Integrally-formed rubber coating injection molding automobile wheel trim and injection molding process thereof

Abstract

The invention relates to the field of automobile wheel eyebrows, in particular to an integrally-formed rubber coating injection molding automobile wheel eyebrow and an injection molding process thereof.The integrally-formed rubber coating injection molding automobile wheel eyebrow comprises a wheel eyebrow inner plate used for being connected with an automobile body, and the outer side of the wheel eyebrow inner plate is connected with a wheel eyebrow outer plate used for decoration in a rubber coating injection molding mode; the boss is integrally arranged on the side, close to the wheel eyebrow outer plate, of the wheel eyebrow inner plate in the length direction of the wheel eyebrow inner plate, the boss is arranged in an S shape, and the product bonding is firmer after rubber coating injection molding is conducted, according to the integrally-formed rubber coating injection molding automobile wheel eyebrow, the integrated boss is arranged on the side, close to the wheel eyebrow outer plate, of the wheel eyebrow inner plate, and the boss is arranged in an S shape, so that the product bonding is firmer; the design not only is attractive, but also can enhance the bonding firmness of a product after rubber coating injection molding, so that the overall structural stability and durability of the automobile wheel trim are improved.

Description

Technical Field

[0001] The present invention relates to the field of automotive wheel arches, and specifically to an integrally formed overmolded automotive wheel arch and its injection molding process. Background Art

[0002] For automotive wheel arch products, the inner panel and the outer panel of the wheel arch are bonded together by 3M glue through pressing. This manufacturing method requires post-treatment processes such as pressing, pasting 3M tape, and tearing off the tape film. There are many manufacturing processes, which require the participation of personnel in multiple trades and has a high production cost.

[0003] Therefore, it is necessary to provide an integrally formed overmolded automotive wheel arch and its injection molding process to solve the above technical problems. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides an integrally formed overmolded automotive wheel arch and its injection molding process.

[0005] An integrally formed overmolded automotive wheel arch provided by the present invention includes an inner wheel arch panel for connecting with the vehicle body. An outer wheel arch panel for decoration is connected to the outer side of the inner wheel arch panel through overmolding. A convex platform is integrally provided on one side of the inner wheel arch panel close to the outer wheel arch panel along the length direction of the inner wheel arch panel. The convex platform is arranged in an S shape, and the product is more firmly bonded after overmolding.

[0006] During production, the mold first injects the inner wheel arch panel. After the injection of the inner wheel arch panel is completed, the mold rotates, and the outer wheel arch panel is formed by overmolding on the inner wheel arch panel. After the injection is completed, the mold ejects, and the molded part is a complete assembly of the inner wheel arch panel and the outer wheel arch panel; the process of sticking 3M glue to the inner panel, the 3M glue, and the pressing process are omitted.

[0007] Preferably, a plurality of threaded sleeve parts are provided on the side of the inner wheel arch panel facing away from the outer wheel arch panel, which is convenient for fixing the automotive wheel arch through screws. A reinforcing rib is provided at the connection between the threaded sleeve part and the inner wheel arch panel to improve the connection strength. A first chamfer is provided at the end of the threaded sleeve part for convenient installation and positioning.

[0008] Preferably, a plurality of square positioning cylinders are provided on the side of the inner wheel arch panel facing away from the outer wheel arch panel. The heights of two adjacent sides of the square positioning cylinder are different, and the positioning effect is better.

[0009] Preferably, a plurality of buckle mounting seats are integrally provided on the side of the inner wheel arch panel facing away from the outer wheel arch panel. An open mounting hole is provided on the buckle mounting seat, which is convenient for installing buckles.

[0010] Preferably, a second chamfer is provided at the opening of the mounting hole for convenient installation of the buckle. An anti - detachment protrusion is provided on the buckle mounting seat to prevent the buckle from detaching from the mounting hole.

[0011] An integrally formed overmolding injection molding process for automotive wheel arches, comprising the following steps:

[0012] S1; Preparation stage

[0013] Mold preparation: Ensure that the mold is clean and undamaged. Pay special attention to checking the mold conditions of key parts such as the inner panel 1 of the wheel arch, the boss 3, the threaded sleeve part 4, the square positioning cylinder 7, and the buckle mounting seat 8.

[0014] Material preparation: Select suitable plastic raw materials. Considering that the product needs to have good bonding performance and decorative effects, specific engineering plastics may need to be selected.

[0015] S2; Injection molding of the inner panel 1 of the wheel arch

[0016] Injection molding: Add the selected plastic raw materials into the injection molding machine and perform injection molding according to the preset parameters to form the inner panel 1 of the wheel arch. This step needs to ensure the one-time precise molding of structures such as the boss 3, the threaded sleeve part 4, the square positioning cylinder 7, and the buckle mounting seat 8.

[0017] Cooling and solidifying: Let the inner panel 1 of the wheel arch cool and solidify fully in the mold to ensure its stable shape and dimensional accuracy.

[0018] S3; Mold conversion and overmolding injection molding

[0019] Mold rotation: Adopt the rotatable mold technology to rotate the formed inner panel of the wheel arch to the specified position to prepare for the subsequent overmolding injection molding.

[0020] Surface treatment (if necessary): Perform appropriate surface treatment (such as flame treatment or corona treatment) on the surface of the inner panel of the wheel arch to be overmolded to improve the bonding firmness.

[0021] Overmolding injection molding: Through the overmolding injection molding process, cover a layer of highly decorative material on the inner panel of the wheel arch to form the outer panel of the wheel arch, ensure seamless connection between the two layers, and enhance the bonding force by using the S-shaped boss at the same time.

[0022] S4; Demolding and inspection of the finished product

[0023] Automatic ejection: After the overmolding injection molding is completed, the mold automatically ejects the finished product to ensure the tight combination of the inner panel 1 and the outer panel of the wheel arch.

[0024] Quality inspection: Conduct a comprehensive quality inspection on the finished product, including appearance inspection, dimensional measurement, and bonding strength testing, etc., to ensure that every detail meets the standards.

[0025] S5; Follow-up treatment

[0026] Deburring: If there are any excess plastic edges or burrs, appropriate tools should be used to remove them.

[0027] Assembly preparation: Conduct final cleaning and inspection on the screw holes, positioning cylinders, buckle mounting seats, etc. on the wheel arch to ensure the smooth progress of subsequent assembly.

[0028] Compared with related technologies, the present invention has the following beneficial effects:

[0029] 1. Enhance structural stability and firmness:

[0030] By providing an integral boss on the side of the inner panel of the wheel arch close to the outer panel of the wheel arch, and the boss is arranged in an S shape. This design is not only beautiful, but also can enhance the bonding firmness of the product after overmolding, thereby improving the overall structural stability and durability of the automotive wheel arch.

[0031] 2. Optimize the production process and improve efficiency:

[0032] Adopt an integral overmolding process. The mold first injects the inner panel of the wheel arch, and then rotates the mold to overmold on the inner panel of the wheel arch to form the outer panel of the wheel arch. This continuous injection process eliminates the traditional process of pasting 3M glue on the inner panel and its pressing process, greatly simplifies the production process, and improves the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 is a schematic diagram of the inner panel structure of the wheel arch of the present invention;

[0035] Figure 3 is a schematic diagram of the outer panel structure of the wheel arch of the present invention;

[0036] Figure 4 is a partial schematic diagram of the inner panel structure of the wheel arch of the present invention.

[0037] Reference numerals in the figures: 1, inner panel of the wheel arch; 2, outer panel of the wheel arch; 3, boss; 4, threaded sleeve part; 5, reinforcing rib; 6, first chamfer; 7, square positioning cylinder; 8, buckle mounting seat; 9, mounting hole; 10, second chamfer; 11, anti - detachment protrusion. DETAILED DESCRIPTION OF THE INVENTION

[0038] The present invention will be further described below with reference to the drawings and embodiments.

[0039] Please refer to Figures 1 - Figure 4, An integrally formed overmolded automotive wheel arch, including a wheel arch inner panel 1 for tightly connecting with the vehicle body. On the outer side of the wheel arch inner panel 1, through an advanced overmolding process, a highly decorative wheel arch outer panel 2 is connected. It should be noted that on the side of the wheel arch inner panel 1 close to the wheel arch outer panel 2, an integral boss 3 is ingeniously designed along its length direction. The boss 3 is arranged in an elegant S shape. This design is not only beautiful but also greatly enhances the bonding firmness of the product after overmolding.

[0040] During the production process, the mold first precisely injects the wheel arch inner panel 1. After the wheel arch inner panel 1 is injection-molded, the mold rotates, and then the wheel arch outer panel 2 is seamlessly formed on the wheel arch inner panel 1 through overmolding technology. After this continuous injection process is completed, the mold automatically ejects the finished product. At this time, a complete assembly of the wheel arch inner panel 1 and the wheel arch outer panel 2 is successfully born. This technological innovation eliminates the traditional process of pasting 3M glue on the inner panel and its pressing process, greatly improving the production efficiency.

[0041] Furthermore, on the side of the wheel arch inner panel 1 facing away from the wheel arch outer panel 2, a number of threaded sleeve parts 4 are carefully arranged. The existence of these threaded sleeve parts 4 enables the automotive wheel arch to be easily fixed with screws, making the installation process more convenient and rapid. To ensure the strength and stability of the connection, a reinforcing rib 5 is specially added at the connection between the threaded sleeve part 4 and the wheel arch inner panel 1. In addition, a first chamfer 6 is ingeniously designed at the end of the threaded sleeve part 4. This detail not only facilitates the installation positioning but also improves the overall assembly efficiency.

[0042] On the side of the wheel arch inner panel 1 facing away from the wheel arch outer panel 2, a series of square positioning cylinders 7 are also ingeniously provided. The adjacent sides of these square positioning cylinders 7 have different heights. This unique design makes the positioning effect more accurate and reliable, ensuring the stability and accuracy of the wheel arch during the installation process.

[0043] In addition, a number of buckle mounting seats 8 are integrally arranged on the side of the wheel arch inner panel 1 facing away from the wheel arch outer panel 2. Open mounting holes 9 are ingeniously provided on these buckle mounting seats 8. This design greatly facilitates the installation process of the buckles. To ensure the stability of the buckles in the mounting holes 9, a second chamfer 10 is specially provided at the opening of the mounting holes 9. At the same time, anti - detachment protrusions 11 are ingeniously added on the buckle mounting seats 8. This detail effectively prevents the buckles from accidentally detaching from the mounting holes 9 during the installation process, further enhancing the overall stability and safety.

[0044] An integrally formed overmolded automotive wheel arch injection - molding process includes the following steps:

[0045] S1; Preparation stage

[0046] Mold Preparation: Ensure that the mold is clean and undamaged. Pay special attention to checking the mold conditions of key parts such as the inner fender panel 1, boss 3, threaded sleeve part 4, square positioning cylinder 7, and buckle mounting seat 8.

[0047] Material Preparation: Select suitable plastic raw materials. Considering that the product needs to have good bonding properties and decorative effects, specific engineering plastics may need to be selected.

[0048] S2; Injection Molding of Inner Fender Panel 1

[0049] Injection Molding: Add the selected plastic raw materials into the injection molding machine and perform injection molding according to the preset parameters to form the inner fender panel 1. This step needs to ensure the one-time accurate molding of structures such as the boss 3, threaded sleeve part 4, square positioning cylinder 7, and buckle mounting seat 8.

[0050] Cooling and Solidifying: Let the inner fender panel 1 cool and solidify fully in the mold to ensure its stable shape and dimensional accuracy.

[0051] S3; Mold Conversion and Overmolding

[0052] Mold Rotation: Adopt the rotatable mold technology to rotate the formed inner fender panel 1 to the designated position to prepare for the subsequent overmolding.

[0053] Surface Treatment (if necessary): Perform appropriate surface treatment (such as flame treatment or corona treatment) on the surface of the inner fender panel 1 to be overmolded to improve the bonding strength.

[0054] Overmolding: Through the overmolding process, cover a layer of highly decorative material on the inner fender panel 1 to form the outer fender panel 2, ensure seamless connection between the two layers, and use the S-shaped boss 3 to enhance the bonding force.

[0055] S4; Demolding and Inspection of Finished Product

[0056] Automatic Ejection: After overmolding, the mold automatically ejects the finished product to ensure the tight combination of the inner fender panel 1 and the outer fender panel 2.

[0057] Quality Inspection: Conduct a comprehensive quality inspection on the finished product, including appearance inspection, dimensional measurement, and bonding strength testing, etc., to ensure that every detail meets the standards.

[0058] S5; Subsequent Processing

[0059] Deburring: If there are any excess plastic edges or burrs, appropriate tools should be used to remove them.

[0060] Assembly Preparation: Conduct final cleaning and inspection on the screw holes, positioning cylinders, and buckle mounting seats on the fender to ensure the smooth progress of subsequent assembly.

[0061] The above are only embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present invention.

Claims

1. An integrally formed overmolded automotive wheel arch, characterized in that, It includes an inner fender panel (1) for connecting with the vehicle body. An outer fender panel (2) for decoration is connected to the outer side of the inner fender panel (1) by overmolding. A boss (3) is integrally provided on one side of the inner fender panel (1) close to the outer fender panel (2) along the length direction of the inner fender panel (1), and the boss (3) is arranged in an S shape.

2. The integrally molded overmolded automotive wheel arch according to claim 1, characterized in that, On the side of the inner fender panel (1) facing away from the outer fender panel (2), there are a number of threaded sleeve parts (4). A reinforcing rib (5) is provided at the connection of the threaded sleeve part (4) and the inner fender panel (1), and a first chamfer (6) is provided at the end of the threaded sleeve part (4).

3. The integrally molded overmolded automotive wheel arch according to claim 1, characterized in that, On the side of the inner fender panel (1) facing away from the outer fender panel (2), there are a number of square positioning cylinders (7), and the heights of two adjacent sides of the square positioning cylinder (7) are different.

4. The integrally formed overmolded automotive wheel arch according to claim 1, wherein On the side of the inner fender panel (1) facing away from the outer fender panel (2), a number of buckle mounting seats (8) are integrally provided, and an open mounting hole (9) is provided on the buckle mounting seat (8).

5. The integrally molded overmolded automotive wheel arch according to claim 4, wherein, A second chamfer (10) is provided at the opening of the mounting hole (9), and an anti - detachment protrusion (11) is provided on the buckle mounting seat (8).

6. The integrated overmolding injection molding process for automotive wheel arches according to any one of claims 1-5, characterized in that, It includes the following steps: S1; Preparation stage Mold preparation: Ensure that the mold is clean and undamaged. Pay special attention to checking the mold status of key parts such as the inner fender panel 1, the boss 3, the threaded sleeve part 4, the square positioning cylinder 7 and the buckle mounting seat 8. Material preparation: Select suitable plastic raw materials. Considering that the product needs to have good bonding performance and decorative effect, specific engineering plastics may need to be selected. S2; Injection molding of the inner fender panel 1 Injection molding: Add the selected plastic raw material into the injection molding machine and perform injection molding according to the preset parameters to form the inner fender panel 1. This step needs to ensure the one - time accurate molding of structures such as the boss 3, the threaded sleeve part 4, the square positioning cylinder 7 and the buckle mounting seat 8. Cooling and curing: Let the inner fender panel 1 fully cool and cure in the mold to ensure its stable shape and dimensional accuracy. S3; Mold conversion and overmolding Mold rotation: Adopt the rotatable mold technology to rotate the formed inner fender panel 1 to the specified position to prepare for the subsequent overmolding. Surface treatment (if necessary): Perform appropriate surface treatment (such as flame treatment or corona treatment) on the surface of the inner fender panel 1 to be overmolded to improve the bonding strength. Overmolding: Through the overmolding process, cover a layer of highly decorative material on the inner fender panel 1 to form the outer fender panel 2, ensure seamless connection between the two layers, and at the same time use the S - shaped boss 3 to enhance the bonding force. S4; Demolding and inspection of the finished product Automatic ejection: After overmolding, the mold automatically ejects the finished product to ensure the tight combination of the inner fender panel 1 and the outer fender panel 2. Quality inspection: Conduct a comprehensive quality inspection on the finished product, including appearance inspection, dimension measurement and bonding strength test, etc., to ensure that every detail meets the standards. S5; Follow - up treatment Deburring: If there are any excess plastic edges or burrs, appropriate tools should be used to remove them. Assembly preparation: Conduct final cleaning and inspection on the screw holes, positioning cylinders and buckle mounting seats on the fender to ensure the smooth progress of subsequent assembly.

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