Production method of automobile wheel cover and automobile wheel cover

Abstract

The invention provides an automobile wheel cover production method and a wheel cover thereof. The automobile wheel cover production method comprises the following steps that firstly, an inner cover, an outer cover and a mounting cover are formed through punch forming; secondly, the mounting cover is arranged between the inner cover and the outer cover and welded to the inner cover and the outer cover; thirdly, after welding is completed, a welding included angle is formed between the mounting cover and the inner cover; and fourthly, a plastic strip is formed in the welding included angle in an injection molding mode, and the automobile fender wheel cover is obtained. Wherein in the fourth step, plastic strips are formed in the welding included angle in an injection molding mode to obtain the automobile fender wheel cover, namely, a first plastic strip, a second plastic strip and a third plastic strip are formed in the welding included angle in an injection molding mode, the first plastic strip is located between the outer cover and the inner cover, and the lower side wall of the first plastic strip is flush with the upper side face of the inner cover; the upper side wall of the first plastic strip is lower than or flush with the lower side face of the outer cover. According to the automobile fender wheel cover, the automobile fender wheel cover is improved, so that the structure of the automobile fender wheel cover is more stable and reliable, the cost is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the field of automobile parts production, and in particular to a production method for an automobile wheel cover. Background Art

[0002] Automobile fender wheel covers are automobile parts, and their function is to prevent mud from splashing into the rear axle and causing rust on the rear axle. The existing production methods of automobile fender wheel covers are divided into two methods: first, the outer cover and the inner cover are combined for production, and the specific production method is: first, the outer cover and the inner cover are processed separately, the inner cover is first punched out, and then the outer cover is welded to the outer periphery of the inner cover, and the welding joint is treated with anti-rust by electrophoresis; second, the outer cover and the inner cover are injection molded to form an automobile fender wheel cover, wherein the outer cover is connected by welding; in the first method, it is necessary to ensure the flatness of the welding interface between the inner and outer covers during welding, and it is difficult to align the inner and outer covers during welding, there are many welding interfaces, and welding cracks are easily generated, the welding quality is unqualified and the welding is difficult, the combination accuracy of the inner and outer covers is low, and gaps are easily generated, and anti-rust treatment is performed by electrophoresis in the later stage. The outer cover and the inner cover need to be stamped separately, and the production time is relatively long.

[0003] The second method requires that the inner cover and the outer cover be molded separately by injection molding in advance, so that the outer cover forms a cover body located outside the inner cover, and the cover body and the inner cover are connected by screw connection. When the inner cover is molded, it is necessary to ensure the accurate positioning of multiple screws, and the precision requirement is relatively high. If the positioning accuracy of multiple screws is not high, it is not conducive to the later installation; the existing inner cover and outer cover are connected by screws, which is easy to produce gaps at the screws, resulting in poor dustproof effect, and because there are gaps between the screw nut and the inner cover and the outer cover, if spraying is performed, the spraying coverage rate will be poor, and the primer will be exposed on the screws and nuts, and the anti-rust performance is poor. The existing inner and outer covers are produced by injection molding, and two molds for the outer cover and the inner cover need to be manufactured in advance. Due to the high height of the outer cover, the position of the outer cover is relatively difficult to determine during injection molding, and gaps are easily generated. The production time is long, and its production efficiency and precision are relatively low. When the outer cover is injection molded, if gaps are generated when the injection molding material is filled, the injection molding material will be unevenly filled, resulting in weak strength of the automobile fender wheel cover.

[0004] In summary, how to avoid too many welding joints between the inner and outer covers when producing automobile fender wheel covers, facilitate welding and electrophoresis treatment, improve the bonding accuracy between the inner and outer covers, make the structural strength of the automobile fender wheel covers better, reduce the difficulty of injection molding, and improve the injection molding quality and efficiency are issues that need to be solved urgently.

[0005] Therefore, in view of this, the inventor has studied and improved the existing technology and its shortcomings, and provided a production method for an automobile wheel cover, in order to achieve a more practical purpose. Summary of the invention

[0006] In order to solve the problems mentioned in the above background technology, the present invention provides a method for producing a car wheel cover.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A method for producing a car wheel cover, comprising the following steps: step 1, stamping out an inner cover, an outer cover and a mounting cover; step 2, arranging the mounting cover between the inner and outer covers and welding them to each other; step 3, after welding, forming a welding angle between the mounting cover and the inner cover; step 4, injection molding a plastic strip within the welding angle to obtain a car fender wheel cover; wherein; in step 4, injection molding a plastic strip within the welding angle to obtain a car fender wheel cover, refers to injection molding a first plastic strip, a second plastic strip and a third plastic strip within the welding angle, wherein the first plastic strip is located between the outer cover and the inner cover, the lower side wall of the first plastic strip is flush with the upper side wall of the inner cover, the upper side wall of the first plastic strip is lower than or flush with the lower side wall of the outer cover, the lower side wall and the upper side of the first plastic strip form a concave-convex arc surface, and the arc surface of the first plastic strip The angle between the tangent and the side of the installation cover is 45°, the second plastic strip is arranged between the first plastic strip, the inner cover and the outer cover, the upper part of the second plastic strip is in contact with the inner side of the outer cover, the lower part of the second plastic strip is in contact with the inner side of the inner cover, and the angle between the two side surfaces of the second plastic strip is 45°, the third plastic strip is in contact with the outer cover, the outer cover, the second plastic strip and the first plastic strip at the same time, the angle between the third plastic strip and the outer cover, the inner cover and the first plastic strip in contact with the surface is 45°, and the angle between the third plastic strip and the welding angle is 45°; the lower side surfaces of the second plastic strip and the third plastic strip are at the same height; in step four, after the injection molding is completed, the first plastic strip, the second plastic strip and the third plastic strip are vibrated to generate a pressure of 10-20MPa between the first plastic strip, the second plastic strip and the third plastic strip and the inner cover and the outer cover after the plastic strips are formed.

[0009] As a preferred embodiment of the present invention, in step 1, the preparation of the outer cover includes the following steps:

[0010] Step 1: Processing an outer cover on the steel plate, the outer cover is provided with an outward upper flange and an outward lower flange, and the lower flange is provided with a fitting surface fitted with the first plastic strip;

[0011] Step 2: flanging the upper and lower flanges: flanging the upper flange for the first time, with a flanging angle of 15°, and a height of 13.5 mm after the first flanging; flanging the upper flange for the second time, with a flanging angle of 25°, and a height of 17 mm after the second flanging;

[0012] Step 3: Perform the first flanging process on the lower flange, the flanging angle is 25°, and the height of the lower flange after the first flanging is completed is 13mm;

[0013] Step 4: Perform a second flange process on the outer cover so that its lower flange fits the exposed surface of the first plastic strip.

[0014] As a preferred embodiment of the present invention, in step one, the preparation of the inner cover includes the following steps: step one, processing the inner cover on the steel plate, processing an outward folded edge at the end of the inner cover, and the flange is provided with a fitting surface that fits with the first plastic strip; step two, flanging the folded edge toward the center direction of the car, the angle between the flange surface and the side surface of the mounting cover is 45°, and the flange surface is provided with two outward folded fender connection holes for fixed connection with the fender.

[0015] As a preferred embodiment of the present invention, in step one, the cross-section of the mounting cover is trapezoidal, the angle between the outer side surface of the mounting cover and the welding angle is 45°, and the upper side surface and the lower side surface of the mounting cover are respectively fitted with the inner side surfaces of the outer cover and the inner cover.

[0016] As a preferred embodiment of the present invention, the preparation of the inner cover and the outer cover includes the following steps: step 1, stamping the outer cover and the inner cover to shrink the inner side surfaces of the outer cover and the inner cover, wherein the inner side surface of the outer cover and the inner side surface of the inner cover shrink toward each other; step 2, welding the second plastic strip to the outer cover and the inner cover; step 3, after welding, injection molding is performed within the welding angle to obtain a third plastic strip.

[0017] As a preferred embodiment of the present invention, the second plastic strip is divided into a trapezoidal portion and a right-angle portion, both of which are hollow frames and the hollow parts are filled with sound-absorbing cotton, and the edges of the sound-absorbing cotton are attached to the hollow inner walls of the trapezoidal portion and the right-angle portion.

[0018] As a preferred embodiment of the present invention, the second plastic strip, the first plastic strip and the two third plastic strips together form a trapezoidal cavity, and the trapezoidal cavity is filled with sound-absorbing cotton.

[0019] As a preferred embodiment of the present invention, the second plastic strip is obtained by injection molding in the welding angle, which means that before the inner cover and the outer cover are welded, the inner side surface of the outer cover is flanged up and down, and the upper and lower flanges of the inner side surface of the outer cover are 120° to the outer cover, and the upper and lower flanges of the inner side surface of the outer cover are welded to the inner cover, and a molding area of ​​the plastic strip is formed in the welding angle between the flanges of the inner side surfaces of the inner cover and the outer cover, and the upper and lower sides of the inner cover are flanged inwardly, and the angle between the inner flange of the lower side of the inner cover and the side of the inner cover is 45°, the angle between the inner flange of the upper side of the inner cover and the side of the inner cover is 45°, and the angle between the inner flange of the upper and lower sides of the inner cover is 90°. The welding angle and the inner flange of the inner cover side form a closed area, and a second plastic strip molding area is formed at the inner arc surface position of the welding angle, and the second plastic strip is fitted with the inner flange of the inner cover side and the flange surface of the inner side surface of the outer cover, and the second plastic strip after molding is vibrated, and molten plastic is filled in the welding angle.

[0020] As a preferred embodiment of the present invention, after the inner side surface of the outer cover is flanged up and down, the upper and lower flanges constitute the side surface of the mounting cover, and the upper and lower flanges of the inner side surface of the outer cover, the inner side surface of the outer cover and the inner side surface of the inner cover constitute a sound insulation cavity, and the sound insulation cavity is filled with sound-absorbing cotton.

[0021] On the other hand, the present invention also provides a car wheel cover, comprising an inner cover, an outer cover and a mounting cover, wherein the mounting cover is arranged between the inner and outer covers and welded to each other, a welding angle is formed between the mounting cover and the inner cover, a first plastic strip, a second plastic strip and a third plastic strip are injection molded in the welding angle, the first plastic strip is located between the outer cover and the inner cover, the lower side wall of the first plastic strip is flush with the upper side of the inner cover, the upper side wall of the first plastic strip is lower than or flush with the lower side of the outer cover, the lower side and the upper side of the first plastic strip form an arc surface, the upper side of the first plastic strip forms an angle of 20° with the side of the mounting cover, and the lower side of the first plastic strip forms an angle of The angle between the second plastic strip and the welding angle is 45°. The second plastic strip is arranged between the first plastic strip, the inner cover and the outer cover. The upper part of the second plastic strip is in contact with the inner side surface of the outer cover, and the lower part of the second plastic strip is in contact with the inner side surface of the inner cover. The angle between the two side surfaces of the second plastic strip is 45°. The third plastic strip is in contact with the outer cover, the outer cover, the second plastic strip and the first plastic strip at the same time. The angle between the third plastic strip and the outer cover, the inner cover and the first plastic strip is 45°, and the angle between the third plastic strip and the welding angle is 45°. The lower sides of the first plastic strip, the second plastic strip and the third plastic strip are at the same height. The lower side surface of the first plastic strip is folded toward the outer cover and has an angle of 40 to 50° with the outer cover.

[0022] In summary, the present invention has the following beneficial effects:

[0023] 1. After injection molding, the first plastic strip, the second plastic strip and the third plastic strip are vibrated to generate a pressure of 10-20 MPa between the first plastic strip, the second plastic strip and the third plastic strip and the inner cover and the outer cover after the plastic strips are molded, so that the automobile fender wheel cover has a stable strength, thereby improving the strength of the automobile fender wheel cover and facilitating the use of the automobile fender wheel cover, making the automobile fender wheel cover not easily destroyed or damaged, and effectively extending the service life of the automobile fender wheel cover.

[0024] 2. The first plastic strip, the second plastic strip and the third plastic strip are injection molded in the welding angle, which can not only protect and strengthen the welding angle, but also protect the welds on both sides of the first plastic strip, so that the welds will not be damaged by the fender wheel cover during driving, and the stability of the welds can be ensured, thereby ensuring the strength and service life of the automobile fender wheel cover.

[0025] 3. By repeatedly turning over the outer cover and the inner cover, the first plastic strip, the second plastic strip and the third plastic strip can be smoothly formed, so that the strength and air tightness of the automobile fender wheel cover are effectively guaranteed;

[0026] 4. The inner cover, the outer cover and the mounting cover are connected by welding, and a welding angle is set between the inner cover and the outer cover. The welding angle can protect the welds between the inner cover, the outer cover and the mounting cover and the first plastic strip, the second plastic strip and the third plastic strip. The welding angle can greatly improve the strength of the automobile fender wheel cover, thereby greatly improving the air tightness of the automobile fender wheel cover and the strength of the automobile fender wheel cover. The reliable connection of the automobile fender wheel cover is achieved by setting the welding angle, thereby extending the service life of the automobile fender wheel cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a cross-sectional view of a car wheel cover according to Embodiment 1 of the present invention;

[0029] Figure 2 A cross-sectional view of a vehicle wheel cover according to Embodiment 2 of the present invention;

[0030] Figure 3 The present invention is a flow chart of the method for producing automobile wheel covers.

[0031] In the figure: 1. Welding angle; 2. First plastic strip; 3. Second plastic strip; 4. Third plastic strip; 5. Installation cover; 6. Outer cover; 7. Inner cover. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1

[0034] A method for producing a car wheel cover, such as Figure 1 As shown, the following steps are included: step 1, stamping out an inner cover 7, an outer cover 6 and a mounting cover 5; step 2, arranging the mounting cover 5 between the inner and outer covers 6 and welding them to each other; step 3, after welding, forming a welding angle 1 between the mounting cover 5 and the inner cover 7; step 4, injection molding a plastic strip in the welding angle 1 to obtain a car fender wheel cover.

[0035] Wherein, during injection molding, the outer cover 6 described in step 1 specifically includes the following steps:

[0036] Step 1: Process an outer cover 6 on the steel plate. The outer cover 6 is provided with an outward upper flange and an outward lower flange. The lower flange is provided with a fitting surface that fits with the first plastic strip 2.

[0037] Specifically, the upper flange, the lower flange, and both side portions of the outer cover 6 are integrally formed with the outer cover 6 , and the upper flange and the lower flange are folded outward from the outer cover 6 .

[0038] Step 2: Perform the first flanging process on the upper flange, the flanging angle is 15°, and the height of the upper flange after the first flanging is 13.5mm; Step 3: Perform the second flanging process on the upper flange, the flanging angle is 25°, and the height of the upper flange after the second flanging is 17mm; Step 4: Perform the first flanging process on the lower flange, the flanging angle is 25°, and the height of the lower flange after the first flanging is 13mm; Step 5: Perform the second flanging process on the lower flange, so that the lower flange fits the exposed surface of the first plastic strip 2, and the lower flanging process can ensure this fitting effect. Make the contact between the lower flange and the plastic strip closer, so as to further support and fix the first plastic strip 2.

[0039] Specifically, the inner cover 7 in step one specifically includes the following steps: step one, a folded edge folded outward is processed at the end of the inner cover 7, and the folded edge is provided with a fitting surface that fits with the first plastic strip 2, so that the first plastic strip 2 can be further fixed and tightly attached to the third plastic strip 4, thereby improving the fitting accuracy of the entire wheel cover assembly.

[0040] Step 2: Flanging the folded edge toward the center of the car, with the angle between the flanged surface and the side of the mounting cover 5 being 45°. The flanged surface is provided with two fender connection holes folded outward, and the two fender connection holes are folded toward the direction of the outer cover 6 for fixed connection with the fender.

[0041] Specifically, the cross-section of the mounting cover 5 in step one is a trapezoid, the angle between the outer side surface of the mounting cover 5 and the inner cover 7 is 45°, and the top and bottom of the mounting cover 5 are respectively in contact with the inner side surfaces of the outer cover 6 and the inner cover 7.

[0042] Specifically, the second plastic strip 3 is divided into a trapezoidal part and a right-angled part, the trapezoidal part and the right-angled part are both hollow frames and the hollow parts are filled with sound-absorbing cotton. The hollow frame structure of the trapezoidal part and the right-angled part can reduce the weight of the overall component while maintaining sufficient structural strength. Filling the sound-absorbing cotton in the hollow frame can improve the sound insulation performance of the component and reduce the propagation of noise. The edge of the sound-absorbing cotton is attached to the hollow inner wall of the trapezoidal part and the right-angled part, which can ensure that the sound-absorbing cotton will not shift due to vibration during the driving of the car. The second plastic strip 2, the first plastic strip 3 and the two third plastic strips are surrounded to form a trapezoidal cavity, which helps to disperse stress and avoid stress concentration, thereby reducing internal stress. At the same time, the trapezoidal cavity can further enhance the sound insulation effect. The trapezoidal cavity is filled with sound-absorbing cotton, which can absorb sound waves and reduce echoes and resonance.

[0043] In the present solution, when manufacturing the automobile fender, the inner cover 7, the outer cover 6 and the mounting cover 5 are welded to form a welding angle 1 between the inner cover 7, the outer cover 6 and the mounting cover 5, so that injection molding is performed within the welding angle 1 to obtain the automobile fender, and the third plastic strip 4 is connected by the first plastic strip 2, and the upper side and lower side of the third plastic strip 4 are aligned with the upper and lower side of the second plastic strip 3, and the welding angle 1 is 45°, thereby reducing the internal stress caused by inaccurate alignment. At the same time, the angle between the third plastic strip 4 and the outer cover 6, the inner cover 7 and the second plastic strip 3 is also 45°, thereby reducing the internal stress between the second plastic strip 3 and the third plastic strip 4. When the automobile is driving, the influence of stress on the vibration of the fender and the fender is reduced, the deformation of the fender and the displacement between the fender and the fender are reduced, and the automobile fender has the beneficial effect of good stability in use.

[0044] Embodiment 2: A method for producing a car wheel cover, comprising: step 1, stamping an outer cover 6 and an inner cover 7 to shrink the inner side surfaces of the outer cover 6 and the inner cover 7, wherein the inner side surface of the outer cover 6 and the inner side surface of the inner cover 7 shrink toward each other; step 2, welding a second plastic strip between the outer cover 6 and the inner cover 7; step 3, after welding, performing injection molding within the welding angle to obtain a third plastic strip.

[0045] Embodiment 3: A method for producing a wheel cover for an automobile, which is different from Embodiment 2 in that: the second plastic strip 3 is obtained by injection molding within the welding angle 1, which means that before the inner cover 7 and the outer cover 6 are welded, the inner side surface of the outer cover 6 is flanged up and down, and the upper and lower flanges of the inner side surface of the outer cover 6 are 120° apart from the outer cover 6, and the upper and lower flanges of the inner side surface of the outer cover 6 are welded to the inner cover 7, and a molding area of ​​the plastic strip is formed within the welding angle 1 between the flanges of the inner side surfaces of the inner cover 7 and the outer cover 6, and the upper and lower side portions of the inner cover 7 are flanged inwardly, and the inner flange of the lower side portion of the inner cover 7 is aligned with the side portion of the inner cover 7. The angle is 45°, the angle between the inner flange of the upper side of the inner cover 7 and the side of the inner cover 7 is 45°, the angle between the inner flanges of the upper and lower sides of the inner cover 7 is 90°, the welding angle 1 and the inner flange of the side of the inner cover 7 form a closed area, and the second plastic strip 3 molding area is formed at the inner arc surface position of the welding angle 1, the second plastic strip 3 is fitted with the inner flange of the side of the inner cover 7 and the flange surface of the inner side of the outer cover 6, the second plastic strip 3 after molding is vibrated, and molten plastic is filled in the welding angle 1, which can ensure the close combination between the plastic strip and the cover body and improve the sealing and sound insulation performance of the overall structure.

[0046] Specifically, after the inner side surface of the outer cover 6 is flanged up and down, the upper and lower flanges constitute the side surface of the mounting cover 5, and the upper and lower flanges of the inner side surface of the outer cover 6 and the inner side surface of the inner cover 7 constitute a sound insulation cavity, and the sound insulation cavity is filled with sound-absorbing cotton.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for producing a car wheel cover, characterized in that: The invention comprises the following steps: step 1, stamping out an inner cover (7), an outer cover (6) and a mounting cover (5); step 2, arranging the mounting cover (5) between the inner cover and the outer cover (6) and welding them to each other; step 3, after welding, forming a welding angle (1) between the mounting cover (5) and the inner cover (7); step 4, injection molding a plastic strip in the welding angle (1) to obtain a mud guard wheel cover for an automobile; wherein, in step 4, a plastic strip is injection molded in the welding angle (1) to obtain a mud guard wheel cover for an automobile. The invention refers to the process of injection molding a first plastic strip (2), a second plastic strip (3) and a third plastic strip (4) within a welding angle (1), wherein the first plastic strip (2) is located between an outer cover (6) and an inner cover (7), the lower side wall of the first plastic strip (2) is flush with the upper side wall of the inner cover (7), the upper side wall of the first plastic strip (2) is lower than or flush with the lower side wall of the outer cover (6), the lower side wall and the upper side of the first plastic strip (2) form a concave-convex arc surface, and the angle between the arc surface tangent of the first plastic strip (2) and the side surface of the mounting cover (5) is 45° The second plastic strip (3) is arranged between the first plastic strip (2), the inner cover (7) and the outer cover (6); the upper part of the second plastic strip (3) is in contact with the inner side surface of the outer cover (6); the lower part of the second plastic strip (3) is in contact with the inner side surface of the inner cover (7); the angle between the two side surfaces of the second plastic strip (3) is 45°; the third plastic strip (4) is in contact with the outer cover (6), the outer cover (6), the second plastic strip (3) and the first plastic strip (2); the third plastic strip (4) is in contact with the outer cover (6), the inner cover (7) and the first plastic strip ( 2) the angle between the fitted surfaces is 45°, and the angle between the third plastic strip (4) and the welding angle (1) is 45°; the lower sides of the second plastic strip (3) and the third plastic strip (4) are located at the same height; in step 4, after the injection molding is completed, the first plastic strip (2), the second plastic strip (3) and the third plastic strip (4) are vibrated to generate a pressure of 10-20 MPa between the first plastic strip (2), the second plastic strip (3) and the third plastic strip (4) and the inner cover (7) and the outer cover (6) after the plastic strips are molded.

2. The method for producing a car wheel cover according to claim 1, characterized in that: In step 1, the preparation of the outer cover (6) comprises the following steps: Step 1: Processing an outer cover (6) on a steel plate, wherein the outer cover (6) is provided with an outward upper flange and an outward lower flange, and the lower flange is provided with a fitting surface that fits with the first plastic strip (2); Step 2: flanging the upper and lower flanges: flanging the upper flange for the first time, with a flanging angle of 15°, and a height of 13.5 mm after the first flanging; flanging the upper flange for the second time, with a flanging angle of 25°, and a height of 17 mm after the second flanging; Step 3: Perform a first flanging process on the lower flange, with a flanging angle of 25°. After the first flanging is completed, the height of the lower flange is 13 mm. Step 4: Perform a second flanging process on the outer cover (6) so that the lower flange fits the exposed surface of the first plastic strip (2).

3. The method for producing a car wheel cover according to claim 1, characterized in that: In step one, the preparation of the inner cover (7) includes the following steps: step one, processing the inner cover (7) on a steel plate, processing an outwardly folded edge at the end of the inner cover (7), and the flange is provided with a fitting surface that fits with the first plastic strip (2); step two, flanging the folded edge toward the center of the car, the angle between the flange surface and the side surface of the mounting cover (5) is 45 degrees, and the flange surface is provided with two outwardly folded fender connection holes for fixed connection with the fender.

4. The method for producing a car wheel cover according to claim 1, characterized in that: In step one, the cross-section of the mounting cover (5) is a trapezoid, the angle between the outer side surface of the mounting cover (5) and the welding angle (1) is 45°, and the upper side surface and the lower side surface of the mounting cover (5) are respectively fitted with the inner side surfaces of the outer cover (6) and the inner cover (7).

5. The method for producing a car wheel cover according to claim 1, characterized in that: The preparation of the inner cover (7) and the outer cover (6) comprises the following steps: step 1, stamping the outer cover (6) and the inner cover (7) to shrink the inner side surfaces of the outer cover (6) and the inner cover (7), wherein the inner side surface of the outer cover (6) and the inner side surface of the inner cover (7) shrink towards each other; step 2, welding the second plastic strip (3) to the outer cover (6) and the inner cover (7); step 3, after welding, injection molding is performed within the welding angle (1) to obtain the third plastic strip (4).

6. The method for producing a car wheel cover according to claim 1, characterized in that: The second plastic strip (3) is divided into a trapezoidal portion and a right-angled portion. Both the trapezoidal portion and the right-angled portion are hollow frames and the hollow parts are filled with sound-absorbing cotton. The edges of the sound-absorbing cotton are attached to the hollow inner walls of the trapezoidal portion and the right-angled portion.

7. The method for producing a car wheel cover according to claim 1, characterized in that: The second plastic strip (3), the first plastic strip (2) and the two third plastic strips (4) together form a trapezoidal cavity, and the trapezoidal cavity is filled with sound-absorbing cotton.

8. The method for producing a car wheel cover according to claim 5, characterized in that: The second plastic strip (3) is obtained by injection molding within the welding angle (1), which means that before the inner cover (7) and the outer cover (6) are welded, the inner side surface of the outer cover (6) is flanged up and down, the upper and lower flanged surfaces of the inner side surface of the outer cover (6) are 120 degrees apart from the outer cover (6), the upper and lower flanged surfaces of the inner side surface of the outer cover (6) are welded to the inner cover (7), and a molding area of ​​the plastic strip is formed within the welding angle (1) between the flanged surfaces of the inner side surfaces of the inner cover (7) and the outer cover (6), the upper and lower side portions of the inner cover (7) are flanged inwardly, and the flanged surface of the lower side portion of the inner cover (7) is flanged inwardly with the inner cover ( The angle between the inner flange of the upper side of the inner cover (7) and the side of the inner cover (7) is 45°, the angle between the inner flanges of the upper and lower sides of the inner cover (7) is 90°, the welding angle (1) and the inner flange of the side of the inner cover (7) form a closed area, and a second plastic strip (3) molding area is formed at the inner arc surface position of the welding angle (1), the second plastic strip (3) is fitted with the inner flange of the side of the inner cover (7) and the flange surface of the inner side of the outer cover (6), the second plastic strip (3) after molding is vibrated, and molten plastic is filled in the welding angle (1).

9. The method for producing a car wheel cover according to claim 8, characterized in that: After the inner side surface of the outer cover (6) is flanged up and down, the upper and lower flanges form the side surface of the mounting cover (5), and the upper and lower flanges of the inner side surface of the outer cover (6) and the inner side surface of the inner cover (7) form a sound insulation cavity, and the sound insulation cavity is filled with sound-absorbing cotton.

10. An automobile wheel cover, characterized in that: The invention comprises an inner cover (7), an outer cover (6) and a mounting cover (5), wherein the mounting cover (5) is arranged between the inner and outer covers (6) and welded to each other, wherein a welding angle (1) is formed between the mounting cover (5) and the inner cover (7), wherein a first plastic strip (2), a second plastic strip (3) and a third plastic strip (4) are injection-molded in the welding angle (1), wherein the first plastic strip (2) is located between the outer cover (6) and the inner cover (7), wherein the lower side wall of the first plastic strip (2) is flush with the upper side wall of the inner cover (7), wherein the upper side wall of the first plastic strip (2) is lower than or flush with the lower side wall of the outer cover (6), wherein the lower side wall and the upper side of the first plastic strip (2) form an arc surface, wherein the upper side wall of the first plastic strip (2) and the side wall of the mounting cover (5) form an angle of 20°, wherein the lower side wall of the first plastic strip (2) and the side wall of the mounting cover (5) form an angle of 45°, wherein the lower side wall of the second plastic strip (3) and the side wall of the mounting cover (5) form an arc surface, wherein the lower side wall of the first plastic strip (2) and the side wall of the mounting cover (5) form an angle of 20°, wherein the lower side wall of the first plastic strip (2) and the side wall of the mounting cover (5) form an angle of 45°, wherein the lower side wall of the second plastic strip (3 ... first plastic strip (2) and the side wall of the mounting cover (5) form an angle of 45°, wherein the lower side wall of the second plastic strip The second plastic strip (3) is arranged between the first plastic strip (2), the inner cover (7) and the outer cover (6); the upper part of the second plastic strip (3) is in contact with the inner side surface of the outer cover (6); the lower part of the second plastic strip (3) is in contact with the inner side surface of the inner cover (7); the angle between the two side surfaces of the second plastic strip (3) is 45°; the third plastic strip (4) is in contact with the outer cover (6), the outer cover (6), the second plastic strip (3) and the first plastic strip (2) at the same time; the angle between the surface of the third plastic strip (4) in contact with the outer cover (6), the inner cover (7) and the first plastic strip (2) is 45°; the angle between the third plastic strip (4) and the welding angle (1) is 45°; the lower side surfaces of the first plastic strip (2), the second plastic strip (3) and the third plastic strip (4) are located at the same height; the lower side surface of the first plastic strip (2) is folded toward the outer cover (6) and the angle between the lower side surface and the outer cover (6) is 40-50°.

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