Automobile door outer panel

Abstract

An automobile door outer panel, relating to the technical field of automobile parts. The automobile door outer panel comprises: an inner surface portion (100), which is a thermoplastic resin part; a middle reinforcing portion (200), wherein one surface of the middle reinforcing portion (200) is connected to the inner surface portion (100), and the middle reinforcing portion (200) is a continuous fiber reinforced thermoplastic composite part; and an outer surface portion (300), which is connected to the other surface of the middle reinforcing portion (200), wherein the outer surface portion (300) is a thermoplastic resin part. The beneficial effects are as follows: the automobile door outer panel can be painted with the same color as an automobile body, thereby effectively solving the problem of being difficult to paint a composite outer panel; the dent resistance of the outer panel and the overall performance of an automobile door can be remarkably improved in terms of the rigidity of the automobile door, thereby improving the overall strength; the problem of deformation of the outer panel caused by temperature change can be better solved; and the materials used are the thermoplastic resin parts and the continuous fiber reinforced thermoplastic composite part, and can be recycled.

Description

Automobile door outer panel Technical Field

[0001] The invention belongs to the technical field of automobile parts and relates to an automobile door outer panel. Background Art

[0002] Automobile door outer panels are an important part of automobile interiors. The polypropylene injection-molded outer panels currently popular on the market have low rigidity and poor dent resistance. During user use, they are easily kicked, scratched or rubbed, resulting in white marks. Their scratch resistance is poor, and the entire automobile door outer panel is heavy. Moreover, after being affected by high and low temperatures, they are severely deformed, making it difficult to control the gap and surface difference on the side of the car body. In severe cases, the car door cannot be opened and closed normally. Door outer panels made solely of composite materials such as carbon fiber or glass fiber generally have a carbon fiber texture, which cannot meet the painting requirements of the car body color, resulting in a relatively simple choice of appearance treatment.

[0003] In summary, existing automobile door outer panels all have corresponding defects and have a large room for improvement. Technical issues

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide an automobile door outer panel. Technical Solutions

[0005] The purpose of the present invention is to address the above-mentioned problems in the prior art and to provide an automobile door outer panel.

[0006] The object of the present invention can be achieved through the following technical solutions: An automobile door outer panel, comprising:

[0007] an inner surface portion, which is a thermoplastic resin member;

[0008] an intermediate reinforcement portion, one surface of which is connected to the inner surface portion, wherein the intermediate reinforcement portion is a continuous fiber reinforced thermoplastic composite member;

[0009] The outer surface portion is connected to the other surface of the intermediate reinforcement portion, and the outer surface portion is a thermoplastic resin part.

[0010] In the above-mentioned automobile door outer panel, the outer surface portion and the intermediate reinforcement portion are integrally molded and injection-molded parts.

[0011] In the above-mentioned automobile door outer panel, the inner surface portion is an insert injection-molded part.

[0012] In the above-mentioned automobile door outer panel, the inner surface portion and the outer surface portion are both made of polypropylene.

[0013] In the above-mentioned automobile door outer panel, the end portion of the inner surface portion is bent toward the outer surface portion and connected to the outer surface portion to form a blocking portion, and the blocking portion blocks the end portion of the intermediate reinforcement portion.

[0014] In the above-mentioned automobile door outer panel, the end portion of the outer surface portion extends beyond the blocking portion to form a thin-walled portion.

[0015] In the above-mentioned automobile door outer panel, the blocking portion and the thin-walled portion are located on the side or lower portion of the automobile door outer panel.

[0016] In the above-mentioned automobile door outer panel, the thickness of the inner surface portion is 0.8 mm-2.5 mm, the thickness of the intermediate reinforcement portion is 0.6 mm-1.2 mm, and the thickness of the outer surface portion is 0.8 mm-2.5 mm.

[0017] In the above-mentioned automobile door outer panel, the inner surface portion is a reinforcing rib, the reinforcing rib includes a plurality of reinforcing heads, the reinforcing heads include connecting portions, and the reinforcing heads are connected to the intermediate reinforcing portion through the connecting portions.

[0018] In the above-mentioned automobile door outer panel, the connecting portion is connected to the intermediate reinforcement portion by gluing or welding.

[0019] In the above-mentioned automobile door outer panel, the thickness of the outer surface portion is 2.0 mm to 3.0 mm, the thickness of the intermediate reinforcement portion is 0.1 mm to 1.2 mm, and the thickness of the connecting portion is 1.5 mm to 3 mm.

[0020] In the above-mentioned automobile door outer panel, the reinforcement head further includes a protruding portion, which is integrally connected to the connecting portion and protrudes from the connecting portion.

[0021] In the above-mentioned automobile door outer panel, the connection cross-sectional area of ​​the connection between the connection part and the protrusion is smaller than the connection cross-sectional area of ​​the connection between the connection part and the intermediate reinforcement part, and the cross-sectional area of ​​the connection part extending from the intermediate reinforcement part toward the protrusion gradually decreases.

[0022] The above-mentioned automobile door outer panel further includes an appearance portion, which is connected to a side of the outer surface portion away from the middle reinforcement portion, and is a paint layer.

[0023] The above-mentioned automobile door outer panel further includes an appearance portion, which is connected to a side of the outer surface portion away from the middle reinforcement portion, and is a polyurethane part.

[0024] In the above-mentioned automobile door outer panel, it also includes an appearance part, which is composed of two layers, namely a polyurethane layer and a paint layer. The polyurethane layer is connected to the side of the outer surface part away from the middle reinforcement part, and the paint layer is located on the outer surface of the polyurethane layer. Beneficial effects

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The car door outer panel can be sprayed with the body color, effectively solving the problem of composite material outer panels being difficult to spray. In terms of door rigidity, it can significantly improve the outer panel's dent resistance and the overall performance of the door, increasing the overall strength; it can better improve the deformation problem of the outer panel caused by temperature changes; the materials used are thermoplastic resin parts and continuous fiber reinforced thermoplastic composite parts, which can be recycled.

[0027] 2. The outer surface portion and the middle reinforcement portion are integrally molded and injection-molded as an insert, and the inner surface portion is insert-injected to form the automobile door outer panel. The manufacturing process is simple and the three are firmly connected.

[0028] 3. The end of the inner surface portion is bent toward the outer surface portion and connected to the outer surface portion to form a blocking portion for blocking the end of the middle reinforcement portion. The blocking portion can shield the middle reinforcement portion inside to prevent the middle reinforcement portion from being exposed to the outside and difficult to spray.

[0029] 4. At the edge of the car door outer panel, the thickness within a range of about 20mm-30mm from the boundary should be appropriately thinned, and the end of the outer surface extends and exceeds the blocking part to form a thin-walled part. This structure mainly considers the movement verification of the car door to meet the normal opening and closing functions of the car door.

[0030] 5. The rib structure is different from the overall reinforcement layer or reinforcement plate structure. It is iteratively optimized based on the results of computer mold flow analysis and thermal deformation analysis. It is equivalent to forming a partially hollowed-out structure on the back of the entire middle reinforcement, which further reduces weight.

[0031] 6. The protrusion can strengthen the outer panel of the automobile door. The connection cross-sectional area of ​​the connection between the connecting portion and the protrusion is smaller than the connection cross-sectional area of ​​the connection between the connecting portion and the middle reinforcement portion. Therefore, the connecting portion can increase the connection strength between the reinforcement head and the middle reinforcement portion.

[0032] 7. The cross-sectional area of ​​the connection portion extending from the middle reinforcement portion toward the protruding portion gradually decreases, reducing the portion with a thicker overall wall thickness of the middle reinforcement portion, thereby reducing the local surface shrinkage caused by the reinforcement ribs.

[0033] 8. The appearance part consists of two layers, namely polyurethane layer and paint layer, which can solve special color problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] FIG1 is a schematic structural diagram of one embodiment of the present invention.

[0035] FIG2 is a view taken along the P direction in FIG1 .

[0036] FIG3 is a cross-sectional schematic diagram at the AA viewing angle of FIG2 .

[0037] FIG4 is an enlarged view of portion D of FIG3 .

[0038] FIG5 is an enlarged view of portion E of FIG3 .

[0039] FIG6 is a cross-sectional schematic diagram at a BB perspective in FIG2 .

[0040] FIG. 7 is a cross-sectional schematic diagram taken from a CC perspective in FIG. 2 .

[0041] FIG8 is a schematic structural diagram of one embodiment of the present invention.

[0042] FIG. 9 is an exploded view of one embodiment of the present invention.

[0043] FIG10 is a schematic structural diagram of FIG9 .

[0044] FIG11 is a cross-sectional schematic diagram of FIG10 from the FF perspective.

[0045] FIG12 is a schematic structural diagram of one embodiment of the present invention.

[0046] FIG13 is a schematic structural diagram of one embodiment of the present invention.

[0047] FIG. 14 is a schematic structural diagram of one embodiment of the present invention.

[0048] FIG. 15 is a schematic structural diagram of one embodiment of the present invention.

[0049] In the figure, 100, inner surface portion; 110, blocking portion; 120, reinforcing rib; 121, connecting portion; 122, protruding portion; 200, intermediate reinforcing portion; 300, outer surface portion; 310, thin-walled portion; 400, appearance portion; polyurethane layer 401; and paint layer 402. Modes for Carrying Out the Invention

[0050] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0051] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0052] In addition, in the present invention, descriptions such as "first," "second," and "one" are for descriptive purposes only and should not be understood to indicate or imply their relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0053] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0054] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0055] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0056] As shown in FIG. 1 to FIG. 7 , an automobile door outer panel includes an inner surface portion 100 , an intermediate reinforcement portion 200 and an outer surface portion 300 .

[0057] The inner surface portion 100 is a thermoplastic resin component.

[0058] Specifically, the thickness of the inner surface portion 100 is 0.8 mm-2.5 mm.

[0059] Specifically, the inner surface portion 100 is a polypropylene member.

[0060] One side of the intermediate reinforcement portion 200 is connected to the inner surface portion 100 , and the intermediate reinforcement portion 200 is a continuous fiber reinforced thermoplastic composite component.

[0061] Specifically, the thickness of the intermediate reinforcement portion 200 is 0.6 mm to 1.2 mm.

[0062] The outer surface portion 300 is connected to the other surface of the intermediate reinforcement portion 200 , and the outer surface portion 300 is a thermoplastic resin part.

[0063] Specifically, the thickness of the outer surface portion 300 is 0.8 mm to 2.5 mm.

[0064] Specifically, the outer surface portion 300 is a polypropylene member.

[0065] In this embodiment, the outer panel of the automobile door can be sprayed with the body color, effectively improving the problem that the composite material outer panel is difficult to spray, and can significantly improve the outer panel's dent resistance and the overall performance of the door in terms of door rigidity, thereby increasing the overall strength; it can better improve the deformation problem of the outer panel caused by temperature changes; the materials used are thermoplastic resin parts and continuous fiber reinforced thermoplastic composite parts, which can be recycled.

[0066] As shown in FIG. 1 to FIG. 7 , based on the above embodiment, the outer surface portion 300 and the intermediate reinforcement portion 200 are integrally molded injection molded parts.

[0067] In this embodiment, the outer surface portion 300 and the middle reinforcement portion 200 are integrally molded by injection molding, which simplifies the manufacturing process and ensures that the two are firmly connected.

[0068] As shown in FIG. 1 to FIG. 7 , based on the above embodiment, the inner surface portion 100 is an insert injection molded part.

[0069] In this embodiment, the outer surface portion 300 and the middle reinforcement portion 200 are integrally molded as an insert, and are insert-molded with the inner surface portion 100 to form the automobile door outer panel. The manufacturing process is simple and the three are firmly connected.

[0070] As shown in Figures 1 to 7, based on the above embodiment, the end of the inner surface portion 100 is bent toward the outer surface portion 300 and connected to the outer surface portion 300 to form a blocking portion 110, which blocks the end of the intermediate reinforcement portion 200.

[0071] In this embodiment, the thickness of the edge portion of the outer panel of the automobile door within a range of about 20 mm to 30 mm from the boundary should be appropriately thinned, and the end of the outer surface portion 300 extends beyond the blocking portion 110 to form a thin-walled portion 310. This structure mainly considers the movement calibration of the door to meet the normal opening and closing functions of the door.

[0072] As shown in FIG. 1 to FIG. 7 , based on the above embodiment, the end of the outer surface portion 300 extends beyond the blocking portion 110 to form a thin-walled portion 310 .

[0073] In this embodiment, the thickness of the edge portion of the outer panel of the automobile door within a range of about 20 mm to 30 mm from the boundary should be appropriately thinned, and the end of the outer surface portion 300 extends beyond the blocking portion 110 to form a thin-walled portion 310. This structure mainly considers the movement calibration of the door to meet the normal opening and closing functions of the door.

[0074] It is worth noting here that the blocking portion 110 and the thin-walled portion 310 are located on the side or lower portion of the automobile door outer panel, and can be specifically used for the front, rear and lower portion of the automobile door outer panel to meet the normal opening and closing function of the door.

[0075] As shown in Figure 8, on the basis of the above embodiment, it also includes an appearance part 400, which is connected to the side of the outer surface part 300 away from the intermediate reinforcement part 200. The appearance part 400 can be divided into two forms. The first is that the appearance part 400 is a paint layer, that is, the body color paint treatment is directly performed on the outside of the outer surface part 300; the thickness of the paint layer can be 50-75um, and 60um is optimized for best. The second is that the appearance part 400 is a polyurethane part, that is, a polyurethane part with body color is connected to the outside of the outer surface part 300, which can also be called a PUR layer. When the appearance part 400 is a polyurethane part, the thickness is 0.25-0.7 mm, and 0.5 mm is optimized for best.

[0076] As shown in FIG. 9 to FIG. 11 , an outer door panel of an automobile includes an inner surface portion 100 , an intermediate reinforcement portion 200 and an outer surface portion 300 .

[0077] The inner surface portion 100 is a thermoplastic resin component.

[0078] Specifically, the inner surface portion 100 is a reinforcing rib 120 , and the reinforcing rib 120 includes a plurality of reinforcing heads. The reinforcing heads include a connecting portion 121 , and the reinforcing heads are connected to the intermediate reinforcing portion 200 via the connecting portion 121 .

[0079] Specifically, the reinforcing rib 120 is a polypropylene piece.

[0080] Specifically, the thickness of the connecting portion 121 is 1.5 mm to 3 mm.

[0081] In practical applications, the connection portion 301 is optimized to be 2.5 mm.

[0082] One side of the intermediate reinforcement portion 200 is connected to the inner surface portion 100 , and the intermediate reinforcement portion 200 is a continuous fiber reinforced thermoplastic composite component.

[0083] Specifically, the thickness of the intermediate reinforcement portion 200 is 0.1 mm-1.2 mm.

[0084] In practical applications, the middle reinforcement portion 200 is optimized to be 0.2 mm.

[0085] The outer surface portion 300 is connected to the other surface of the intermediate reinforcement portion 200 , and the outer surface portion 300 is a thermoplastic resin part.

[0086] Specifically, the thickness of the outer surface portion 300 is 2.0 mm to 3.0 mm.

[0087] In practical applications, the outer surface portion 300 is optimized to be 2.2 mm.

[0088] Specifically, the outer surface portion 300 is a polypropylene member.

[0089] It is worth noting here that the structure of the reinforcing rib 120 in this embodiment is different from the reinforcing layer or reinforcing plate structure of the embodiments shown in Figures 1 to 7. The reinforcing layer or reinforcing plate is an integral structure, and the main design of the reinforcing rib 120 is iteratively optimized based on the results of computer mold flow analysis and thermal deformation analysis, which is equivalent to forming a partially hollowed-out structure on the back of the entire middle reinforcement part 200, thereby further reducing weight.

[0090] As shown in FIG. 12 , based on the above embodiment, the reinforcing head further includes a protruding portion 122 , which is integrally connected to the connecting portion 121 and protrudes from the connecting portion 121 .

[0091] In this embodiment, the protrusion 122 can strengthen the outer panel of the automobile door. The connection cross-sectional area at the connection between the connecting portion 121 and the protrusion 122 is smaller than the connection cross-sectional area at the connection between the connecting portion 121 and the intermediate reinforcement portion 200. Therefore, the connecting portion 121 can increase the connection strength between the reinforcement head and the intermediate reinforcement portion 200.

[0092] As shown in Figure 13, based on the above embodiment, the connection cross-sectional area at the connection between the connection part 121 and the protrusion 122 is smaller than the connection cross-sectional area at the connection between the connection part 121 and the intermediate reinforcement part 200, and the cross-sectional area of ​​the connection part 121 extending from the intermediate reinforcement part 200 toward the protrusion 122 gradually decreases.

[0093] In this embodiment, the cross-sectional area of ​​the connecting portion 121 extending from the middle reinforcement portion 200 toward the protruding portion 122 gradually decreases, reducing the portion with a thicker overall wall thickness of the middle reinforcement portion 200 , thereby reducing local surface shrinkage caused by the reinforcing rib 120 .

[0094] As shown in Figure 14, on the basis of the above embodiment, it also includes an appearance part 400, which is connected to the side of the outer surface part 300 away from the intermediate reinforcement part 200. The appearance part 400 can be divided into two forms. The first is that the appearance part 400 is a paint layer, that is, the body color is directly painted on the outside of the outer surface part 300, and the thickness of the paint layer of the appearance part 400 is 50-75um, specifically optimized to 60um. The second is that the appearance part 400 is a polyurethane part, and the polyurethane part is optimized to the body color, that is, the body color polyurethane part is connected to the outside of the outer surface part 300. When the appearance part 400 is a polyurethane part, the thickness is 0.3 mm-0.7 mm, specifically optimized to 0.5 mm.

[0095] As shown in Figure 15, in order to better achieve the color matching of the vehicle body, the appearance part is also included here. The appearance part is composed of two layers, namely a polyurethane layer 401 and a paint layer 402. Using a single polyurethane layer cannot be processed when it comes to special colors, so after the polyurethane layer 401 is in-mold injected, a paint layer 402 is added to its outer surface. The polyurethane layer is also a polyurethane part. The polyurethane layer is connected to the side of the outer surface part 300 away from the middle reinforcement part. The paint layer 402 is located on the outer surface of the polyurethane layer 401. The thickness of the polyurethane layer 401 is 0.3mm-0.7mm, specifically optimized to 0.5mm, and the thickness of the paint layer 402 is 50-75um, specifically optimized to 60um.

Claims

1. An automobile door outer panel, characterized in that: include: an inner surface portion, which is a thermoplastic resin member; an intermediate reinforcement portion, one side of which is connected to the inner surface portion, wherein the intermediate reinforcement portion is a continuous fiber reinforced thermoplastic composite; The outer surface portion is connected to the other surface of the intermediate reinforcement portion, and the outer surface portion is a thermoplastic resin part.

2. The automobile door outer panel according to claim 1, characterized in that: The outer surface portion and the middle reinforcement portion are integrally molded injection molded parts.

3. The automobile door outer panel according to claim 2, characterized in that: The inner surface portion is an insert injection molded part.

4. An automobile door outer panel according to any one of claims 1 to 3, characterized in that: The inner surface portion and the outer surface portion are both polypropylene members.

5. An automobile door outer panel according to any one of claims 1 to 3, characterized in that: The end of the inner surface portion is bent toward the outer surface portion and connected to the outer surface portion to form a blocking portion, and the blocking portion blocks the end of the intermediate reinforcement portion.

6. The automobile door outer panel according to claim 5, characterized in that: The end of the outer surface portion extends beyond the blocking portion to form a thin-walled portion.

7. The automobile door outer panel according to claim 6, characterized in that: The blocking portion and the thin-walled portion are located on the side or lower portion of the automobile door outer panel.

8. An automobile door outer panel according to any one of claims 1 to 3, characterized in that: The thickness of the inner surface portion is 0.8 mm-2.5 mm, the thickness of the intermediate reinforcement portion is 0.6 mm-1.2 mm, and the thickness of the outer surface portion is 0.8 mm-2.5 mm.

9. An automobile door outer panel as claimed in claim 1 or 2, characterized in that: The inner surface portion is a reinforcing rib, the reinforcing rib includes a plurality of reinforcing heads, the reinforcing heads include connecting portions, and the reinforcing heads are connected to the middle reinforcing portion through the connecting portions.

10. The automobile door outer panel according to claim 9, characterized in that: The connecting portion is connected to the middle reinforcing portion by gluing or welding.

11. The automobile door outer panel according to claim 9, characterized in that: The thickness of the outer surface portion is 2.0 mm-3.0 mm, the thickness of the middle reinforcement portion is 0.1 mm-1.2 mm, and the thickness of the connecting portion is 1.5 mm-3 mm.

12. The automobile door outer panel according to claim 9, characterized in that: The reinforcing head further includes a protruding portion, which is integrally connected to the connecting portion and protrudes from the connecting portion.

13. The automobile door outer panel according to claim 12, characterized in that: The cross-sectional area of ​​the connection between the connection portion and the protrusion is smaller than the cross-sectional area of ​​the connection between the connection portion and the intermediate reinforcement portion, and the cross-sectional area of ​​the connection portion extending from the intermediate reinforcement portion toward the protrusion gradually decreases.

14. The automobile door outer panel according to claim 1, characterized in that: It also includes an appearance part, which is connected to a side of the outer surface part away from the middle reinforcement part, and is a spray paint layer.

15. The automobile door outer panel according to claim 1, characterized in that: It also includes an appearance part, which is connected to a side of the outer surface part away from the middle reinforcement part, and is a polyurethane part.

16. The automobile door outer panel according to claim 1, characterized in that: It also includes an appearance part, which consists of two layers, namely a polyurethane layer and a paint layer. The polyurethane layer is connected to a side of the outer surface part away from the middle reinforcement part, and the paint layer is located on the outer surface of the polyurethane layer.

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