JP2021054207A - Manufacturing method of molding - Google Patents

Abstract

To enable the molding having a core material made of a metal material whose surface layer is oxidized and a resin portion fixed to at least a part of the surface of the core material, to be inhibited from unintended discoloration of the core material and deterioration of the resin part.SOLUTION: A manufacturing method of an outside molding 1 having a core material 2 made of a metal material whose surface layer is oxidized and a resin portion 3 fixed to at least a part of a surface of the core material 2. The manufacturing method comprises: a base material forming step of forming a base material 6 made of a flat metal; an oxidation treatment step of forming the core material 2 by oxidizing a surface layer of the base material 6 after the base material forming step; and a resin part installation step of providing the resin portion 3 on a surface of the core material 2.SELECTED DRAWING: Figure 4

Description

The present invention relates to a molding manufacturing method.

Conventionally, the vehicle is equipped with a molding such as an outside molding. This outside molding is attached to the upper edge of the door panel, and prevents water or the like from entering the gap between the door panel and the window plate, for example. Patent Document 1 discloses an outside molding as described above, in which at least a part of a core material made of metal is exposed in order to improve the design. In such an outside molding, since a part of the core material is exposed toward the outside of the vehicle, the metallic luster can be visually recognized from the outside of the vehicle, and the texture of the vehicle can be improved.

Jikkenhei 7-5847 Gazette

By the way, in moldings such as outside moldings, by oxidizing the surface layer of the core material, it is possible to develop an arbitrary color while maintaining the metallic luster of the core material. In such a case, the surface layer of the flat strip-shaped base material is oxidized, and then the base material is formed into a core material shape.

However, when the strip-shaped base material is formed into a core material shape, a part of the base material is locally curved. When a part of the base material is locally curved in this way, the surface layer of the base material is stretched, for example, and the structure of the oxide film formed on the surface layer of the base material is changed. As a result, the curved region of the surface of the core material may be unintentionally discolored.

In order to prevent such discoloration, for example, it is conceivable to oxidize the surface layer of the base material after the molding of the base material is completed. However, in the molding in which the resin part is fixed to the core material, the resin part is removed by the oxidation treatment. There is a risk of deterioration.

The present invention has been made in view of the above-mentioned problems, and is a molding having a core material made of a metal material whose surface layer has been oxidized and a resin portion fixed to at least a part of the surface of the core material. The purpose is to make it possible to suppress unintended discoloration of the core material and deterioration of the resin part.

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

The first invention is a molding manufacturing method for manufacturing a molding having a core material made of a metal material whose surface layer has been oxidized and a resin portion fixed to at least a part of the surface of the core material, and is a flat plate. A base material molding step of molding a metal base material in the shape of a metal, an oxidation treatment step of oxidizing the surface layer of the base material after the base material molding step to obtain a core material, and a surface of the core material. A configuration is adopted in which the resin portion installation step of providing the resin portion is provided.

In the second invention, in the first invention, the configuration in which the end portion of the base material is drawn in the base material molding step is adopted.

In the third invention, in the first or second invention, the configuration in which the oxidation treatment step is an anodization treatment using the base material as an anode is adopted.

In the fourth aspect of the invention, in the first or second invention, the oxidation treatment step comprises a chemiluminescent step of chemically developing the base material in a solution and a dural treatment step of curing the surface of the base material. Adopt the configuration of having.

In the fifth aspect of the invention, in any one of the first to fourth inventions, the surface of the core material is adjusted to at least the region where the resin portion is provided before the resin portion is provided in the resin portion installation step. Adopt a configuration in which the adhesive is placed in.

The sixth invention adopts the configuration that the adhesive is an acrylic resin material in the fifth invention.

According to the present invention, after the flat base material is formed into the shape of a core material, the surface layer of the base material is oxidized. Therefore, it is possible to prevent the oxide film from changing its structure due to the curvature of the base material, and it is possible to suppress the occurrence of unintended discoloration of the core material. Further, according to the present invention, after the surface layer of the base material is oxidized, a resin portion is provided on the surface of the core material. Therefore, the resin portion is not exposed to the oxidation treatment environment, and deterioration of the resin portion can be suppressed. Therefore, according to the present invention, an unintended discoloration of the core material is caused by a molding having a core material made of a metal material whose surface layer has been oxidized and a resin portion fixed to at least a part of the surface of the core material. Deterioration of the resin portion can be suppressed.

It is a front view of the bronto door of the vehicle which installs the outside molding manufactured by the manufacturing method of the outside molding in one Embodiment of this invention. It is an enlarged perspective view which includes one end part of the outside molding manufactured by the manufacturing method of the outside molding in one Embodiment of this invention. FIG. 2 is a cross-sectional view taken along the line AA of FIG. It is a schematic explanatory drawing for demonstrating the manufacturing method of the outside molding in one Embodiment of this invention.

Hereinafter, an embodiment of the molding according to the present invention will be described with reference to the drawings.

FIG. 1 is a front view of the front door 10 of a vehicle in which the outside molding 1 (molding) of the present embodiment is installed. As shown in this figure, the front door 10 of the vehicle includes a door panel 11, a window frame 12, a window plate 13, and an outside molding 1. The door panel 11 is a strength member made of a steel plate, and has, for example, a door outer panel which is an exterior panel and a door inner panel arranged inside the door outer panel. The window frame 12 is a frame body provided on the upper part of the door panel 11. The window plate 13 is arranged in the area surrounded by the window frame 12, and is raised and lowered by an elevating mechanism (not shown).

The outside molding 1 of the present embodiment is a long-shaped component that extends and is fixed to the upper end of the door panel 11 in the front-rear direction (horizontal direction in FIG. 1) of the vehicle, and is formed by the door panel 11 and the window plate 13. It is arranged to fill the gap. FIG. 2 is an enlarged perspective view including one end of the outside molding 1 of the present embodiment. As shown in this figure, the outside molding 1 of the present embodiment has a lid portion formed by drawing a core material 2 (base material 6) described later at an end portion thereof. It has a structure that does not require a so-called end cap. However, it is also possible to adopt a configuration in which the end portion of the core material 2 is an open end and an end cap is attached to the open end without drawing the core material 2.

FIG. 3 is a cross-sectional view taken along the line AA of FIG. As shown in FIG. 3, the upper end of the door panel 11 to which the outside molding 1 of the present embodiment is attached is folded back from the outside to the inside of the vehicle. The folded portion of the door panel 11 in this way is hereinafter referred to as a folded portion 11a. The door panel 11 has a shape in which the folded-back portion 11a is provided from one end to the other end in the front-rear direction of the vehicle.

As shown in FIG. 3, the outside molding 1 of the present 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 for ensuring the rigidity of the outside molding 1 of the present embodiment. Further, the core material 2 is visible from the outside and has a metallic luster, and is also a decorative member forming the design of the outside molding 1 of the present embodiment. In the present embodiment, the core material 2 has a black metallic luster. Such a core material 2 is a component made of stainless steel or aluminum formed by subjecting a base material 6 (see FIG. 4) to be described later to a roll molding or an oxidation treatment.

The core material 2 is arranged along the extending direction of the outside molding 1, and a part of the core material 2 is fixed to the resin portion 3 in an exposed state. As shown in FIG. 3, the core material 2 has a buried region 2a embedded in the resin portion 3, an exposed region 2b whose one side is exposed to the outside, and a tip region connected to the lower end portion of the exposed region 2b. It has 2c.

The buried area 2a and the tip area 2c are arranged to face each other so as to sandwich the folded-back portion 11a of the door panel 11, the buried area 2a is arranged inside the vehicle, and the tip area 2c is arranged outside the vehicle. Further, the exposed region 2b is curved so as to connect the buried region 2a and the tip region 2c. This exposed area 2b is an area where the outer surface is exposed toward the outside of the vehicle when the outside molding 1 of the present embodiment is mounted on the vehicle. The surfaces of the buried area 2a and the tip area 2c cannot be visually recognized from the outside when the outside molding 1 of the present embodiment is mounted on the vehicle.

Further, the core material 2 has an oxide film 2d provided on the surface layer and a support layer 2e provided inside. The oxide film 2d forms the surface layer of the core material 2 and is formed so as to cover the entire area of the support layer 2e. The oxide film 2d is a film formed by, for example, anodizing a material for forming the support layer 2e (for example, stainless steel), and has a plurality of recesses communicating with the surface. Further, the oxide film 2d is formed on the entire front and back surfaces of the core material 2 including the region where the adhesive layer 4 contacts.

The oxide film 2d is fixed to the support layer 2e by a chemical bond, and many recesses (so-called pores) are formed on the surface thereof. Such an oxide film 2d is also provided on the surface side (the surface side facing the outside of the vehicle) of the exposed region 2b of the core material 2, and the core material is visible to an outsider due to the light interference effect. The color of the exposed area 2b of 2 is defined. The film thickness of such an oxide film 2d is set so that the color of the exposed region 2b of the core material 2 is recognized as a desired color. That is, in the present embodiment, the film thickness of the oxide film 2d is set so that the exposed region 2b of the core material 2 has a blackish metallic luster.

The support layer 2e is a portion where the oxide film 2d is fixed and supports the oxide film 2d, and the oxide film 2d is formed on the entire front and back surfaces. The support layer 2e is formed of a material (for example, stainless steel) before the oxide film 2d is oxidized.

The resin portion 3 is fixed to the surface of the core material 2 via the adhesive layer 4, and is a resin member formed of, for example, vinyl chloride. The resin portion 3 includes a base portion 3a in which the embedded region 2a of the core material 2 is arranged inside, an tilt prevention portion 3b for preventing the core material 2 from tilting, two lips 3c protruding inward of the vehicle, and an upper portion. It has a decorative lip 3d protruding from the surface and a cushioning lip 3e.

The base portion 3a is provided so as to cover the embedded region 2a of the core material 2 from both the front and back surfaces. It has an inner panel contact portion 3a1 that is provided so as to project toward the door panel 11 side of the base portion 3a. The inner panel contact portion 3a1 is arranged to face the tilt prevention portion 3b, and sandwiches the door panel 11 together with the tilt prevention portion 3b. When the door panel 11 is inserted into the gap between the inner panel contact portion 3a1 and the tilt prevention portion 3b, the internal lip 3b1 described later of the tilt prevention portion 3b is elastically deformed, and the door panel 11 is held by the restoring force of the internal lip 3b1. Will be done. That is, the outside molding 1 is fixed to the door panel 11 by sandwiching the door panel 11 between the inner panel contact portion 3a1 and the tilt prevention portion 3b.

Further, the base portion 3a includes a retaining portion 3a2. The retaining portion 3a2 is provided below the base portion 3a so as to project outward from the vehicle, and abuts from below on the end portion 11b of the door panel 11 that is directed downward to form the folded-back portion 11a. This prevents the outside molding 1 from coming out upward with respect to the door panel 11.

The tilt prevention portion 3b is arranged to face 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 the adhesive layer 4, and the core material 2 is prevented from tilting by supporting the core material 2 from the inside. There is.

The tilt prevention portion 3b has an internal lip 3b1 that is provided so as to project toward the door panel 11. The internal lip 3b1 is a lip that is elastically deformed by being pressed by the door panel 11 inserted between the base portion 3a and the tilt prevention portion 3b, and the door panel 11 is elastically deformed by the restoring force with the base portion 3a and the tilt prevention portion 3b. Hold between.

The lip 3c is in contact with the window plate 13 via the low friction layer 5, and prevents rainwater or the like from entering between the window plate 13 and the outside molding 1 of the present embodiment. Further, the lip 3c has flexibility to the extent that it does not hinder the raising and lowering of the window plate 13.

The decorative lip 3d is provided at the upper end portion of the base portion 3a, and is a portion protruding from the base portion 3a in the direction of the window plate 13. The cushioning lip 3e is provided in the tip region of the core material 2, and is a portion that abuts on the door panel 11 and elastically deforms. The cushioning lip 3e prevents rainwater or the like from entering between the door panel 11 and the outside molding 1 of the present embodiment, and absorbs variations during mounting. Further, the cushioning lip 3e is adhered to the surface of the core material 2 via the adhesive layer 4.

The adhesive layer 4 is interposed between the core material 2 and the resin portion 3, and adheres the core material 2 and the resin portion 3 to each other. That is, the resin portion 3 is fixed to the surface of the core material 2 via the adhesive layer 4. More specifically, the adhesive layer 4 is formed 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 resin portion 3. It is inserted between the buffer lip 3e and the cushion lip 3e. The adhesive layer 4 is, for example, a layer formed by heating and curing an acrylic thermosetting adhesive.

By using an adhesive made of an acrylic resin material, the acrylic contained in the adhesive is bound to oxygen contained in the oxide film 2d by hydrogen bonds. Therefore, it is possible to improve the bonding strength between the adhesive layer 4 and the core material 2.

The low friction layer 5 is a layer in which nylon pile or the like having a lower friction than the lip 3c is flocked, is formed on the surface of the lip 3c, and is in direct contact with the window plate 13. With such a low friction layer 5, the outside molding 1 of the present embodiment can be slidably brought into contact with the window plate 13 in a state where the surface of the window plate 13 is prevented from being scratched.

Subsequently, the manufacturing method (molding manufacturing method) of the outside molding 1 of the present embodiment will be described with reference to FIG. FIG. 4 is a schematic explanatory view for explaining the manufacturing method of the outside molding 1 of the present embodiment.

First, as shown in FIG. 4A, a flat metal base material 6 is prepared. The base material 6 may be a part of a strip-shaped metal material wound as a hoop material cut out, or may be a base material 6 before cutting out a strip-shaped metal material drawn out from the hoop material. good. For example, since the base material 6 is the core material 2 described above, when the core material 2 is made of stainless steel, it is naturally made of stainless steel.

Subsequently, as shown in FIG. 4B, the base material 6 is formed into the shape of the core material 2. For example, the cross-sectional shape of the flat metal base material 6 drawn out from the hoop material without being cut is made into the cross-sectional shape of the core material 2 by roll molding. Then, the base material 6 is cut out to a required length. Further, by performing drawing processing on the end portion of the cut-out base material 6, a lid portion is formed at the end portion of the base material 6 as shown in FIG. Such a step shown in FIG. 4B corresponds to a base material forming step of molding a flat metal base material.

Subsequently, as shown in FIG. 4C, the surface layer of the base material 6 is subjected to an oxidation treatment to form the base material 6 as the core material 2. Here, for example, the surface layer of the base material 6 is oxidized by energizing in an electrolytic solution using sulfuric acid with the base material 6 as an anode. By such an oxidation treatment, an oxide film 2d is formed on the surface layer of the base material 6, and the core material 2 has the oxide film 2d and the support layer 2e. Such a step shown in FIG. 4C corresponds to an oxidation treatment step of forming the core material 2 by oxidizing the surface layer of the base material 6 after the base material molding step.

Subsequently, as shown in FIG. 4D, the resin portion 3 is provided on the surface of the core material 2. Here, for example, before the resin portion 3 is provided, the adhesive is arranged on the surface of the core material 2 at least in accordance with the region where the resin portion 3 is provided. After that, the resin portion 3 formed separately from the core material 2 by injection molding or the like is adhered to the core material 2 via an adhesive. Further, the resin portion 3 is fixed to the surface of the core material 2 by drying the adhesive. Such a step shown in FIG. 4D corresponds to a resin portion installation step in which 3 resin portions are provided on the surface of the core material 2.

The outside molding 1 is manufactured through the steps shown in FIG. In the manufacturing method of the outside molding 1 of the present embodiment as described above, the core material 2 made of a metal material whose surface layer has been oxidized and the resin portion 3 fixed to at least a part of the surface of the core material 2 are formed. Manufacture the outside molding 1 to have. Further, the method for manufacturing the outside molding 1 of the present embodiment is a base material molding step of molding a flat metal base material 6, and an oxidation treatment of the surface layer of the base material 6 after the base material molding step. It has an oxidation treatment step for forming the core material 2 and a resin portion installation step for providing the resin portion 3 on the surface of the core material 2.

According to the method for producing the outside molding 1 of the present embodiment, the flat base material 6 is formed into the shape of the core material 2, and then the surface layer of the base material 6 is oxidized. Therefore, it is possible to prevent the oxide film 2d from undergoing a structural change due to the curvature of the base material 6, and it is possible to suppress the occurrence of unintended discoloration of the core material 2. Further, according to the manufacturing method of the outside molding 1 of the present embodiment, after the surface layer of the base material 6 is oxidized, the resin portion 3 is provided on the surface of the core material 2. Therefore, the resin portion 3 is not exposed to the oxidation treatment environment, and deterioration of the resin portion 3 can be suppressed. Therefore, according to the manufacturing method of the outside molding 1 of the present embodiment, the core material 2 made of a metal material whose surface layer has been oxidized and the resin portion 3 fixed to at least a part of the surface of the core material 2 are formed. The outside molding 1 having the core material 2 can suppress unintended discoloration of the core material 2 and deterioration of the resin portion 3.

Further, in the manufacturing method of the outside molding 1 of the present embodiment, the end portion of the base material 6 is drawn in the base material forming step. The drawing process is a process in which the base material 6 is locally largely curved. Even when such drawing processing is performed, it is possible to suppress unintended discoloration of the core material 2 according to the manufacturing method of the outside molding 1 of the present embodiment.

Further, in the method for producing the outside molding 1 of the present embodiment, the oxidation treatment step is an anodization treatment using the base material 6 as an anode. By oxidizing the surface layer of the base material 6 by such anodizing treatment, an oxide film 2d having a uniform film thickness can be formed on the entire core material 2. Therefore, it is possible to use the core material 2 having less color unevenness.

Further, in the manufacturing method of the outside molding 1 of the present embodiment, before the resin portion 3 is provided in the resin portion installation step, an adhesive is applied to the surface of the core material 2 at least according to the region where the resin portion 3 is provided. Is placed. Therefore, the resin portion 3 can be reliably fixed to the surface of the core material 2.

Further, it has been described that it is preferable to use an adhesive made of an acrylic resin material in the method for producing the outside molding 1 of the present embodiment. In this way, by using the adhesive made of an acrylic resin material, as described above, the adhesive layer 4 and the oxide film 2d are firmly bonded by hydrogen bonds, so that the resin portion 3 is more firmly cored. It can be fixed to the material 2.

Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to the above embodiment. The various shapes and combinations of the constituent members shown in the above-described embodiment are examples, and can be variously changed based on design requirements and the like without departing from the spirit of the present invention.

For example, in the above embodiment, the configuration in which the core material 2 has a black metallic luster has been described. However, the present invention is not limited to this. For example, it is possible to adopt a configuration having a metallic luster of another color such as red or blue.

Further, for example, a mask may be installed on a part of the surface of the base material 6 before performing the oxidation treatment step. In the region where such a mask is installed, the oxide film 2d is not formed in the oxidation treatment step. Therefore, even after the mask is removed, the oxide film 2d can be kept in a patterned state, and the color of the core material 2 can be changed depending on the location. Such a mask is not always installed in an area that can be visually recognized from the outside when the core material 2 is used. When the mask is installed in a region that cannot be seen from the outside, for example, a mark indicating that the oxide film 2d was formed after the base material forming step can be formed on the core material 2.

Further, in the above embodiment, the step of forming the core material 2 by anodizing the base material 6 has been described. However, the present invention is not limited to this. For example, it is also possible to obtain the core material 2 by subjecting the base material 6 to a chemiluminescent treatment and a dura mater treatment. The chemiluminescent treatment is a step of immersing the base material 6 in a solution containing, for example, sulfuric acid (H ₂ SO ₄ ) or chromium (Cr) to form an oxide film on the surface of the base material 6 to cause chemiluminescence. .. Further, in the dura mater treatment, the base material 6 on which the oxide film is formed by the chemical color development treatment is immersed in a solution mainly containing, for example, chromium (Cr), and the solution is electrolyzed to form a hard material such as chromium oxide. This is a step of forming a film on the surface of the base material 6. That is, in the present invention, it is also possible to adopt a configuration in which the oxidation treatment step includes a chemiluminescent step of chemically developing the base material 6 in a solution and a dura mater treatment step of curing the surface of the base material 6. is there. It is possible to improve the surface hardness of the core material 2 by adopting a configuration in which a two-step treatment including such a chemiluminescent step and a dura mater treatment step is performed.

Further, in the above embodiment, the configuration in which the molding of the present invention is the outside molding 1 has been described. However, the present invention is not limited to this. The present invention can be applied as long as the molding has a resin portion fixed to a core material whose surface layer has been oxidized.

1 ... Outside molding (molding), 2 ... Core material, 2d ... Oxide film, 2e ... Support layer, 3 ... Resin part, 4 ... Adhesive layer, 5 ... Low friction layer, 6 ... Base material

Claims (6)

A molding manufacturing method for manufacturing a molding having a core material made of a metal material whose surface layer has been oxidized and a resin portion fixed to at least a part of the surface of the core material.
The base material molding process for molding a flat metal base material and
After the base material molding step, an oxidation treatment step of forming the core material by oxidizing the surface layer of the base material, and
A molding manufacturing method comprising a resin portion installation step of providing the resin portion on the surface of the core material. The molding manufacturing method according to claim 1, wherein the edge portion of the base material is drawn in the base material molding step. The molding manufacturing method according to claim 1 or 2, wherein the oxidation treatment step is an anodization treatment using the base material as an anode. The molding production according to claim 1 or 2, wherein the oxidation treatment step includes a chemical color development step of chemically developing the base material in a solution and a dura mater treatment step of curing the surface of the base material. Method. Any of claims 1 to 4, wherein in the resin portion installation step, the adhesive is arranged on the surface of the core material at least in accordance with the region where the resin portion is provided before the resin portion is provided. The molding manufacturing method according to one item. The molding manufacturing method according to claim 5, wherein the adhesive is an acrylic resin material.

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