Multi-color injection-molded vehicle trim and vehicle comprising same

Abstract

The present disclosure relates to a multi-color injection-molded vehicle trim and a vehicle comprising same. The vehicle trim comprises a skeleton layer and a skin layer covering the skeleton layer. The skeleton layer is a hard plastic material layer. The skin layer is a soft plastic material layer. The skin layer has an edge region adjacent to a boundary of the vehicle trim, and at least a part of the edge region has a reduced thickness compared with the remaining regions of the skin layer other than the edge region. By structurally improving a boundary region of the trim, molding flash is effectively avoided, thereby ensuring the appearance.

Description

Multi-color injection molded vehicle trim parts and vehicles including them Technical Field

[0001] This disclosure relates to the field of vehicle component technology. More specifically, this disclosure relates to a multi-color injection-molded vehicle trim piece, and to a vehicle including such trim piece. Background Technology

[0002] For soft, two-color injection molded vehicle trim parts, the first injection is typically made of hard plastic, and the second injection is made of soft plastic. Soft plastic generally has a much higher flowability than hard plastic, and its position typically forms the surface of the trim. In terms of the molding process, during the second injection, the hard plastic skeleton from the first injection has already formed and is located on the fixed mold, while the cavity for the second injection is located on the moving mold. Therefore, the boundary between the fixed and moving molds inevitably forms a parting line at the boundary of the soft plastic skin formed in the second injection. Furthermore, there is an unavoidable gap between the fixed and moving molds, making the molded vehicle trim parts highly susceptible to flash (excess material) at the parting line. In particular, the higher the flowability of the soft plastic, the more severe the flash defect. For multi-color injection molded vehicle parts, if a soft plastic skin layer exists, the same flash problem will occur.

[0003] In existing technologies, as described in patent document CN218519053U, a local anti-reverse mechanism can be designed on the mold. This can increase the local clamping force without changing the overall clamping force of the mold, thereby reducing flash and burrs. However, the design and manufacturing of molds are usually complex and costly. Alternatively, the product's structural design can be used to shield potential flash and burr areas at boundaries using a support component. However, this method is limited by the position and structure of the support component and is not conducive to precise implementation.

[0004] The purpose of this disclosure is to provide a multi-color injection-molded vehicle trim that effectively avoids flash and overflow caused by injection molding of soft plastic materials by improving the structure of its own boundary area, thus ensuring aesthetics.

[0005] To this end, a first aspect of this disclosure provides a multi-color injection-molded vehicle trim, including a skeleton layer and a skin layer covering the skeleton layer, the skeleton layer being a hard plastic material layer and the skin layer being a soft plastic material layer, wherein the skin layer has an edge region adjacent to the boundary of the vehicle trim, at least a portion of the edge region having a reduced thickness compared to the remaining area of ​​the skin layer excluding the edge region.

[0006] Therefore, by thinning the edge area of ​​the skin layer, the material of the skin layer can be cooled and formed in that edge area more quickly, thereby preventing flash at the parting line.

[0007] Based on the above-described technical concept, this disclosure may further include any one or more of the following alternative forms.

[0008] In some alternative configurations, the vehicle trim is configured such that the top surface of the skin layer forms a smooth appearance.

[0009] In some alternative configurations, the vehicle trim is configured such that the boundary of the skin layer is flush with the boundary of the skeleton layer to form the boundary of the trim as a whole, or such that the boundary of the skeleton layer forms the boundary of the vehicle trim separately.

[0010] In some alternative forms, the skin layer is made of thermoplastic elastomer material or polyvinyl chloride.

[0011] In some alternative forms, the material of the skin layer is a polystyrene-based thermoplastic elastomer, a thermoplastic polyurethane elastomer, a thermoplastic polyester elastomer, a thermoplastic polyamide elastomer, or a thermoplastic polyolefin.

[0012] In some alternative forms, the material of the skeleton layer is polycarbonate, engineering plastic alloy, polypropylene, polyethylene, acrylonitrile-styrene-butadiene copolymer, nylon, resin-modified filler / reinforcing material, or natural fiber.

[0013] In some alternative forms, the thickness of the edge region gradually decreases in the direction from the center of the vehicle trim toward the boundary of the vehicle trim.

[0014] In some alternative forms, the thickness of the edge region varies linearly, nonlinearly with a gradually increasing rate of change, or nonlinearly with a gradually decreasing rate of change in the direction from the center of the vehicle trim toward the boundary of the vehicle trim.

[0015] In some alternative forms, the thickness of the edge region at its starting position in the direction from the center of the vehicle trim toward the boundary of the vehicle trim is between 0.5 mm and 3 mm, and / or the thickness of the edge region at its ending position in the direction from the center of the vehicle trim toward the boundary of the vehicle trim is between 0.2 mm and 2 mm.

[0016] In some alternative forms, the edge region has a thickness of 1 mm at its starting position in the direction from the center of the vehicle trim toward the boundary of the vehicle trim, and / or the edge region has a thickness of 0.3 mm at its ending position in the direction from the center of the vehicle trim toward the boundary of the vehicle trim.

[0017] In some alternative forms, the length of the edge region in the direction from the center of the vehicle trim toward the boundary of the vehicle trim is between 30 mm and 60 mm.

[0018] In some alternative forms, the edge region has a length of 40 mm in the direction from the center of the vehicle trim toward the boundary of the vehicle trim.

[0019] In some alternative forms, the skeleton layer is provided with at least one protruding structure that protrudes toward the skin layer, the projection of the at least one protruding structure along the thickness direction of the vehicle trim located in the edge region.

[0020] In some alternative forms, the protruding structure has a triangular, square, or arcuate cross-sectional shape in a plane formed by the direction from the center of the vehicle trim toward the boundary of the vehicle trim and the thickness direction of the vehicle trim.

[0021] In some alternative forms, the cross-sectional shape is symmetrical.

[0022] In some alternative forms, the protrusion height of the protrusion structure is between 0.2 mm and 2.5 mm, and / or the thickness of the epidermis, excluding the edge region, is between 0.5 mm and 3 mm.

[0023] In some alternative forms, the protrusion height of the protrusion structure is 0.3 mm, 0.4 mm, or 0.5 mm, and / or the thickness of the epidermis, excluding the edge region, is 1 mm.

[0024] In some alternative forms, the skeleton layer is provided with a plurality of protruding structures arranged sequentially in a direction from the center of the vehicle trim toward the boundary of the vehicle trim.

[0025] In some alternative forms, the plurality of protrusions have the same protrusion height, or the protrusion height of the plurality of protrusions increases sequentially in the direction from the center of the vehicle trim toward the boundary of the vehicle trim.

[0026] In some alternative forms, the skeleton layer is provided with a protrusion extending outward from the edge region in a direction from the center of the vehicle trim toward the boundary of the vehicle trim, the protrusion height of the protrusion being greater than or equal to the maximum thickness of the edge region.

[0027] In some alternative forms, the protrusion height of the protrusion is equal to the maximum thickness of the edge region, such that the top of the protrusion is flush with the top surface of the epidermis to jointly form a smooth appearance surface.

[0028] In some alternative forms, the protrusion height of the protrusion is at least 0.3 mm greater than the maximum thickness of the edge region.

[0029] In some alternative forms, the protrusion height of the protrusion is between 0.5 mm and 3 mm.

[0030] In some alternative versions, the protrusion height of the protrusion is 1 mm.

[0031] A second aspect of this disclosure provides a vehicle including a multi-color injection-molded vehicle trim according to a first aspect of this disclosure.

[0032] In some alternative forms, the vehicle trim is the vehicle's dashboard, door panel, sub-dashboard, door frame trim, or seat trim. Attached Figure Description

[0033] Other features and advantages of this disclosure will be better understood through the following detailed description of preferred embodiments in conjunction with the accompanying drawings. In the drawings, the same reference numerals denote the same or similar parts.

[0034] Figure 1A is a schematic diagram of a vehicle including vehicle trim according to an embodiment of the present disclosure.

[0035] Figure 1B is a schematic diagram of the internal structure of the vehicle shown in Figure 1A.

[0036] Figure 2A is a perspective view of a vehicle trim piece with overflow trim.

[0037] Figure 2B is a perspective view of the vehicle trim piece in Figure 2A from another angle.

[0038] Figure 3A is a schematic diagram of the overall structure of a vehicle trim piece.

[0039] Figure 3B is a cross-sectional view taken along plane AA in Figure 2A.

[0040] Figure 3C is an enlarged view of region P in Figure 3B.

[0041] Figures 4 to 14 show partial cross-sectional views of the first to eleventh embodiments of the vehicle trim according to the present disclosure.

[0042] The elements in the accompanying drawings are shown for simplicity and clarity and are not necessarily drawn to precise scale or shape. It should be understood that the drawings are not only used for explanation and illustration of this disclosure, but also, where necessary, to limit this disclosure. Detailed Implementation

[0043] The implementation and use of specific embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely illustrative of particular ways of implementing and using this disclosure, and are not intended to limit the scope of this disclosure.

[0044] In this document, the directional terms such as "up," "down," "top," and "bottom," used to describe the structural positions of various components, are not absolute but relative. For example, these directional descriptions are appropriate when the components are arranged as shown in the figures, but they should change accordingly when the positions of the components change. Furthermore, in this document and the accompanying figures, direction D represents the direction from the inside out relative to the vehicle trim, that is, from the center of the vehicle trim towards its boundary, and is also the material flow direction during the molding of the skin layer of the vehicle trim.

[0045] As shown in Figures 1A and 1B, the multi-color injection-molded vehicle trim with anti-overflow flash structure according to this disclosure is installed inside the vehicle V, and is mainly used in, but not limited to, the following vehicle interior products: instrument panel IP, door panel DP, sub-instrument panel CS, door frame trim DFT, seat trim ST, etc. This disclosure does not limit the specific type of the vehicle trim.

[0046] As shown in Figures 2A, 2B, and 3A to 3C, the vehicle trim T is formed by two-color injection molding. The first injection is the skeleton layer 10, i.e., a hard plastic material layer, and the second injection is the skin layer 20, i.e., a soft plastic material layer, covering the skeleton layer 10. The top surface of the skin layer 20 forms the smooth appearance surface of the vehicle trim T. In the boundary region B of the vehicle trim T, under the ideal state shown in Figure 3C, the boundary 11 of the skeleton layer 10 is flush with the boundary 21 of the skin layer 20. However, as mentioned earlier, the flowability of the soft plastic material of the skin layer 20 is much greater than that of the hard plastic material of the skeleton layer 10. Because a parting line is formed between the boundary 11 of the skeleton layer 10 and the boundary 21 of the skin layer 20, and because there is inevitably a gap between the fixed mold and the moving mold, the molded product is very prone to flash (FH) at the parting line position, which affects the aesthetics.

[0047] Therefore, in the soft two-tone injection molded vehicle trim according to this disclosure, flash at the parting line position is prevented by reducing the thickness of the edge region of the skin layer 20 adjacent to the boundary of the trim. More specifically, for the edge region of the skin layer 20 located at its end in the material flow direction (i.e., direction D) during molding, at least a portion of the edge region has a reduced thickness compared to the rest of the skin layer 20, and correspondingly, the region of the skeleton layer 10 opposite to the edge region has a increased thickness compared to the rest of the skeleton layer 10.

[0048] Several different embodiments of the vehicle trim according to the present disclosure are described below with the aid of Figures 4 to 14. It will be understood that, similar to Figure 3C, Figures 4 to 14 are shown as partial cross-sectional views taken along a plane formed by direction D and the thickness direction of the vehicle trim.

[0049] First Embodiment

[0050] As shown in Figure 4, in this soft, two-tone injection-molded vehicle trim, near the boundary of the trim, in direction D, the thickness of the edge region of the skeleton layer 10 gradually increases, while the thickness of the edge region of the skin layer 20 (i.e., the region between the starting point 22 of the thickness change of the skin layer 20 and the boundary 21 of the skin layer 20) gradually decreases. This ensures that the top surface 23 of the skin layer 20 remains a smooth surface, and the boundary 21 of the skin layer 20 is flush with the boundary 11 of the skeleton layer 10 to form the boundary of the trim as a whole. In the first embodiment, the thickness of the edge region of the skin layer 20 gradually decreases linearly in direction D, meaning that the segment 24a of the bottom surface 24 of the skin layer 20 located in the edge region is an inclined straight line in the cross-section shown. The skeleton layer 10 is made of PC (polycarbonate) material, or it can be made of PC / ABS (engineering plastic alloy), PP (polypropylene), PE (polyethylene), ABS (acrylonitrile-styrene-butadiene copolymer), nylon materials, resin-modified filler / reinforcing materials, or natural fibers (such as hemp fiber, bamboo fiber, coconut shell fiber, etc.). The skin layer 20 is made of TPE (thermoplastic elastomer) material or PVC (polyvinyl chloride), or it can be made of TPS (thermoplastic polystyrene elastomer), TPU (thermoplastic polyurethane elastomer), TPEE (thermoplastic polyester elastomer), TPAE (thermoplastic polyamide elastomer), or TPO (thermoplastic polyolefin). Preferably, in direction D, the thickness of the edge region of the skin layer 20 at the beginning position (i.e., the thickness change start position 22) is approximately 1 mm, the thickness of the edge region of the skin layer 20 at the end position (i.e., the boundary 21) is approximately 0.3 mm, and the length of the edge region of the skin layer 20 (i.e., the length from the thickness change start position 22 to the boundary 21) is approximately 40 mm. Specifically, the dimensional data can be adjusted accordingly for different soft plastic materials. For example, in direction D, the thickness of the edge region of the skin layer 20 at the beginning position can be between 0.5 mm and 3 mm, and / or, the thickness of the edge region of the skin layer 20 at the end position can be between 0.2 mm and 2 mm, while the length of the edge region of the skin layer 20 can be between 30 mm and 60 mm. Thus, by gradually thinning the thickness of the edge region of the skin layer 20, the cooling and molding of the material of the skin layer 20 in the edge region can be accelerated, thereby preventing flash and burrs at the parting line.

[0051] Second Embodiment

[0052] As shown in Figure 5, in the second embodiment, the thickness of the edge region of the skin layer 20 gradually decreases in a non-linear manner with a gradually increasing rate of change in direction D. That is, the segment 24a of the bottom surface 24 of the skin layer 20 located in the edge region is curved in the cross-section shown, and the outward convex direction of the curve is towards the skeleton layer 10. The remaining structure of the vehicle trim in this second embodiment is the same as that in the first embodiment.

[0053] Third Embodiment

[0054] As shown in Figure 6, in the third embodiment, the thickness of the edge region of the skin layer 20 gradually decreases in a non-linear manner with a gradually decreasing rate of change in direction D. That is, the segment 24a of the bottom surface 24 of the skin layer 20 located in the edge region is curved in the cross-section shown, and the outward convex direction of the curve is towards the skin layer 20. The remaining structure of the vehicle trim in this third embodiment is the same as that in the first embodiment.

[0055] Fourth embodiment

[0056] As shown in Figure 7, in this soft, two-tone injection-molded vehicle trim, at least one protruding structure 24b is provided on the skeleton layer 10 near the boundary of the trim, protruding towards the skin layer 20. The projection of the at least one protruding structure 24b along the thickness direction of the vehicle trim is located within the edge region of the skin layer 20. Preferably, the skeleton layer 10 is provided with a plurality of protruding structures 24b arranged sequentially in direction D. The top of the protruding structure 24b does not exceed the top surface 23 of the skin layer 20, which causes the thickness of the edge region of the skin layer 20 (i.e., the region between the starting position 22 of the thickness change of the skin layer 20 and the boundary 21 of the skin layer 20) to decrease at the location of the protruding structure 24b. The top surface 23 of the skin layer 20 remains a smooth appearance surface, and the boundary 21 of the skin layer 20 is flush with the boundary 11 of the skeleton layer 10 to form the boundary of the trim as a whole. In the fourth embodiment, the skeleton layer 10 is provided with three protruding structures 24b arranged sequentially in direction D, and in the cross-section shown, these three protruding structures 24b have a symmetrical triangular cross-sectional shape with the same size and shape. It is understood that the size and shape of the three protruding structures 24b can also be set differently. The skeleton layer 10 is made of PC material, for example, or it can be made of PC / ABS, PP, PE, ABS, nylon, resin-modified filler / reinforced material, or natural fiber (e.g., hemp fiber, bamboo fiber, coconut shell fiber, etc.). The skin layer 20 is made of TPE material or PVC, for example, or it can be made of TPS, TPU, TPEE, TPAE, or TPO. Preferably, the same protrusion height of the three triangular protruding structures 24b (i.e., the height L1 from the bottom surface 24 of the skin layer 20 to the top of the protruding structure 24b) is about 0.5 mm, and the thickness of the skin layer 20 except for the edge area (i.e., the thickness at the thickness change starting position 22) is about 1 mm. Specifically, the dimensional data can be adjusted accordingly for different soft plastic materials, and the triangular cross-section of the protruding structure 24b can be set to asymmetry. For example, the protrusion height of the triangular protruding structure 24b can be between 0.2 mm and 2.5 mm, and / or, the thickness of the skin layer 20, excluding the edge region, can be between 0.5 mm and 3 mm. Thus, by reducing the thickness of the edge region of the skin layer 20 in specific layers, the cooling and molding of the material of the skin layer 20 in the edge region can be accelerated, thereby preventing flash and burrs at the parting line.

[0057] Fifth Embodiment

[0058] As shown in Figure 8, in the fifth embodiment, the skeleton layer 10 is provided with three protruding structures 24b arranged sequentially in direction D. In the cross-section shown, these three protruding structures 24b have the same symmetrical triangular cross-sectional shape, and the protrusion heights of these three triangular protruding structures 24b increase sequentially in direction D, for example, approximately 0.3 mm, approximately 0.4 mm, and approximately 0.5 mm, respectively. The remaining construction of the vehicle trim in this fifth embodiment is the same as in the fourth embodiment.

[0059] Sixth Embodiment

[0060] As shown in Figure 9, in the sixth embodiment, the skeleton layer 10 is provided with three protruding structures 24b arranged sequentially in direction D, and in the cross-section shown, these three protruding structures 24b have a symmetrical square cross-sectional shape with the same size and shape. Preferably, the same protrusion height of the three square protruding structures 24b is approximately 0.5 mm, and the thickness of the skin layer 20, excluding the edge area (i.e., the thickness at the thickness change starting position 22), is approximately 1 mm. In particular, the dimensional data can be adjusted accordingly for different soft plastic materials, and the square cross-section of the protruding structure 24b can be set to asymmetry. For example, the protrusion height of the square protruding structure 24b can be between 0.2 mm and 2.5 mm, and / or, the thickness of the skin layer 20, excluding the edge area, can be between 0.5 mm and 3 mm. The remaining construction of the vehicle trim in this sixth embodiment is the same as in the fourth embodiment.

[0061] Seventh Embodiment

[0062] As shown in Figure 10, in the seventh embodiment, the skeleton layer 10 is provided with three protruding structures 24b arranged sequentially in direction D. In the cross-section shown, these three protruding structures 24b have the same symmetrical square cross-sectional shape, and the protrusion heights of these three square protruding structures 24b increase sequentially in direction D, for example, approximately 0.3 mm, approximately 0.4 mm, and approximately 0.5 mm, respectively. The remaining construction of the vehicle trim in this seventh embodiment is the same as that in the sixth embodiment.

[0063] Eighth embodiment

[0064] As shown in Figure 11, in the eighth embodiment, the skeleton layer 10 is provided with three protruding structures 24b arranged sequentially in direction D, and in the cross-section shown, these three protruding structures 24b have a symmetrical arcuate cross-sectional shape with the same size and shape. Preferably, the same protrusion height of the three arcuate protruding structures 24b is approximately 0.5 mm, and the thickness of the skin layer 20, excluding the edge region (i.e., the thickness at the thickness change starting position 22), is approximately 1 mm. In particular, the dimensional data can be adjusted accordingly for different soft plastic materials, and the arcuate cross-section of the protruding structure 24b can be set to asymmetry. For example, the protrusion height of the arcuate protruding structure 24b can be between 0.2 mm and 2.5 mm, and / or, the thickness of the skin layer 20, excluding the edge region, can be between 0.5 mm and 3 mm. The remaining construction of the vehicle trim in this eighth embodiment is the same as in the fourth embodiment.

[0065] Ninth Embodiment

[0066] As shown in Figure 12, in the ninth embodiment, the skeleton layer 10 is provided with three protruding structures 24b arranged sequentially in direction D. Within the cross-section shown, these three protruding structures 24b have the same symmetrical arcuate cross-sectional shape, and the protrusion heights of these three arcuate protruding structures 24b increase sequentially in direction D, for example, approximately 0.3 mm, approximately 0.4 mm, and approximately 0.5 mm, respectively. The remaining construction of the vehicle trim in this ninth embodiment is the same as that in the eighth embodiment.

[0067] Tenth Embodiment

[0068] As shown in Figure 13, in this soft two-color injection molded vehicle trim, near the boundary of the trim, in direction D, the length of the edge region of the skin layer 20 with reduced thickness (i.e., the region between the thickness change starting position 22 of the skin layer 20 and the boundary 21 of the skin layer 20) is relatively short, making it difficult to accelerate the cooling and molding of the skin layer 20 material in this edge region. Therefore, in the tenth embodiment, the skeleton layer 10 is provided with a protrusion 12 protruding outward from the edge region of the skin layer 20 in direction D. The protrusion height of the protrusion 12 (i.e., the height L2 from the bottom surface 24 of the skin layer 20 to the top of the protrusion 12) is equal to the maximum thickness of the edge region of the skin layer 20 (i.e., the thickness of the thickness change starting position 22 of the skin layer 20), such that the top of the protrusion 12 is flush with the top surface 23 of the skin layer 20 to jointly form a smooth appearance surface, and the boundary 11 of the skeleton layer 10 separately forms the boundary of the vehicle trim. The skeleton layer 10 is made of, for example, PC material, or it can be made of PC / ABS, PP, PE, ABS, nylon, resin-modified filler / reinforced materials, or natural fibers (such as hemp fiber, bamboo fiber, coconut shell fiber, etc.). The skin layer 20 is made of, for example, TPE material or PVC, and can be made of, for example, TPS, TPU, TPEE, TPAE, or TPO. Preferably, in direction D, the thickness of the skin layer 20 at the starting position 22 of the thickness change at the edge region (i.e., the thickness of the skin layer 20 excluding the edge region, which is also the protrusion height of the protrusion 12) is approximately 1 mm. In particular, the dimensional data can be adjusted accordingly for different soft plastic materials. For example, the thickness of the skin layer 20 at the starting position 22 of the thickness change at the edge region can be between 0.5 mm and 3 mm. Thus, the protrusion 12 of the skeleton layer 10 and the mold together seal the skin layer 20, thereby preventing flash at the parting line.

[0069] Eleventh Embodiment

[0070] As shown in Figure 14, in the eleventh embodiment, the skeleton layer 10 is provided with a protrusion 12 extending outward from the edge region of the skin layer 20 in direction D. The protrusion height of the protrusion 12 is greater than the maximum thickness of the edge region of the skin layer 20 (i.e., the thickness at the starting position 22 of the thickness change of the skin layer 20), for example, at least 0.3 mm greater than the maximum thickness of the edge region of the skin layer 20, such that the top of the protrusion 12 is higher than the top surface 23 of the skin layer 20, and the boundary 11 of the skeleton layer 10 separately forms the boundary of the vehicle trim. The remaining construction of the vehicle trim in this eleventh embodiment is the same as that in the tenth embodiment.

[0071] The technical content and features of this disclosure have been disclosed above. However, it is understood that those skilled in the art can make various changes and improvements to the above-disclosed concept under the inventive concept of this disclosure, but all such changes and improvements fall within the protection scope of this disclosure. For example, the vehicle trim of this disclosure can also be a three- or more-color injection-molded vehicle trim, including at least one hard plastic material layer and at least one soft plastic material layer.

[0072] The above description of the embodiments is illustrative and not restrictive, and the scope of protection of this disclosure is determined by the claims.

Claims

1. A multi-color injection-molded vehicle trim part, comprising a skeleton layer and a skin layer covering the skeleton layer, wherein the skeleton layer is a hard plastic material layer and the skin layer is a soft plastic material layer. Its features are, The skin layer has an edge region adjacent to the boundary of the vehicle trim, and at least a portion of the edge region has a reduced thickness compared to the rest of the skin layer excluding the edge region.

2. The multi-color injection-molded vehicle trim according to claim 1, characterized in that, The vehicle trim is configured such that the top surface of the skin layer forms a smooth appearance.

3. The multi-color injection-molded vehicle trim part according to claim 1, characterized in that, The vehicle trim is configured such that the boundary of the skin layer is flush with the boundary of the skeleton layer to form the boundary of the trim as a whole, or such that the boundary of the skeleton layer forms the boundary of the vehicle trim separately.

4. The multi-color injection-molded vehicle trim part according to claim 1, characterized in that, The skin layer is made of thermoplastic elastomer material or polyvinyl chloride.

5. The multi-color injection-molded vehicle trim part according to claim 4, characterized in that, The material of the skin layer is a polystyrene thermoplastic elastomer, a thermoplastic polyurethane elastomer, a thermoplastic polyester elastomer, a thermoplastic polyamide elastomer, or a thermoplastic polyolefin.

6. The multi-color injection-molded vehicle trim according to claim 1, characterized in that, The material of the skeleton layer is polycarbonate, engineering plastic alloy, polypropylene, polyethylene, acrylonitrile-styrene-butadiene copolymer, nylon, resin-modified filler / reinforcing material, or natural fiber.

7. The multi-color injection-molded vehicle trim part according to any one of claims 1 to 6, characterized in that, The thickness of the edge region gradually decreases in the direction from the center of the vehicle trim toward the boundary of the vehicle trim.

8. The multi-color injection-molded vehicle trim part according to claim 7, characterized in that, The thickness of the edge region varies linearly, nonlinearly with a gradually increasing rate of change, or nonlinearly with a gradually decreasing rate of change in the direction from the center of the vehicle trim toward the boundary of the vehicle trim.

9. The multi-color injection-molded vehicle trim part according to claim 7, characterized in that, The thickness of the edge region at its starting position in the direction from the center of the vehicle trim toward the boundary of the vehicle trim is between 0.5 mm and 3 mm, and / or the thickness of the edge region at its ending position in the direction from the center of the vehicle trim toward the boundary of the vehicle trim is between 0.2 mm and 2 mm.

10. The multi-color injection-molded vehicle trim part according to claim 9, characterized in that, The edge region has a thickness of 1 mm at its starting position in the direction from the center of the vehicle trim toward the boundary of the vehicle trim, and / or the edge region has a thickness of 0.3 mm at its ending position in the direction from the center of the vehicle trim toward the boundary of the vehicle trim.

11. The multi-color injection-molded vehicle trim according to claim 7, characterized in that, The length of the edge region in the direction from the center of the vehicle trim toward the boundary of the vehicle trim is between 30 mm and 60 mm.

12. The multi-color injection-molded vehicle trim according to claim 11, characterized in that, The edge region has a length of 40 mm in the direction from the center of the vehicle trim toward the boundary of the vehicle trim.

13. The multi-color injection-molded vehicle trim part according to any one of claims 1 to 6, characterized in that, The skeleton layer is provided with at least one protruding structure that protrudes toward the skin layer, and the projection of the at least one protruding structure along the thickness direction of the vehicle trim is located in the edge region.

14. The multi-color injection-molded vehicle trim according to claim 13, characterized in that, The protruding structure has a triangular, square, or arc-shaped cross-sectional shape in a plane formed by the direction from the center of the vehicle trim toward the boundary of the vehicle trim and the thickness direction of the vehicle trim.

15. The multi-color injection-molded vehicle trim according to claim 14, wherein the cross-sectional shape is symmetrical.

16. The multi-color injection-molded vehicle trim according to claim 13, characterized in that, The protrusion height of the protrusion structure is between 0.2 mm and 2.5 mm, and / or the thickness of the epidermis, excluding the edge region, is between 0.5 mm and 3 mm.

17. The multi-color injection-molded vehicle trim according to claim 16, characterized in that, The protrusion height of the protrusion structure is 0.3 mm, 0.4 mm, or 0.5 mm, and / or the thickness of the epidermal layer, excluding the edge region, is 1 mm.

18. The multi-color injection-molded vehicle trim according to claim 13, characterized in that, The skeleton layer is provided with a plurality of protruding structures arranged sequentially in a direction from the center of the vehicle trim toward the boundary of the vehicle trim.

19. The multi-color injection-molded vehicle trim according to claim 18, characterized in that, The plurality of protrusions have the same protrusion height, or the protrusion height of the plurality of protrusions increases sequentially in the direction from the center of the vehicle trim toward the boundary of the vehicle trim.

20. The multi-color injection-molded vehicle trim part according to any one of claims 1 to 6, characterized in that, The skeleton layer is provided with a protrusion extending outward from the edge region in a direction from the center of the vehicle trim toward the boundary of the vehicle trim, the protrusion height of the protrusion being greater than or equal to the maximum thickness of the edge region.

21. The multi-color injection-molded vehicle trim according to claim 20, characterized in that, The protrusion height of the protrusion is equal to the maximum thickness of the edge region, so that the top of the protrusion is flush with the top surface of the epidermis to jointly form a smooth appearance surface.

22. The multi-color injection-molded vehicle trim according to claim 20, characterized in that, The protrusion height of the protrusion is at least 0.3 mm greater than the maximum thickness of the edge region.

23. The multi-color injection-molded vehicle trim according to claim 20, characterized in that, The protrusion height of the protrusion is between 0.5 mm and 3 mm.

24. The multi-color injection-molded vehicle trim according to claim 23, characterized in that, The protrusion height of the protrusion is 1 mm.

25. A vehicle, characterized in that, Including multi-color injection molded vehicle trim parts according to any one of claims 1 to 24.

26. The vehicle according to claim 25, characterized in that, The vehicle trim includes the vehicle's dashboard, door panels, sub-dashboard, door frame trim, or seat trim.

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