Vehicle moldings

Abstract

In a vehicle molding in which a resin part and a metal material with a part exposed are bonded by an adhesive layer, the adhesive strength between the metal material and the adhesive layer is improved. [Solution] A vehicle molding comprising a long core material 2, a resin part 3 made of resin that holds at least a portion of the core material 2 in an exposed state, and an adhesive layer 4 interposed between the core material 2 and the resin part 3, wherein the core material 2 has a surface layer part that has multiple recesses communicating with its surface and is formed in at least the area where the adhesive layer comes into contact, and a support layer part to which the surface layer part is fixed and that supports the surface layer part.

Description

[Technical Field]

[0001] The present invention relates to a molding for a vehicle. [Background technology]

[0002] Conventionally, vehicles have been equipped with moldings such as outside moldings. These outside moldings are attached to the upper edge of door panels to prevent water and other contaminants from entering the gap between the door panel and the window pane, for example.

[0003] Patent Document 1 discloses an outside molding like the one described above that has at least a portion of the metal material exposed to improve design. Because this type of outside molding has a portion of the metal material exposed to the outside of the vehicle, the metallic luster can be seen from outside the vehicle, improving the texture of the vehicle. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 7-5847 Summary of the Invention [Problem to be solved by the invention]

[0005] In moldings such as outside moldings, a metal material with a portion exposed is fixed to a resin portion made of resin for holding the metal material via an adhesive layer. This adhesive layer is formed, for example, from a thermosetting resin. The adhesive is applied to the metal material, baked and dried by high-frequency heating, and then heated and compressed with molten resin during extrusion molding. This adhesive layer bonds the metal material to the resin portion. However, if the adhesive strength between the metal material and the adhesive layer is insufficient due to factors such as insufficient heating, a portion of the metal material may peel off from the resin portion during long-term use, which could adversely affect the design of the molding.

[0006] The present invention has been made in consideration of the above-mentioned problems, and aims to improve the adhesive strength between a resin part and an adhesive layer in a vehicle molding in which a resin part and a metal material with a portion exposed are bonded together by an adhesive layer. [Means for solving the problem]

[0007] The present invention employs the following configuration as a means for solving the above problems.

[0008] The first invention is a vehicle molding comprising a long metal material, a resin part made of resin that holds at least a portion of the metal material in an exposed state, and an adhesive layer interposed between the metal material and the resin part, wherein the metal material has a surface layer part that has a plurality of recesses that communicate with the surface and is formed in at least the area where the adhesive layer contacts, and a support layer part to which the surface layer part is fixed and that supports the surface layer part.

[0009] A second invention is the first invention, wherein the surface layer is formed from a material obtained by oxidizing the material forming the support layer.

[0010] A third invention is the second invention, wherein the surface layer is an anodic oxide coating.

[0011] A fourth invention employs a configuration in which, in any one of the first to third inventions, the surface layer portion is also provided in an exposed region of the metal material.

[0012] The fifth invention, in any one of the first to fourth inventions, adopts a configuration in which the surface of the adhesive layer on the metal material side is an uneven surface that follows the recesses of the surface layer portion, and the surface on the resin portion side is a smooth surface. [Effects of the Invention]

[0013] According to the present invention, a surface layer portion having a plurality of recesses communicating with the surface is formed in an area of ​​contact with the adhesive layer of a metal material held in a resin portion with at least a portion exposed. The recesses in the surface layer portion increase the surface area of ​​the metal material compared to a case in which the surface layer portion is absent. Therefore, according to the present invention, the contact area with the adhesive layer is increased, and the adhesive strength of the adhesive layer to the metal material can be strengthened. Therefore, according to the present invention, in a vehicle molding in which a resin portion and a partially exposed metal material are bonded by an adhesive layer, the adhesive strength between the metal material and the adhesive layer can be improved. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a front view of a front door of a vehicle on which an outside molding according to an embodiment of the present invention is installed. [Figure 2] FIG. 2 is an enlarged perspective view including one end of an outside molding according to an embodiment of the present invention. [Figure 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 4] FIG. 2 is a schematic enlarged partial cross-sectional view of an outside molding in one embodiment of the present invention, at a location including an adhesive layer. DETAILED DESCRIPTION OF THE INVENTION

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vehicle molding according to the present invention will now be described with reference to the drawings.

[0016] FIG. 1 is a front view of a vehicle front door 10 on which an outside molding 1 (vehicle molding) of this embodiment is installed. As shown in this figure, the vehicle front door 10 includes a door panel 11, a window frame 12, a window pane 13, and the outside molding 1. The door panel 11 is a reinforcing member made of steel plate, and includes, for example, a door outer panel which is an exterior panel, and a door inner panel which is disposed inside the door outer panel. The window frame 12 is a frame body provided at the top of the door panel 11. The window pane 13 is disposed in an area surrounded by the window frame 12, and is raised and lowered by a lifting mechanism (not shown).

[0017] The outside molding 1 of this embodiment is a long component that extends in the front-to-rear direction of the vehicle (left-to-right direction in FIG. 1) and is fixed to the upper end of the door panel 11, and is positioned so as to fill the gap between the door panel 11 and the window pane 13. FIG. 2 is an enlarged perspective view including one end of the outside molding 1 of this embodiment. As shown in this figure, the outside molding 1 of this embodiment has a lid portion formed by drawing a core material 2 (described later) at the end, which eliminates the need for a so-called end cap. However, it is also possible to adopt a configuration in which the end of the core material 2 is left open and an end cap is attached to this open end without drawing the core material 2.

[0018] Fig. 3 is a cross-sectional view taken along line AA in Fig. 2. As shown in Fig. 3, the door panel 11 to which the outside molding 1 of this embodiment is attached has an upper end folded back from the outside toward the inside of the vehicle. This folded portion of the door panel 11 is hereinafter referred to as the folded portion 11a. The door panel 11 has a shape in which the above-mentioned folded portion 11a is provided from one end to the other end in the front-to-rear direction of the vehicle.

[0019] As shown in Fig. 3, the outside molding 1 of this embodiment includes a core material 2 (metal material), a resin portion 3, an adhesive layer 4, and a low-friction layer 5. The core material 2 is a strength member that ensures the rigidity of the outside molding 1 of this embodiment, and is a part made of stainless steel formed by roll forming. The core material 2 is disposed along the extension direction of the outside molding 1, and is held in the resin portion 3 with a portion exposed. As shown in Fig. 3, the core material 2 has an embedded region 2a embedded in the resin portion 3, an exposed region 2b with one side exposed to the outside, and a tip region 2c connected to the lower end of the exposed region 2b.

[0020] The buried region 2a and the tip region 2c are disposed opposite each other across the folded portion 11a of the door panel 11, with the buried region 2a disposed on the inside of the vehicle and the tip region 2c disposed on the outside. The exposed region 2b is curved to connect the buried region 2a and the tip region 2c. The exposed region 2b is a region whose outer surface is exposed toward the outside of the vehicle when the outside molding 1 of this embodiment is attached to the vehicle. Note that the surfaces of the buried region 2a and the tip region 2c cannot be seen from the outside when the outside molding 1 of this embodiment is attached to the vehicle.

[0021] FIG. 4 is a schematic, partially enlarged cross-sectional view of the outside molding 1 at a location including the adhesive layer 4. As shown in this figure, the core material 2 has a surface layer 2d and a support layer 2e. The surface layer 2d is a layer that forms the surface side of the core material 2 and is formed to cover the entire front and back surfaces of the support layer 2e. This surface layer 2d is made of an oxide coating obtained by anodizing the material from which the support layer 2e is formed (e.g., stainless steel), and has a plurality of recesses 2d1 that communicate with the surface, as shown in FIG. 4. The surface layer 2d is formed over the entire front and back surfaces of the core material 2, including the area in contact with the adhesive layer 4.

[0022] The surface layer 2d is chemically bonded to the support layer 2e and increases the surface area of ​​the core material 2. In other words, recesses 2d1 (pores) are formed in the surface of the surface layer 2d, increasing the surface area of ​​the core material 2 compared to when the core material 2 is made of only the support layer 2e without the surface layer 2d. As a result, the contact area between the core material 2 and the adhesive layer 4 increases, improving the adhesive strength between the core material 2 and the adhesive layer 4.

[0023] In this embodiment, the surface layer 2d is also provided on the surface side (the surface facing the outside of the vehicle) of the exposed region 2b of the core material 2, and determines the color of the exposed region 2b of the core material 2 that is visible to outsiders by the effect of light interference. The thickness of such surface layer 2d is set so that the color of the exposed region 2b of the core material 2 is recognized as a desired color. For example, the thickness of the surface layer 2d is set so that the exposed region 2b of the core material 2 has a black metallic luster.

[0024] Thus, in this embodiment, the surface layer 2d has two functions: to increase the adhesive strength between the core material 2 and the adhesive layer 4, and to determine the color of the core material 2. Therefore, the outside molding 1 of this embodiment has a simple structure, as it does not require the provision of separate functional layers for coloring the core material 2 and improving the adhesive strength of the core material 2. In other words, in the outside molding 1 of this embodiment, the surface layer 2d made of an oxide coating is much thicker than the oxide coating of general stainless steel, to the extent that the exposed region 2b is visually recognized as having a colored (e.g., black) metallic luster. This results in deep recesses 2d1, into which the adhesive layer 4 penetrates, creating an anchoring effect that improves the adhesive strength between the core material 2 and the adhesive layer 4.

[0025] The support layer 2e is a portion to which the surface layer 2d is fixed and which supports the surface layer 2d, and the surface layer 2d is formed over the entire front and back surfaces. The support layer 2e is made of the material (e.g., stainless steel) of the surface layer 2d before it is oxidized.

[0026] The resin part 3 is a resin member formed of, for example, polyvinyl chloride, and holds the core material 2 and is supported by the core material 2. The resin part 3 has a base 3a in which the embedded area 2a of the core material 2 is disposed, a tilt prevention part 3b that prevents the core material 2 from tilting, two lips 3c that protrude toward the inside of the vehicle, a decorative lip 3d that protrudes upward, and a buffer lip 3e.

[0027] The base 3a is provided to cover the embedded region 2a of the core material 2 from both the front and rear sides. The base 3a has an inner panel abutment 3a1 that protrudes toward the door panel 11. The inner panel abutment 3a1 is disposed opposite the tilt prevention portion 3b and, together with the tilt prevention portion 3b, holds the door panel 11. When the door panel 11 is inserted into the gap between the inner panel abutment 3a1 and the tilt prevention portion 3b, an inner lip 3b1 (described later) of the tilt prevention portion 3b elastically deforms, and the restoring force of the inner lip 3b1 holds the door panel 11 in place. In other words, the outside molding 1 is fixed to the door panel 11 by holding the door panel 11 between the inner panel abutment 3a1 and the tilt prevention portion 3b.

[0028] The base 3a also includes a retaining portion 3a2. The retaining portion 3a2 is provided at the bottom of the base 3a so as to protrude toward the exterior of the vehicle, and abuts from below against the end 11b of the door panel 11, which faces downward to form the folded portion 11a. This prevents the outside molding 1 from slipping upward relative to the door panel 11.

[0029] The tilt prevention portion 3b is disposed opposite the base portion 3a so as to sandwich the door panel 11. The tilt prevention portion 3b is adhered to the inner wall surface of the exposed region 2b of the core material 2 via an adhesive layer 4, and prevents the core material 2 from tilting by supporting the core material 2 from the inside.

[0030] The tilt prevention portion 3b has an inner lip 3b1 that protrudes toward the door panel 11. The inner lip 3b1 is a lip that is elastically deformed when pressed by the door panel 11 inserted between the base 3a and the tilt prevention portion 3b, and holds the door panel 11 between the base 3a and the tilt prevention portion 3b by its restoring force.

[0031] The lip 3c abuts against the window pane 13 via the low-friction layer 5, preventing rainwater and the like from getting in between the window pane 13 and the outside molding 1 of this embodiment. The lip 3c is also flexible enough not to hinder the window pane 13 from moving up and down.

[0032] The decorative lip 3d is provided at the upper end of the base 3a and protrudes from the base 3a in the direction of the window pane 13. The buffer lip 3e is provided at the tip region of the core material 2 and is a portion that abuts against the door panel 11 and elastically deforms. This buffer lip 3e prevents rainwater and the like from entering between the door panel 11 and the outside molding 1 of this embodiment and absorbs variations during installation. In addition, the buffer lip 3e is adhered to the surface of the core material 2 via an adhesive layer 4.

[0033] The adhesive layer 4 is interposed between the core material 2 and the resin portion 3, bonding the core material 2 and the resin portion 3 together. More specifically, the adhesive layer 4 is interposed between the core material 2 and the base portion 3a of the resin portion 3, between the core material 2 and the tilt prevention portion 3b of the resin portion 3, and between the core material 2 and the buffer lip 3e of the resin portion 3. This adhesive layer 4 is formed, for example, by heating and hardening a thermosetting adhesive. As shown in FIG. 4, the adhesive layer 4 is embedded in multiple recesses 2d1 provided in the surface layer 2d of the core material 2, and the surface facing the core material 2 is an uneven surface conforming to the recesses 2d1 provided in the surface layer 2d. On the other hand, the surface of the adhesive layer 4 facing the resin portion 3 is in face-to-face contact with the surface of the resin portion 3 (i.e., the tilt prevention portion 3b) and is a smooth surface conforming to the surface of the resin portion 3 (i.e., the tilt prevention portion 3b).

[0034] The low-friction layer 5 is a layer implanted with nylon pile or the like, which has lower friction than the lip 3c, and is formed on the surface of the lip 3c and comes into direct contact with the window pane 13. This low-friction layer 5 allows the outside molding 1 of this embodiment to slidably come into contact with the window pane 13 while preventing the surface of the window pane 13 from being scratched, etc.

[0035] For example, when manufacturing the outside molding 1 of this embodiment, a strip of metal material made of stainless steel or the like is anodized to form a strip-shaped core material 2 having a surface layer 2d and a support layer 2e. When forming the core material 2, the required length of metal material may be cut out from the hoop material and the cut-out metal material may be anodized to form the core material 2, or the hoop material may be anodized to form the core material 2.

[0036] Next, the softened adhesive is applied to the strip-shaped core material 2, and then the adhesive is dried by heating using a high-frequency heater or the like. The strip-shaped core material 2 with the adhesive applied thereto is then gradually formed into the final shape shown in Figure 3 by roll forming. Note that the adhesive has dried and lost its adhesive strength. This prevents the adhesive from adhering to the roll forming machine during roll forming.

[0037] Next, the resin portion 3 is formed by extrusion molding on the surface of the core material 2 to which the adhesive has been applied. At this time, the adhesive is heated and pressed by the molten resin, causing it to harden onto the resin portion 3, forming an adhesive layer 4 that bonds the core material 2 and the resin portion 3. After that, the resin portion 3 and adhesive layer 4 are cooled and subjected to necessary post-processing, completing the outside molding 1 of this embodiment.

[0038] According to the outside molding 1 of this embodiment as described above, the surface layer 2d has a plurality of recesses 2d1 that communicate with the surface, formed in the area that contacts the adhesive layer 4 of the core material 2, at least a portion of which is exposed and held by the resin part 3. These recesses 2d1 in the surface layer 2d make it possible to increase the surface area of ​​the core material 2 compared to a case where the surface layer 2d is not present. Therefore, according to the outside molding 1 of this embodiment, the contact area with the adhesive layer 4 can be increased, and the adhesive strength of the adhesive layer 4 to the core material 2 can be strengthened.

[0039] In the outside molding 1 of this embodiment, the surface layer 2d is formed from a material obtained by oxidizing the material forming the support layer 2e. Therefore, by oxidizing the surface of the strip-shaped metal material made from the material forming the support layer 2e, the surface layer 2d having the multiple recesses 2d1 can be easily formed.

[0040] In the outside molding 1 of this embodiment, the surface layer 2d is an anodized coating, which makes it possible to form the core material 2 having the surface layer 2d and the support layer 2e from a strip-shaped metal material made of the material for forming the support layer 2e through a simple process.

[0041] Furthermore, in the outside molding 1 of this embodiment, a surface layer 2d is also provided in the exposed area of ​​the core material 2. Therefore, it is possible to arbitrarily change the color tone of the exposed area 2b by adjusting the film thickness of the surface layer 2d, without forming a separate layer that changes the color tone of the core material 2.

[0042] Furthermore, in the outside molding 1 of this embodiment, the surface of the adhesive layer 4 facing the core material 2 is an uneven surface that conforms to the recesses 2d1 of the surface layer 2d, and the surface facing the resin portion 3 is a smooth surface. For example, if the surface of the adhesive layer 4 facing the resin portion 3 is an uneven surface that conforms to the recesses 2d1 of the surface layer 2d, the surface of the resin portion 3 facing the adhesive layer 4 will inevitably be an uneven surface. In such a case, sink marks may occur when the resin portion 3 formed by injection molding is cooled, which could cause deformation of the resin portion 3. In contrast, if the surface of the adhesive layer 4 facing the resin portion 3 is a smooth surface, as in the outside molding 1 of this embodiment, the surface of the resin portion 3 facing the adhesive layer 4 will also be a smooth surface, preventing sink marks from occurring in the resin portion 3 when it is cooled.

[0043] While the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to the above-described embodiments. The shapes and combinations of the components shown in the above-described embodiments are merely examples, and various modifications can be made based on design requirements, etc., without departing from the spirit of the present invention.

[0044] For example, in the above embodiment, the core material 2 has a configuration including an embedded region 2a embedded in the resin portion 3 and an exposed region 2b exposed to the outside. However, the present invention is not limited to this. For example, the core material 2 may be divided into two regions: one embedded in the resin portion 3 and one exposed to the outside. In such a case, the region embedded in the resin portion 3 serves as a strength member of the outside molding 1, and the region exposed to the outside serves as a decorative member that imparts metallic luster to the outside molding 1. In this case, an adhesive layer 4 is interposed between the region exposed to the outside (metal material) and the resin portion 3, and at least the region exposed to the outside comprises the surface layer 2d. Note that if the rigidity of the outside molding 1 is sufficiently ensured by the region exposed to the outside and the resin portion 3, the region embedded in the resin portion 3 may be omitted.

[0045] In the above embodiment, the surface layer 2d is an oxide film formed by anodizing the base material (metal material made of the material that forms the support layer 2e). However, the present invention is not limited to this. For example, it is also possible to form recesses by physically processing the surface of the base material, and use the layer in which these recesses are formed as the surface layer. It is also possible to adopt a configuration in which a porous metal body made of a material different from the base material is fixed to the base material, and this porous metal body is used as the surface layer.

[0046] In the above embodiment, the adhesive layer 4 is interposed between the tilt prevention portion 3b of the resin portion 3 and the core material 2. However, the position where the adhesive layer 4 is interposed is not limited to this. For example, it is also possible to employ a configuration in which the adhesive layer 4 is interposed between the base portion 3a of the resin portion 3 and the core material 2.

[0047] In the above embodiment, the core material 2 is made of stainless steel. However, the present invention is not limited to this. For example, the core material 2 may be made of aluminum or an aluminum alloy. In this case, the surface layer 2d may be made of aluminum oxide, for example.

[0048] In the above embodiment, the vehicle molding of the present invention is described as being applied to an outside molding 1 having a lip 3c that can slide against a window pane 13 that moves up and down via a low-friction layer 5. However, the present invention is not limited to this. For example, the present invention can also be applied to a vehicle molding that abuts against a fixed window pane that does not move up and down.

[0049] In the above embodiment, the configuration has been described in which the surface of the adhesive layer 4 facing the resin part 3 is a smooth surface. However, the present invention is not limited to this, and does not exclude a configuration in which the surface of the adhesive layer 4 facing the resin part 3 is an uneven surface.

[0050] In the above embodiment, the surface layer 2d is formed over the entire area of ​​the core material 2. However, the present invention is not limited to this. For example, it is also possible to adopt a configuration in which the surface layer 2d is formed only in a portion of the core material 2, including the area that is bonded to the adhesive layer 4.

[0051] In the above embodiment, the resin portion 3 is made of vinyl chloride. However, the present invention is not limited to this. For example, the resin portion 3 may be made of synthetic rubber, natural rubber, or the like. [Explanation of symbols]

[0052] 1...Outside molding (vehicle molding), 2...Core material (metal material), 2a...Buried area, 2b...Exposed area, 2c...Tip area, 2d...Surface layer, 2d1...Recess, 2e...Support layer, 3...Resin part, 3a...Base, 3b...Anti-tilt part, 3e...Buffer lip, 4...Adhesive layer, 5...Low-friction layer

Claims

1. A vehicle molding comprising: an elongated metal material formed of stainless steel; a resin part made of resin that holds at least a portion of the metal material in an exposed state; and an adhesive layer interposed between the metal material and the resin part, The metal material is a surface layer portion having a plurality of recesses communicating with the surface and formed at least in the region in contact with the adhesive layer and the exposed region; a support layer portion that is fixed to the surface layer portion by chemical bonding and supports the surface layer portion; and the surface layer portion has a thickness that allows it to be visually recognized as having a metallic luster with a color different from that of the support layer portion due to the light interference effect, and the recesses have an anchor effect that improves the adhesive strength with the adhesive layer; The exposed area of ​​the surface layer is visible due to the metallic luster, and the area in contact with the adhesive layer improves adhesive strength with the adhesive layer by the anchor effect. A vehicle molding characterized by:

2. 2. The vehicle molding according to claim 1, wherein the surface layer is an oxide film formed by oxidizing the material forming the support layer.

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