Double-color foaming steering wheel and preparation method for manufacturing double-color foaming steering wheel

Abstract

The invention provides a double-color foaming steering wheel and a preparation method for manufacturing the double-color foaming steering wheel, and the double-color foaming steering wheel comprises a framework, a first-color foaming body, a second-color foaming body and a limiting structure; the first-color foaming body wraps a handle ring part of the framework through a first-time foaming process; the first-color foaming body is provided with a preset fixing structure, and the preset fixing structure is provided with a limiting structure; the preset fixing structure is wrapped with the second-color foaming body through the second-time foaming process, and the second-color foaming body and the first-color foaming body are connected through the limiting structure to form the double-color foaming steering wheel. The first-color foaming body wraps the handle ring part through the first-time foaming process, and then the second-color foaming body wraps the preset fixing structure through the second-time foaming process on the preset fixing structure of the first-color foaming body, so that the double-color foaming steering wheel is formed. The first-color foaming body and the second-color foaming body achieve appearance modeling individuation through a secondary foaming process, and the color individuation requirement is met by combining an in-mold paint spraying process.

Description

Technical Field

[0001] This application relates to the technical field of automotive steering wheels, and particularly to a two-color foamed steering wheel, a preparation method for manufacturing the two-color foamed steering wheel, and another preparation method for manufacturing the two-color foamed steering wheel. Background Art

[0002] The automotive steering wheel is an indispensable part of automotive components. With the continuous improvement of the end-users' requirements for vehicle functional configurations, the functions of automotive steering wheels are gradually increasing. Coupled with the fact that the steering wheel belongs to the exterior parts, its appearance shape is also becoming more personalized and diversified. For example, to achieve multiple colors for a normal steering wheel, it is generally achieved by wrapping the steering wheel with leather of different colors to meet the customers' requirements for personalized colors. However, this method requires the use of leather of different colors, increasing the number of wrapping segments of the leather and the wrapping man-hours, resulting in a relatively high cost.

[0003] Therefore, how to improve the manufacturing efficiency of the steering wheel and reduce the manufacturing cost while meeting the personalized requirements during the manufacturing process of the steering wheel has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] This application provides a two-color foamed steering wheel to solve the problem of how to improve the manufacturing efficiency of the steering wheel and reduce the manufacturing cost while meeting the personalized requirements during the manufacturing process of the steering wheel in the prior art. This application also provides two preparation methods for manufacturing the two-color foamed steering wheel.

[0005] This application provides a two-color foamed steering wheel, including: a skeleton, a first-color foaming body, a second-color foaming body, and a limiting structure arranged on the first-color foaming body;

[0006] The first-color foaming body is wrapped around the grip part of the skeleton through a first foaming process; the first-color foaming body has a preset fixing structure, and the limiting structure is arranged on the preset fixing structure;

[0007] The second-color foaming body is wrapped around the preset fixing structure through a second foaming process, and the second-color foaming body is connected to the first-color foaming body through the limiting structure to form a two-color foamed steering wheel.

[0008] Optionally, the preset fixing structures of the first-color foaming body are set to two, and the radial dimension of the preset fixing structure of the first-color foaming body is smaller than the radial dimension of the first-color foaming body, so that the preset fixing structure of the first-color foaming body is in a concave shape on the first-color foaming body; correspondingly,

[0009] The second-color foams are provided in two numbers, and each of the second-color foams is correspondingly arranged in a preset fixing structure of each of the first-color foams.

[0010] Optionally, it further includes:

[0011] An installation gap is formed at both ends of the first-color foam relative to the second-color foam in the preset fixing structure in the axial direction; the installation gap is provided in four numbers;

[0012] A decorative part, the decorative part is in a ring buckle shape, and the decorative part is buckled in the installation gap.

[0013] Optionally, the limiting structure includes: a first limiting groove and a second limiting groove;

[0014] The first limiting groove is recessed in the installation gap, and the first limiting groove is relatively arranged on both sides of the preset fixing structure; the first limiting groove can accommodate the opposite ends of the second-color foam to limit the degrees of freedom of the second-color foam in the axial direction and the radial direction;

[0015] The second limiting groove is vertically recessed in the preset fixing structure; the second limiting groove can accommodate a part of the handle ring part of the second-color foam to limit the degree of freedom of the second-color foam in the axial direction.

[0016] The present application provides a preparation method for manufacturing a two-color foam steering wheel, which can manufacture the two-color foam steering wheel as described above, including:

[0017] Select a first-color mold and perform a first in-mold paint spraying treatment on the first-color mold;

[0018] Place the skeleton of the steering wheel into the first-color mold for positioning, and after preheating the first-color mold, inject first-color polyurethane into the handle ring part of the skeleton, and demold after heat preservation and curing to form a first-color foam on the handle ring part of the skeleton; a limiting structure is formed in the preset fixing structure of the first-color foam;

[0019] Select a second-color mold and perform a second in-mold paint spraying treatment on the second-color mold;

[0020] Place the skeleton and the first-color foam into the second-color mold and position and fix them. After preheating the second-color mold, inject second-color polyurethane into the preset fixing structure of the first-color foam, and demold after heat preservation and curing to form a second-color foam in the preset fixing structure of the first-color foam. The second-color foam and the first-color foam are connected through the limiting structure to form a two-color foam steering wheel.

[0021] Optionally, a first in-mold paint spraying treatment is performed on the first-color mold, including:

[0022] Spray a mold release agent on the base surface of the first-color mold, and then spray a first-color environmentally friendly in-mold paint on the base surface of the first-color mold;

[0023] Correspondingly, the first in-mold paint spraying treatment on the second-color mold includes:

[0024] Spray a mold release agent on the base surface of the second-color mold, and then spray a second-color environmentally friendly in-mold paint on the base surface of the second-color mold;

[0025] Optionally, the preheating temperature of the first-color mold and the preheating temperature of the second-color mold are 60-70 °C.

[0026] Optionally, the first-color polyurethane and the second-color polyurethane each include a two-component polyurethane of A component and B component, and the ratio of the A component to the B component is 7:4.

[0027] Optionally, the heat preservation and curing time of each of the first-color mold and the second-color mold is 90 seconds.

[0028] Optionally, the preset fixing structure of the first-color foam is set to two; the radial dimension of the preset fixing structure of the first-color foam is smaller than the radial dimension of the first-color foam, so that the preset fixing structure of the first-color foam is recessed relative to the first-color foam.

[0029] Optionally, the limiting structure includes: a first limiting groove and a second limiting groove;

[0030] The first limiting groove is recessed in the installation gap, and the first limiting groove is oppositely arranged on both sides of the preset fixing structure; the first limiting groove can accommodate the opposite ends of the second-color foam to limit the freedom degree of the second-color foam in the radial direction;

[0031] The second limiting groove is vertically recessed in the preset fixing structure; the second limiting groove can accommodate a part of the handle ring portion of the second-color foam to limit the freedom degree of the second-color foam in the axial direction.

[0032] Optionally, it further includes:

[0033] An installation gap is formed in the preset fixing structure at both ends of the first-color foam relative to the second-color foam in the axial direction; the installation gap is set to four;

[0034] A decorative part, which is formed by injection molding; the decorative part is in a ring buckle shape, and the decorative part is buckled in the installation gap.

[0035] The present application also provides a preparation method for manufacturing a two-color foamed steering wheel, including:

[0036] Select a first-color mold and perform in-mold paint spraying treatment on the first-color mold;

[0037] Place the skeleton of the steering wheel into the first-color mold for positioning. After pre-heating the first-color mold, inject the first-color polyurethane into the grip part of the skeleton. After heat preservation and curing, demold to form a first-color steering wheel on the grip part of the skeleton; a limiting structure is formed on the preset fixing structure of the first-color steering wheel;

[0038] Cover the part outside the preset fixing structure of the first-color steering wheel and spray a second-color paint on the preset fixing structure to form a two-color foamed steering wheel.

[0039] Optionally, the first in-mold paint spraying treatment on the first-color mold includes:

[0040] Spray a release agent on the base surface of the first-color mold, and then spray a first-color environment-friendly in-mold paint on the base surface of the first-color mold.

[0041] Optionally, the pre-heating temperature of the first-color mold is 60-70°C.

[0042] Optionally, the first-color polyurethane includes a two-component polyurethane of A material and B material, and the ratio of the A material to the B material is 7:4.

[0043] Optionally, the heat preservation and curing time in the first-color mold is 90 seconds.

[0044] Compared with the prior art, the present application has the following advantages:

[0045] The present application provides a two-color foamed steering wheel, which can manufacture the two-color foamed steering wheel as described above, including: a skeleton, a first-color foam body, a second-color foam body, and a limiting structure provided on the first-color foam body. Among them, the first-color foam body wraps the grip part of the skeleton through a first foaming process. The first-color foam body has a preset fixing structure, and the limiting structure is provided on the preset fixing structure. The second-color foam body wraps the preset fixing structure through a second foaming process, and the second-color foam body is connected to the first-color foam body through the limiting structure to form a two-color foamed steering wheel.

[0046] It can be understood that for the two-color foamed steering wheel provided in this application, the first-color foamed body is wrapped around the grip part of the skeleton through the first foaming process, and then the second-color foamed body is wrapped around the preset fixing structure through the second foaming process at the preset fixing structure of the first-color foamed body to form a two-color foamed steering wheel. The first-color foamed body and the second-color foamed body achieve personalized appearance styling through the two-step foaming process, and then combine with the in-mold painting process to meet the personalized color requirements. Moreover, the two-step foaming process improves the processing efficiency of the steering wheel and can also reduce the manufacturing cost. In addition, the second-color foamed body and the first-color foamed body are connected through a limiting structure to form a two-color foamed steering wheel, making the manufacturing of the two-color foamed steering wheel more stable, thereby improving the manufacturing quality of the two-color foamed steering wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 FIG. is a schematic structural diagram of a two-color foamed steering wheel provided by the first embodiment of the present application.

[0048] Figure 2 FIG. is an exploded view of the two-color foamed steering wheel provided by the first embodiment of the present application.

[0049] Figure 3 FIG. is Figure 1 a schematic structural diagram of the perspective A-A in FIG.

[0050] Figure 4 FIG. is a schematic structural diagram of the two-color foamed steering wheel from another angle provided by the first embodiment of the present application.

[0051] Figure 5 FIG. is Figure 4 an enlarged schematic view of part B in FIG.

[0052] Figure 6 FIG. is a schematic structural diagram of the two-color foamed steering wheel from yet another angle provided by the first embodiment of the present application.

[0053] Figure 7 FIG. is Figure 6 a cross-sectional view of the perspective C-C in FIG.

[0054] Figure 8 FIG. is a flowchart of a preparation method for manufacturing a two-color foamed steering wheel provided by the second embodiment of the present application.

[0055] Figure 9 FIG. is a flowchart of a preparation method for manufacturing a two-color foamed steering wheel provided by the second embodiment of the present application.

[0056] Reference Signs:

[0057] Skeleton 10, grip part 101, first-color foam 20, preset fixing structure 30, second-color foam 40, decorative part 50, installation gap 60, limiting structure 70, first limiting groove 701, second limiting groove 702. Detailed implementation

[0058] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementations disclosed below.

[0059] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0060] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0061] The automotive steering wheel is an indispensable part of automotive components. With the continuous improvement of the terminal users' requirements for vehicle functional configurations, the functions of the automotive steering wheel are gradually increasing. Coupled with the fact that the steering wheel belongs to an exterior part, its appearance is becoming more personalized and diversified. For example, to achieve multiple colors for a normal steering wheel, generally different-color leathers are used to wrap the steering wheel to meet the users' needs for personalized colors. However, this method requires the use of different-color leathers, increasing the number of wrapping segments of the leather and the wrapping working hours, resulting in a relatively high cost.

[0062] Therefore, the present application provides a two-color foam steering wheel, including: a skeleton, a first-color foam, a second-color foam, and a limiting structure provided on the first-color foam. Among them, the first-color foam is wrapped around the grip part of the skeleton through a first foaming process. The first-color foam has a preset fixing structure, and the limiting structure is provided on the preset fixing structure. The second-color foam is wrapped around the preset fixing structure through a second foaming process, and the second-color foam is connected to the first-color foam through the limiting structure to form a two-color foam steering wheel.

[0063] It can be understood that for the two-color foamed steering wheel provided by the present application, the first-color foamed body is wrapped around the grip portion of the skeleton through the first foaming process, and then the second-color foamed body is wrapped around the preset fixing structure through the second foaming process at the preset fixing structure of the first-color foamed body to form a two-color foamed steering wheel. The first-color foamed body and the second-color foamed body achieve personalized appearance styling through the secondary foaming process, and then combine with the in-mold painting process to meet the personalized color requirements. Moreover, the secondary foaming process improves the processing efficiency of the steering wheel and can also reduce the manufacturing cost. In addition, the second-color foamed body and the first-color foamed body are connected through a limiting structure to form a two-color foamed steering wheel, making the manufacturing of the two-color foamed steering wheel more stable, thereby improving the manufacturing quality of the two-color foamed steering wheel.

[0064] Next, the sealing component provided by the present application will be described in detail with reference to the accompanying drawings. Among them, Figure 1 is a schematic structural diagram of a two-color foamed steering wheel provided by the first embodiment of the present application. Figure 2 is an exploded view of the two-color foamed steering wheel provided by the first embodiment of the present application. Figure 3 is Figure 1 a schematic structural diagram of the view from the A-A perspective in Figure 4 is a schematic structural diagram of the two-color foamed steering wheel from another angle provided by the first embodiment of the present application. Figure 5 is Figure 4 an enlarged schematic view of part B in Figure 6 is a schematic structural diagram of the two-color foamed steering wheel from yet another angle provided by the first embodiment of the present application. Figure 7 is Figure 6 a cross-sectional view of the C-C perspective in Figure 8 is a flowchart of a preparation method for manufacturing a two-color foamed steering wheel provided by the second embodiment of the present application. Figure 9 is a flowchart of a preparation method for manufacturing a two-color foamed steering wheel provided by the second embodiment of the present application.

[0065] First Embodiment

[0066] As Figures 1 to 7 shown, the present application provides a two-color foamed steering wheel, including: a skeleton 10, a first-color foamed body 20, a second-color foamed body 40, and a limiting structure 70 provided on the first-color foamed body 20. Among them, the first-color foamed body 20 is wrapped around the grip portion 101 of the skeleton 10 through the first foaming process. The first-color foamed body 20 has a preset fixing structure 30, and the limiting structure 70 is provided on the preset fixing structure 30. The second-color foamed body 40 is wrapped around the preset fixing structure 30 through the second foaming process, and the second-color foamed body 40 and the first-color foamed body 20 are connected through the limiting structure 70 to form a two-color foamed steering wheel.

[0067] Specifically, in this embodiment, the skeleton 10 includes a grip loop portion 101 in a loop shape, and the first-color foaming body 20 is wrapped around the grip loop portion 101 of the skeleton 10 through a first foaming process. In an example, based on the loop shape of the grip loop portion 101 of the skeleton 10, when the first-color foaming body 20 is wrapped around the grip loop portion 101 of the skeleton 10 through the first foaming process, the formed first-color foaming body 20 is in a sleeve shape.

[0068] Meanwhile, the first-color foaming body 20 has a preset fixing structure 30. The preset fixing structure 30 is a part of the structure of the first-color foaming body 20. Specifically, the radial dimension of the preset fixing structure 30 of the first-color foaming body 20 is smaller than the radial dimension of the first-color foaming body 20, so that the preset fixing structure 30 of the first-color foaming body 20 is in a concave shape on the first-color foaming body 20. In an example, the preset fixing structure 30 of the first-color foaming body 20 is set to two. Among them, the preset fixing structure 30 of the first-color foaming body 20 is the position where the steering wheel is held by hand, and is distributed on the first-color foaming body 20 at intervals according to the two hands holding the first-color foaming body 20. In other examples, the preset fixing structure 30 of the first-color foaming body 20 is set to one or more than two. For example, when the preset fixing structure 30 of the first-color foaming body 20 is set to three, the preset fixing structure 30 of the first-color foaming body 20 is equally distributed on the first-color foaming body 20 at an angle of 120 degrees around the center point of the skeleton 10.

[0069] Correspondingly, when the preset fixing structure 30 of the first-color foaming body 20 is set to two, the second-color foaming bodies 40 are set to two, and each second-color foaming body 40 is correspondingly arranged at each preset fixing structure 30 of the first-color foaming body 20. In an example, the second-color foaming body 40 is wrapped around the preset fixing structure 30 through a second foaming process. Specifically, the second-color foaming body 40 is manufactured into a sleeve structure, that is, the second-color foaming body 40 is arranged at each preset fixing structure 30 of the first-color foaming body 20 in a sleeved manner during the second foaming process. When the second-color foaming body 40 is installed at the preset fixing structure 30 of the first-color foaming body 20, the outer contact surface of the second-color foaming body 40 and the outer contact surface of the first-color foaming body 20 are on the same end face.

[0070] In this embodiment, the colors of the first-color foaming body 20 and the second-color foaming body 40 are preferably set to different colors. Or the colors of the first-color foaming body 20 and the second-color foaming body 40 are set to the same color.

[0071] In this embodiment, a limiting structure 70 is provided in the preset fixing structure 30 of the first-color foam body 20. Specifically, the limiting structure 70 includes a first limiting groove 701 and a second limiting groove 702. Specifically, the first limiting groove 701 is recessed in the installation gap 60 and is oppositely arranged on both sides of the preset fixing structure 30. The first limiting groove 701 can accommodate the opposite ends of the second-color foam body 40 to limit the freedom degree of the second-color foam body 40 in the radial direction. This setting method effectively improves the anti-offset performance of the second-color foam body 40 during operation by enhancing the torsional resistance of the cross-section of the second-color foam body 40. The combination of the first-color foam body 20 and the second-color foam body 40 enhances the rigidity of the overall structure of the grip portion 101 of the skeleton 10, thereby providing a more stable operation experience when the user turns the steering wheel. The second limiting groove 702 is vertically recessed in the preset fixing structure 30, and the second limiting groove 702 can accommodate a part of the grip portion of the second-color foam body 40 to limit the freedom degree of the second-color foam body 40 in the axial direction. Specifically, the part of the second limiting groove 702 that can accommodate the grip portion of the second-color foam body 40 is that several grooves are provided on the contact surface between the first-color foam body 20 and the second-color foam body 40. When the second-color foam body 40 is molded, the foaming material enters the second limiting groove 702 of the preset fixing structure 30 of the first-color foam body 20, thereby increasing the contact area and improving the adhesion between the first-color foam body 20 and the second-color foam body 40.

[0072] In this embodiment, an installation gap 60 and a decorative member 50 are further included. Among them, in the axial direction, the opposite ends of the first-color foam body 20 relative to the second-color foam body 40 form an installation gap 60 in the preset fixing structure 30. In one example, the installation gap 60 is set to 5 mm. The width of the installation gap 60 is not too wide, which can ensure the appearance beauty of the grip portion 101 of the skeleton 10. At the same time, the installation gap 60 can effectively prevent the second-color foam body 40 from leaking material, and can also avoid the paint of the second-color foam body 40 sticking to the first-color foam body 20 when the installation gap 60 is too narrow, thereby preventing color bleeding between the first-color foam body 20 and the second-color foam body 40. In one example, corresponding to the two second-color foam bodies 40 provided, four installation gaps 60 are provided.

[0073] The decorative member 50 is in a ring buckle shape, and the decorative member 50 is buckled in the installation gap 60. Corresponding to the four installation gaps 60 provided, four decorative members 50 are provided. In one example, when the decorative member 50 is buckled in the installation gap 60, the outer contact surface of the decorative member 50, the outer contact surface of the second-color foam body 40, and the outer contact surface of the first-color foam body 20 are on the same end surface, so that the outer contact surface of the grip portion of the formed two-color foam steering wheel is in a smooth state.

[0074] The present application provides a two-color foamed steering wheel, including: a skeleton 10, a first-color foamed body 20, a second-color foamed body 40, and a limiting structure 70 disposed on the first-color foamed body 20. Among them, the first-color foamed body 20 wraps the grip portion 101 of the skeleton 10 through a first foaming process. The first-color foamed body 20 has a preset fixing structure 30, and the limiting structure 70 is disposed on the preset fixing structure 30. The second-color foamed body 40 wraps the preset fixing structure 30 through a second foaming process, and the second-color foamed body 40 is connected to the first-color foamed body 20 through the limiting structure 70 to form a two-color foamed steering wheel.

[0075] It can be understood that for the two-color foamed steering wheel provided by the present application, the first-color foamed body 20 is wrapped around the grip portion 101 of the skeleton 10 through the first foaming process, and then the second-color foamed body 40 is wrapped around the preset fixing structure 30 through the second foaming process on the preset fixing structure 30 of the first-color foamed body 20 to form a two-color foamed steering wheel. The first-color foamed body 20 and the second-color foamed body 40 achieve personalized appearance styling through the two-stage foaming process, and then combine with the in-mold painting process to meet the personalized color requirements. Moreover, the two-stage foaming process improves the processing efficiency of the steering wheel and can also reduce the manufacturing cost. In addition, the second-color foamed body 40 is connected to the first-color foamed body 20 through the limiting structure 70 to form a two-color foamed steering wheel. This makes the manufacturing of the two-color foamed steering wheel more stable, thereby improving the manufacturing quality of the two-color foamed steering wheel.

[0076] Second Embodiment

[0077] The present application also provides a preparation method for manufacturing a two-color foamed steering wheel, as Figure 7 shown, Figure 7 is a flowchart of the preparation method for manufacturing a two-color foamed steering wheel provided by the second embodiment of the present application. The method includes the following steps:

[0078] Step S101, select a first-color mold and perform a first in-mold paint spraying treatment on the first-color mold.

[0079] In this step, the first-color mold is used to manufacture the first-color foamed body. After selecting the first-color mold, a first in-mold paint spraying treatment is performed on the first-color mold. Among them, performing a first in-mold paint spraying treatment on the first-color mold includes: spraying a release agent on the base surface of the first-color mold, and the release agent is used to separate the formed first-color foamed body (hereinafter) from the first-color mold. After spraying the release agent, a first-color environmentally friendly in-mold paint is sprayed on the base surface of the first-color mold. Among them, the base surface of the first-color mold includes the base surfaces of the upper mold and the lower mold of the first-color mold. The first-color environmentally friendly in-mold paint includes a first-color water-based environmentally friendly in-mold paint. In one example, the color of the first-color environmentally friendly in-mold paint is the same as the color of the first-color polyurethane (hereinafter).

[0080] Step S102, place the skeleton of the steering wheel into the first-color mold for positioning. After preheating the first-color mold, inject the first-color polyurethane into the grip part of the skeleton. After heat preservation and curing, demold to form a first-color foam body on the grip part of the skeleton; the preset fixing structure of the first-color foam body forms a limiting structure.

[0081] After spraying the mold release agent and the first-color environmentally friendly in-mold paint, place the skeleton of the steering wheel into the first-color mold for the first foaming. Specifically, place the skeleton of the steering wheel into the first-color mold for positioning. After preheating the first-color mold, inject the first-color polyurethane into the grip part of the skeleton. After heat preservation and curing, demold to form a first-color foam body on the grip part of the skeleton; the preset fixing structure of the first-color foam body forms a limiting structure.

[0082] Further, in this embodiment, a first positioning structure is correspondingly provided on the skeleton of the steering wheel and the first-color mold. Specifically, the first positioning structure includes a first positioning pin and a first positioning hole. Among them, the first positioning pin is provided on the first-color mold, the first positioning hole is provided on the skeleton of the steering wheel, and the first positioning pin and the first positioning hole are oppositely arranged. The first positioning pin is inserted into the first positioning hole to position the skeleton of the steering wheel in the first-color mold. After positioning the skeleton of the steering wheel in the first-color mold, preheat the first-color mold. In one example, the heating temperature for preheating the first-color mold is 60 - 70 °C. After preheating the first-color mold, inject the first-color polyurethane into the grip part of the skeleton. After heat preservation and curing, demold to form a first-color foam body on the grip part of the skeleton. In one example, the first-color polyurethane injected into the grip part of the skeleton includes two-component polyurethane of A material and B material, and the ratio of the A material to the B material is 7:4. In one example, the heat preservation and curing time of the first-color mold is 90 seconds.

[0083] In one example, after the first-color polyurethane is heat-preserved and cured and demolded to form a first-color foam body on the grip part of the skeleton, it is necessary to trim the formed first-color foam body.

[0084] In this embodiment, the first-color foam body has a preset fixing structure, which is a part of the first-color foam body. Specifically, the radial dimension of the preset fixing structure of the first-color foam body is smaller than the radial dimension of the first-color foam body, so that the preset fixing structure of the first-color foam body is recessed on the first-color foam body. In one example, the preset fixing structure of the first-color foam body is set to two. Among them, the preset fixing structure of the first-color foam body is the position for holding the steering wheel, and is distributed on the first-color foam body at intervals according to the two hands holding the first-color foam body. In other examples, the preset fixing structure of the first-color foam body is set to one or more than two. For example, when the preset fixing structure of the first-color foam body is set to three, the preset fixing structure of the first-color foam body is arranged on the first-color foam body at equal intervals with an included angle of 120 degrees according to the center point of the skeleton.

[0085] Step S103: Select a second-color mold and perform a second in-mold paint spraying treatment on the second-color mold.

[0086] After manufacturing and forming the first-color foam body, select a second-color mold and perform a second in-mold paint spraying treatment on the second-color mold.

[0087] In this step, the second-color mold is used to manufacture the second-color foam body. After selecting the second-color mold, a second in-mold paint spraying treatment is performed on the second-color mold. Among them, performing a second in-mold paint spraying treatment on the second-color mold includes: spraying a release agent on the base surface of the second-color mold, and the release agent is used to separate the formed second-color foam body (hereinafter) from the second-color mold. After spraying the release agent, spray a second-color environmentally friendly in-mold paint on the base surface of the second-color mold. Among them, the base surface of the second-color mold includes the base surfaces of the upper mold and the lower mold of the second-color mold. The second-color environmentally friendly in-mold paint includes a second-color water-based environmentally friendly in-mold paint. In one example, the color of the second-color environmentally friendly in-mold paint is the same as the color of the second-color polyurethane (hereinafter). The color of the second-color environmentally friendly in-mold paint is different from the color of the first-color environmentally friendly in-mold paint.

[0088] Step S104: Place the skeleton and the first-color foam body into the second-color mold and position and fix them. After preheating the second-color mold, inject second-color polyurethane into the preset fixing structure of the first-color foam body. After heat preservation and curing, demold to form a second-color foam body in the preset fixing structure, and the second-color foam body is connected to the first-color foam body through the limiting structure to form a two-color foam steering wheel.

[0089] After spraying the release agent and the second-color environmentally friendly in-mold paint, the first-color foam is placed into the second-color mold for the second foaming. Specifically, the skeleton and the first-color foam are placed into the second-color mold and positioned and fixed. After pre-heating the second-color mold, the second-color polyurethane is injected into the preset fixing structure of the first-color foam. After heat preservation and curing, demolding is carried out to form the second-color foam on the preset fixing structure. The second-color foam and the first-color foam are connected through a limiting structure to form a two-color foamed steering wheel.

[0090] Further, in this embodiment, the second positioning structures are correspondingly arranged on the skeleton of the steering wheel and the second-color mold. Specifically, the second positioning structure includes a second positioning pin and a second positioning hole. Among them, the second positioning pin is arranged on the second-color mold, the second positioning hole is arranged on the skeleton of the steering wheel, and the second positioning pin and the second positioning hole are arranged opposite to each other. The second positioning pin is inserted into the second positioning hole to position the skeleton of the steering wheel together with the first-color foam in the second-color mold. After positioning the skeleton of the steering wheel and the first-color foam in the second-color mold, the second-color mold is pre-heated. In one example, the heating temperature for pre-heating the second-color mold is 60-70 °C. After pre-heating the second-color mold, the second-color polyurethane is injected into the preset fixing structure of the first-color foam. After heat preservation and curing, demolding is carried out to form the second-color foam on the preset fixing structure of the first-color foam. In one example, the second-color polyurethane injected into the preset fixing structure of the first-color foam includes two-component polyurethane of A material and B material, and the ratio of the A material to the B material is 7:4. In one example, the heat preservation and curing time of the second-color mold is 90 seconds.

[0091] In one example, after the second-color polyurethane is heat-preserved and cured and demolded to form the second-color foam on the preset fixing structure of the first-color foam, it is necessary to trim the formed second-color foam.

[0092] In this embodiment, a preset fixing structure of the first-color foaming body forms a limiting structure 70. Specifically, the limiting structure includes a first limiting groove and a second limiting groove. Specifically, the first limiting groove is recessed in an installation gap (described below), and the first limiting grooves are oppositely arranged on both sides of the preset fixing structure. The first limiting grooves can accommodate opposite ends of the second-color foaming body to limit the freedom degree of the second-color foaming body in the radial direction. This setting method effectively improves the anti-offset performance of the grip portion of the skeleton during operation by enhancing the torsional resistance of the cross-section of the second-color foaming body. The combination of the first-color foaming body and the second-color foaming body enhances the rigidity of the overall structure of the grip portion of the skeleton, thereby providing a more stable operation experience when the user turns the steering wheel. The second limiting groove is vertically recessed in the preset fixing structure, and the second limiting groove can accommodate a part of the grip portion of the second-color foaming body to limit the freedom degree of the second-color foaming body in the axial direction. Among them, the specific situation that the second limiting groove can accommodate a part of the grip portion of the second-color foaming body is that several grooves are provided on the contact surface between the first-color foaming body and the second-color foaming body. When the second-color foaming body is molded, the foaming material enters the second limiting groove of the preset fixing structure of the first-color foaming body, thereby increasing the contact area and improving the adhesion between the first-color foaming body and the second-color foaming body.

[0093] In this embodiment, an installation gap and a decorative member are further included. Among them, in the axial direction, opposite ends of the first-color foaming body relative to the second-color foaming body form an installation gap in the preset fixing structure. In one example, the installation gap is set to 5 mm. The width of the installation gap is not too wide, which can ensure the appearance beauty of the grip portion of the skeleton. At the same time, this installation gap can effectively prevent the second-color foaming body from leaking material, and can also avoid the paint of the second-color foaming body sticking to the first-color foaming body when the installation gap is too narrow, thereby preventing color bleeding between the first-color foaming body and the second-color foaming body. In one example, corresponding to the two second-color foaming bodies provided, four installation gaps are provided.

[0094] The decorative member is formed by an injection molding method. The decorative member is in a ring buckle shape, and the decorative member is buckled in the installation gap. Corresponding to the four installation gaps provided, four decorative members are provided. In one example, when the decorative member is buckled in the installation gap, the outer contact surface of the decorative member, the outer contact surface of the second-color foaming body, and the outer contact surface of the first-color foaming body are on the same end surface, so that the outer contact surface of the grip portion of the formed two-color foaming steering wheel is in a smooth state.

[0095] The manufacturing method of a two-color foamed steering wheel provided by this application forms a first-color foamed body by performing a first foaming process in a first-color mold to wrap the grip part of the skeleton, and then in a second-color mold, a second-color foamed body is wrapped around a preset fixing structure of the first-color foamed body through a second foaming process to form a two-color foamed steering wheel. The first-color foamed body and the second-color foamed body achieve personalized appearance styling through the secondary foaming process, and combined with the in-mold painting process to meet the personalized color requirements. Moreover, the secondary foaming process improves the processing efficiency of the steering wheel and can also reduce the manufacturing cost. In addition, the second-color foamed body is connected to the first-color foamed body through a limiting structure to form a two-color foamed steering wheel, making the manufacturing of the two-color foamed steering wheel more stable, thereby improving the manufacturing quality of the two-color foamed steering wheel.

[0096] The third embodiment

[0097] This application also provides a manufacturing method of a two-color foamed steering wheel, as Figure 9 shown, Figure 9 is a flowchart of the manufacturing method of a two-color foamed steering wheel provided by the third embodiment of this application. The method includes the following steps:

[0098] Step S201, select a first-color mold and perform in-mold paint spraying treatment on the first-color mold.

[0099] In this step, the first-color mold is used to manufacture a two-color foamed steering wheel. After selecting the first-color mold, a first in-mold paint spraying treatment is performed on the first-color mold. Among them, performing the first in-mold paint spraying treatment on the first-color mold includes: spraying a release agent on the base surface of the first-color mold, and the release agent is used to separate the formed first-color foamed body (hereinafter) from the first-color mold. After spraying the release agent, a first-color environmentally friendly in-mold paint is sprayed on the base surface of the first-color mold. Among them, the base surface of the first-color mold includes the base surfaces of the upper mold and the lower mold of the first-color mold. The first-color environmentally friendly in-mold paint includes a first-color water-based environmentally friendly in-mold paint. The color of the first-color environmentally friendly in-mold paint is the same as the color of the first-color polyurethane (hereinafter).

[0100] Step S202, place the skeleton of the steering wheel into the first-color mold for positioning, and after preheating the first-color mold, inject first-color polyurethane into the grip part of the skeleton, and demold after heat preservation and curing to form a first-color steering wheel on the grip part of the skeleton; a limiting structure is formed on the preset fixing structure of the first-color steering wheel.

[0101] After spraying the release agent and the first-color environmentally friendly in-mold paint, the skeleton of the steering wheel is placed into the first-color mold for foaming. Specifically, the skeleton of the steering wheel is placed into the first-color mold for positioning. After pre-heating the first-color mold, the first-color polyurethane is injected into the grip portion of the skeleton. After heat preservation and curing, demolding is performed to form the first-color steering wheel on the grip portion of the skeleton; the preset fixing structure of the first-color steering wheel forms a limiting structure.

[0102] Further, in this embodiment, a first positioning structure is correspondingly provided on the skeleton of the steering wheel and the first-color mold. Specifically, the first positioning structure includes a first positioning pin and a first positioning hole. Among them, the first positioning pin is provided on the first-color mold, the first positioning hole is provided on the skeleton of the steering wheel, and the first positioning pin and the first positioning hole are oppositely arranged. The first positioning pin is inserted into the first positioning hole to position the skeleton of the steering wheel in the first-color mold. After positioning the skeleton of the steering wheel in the first-color mold, the first-color mold is pre-heated. In one example, the heating temperature for pre-heating the first-color mold is 60-70 °C. After pre-heating the first-color mold, the first-color polyurethane is injected into the grip portion of the skeleton. After heat preservation and curing, demolding is performed to form the first-color steering wheel on the grip portion of the skeleton. In one example, the first-color polyurethane injected into the grip portion of the skeleton includes two-component polyurethane of A material and B material, and the ratio of the A material to the B material is 7:4. In one example, the heat preservation and curing time of the first-color mold is 90 seconds.

[0103] In one example, after the first-color polyurethane is heat-preserved and cured and demolded to form the first-color steering wheel on the grip portion of the skeleton, it is necessary to trim the formed first-color steering wheel.

[0104] In this embodiment, the first-color steering wheel has a preset fixing structure. Among them, the radial dimension of the preset fixing structure of the first-color steering wheel is smaller than the radial dimension of the first-color steering wheel, so that the preset fixing structure of the first-color steering wheel is recessed on the first-color steering wheel. In one example, the preset fixing structure of the first-color steering wheel is set to two. Among them, the preset fixing structure of the first-color steering wheel is the position where the steering wheel is held by hand, and is distributed on the first-color steering wheel at intervals according to the two hands holding the first-color steering wheel. In other examples, the preset fixing structure of the first-color steering wheel is set to one or more than two. For example, when the preset fixing structure of the first-color steering wheel is set to three, the preset fixing structures of the first-color steering wheel are equally spaced on the first-color steering wheel at an angle of 120 degrees with the center point of the skeleton.

[0105] Step S203, shield the part outside the preset fixing structure of the first-color steering wheel, and spray the second-color paint on the preset fixing structure to form a two-color foaming steering wheel.

[0106] In this embodiment, different from the secondary foaming process, a complete foamed steering wheel is generated using the primary foaming process, and the first color is applied to the foam by in-mold painting. The steering wheel is taken out, and a customized tooling is used to cover the first-color foam, and the second-color foam is separately painted. A two-color foamed steering wheel can also be obtained in this way.

[0107] It should be noted that although several structures, components, or units for implementing related functions are mentioned in the above detailed description, this division is not mandatory. In fact, according to the specific implementation manners of the present application, the features and functions of two or more of the above-described structures, components, or units can be embodied in one structure, component, or unit. Conversely, the features and functions of one structure, component, or unit described above can be further divided and embodied by multiple components, structures, or units.

[0108] In addition, although the components of the components or devices in the present application and the installation manners between the components are described in a specific order in the drawings, this does not require or imply that the components or devices must be designed in accordance with the specific components or installation manners between the components, or that all the shown components must be included to achieve the desired results. Additionally or alternatively, some components can be omitted, multiple components can be combined into one component to achieve the corresponding function, and / or one component can be decomposed into multiple components to achieve the corresponding function, etc.

[0109] Although the present application is disclosed above in preferred embodiments, it is not used to limit the present application. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application should be subject to the scope defined by the claims of the present application.

Claims

1. A two-color foamed steering wheel, characterized in that, Comprising: A skeleton, a first-color foaming body, a second-color foaming body, and a limiting structure provided on the first-color foaming body; The first-color foaming body wraps around the grip portion of the skeleton through a first foaming process; the first-color foaming body has a preset fixing structure, and the limiting structure is provided on the preset fixing structure; The second-color foaming body wraps around the preset fixing structure through a second foaming process, and the second-color foaming body is connected to the first-color foaming body through the limiting structure to form a two-color foaming steering wheel.

2. The two-color foamed steering wheel according to claim 1, wherein The number of preset fixing structures of the first-color foaming body is set to two, and the radial dimension of the preset fixing structure of the first-color foaming body is smaller than the radial dimension of the first-color foaming body, so that the preset fixing structure of the first-color foaming body is recessed on the first-color foaming body; correspondingly, The second-color foaming body is provided in two, and each second-color foaming body is correspondingly provided in the preset fixing structure of each first-color foaming body.

3. The two-color foamed steering wheel according to claim 2, wherein, Further comprising: An installation gap. In the axial direction, both ends of the first-color foaming body relative to the second-color foaming body form the installation gap in the preset fixing structure; the number of installation gaps is set to four; A decorative member. The decorative member is in a ring buckle shape, and the decorative member is buckled in the installation gap.

4. The two-color foamed steering wheel according to claim 3, characterized in that The limiting structure includes: a first limiting groove and a second limiting groove; The first limiting groove is recessed in the installation gap, and the first limiting groove is oppositely arranged on both sides of the preset fixing structure; the first limiting groove can accommodate both opposite ends of the second-color foaming body to limit the degrees of freedom of the second-color foaming body in the axial direction and the radial direction; The second limiting groove is vertically recessed in the preset fixing structure; the second limiting groove can accommodate a part of the grip portion of the second-color foaming body to limit the degree of freedom of the second-color foaming body in the axial direction.

5. A preparation method for manufacturing a two-color foamed steering wheel, which can manufacture the two-color foamed steering wheel according to any one of the above-mentioned claims 1-4, characterized in that, Comprising: Select a first-color mold and perform a first in-mold paint spraying treatment on the first-color mold; Place the skeleton of the steering wheel into the first-color mold for positioning, and after pre-heating the first-color mold, inject first-color polyurethane into the grip portion of the skeleton, and demold after heat preservation and curing to form a first-color foaming body on the grip portion of the skeleton; the preset fixing structure of the first-color foaming body forms a limiting structure; Select a second-color mold and perform a second in-mold paint spraying treatment on the second-color mold; Place the skeleton and the first-color foaming body into the second-color mold and position and fix them, and after pre-heating the second-color mold, inject second-color polyurethane into the preset fixing structure of the first-color foaming body, and demold after heat preservation and curing to form a second-color foaming body on the preset fixing structure of the first-color foaming body, and the second-color foaming body is connected to the first-color foaming body through the limiting structure to form a two-color foaming steering wheel.

6. The preparation method of manufacturing a two-color foamed steering wheel according to claim 5, characterized in that, The performing the first in-mold paint spraying treatment on the first-color mold includes: Spray a release agent on the base surface of the first-color mold, and then spray a first-color environmentally friendly in-mold paint on the base surface of the first-color mold; Correspondingly, the performing the first in-mold paint spraying treatment on the second-color mold includes: Spray a mold release agent on the base surface of the second-color mold, and then spray a second-color environmentally friendly in-mold paint on the base surface of the second-color mold.

7. The preparation method of manufacturing a two-color foamed steering wheel according to claim 5, characterized in that, The preheating temperature of the first-color mold and the second-color mold is 60-70 °C.

8. The manufacturing method of a two-color foamed steering wheel according to claim 5, characterized in that, The first-color polyurethane and the second-color polyurethane each include a two-component polyurethane of component A and component B, and the ratio of component A to component B is 7:

4.

9. A preparation method for manufacturing a two-color foamed steering wheel, which can manufacture the two-color foamed steering wheel described in any one of claims 1-4 above, characterized in that, It includes: Select a first-color mold and perform in-mold paint spraying treatment on the first-color mold; Place the skeleton of the steering wheel into the first-color mold for positioning. After preheating the first-color mold, inject the first-color polyurethane into the grip part of the skeleton. After heat preservation and curing, demold to form a first-color steering wheel on the grip part of the skeleton; the preset fixing structure of the first-color steering wheel forms a limiting structure; Cover the part outside the preset fixing structure of the first-color steering wheel, and spray a second-color paint on the preset fixing structure to form a two-color foaming steering wheel.

10. The preparation method for manufacturing a two-color foamed steering wheel according to claim 9, characterized in that, The first in-mold paint spraying treatment on the first-color mold includes: Spray a mold release agent on the base surface of the first-color mold, and then spray a first-color environmentally friendly in-mold paint on the base surface of the first-color mold.

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