EVA sound insulation foam for automobile parts

Abstract

The EVA sound insulation foam for the automobile parts comprises an EVA foam assembly, an adhesive tape structure is arranged at the bottom of the EVA foam assembly, the EVA foam assembly is bonded and fixed to the bottom face of a cabin cover through the adhesive tape structure at the bottom, the EVA foam assembly comprises a foam sound insulation structure, and an edge sealing sleeve is fixedly installed on the outer side of the foam sound insulation structure. The foam sound insulation structure comprises a surface EVA foam layer, the bottom of the surface EVA foam layer is fixed to a flannelette layer in an adhesive mode through an adhesive layer, and meanwhile the flannelette layer fixedly covers the surface of the sound absorption fiberboard. According to the EVA sound insulation foam for the automobile parts, a plurality of groups of sound absorption holes are uniformly formed in the surface of the surface EVA foam layer; due to the arrangement of the multiple sets of sound absorption holes, the contact area between the EVA foam assembly and sound waves can be increased, and the sound absorption effect of the EVA foam assembly is improved; through the arrangement of the EVA foam assembly, the sound absorption performance of the cabin cover can be improved, noise generated by a cabin engine is reduced, and the driving experience of a driver in a cab is improved.

Description

Technical Field

[0001] The utility model relates to the field of sound insulation foam, in particular to EVA sound insulation foam for automobile accessories. Background Art

[0002] Auto parts are the various units that make up the whole car and a kind of product that serves the car. There are many kinds of auto parts. With the improvement of people's living standards, people's consumption of cars is increasing, and the market for auto parts is becoming larger and larger. In recent years, auto parts manufacturers are also developing rapidly.

[0003] Take the automotive accessory engine cover as an example. The engine cover covers the top of the engine, and its sound absorption performance directly determines the driving experience of the driver inside the cab. The engine cover in the existing technology cannot achieve high-performance sound insulation. After the engine is started, it produces a lot of noise, which reduces the driver's driving experience. Utility Model Content

[0004] The purpose of the utility model is to provide an EVA sound insulation foam for automobile parts to solve the defects mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, an EVA sound insulation foam for automotive accessories is provided, comprising an EVA foam component, a viscose strip structure is arranged at the bottom of the EVA foam component, and the EVA foam component is bonded and fixed to the bottom surface of the engine cover through the viscose strip structure at the bottom, the EVA foam component comprises a foam sound insulation structure, and an edge sealing sleeve is fixedly installed on the outer side of the foam sound insulation structure, the foam sound insulation structure comprises a surface EVA foam layer, and the bottom of the surface EVA foam layer is bonded and fixed to the flannel layer through an adhesive layer, and at the same time, the flannel layer is fixedly covered on the surface of the sound-absorbing fiberboard, and the sound-absorbing fiberboard is fixedly bonded to the surface of the bottom EVA foam layer.

[0006] Preferably, a plurality of groups of sound-absorbing holes are evenly arranged on the surface of the surface EVA foam layer, and the cross-section of the sound-absorbing holes is arranged in a semicircular shape, and the distances between two adjacent groups of sound-absorbing holes are consistent.

[0007] Preferably, the surface EVA foam layer, flannel layer, sound-absorbing fiberboard and bottom EVA foam layer are arranged in layers from top to bottom, and the thickness of the surface EVA foam layer is less than the thickness of the bottom EVA foam layer.

[0008] Preferably, the thickness of the surface EVA foam layer is 3 mm, and the thickness of the bottom EVA foam layer is 4 mm, and the outer sides of the surface EVA foam layer and the bottom EVA foam layer are sealed by edge sealing sleeves.

[0009] Preferably, the thickness of the flannel layer is 1 mm, and the thickness of the sound-absorbing fiberboard is 1.7 mm, while the total thickness of the EVA foam component is 10 mm, the EVA foam component is consistent with the shape of the cabin cover, and the area of ​​the EVA foam component is equal to two-thirds of the bottom area of ​​the cabin cover.

[0010] Preferably, the adhesive strip structure includes an outer adhesive strip, and a middle adhesive strip is arranged on the inner side of the outer adhesive strip, and an inner adhesive strip is arranged on the inner side of the middle adhesive strip, and a vertical adhesive strip is arranged in the middle of the inner adhesive strip. The EVA foam component is bonded to the surface of the cabin cover through the outer adhesive strip, the middle adhesive strip, the inner adhesive strip and the vertical adhesive strip at the bottom.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The EVA foam component is provided with a surface EVA foam layer and a bottom EVA foam layer, and the surface EVA foam layer and the bottom EVA foam layer are stacked together to increase the sound absorption effect;

[0013] A flannel layer and a sound-absorbing fiberboard are arranged between the surface EVA foam layer and the bottom EVA foam layer to increase the sound-absorbing performance of the foam;

[0014] The EVA foam component is bonded to the surface of the engine cover through the outer rubber strip, the middle rubber strip, the inner rubber strip and the vertical rubber strip at the bottom; it will not loosen, ensuring the tightness of the bonding between the EVA foam component and the engine cover, so that the EVA foam component and the engine cover are closely fitted; the sound absorption effect of the EVA foam component is maximized;

[0015] The surface of the surface EVA foam layer is evenly provided with multiple groups of sound-absorbing holes; the setting of multiple groups of sound-absorbing holes can increase the contact area between the EVA foam component and the sound waves, and improve the sound-absorbing effect of the EVA foam component;

[0016] By setting the EVA foam component, the sound absorption performance of the engine cover can be improved, the noise generated by the engine in the cabin can be reduced, and the driving experience of the driver inside the cab can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front view of the structure of the utility model;

[0018] Figure 2 The utility model structure Figure 1 AA section structure schematic diagram in;

[0019] Figure 3 The utility model structure Figure 2 Schematic diagram of the structure at A in FIG.

[0020] Figure 4This is a schematic diagram of the EVA foam component of the utility model structure;

[0021] Figure 5 This is a schematic diagram of the structure of the structural adhesive strip of the utility model.

[0022] Numbers in the figure: 1. Engine cover; 2. EVA foam assembly; 21. Edge banding; 22. Foam sound insulation structure; 221. Surface EVA foam layer; 222. Sound-absorbing holes; 223. Adhesive layer; 224. Flannel layer; 225. Sound-absorbing fiberboard; 226. Bottom EVA foam layer; 23. Adhesive strip structure; 231. Outer rubber strip; 232. Middle rubber strip; 233. Inner rubber strip; 234. Vertical rubber strip. DETAILED DESCRIPTION

[0023] See also Figure 1-5 The utility model provides an EVA sound insulation foam for automobile accessories, including an EVA foam component 2, a glue strip structure 23 is arranged at the bottom of the EVA foam component 2, and the EVA foam component 2 is bonded and fixed to the bottom surface of the engine cover 1 through the glue strip structure 23 at the bottom, the EVA foam component 2 includes a foam sound insulation structure 22, and an edge sealing sleeve 21 is fixedly installed on the outer side of the foam sound insulation structure 22, the foam sound insulation structure 22 includes a surface EVA foam layer 221, and the bottom of the surface EVA foam layer 221 is bonded and fixed to a flannel layer 224 through an adhesive layer 223, and at the same time, the flannel layer 224 is fixedly covered on the surface of a sound-absorbing fiberboard 225, and the sound-absorbing fiberboard 225 is fixedly bonded to the surface of the bottom EVA foam layer 226.

[0024] Working principle: The inner surface of the engine cover 1 is bonded to the EVA foam component 2 through the adhesive strip structure 23. The setting of the EVA foam component 2 can improve the sound absorption performance of the engine cover 1, reduce the noise generated by the engine in the cabin, and improve the driving experience of the driver in the cab;

[0025] The EVA foam component 2 has a surface EVA foam layer 221 and a bottom EVA foam layer 226 disposed therein. The surface EVA foam layer 221 and the bottom EVA foam layer 226 are stacked together to increase the sound absorption effect.

[0026] A flannel layer 224 and a sound-absorbing fiberboard 225 are provided between the surface EVA foam layer 221 and the bottom EVA foam layer 226 to increase the sound-absorbing performance of the foam;

[0027] The EVA foam component 2 is bonded to the surface of the engine cover 1 by the outer rubber strip 231, the middle rubber strip 232, the inner rubber strip 233 and the vertical rubber strip 234 at the bottom; it will not loosen, ensuring the tightness of the bonding between the EVA foam component 2 and the engine cover 1, so that the EVA foam component 2 and the engine cover 1 are tightly fitted; the sound absorption effect of the EVA foam component 2 is maximized.

[0028] As a preferred embodiment, a plurality of groups of sound absorbing holes 222 are evenly arranged on the surface of the surface EVA foam layer 221 , and the cross-section of the sound absorbing holes 222 is arranged in a semicircular shape, and the distance between two adjacent groups of sound absorbing holes 222 is consistent.

[0029] like Figure 1-4 As shown: a plurality of groups of sound-absorbing holes 222 are evenly arranged on the surface of the surface EVA foam layer 221; the arrangement of the plurality of groups of sound-absorbing holes 222 can increase the contact area between the EVA foam component 2 and the sound waves, thereby improving the sound-absorbing effect of the EVA foam component 2.

[0030] As a preferred embodiment, the surface EVA foam layer 221 , the flannel layer 224 , the sound-absorbing fiberboard 225 and the bottom EVA foam layer 226 are arranged in layers from top to bottom, and the thickness of the surface EVA foam layer 221 is less than the thickness of the bottom EVA foam layer 226 .

[0031] like Figure 1-4 As shown: the flannel layer 224 and the sound-absorbing fiberboard 225 are arranged between the surface EVA foam layer 221 and the bottom EVA foam layer 226 , which can help increase the sound absorption performance of the EVA foam component 2 .

[0032] As a preferred embodiment, the thickness of the surface EVA foam layer 221 is 3 mm, and the thickness of the bottom EVA foam layer 226 is 4 mm. At the same time, the outer sides of the surface EVA foam layer 221 and the bottom EVA foam layer 226 are sealed by an edge sealing sleeve 21.

[0033] like Figure 1-3 As shown: the outer side of the foam sound insulation structure 22 is edged by an edge sealing sleeve 21 to prevent burrs or burrs from forming on the edge of the foam sound insulation structure 22 .

[0034] As a preferred embodiment, the thickness of the velvet layer 224 is 1 mm, and the thickness of the sound-absorbing fiberboard 225 is 1.7 mm. At the same time, the total thickness of the EVA foam component 2 is 10 mm. The EVA foam component 2 is consistent with the shape of the cabin cover 1, and the area of ​​the EVA foam component 2 is equal to two-thirds of the bottom area of ​​the cabin cover 1.

[0035] The adhesive strip structure 23 includes an outer adhesive strip 231, and a middle adhesive strip 232 is arranged on the inner side of the outer adhesive strip 231, and an inner adhesive strip 233 is arranged on the inner side of the middle adhesive strip 232, and a vertical adhesive strip 234 is arranged in the middle of the inner adhesive strip 233. The EVA foam component 2 is bonded to the surface of the cabin cover 1 through the outer adhesive strip 231, the middle adhesive strip 232, the inner adhesive strip 233 and the vertical adhesive strip 234 at the bottom.

Claims

1. An EVA sound insulation foam for automobile parts, comprising an EVA foam component (2), characterized in that: The bottom of the EVA foam component (2) is provided with an adhesive strip structure (23), and the EVA foam component (2) is bonded and fixed to the bottom surface of the cabin cover (1) by the adhesive strip structure (23) at the bottom. The EVA foam component (2) includes a foam sound insulation structure (22), and an edge sealing sleeve (21) is fixedly installed on the outer side of the foam sound insulation structure (22). The foam sound insulation structure (22) includes a surface EVA foam layer (221), and the bottom of the surface EVA foam layer (221) is bonded and fixed to the flannel layer (224) by the adhesive layer (223), and at the same time, the flannel layer (224) is fixedly covered on the surface of the sound-absorbing fiberboard (225), and the sound-absorbing fiberboard (225) is fixedly bonded to the surface of the bottom EVA foam layer (226).

2. The EVA sound insulation foam for automobile parts according to claim 1, characterized in that: A plurality of groups of sound-absorbing holes (222) are evenly arranged on the surface of the surface EVA foam layer (221), and the cross-section of the sound-absorbing holes (222) is arranged in a semicircular shape, and the distance between two adjacent groups of sound-absorbing holes (222) is consistent.

3. The EVA sound insulation foam for automobile parts according to claim 1, characterized in that: The surface EVA foam layer (221), the flannel layer (224), the sound-absorbing fiberboard (225) and the bottom EVA foam layer (226) are arranged in layers from top to bottom, and the thickness of the surface EVA foam layer (221) is smaller than the thickness of the bottom EVA foam layer (226).

4. The EVA sound insulation foam for automobile parts according to claim 1, characterized in that: The thickness of the surface EVA foam layer (221) is 3 mm, and the thickness of the bottom EVA foam layer (226) is 4 mm. At the same time, the outer sides of the surface EVA foam layer (221) and the bottom EVA foam layer (226) are sealed by an edge sealing sleeve (21).

5. The EVA sound insulation foam for automobile parts according to claim 1, characterized in that: The thickness of the flannel layer (224) is 1 mm, and the thickness of the sound-absorbing fiberboard (225) is 1.7 mm. Meanwhile, the total thickness of the EVA foam component (2) is 10 mm. The EVA foam component (2) is consistent in shape with the cabin cover (1), and the area of ​​the EVA foam component (2) is equal to two-thirds of the bottom area of ​​the cabin cover (1).

6. The EVA sound insulation foam for automobile parts according to claim 1, characterized in that: The adhesive strip structure (23) comprises an outer adhesive strip (231), and a middle adhesive strip (232) is arranged on the inner side of the outer adhesive strip (231), and an inner adhesive strip (233) is arranged on the inner side of the middle adhesive strip (232), and a vertical adhesive strip (234) is arranged in the middle of the inner adhesive strip (233). The EVA foam component (2) is bonded to the surface of the cabin cover (1) through the outer adhesive strip (231), the middle adhesive strip (232), the inner adhesive strip (233) and the vertical adhesive strip (234) at the bottom.

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