Honeycomb-structure polypropylene sound insulation shock pad

Abstract

The utility model discloses a polypropylene sound insulation shock pad with a honeycomb structure, which comprises a polypropylene honeycomb bearing layer, a damping resonance layer and an elastic buffer layer, the polypropylene honeycomb bearing layer is integrally formed by modified polypropylene through injection molding, and densely distributed honeycomb holes are formed in the polypropylene honeycomb bearing layer. Each honeycomb hole is a regular hexagon with the side length being 1-5 mm, the thickness of the hole wall of each honeycomb hole is 0.3-1 mm, cross-shaped reinforcing ribs are arranged in the honeycomb holes, and by means of the structure, the product can still keep stable sound insulation and shock absorption effects under the complex environments such as high temperature, high humidity and high vibration, and the application range is wide.

Description

Technical Field

[0001] This utility model relates to the field of shock-absorbing pad technology, and in particular to a honeycomb structure polypropylene sound insulation and shock-absorbing pad. Background Technology

[0002] Currently, traditional materials and structures have many limitations in the field of sound insulation and vibration reduction.

[0003] For example, a sound insulation and vibration damping pad disclosed on the Chinese Patent Network, with patent publication number "CN221824373U", mainly consists of a base with multiple evenly distributed vibration damping and buffering mechanisms installed inside. Each set of vibration damping and buffering mechanisms includes two fixed plates, each fixed plate being symmetrically fixedly installed at the bottom of the base. Fixed rods are fixedly installed on the middle of one side of each fixed plate in the same set, and movable blocks are symmetrically slidably installed on the outer periphery of each fixed rod. Connecting rods are rotatably installed at the top of each movable block. The beneficial effects are: the vibration damping layer and sound-absorbing layer inside the sound insulation pad can absorb vibrations generated at the connection point to a certain extent; simultaneously, the movable blocks in the vibration damping and buffering mechanism, in conjunction with the fixed rods, springs, connecting rods, and movable plates, can reduce the vibration generated by the base, reducing the possibility of noise generation, thereby achieving the purpose of noise isolation and preventing people from being affected by noise during the use of the sound insulation pad. However, the above device uses a large number of mechanical structures as the vibration damping body, making it difficult to use in environments with high space requirements. To solve the above problems, this utility model proposes a novel honeycomb structure polypropylene sound insulation and vibration damping pad. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a honeycomb structure polypropylene sound insulation and vibration damping pad.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A honeycomb structure polypropylene sound insulation and vibration damping pad includes a polypropylene honeycomb load-bearing layer, a damping resonance layer, and an elastic buffer layer. The polypropylene honeycomb load-bearing layer is integrally injection molded from modified polypropylene. The polypropylene honeycomb load-bearing layer has densely distributed honeycomb holes. Each honeycomb hole is a regular hexagon with a side length of 1-5 mm. The wall thickness of the honeycomb hole is 0.3-1 mm. Cross-shaped reinforcing ribs are provided inside the honeycomb holes.

[0007] Preferably, the upper surface of the polypropylene honeycomb load-bearing layer is coated with a silica aerogel coating, and the lower surface of the polypropylene honeycomb load-bearing layer is provided with densely distributed damping particles.

[0008] Preferably, the damping resonance layer is disposed at the lower end of the polypropylene honeycomb load-bearing layer, the damping resonance layer is made of polypropylene-based composite foam material, and the damping resonance layer has uniformly distributed closed air pores inside.

[0009] Preferably, a butyl rubber damping membrane is provided at the lower end of the damping resonance layer, and a polypropylene fusion layer of a certain thickness is provided between the damping resonance layer and the elastic buffer layer through a hot pressing process, wherein glass fibers are uniformly distributed in the polypropylene fusion layer.

[0010] Preferably, the elastic buffer layer is made of polypropylene / EPDM blended foam material, and the elastic buffer layer has a honeycomb-shaped groove with staggered arrangement of cells inside.

[0011] Preferably, the adjacent honeycomb pores of the polypropylene honeycomb load-bearing layer are staggered at 45°.

[0012] This utility model has the following beneficial effects:

[0013] 1. This utility model achieves highly efficient sound insulation and vibration reduction across a wide frequency range through the synergistic effect of its multi-layered structure. The silica aerogel coating preferentially reflects high-frequency sound waves, reducing noise incidence; the closed-cell structure of the damping resonance layer, combined with the butyl rubber damping membrane, effectively absorbs mid-to-high-frequency sound waves and dissipates vibration energy; the three-dimensional orthogonal honeycomb grid and staggered distribution design of the polypropylene honeycomb load-bearing layer forms a three-dimensional barrier against low-frequency sound waves and disperses concentrated vibrations, avoiding excessive local stress. The clear division of labor and mutual cooperation among the layers enable the sound insulation pad to exert excellent sound insulation and vibration reduction effects across the entire frequency range of 20Hz-20000Hz, significantly outperforming traditional single or simple composite sound insulation and vibration reduction materials.

[0014] 2. This sound insulation and vibration damping pad uses a full polypropylene-based material system. Through modification and blending processes, the functions of each layer are differentiated, resulting in good material compatibility. The polypropylene fusion layer, formed using a hot-pressing process, incorporates internal glass fibers, greatly enhancing interlayer bonding and effectively preventing delamination caused by long-term vibration. Furthermore, each layer can be tailored to different application scenarios and environmental conditions. For example, the arc-shaped groove structure of the elastic buffer layer optimizes vibration damping, and the number and thickness of the butyl rubber damping membrane can be customized. This allows the product to maintain stable performance even in complex environments such as high temperature, high humidity, and high vibration, making it widely applicable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a honeycomb structure polypropylene sound insulation and vibration damping pad proposed in this utility model;

[0016] Figure 2 This is a top view schematic diagram of the polypropylene honeycomb load-bearing layer structure proposed in this utility model;

[0017] Figure 3 This invention presents a schematic diagram of the back structure of the polypropylene honeycomb load-bearing layer.

[0018] Figure 4 This is a partial structural diagram of a honeycomb structure polypropylene sound insulation and vibration damping pad.

[0019] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point A.

[0020] In the figure: 1. Silica aerogel coating, 2. Polypropylene honeycomb load-bearing layer, 3. Honeycomb holes, 4. Cross-shaped reinforcing ribs, 5. Damping particles, 6. Damping resonance layer, 7. Butyl rubber damping membrane, 8. Polypropylene welded layer, 9. Elastic buffer layer, 10. Arc-shaped groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1-5 A honeycomb structure polypropylene sound insulation and vibration damping pad includes a polypropylene honeycomb load-bearing layer 2, a damping resonance layer 6, and an elastic buffer layer 9. The polypropylene honeycomb load-bearing layer 1 is integrally injection molded from modified polypropylene. The polypropylene honeycomb load-bearing layer 2 has densely distributed honeycomb holes 3. Each honeycomb hole 3 is a regular hexagon with a side length of 1-5mm. The wall thickness of the honeycomb hole 3 is 0.3-1mm. Cross-shaped reinforcing ribs 4 are provided in the honeycomb holes 3. The upper surface of the polypropylene honeycomb load-bearing layer 1 is coated with a silica aerogel coating 1, and the lower surface of the polypropylene honeycomb load-bearing layer 1 is provided with densely distributed damping particles 5.

[0023] The damping resonance layer 6 is located at the lower end of the polypropylene honeycomb load-bearing layer 2. The damping resonance layer 6 has uniformly distributed closed air holes inside. The lower end of the damping resonance layer 6 is provided with a butyl rubber damping membrane 7. A polypropylene fusion layer 8 with a thickness formed by hot pressing is provided between the damping resonance layer 6 and the elastic buffer layer 9. Glass fibers are uniformly distributed in the polypropylene fusion layer 8. The elastic buffer layer 9 is made of polypropylene / EPDM blended foam material. The elastic buffer layer 9 has honeycomb holes 3 with staggered arc-shaped grooves 10 inside. The honeycomb holes of adjacent layers of the polypropylene honeycomb load-bearing layer 2 are staggered at 45°.

[0024] It should be further noted that the depth of the arc-shaped groove 10 is 1 / 3 to 1 / 2 of the thickness of the elastic buffer layer 9.

[0025] It should be further noted that the butyl rubber damping membrane 7 has 3-5 layers, and each layer has a thickness of 0.2-0.8 mm.

[0026] In this invention, the specific method of using the device is as follows: external sound waves first contact the outermost silica aerogel coating 1. Due to its smooth and dense surface structure, it can mirror-reflect high-frequency sound waves, reducing the sound energy entering the sound insulation pad. The damping resonance layer 6 has a closed-cell structure with uniformly distributed pores. When high-frequency sound waves enter, they cause vibration of the air inside the pores, generating friction between the air and the pore walls, thus converting sound energy into heat energy, thereby reducing vibration and absorbing sound waves. The polypropylene honeycomb load-bearing layer 1 uses a three-dimensional orthogonal honeycomb grid, with adjacent honeycomb pores 3 staggered at 45°. When sound waves enter, they undergo multiple reflections and refractions within the channel. Each reflection and refraction consumes sound wave energy, effectively blocking the propagation of low-frequency sound waves. The three-dimensional orthogonal honeycomb grid structure has good mechanical properties; when subjected to vibration, it can disperse concentrated vibration sources to the inner walls of each honeycomb pore 3. This dispersion effect prevents excessive local stress from damaging the material. The butyl rubber damping membrane 7, located below the damping resonance layer 6, utilizes its viscoelastic properties. When external vibrations are transmitted, the molecular chains inside the membrane slip, dissipating a large amount of vibrational energy and effectively reducing the transmission of vibration to other components. When the elastic buffer layer 9 is subjected to vibration, the arc-shaped groove 10 inside undergoes nonlinear deformation, generating bending stress at its edges. This stress change converts mechanical energy into internal material energy, further enhancing the vibration damping effect.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A honeycomb structure polypropylene sound insulation and vibration damping pad, comprising a polypropylene honeycomb load-bearing layer (2), a damping resonance layer (6), and an elastic buffer layer (9), characterized in that, The polypropylene honeycomb load-bearing layer (2) is integrally injection molded from modified polypropylene. The polypropylene honeycomb load-bearing layer (2) has densely distributed honeycomb holes (3). Each honeycomb hole (3) is a regular hexagon with a side length of 1-5mm. The wall thickness of the honeycomb hole (3) is 0.3-1mm. The honeycomb hole (3) is provided with cross-shaped reinforcing ribs (4).

2. The honeycomb structure polypropylene sound insulation and vibration damping pad according to claim 1, characterized in that, The upper surface of the polypropylene honeycomb load-bearing layer (2) is coated with a silica aerogel coating (1), and the lower surface of the polypropylene honeycomb load-bearing layer (2) is provided with densely distributed damping particles (5).

3. The honeycomb structure polypropylene sound insulation and vibration damping pad according to claim 1, characterized in that, The damping resonance layer (6) is disposed at the lower end of the polypropylene honeycomb load-bearing layer (2). The damping resonance layer (6) is made of polypropylene-based composite foam material. The damping resonance layer (6) has uniformly distributed closed air holes inside. The lower end of the damping resonance layer (6) is provided with a butyl rubber damping membrane (7).

4. The honeycomb structure polypropylene sound insulation and vibration damping pad according to claim 3, characterized in that, A polypropylene weld layer (8) of a certain thickness is provided between the damping resonance layer (6) and the elastic buffer layer (9) by hot pressing process, and glass fibers are uniformly distributed in the polypropylene weld layer (8).

5. The honeycomb structure polypropylene sound insulation and vibration damping pad according to claim 1, characterized in that, The elastic buffer layer (9) is made of polypropylene / EPDM blended foam material, and the elastic buffer layer (9) has honeycomb holes (3) and staggered arc-shaped grooves (10).

6. The honeycomb structure polypropylene sound insulation and vibration damping pad according to claim 1, characterized in that, The adjacent honeycomb pores (3) of the polypropylene honeycomb load-bearing layer (2) are distributed at a 45° offset.

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