JP7501394B2 - Vehicle decoration materials - Google Patents

Description

The present invention relates to a decorative member for a vehicle.

Various types of vehicle decorative parts are attached to typical vehicles. Vehicle decorative parts constitute part or all of vehicle exterior parts attached to the exterior surface of the vehicle, or vehicle interior parts attached to the interior of the vehicle. Examples of vehicle exterior parts include a front grille, a back door panel, a front garnish, and a rear garnish. On the other hand, examples of vehicle interior parts include a center console box and an instrument panel.

In recent years, there has been an increasing demand for lighter vehicles, and lighter vehicle decorative parts are also required. For this reason, it has become common to select resin as the material for vehicle decorative parts (see, for example, Patent Document 1).

JP 2013-112179 A

The vehicle decorative member disclosed in Patent Document 1 has a housing that is attached to a vehicle, and a transparent or translucent lens member that covers the housing from the front side. The housing is provided with a housing design surface, and the design displayed on the housing design surface is visible from the front side of the vehicle through the lens member. The lens member has a protrusion that protrudes toward the housing. The protrusion has the function of refracting light that is incident on the lens.

However, in order to mold large vehicle exterior parts such as front grilles from resin, a mold with a large cavity volume is required. In a mold with a large cavity volume, the pressure-receiving area is also large, and the output required for the molding machine to perform resin molding using the mold is also large.

In recent years, vehicles that do not require much air cooling, such as electric vehicles, have become more prevalent. Accordingly, the number of vehicle exterior parts arranged at the front of the vehicle, such as front grilles, that do not have openings is increasing.
For vehicle decorative members of the same external dimensions, those without openings have a larger volume than those with openings. Therefore, when manufacturing a large vehicle decorative member without openings, the volume of the cavity increases further, and a special molding machine with high output is required.
For this reason, in consideration of the manufacturing costs, it is currently not realistic to increase the size of a vehicle decorative member having no opening.

The present invention was made in consideration of the above circumstances, and aims to provide a technology that allows even large vehicle decorative components to be molded using a general-purpose molding machine.

The method for producing a decorative member for a vehicle according to the present invention which solves the above problems is as follows:
A first molding process of molding a first region, which is a part of a plurality of regions divided in a surface direction perpendicular to a thickness direction of the vehicle decorative member, using a first transparent resin as a material;
a second molding step of molding a second region, which is another part of the plurality of regions, using a second transparent resin as a material after the first molding step;
and forming a design portion on a back surface of the first region and/or the second region,
In the method for manufacturing a decorative member for a vehicle, the first transparent resin and the second transparent resin are equivalent in at least one of refractive index, color, and visible light transmittance.

The manufacturing method for vehicle decorative members of the present invention allows even large vehicle decorative members to be molded using a general-purpose molding machine.

1 is an explanatory diagram showing a schematic view of a vehicle decorative member manufactured by the manufacturing method of a vehicle decorative member according to Example 1, as viewed from the front side; FIG. 1 is an explanatory diagram showing a schematic view of a first region of a vehicle decorative member manufactured by the manufacturing method of a vehicle decorative member according to Example 1, as viewed from the front side; FIG. 1 is an explanatory diagram illustrating a schematic view of a second region of a vehicle decorative member manufactured by the manufacturing method of a vehicle decorative member according to Example 1, as viewed from the front side. FIG. 2 is an explanatory diagram showing a schematic view of the vehicle decorative member manufactured by the method for manufacturing a vehicle decorative member according to the first embodiment, cut at the AA position in FIG. 1; FIG. 2 is an explanatory diagram showing a schematic view of a vehicle decorative member manufactured by the method for manufacturing a vehicle decorative member according to Example 2, cut at the same position as the AA position in FIG. 1. FIG. 1. FIG. 4 is an explanatory diagram showing a schematic view of a vehicle decorative member manufactured by the method for manufacturing a vehicle decorative member according to Example 3, cut at the same position as the AA position in FIG.

Hereinafter, as necessary, the manufacturing method of the vehicle decorative member of the present invention may be simply referred to as the manufacturing method of the present invention. Also, the vehicle decorative member manufactured by the manufacturing method of the present invention may be referred to as the vehicle decorative member of the present invention.

The production method of the present invention comprises the steps of:
A first molding process of molding a first region, which is a part of a plurality of regions divided in a surface direction perpendicular to a thickness direction of the vehicle decorative member, using a first transparent resin as a material;
a second molding step of molding a second region, which is another part of the plurality of regions, using a second transparent resin as a material after the first molding step;
and forming a design portion on a rear surface of the first region and/or the second region.
The first transparent resin and the second transparent resin are equivalent in at least one of refractive index, color, and visible light transmittance.

In the manufacturing method of the present invention, the vehicle decorative member is divided into a plurality of parts in the surface direction, and is divided into at least two regions, a first region and a second region. The process of molding the vehicle decorative member is divided into at least two processes, a first molding process for molding the first region and a second molding process for molding the second region. Therefore, the volume of the portion of the vehicle decorative member molded in one process is small. In addition, the pressure-receiving area of the molding die for molding that portion is smaller than the pressure-receiving area of the molding die for molding the entire vehicle decorative member. The output required for the molding machine for resin molding using that molding die is also reduced. As a result, according to the manufacturing method of the present invention, even large vehicle decorative members can be molded with a general-purpose molding machine, and even large vehicle decorative members such as front grilles that have no openings or few openings can be molded with a general-purpose molding machine.

Moreover, the first region in the vehicle decorative member of the present invention is transparent since it is made of the first transparent resin, and the second region is also transparent since it is made of the second transparent resin.
In the manufacturing method of the present invention, a design part is formed on the back surface of the first region and/or the second region by a design part forming step. Therefore, the vehicle decorative member of the present invention can be said to have a two-layer structure having a design part and a transparent layer that includes the first region and the second region and covers the front side of the design part. The surface of the vehicle decorative member of the present invention can be said to display the design of the design part through the first region and/or the second region, which are transparent layers.

In the manufacturing method of the present invention, the first transparent resin, which is the material of the first region, and the second transparent resin, which is the material of the second region, are equivalent in at least one of the refractive index, color, and visible light transmittance, so that the boundary between the first region and the second region is difficult to visually recognize, and when a user, a passerby, or the like views the vehicle decorative member of the present invention from the front side, the design portion is clearly displayed without distortion.
Therefore, according to the manufacturing method of the present invention, even though the transparent layer is divided into two regions, a first region and a second region, it is possible to display the design of the design portion through the transparent layer while remaining clear and beautiful.

The manufacturing method of the present invention will be explained below for each component.

In the manufacturing method of the present invention, the vehicle decorative member is divided into a first region and a second region, which are molded in separate processes.

The first region is made of a first transparent resin. In this specification, "transparent" means that the visible light transmittance is 80% or more. The first transparent resin is not particularly limited as long as it is transparent, but considering durability, polycarbonate (PC), polymethyl methacrylate (PMMA: so-called acrylic resin), polyethylene terephthalate (PET), styrene acrylonitrile copolymer (SAN or AS resin), polycyclohexyl methacrylate (PCHMA), etc. are suitable.

The second region is formed by a second molding process that is separate from the first molding process that forms the first region. The first region and the second region may be the same size, or one may be larger than the other. With the reduction of the pressure-receiving area of the molding die in mind, it is preferable that the difference in size between the first region and the second region is small, particularly when the vehicle decorative member is large. Specifically, the projected area of the first region, projected in the thickness direction of the vehicle decorative member, is preferably within a range of 20 to 400 area % of the projected area of the second region, projected in the thickness direction of the vehicle decorative member, more preferably within a range of 30 to 300 area %, and even more preferably within a range of 50 to 200 area %.

The molding method for forming the first and second regions can be any known method, such as an insert molding method in which a previously molded first region is used as an insert, or a two-color molding method in which part of the mold for the previously molded first region is also used to mold the second region.

The second transparent resin, which is the material of the second region, may be equivalent to the first transparent resin in at least one of the refractive index, color, and visible light transmittance. It is particularly preferable that the second transparent resin is equivalent to the first transparent resin in refractive index. By making the refractive indexes of the first and second transparent resins equivalent, the boundary between the first and second regions becomes difficult to visually distinguish, and the first and second regions appear to be one continuous transparent layer.

Here, in this specification, the refractive index is equivalent means that the difference in refractive index is less than 0.1, preferably 0.095 or less, 0.075 or less, 0.05 or less, or less than 0.05. If the difference in refractive index between the two is within this range, the boundary between the first region and the second region becomes difficult to distinguish sufficiently, and the two are visually perceived as being one. The refractive index may be measured in accordance with JIS K 7142:2014.

In addition, in this specification, the term "equivalent in color" means that the difference in hue on the Munsell color chart is within 2. Specifically, in the Munsell color chart, hues are divided into 10 consecutive stages: R (red), YR (yellow-red), Y (yellow), GY (yellow-green), G (green), BG (blue-green), B (blue), PB (purple-blue), P (purple), and RP (red-purple). Note that R and RP are considered to be consecutive. In these 10 stages, if the difference between the hues is within 2, the colors can be determined to be equivalent. More specifically, for example, if the hue of the first transparent resin is R, and the hue of the second transparent resin is YR, Y, RP, or P, the second transparent resin can be said to be equivalent in color to the first transparent resin.

In addition, in this specification, the visible light transmittance is equivalent means that the difference in visible light transmittance is 10% or less, preferably 5% or less. Visible light transmittance may be measured in accordance with the total light transmittance specified in JIS K 7375:2008.

The second transparent resin only needs to satisfy at least one of the above-mentioned requirements, and may be different from or the same as the first transparent resin.

For example, when molding the vehicle decorative member of the present invention using a two-color molding method or an insert molding method, it is preferable that the first transparent resin and the second transparent resin are the same in order to make the first region and the second region compatible and firmly integrated.

In addition, during molding, in order to suppress changes in the shape of the first or second region that is molded first, i.e., the first region, it is preferable that the first transparent resin and the second transparent resin are different. In this case, it is further preferable that the first transparent resin and the second transparent resin differ in softening temperature by 5°C or more, and more preferably by 10°C or more. The material with the lower softening temperature can be used for the second region, which is molded later, out of the first and second regions. The softening temperature can be measured in accordance with the Vicat softening temperature (B50 method) of JIS K 7206.

The thickness of the first region and the second region may be the same or different. Furthermore, the first region and the second region may be arranged smoothly without any steps, or may be arranged in a stepped shape. By arranging the first region and the second region smoothly without any steps, the sense of unity between the first region and the second region is enhanced. Furthermore, by arranging the first region and the second region in a stepped shape, a three-dimensional design resulting from the steps is imparted to the vehicle decorative member.

The step may be provided on the front side or the back side of the vehicle decoration member. When the step is provided on the back side of the vehicle decoration member, it is preferable to arrange the first and second regions smoothly without any step on the front side of the vehicle decoration member. In this way, the vehicle decoration member displays a smooth design resulting from the front side where the first and second regions are smoothly connected, and a rhythmic design resulting from the back side where the first and second regions are connected in a stepped manner, overlapping in the depth direction. In addition, a design part is further formed on the back side of the first and/or second region. Therefore, the design part is arranged along the step formed on the back side of the first and second regions. As a result, the step-like connection of the first and second regions on the back side can be clearly seen from the front side of the vehicle decoration member.

The manufacturing method of the present invention includes a design portion forming step in addition to the first region molding step and second molding step described above. The design portion is a portion for displaying a design on the front side of the vehicle decorative member through the second region and/or the first region. Such a design portion differs from the first region and the second region in refractive index, color, and visible light transmittance. The design portion may be formed in only one of the first region and the second region, or may be formed in both the first region and the second region. The design portion formed on the back side of the first region and the design portion formed on the back side of the second region may be the same or different.

Furthermore, the design portion may be flat or may have a three-dimensional shape that conforms to the back surface of the first region or the second region. When the design portion has a three-dimensional shape, the vehicle decorative member of the present invention can display a design with three-dimensional depth.

The design portion may be formed, for example, by attaching a sheet having metal or paint to the back surface of the first region and/or the second region. Alternatively, it may be formed directly on the back surface of the first region and/or the second region by a method such as printing or painting. Furthermore, when molding the first region and/or the second region, a three-dimensional shape such as a grain may be molded on the back surface, and the part of the first region and/or the second region in which the grain is formed may be used as the design portion. For example, when a grained design portion is formed on the back surface of the first region, the interface of the first region with the design portion becomes the back surface of the second region.

The manufacturing method of the vehicle decorative member of the present invention is preferably used as a method for manufacturing the vehicle exterior parts described above. In particular, the manufacturing method of the present invention is suitable as a method for manufacturing large vehicle exterior parts with no or few openings, specifically front grilles.

The manufacturing method of the present invention will be explained below using specific examples.

Example 1
The manufacturing method of Example 1 is a method for manufacturing a front grille of a vehicle. FIG. 1 shows an explanatory diagram that typically shows the state of the vehicle decoration member of Example 1 manufactured by the manufacturing method of Example 1 as viewed from the front side. FIG. 2 shows an explanatory diagram that typically shows the state of the first region of the vehicle decoration member of Example 1 as viewed from the front side. FIG. 3 shows an explanatory diagram that typically shows the state of the second region of the vehicle decoration member of Example 1 as viewed from the front side. FIG. 4 shows an explanatory diagram that typically shows the state of the vehicle decoration member of Example 1 cut at the position A-A in FIG. 1. Hereinafter, the front and back refer to the front and back shown in FIG. 4. Furthermore, the top, bottom, left, and right refer to the top, bottom, left, and right shown in FIGS. 1 to 3.
The front-back direction coincides with the thickness direction of the vehicle decorative member. Furthermore, the up-down and left-right directions perpendicular to the front-back direction correspond to the surface directions in the manufacturing method of the present invention. For reference, in the vehicle decorative member of Example 1 attached to a vehicle, the front side is the front side in the vehicle travel direction, that is, the side exposed to the outside of the vehicle, and the back side is the rear side in the vehicle travel direction, that is, the side hidden by the vehicle body.

As shown in FIG. 1, the vehicle decorative member 1 of Example 1 manufactured by the manufacturing method of Example 1 includes a first region 10, a second region 20, and a design portion 30 (see FIG. 3).
The first region 10 is made of PMMA, which is a type of transparent resin, and the second region 20 is also made of PMMA. The PMMA in the vehicle decorative member 1 of Example 1 corresponds to the first transparent resin in the manufacturing method of the present invention, and also corresponds to the second transparent resin.

As shown in FIG. 1, the vehicle decorative member 1 is divided into a plurality of regions in a plane direction perpendicular to the thickness direction, i.e., in the up-down and left-right directions. In the vehicle decorative member 1 of Example 1, one of the plurality of regions is a first region 10, and the others are second regions 20.

As shown in FIG. 2, the first region 10 has a plurality of window portions 15 penetrating the vehicle decorative member 1 in the thickness direction, and is generally plate-shaped extending in the surface direction. The window portions 15 are spaced apart from one another and distributed in the surface direction. The window portions 15 can be considered to be spaces provided for disposing the second region 20.

As shown in FIG. 3, the second region 20 is an assembly of multiple small, plate-like second division bodies 25. The second division bodies 25 are substantially the same shape as the window portion 15, and like the window portion 15, are spaced apart and distributed in the planar direction.

In the vehicle decorative member of Example 1, the projected area of the first region 10 in the thickness direction was approximately 120% of the projected area of the second region 20 in the thickness direction.

As shown in FIG. 4, the design portion 30 is formed by painting on the back surface 21 of the second region 20, more specifically, on the back surface of the second divided body 25. The design portion 30 is not formed on the back surface 11 of the first region 10. Therefore, when the vehicle decorative member 1 of Example 1 is viewed from the front side, only the portion corresponding to the second region 20 appears to be colored, and the other portions appear to be transparent.

In the vehicle decorative member 1 of Example 1, the back surface 11 of the first region 10 and the back surface 21 of the second region 20 are smoothly continuous. In addition, the front surface 12 of the first region 10 and the front surface 22 of the second region 20 are also smoothly continuous. Therefore, the front surface of the vehicle decorative member 1 of Example 1 displays a smoothly arranged design derived from the back surface 11 of the first region 10, the back surface 21 of the second region 20, the front surface 12 of the first region 10, and the front surface 22 of the second region 20.

The first transparent resin, which is the material of the first region 10, and the second transparent resin, which is the material of the second region 20, are equivalent in refractive index, color, and visible light transmittance. For this reason, the boundary between the first region 10 and the second region 20 is difficult to see, and when viewed from the front side of the vehicle decorative member, the first region 10 and the second region 20 appear to be a single continuous transparent layer. As a result, the design portion 30 is clearly displayed without distortion on the surface of the vehicle decorative member 1 of Example 1, and the vehicle decorative member 1 of Example 1 exhibits excellent design properties.

In the manufacturing method of Example 1, the vehicle decorative member 1 is manufactured using a two-color molding method, which is a type of injection molding method. The manufacturing method of Example 1 is described below.

(First molding process)
The first molding step is a step of molding the first region 10 using a first transparent resin as a material. More specifically, in the first molding step, the first transparent resin (not shown) in a fluid state is injected into a cavity (not shown) of a mold for molding the first region 10, thereby molding the first region 10. As described above, the vehicle decorative member 1 of Example 1 is a front grille for a vehicle, and does not have any openings as a whole.

As shown in FIG. 2, the first region 10 has a plurality of window portions 15 distributed in the planar direction. Therefore, the mold for molding the first region 10 has a mold surface (not shown) that extends in the thickness direction of the first region 10 in the portion corresponding to the window portion 15. Therefore, the volume of the cavity of the mold for molding the first region 10 is smaller than the outer dimensions of the first region 10 to be molded. In other words, the volume of the cavity of the mold used in the first molding step is smaller than the outer dimensions of the vehicle decorative member 1. And, the pressure-receiving area of the mold is smaller than the pressure-receiving area of the mold for molding the entire vehicle decorative member 1. As a result, in the first molding step in the molding method of Example 1, it is possible to mold the first region 10 using a general-purpose molding machine, rather than a high-output special molding machine.

(Second molding step)
The second molding step is a step of molding the second region 20 using the second transparent resin as a material after the first molding step. More specifically, in the second molding step, the second transparent resin (not shown) in a fluid state is injected into a cavity (not shown) of a molding die for molding the second region 20, thereby molding the second region 20.

As shown in FIG. 3, the second region 20 is an assembly of a plurality of second divided bodies 25 distributed at positions corresponding to the window portions 15. For this reason, the mold for molding the second region 20 has a mold surface (not shown) extending in the thickness direction of the second region 20 at a position corresponding to the gap between the second divided bodies 25. For this reason, the volume of the cavity of the mold for molding the second region 20 is smaller than the outer dimensions of the second region 20 to be molded. In other words, the volume of the cavity of the mold used in the second molding step is also smaller than the outer dimensions of the vehicle decorative member 1. And the pressure-receiving area of the mold is also smaller than the pressure-receiving area of the mold for molding the entire vehicle decorative member 2. As a result, even in the second molding step in the molding method of Example 1, it is possible to mold the second region 20 using a general-purpose molding machine, rather than a high-output special molding machine.

(Design part forming process)
In the design portion forming step in the manufacturing method of the first embodiment, the design portion 30 is formed on the back surface 21 of the second region 20 by painting.
The vehicle decorative member 1 of the first embodiment is manufactured by the above-mentioned first molding step, second molding step, and design portion forming step.

According to the manufacturing method of Example 1, the vehicle decorative member 1 is divided into a first region 10 and a second region 20 and manufactured in two processes. Even though the vehicle decorative member 1 has no openings and a large outer shape and is resin molded, it is possible to use a general-purpose molding machine instead of a high-output specialized molding machine.

Example 2
The manufacturing method of Example 2 is generally the same as that of Example 1, except for the positional relationship between the rear surface of the first region and the rear surface of the second region, and the position of the design portion. Fig. 5 is an explanatory diagram showing a schematic cut of the vehicle decorative member of Example 2 at the same position as the position A-A in Fig. 1. The manufacturing method of Example 2 will be described below, focusing on the differences from the manufacturing method of Example 1.

In the vehicle decorative member 1 of Example 2 manufactured by the manufacturing method of Example 2, the surface 12 of the first region 10 and the surface 22 of the second region 20 are smoothly continuous, but the back surface 11 of the first region 10 and the back surface 21 of the second region 20 are stepped. Therefore, in the vehicle decorative member 1 of Example 2, a smoothly arranged design resulting from the surface 12 of the first region 10 and the surface 22 of the second region 20, and a rhythmic design resulting from the back surface 11 of the first region 10 and the back surface 21 of the second region 20 are displayed with depth in the thickness direction of the vehicle decorative member 1. As a result, the vehicle decorative member 1 of Example 2 exhibits excellent design.

Also, in the vehicle decorative member 1 of Example 2, the first transparent resin that is the material of the first region 10 and the second transparent resin that is the material of the second region 20 are equivalent in refractive index, color, and visible light transmittance. Therefore, the boundary between the first region 10 and the second region 20 is difficult to see in the surface direction of the vehicle decorative member 1. This also allows the vehicle decorative member 1 of Example 2 to exhibit excellent design.

In the manufacturing method of Example 2, similar to the manufacturing method of Example 1, the vehicle decorative member 1 is divided into a first region 10 and a second region 20 and manufactured in two processes. As a result, even in the manufacturing method of Example 2, even though the vehicle decorative member 1, which has no opening and a large outer shape, is resin molded, it is possible to use a general-purpose molding machine rather than a high-output specialized molding machine.

Example 3
The manufacturing method of Example 3 is generally the same as that of Example 2, except for the positional relationship between the surface of the first region and the surface of the second region. Fig. 6 is an explanatory diagram showing a schematic cut of the vehicle decorative member of Example 3 at the same position as the position A-A in Fig. 1. The manufacturing method of Example 3 will be described below, focusing on the differences from the manufacturing method of Example 2.

In the vehicle decorative member 1 of Example 3 manufactured by the manufacturing method of Example 3, the back surface 11 of the first region 10 and the back surface 21 of the second region 20 are continuous in a stepped manner, and the front surface 12 of the first region 10 and the front surface 22 of the second region 20 are also continuous in a stepped manner. Therefore, in the vehicle decorative member 1 of Example 3, the rhythmic design derived from the front surface 12 of the first region 10 and the front surface 22 of the second region 20, and the rhythmic design derived from the back surface 11 of the first region 10 and the back surface 21 of the second region 20 are displayed with depth in the thickness direction of the vehicle decorative member 1. As a result, the vehicle decorative member 1 of Example 2 exhibits excellent design.

Also, in the vehicle decorative member 1 of Example 3, the first transparent resin that is the material of the first region 10 and the second transparent resin that is the material of the second region 20 are equivalent in refractive index, color, and visible light transmittance. Therefore, the boundary between the first region 10 and the second region 20 is difficult to see in the surface direction of the vehicle decorative member 1. This also allows the vehicle decorative member 1 of Example 3 to exhibit excellent design.

Furthermore, in the vehicle decorative member 1 of Example 3, the surface 12 of the first region 10 and the surface 22 of the second region 20, which are the parts that are noticeable to users, pedestrians, etc., are continuous in a stepped shape. In other words, the surface of the vehicle decorative member 1 of Example 3 has an uneven shape. Therefore, even if some shape defects occur on the surface 12 of the first region 10 and the surface 22 of the second region 20, such as sink marks due to shrinkage during molding, the shape defects are masked by the uneven shape of the surface of the vehicle decorative member 1, and are difficult to be perceived by users, etc.
Therefore, the manufacturing method of Example 3 has the advantage that it is possible to absorb the variation in shape that occurs during molding, and to easily and inexpensively manufacture the vehicle decorative member 1 that is recognized as having excellent design.

Of course, in the manufacturing method of Example 3, as in the manufacturing methods of Examples 1 and 2, the vehicle decorative member 1 is divided into a first region 10 and a second region 20 and manufactured in two steps. As a result, in the manufacturing method of Example 3, even though the vehicle decorative member 1, which has no opening and a large outer shape, is resin molded, it is possible to use a general-purpose molding machine rather than a high-output specialized molding machine.

The present invention is not limited to the embodiment described above and shown in the drawings, and can be modified as appropriate without departing from the spirit of the invention. Furthermore, each of the components shown in this specification, including the embodiment, can be arbitrarily extracted and combined for implementation.

1: Vehicle decorative member 10: First region 11: Back surface of first region 12: Front surface of first region 15: Window portion 20: Second region 21: Back surface of second region 22: Front surface of second region 25: Second divided body 30: Design portion

Claims (6)

A first molding process of molding a first region, which is a part of a plurality of regions divided in a surface direction perpendicular to a thickness direction of the vehicle decorative member, using a first transparent resin as a material;
a second molding step of molding a second region, which is another part of the plurality of regions, using a second transparent resin as a material after the first molding step;
and forming a design portion on a rear surface of the first region and/or the second region,
The first transparent resin and the second transparent resin are the same in at least one of refractive index, color, and visible light transmittance ,
A method for manufacturing a vehicle decorative member , wherein the surface of the first region and the surface of the second region are continuous in a stepped manner . A first molding process of molding a first region, which is a part of a plurality of regions divided in a surface direction perpendicular to a thickness direction of the vehicle decorative member, using a first transparent resin as a material;
a second molding step of molding a second region, which is another part of the plurality of regions, using a second transparent resin as a material after the first molding step;
and forming a design portion on a rear surface of the first region and/or the second region,
The first transparent resin and the second transparent resin are the same in at least one of refractive index, color, and visible light transmittance ,
A method for manufacturing a vehicle decorative member , wherein the back surface of the first region and the back surface of the second region are continuous in a stepped manner . The method for manufacturing a vehicle decorative member according to claim 1 , wherein the back surface of the first region and the back surface of the second region are continuous in a stepped manner. The method for manufacturing a vehicle decorative member according to claim 2 or 3, wherein the design portion covers the entire back surface of the first region and the second region and has a three-dimensional shape. The method for manufacturing a vehicle decorative member according to claim 2 or claim 4 which relies on claim 2, wherein the surface of the first region and the surface of the second region are smoothly continuous. The method for manufacturing a decorative member for a vehicle according to any one of claims 1 to 5 , wherein the projected area of the first region projected in the thickness direction is within a range of 20 to 400 area% of the projected area of the second region projected in the thickness direction.

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