A composite structure with large concave surfaces for automotive interior panels
Patent Information
- Application Number
- CN202522020408.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-19
- Publication Date
- 2026-09-01
- Estimated Expiration
- 2035-09-19
AI Technical Summary
但是：所述表皮在经过夏季暴晒或长期处于高温环境下时，所述内饰板本体与所述表皮之间的胶粘剂会受热膨胀，又因为所述内饰板本体与所述表皮之间的区域边沿均被所述表皮密封，其内的气体无法排出，易在所述内饰板本体的凹面底部形成鼓包；另外，当凹面深度过大时，如大于50mm时，表皮拉伸易导致局部变薄甚至破裂
[0016]在本申请实施例中，汽车内饰板大凹面复合结构包括基板本体，基板本体具有中间部、第一延伸部和第二延伸部，第一延伸部和第二延伸部分别位于中间部的两侧，中间部具有中鼓段和两收窄端，中鼓段位于两收窄端之间，中间部还具有第一凹面，第一凹面自一收窄端延伸至另一收窄端，且中鼓段为第一凹面的底部区域，第一延伸部和第二延伸部分别具有第一曲面和第二曲面，第一曲面和第二曲面均与第一凹面圆滑过渡，基板本体的一面包覆有表皮，基板本体间隔布置有排气孔，排气孔位于中间部和第一延伸部上，通过设置排气孔，当胶粘剂在高温下使得其内部微小气泡快速膨胀时，可自排气孔排出，避免了表皮呈“鼓包”状的风险，相较于现有技术，具有表皮不易鼓包的优势。
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Figure CN224702983U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automotive interior panel technology, and more specifically to a large concave composite structure for automotive interior panels. Background Technology
[0002] Automotive interior trim panels are decorative and practical components specifically designed for the interior space of a car. By covering areas such as doors, headliner, around seats, and center console, interior trim panels effectively protect the car's internal structure from daily wear and tear (such as collisions when passengers get in and out of the car, and friction from objects), while also providing shielding and protection for in-car equipment (such as audio systems and air conditioning vents).
[0003] An automotive interior trim panel includes a panel body and a cover. The panel body has a continuous concave shape with a depth of less than 30mm. The cover is adhered to the surface of the panel body using adhesive. However, when the cover is exposed to direct sunlight in summer or in a high-temperature environment for a long time, the adhesive between the panel body and the cover will expand due to heat. Furthermore, because the edges between the panel body and the cover are sealed by the cover, the gas inside cannot escape, easily forming bulges at the bottom of the concave surface of the panel body. Additionally, when the concave depth is too large, such as greater than 50mm, the cover can stretch, leading to localized thinning or even cracking.
[0004] Therefore, there is a need for a large concave composite structure for automotive interior panels that is less prone to bulging and cracking. Summary of the Invention
[0005] The main objective of this application is to provide a large concave composite structure for automotive interior panels. This structure includes a substrate body with a central portion, a first extension portion, and a second extension portion. The first and second extension portions are located on opposite sides of the central portion. The central portion has a central bulge section and two narrowing ends, with the central bulge section located between the two narrowing ends. The central portion also has a first concave surface extending from one narrowing end to the other, with the central bulge section forming the bottom region of the first concave surface. The first and second extension portions each have a first curved surface and a second curved surface, both smoothly transitioning to the first concave surface. One side of the substrate body is covered with a skin. Vent holes are spaced apart on the substrate body, located on the central portion and the first extension portion. By providing vent holes, when the adhesive causes its internal microbubbles to expand rapidly at high temperatures, they can be discharged through the vent holes, avoiding the risk of the skin forming "bulges." Compared to existing technologies, this structure has the advantage of being less prone to bulging.
[0006] Another objective of this application is to provide a large concave composite structure for automotive interior panels, wherein the second extension has a transition protrusion on the side opposite to the middle part, and the top surface of the transition protrusion is a slope with a slope angle of less than 30°. By setting the transition protrusion as a physical fulcrum for skin stretching, the tensile stress is dispersed, which helps to reduce the risk of skin breakage during stretching. Compared with the prior art, it has the advantage of skin not being easily broken.
[0007] To achieve at least one of the above-mentioned objectives, this application provides a large concave composite structure for automotive interior panels, wherein the large concave composite structure for automotive interior panels includes: The substrate body has a middle portion, a first extension portion, and a second extension portion. The first extension portion and the second extension portion are respectively located on both sides of the middle portion. The middle portion has a central bulge section and two narrowing ends. The central bulge section is located between the two narrowing ends. The middle portion also has a first concave surface. The first concave surface extends from one of the narrowing ends to the other narrowing end, and the central bulge section is the bottom region of the first concave surface. The first extension portion and the second extension portion each have a first curved surface and a second curved surface. The first curved surface and the second curved surface are both smoothly transitioned to the first concave surface. One side of the substrate body is covered with a skin. The substrate body is provided with vent holes at intervals. The vent holes are located on the middle portion and the first extension portion.
[0008] In one or more embodiments of this application, the second extension has a transition protrusion on the side opposite to the middle portion, and the top surface of the transition protrusion is a slope with a slope angle of less than 30°.
[0009] In one or more embodiments of this application, the side of the substrate body facing away from the skin has a shallow groove, the edges of the skin are all folded into the shallow groove, and the skin is bonded to the side of the substrate body facing away from the shallow groove.
[0010] In one or more embodiments of this application, the contoured shallow groove has a plurality of snap-fit ends, which are arranged around the edge of the contoured shallow groove.
[0011] In one or more embodiments of this application, the middle drum section has a first through groove.
[0012] In one or more embodiments of this application, the second extension has a second through groove.
[0013] In one or more embodiments of this application, the length of the first through groove is greater than the length of the second through groove, and the second through groove is located in the middle section of the first through groove.
[0014] In one or more embodiments of this application, the epidermis includes a cortical layer and a tensile fiber mesh layer, wherein the tensile fiber mesh layer is located below the cortical layer and is bonded to the cortical layer.
[0015] In one or more embodiments of this application, the distance from the edge of the first through groove away from the second extension to the lowest point of the connection between the first curved surface and the first concave surface is 50mm to 53mm.
[0016] In this embodiment, the large concave composite structure of the automotive interior panel includes a substrate body. The substrate body has a middle portion, a first extension portion, and a second extension portion. The first extension portion and the second extension portion are located on both sides of the middle portion. The middle portion has a central bulge section and two narrowing ends. The central bulge section is located between the two narrowing ends. The middle portion also has a first concave surface. The first concave surface extends from one narrowing end to the other narrowing end, and the central bulge section is the bottom area of the first concave surface. The first extension portion and the second extension portion have a first curved surface and a second curved surface, respectively. The first curved surface and the second curved surface are smoothly transitioned to the first concave surface. One side of the substrate body is covered with a skin. The substrate body is provided with vent holes at intervals. The vent holes are located on the middle portion and the first extension portion. By providing vent holes, when the adhesive causes its internal microbubbles to expand rapidly at high temperature, they can be discharged from the vent holes, avoiding the risk of the skin forming a "bulge". Compared with the prior art, it has the advantage that the skin is less prone to bulging. Attached Figure Description
[0017] These and / or other aspects and advantages of this application will become clearer and more readily understood from the following detailed description of embodiments of this application taken in conjunction with the accompanying drawings, wherein: Figure 1 The figure shows a schematic diagram of the large concave composite structure of an automotive interior panel according to this application at a certain angle; Figure 2 The illustration shows a structural schematic diagram of a large concave composite structure for automotive interior panels from another angle. Figure 3 The illustration shows a structural diagram of a large concave composite structure for automotive interior panels from another angle. Figure 4 The illustration shows a structural schematic of a large concave composite structure for automotive interior panels at a different angle. Figure 5 The illustration shows a structural schematic of a composite structure with a large concave surface in an automotive interior panel, featuring a shallow groove on one side. Figure 6 The illustration shows a cross-sectional view of a large concave composite structure for automotive interior panels at a certain angle. Figure 7 The diagram shows... Figure 6 A magnified view of a portion at point C; Figure 8The diagram illustrates the distance from one edge of the first through groove to the lowest point at the junction of the first curved surface and the first concave surface. Detailed Implementation
[0018] The terms and words used in the following specification and claims are not limited to their literal meaning, but are used solely by the inventors to enable a clear and consistent understanding of this application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of this application is provided for illustrative purposes only and not for the purpose of limiting the application as defined in the appended claims and their equivalents.
[0019] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.
[0020] While ordinal numbers such as "first," "second," etc., will be used to describe various components, there is no limitation on which components are used herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the teachings of the utility model concept. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0021] The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. It will also be understood that the terms “comprising” and / or “having” as used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.
[0022] Schematic illustration of a large concave composite structure in automotive interior trim panels, for reference. Figures 1 to 8 According to a preferred embodiment of the present invention, a large concave composite structure for automotive interior panels includes a substrate body 10 and a skin 20.
[0023] Specifically, the substrate body 10 has a middle portion 101, a first extension portion 102, and a second extension portion 103. The first extension portion 102 and the second extension portion 103 are respectively located on both sides of the middle portion 101. The middle portion 101 has a central bulging section 1011 and two narrowing ends 1012. The central bulging section 1011 is located between the two narrowing ends 1012. The middle portion 101 also has a first concave surface 1013, which extends from one narrowing end 1012 to the other narrowing end 1012. The drum section 1011 is the bottom region of the first concave surface 1013. The first extension 102 and the second extension 103 have a first curved surface 1021 and a second curved surface 1031, respectively. The first curved surface 1021 and the second curved surface 1031 are smoothly transitioned to the first concave surface 1013. One side of the substrate body 10 is covered with the skin 20 by adhesive. The substrate body 10 is provided with vent holes 104 at intervals. The vent holes 104 are located on the middle part 101 and the first extension 102.
[0024] It should be noted that by providing the vent 104 on the substrate body 10, when the automotive interior panel concave composite structure is in a high-temperature environment for a long time, the gas generated by the thermal expansion of the adhesive can be discharged from the vent 104, thereby avoiding the gas from being difficult to discharge and causing the skin 20 to bulge. Compared with the prior art, it has the advantage that the skin 20 is less prone to bulging.
[0025] Furthermore, in this application, the middle drum section 1011 has a first through groove 1014, and the distance from the edge of the first through groove 1014 away from the second extension 103 to the lowest point of the connection between the first curved surface 1021 and the first concave surface 1013 is 50mm to 53mm, that is... Figure 8 The distance of the "d" is 50mm to 53mm.
[0026] It should be noted that in the prior art, the average distance from one side of the first through groove 1014 to the lowest point of the connection between the first curved surface 1021 and the first concave surface 1013 is less than 30 mm. Due to the large depth dimension, to reduce the risk of the skin 20 cracking when stretched and covering the substrate body 10, in this application, the skin 20 includes a cortical layer and a tensile fiber mesh layer, with the tensile fiber mesh layer located below the cortical layer and bonded to it.
[0027] It should be noted that the fiber direction of the tensile fiber mesh layer is arranged along the principal curvature direction of the substrate body 10. By setting the tensile fiber mesh layer, the overall strength of the skin 20 is improved and the risk of the skin 20 breaking after stretching is reduced.
[0028] In addition, such as Figure 6 and Figure 7 As shown, the second extension 103 has a transition protrusion 1031 on the side opposite to the middle part 101, and the top surface of the transition protrusion 1031 is a slope, and the slope angle is less than 30°.
[0029] It should be noted that by setting the transition protrusion 1031, it can serve as a physical fulcrum when the skin 20 is stretched, dispersing the tensile stress of the skin 20 at the lowest point of the connection between the first concave surface 1013 and the first curved surface 1021 to the periphery, reducing the abrupt change when the skin 20 is stretched, and further reducing the risk of the skin 20 breaking after stretching.
[0030] Furthermore, in this application, to prevent the edges of the skin 20 from being exposed, such as... Figure 5 As shown, the substrate body 10 has a shallow groove 105 on the side opposite to the skin 20, and the edges of the skin 20 are all folded into the shallow groove 105. The skin 20 is bonded to the side of the substrate body 10 opposite to the shallow groove 105.
[0031] Furthermore, to facilitate the mounting of the substrate body 10 onto the vehicle body, such as... Figure 5 As shown, the contoured shallow groove 105 has a plurality of snap-fit ends 1051, which are arranged around the edge of the contoured shallow groove 105.
[0032] Furthermore, in this application, to adapt to the installation requirements of a specific vehicle model, the second extension 103 has a second through groove 1032.
[0033] In addition, in this application, the length of the first through groove 1014 is greater than the length of the second through groove 1032, and the second through groove 1032 is located in the middle section of the first through groove 1014.
[0034] In summary, the large concave surface composite structure of the automotive interior panel based on the embodiments of this application is explained, which provides advantages such as the surface being less prone to bulging and cracking.
[0035] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from these principles.
Claims
1. A composite structure with a large concave surface for automotive interior panels, characterized in that: The automotive interior panel concave composite structure includes The substrate body has a middle portion, a first extension portion, and a second extension portion. The first extension portion and the second extension portion are respectively located on both sides of the middle portion. The middle portion has a central bulge section and two narrowing ends. The central bulge section is located between the two narrowing ends. The middle portion also has a first concave surface. The first concave surface extends from one of the narrowing ends to the other narrowing end, and the central bulge section is the bottom region of the first concave surface. The first extension portion and the second extension portion each have a first curved surface and a second curved surface. The first curved surface and the second curved surface are both smoothly transitioned to the first concave surface. One side of the substrate body is covered with a skin. The substrate body is provided with vent holes at intervals. The vent holes are located on the middle portion and the first extension portion.
2. The automotive interior panel large concave surface composite structure according to claim 1, characterized in that: The second extension has a transition protrusion on the side opposite to the middle part, and the top surface of the transition protrusion is a slope with a slope angle of less than 30°.
3. The automotive interior panel large concave surface composite structure according to claim 2, characterized in that: The substrate body has a shallow groove on the side facing away from the skin, and the edges of the skin are all folded into the shallow groove. The skin is bonded to the side of the substrate body facing away from the shallow groove.
4. The automotive interior panel large concave surface composite structure according to claim 3, characterized in that: The contoured shallow groove has several snap-fit ends, which are arranged around the edge of the contoured shallow groove.
5. The automotive interior panel large concave surface composite structure according to claim 1, characterized in that: The middle drum section has a first through groove.
6. The automotive interior panel large concave surface composite structure according to claim 5, characterized in that: The second extension has a second through groove.
7. The automotive interior panel large concave surface composite structure according to claim 6, characterized in that: The length of the first through groove is greater than the length of the second through groove, and the second through groove is located in the middle section of the first through groove.
8. The automotive interior panel large concave surface composite structure according to claim 1, characterized in that: The epidermis includes a cortical layer and a tensile fiber mesh layer, wherein the tensile fiber mesh layer is located below the cortical layer and is bonded to the cortical layer.
9. The automotive interior panel large concave surface composite structure according to claim 5, characterized in that: The distance from the edge of the first through groove away from the second extension to the lowest point of the connection between the first curved surface and the first concave surface is 50mm to 53mm.