Vehicle decorative part, vehicle window glass assembly and preparation method thereof

Abstract

The present invention provides a vehicle decorative part, a vehicle window glass assembly having the vehicle decorative part, and a preparation method thereof. The vehicle decorative part is used to be attached to the edging by integral injection molding, and the vehicle decorative part includes a decorative part body and a lining film attached to the inner surface of the decorative part body, the lining film covers a part of the inner surface so that the covered inner surface does not contact the injection molding material during the injection molding process of the decorative part, and the thickness dimension of the edging corresponding to the position covered by the lining film on the inner surface of the decorative part body is greater than the thickness dimension of the edging corresponding to the position not covered by the lining film. The vehicle decorative part of the present invention provides a lining film on the inner surface of the decorative part body so that the covered inner surface does not adhere to the injection molding material, and when the injection molding process of the vehicle window edging is implemented, the deformation of the decorative part caused by the shrinkage of the injection molding material is avoided. The vehicle window glass assembly having the vehicle decorative part has a good appearance and ensures the geometric dimensions for assembly with vehicle parts.

Description

Technical Field

[0001] The present invention generally relates to the field of production of vehicle parts, and more specifically, to a vehicle decorative part, a vehicle window glass assembly having the vehicle decorative part, and a preparation method thereof. Background Art

[0002] With the rapid development of the automobile industry, the appearance of vehicles is constantly changing to meet the preferences of different consumers from all walks of life. In order to improve the appearance quality of the whole vehicle, more and more manufacturers are using decorative strips to attach exposed sheet metal on doors and window frames for decoration. Traditional decorative strips are generally bright strips made of plastic or metal, which are used to cover the sheet metal of the body pillars (A-pillars, B-pillars and C-pillars) and / or window frames to improve the glossiness of the outer surface, thereby increasing the overall luxury and sportiness of the vehicle.

[0003] Figure 1 The method of applying decorative bright strips to the rear quarter window of a vehicle is shown, wherein the rear quarter window assembly of the vehicle shown includes a glass body 20 and a rim 30 covering the outer periphery of the glass body 20, and the vehicle decorative part 10 is attached to the rim 30. For automobile manufacturers, the vehicle decorative part 10 is usually made of metal materials such as stainless steel or aluminum alloy, and is directly bonded to the vehicle body with double-sided tape, or formed into an integral structure with the glass body and the rim by an "rim / insert injection molding (overmolded)" process. Specifically, Figure 2 As shown, the decorative component 10 and the glass body 20 are placed in an injection mold including an upper mold 40 and a lower mold 50, and molten edging material, such as PVC (polyvinyl chloride) or TPE (thermoplastic elastomer), for forming the edging 30 is injected. When the edging material is cooled and solidified, the glass body 20 and the decorative component 10 will be combined and fixed together through the bonding properties of the edging material.

[0004] However, when the existing injection molding process is used to form the edge, due to the characteristics of the plastic material itself, the molten edge material will shrink due to cooling in the mold cavity, which makes the edge size not well matched with other parts. In particular, when the molding thickness of the edge material is greater than 5mm, shrinkage will be clearly observed on the surface of the injection molded product. In addition, a primer material is usually applied between the decorative part and the edge material to obtain good adhesion and fixation between the two. If the edge material is thicker in the decorative part area, the edge material will produce a large cooling shrinkage, which will cause the decorative part to deform in a local area to follow the shape of the edge, such as Figure 2 As shown by the dashed line, the decorative element 10 will deform in the direction of the arrow. Obviously, this deformation will cause optical distortion on the outer surface of the decorative element, such as concave, thereby affecting the appearance quality, and the surface geometric dimensions will not meet the production and assembly requirements.

[0005] In order to prevent the shrinkage phenomenon, some solutions increase the injection pressure during the injection molding process, but this will cause more injection molding materials to leak due to the high pressure, resulting in additional trimming work for the decorative parts, and may also cause glass cracks, resulting in a decrease in the yield rate. Some solutions also consider not applying the primer material to the local area where the edge material is thicker to reduce the adhesion between the decorative parts and the injection molding material, but this will also add additional processes due to the difficulty of operation and the need for additional special tools, resulting in a longer cycle and the need for more production space. Summary of the invention

[0006] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and to propose a vehicle decorative part which can effectively avoid deformation during the injection molding process of the edging, thereby obtaining the desired aesthetic appearance at a low cost, and can be well adapted to the preparation process of the vehicle window parts to improve the product qualification rate.

[0007] To this end, according to one aspect of the present invention, a vehicle decorative part is provided, which is used to be attached to an edge by integral injection molding, and the vehicle decorative part includes a decorative part body and a lining film attached to the inner surface of the decorative part body, the lining film covers a portion of the inner surface so that the covered inner surface does not contact the injection molding material during the injection molding process of the decorative part, and the thickness dimension of the edge corresponding to the position on the inner surface of the decorative part body covered by the lining film is greater than the thickness dimension of the edge corresponding to the position not covered by the lining film.

[0008] According to the above technical concept, the present invention may further include any one or more of the following optional forms.

[0009] In certain optional forms, there is no adhesion between the backing film and the injection molding material.

[0010] In some optional forms, the backing film is made of polyvinylidene fluoride or polytetrafluoroethylene.

[0011] In some optional forms, the lining film is a single film or a plurality of films spaced apart and distributed along the length direction of the decorative element body.

[0012] In some optional forms, the backing film is attached to the inner surface of the trim body by lamination, coating or bonding.

[0013] In some optional forms, the lining film is attached to the inner surface after the trim body is subjected to a primer coating process.

[0014] In some optional forms, the thickness of the liner film is 0.1-4 mm.

[0015] According to another aspect of the present invention, a vehicle window glass assembly is provided, comprising a glass body, an edge covering the outer periphery of the glass body, and the vehicle decorative component as described above.

[0016] According to another aspect of the present invention, a method for preparing the above-mentioned vehicle window glass assembly is provided, the method comprising the following steps:

[0017] a. Providing a vehicle trim as described above;

[0018] b. placing the vehicle decoration part into the mold cavity and making the outer surface of the decoration part body fit with the inner wall of the cavity;

[0019] c. placing the cut and shaped glass body into the cavity and fixing it in place;

[0020] d. Injecting a thermoplastic polymer into the mold cavity to form the edge binding, and making the edge binding of the vehicle decorative part integrally formed.

[0021] In some optional forms, before step a, the method further includes the following steps: performing a primer coating process on the inner surface of the decorative component body, and then attaching a lining film to a portion of the inner surface.

[0022] The vehicle decorative part of the present invention provides a lining film on the inner surface of the decorative part body so that the covered inner surface is not bonded to the injection molding material, and the thickness of the edge wrapping corresponding to the position covered by the lining film on the inner surface of the decorative part body is greater than the thickness of the edge wrapping corresponding to the position not covered by the lining film, so that when the injection molding process of the vehicle window edge wrapping is implemented, the deformation of the decorative part caused by the larger shrinkage of the edge wrapping material in the thicker area is avoided. Therefore, the vehicle window glass assembly with the vehicle decorative part has a good appearance, and ensures the geometric dimensions of assembly with vehicle parts, has high production efficiency and is easy to control, and is widely applicable to various occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features and advantages of the present invention will be better understood through the following detailed description of the optional embodiments in conjunction with the accompanying drawings, in which the same reference numerals identify the same or similar components, wherein:

[0024] Figure 1 It is a schematic diagram of the vehicle decorative parts applied to the window glass;

[0025] Figure 2 It is a schematic diagram of the existing vehicle window glass assembly using injection molding;

[0026] Figure 3 is a schematic diagram of injection molding of a vehicle window glass assembly according to an embodiment of the present invention;

[0027] Figure 4It is a schematic diagram of implementing multiple lining films on the inner surface of a vehicle decorative part. DETAILED DESCRIPTION

[0028] The implementation and use of the embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely exemplary of specific ways to implement and use the present invention, and are not intended to limit the scope of the present invention. When describing the structural positions of the various components, such as up, down, top, bottom, etc., the expressions of directions are not absolute, but relative. When the various components are arranged as shown in the figure, these directional expressions are appropriate, but when the positions of the various components in the figure change, these directional expressions also change accordingly.

[0029] In this document, “outer” and “inner” are directions relative to the vehicle body, “outer” refers to the direction away from the vehicle body, and “inner” refers to the direction facing the vehicle body.

[0030] In this article, "glass" refers to a transparent semi-solid, semi-liquid substance that forms a continuous network structure when melted, and its viscosity gradually increases and hardens during cooling without crystallizing. It is a silicate non-metallic material.

[0031] In this article, "polymer" includes thermosetting polymers and thermoplastic polymers. Thermosetting polymers are formed by curing reaction of prepolymers in the presence of curing agents. Thermoplastic polymers are polymers that can be repeatedly heated and melted, molded in a softened or fluid state, and can maintain the shape of the mold after cooling. Curing agents are usually not required during the molding process.

[0032] According to the concept of the present invention, it is considered to solve the deformation defect commonly existing in the existing vehicle decorative bright strips when applied to the automobile edging, increase the beauty of the vehicle body and improve the assembly size of the window glass assembly.

[0033] To this end, the present invention provides a vehicle decorative part, which includes a decorative part body, wherein the outer surface of the decorative part body constitutes a decorative surface, and the inner surface is attached to the edging of the vehicle window glass assembly during the injection molding process. It should be understood that the decorative part body can be made of a metal material or a polymer, such as polyvinyl fluoride or polypropylene. In some embodiments, the decorative part body can be made of stainless steel or aluminum alloy to obtain lower cost-effectiveness and higher rigidity. It should be understood that the edging can also be called "sealing material", which refers to the material injected into the mold in a molten state during the injection molding process of the vehicle window glass assembly, usually a thermoplastic polymer, which plays a sealing role, and can reduce wind noise and ensure a good appearance. Thermoplastic polymers may be, for example, rubber, composite materials or other materials that can be used for sealing, including but not limited to polyurethane (PU), thermoplastic elastomer (TPE), ethylene propylene diene monomer (EPDM), thermoplastic vulcanizate (TPV), fluororubber, silicone rubber, styrene-butadiene rubber, nitrile rubber, polyvinyl chloride (PVC), polypropylene (PP), polyurethane rubber, acrylic rubber, styrene-based thermoplastic elastomer (SEBS+PP), polysulfide rubber, polymethyl methacrylate (PMMA). In addition, although the rear corner window is illustrated and described as an example, the vehicle windows include but are not limited to the front windshield, rear windshield, front door glass window, rear door glass window, sunroof, etc.

[0034] Combination Figure 3 As shown, the present invention advantageously provides a lining film 60 on the inner surface of the decorative part body of the vehicle decorative part 10 to cover a portion of the inner surface so that the covered inner surface does not contact the injection molding material during the injection molding process of the decorative part, and the present invention only provides the lining film for specific edging portions (such as thicker edging portions) that are prone to shrinkage. Specifically, the thickness of the edging corresponding to the position covered by the lining film on the inner surface of the decorative part body is greater than the thickness of the edging corresponding to the position not covered by the lining film.

[0035] As mentioned above, the lining film does not adhere to the injection molding material, which can be achieved by selecting a material suitable for the lining film. At the same time, the lining film is firmly connected to the inner surface of the decorative part body by, for example, adhesive. In this way, the lining film can always remain adhered to a specific position on the inner surface of the decorative part body during the injection molding process, and will not shift or misalign due to factors such as injection pressure. In addition, when the injection-molded vehicle window glass assembly cools and the injection molding material shrinks, see Figure 3 As shown, since the attachment surface 61 of the lining film 60 is adhered to the decorative part 10, and there is no adhesion between the surface 62 of the lining film 60 and the injection molding material forming the edge 30, the shrinkage of the injection molding material (such as Figure 3The inner dotted line in the middle of the decorative part (shown in the middle dotted line) allows the decorative part body covered by the lining film to be separated from the injection molding material without causing deformation of the decorative part body. Therefore, even if the cooling shrinkage of the injection molding material is inevitable, the original shape of the decorative part can be effectively maintained, thereby ensuring the finished appearance of the vehicle window glass assembly.

[0036] According to the present invention, the lining film 60 can be made of a polymer, especially a high temperature resistant polymer, and the polymer does not adhere to the injection molding material, thereby avoiding problems such as easy melting or wear during the injection molding process of the vehicle window edging. For example, in some embodiments, the lining film 60 may be polyvinylidene fluoride (PVDF) or polytetrafluoroethylene (PTFE), but other polymers with similar properties are also feasible. According to actual application needs, the covering position of the lining film is not unique. In some embodiments, the lining film may be a single film that covers the desired position on the longitudinal length of the decorative part body as a whole. In some embodiments, the lining film may be a plurality of films spaced apart along the length direction of the decorative part body. In other words, the lining film may be attached as a whole at a specific position, or it may be attached in sections. As Figure 4 As shown, along the length direction of the decorative part body, according to the hemming size design, the first lining film 60a, the second lining film 60b and the third lining film 60c are respectively applied at the position with the larger hemming thickness size. In addition, it should be understood that although the lining film shown in the figure is rectangular, the lining film can also be set to any shape and can have different sizes according to actual needs.

[0037] The backing film can be attached to the decorative part body by lamination, coating or bonding. Among them, the lamination method can use conventional film lamination equipment to attach the backing film to the decorative part body; the coating method includes but is not limited to drip coating, dipping, brushing, spraying, vapor deposition, electroplating, etc.; the bonding method can use adhesives, such as pressure-sensitive adhesives, to achieve reliable bonding between the backing film and the decorative part body. Since the backing film is in contact with the injection molding material injected at high temperature, when the adhesive method is used for connection, the adhesive needs to be heat-resistant, and it is preferred to use a thermosetting adhesive, such as an epoxy-based adhesive or a nylon-based adhesive.

[0038] Considering the appearance and assembly of the vehicle window glass assembly, and to ensure good positioning and fixation between the decorative part 10 and the injection molding material forming the edging, the inner surface of the decorative part body may be coated with a primer before injection molding. According to the present invention, the lining film 60 is attached to the inner surface of the decorative part body after the priming process is performed on the decorative part body, and the lining film 60 covers a portion of the inner surface of the decorative part body. In other words, the presence of the lining film does not affect the connection between the decorative part and the vehicle window edging.

[0039] In some embodiments, the thickness of the lining film may be 0.1-4 mm, and optionally, the thickness may be less than 3.2 mm. In this way, the presence of the lining film will not significantly increase the thickness of the decorative element body, and can be applied to most existing decorative element bodies.

[0040] The following is an overview of a method for preparing a vehicle window glass assembly according to the present invention, which may include the following steps:

[0041] Step a. providing the vehicle trim;

[0042] Step b. placing the vehicle decorative part into the mold cavity and making the outer surface of the decorative part body fit with the inner wall of the cavity;

[0043] Step c. placing the cut and formed glass body into the mold cavity and fixing it in place;

[0044] Step d. injecting a thermoplastic polymer into the mold cavity to form a rim, and forming the vehicle decorative part and the rim as one piece.

[0045] Furthermore, before step a, the following steps are also included: a primer coating process is performed on the inner surface of the decorative part body, and then a lining film is attached to part of the inner surface. In this way, the inner surface of the decorative part body can maintain a sufficient connection relationship with the injection molding material to ensure the size of the decorative part and the molded edge assembly, and the lining film can suppress the deformation of the decorative part caused by the shrinkage of the injection molding material.

[0046] Compared with the existing window glass assembly test, the vehicle decorative part of the present invention has no deformation defects in appearance, and the assembly size of the finished product is significantly improved, meeting the assembly requirements between vehicle parts. In addition, since the vehicle decorative part of the present invention adds a liner film after the primer is applied, and the liner film can effectively avoid the problem of shrinkage and deformation, there is no need to change the existing primer process. Similarly, when implementing the injection molding process, there is no need to increase the injection pressure, thereby simplifying the process steps and improving production efficiency.

[0047] It should be understood that the embodiments shown in the figure only show the optional shapes, sizes and arrangements of the various optional components of the vehicle decorative parts and window glass assemblies according to the present invention, but they are only for illustration and not for limitation. Other shapes, sizes and arrangements may also be adopted without departing from the concept and scope of the present invention. In the various embodiments mentioned above, the glass body may be selected as ordinary glass, tempered glass, laminated glass, hollow glass, semi-tempered laminated glass, ultra-thin glass, flat glass or curved glass, etc. It is understandable that the shape, size, etc. of the glass body may also be changed accordingly according to different application occasions and different appearance requirements.

[0048] The technical content and technical features of the present invention have been disclosed above. However, it can be understood that under the creative ideas of the present invention, those skilled in the art can make various changes and improvements to the above disclosed concepts, but they all belong to the protection scope of the present invention. The description of the above embodiments is illustrative rather than restrictive, and the protection scope of the present invention is determined by the claims.

Claims

1. A vehicle decoration part, characterized in that: The vehicle decorative part is used to be attached to the edging by integral injection molding, and the vehicle decorative part includes a decorative part body and a lining film attached to the inner surface of the decorative part body, the lining film covers a portion of the inner surface so that the covered inner surface does not contact the injection molding material during the injection molding process of the decorative part, and the thickness dimension of the edging corresponding to the position covered by the lining film on the inner surface of the decorative part body is greater than the thickness dimension of the edging corresponding to the position not covered by the lining film, and there is no adhesion between the lining film and the injection molding material, wherein the lining film is attached to the inner surface after the decorative part body is subjected to a primer coating process.

2. The vehicle decoration according to claim 1, characterized in that: The lining film is made of polyvinylidene fluoride or polytetrafluoroethylene.

3. The vehicle decoration according to any one of claims 1 to 2, characterized in that: The lining film is a single film or a plurality of films spaced and distributed along the length direction of the decorative element body.

4. The vehicle decoration according to any one of claims 1 to 2, characterized in that: The lining film is attached to the inner surface of the trim body by lamination, coating or bonding.

5. The vehicle decoration according to any one of claims 1 to 2, characterized in that: The thickness of the lining film is 0.1-4 mm.

6. A vehicle window glass assembly, comprising vitreous body; An edging covering the outer periphery of the glass body; It is characterized in that The vehicle window glass assembly further includes a vehicle trim according to any one of claims 1 to 5.

7. A method for preparing the vehicle window glass assembly according to claim 6, characterized in that: The method comprises the following steps: a. Providing a vehicle decoration according to any one of claims 1 to 5; b. placing the vehicle decoration part into the mold cavity and making the outer surface of the decoration part body fit with the inner wall of the cavity; c. placing the cut and shaped glass body into the cavity and fixing it in place; d. Injecting a thermoplastic polymer into the mold cavity to form the edge binding, and forming the vehicle decorative component and the edge binding in one piece.

8. The method according to claim 7, characterized in that Before step a, the method further includes the following steps: performing a primer coating process on the inner surface of the decorative component body, and then attaching a lining film to a portion of the inner surface.

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