A soft and hard rubber combined structure of a vehicle plastic part and a vehicle
By forming an L-shaped cross-sectional overlap surface with a recessed first overlap platform on the edge of the hard rubber body and a second overlap platform of the soft rubber body, and forming a sealing groove on the outer surface of the hard rubber, the problems of insufficient tear strength and uneven appearance of the soft and hard rubber bonding structure of vehicle plastic parts are solved, achieving high-performance sealing and exquisite appearance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG SMART INTELLIGENCE TECH CO LTD
- Filing Date
- 2025-04-22
- Publication Date
- 2026-06-16
AI Technical Summary
The soft and hard plastic bonding structure of vehicle plastic parts has insufficient tear resistance, uneven bonding, poor appearance and texture, and cannot meet the requirements for sealing and styling.
The hard plastic body has a first recessed overlapping platform on its edge, and the soft plastic body has a second overlapping platform that overlaps with it, forming an L-shaped cross-sectional overlapping surface. A sealing groove is formed on the outer surface of the hard plastic body, and the hard plastic and soft plastic are combined through a two-color injection molding process.
It improves the tear resistance of both hard and soft rubber, ensuring the diversity of shapes and exquisite appearance, while achieving good sealing and matching.
Smart Images
Figure CN224360553U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of two-color injection molding technology, and more specifically, to a soft and hard adhesive bonding structure for vehicle plastic parts and a vehicle. Background Technology
[0002] Vehicle plastic parts often exhibit various structural forms. Some of these parts utilize two-color injection molding to achieve a combination of soft and hard plastics, fulfilling functional requirements and enabling sealing or fitting. The hard plastic serves as the component's skeleton, while the soft plastic allows for connection with surrounding parts. This combination of soft and hard plastics takes several forms: First, a two-color injection molding method where the soft plastic edge is tightly joined to the hard plastic body; second, a method where the soft edge is welded to the edge of the skeleton, precisely welding or fixing the soft plastic material to the edge of the hard plastic skeleton; and third, a method where the soft edge completely covers the skeleton, with the soft plastic material fully covering the surface of the hard plastic skeleton, and potentially extending outwards.
[0003] Currently, the structural forms of combining soft and hard plastics in vehicle parts have many defects. Specifically, one type, where soft and hard plastics are joined through two-color injection molding, suffers from weak bonding due to the small contact area. The maximum tear strength between the soft and hard plastics in this design is only 40N, leading to cracking after exposure to high temperatures and sunlight. Another type involves welding the soft edge to the edge of the frame body. The soft edge is molded separately, and then welded to the hard plastic body using welding posts. This results in poor texture, uneven bonding between the soft and hard plastics, and an unsatisfactory appearance. A third type involves the soft edge completely covering the frame body. While this provides good bonding, it severely affects the styling surface, its texture, and color, failing to achieve the desired effect of a narrow soft edge around the part with a hard plastic texture in the center of the frame body.
[0004] Therefore, there is an urgent need for those skilled in the art to provide a bonding structure for vehicle plastic soft and hard plastics to solve the quality problem of insufficient tear strength in the bonding of soft and hard plastic parts, resulting in detachment; uneven fit between the soft and hard plastic bodies, poor appearance and texture; failure to meet the styling requirements of hard plastic parts; and the technical problem of achieving good sealing or matching between soft plastic parts and vehicle peripheral parts. Utility Model Content
[0005] The purpose of this application is to provide a soft and hard adhesive bonding structure for vehicle plastic parts to solve the above-mentioned technical problems.
[0006] To achieve the above objectives, this application adopts the following technical solution:
[0007] This application provides a soft and hard plastic bonding structure for a vehicle plastic part, including: a hard plastic body with a first overlapping platform recessed at its edge relative to the outer surface of the hard plastic body; a soft plastic body disposed on the edge of the hard plastic body, the soft plastic body having a second overlapping platform overlapping the first overlapping platform, a portion of the second overlapping platform overlapping the outer surface of the first overlapping platform, the width of the portion being smaller than the width of the first overlapping platform, thereby forming a sealing groove in the space where the first overlapping platform is recessed relative to the outer surface of the hard plastic body.
[0008] In some technical solutions of this application, the first overlapping platform includes a first overlapping surface corresponding to the outer surface of the hard plastic body and a second overlapping surface corresponding to the thickness direction of the hard plastic body, and the second overlapping platform includes a third overlapping surface corresponding to the outer surface of the hard plastic body and a fourth overlapping surface corresponding to the thickness direction of the hard plastic body. The first overlapping surface and the third overlapping surface overlap, and the second overlapping surface and the fourth overlapping surface overlap.
[0009] Furthermore, the cross-section connecting the first lap surface and the second lap surface is L-shaped.
[0010] Furthermore, the cross-section connecting the third and fourth overlapping surfaces is L-shaped.
[0011] Furthermore, the width of the first overlapping surface is greater than the width of the third overlapping surface, and the width of the second overlapping surface is equal to the width of the fourth overlapping surface.
[0012] Furthermore, the first and third overlapping surfaces are parallel to the outer surface of the rigid plastic body.
[0013] Furthermore, the second and fourth overlapping surfaces are perpendicular to the outer surface of the rigid plastic body.
[0014] Furthermore, the overlap width of the first and third overlapping surfaces is similar to the overlap width of the second and fourth overlapping surfaces.
[0015] Furthermore, the overlap width of the first and third overlapping surfaces is not less than 5mm, as is the overlap width of the second and fourth overlapping surfaces.
[0016] In some technical solutions of this application, the sealing groove is formed by the height difference between the first overlapping surface and the outer surface of the hard plastic body, and the width difference between the portion of the second overlapping platform overlapping the outer surface of the first overlapping platform and the first overlapping platform.
[0017] Furthermore, the bottom of the sealing groove is the outer surface of the first overlapping platform, and the two sides are the height difference surface between the first overlapping surface and the outer surface of the hard plastic body, and the side wall of the second overlapping platform, respectively.
[0018] Furthermore, the width of the two sides of the sealant groove cross-section is no more than 1.4mm.
[0019] In some of the technical solutions of this application, the outer surface of the hard plastic body and the outer surface of the soft plastic body are on the same plane.
[0020] In some of the technical solutions of this application, the hard plastic body and the soft plastic body are joined by a two-color injection molding process.
[0021] This application also provides a vehicle plastic part, including the aforementioned vehicle plastic part with a soft and hard adhesive bonding structure.
[0022] This application also provides a vehicle including the aforementioned soft and hard adhesive bonding structure for vehicle plastic parts.
[0023] This application discloses a hard-soft plastic bonding structure for vehicle plastic parts. A first overlapping platform is provided at the edge of the hard plastic body, and a second overlapping platform is provided at the edge of the hard plastic body, overlapping with the first overlapping platform. The second overlapping platform overlaps the outer surface of the first overlapping platform, forming an L-shaped overlapping surface. This satisfies the tear resistance requirements between the hard plastic body and the soft plastic body, effectively improving product performance. Simultaneously, the outer surfaces of the hard plastic body and the soft plastic body are on the same shaped surface, allowing for various textured effects on the outer surface of the hard plastic body while maintaining the shaped surface requirements. Furthermore, the width of the second overlapping platform is smaller than the width of the first overlapping platform, forming a sealing groove, ensuring uniform fit between the hard plastic body and the surrounding soft plastic body, maintaining a refined appearance. The soft plastic body achieves good sealing or matching between the vehicle plastic part and surrounding components. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the soft and hard adhesive bonding structure of the vehicle plastic parts provided in the embodiments of this application.
[0025] Figure 2 for Figure 1 The exploded structural diagram of the soft and hard adhesive bonding structure of the vehicle plastic parts provided in the diagram.
[0026] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of section AA.
[0027] Figure 4 for Figure 3 A schematic diagram of the structure of the medium-hard rubber body.
[0028] Figure 5 for Figure 3 A schematic diagram of the structure of a medium-soft colloid.
[0029] The numbers in the diagram are: 1. Hard plastic body, 11. First overlapping platform, 111. First overlapping surface, 112. Second overlapping surface, 2. Soft plastic body, 21. Second overlapping platform, 211. Third overlapping surface, 212. Fourth overlapping surface, 3. Sealing groove. Detailed Implementation
[0030] The present application will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that for those skilled in the art, any modifications to the present application in various equivalent forms without departing from the principles of the present application fall within the scope defined by the appended claims.
[0031] In the description of this application, it should be understood that the terms "one end," "end," "outer," "inner," "surface," "bottom," "both sides," "inner side," "outer side," "between," "edge," "around," "vertical," and "parallel," 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 application 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 limiting the scope of protection of this application. Furthermore, the terms "first," "second," etc., 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, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.
[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "setting," "connection," "joining," and "lap" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.
[0033] This application provides a soft and hard plastic bonding structure for vehicle plastic parts, solving the defects in the bonding of soft and hard plastics in vehicle plastic parts. While the hard plastic overlaps with a soft plastic layer of equal width, the tear resistance after bonding is insufficient. Simultaneously, the surface of the hard plastic skeleton can be textured, and a ring of soft plastic of equal width overlaps the hard plastic, ensuring uniform fit between the soft and hard plastic layers and guaranteeing a refined appearance and styling requirements for the vehicle plastic parts. The soft plastic achieves good sealing or matching between the vehicle plastic parts and surrounding components. The use of a two-color injection molding process reduces the cost of secondary assembly of the hard and soft plastics.
[0034] This application proposes a soft and hard adhesive bonding structure for vehicle plastic parts. The soft and hard adhesive bonding structure for vehicle plastic parts will be described in detail below with reference to the specific drawings.
[0035] like Figure 1 and Figure 2 As shown, this application embodiment provides a soft and hard plastic bonding structure for a vehicle plastic part, including a first overlapping platform 11 recessed relative to the outer surface of the hard plastic body 1 at its edge; a soft plastic body 2 disposed on the edge of the hard plastic body 1 and having a second overlapping platform 21 overlapping the first overlapping platform 11; a portion of the second overlapping platform 21 overlaps the outer surface of the first overlapping platform 11, and the width of this portion is smaller than the width of the first overlapping platform 11, thereby forming a sealing groove 3 in the space where the first overlapping platform 11 is recessed relative to the outer surface of the hard plastic body 1.
[0036] like Figure 4 As shown, regarding the structure of the first overlapping platform 11, as an example, the first overlapping platform 11 includes a first overlapping surface 111 corresponding to the outer surface of the rigid plastic body 1 and a second overlapping surface 112 corresponding to the thickness direction of the rigid plastic body 1. The cross-section connecting the first overlapping surface 111 and the second overlapping surface 112 is L-shaped.
[0037] like Figure 5 As shown, regarding the structure of the second overlapping platform 21, as an example, the second overlapping platform 21 includes a third overlapping surface 211 corresponding to the outer surface of the rigid plastic body 1 and a fourth overlapping surface 212 corresponding to the thickness direction of the rigid plastic body 1. The cross-section connecting the third overlapping surface 211 and the fourth overlapping surface 212 is L-shaped.
[0038] Specifically, the first overlapping surface 111 and the third overlapping surface 211 overlap, and the second overlapping surface 112 and the fourth overlapping surface 212 overlap. The first overlapping surface 111 and the third overlapping surface 211 are parallel to the outer surface of the hard plastic body 1, and the second overlapping surface 112 and the fourth overlapping surface 212 are perpendicular to the outer surface of the hard plastic body 1.
[0039] Furthermore, the width of the first overlapping surface 111 is greater than the width of the third overlapping surface 211, and the width of the second overlapping surface 112 is equal to the width of the fourth overlapping surface 212. The overlap width of the first overlapping surface 111 and the third overlapping surface 211 is similar to the overlap width of the second overlapping surface 112 and the fourth overlapping surface 212, preferably not less than 5mm. The first overlapping surface 111 and the third overlapping surface 211 overlap, and the second overlapping surface 112 and the fourth overlapping surface 212 overlap to form an L-shaped overlapping surface. The height and width of the first overlapping surface 111 and the second overlapping surface 112 cover an overlap of not less than 5mm. The tear force between the hard plastic body 1 and the soft plastic body 2 can reach 200N. Especially after exposure to high temperature and sunlight, the L-shaped overlapping surface can meet the tear force performance requirements between the hard plastic body 1 and the soft plastic body 2, effectively improving product performance.
[0040] like Figure 3As shown, regarding the structure of the sealing groove 3, as an example, the sealing groove 3 is formed by the height difference between the first overlapping surface 111 and the outer surface of the rigid plastic body 1, and the width difference between the portion of the second overlapping platform 21 overlapping the outer surface of the first overlapping platform 11 and the first overlapping platform 11. The bottom of the sealing groove 3 is the outer surface of the first overlapping platform 11, and the two sides are the height difference surface between the first overlapping surface 111 and the outer surface of the rigid plastic body 1, and the sidewall of the second overlapping platform 21, respectively.
[0041] Furthermore, the width of the two sides of the sealing groove 3 is no more than 1.4mm. A sealing groove 3 of equal width is designed at the joint between the hard plastic body 1 and the soft plastic body 2 to avoid burrs and flash at the junction of the hard and soft plastics, thus improving the refinement of the product's appearance. The width of the sealing groove 3 ensures the process requirements of injection molding sealing, resulting in a refined appearance of the product.
[0042] Specifically, the hard plastic body 1 and the soft plastic body 2 are joined together using a two-color injection molding process to form a single vehicle plastic part. The outer surfaces of the hard plastic body 1 and the soft plastic body 2 are on the same plane. The outer surface of the hard plastic body 1 can achieve various textured effects while maintaining the required surface shape, while the soft plastic body 2 ensures a good seal or fit between the vehicle plastic part and surrounding vehicle components.
[0043] This application also provides a vehicle plastic part, including the aforementioned vehicle plastic part with a soft and hard adhesive bonding structure.
[0044] This application also provides a vehicle including the aforementioned soft and hard adhesive bonding structure for vehicle plastic parts.
[0045] This application discloses a rigid-soft plastic bonding structure for vehicle plastic parts. A first overlapping platform 11 is provided at the edge of the rigid plastic body 1. A soft plastic body 2 is disposed at the edge of the rigid plastic body 1 and has a second overlapping platform 21 that overlaps with the first overlapping platform 11. The second overlapping platform 21 overlaps the outer surface of the first overlapping platform 11, forming an L-shaped overlapping surface. This satisfies the tear resistance requirements between the rigid plastic body 1 and the soft plastic body 2, effectively improving product performance. Simultaneously, the outer surfaces of the rigid plastic body 1 and the soft plastic body 2 are on the same molding surface, allowing for various textured effects on the outer surface of the rigid plastic body, maintaining the molding surface requirements. Furthermore, the width of the second overlapping platform 21 is smaller than the width of the first overlapping platform 11, forming a sealing groove, ensuring uniform fit between the rigid plastic body 1 and the soft plastic body 2, maintaining a refined appearance. The soft plastic body 2 achieves good sealing or matching between the vehicle plastic part and surrounding components. The use of a two-color injection molding process reduces the cost of secondary assembly of the rigid plastic body 1 and the soft plastic body 2.
[0046] This application discloses a soft and hard plastic bonding structure for vehicle plastic parts based on a two-color injection molding method for bonding soft and hard plastics. Furthermore, the design values in the aforementioned structure, regardless of their magnitude, include the L-shaped overlap of the sealing groove, the soft plastic body, and the hard plastic body, as well as the coverage overlap and butt joint overlap. All of these aspects are within the scope of this patent.
[0047] The above description of the embodiments disclosed in this application enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A soft and hard adhesive bonding structure for vehicle plastic parts, characterized in that, include: The rigid plastic body (1) has a first overlapping platform (11) at its edge that is recessed relative to the outer surface of the rigid plastic body (1). A soft gel body (2) is disposed on the edge of the hard gel body (1). The soft gel body (2) is provided with a second overlapping platform (21) that overlaps with the first overlapping platform (11). A portion of the second overlapping platform (21) overlaps the outer surface of the first overlapping platform (11). The width of this portion is smaller than the width of the first overlapping platform (11), thereby forming a sealing groove (3) in the space where the first overlapping platform (11) is recessed relative to the outer surface of the hard gel body (1).
2. The soft and hard adhesive bonding structure for vehicle plastic parts according to claim 1, characterized in that, The first overlapping platform (11) includes a first overlapping surface (111) corresponding to the outer surface of the hard plastic body (1) and a second overlapping surface (112) corresponding to the thickness direction of the hard plastic body (1). The second overlapping platform (21) includes a third overlapping surface (211) corresponding to the outer surface of the hard plastic body (1) and a fourth overlapping surface (212) corresponding to the thickness direction of the hard plastic body (1). The first overlapping surface (111) overlaps with the third overlapping surface (211), and the second overlapping surface (112) overlaps with the fourth overlapping surface (212).
3. The soft and hard adhesive bonding structure for vehicle plastic parts according to claim 2, characterized in that, The width of the first overlapping surface (111) is greater than the width of the third overlapping surface (211), and the width of the second overlapping surface (112) is equal to the width of the fourth overlapping surface (212).
4. The soft and hard adhesive bonding structure for vehicle plastic parts according to claim 3, characterized in that, The first overlapping surface (111) and the third overlapping surface (211) are parallel to the outer surface of the hard plastic body (1).
5. The soft and hard adhesive bonding structure for vehicle plastic parts according to claim 3, characterized in that, The overlap width of the first overlap surface (111) and the third overlap surface (211) is similar to the overlap width of the second overlap surface (112) and the fourth overlap surface (212).
6. The soft and hard adhesive bonding structure for vehicle plastic parts according to claim 2, characterized in that, The sealing groove (3) is formed by the height difference between the first overlapping surface (111) and the outer surface of the hard plastic body (1) and the width difference between the portion of the second overlapping platform (21) overlapping the outer surface of the first overlapping platform (11) and the first overlapping platform (11).
7. The soft and hard adhesive bonding structure for vehicle plastic parts according to claim 6, characterized in that, The bottom of the sealing groove (3) is the outer surface of the first overlapping platform (11), and the two sides are the height difference surface of the first overlapping surface (111) and the outer surface of the hard plastic body (1) and the side wall of the second overlapping platform (21), respectively.
8. The soft and hard adhesive bonding structure for vehicle plastic parts according to claim 1, characterized in that, The outer surface of the hard plastic body (1) and the outer surface of the soft plastic body (2) are on the same plane.
9. The soft and hard adhesive bonding structure for vehicle plastic parts according to claim 1, characterized in that, The hard plastic body (1) and the soft plastic body (2) are joined together using a two-color injection molding process.
10. A vehicle, characterized in that, The soft and hard adhesive bonding structure includes any one of the vehicle plastic parts described in claims 1-9.