EVA board for automobile roof

Abstract

The utility model discloses a kind of EVA board for automobile roof, comprising: EVA board structure body and the bottom EVA board base layer of its bottommost position;Bottom EVA board base layer is provided with interposed heat insulation layer at the upside position, interposed heat insulation chamber is provided in interposed heat insulation layer, upper connecting heat insulation film is provided with upper absorption layer and is connected at the upside position of upper connecting heat insulation film, because the EVA board structure for traditional automobile roof is relatively simple, so its function is relatively single, the utility model is improved, and interposed heat insulation layer and upper connecting heat insulation film are made of aerogel composite sheet material, and its setting can make that heat absorption in car is reduced in summer, heat is retained in winter, air conditioning energy consumption is reduced, sound absorption slot hole in upper absorption layer can reduce noise by rough structure to weaken road noise, wind noise transmission, so as to effectively improve the EVA board for automobile roof practicality of use.

Description

Technical Field

[0001] This utility model relates to the field of new polymer materials, and in particular to an EVA sheet material for automobile roofs. Background Technology

[0002] EVA sheets used in car headliners are lightweight porous substrates made of ethylene-vinyl acetate copolymer through closed-cell foaming and molding. They are the mainstream material for the core layer of car headliners, and their core function is to support the interior structure.

[0003] Because traditional EVA sheets used for car roofs have a relatively simple structure, their function is relatively limited.

[0004] This utility model addresses the aforementioned problems by providing an improvement to a multi-structured EVA sheet material for automotive roofs. Utility Model Content

[0005] The main purpose of this invention is to address the problem that traditional EVA sheets used for car roofs have a relatively simple structure, resulting in limited functionality.

[0006] To address the aforementioned issues, this utility model proposes an EVA sheet material for automotive roofs, comprising: an EVA sheet material structure body and a bottom EVA sheet material base layer disposed at the bottommost position of the EVA sheet material structure body; A central heat insulation layer is provided on the upper side of the bottom EVA board base layer. A central heat insulation chamber is provided in the central heat insulation layer. An upper connecting heat insulation film is provided on the upper side of the central heat insulation layer. An upper sound absorption layer is connected to the upper side of the upper connecting heat insulation film. The upper sound absorption layer is provided with sound absorption grooves. The sound absorption grooves have a rough structure.

[0007] In one embodiment, a fastening connecting piece is provided in the sound-absorbing groove located at the corner on the upper sound-absorbing layer, a central insertion groove is provided in the center of the sound-absorbing groove, a side insertion groove is provided on the outside of the central insertion groove, and the side insertion groove and the central insertion groove penetrate through the EVA board structure body.

[0008] In one embodiment, a plug-in connecting post is provided in the middle of the central plug-in slot, and a bottom intercepting plate is provided on the bottom side of the plug-in connecting post. The bottom intercepting plate and the plug-in connecting post are an integral structure.

[0009] In one embodiment, the upper end of the plug-in connecting post is provided with an upper flip-rotating plate connected by a central connecting shaft, and a limiting card is provided on the side of the upper flip-rotating plate, the limiting card having the same shape as the side plug-in groove.

[0010] In one embodiment, a Velcro closure is provided on the outer side of the upper sound-absorbing layer and the bottom EVA substrate near the edge, and the surface of the Velcro closure has a hook-shaped structure.

[0011] In one embodiment, a side connecting structure is provided on the side of the EVA sheet material structure body, and the side connecting structure is an I-shaped structure.

[0012] In one embodiment, the side of the side connecting structure is provided with a rubber flip connecting piece, and the upper and lower rubber flip connecting pieces form an insertion connecting groove.

[0013] In one embodiment, a connecting hook is provided on the inner side of the rubber flip-connecting piece, and the surface of the connecting hook has a fiber ring structure.

[0014] Beneficial effects: 1. In EVA panels used for automotive headliners, a central heat insulation layer is installed on the upper side of the bottom EVA panel base. This central heat insulation layer contains a central heat insulation chamber. An upper connecting heat insulation film is installed on the upper side of the central heat insulation layer, and an upper sound-absorbing layer is connected to the upper side of the upper connecting heat insulation film. The upper sound-absorbing layer has sound-absorbing grooves with a rough structure. Because traditional EVA panels for automotive headliners have a relatively simple structure, their function is relatively limited. This improved version uses an aerogel composite material for both the central heat insulation layer and the upper connecting heat insulation film. This design reduces heat absorption inside the vehicle in summer and retains heat in winter, reducing air conditioning energy consumption. The sound-absorbing grooves in the upper sound-absorbing layer reduce noise transmission through the rough structure, specifically weakening road and wind noise, thus effectively improving the practicality of EVA panels used for automotive headliners.

[0015] 2. In the EVA sheet material used for automotive headliners, fastening connecting pieces are installed in the sound-absorbing grooves located at the corners of the upper sound-absorbing layer. A central insertion groove is provided at the center of the sound-absorbing groove, and a side insertion groove is provided on the outside of the central insertion groove. The side insertion groove and the central insertion groove penetrate the EVA sheet material structure. An insertion connecting post is provided in the middle of the central insertion groove, and a bottom intercepting plate is provided on the bottom side of the insertion connecting post. The bottom intercepting plate and the insertion connecting post are an integral structure. An upper flip-rotating plate is provided at the upper end of the insertion connecting post, which is connected to the central connecting pivot. A limit clip is provided on the side of the upper flip-rotating plate. The sheet, the limiting card, and the side insertion slot have the same shape. Because traditional EVA sheets are usually connected by hot pressing or adhesive, these connection methods are not conducive to replacing damaged parts, thus easily causing resource waste. This utility model improves the connection by having the insertion connecting post pass through the central insertion slot, and then rotating the upper flip-rotating piece to make the limiting card and the side insertion slot misaligned to achieve the limiting snap-fit. This connection method is simple and quick, and can facilitate subsequent users to disassemble and replace the structural layers that need to be replaced according to actual needs, thereby effectively improving the practicality of EVA sheets used in automotive roofs.

[0016] 3. In the EVA sheet material used for automotive headliners, Velcro is installed near the edge of the outer side of the upper sound-absorbing layer and the bottom EVA sheet base. The surface of the Velcro has a hook-shaped structure. A side connecting structure is installed on the side of the EVA sheet structure. The side connecting structure has an I-shaped structure and a rubber flip-connecting piece on the side. The upper and lower rubber flip-connecting pieces form an interlocking groove. A connecting Velcro is installed on the inner side of the rubber flip-connecting piece. The surface of the connecting Velcro has a fiber ring structure. Because traditional EVA sheets for automotive headliners are usually of a single structure, when splicing is required, adhesive is usually used for bonding, which is not conducive to subsequent replacement. In this improved version, the rubber flip-connecting piece is flipped and then bonded to the Velcro with the connecting Velcro. In this way, the two parts of the EVA sheet material for automotive headliners are connected to each other. When disassembly is required, it can be completed by simply tearing with a little force. The operation is simple and quick, which can effectively improve the efficiency of installation and replacement. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the overall structure of the EVA sheet material for automobile roofing according to this utility model; Figure 2 This is a front view cross-sectional structural diagram of the EVA sheet material for automobile roofing according to this utility model; Figure 3 This is a schematic diagram of the central heat insulation layer structure of the EVA sheet material used in automobile roofs according to this utility model; Figure 4 This is an enlarged structural diagram of the EVA sheet material for automobile roofing of this utility model at position A; Figure 5 This is an enlarged structural diagram of the EVA sheet material for automobile roofing, located at position B.

[0019] The annotations in the attached figures are explained as follows: 1. EVA sheet body structure; 2. Side connection structure; 3. Velcro; 4. Central heat insulation layer; 5. Central heat insulation chamber; 6. Top sound absorption layer; 7. Top connection heat insulation film; 8. Bottom EVA sheet base layer; 9. Sound absorption groove; 10. Fastening connection piece; 11. Top flip-rotating piece; 12. Limiting card; 13. Side insertion groove; 14. Central insertion groove; 15. Bottom interception piece; 16. Insertion connection post; 17. Central connection shaft; 18. Insertion connection groove; 19. Connecting Velcro; 20. Rubber flip-rotating connection piece. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] To achieve the above-mentioned utility model objectives, such as Figure 1-5 As shown, this utility model provides an EVA sheet for automobile roof, including: an EVA sheet structure body 1 and a bottom EVA sheet base layer 8 disposed at the bottommost position of the EVA sheet structure body 1; A central heat insulation layer 4 is provided on the upper side of the bottom EVA sheet base layer 8. A central heat insulation chamber 5 is provided in the central heat insulation layer 4. An upper connecting heat insulation film 7 is provided on the upper side of the central heat insulation layer 4. An upper sound absorption layer 6 is connected to the upper side of the upper connecting heat insulation film 7. The upper sound absorption layer 6 is provided with sound absorption grooves 9. The sound absorption grooves 9 have a rough structure. Because the structure of traditional EVA sheets used for car roofs is relatively simple, its function is relatively limited. In this improved version, the central heat insulation layer 4 and the upper connecting heat insulation film 7 are made of aerogel composite sheet material. This design can reduce heat absorption in the car interior in summer and retain heat in winter, thereby reducing air conditioning energy consumption. The sound absorption grooves 9 in the upper sound absorption layer 6 can reduce noise through the rough structure, specifically weakening road noise and wind noise transmission, thus effectively improving the practicality of EVA sheets used for car roofs.

[0022] like Figure 1 , Figure 4 and Figure 5 As shown, a fastening connecting piece 10 is provided in the sound-absorbing groove 9 located at the corner on the upper sound-absorbing layer 6. A central insertion groove 14 is provided in the center of the sound-absorbing groove 9. A side insertion groove 13 is provided on the outside of the central insertion groove 14. The side insertion groove 13 and the central insertion groove 14 penetrate through the EVA board structure body 1. An insertion connecting post 16 is provided in the middle of the central insertion groove 14. A bottom intercepting piece 15 is provided on the bottom side of the insertion connecting post 16. The bottom intercepting piece 15 and the insertion connecting post 16 are an integral structure. An upper flipping rotating piece 11 is provided at the upper end of the insertion connecting post 16 and is connected to the central connecting pivot 17. The upper flipping rotating piece 11 is connected to the side of the upper flipping rotating piece 11. The limiting card 12 has the same shape as the side insertion slot 13. Because traditional EVA sheets are usually connected by hot pressing or adhesive, these connection methods are not conducive to replacing damaged parts, thus easily causing waste of resources. In this utility model, the plug-in connecting post 16 passes through the central insertion slot 14, and then the upper flip rotating piece 11 is rotated to make the limiting card 12 and the side insertion slot 13 misaligned to achieve limiting snap-fit. This connection method is simple and quick, and can facilitate subsequent users to disassemble and replace the structural layers that need to be replaced according to actual needs, thereby effectively improving the practicality of EVA sheets used for car roofs.

[0023] like Figure 1 and Figure 5As shown, Velcro 3 is provided near the edge of the outer side of the upper sound-absorbing layer 6 and the bottom EVA board base layer 8. The surface of Velcro 3 has a hook-shaped structure. A side connecting structure 2 is provided on the side of the EVA board structure body 1. The side connecting structure 2 has an I-shaped structure. A rubber flip connecting piece 20 is provided on the side of the side connecting structure 2, and the upper and lower rubber flip connecting pieces 20 form an insertion connecting groove 18. A connecting Velcro 19 is provided on the inner side of the rubber flip connecting piece 20. The surface of the connecting Velcro 19 has a fiber ring structure. Because traditional EVA boards used for car roofs are usually of integral structure, when splicing is required, adhesive is usually used for bonding, which is not conducive to subsequent replacement. In this improved version, the rubber flip connecting piece 20 is flipped and then bonded to the Velcro 3 through the connecting Velcro 19. In this way, the two parts of the EVA board used for car roofs are connected to each other. When disassembly is required, it can be completed by tearing with a little force. The operation is simple and quick, which can effectively improve the efficiency of installation and replacement.

[0024] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An EVA sheet material for automotive headliners, characterized in that, include: EVA sheet structure body (1) and the bottom EVA sheet base layer (8) set at the bottommost position of the EVA sheet structure body (1). A central heat insulation layer (4) is provided on the upper side of the bottom EVA board base layer (8). A central heat insulation chamber (5) is provided in the central heat insulation layer (4). An upper connecting heat insulation film (7) is provided on the upper side of the central heat insulation layer (4). An upper sound absorption layer (6) is connected to the upper side of the upper connecting heat insulation film (7). A sound absorption groove (9) is provided on the upper sound absorption layer (6). The sound absorption groove (9) has a rough structure.

2. The EVA sheet material for automotive headliners as described in claim 1, characterized in that, A fastening connecting piece (10) is provided in the sound-absorbing groove (9) located at the corner of the upper sound-absorbing layer (6). A central insertion groove (14) is provided in the center of the sound-absorbing groove (9). A side insertion groove (13) is provided on the outside of the central insertion groove (14). The side insertion groove (13) and the central insertion groove (14) penetrate the EVA board structure body (1).

3. The EVA sheet material for automotive headliners as described in claim 2, characterized in that, The central insertion slot (14) is provided with a insertion connection post (16) in the middle, and a bottom intercepting plate (15) is provided on the bottom side of the insertion connection post (16). The bottom intercepting plate (15) and the insertion connection post (16) are an integral structure.

4. The EVA sheet material for automotive headliners as described in claim 3, characterized in that, The upper end of the plug-in connecting post (16) is provided with an upper flip-rotating plate (11) connected by a central connecting shaft (17). The upper flip-rotating plate (11) is provided with a limit card (12) on its side. The limit card (12) has the same shape as the side plug-in groove (13).

5. The EVA sheet material for automotive headliners as described in claim 4, characterized in that, The upper sound-absorbing layer (6) and the bottom EVA board base layer (8) are provided with Velcro (3) near the edge on the outside. The surface of the Velcro (3) is hook-shaped.

6. The EVA sheet material for automotive headliners as described in claim 5, characterized in that, A side connection structure (2) is provided on the side of the EVA sheet material structure body (1), and the side connection structure (2) is an I-shaped structure.

7. An EVA sheet material for automotive headliners as described in claim 6, characterized in that, The side connection structure (2) is provided with rubber flip-connecting pieces (20) on the side, and the upper and lower rubber flip-connecting pieces (20) form a plug-in connection groove (18).

8. An EVA sheet material for automotive headliners as described in claim 7, characterized in that, The inner side of the rubber flip-connecting piece (20) is provided with a connecting hook and loop fastener (19), and the surface of the connecting hook and loop fastener (19) is a fiber ring structure.

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