance sound absorption structure; and (4) the flexible sound insulation board is attached, and the sound insulation board is obtained. The flexible enveloping surface noise reduction structure can be directly attached to the surface of sound source equipment to reduce noise transmission, and can also be used as a sound insulation cover and a sound insulation barrier under the condition that a large space is not occupied.

Description

Technical Field

[0001] The present invention relates to the technical field of noise control, and more particularly to a flexible envelope surface noise reduction structure and a manufacturing method thereof. Background Art

[0002] In industrial equipment noise control, sound absorption, sound insulation, and noise elimination technologies are usually used, including the installation of sound barriers, soundproof enclosures, soundproof rooms, and other technical means to control noise. However, in scenarios such as complex equipment systems, production lines, and special spaces, the design of noise control solutions often encounters various difficulties such as compact equipment layout, functional requirements for equipment operation, and limited installation space.

[0003] At present, the installation of control measures such as sound barriers, soundproof enclosures, and silencers usually requires a large amount of steel structure frame support and takes up a large space. The contradiction between this reality and the need for noise reduction often makes it impossible to effectively implement noise control measures and noise pollution cannot be effectively controlled.

[0004] Therefore, it is of great practical significance to reduce the spatial requirements of noise reduction technical measures and achieve effective noise reduction of high-noise equipment within a local space. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a flexible envelope surface noise reduction structure and a manufacturing method thereof to solve the deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A flexible envelope surface noise reduction structure, comprising a flexible resonant sound absorbing structure and a flexible sound insulation board;

[0008] The flexible resonant sound-absorbing structure is manufactured by a soft-glue 3D printing integrated molding process or a soft-glue vulcanization integrated molding process, and includes a plurality of resonant cavities, a flexible panel and a plurality of flexible vibration-absorbing blocks from bottom to top;

[0009] The flexible sound insulation board is bonded to a plurality of resonance cavities by gluing.

[0010] Furthermore, the material of the flexible resonant sound absorbing structure and the flexible sound insulation board is at least one of rubber, silicone and polyurethane.

[0011] A further beneficial effect of the above is that the material selected by the present invention has good softness and deformability, and is easy to adhere to the surface of irregular objects.

[0012] Furthermore, the thickness of the flexible sound insulation board is 2-4 mm.

[0013] Furthermore, the plurality of resonance cavities are regularly and evenly arranged, and a flexible partition plate with a thickness of 2 to 4 mm is arranged between every two resonance cavities.

[0014] A further beneficial effect of the above method is that the flexible partition plate has good sound insulation performance and can separate each cavity to prevent crosstalk.

[0015] Furthermore, the thickness of the flexible panel is 2-4 mm, and a plurality of through holes corresponding to the middle positions of the resonance cavity are regularly arranged.

[0016] A further beneficial effect of adopting the above is that the through holes on the flexible panel are used to allow sound waves to enter the resonance cavity from the outside.

[0017] Furthermore, the above-mentioned plurality of flexible vibration-damping blocks are regularly and evenly arranged, and the upper surface of each flexible vibration-damping block is provided with adhesive backing.

[0018] A further beneficial effect of adopting the above method is that the adhesive on the flexible vibration-damping block is used to bond and connect the flexible envelope surface noise reduction structure to the surface of the sound source device.

[0019] A method for manufacturing the above-mentioned flexible envelope surface noise reduction structure adopts a 3D printing integrated molding process, and specifically comprises the following steps:

[0020] (1) Design the performance and size parameters of the flexible envelope noise reduction structure based on the frequency characteristics of the noise source;

[0021] (2) Based on the performance and size parameters of the flexible envelope surface noise reduction structure, a 3D printing model for one-piece molding of the flexible resonant sound absorption structure is established;

[0022] (3) melting at least one of rubber, silicone and polyurethane at high temperature and placing it in a 3D printer, and forming a flexible resonant sound absorbing structure through an integrated 3D printing model;

[0023] (4) The flexible sound insulation board is bonded to the flexible resonant sound absorbing structure by gluing to obtain the flexible envelope surface noise reduction structure.

[0024] A method for manufacturing the above-mentioned flexible envelope surface noise reduction structure adopts a soft rubber vulcanization integrated molding process, and specifically comprises the following steps:

[0025] (1) Design the performance and size parameters of the flexible envelope noise reduction structure based on the frequency characteristics of the noise source;

[0026] (2) Based on the performance and size parameters of the flexible envelope surface noise reduction structure, a metal mold for integrally molding the flexible resonance sound absorption structure is manufactured;

[0027] (3) Laying at least one of rubber, silicone and polyurethane in a metal mold, melting at high temperature, cooling, and integrally forming to produce a flexible resonant sound absorbing structure;

[0028] (4) The flexible sound insulation board is bonded to the flexible resonant sound absorbing structure by gluing to obtain a flexible envelope surface noise reduction structure.

[0029] It can be seen from the above technical solution that compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] The flexible envelope surface noise reduction structure of the present invention can be directly attached to the surface of a sound source device to reduce noise propagation, and can also be used as a soundproof cover or a soundproof barrier without occupying a large space. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0032] Figure 1 A three-dimensional diagram of the flexible envelope surface noise reduction structure provided by the present invention;

[0033] Figure 2 A front view of the flexible envelope surface noise reduction structure provided by the present invention;

[0034] Figure 3 A top view of the flexible envelope surface noise reduction structure provided by the present invention;

[0035] Figure 4 This is a physical picture of the flexible envelope surface noise reduction structure of Example 1;

[0036] Figure 5 This is a physical picture of the reverberation chamber experimental test using the flexible envelope surface noise reduction structure of Example 1;

[0037] Figure 6 This is the frequency curve of the sound absorption coefficient of the flexible envelope surface noise reduction structure in Example 1.

[0038] Figure 1-3 In the figure, 1-flexible sound insulation board, 2-resonance cavity, 3-flexible panel, 4-flexible vibration reduction block, 5-through hole. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] Example 1

[0045] Flexible envelope surface noise reduction structure, such as Figure 1-3As shown, it includes a flexible resonant sound absorbing structure and a flexible sound insulation board 1, which is made of silica gel;

[0046] The flexible resonant sound-absorbing structure is made by a soft-glue 3D printing integrated molding process, and includes a plurality of resonant cavities 2, a flexible panel 3 and a plurality of flexible vibration-damping blocks 4 from bottom to top;

[0047] The thickness of the flexible sound insulation board 1 is 3 mm, and it is bonded to the plurality of resonance cavities 2 by gluing;

[0048] A plurality of resonance cavities 2 are regularly and evenly arranged, and a flexible partition plate with a thickness of 2 mm is arranged between every two resonance cavities 2;

[0049] The thickness of the flexible panel 3 is 3 mm, and a number of through holes 5 corresponding to the middle positions of the resonance cavity 2 are regularly arranged;

[0050] A plurality of flexible vibration-damping blocks 4 are regularly and evenly arranged, and the upper surface of each flexible vibration-damping block 4 is provided with adhesive backing;

[0051] The manufacturing method of the above-mentioned flexible envelope surface noise reduction structure specifically comprises the following steps:

[0052] (1) Design the performance and size parameters of the flexible envelope noise reduction structure based on the frequency characteristics of the noise source;

[0053] (2) Based on the performance and size parameters of the flexible envelope surface noise reduction structure, a 3D printing model for one-piece molding of the flexible resonant sound absorption structure is established;

[0054] (3) The silicone is melted at high temperature and placed in a 3D printer, and a flexible resonant sound-absorbing structure is produced by integrally molding the 3D printing model;

[0055] (4) The flexible sound insulation board 1 is bonded to the flexible resonant sound absorbing structure by gluing to obtain a flexible envelope surface noise reduction structure.

[0056] Example 2

[0057] Flexible envelope surface noise reduction structure, such as Figure 1-3 As shown, it includes a flexible resonant sound absorbing structure and a flexible sound insulation board 1, which is made of silica gel;

[0058] The flexible resonant sound-absorbing structure is manufactured by a soft rubber vulcanization integrated molding process, and includes a plurality of resonant cavities 2, a flexible panel 3 and a plurality of flexible vibration-damping blocks 4 from bottom to top;

[0059] The thickness of the flexible sound insulation board 1 is 2 mm, and it is bonded to the plurality of resonance cavities 2 by gluing;

[0060] A plurality of resonance cavities 2 are regularly and evenly arranged, and a flexible partition plate with a thickness of 3 mm is arranged between every two resonance cavities 2;

[0061] The thickness of the flexible panel 3 is 2 mm, and a number of through holes 5 corresponding to the middle positions of the resonance cavity 2 are regularly arranged;

[0062] A plurality of flexible vibration-damping blocks 4 are regularly and evenly arranged, and the upper surface of each flexible vibration-damping block 4 is provided with adhesive backing;

[0063] The manufacturing method of the above-mentioned flexible envelope surface noise reduction structure specifically comprises the following steps:

[0064] (1) Design the performance and size parameters of the flexible envelope noise reduction structure based on the frequency characteristics of the noise source;

[0065] (2) Based on the performance and size parameters of the flexible envelope surface noise reduction structure, a metal mold for integrally molding the flexible resonance sound absorption structure is manufactured;

[0066] (3) Laying the silicone in a metal mold, melting it at high temperature, cooling it, and forming it into a one-piece structure to produce a flexible resonant sound-absorbing structure;

[0067] (4) The flexible sound insulation board 1 is bonded to the flexible resonant sound absorbing structure by gluing to obtain a flexible envelope surface noise reduction structure.

[0068] Example 3

[0069] Flexible envelope surface noise reduction structure, such as Figure 1-3 As shown, it includes a flexible resonant sound absorbing structure and a flexible sound insulation board 1, which is made of polyurethane;

[0070] The flexible resonant sound-absorbing structure is manufactured by a soft rubber vulcanization integrated molding process, and includes a plurality of resonant cavities 2, a flexible panel 3 and a plurality of flexible vibration-damping blocks 4 from bottom to top;

[0071] The thickness of the flexible sound insulation board 1 is 4 mm, and it is bonded to the plurality of resonance cavities 2 by gluing;

[0072] A plurality of resonance cavities 2 are regularly and evenly arranged, and a flexible partition plate with a thickness of 4 mm is arranged between every two resonance cavities 2;

[0073] The thickness of the flexible panel 3 is 4 mm, and a number of through holes 5 corresponding to the middle positions of the resonance cavity 2 are regularly arranged;

[0074] A plurality of flexible vibration-damping blocks 4 are regularly and evenly arranged, and the upper surface of each flexible vibration-damping block 4 is provided with adhesive backing;

[0075] The manufacturing method of the above-mentioned flexible envelope surface noise reduction structure specifically comprises the following steps:

[0076] (1) Design the performance and size parameters of the flexible envelope noise reduction structure based on the frequency characteristics of the noise source;

[0077] (2) Based on the performance and size parameters of the flexible envelope surface noise reduction structure, a metal mold for integrally molding the flexible resonance sound absorption structure is manufactured;

[0078] (3) Spreading polyurethane in a metal mold, melting it at high temperature, cooling it, and forming it into a single piece to make a flexible resonant sound-absorbing structure;

[0079] (4) The flexible sound insulation board 1 is bonded to the flexible resonant sound absorbing structure by gluing to obtain a flexible envelope surface noise reduction structure.

[0080] Performance Testing

[0081] Take the flexible envelope surface noise reduction structure prepared in Example 1 (such as Figure 4 As shown), the thickness of the flexible sound insulation board 1 is 3 mm, the length and width of the resonance cavity 2 are both 22 mm, and the height is 16 mm, the thickness of the flexible panel 3 is 3 mm, and the diameter of the through hole 5 is 1.5 mm. The following sound absorption performance test is performed:

[0082] 1) According to the Helmholtz resonance formula, the design resonance frequency is about 400Hz, and the sound absorption performance should reach the highest peak at 400Hz.

[0083] 2) Lay a flexible envelope surface noise reduction structure on the floor of the reverberation room, install a dodecahedron sound source, and conduct reverberation room experimental tests (such as Figure 5 as shown).

[0084] 3) Process the data results to obtain the sound absorption coefficient frequency curve (such as Figure 6 as shown).

[0085] Depend on Figure 6 It can be seen that the sound absorption coefficient of the resonance frequency of 400 Hz is 0.8. Therefore, for the noise with a main frequency of 400 Hz, the flexible envelope surface noise reduction structure of Example 1 can effectively absorb and reduce noise.

[0086] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flexible envelope surface noise reduction structure, characterized in that: It includes a flexible resonant sound absorbing structure and a flexible sound insulation board; The flexible resonant sound-absorbing structure is manufactured by a soft-glue 3D printing integrated molding process or a soft-glue vulcanization integrated molding process, and includes, from bottom to top, a plurality of resonant cavities, a flexible panel, and a plurality of flexible vibration-absorbing blocks; The flexible sound insulation board is bonded to the plurality of resonance cavities by gluing.

2. A flexible envelope surface noise reduction structure according to claim 1, characterized in that: The flexible resonance sound absorbing structure and the flexible sound insulation board are made of at least one of rubber, silicone and polyurethane.

3. The flexible envelope surface noise reduction structure according to claim 1, characterized in that: The thickness of the flexible sound insulation board is 2-4 mm.

4. The flexible envelope surface noise reduction structure according to claim 1, characterized in that: The plurality of resonance cavities are regularly and evenly arranged, and a flexible partition plate with a thickness of 2 to 4 mm is arranged between every two of the resonance cavities.

5. The flexible envelope surface noise reduction structure according to claim 1, characterized in that: The thickness of the flexible panel is 2-4 mm, and a plurality of through holes corresponding to the middle positions of the resonance cavity are regularly arranged.

6. The flexible envelope surface noise reduction structure according to claim 1, characterized in that: The plurality of flexible vibration-damping blocks are regularly and evenly arranged, and the upper surface of each flexible vibration-damping block is provided with a backing adhesive.

7. A method for manufacturing the flexible envelope surface noise reduction structure as claimed in claim 1, characterized in that: The 3D printing one-piece molding process is adopted, which specifically includes the following steps: (1) Design the performance and size parameters of the flexible envelope noise reduction structure based on the frequency characteristics of the noise source; (2) Based on the performance and size parameters of the flexible envelope surface noise reduction structure, a 3D printing model for one-piece molding of the flexible resonant sound absorption structure is established; (3) melting at least one of rubber, silicone and polyurethane at high temperature and placing it in a 3D printer, and forming a flexible resonant sound absorbing structure through an integrated 3D printing model; (4) The flexible sound insulation board is bonded to the flexible resonant sound absorbing structure by gluing to obtain the flexible envelope surface noise reduction structure.

8. A method for manufacturing the flexible envelope surface noise reduction structure as claimed in claim 1, characterized in that: The soft rubber vulcanization one-piece molding process is adopted, which specifically includes the following steps: (1) Design the performance and size parameters of the flexible envelope noise reduction structure based on the frequency characteristics of the noise source; (2) Based on the performance and size parameters of the flexible envelope surface noise reduction structure, a metal mold for integrally molding the flexible resonance sound absorption structure is manufactured; (3) Laying at least one of rubber, silicone and polyurethane in a metal mold, melting at high temperature, cooling, and integrally forming to produce a flexible resonant sound absorbing structure; (4) The flexible sound insulation board is bonded to the flexible resonant sound absorbing structure by gluing to obtain the flexible envelope surface noise reduction structure.

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