Vehicle door plate with coating skin on surface

Abstract

According to the vehicle door plate with the covering leather on the surface, the butt joint seam is arranged on the surface of the covering leather of the vehicle door plate, and the threading seams used for decoration are arranged on the two sides of the butt joint seam, so that the structural stability and durability of a product are improved, and the appearance quality and attractiveness of the product are greatly improved; meanwhile, a millimeter-level groove texture is arranged on the surface of the coating leather, and the coating leather is in full contact with an adhesive in the bonding process of the coating leather and the decorative plate through the groove texture, so that the bonding strength is improved; the groove texture is arranged to be of the V-shaped structure, so that the sharp corner part of the V-shaped groove can form an effective mechanical anchoring point for the coating skin, the connection stability of the coating skin and the decorative plate is enhanced, the coating skin can be stressed more uniformly during attachment, the attachment degree of the coating skin and the decorative plate is effectively improved, smooth transition and attachment are achieved, and the service life of the coating skin is prolonged. And sharp corners and abrupt changes caused by stress concentration are reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive door panel technology, specifically to a door panel with a skin covering its surface. Background Technology

[0002] In modern automotive manufacturing, the wrapping process of car door interior panels has always been a crucial factor affecting the quality and aesthetics of the car's interior. Traditional door interior panel wrapping primarily involves directly covering the trim panel with textured raw leather. However, this process has several problems, specifically as follows:

[0003] 1. The original leather covering has poor adaptability to changes in the skeleton shape of the trim panel. When the skeleton shape of the trim panel has significant changes or complex curved surfaces, the original leather covering is prone to wrinkles or sharp corners, which not only affects the appearance of the product but may also lead to material fatigue due to stress concentration at the wrinkles, reducing the product's service life. At the same time, sharp corners and large rounded corners greatly reduce the aesthetics of the interior trim panel, making it difficult to meet consumers' requirements for high-quality and personalized automotive interiors.

[0004] 2. Traditional real stitching has obvious defects. After being stretched, the stitch holes of traditional real stitching tend to enlarge, and local gaps deform, affecting the integrity and aesthetics of the interior panel. It may also weaken the connection strength between the leather and the frame.

[0005] 3. The adhesion between the leather and the trim panel is poor. Simple bonding methods are not enough to achieve a firm and stable connection. Especially during long-term use, factors such as vehicle vibration and temperature changes can easily cause the leather to fall off, which not only affects the appearance of the interior but may also cause abnormal noises inside the vehicle, reducing the user's driving experience. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this utility model provides a car door panel with a covered leather surface. By having a butt joint on the surface of the covered leather and decorative threaded seams on both sides of the butt joint, the structural stability and durability of the product are improved, as well as the appearance quality and aesthetics of the product. By providing millimeter-level groove textures on the surface of the covered leather that adheres to the decorative panel, the adhesion between the covered leather and the decorative panel can be effectively improved, avoiding the phenomenon of weak adhesion.

[0007] This utility model achieves the above-mentioned technical objectives through the following technical means.

[0008] A door panel with a covering skin on its surface, wherein the covering skin is provided on the exterior of the door's decorative panel; the surface of the covering skin has a butt joint formed during the molding process, and decorative threaded seams are provided on both sides of the butt joint.

[0009] Furthermore, the seam on the covering skin is formed by the mold during the molding process.

[0010] Furthermore, a threading machine is used to drill holes on both sides of the joint to thread the thread, forming a threaded seam.

[0011] Furthermore, the joint can be one or a combination of straight lines, arcs, and curves.

[0012] Furthermore, the surface of the leather covering that is attached to the decorative panel has a millimeter-level groove texture.

[0013] Furthermore, the groove texture consists of several evenly distributed V-shaped grooves, the opening angle of the V-shaped grooves is 60-90°, the depth of the V-shaped grooves is 0.2-0.5mm, the opening width of the V-shaped grooves is 0.3-0.8mm, and the spacing between adjacent V-shaped grooves is 1.5-3.0mm.

[0014] Furthermore, the V-shaped groove and the butt joint are formed in one step using a mold.

[0015] Furthermore, the V-shaped grooves are evenly distributed along the length or width of the covering skin or along the direction of the butt joint.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. The door panel with a covered leather surface described in this utility model improves the structural stability and durability of the product, as well as its appearance and aesthetics, by having a butt joint on the covered leather surface and decorative threaded seams on both sides of the butt joint. Since the threaded seams are decorative and not true butt joints, there is no tension in the seam holes, thus avoiding the problem of seam holes easily enlarging and localized gap deformation after stretching, as seen in existing technologies.

[0018] 2. The door panel with a covered leather surface described in this utility model can effectively improve the adhesion between the covered leather and the decorative panel by providing millimeter-level groove textures on the surface of the covered leather that is attached to the decorative panel, thus avoiding the phenomenon of poor adhesion.

[0019] 3. The door panel with a covered leather surface described in this utility model has a V-shaped groove design, which can better achieve the bonding effect and make the covered leather more rounded (with a smaller arc angle) when covering the corner of the decorative panel, avoiding sharp corners and abrupt changes. Attached Figure Description

[0020] 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. The drawings described below are some embodiments of this utility model. For those skilled in the art, it is obvious that other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional view of the car door panel with a skin covering the surface as described in this utility model.

[0022] Figure 2 This is a schematic diagram showing the positions of the butt joint and threading joint described in this utility model.

[0023] Figure 3 This is a partial enlarged view of the butt joint and threading joint described in this utility model.

[0024] Figure 4 This is a schematic diagram of the groove texture described in this utility model.

[0025] In the picture:

[0026] 1-Decorative panel; 2-Covered leather; 3-Butt joint; 4-Threaded seam; 5-Groove texture; 5-1-V-shaped groove. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] like Figure 1 and Figure 2 As shown, the door panel with a covered skin described in this utility model includes a decorative panel 1, which can also be called a skeleton panel. The structure of the decorative panel 1 is an existing structure, but the door structure varies for each car model, so the position of the decorative panel 1 also varies. A covered skin 2 is provided on the outside of the decorative panel 1. The surface of the covered skin 2 has a butt joint 3 produced by the mold during the forming process. The butt joint 3 can be one or a combination of straight lines, arcs, and curves. The shape of the butt joint 3 is generally designed by the customer and varies for different car models. On both sides of the butt joint 3, there are decorative threaded seams 4. The threaded seams 4 are made by using a sewing machine to punch holes on both sides of the butt joint 3 for threading. Figure 3 As shown, this improves the product's structural stability and durability, as well as its appearance and aesthetics. Since the threaded seam is decorative and not a true butt joint, there is no tension in the thread hole, thus avoiding the problem of the thread hole easily enlarging and localized gap deformation after stretching, as seen in existing technologies.

[0031] like Figure 4 As shown, to solve the adhesion problem between the decorative panel 1 and the covering skin 2, and the problem of the large arc angle of the covering skin 2 during covering, this utility model provides a millimeter-level groove texture 5 on the surface of the covering skin 2 that is attached to the decorative panel 1. The groove texture 5 and the butt joint 3 are formed in one step by a mold. At the same time, depending on the material characteristics and decorative requirements of the covering skin 2, the groove shape of the groove texture 5 can be V-shaped or U-shaped. In the embodiment, V-shaped grooves are preferred. The groove texture 5 consists of several evenly distributed V-shaped grooves 5-1. The opening angle of the V-shaped grooves 5-1 is 60-90°, the depth of the V-shaped grooves 5-1 is 0.2-0.5mm, the opening width of the V-shaped grooves 5-1 is 0.3-0.8mm, and the spacing between adjacent V-shaped grooves 5-1 is 1.5-3.0mm.

[0032] The specific groove size can be adjusted according to design requirements to ensure that the adhesion is enhanced without negatively affecting the appearance of the covering leather. The V-shaped groove 5-1 is evenly distributed across the entire surface of the covering leather. At the same time, the density and distribution of the grooves can be locally adjusted according to the shape of the decorative panel 1. By locally increasing or decreasing the density of the grooves, the actual usage scenarios and usage needs of each area can be adapted.

[0033] V-groove 5-1 forming process: A millimeter-level groove corresponding to a raised section is pre-reserved on the surface of the forming mold; Pressing process: The covering skin 2 is placed in a heating device, such as an oven or hot press. The heating time is adjusted according to the actual situation to ensure that the covering skin 2 achieves suitable flexibility and plasticity for subsequent forming operations; After the covering skin 2 is heated to the ideal state, it is quickly and accurately placed in the forming mold, ensuring that the covering skin 2 completely covers the mold surface without air bubbles or wrinkles to guarantee the uniformity of the pressing effect. A hydraulic press, pneumatic press, or other pressing equipment is used to apply uniform and appropriate pressure to the mold. The magnitude of the pressure... The pressing duration is adjusted according to the characteristics and texture depth of the covering skin 2. Under pressure, the protrusions on the mold are imprinted onto the covering skin 2, resulting in millimeter-level groove texture 5. After pressing, in order to stabilize the shape of the groove texture 5 on the surface of the covering skin 2 and prevent springback or deformation, the covering skin 2 and the mold are cooled together while maintaining pressure. The cooling method can be natural cooling or the use of cooling equipment, such as a cooling water circulation system or an air cooling system. When the covering skin 2 has completely cooled and set, the pressure can be released, and the covering skin 2 can be removed from the mold. At this time, a stable groove texture 5 has been formed on the surface of the covering skin 2. If the forming mold contains both the protrusions for forming the groove texture 5 and the ridges for forming the butt joint 3, then the groove texture 5 and the butt joint 3 can be processed in one step.

[0034] Due to the presence of the groove texture 5, when the adhesive is filled into the millimeter-level groove texture 5, the contact area between the covering skin 2 and the decorative panel 1 can be greatly increased. During bonding, the adhesive can fully fill and penetrate into each groove texture 5, making the connection between the surface of the covering skin 2 and the decorative panel 1 more secure. Moreover, after the adhesive in the groove texture 5 cures, it forms anchor points, realizing the function of mechanical anchoring, further improving the bonding strength between the covering skin 2 and the decorative panel 1. The depth and shape of the groove texture 5 can optimize the curing effect, thereby improving the stability and reliability of the connection. When the covering skin 2 is stretched, bent, and fitted to the complex contour of the decorative panel 1, a certain amount of stress is generated. The several evenly distributed millimeter-level grooves 5 can disperse and alleviate the stress during the process of covering the decorative panel 1, so that the covering skin 2 is subjected to force more evenly when fitting the decorative panel, thereby achieving a smoother transition and fit. This effectively reduces sharp corners and abrupt changes caused by stress concentration, ensuring that the final product has smooth and natural lines. In addition, the several evenly distributed grooves 5 can also serve as guide lines to guide the direction of the covering skin 2 during the fitting process, reducing the risk of the covering skin shifting or wrinkling during the fitting process, making it easier to fit the decorative panel according to its shape and avoiding shifting or misalignment. At the same time, the grooves 5 can also promote the expulsion of air and reduce the generation of air bubbles, thereby ensuring a tight fit between the covering skin 2 and the decorative panel 1, ultimately presenting a flat and smooth surface effect.

[0035] Example 1

[0036] When the groove texture 5 consists of several evenly distributed V-shaped grooves 5-1, the opening angle of the V-shaped grooves is 60-90 degrees, the depth is 0.2-0.5 mm, the width is 0.3-0.8 mm, and the spacing is 1.5-3.0 mm. The raw leather without texture is heated to 60-80 degrees Celsius in an oven. Once the leather reaches the required temperature, it is quickly transferred to a mold, and appropriate pressure (e.g., 5-10 MPa) is applied to the mold for 30-60 seconds to improve the forming rate of the V-shaped groove texture. The pressed and formed covered leather 2 is then cooled to room temperature along with the mold. After the covered leather 2 has cooled to room temperature, adhesive is applied to allow the adhesive to fully and evenly penetrate into the V-shaped grooves. Before the adhesive cures, the covering skin 2 is bonded to the skeleton of the decorative panel 1. The V-shaped groove can effectively improve the bonding strength. After the adhesive cures, the sharp corners of the V-shaped groove can form effective mechanical anchor points, enhancing the connection stability between the covering skin and the skeleton of the decorative panel 1. At the same time, the V-shaped groove allows the covering skin 2 to transition more naturally and smoothly when it is applied, effectively avoiding various adverse phenomena caused by stress concentration. Whether it is a regular or complex shaped decorative panel 1, the V-shaped groove structure can help the covering skin 2 to bend or apply precisely according to the shape of the decorative panel 1, achieving perfect bonding with the decorative panel 1 and ensuring that the covering effect of the decorative panel 1 reaches the best state.

[0037] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0038] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. All equivalent embodiments or modifications made without departing from the spirit of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A car door panel with a covered skin on its surface, characterized in that, A wrapping skin (2) is provided on the exterior of the decorative panel (1) of the car door; the surface of the wrapping skin (2) has a butt joint (3) generated during the molding process, and decorative threaded seams (4) are provided on both sides of the butt joint (3).

2. The door panel with a covered skin as described in claim 1, characterized in that, The butt joint (3) on the covering skin (2) is formed by the mold during the molding process.

3. The door panel with a covered skin as described in claim 1, characterized in that, By using a threading machine to drill holes on both sides of the butt joint (3) to thread the thread, a threaded seam (4) is formed.

4. The door panel with a covered skin as described in claim 1, characterized in that, The joint (3) is one or a combination of straight lines, arcs, and curves.

5. The door panel with a covered skin as described in claim 1, characterized in that, The surface of the covering leather (2) that is attached to the decorative panel (1) is provided with millimeter-level groove texture (5).

6. The door panel with a covered skin as described in claim 5, characterized in that, The groove texture (5) consists of several evenly distributed V-shaped grooves (5-1), the opening angle of the V-shaped grooves (5-1) is 60-90°, the depth of the V-shaped grooves (5-1) is 0.2-0.5mm, the opening width of the V-shaped grooves (5-1) is 0.3-0.8mm, and the spacing between adjacent V-shaped grooves (5-1) is 1.5-3.0mm.

7. The door panel with a covered skin surface according to claim 6, characterized in that, The V-shaped groove (5-1) and the butt joint (3) are formed in one step by a mold.

8. The door panel with a covered skin surface according to claim 6, characterized in that, The V-shaped grooves are evenly distributed along the length or width of the covering skin or along the butt joint (3).

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