JP7276266B2 - Decorative parts for vehicles - Google Patents

Description

TECHNICAL FIELD The present invention relates to a vehicle decorative component for decorating a vehicle.

In a vehicle in which a millimeter wave radar device is installed, millimeter waves are transmitted out of the vehicle from the same device. Millimeter waves reflected by objects outside the vehicle, including preceding vehicles and pedestrians, are received by the millimeter wave radar device. The millimeter-wave radar device recognizes the object and detects the distance and relative speed between the vehicle and the object using the transmitted and received millimeter waves.

In the above-described vehicle, vehicle decorative parts such as a front grill and an emblem are arranged in front of the millimeter wave radar device in the transmission direction of millimeter waves, as described in Patent Document 1. A vehicle decorative component includes a resin base material and a transparent resin layer formed on the front side of the resin base material, and has millimeter wave permeability. Furthermore, in order to suppress damage to the vehicle decorative component, a hard coat layer is formed on the resin substrate and the transparent resin layer by applying a hard coat agent.

JP 2020-5057 A

The resin base material and the transparent resin layer in the vehicle decorative component are formed in close contact with each other by resin molding.
However, the resin base material and the transparent resin layer are not completely adhered by resin molding. Therefore, the solvent in the hard coating agent applied to the resin base material and the transparent resin layer penetrates the interface between the resin base material and the transparent resin layer from the side surface of the vehicle decorative component, and corrodes the interface and the surrounding area. . As a result, there is a concern that the adhesion between the resin base material and the transparent resin layer may decrease. Such problems are not limited to hard coating agents, and can occur in the same manner as described above when other kinds of solvents enter the interface between the resin substrate and the transparent resin layer.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a vehicle decorative component capable of suppressing deterioration of adhesion between a resin substrate and a transparent resin layer due to infiltration of a solvent. to provide.

A vehicle decorative part that solves the above problems includes a resin base material, and a transparent resin layer formed on the front side of the resin base material and closely attached to the side part of the surface of the resin base material on the side part of the back surface of the resin base material. and a transparent resin film laminated on at least the surface of the transparent resin layer, wherein the side portion of the resin film is the side surface of the transparent resin layer and the side surface of the resin base material. covers the boundary of

According to the above configuration, the side portion of the resin film covering the boundary portion between the side surface of the transparent resin layer and the side surface of the resin base restricts the solvent from reaching the boundary portion, and prevents the solvent from reaching the boundary portion. It regulates intrusion into the interface between the transparent resin layer and the resin substrate. The solvent is less likely to enter the interface than when the boundary is not covered with the side of the resin film. Therefore, the phenomenon in which the interface between the transparent resin layer and the resin substrate and the peripheral portion of the interface is eroded by the solvent is less likely to occur. As a result, the adhesion between the transparent resin layer and the resin substrate is less likely to deteriorate.

In the vehicle decorative component described above, it is preferable that the resin film has a transparent hard coat layer formed thereon.
According to the above configuration, when the hard coating agent is applied to form the hard coating layer, the solvent in the hard coating agent flows between the resin film and the resin substrate due to the resin film. be prevented. It becomes difficult for the solvent to reach the boundary portion, and it is difficult for the solvent to enter the interface between the transparent resin layer and the resin substrate.

Further, when force is applied to the vehicle decorative component from the front side or the side, the force is received by the hard coat layer. The hard coat layer prevents the member on the back side of the hard coat layer from being damaged by the force.

In the vehicle decorative component described above, the resin base material includes a base material main body portion and an annular frame portion formed on a front side portion of the base material main body portion, and the resin base material includes the frame portion. is in close contact with the side portion of the back surface of the transparent resin layer, the side portion of the surface of the base body portion is in close contact with the back surface of the frame portion, and the side portion of the resin film is: It is preferable to cover a boundary portion between the side surface of the transparent resin layer and the side surface of the frame portion and also cover a boundary portion between the side surface of the frame portion and the side surface of the base body portion.

According to the above configuration, the side portion of the resin film covering the boundary portion between the side surface of the transparent resin layer and the side surface of the frame portion restricts the solvent from reaching the boundary portion, and prevents the solvent from reaching the boundary portion. It regulates intrusion into the interface between the resin layer and the frame. The solvent is less likely to penetrate the interface than when the interface is not covered with the resin film. Therefore, the phenomenon that the interface between the transparent resin layer and the frame portion and the peripheral portion thereof is eroded by the solvent is unlikely to occur. As a result, the adhesion between the transparent resin layer and the frame is less likely to deteriorate.

In addition, the side portion of the resin film covering the boundary portion between the side surface of the frame portion and the side surface of the substrate main body portion restricts the solvent from reaching the boundary portion, and prevents the solvent from reaching the boundary portion. Regulates entry into the interface with the main body. The solvent is less likely to penetrate the interface than when the interface is not covered with the resin film. Therefore, the phenomenon in which the interface between the frame portion and the base body portion and the peripheral portion of the interface is eroded by the solvent is less likely to occur. As a result, the adhesion strength between the frame portion and the substrate main body portion is less likely to decrease.

In the vehicle decorative component described above, the side portion of the resin film is located on the side surface of the base body portion on the back side of the boundary portion between the side surface of the frame portion and the side surface of the base body portion. It is preferably welded.

According to the above configuration, the portion where the side portion of the resin film is welded to the side surface of the base body portion is the back side of the boundary portion between the side surface of the base body portion and the side surface of the frame portion. In the above-mentioned portion, there is no gap between the side portion of the resin film and the side surface of the base body portion, or the gap is smaller than in the case of no welding. Therefore, it becomes difficult for the solvent to enter between the side portion of the resin film and the side surface of the base body portion.

Therefore, the solvent becomes more difficult to reach the boundary portion between the side surface of the frame and the side surface of the base body, and is even less likely to enter the interface between the frame and the base body. In addition, the solvent becomes more difficult to reach the boundary portion between the side surface of the transparent resin layer and the side surface of the frame portion, and becomes more difficult to penetrate into the interface between the transparent resin layer and the frame portion.

According to the vehicle decorative component described above, it is possible to suppress deterioration in adhesion between the resin base material and the transparent resin layer due to infiltration of the solvent.

1 is a diagram showing an embodiment in which a vehicle decorative component is embodied in a vehicle emblem, and is a front view showing the emblem together with part of a front grill having a window. FIG. FIG. 2 is a partially enlarged cross-sectional view taken along line 2-2 of FIG. 1; 3(a) to 3(c) are partial cross-sectional views respectively showing intermediate molded bodies that are in the form of the emblem in FIG. 2 being manufactured. 4(a) and 4(b) are partial cross-sectional views respectively showing another form of the intermediate molded body of the emblem. 1 is a schematic cross-sectional view of an apparatus used when shaping a film material in one embodiment; FIG. 1 is a schematic partial cross-sectional view of an apparatus used in preshaping a film material in one embodiment; FIG. Fig. 7 is a schematic partial cross-sectional view showing a modification of the device of Fig. 6;

An embodiment in which a vehicle decorative component is embodied in a vehicle emblem will be described below with reference to FIGS. 1 to 5. FIG.
In the description below, the forward direction of the vehicle is defined as the front, and the backward direction is defined as the rear. The vertical direction means the vertical direction of the vehicle, and the horizontal direction is the width direction of the vehicle, which coincides with the horizontal direction when the vehicle moves forward. In addition, in each drawing, the scale of each part is appropriately changed in order to make each part of the emblem recognizable.

As shown in FIGS. 1 and 2, a millimeter wave radar device 13 for forward monitoring is arranged behind the front grille 11 at the central portion of the front portion of the vehicle 10 in the vehicle width direction. The millimeter-wave radar device 13 has a function of transmitting millimeter waves in electromagnetic waves toward the front outside the vehicle and receiving the millimeter waves reflected by objects outside the vehicle. Millimeter waves refer to radio waves having a wavelength of 1 mm to 10 mm and a frequency of 30 GHz to 300 GHz.

The thickness of the front grille 11 is not uniform, like a general front grille. Moreover, in the front grille 11, a metal plating layer may be formed on the surface of the base material made of resin. Therefore, the front grille 11 interferes with transmitted or reflected millimeter waves. For this reason, in the front grille 11, a window 12 is opened in front of the millimeter wave radar device 13 in the millimeter wave transmission direction.

An emblem 15 of this embodiment is arranged in the window portion 12 . Here, in describing the emblem 15, the design surface side (the upper side in FIG. 2) is called the front side, and the side opposite to the design surface (the lower side in FIG. 2) is called the back side.

The emblem 15 is arranged in an upright state so that the front surface (the design surface 52 ) faces the front of the vehicle 10 and the rear surface of the emblem 15 faces the rear of the vehicle 10 . In this arrangement state, the front side of the emblem 15 corresponds to the front side of the vehicle 10 , and the back side of the emblem 15 corresponds to the rear side of the vehicle 10 .

Therefore, in describing the single emblem 15, the terms "front" and "back" are used when specifying the direction corresponding to the longitudinal direction of the vehicle. The same is true when describing the emblem 15 attached to the vehicle 10 .

The emblem 15 includes a resin base material 21 , a transparent resin layer 33 , a decorative layer 41 , a resin film 45 and a hard coat layer 51 . Next, each part constituting the emblem 15 will be described.

<Resin base material 21>
The resin base material 21 is a member forming the back side of the emblem 15 . The resin base material 21 includes a base body portion 22 that constitutes a skeleton portion thereof, and an annular frame that is adjacent to the front side of the base body portion 22 and formed on the side portion of the base body portion 22 . a portion 31;

The base body portion 22 is made of AES (acrylonitrile-ethylene-styrene copolymer) resin and colored. A general portion 24 substantially orthogonal to the front-back direction and a protrusion 25 projecting from the general portion 24 to the front side are formed on the front side portion of the base body portion 22 . The general portion 24 corresponds to the background area 16 of the emblem 15 in FIG. 1, and the protrusion 25 corresponds to the pattern area 17 of the same emblem 15 . Here, the pattern area 17 is composed of a character portion 18 of "A" and an annular portion 19 therearound.

As shown in FIG. 2 , an annular recess 26 that is open on the front surface and recessed toward the back is formed on the side of the base material main body 22 . The annular recessed portion 26 is formed over the entire circumference of the base body portion 22 and has a substantially elliptical annular shape. The side surface 27 of the substrate main body 22 is gently inclined with respect to the front and back direction so that the dimension in the direction orthogonal to the front and back direction increases toward the front side. The back surface of the resin substrate 21 (substrate body portion 22) is gently curved so as to be recessed toward the front side (see FIG. 5).

In place of the AES resin, the base material main body 22 is composed of polymers of ASA (acrylonitrile-styrene-acrylate copolymer) resin, PC (polycarbonate) resin, PC resin and ABS (acrylonitrile-butadiene-styrene copolymer) resin. It may be formed by an alloy or the like.

The frame portion 31 is formed in a substantially elliptical annular shape by being formed over the entire circumference of the base body portion 22 (see FIG. 1). The back side portion of the frame portion 31 is formed (embedded) in a state of being filled in the annular concave portion 26 . The frame portion 31 is made of, for example, a mixed material of PC resin and carbon black, and has a black color. The side surface 32 of the frame portion 31 is gently inclined with respect to the front and back direction so that the dimension in the direction perpendicular to the front and back direction increases toward the front side. The side surface 32 is inclined at an angle that is the same as or close to that of the side surface 27 with respect to the front-back direction. The rear surface of the frame portion 31 is in close contact with the surface of the base body portion 22 .

Attachment portions (not shown) for attaching the emblem 15 to the front grille 11 or the vehicle body are provided at a plurality of locations on the side portion of the back surface of the base body portion 22 . The mounting portion is composed of a clip, a screw, an engaging claw, and the like.

<Transparent resin layer 33>
The transparent resin layer 33 is a transparent member that constitutes most of the front side of the emblem 15 , and is formed on the front side of the base body 22 and the frame 31 with PC resin. The term "transparency" as used herein includes not only colorless transparency but also colored transparency (colored transparency). This point also applies to the resin film 45, which will be described later. The back side portion (excluding the side portions) of the transparent resin layer 33 is formed in a shape corresponding to the shape of the front side portion of the substrate main body portion 22 . In other words, a general portion 34 is formed on the back side of the transparent resin layer 33 and on the front side of the general portion 24 of the substrate main body 22 so as to be substantially orthogonal to the front and back direction. A recessed portion 35 recessed toward the front side from the general portion 34 is formed at a portion on the back side of the transparent resin layer 33 and on the front side of the protrusion 25 of the base body portion 22 .

A surface 36 of the transparent resin layer 33 is gently curved so as to swell toward the front side corresponding to the back surface of the resin base material 21 (base material body portion 22) (see FIG. 5). A side portion of the transparent resin layer 33 protrudes outward (to the left in FIG. 2) from the frame portion 31 . The side portion of the transparent resin layer 33 has a side surface 37 on the front side and a side surface 38 on the back side. The front side surface 37 constitutes most of the entire side surface of the transparent resin layer 33 . The side surface 37 is inclined with respect to the front and back direction so that the dimension in the direction orthogonal to the front and back direction becomes smaller toward the front side. The rear side surface 38 is positioned between the front side surface 37 and the side surface 32 of the frame portion 31 . The side surface 38 is inclined with respect to the front and back direction so that the dimension in the direction orthogonal to the front and back direction increases toward the front side. The side surface 38 is inclined at an angle larger than that of the side surfaces 27 and 32, which is close to 90 degrees in this embodiment, with respect to the front and back directions. A step portion A is provided between the side surfaces 37 and 32 due to the presence of the side surface 38 .

The stepped portion A is formed based on the following design concept. That is, in this embodiment, the transparent resin layer 33 and the frame portion 31 are molded in this order by a resin molding method such as an injection molding method. On the other hand, the transparent resin layer 33 shrinks not a little after resin molding, as in the case where a general resin molding method is performed. When the transparent resin layer 33 is arranged as an insert member in the resin molding die during resin molding of the frame portion 31 , a gap is generated between the resin molding die and the side surface 37 of the transparent resin layer 33 .

If the stepped portion A were not provided, the molten resin, which is the material of the frame portion 31 , would flow into the gap and come out to the front side of the transparent resin layer 33 during resin molding of the frame portion 31 . put away. Therefore, by providing the step portion A as described above, the melted resin for molding the frame portion is suppressed from flowing out to the front side of the transparent resin layer 33 through the gap.

The transparent resin layer 33 is in close contact with the side portion of the back surface of the transparent resin layer 33 on the side portion of the surface of the resin base material 21 , which is the surface of the frame portion 31 in this embodiment. That is, the frame portion 31 is molded while being welded to the previously molded transparent resin layer 33 . Therefore, the frame portion 31 is formed in close contact with the transparent resin layer 33 .

The transparent resin layer 33 may be formed of a transparent resin such as PMMA (polymethyl methacrylate) resin instead of the PC resin.
<Decoration layer 41>
The decorative layer 41 is formed between the resin base material 21 and the transparent resin layer 33, in a region surrounded by the frame portion 31, and has millimeter wave permeability. In this embodiment, the decorative layer 41 is configured by a combination of a colored decorative layer 42 and a bright decorative layer 43 . The colored decorative layer 42 has dark colors such as black and blue, for example, and is formed on the back surface of the general portion 34 .

The bright decorative layer 43 is made of a metal material such as indium (In), and forms an island structure on the wall surface of the concave portion 35 of the transparent resin layer 33, part of the frame portion 31, and the entire rear surface of the colored decorative layer 42. is formed as The island structure is a structure in which the metal film is not continuous over one surface, and a large number of fine metal films are laid out in an island-like manner in a state that they are slightly separated from each other or are partially in contact with each other. By adopting this structure, the bright decorative layer 43 has a discontinuous structure, high electrical resistance, and millimeter wave transparency.

In the resin base material 21 and the transparent resin layer 33, a region through which millimeter waves are transmitted is formed so as to have a constant thickness.
<Resin film 45>
The resin film 45 includes a film substrate 46 and a bonding layer 47 formed on the back surface of the film substrate 46 . Depending on the compatibility of the bonding layer 47 with the film substrate 46, an adhesive layer or adhesive layer may be added between them. The film substrate 46 is made of a transparent resin material such as PC resin. The bonding layer 47 may be, for example, a film-like transparent optical adhesive sheet called OCA (OPTICAL CLEAR ADHESIVE), or a sheet that can be bonded to the transparent resin layer 33 in order to adhere to the transparent resin layer 33 during insert molding. Materials such as PMMA resin and ABS resin are used.

A main portion 48 of the resin film 45 is attached to the surface 36 of the transparent resin layer 33 with a bonding layer 47 . A portion of the resin film 45 surrounding the main portion 48 (hereinafter referred to as a side portion 49 ) wraps around the side surfaces of the resin base material 21 via the side surfaces 37 and 38 of the transparent resin layer 33 . The side surface of the resin base material 21 here means the side surface 32 of the frame portion 31 and the side surface 27 of the base material body portion 22 .

A side portion 49 of the resin film 45 is attached to the side surfaces 37 and 38 of the transparent resin layer 33 and the side surface of the resin base material 21 via a bonding layer 47 . The side portion 49 attached in this way covers the boundary portion B between the side surface 38 of the transparent resin layer 33 and the side surface 32 of the frame portion 31, and also the boundary between the side surface 32 and the side surface 27 of the base material body portion 22. Part C is covered.

Furthermore, the resin film 45 is welded to the side surface 27 of the base material body 22 on the back side of the boundary portion C. As shown in FIG.
<Hard coat layer 51>
The hard coat layer 51 is for preventing the emblem 15 from being scratched, is transparent, and has millimeter wave permeability. The hard coat layer 51 is formed by applying a known hard coat agent to the resin film 45 . Examples of hard coating agents include organic hard coating agents such as acrylate-based, oxetane-based, and silicone-based hard coating agents, inorganic hard coating agents, and organic-inorganic hybrid hard coating agents.

The hard coat layer 51 is positioned on the frontmost side of the emblem 15 . The surface of the hard coat layer 51 constitutes the design surface 52 of the emblem 15 .
As described above, the hard coat layer 51 covers and protects the resin film 45 to prevent the emblem 15 from being damaged. In addition, the hard coat layer 51 also has a function of suppressing deterioration and deterioration of the emblem 15 due to sunlight, wind and rain, temperature changes, and the like.

The emblem 15 is arranged in the window portion 12 in an upright state, and is attached to the front grille 11 or the vehicle body at the mounting portion.
Next, the operation of this embodiment configured as described above will be described together with the method of manufacturing the emblem 15. FIG.

When manufacturing the emblem 15, insert molding is first performed using a resin molding die to form an intermediate molded body 55 shown in FIG. 3(a). A film material 56 is prepared for this insert molding. The film material 56 is a material used for molding the resin film 45 and, like the resin film 45, has a multi-layer structure including a film substrate 46 and a bonding layer 47. As shown in FIG.

The film material 56 is arranged in a resin mold as an insert member. Next, a molten resin material (PC resin) is injected and filled into the cavity in the resin molding die. By curing the molten resin, the transparent resin layer 33 having the general portion 34 and the concave portion 35 is formed. Also, the film material 56 is formed into a predetermined shape while being attached to the transparent resin layer 33 .

As shown in FIG. 3A, the film material 56 in the obtained intermediate molded body 55 is roughly divided into the following three parts.
A first portion 57 that is substantially orthogonal to the front-back direction and laminated on the surface 36 of the transparent resin layer 33 .

• A second portion 58 which is positioned around the first portion 57 and has an annular shape and which bends with respect to the peripheral edge of the first portion 57 and extends to the rear side.
• a third portion 59 positioned around the second portion 58 and having an annular shape and bending relative to the periphery of the second portion 58 and extending outwardly (see FIG. 5);

In the intermediate molded body 55 , the first portion 57 of the film material 56 is attached to the surface 36 of the transparent resin layer 33 . A portion of the second portion 58 of the film material 56 is attached to the side surface 37 of the transparent resin layer 33 .

Subsequently, insert molding is performed using a resin molding die different from that described above, whereby an intermediate molded body 61 shown in FIG. 3(b) is molded. That is, the intermediate molded body 55 shown in FIG. 3A is arranged as an insert member in the resin mold. Next, a molten resin material (mixed material of PC resin and carbon black) is injected and filled into the cavity in the resin molding die. By curing the molten resin, the frame portion 31 is molded in close contact with the side portion of the back surface of the transparent resin layer 33 . In this manner, an intermediate molded body 61 shown in FIG. 3B, which is composed of the film material 56, the transparent resin layer 33 and the frame portion 31, is obtained.

Next, the intermediate molded body 61 is removed from the resin mold. As shown in FIG. 3C, the colored decorative layer 42 is formed by performing printing such as screen printing, hot stamping, or the like on the general portion 34 of the transparent resin layer 33 . Subsequently, a metal material such as indium is sputtered or vapor-deposited on the wall surfaces of the recesses 35 of the transparent resin layer 33 , part of the frame portion 31 , and the entire back surface of the colored decorative layer 42 to form the bright decorative layer 43 . is formed. In this way, the decorative layer 41 composed of the colored decorative layer 42 and the bright decorative layer 43 is formed on the back surface of the transparent resin layer 33 and part of the frame portion 31, as shown in FIG. 3(c). An intermediate compact 62 is obtained.

Next, insert molding is performed using a resin mold different from that described above to mold an intermediate molded body 63 shown in FIG. 4(a). That is, the intermediate molded body 62 shown in FIG. 3(c) is arranged as an insert member in the resin mold. Next, a molten resin material (AES resin) is injected and filled into the cavity in the resin molding die. By curing the molten resin, as shown in FIG. 4A, the base material main body 22 is formed in a state of being in close contact with the back surface of the frame 31 and the decorative layer 41 (bright decorative layer 43). , an intermediate compact 63 is obtained.

Subsequently, a portion of the second portion 58 and the third portion 59 of the film material 56 are formed along the side surface 38 of the transparent resin layer 33, the side surface 32 of the frame portion 31, and the side surface 27 of the base body portion 22. , and is attached to the side surfaces 38 , 32 , 27 at the bonding layer 47 .

A device 70 shown in FIG. 5 is used for the shaping and pasting. In addition, in FIG. 5, the intermediate compact 63 is illustrated in a simplified manner. This device 70 comprises a base 71 , a molded article receiving jig 72 and a film material receiving jig 75 .

A compact receiving jig 72 is arranged on the base 71 . A projection 72 a having a shape corresponding to the back surface of the intermediate molded body 63 is formed on the upper part of the molded body receiving jig 72 .
The film material receiving jig 75 has an annular shape and is arranged on the base portion 71 so as to surround the molded body receiving jig 72 . The film material receiving jig 75 has its upper surface as a mounting surface 76 on which the third portion 59 of the film material 56 is mounted. A spacer 77 for height adjustment is appropriately interposed between the film material receiving jig 75 and the base portion 71 .

When shaping the second portion 58 and the third portion 59 of the film material 56 , the intermediate molded body 63 is placed on the resin substrate 21 (substrate main body portion 22 ), and the projecting portion 72 a of the molded body receiving jig 72 . placed on top. The intermediate molded body 63 is supported from the back side by the molded body receiving jig 72 . The third portion 59 of the film material 56 is mounted on the mounting surface 76 of the film material receiving jig 75 .

By operating a vacuum suction mechanism (not shown), part of the second portion 58 and the third portion 59 of the film material 56 are sucked through the compact receiving jig 72 . As a result of this suction, as indicated by the two-dot chain line in FIG. The side surface 32 and the side surface 27 of the base material main body 22 are wound so as to be in close contact with each other, so that the shape is formed along the side surfaces 38 , 32 , 27 . The shaped portion of the film material 56 is attached to the side surfaces 38, 32, 27 of the bonding layer 47 (see FIG. 4(b)). In addition, shaping may be performed by pressurizing with compressed air (pressure molding).

In the apparatus 70, the vertical position (height) of the mounting surface 76 can be adjusted by increasing or decreasing the number of the spacers 77 or by changing the spacers 77 to different spacers having different thicknesses. It is possible to adjust the winding length of the material 56 .

Next, a surplus portion of the third portion 59 of the film material 56 that does not participate in attachment to the side surfaces 38, 32, 27 is cut (trimmed) by ultrasonic waves, a heat blade, laser, or the like. The resin film 45 is composed of the film material 56 that remains after the excess portion is removed.

Further, the resin film 45 is welded to the side surface 27 on the back side of the boundary portion C between the side surface 27 of the base body 22 and the side surface 32 of the frame portion 31 by ultrasonic welding. The boundary portion C is positioned on the back side of the boundary portion B between the side surface 38 of the transparent resin layer 33 and the side surface 32 . In this case, a portion of the side portion 49 of the resin film 45 that satisfies the above conditions is pressed toward the substrate body portion 22 by the ultrasonic horn. In this state, the ultrasonic horn is vibrated (ultrasonic vibration) at a frequency of 20 kHz or higher. This vibration is transmitted to the substrate main body 22 via the side portion 49, and frictional heat is generated between them. Due to this frictional heat, the side portion 49 and the base body portion 22 are melted as shown in FIG. 4(b). An intermediate molded body 64 is obtained in which the side portion 49 is welded to the base body portion 22 .

The trimming of the excess portion of the film material 56 may be performed at the same time as the welding.
Next, as indicated by the two-dot chain line in FIG. 4B, a hard coating agent is applied to the resin film 45 of the intermediate molded body 64 .

Here, on the side portion of the intermediate molded body 64, the boundary portion B between the side surface 38 of the transparent resin layer 33 and the side surface 32 of the frame portion 31 is positioned, and the side surface 32 and the side surface 27 of the base body portion 22 are located. A boundary portion C of is located.

If the hard coating agent is directly applied to the side surfaces 38, 32, 27, the solvent in the hard coating agent will directly adhere to the boundary portions B, C. The adhering solvent penetrates into the interface between the transparent resin layer 33 and the frame portion 31 from the boundary portion B, erodes the peripheral portion of the interface, or damages the boundary portion C between the frame portion 31 and the base body portion 22. There is a possibility that it may enter the interface and erode the peripheral portion of the interface.

In this regard, in this embodiment, the resin film 45 is coated with a hard coating agent. A hard coat layer 51 is formed on the surface and side surfaces of the resin film 45 by curing the applied hard coat agent.

The side portions 49 of the resin film 45 cover the boundary portions B and C when the hard coat layer 51 is formed. This side portion 49 restricts the solvent from directly adhering to the boundary portions B and C described above.

Since the direct adhesion of the solvent to the boundary portions B and C is restricted as described above, the penetration of the solvent from the boundary portion B into the interface between the transparent resin layer 33 and the frame portion 31 is restricted. In addition, penetration of the solvent from the boundary portion C into the interface between the frame portion 31 and the substrate main body portion 22 is also restricted.

These infiltration regulations suppress erosion of the interface between the transparent resin layer 33 and the frame portion 31 by the solvent. In addition, erosion of the interface between the frame portion 31 and the substrate main body portion 22 by the solvent is suppressed. The interface or the like means an interface and its peripheral portion. As a result, it is possible to suppress a decrease in adhesion between the back surface of the transparent resin layer 33 and the surface of the frame portion 31 . In addition, it is possible to suppress a decrease in adhesion between the back surface of the frame portion 31 and the surface of the base body portion 22 .

Furthermore, in the present embodiment, the side portion 49 of the resin film 45 is welded to the side surface 27 of the base body portion 22 on the back side of the boundary portions B and C. At the location where the side portion 49 is welded to the side surface 27, there is no gap between the side portion 49 and the side surface 27, or the gap is smaller than when the side portion 49 is not welded. Therefore, the side portion 49 prevents the solvent from entering between the side portion 49 and the side surface 27 .

Therefore, the solvent becomes more difficult to reach both the boundary portion C and the boundary portion B, and the interface between the transparent resin layer 33 and the frame portion 31 is not affected by the frame portion 31 and the base body portion 22 . It becomes even more difficult to penetrate into the interface of

Erosion by the solvent is further suppressed both at the interface between the frame portion 31 and the base body portion 22 and at the interface between the transparent resin layer 33 and the frame portion 31 . As a result, it is possible to further suppress a decrease in adhesion strength between the back surface of the frame portion 31 and the surface of the base body portion 22 and between the back surface of the transparent resin layer 33 and the surface of the frame portion 31 .

In this way, the desired emblem 15 shown in FIGS. 1 and 2 is obtained.
By the way, when the vehicle 10 to which the emblem 15 is attached is washed, the emblem 15 may be coated with detergent. In addition, various solvents may adhere to the side surfaces of the emblem 15 . In these cases as well, the same effect as in the formation of the hard coat layer 51 described above can be obtained.

That is, the side portion 49 of the resin film 45 covering the boundary portions B and C restricts the solvent from reaching the boundary portion C and from reaching the boundary portion B. As shown in FIG. Accordingly, the solvent is restricted from entering the interface between the frame portion 31 and the base body portion 22 from the boundary portion C, and from entering the interface between the transparent resin layer 33 and the frame portion 31 from the boundary portion B. It is possible to suppress the erosion by the solvent at the interface or the like. A decrease in adhesion between the back surface of the frame portion 31 and the surface of the base body portion 22 and a decrease in adhesion between the back surface of the transparent resin layer 33 and the surface of the frame portion 31 can be suppressed.

Moreover, when force is applied to the emblem 15 from the front side or the side, the force is received by the hard coat layer 51 . The hard coat layer 51 prevents the member on the back side of the hard coat layer 51 from being damaged by the force.

By the way, when millimeter waves are transmitted from the millimeter wave radar device 13 shown in FIG. The transmitted millimeter waves are reflected by objects in front of the vehicle, including preceding vehicles and pedestrians, and then transmit through the emblem 15 again and are received by the millimeter wave radar device 13 . Based on the transmitted and received millimeter waves, the millimeter wave radar device 13 recognizes an object, and detects the distance between the vehicle 10 and the same object, the relative speed, and the like.

Further, when the emblem 15 is irradiated with visible light from the front side of the vehicle 10 , the visible light passes through the hard coat layer 51 , the resin film 45 and the transparent resin layer 33 . The visible light is reflected or absorbed by the decorative layer 41 and the frame portion 31 . When the emblem 15 is viewed from the front of the vehicle 10, the decorative layer 41 and the frame portion 31 appear to be positioned on the back side (back side) of the hard coat layer 51, the resin film 45, and the transparent resin layer 33. As for the colored decorative layer 42 of the decorative layer 41, the color (black, blue, etc.) of the colored decorative layer 42 can be seen. The bright decorative layer 43 of the decorative layer 41 looks shiny like metal. That is, the character portion 18 and the annular portion 19 look like metal against a background of dark colors such as black and blue. Further, the black color due to the frame portion 31 can be seen on the outer side of the annular portion 19 in the radial direction. In this manner, the emblem 15 is decorated with the decorative layer 41 and the frame portion 31, and the appearance of the emblem 15 and its peripheral portion is improved.

The decorative layer 41 and the frame portion 31 are located on the front side of the millimeter wave radar device 13 and exhibit a function of covering the millimeter wave radar device 13 . Therefore, it is difficult to see the millimeter wave radar device 13 from the front side of the emblem 15 . Therefore, the appearance is improved as compared with the case where the millimeter wave radar device 13 can be seen through the emblem 15 .

According to this embodiment, the following effects are obtained in addition to the above.
・Since the side portion 49 of the resin film 45 is welded to the side surface 27 of the base body portion 22 and the space between the two is sealed, water generated by melting rain, ice, and snow cannot be used during car washing. It is possible to prevent water or the like from entering the gap between the side surface 27 of the base material main body 22 and the side portion 49 of the resin film 45, thereby enhancing waterproofness.

It should be noted that the above-described embodiment can also be implemented as a modified example in which this is changed as follows. The above embodiments and the following modifications can be combined with each other within a technically consistent range.

- In the above-described embodiment, the film material 56 is used as an insert member, and the intermediate molded body 55 in which the film material 56 is attached to the surface 36 and the side surface 37 of the transparent resin layer 33 is insert-molded. Along with this molding, the film material 56 is formed into a shape having the first portion 57 , the second portion 58 and the third portion 59 . After forming the frame portion 31, the decorative layer 41, and the substrate main body portion 22, the film material 56 is shaped along the side surface 38 of the transparent resin layer 33, the side surface 32 of the frame portion 31, and the side surface 27 of the substrate main portion 22. is shaped into

Instead of this, a portion of the emblem 15 excluding the resin film 45 (hereinafter referred to as an "intermediate molded body 78") is formed, and apart from the formation thereof, the film material 56 is formed on the first portion 57 and the second portion. 58 and a third portion 59 (hereinafter referred to as "pre-shaped").

FIG. 6 illustrates an apparatus 80 used for the preshaping. The molded body receiving jig 72 in this device 80 has a concave portion 72b on which the intermediate molded body 78 is placed. Further, the side surface 72 c of the molded body receiving jig 72 is positioned below the boundary portion between the side surface 37 and the side surface 38 of the transparent resin layer 33 . Other configurations of the device 80 are the same as those of the device 70 described above. Therefore, in the device 80, the same reference numerals are given to the same members as in the device 70, and detailed description thereof will be omitted.

When preforming the film material 56 , the intermediate molded body 78 is mounted in the concave portion 72 b of the molded body receiving jig 72 . A film material 56 is placed on the surface 36 of the transparent resin layer 33 and on the placement surface 76 of the film material receiving jig 75 .

Suction is performed using a vacuum suction mechanism (not shown). The portion of the film material 56 placed on the surface 36 is shaped into a shape along the surface 36 to form a first portion 57 . A portion of the film material 56 surrounding the first portion 57 is formed into a shape along the side surface 37 of the transparent resin layer 33 and the side surface 72c of the molded body receiving jig 72 to form a second film material. A portion 58 is formed. A portion of the film material 56 surrounding the second portion 58 is shaped along the shape of the placement surface 76 to form a third portion 59 .

7 may be used instead of the apparatus 80 shown in FIG. 6 to preform the film material 56 separately from the intermediate molded body 78. As shown in FIG.
In the apparatus 90, a film material receiving jig 91 that directly supports the film material 56 from the back side is used in place of the molded article receiving jig 72 described above. The film material receiving jig 91 has an external shape similar to the overall external shape of the molded body receiving jig 72 and the intermediate molded body 78 when the intermediate molded body 78 is mounted in the concave portion 72b of FIG. there is

When preforming the film material 56 , the film material 56 is placed on the film material receiving jig 91 and on the mounting surface 76 of the film material receiving jig 75 .
Suction is performed using a vacuum suction mechanism (not shown). The portion of the film material 56 placed on the film material receiving jig 91 is shaped along the surface 91a of the film material receiving jig 91 to form a first portion 57. be. A portion of the film material 56 surrounding the first portion 57 is formed into a shape along the side surface 91c of the film material receiving jig 91 to form a second portion 58 . A portion of the film material 56 surrounding the second portion 58 is shaped along the shape of the placement surface 76 to form a third portion 59 .

It should be noted that the film material 56 having the first portion 57, the second portion 58 and the third portion 59 formed by preforming using the apparatus 80 or the apparatus 90 is similar to the above embodiment. 5, and shaping is performed.

- As the bonding layer 47 in the resin film 45, a colored transparent material may be used. In this case, the decorative layer 41 can be seen through the binding layer 47 from the front of the vehicle 10, so the decorative layer 41 can be seen with the color of the binding layer 47 added. By changing the color of the bonding layer 47, it is possible to change the color of the decorative layer 41 that is visible through the bonding layer 47, thereby increasing variations in decoration.

- The side portion 49 of the resin film 45 may be welded to the base body portion 22 by other welding methods such as vibration welding and high frequency welding instead of ultrasonic welding.
- The frame part 31 may be omitted, and the resin base material 21 may be configured only by the base material body part 22 . However, in this case, the side portion 49 of the resin film 45 passes through the side surfaces 37 and 38 of the transparent resin layer 33 and wraps around to the side surface 27 of the substrate main body portion 22 to form the side surface 38 of the transparent resin layer 33 and the substrate. It covers the boundary portion between the side surface 27 of the material main body 22 and the side surface 27 .

Any vehicle decorative component that is incorporated in a vehicle equipped with a device that transmits and receives electromagnetic waves for detecting an object outside the vehicle can be used as the vehicle decorative component. In this case, electromagnetic waves transmitted and received by the device include electromagnetic waves such as infrared rays in addition to millimeter waves.

A device for transmitting and receiving electromagnetic waves for detecting an object outside the vehicle may be a device for rear monitoring, front side monitoring, or rear side monitoring, in addition to front monitoring. In this case, the vehicle decorative part is arranged in front of the device in the transmission direction of the electromagnetic waves.

- The vehicle decorative component may be a vehicle decorative component incorporated in a vehicle that is not equipped with a device for transmitting and receiving electromagnetic waves for detecting objects outside the vehicle.
- The above-mentioned vehicle decorative parts can be applied to vehicle exterior parts other than emblems, such as ornaments and marks, and can also be applied to vehicle interior parts.

DESCRIPTION OF SYMBOLS 10... Vehicle 11... Front grill (decorative part for vehicles)
DESCRIPTION OF SYMBOLS 21... Resin base material 22... Base-material main-body part 27,32,37,38... Side surface 31... Frame part 33... Transparent resin layer 36... Surface 45... Resin film 49... Side part 51... Hard coat layer B, C... Boundary part

Claims (4)

a resin base material;
a transparent resin layer that is formed on the front side of the resin base material and adheres closely to the side part of the surface of the resin base material on the side part of the back surface of the resin base material;
A vehicle decorative component comprising at least a transparent resin film laminated on the surface of the transparent resin layer,
The side portion of the resin film covers a boundary portion between the side surface of the transparent resin layer and the side surface of the resin base material. 2. The vehicle decorative component according to claim 1, wherein the resin film is formed with a transparent hard coat layer. The resin base includes a base body and an annular frame formed on the front side of the base body,
The resin base material is in close contact with the side portion of the back surface of the transparent resin layer on the surface of the frame portion,
The side portion of the surface of the base body portion is in close contact with the back surface of the frame portion,
The side portion of the resin film covers the boundary portion between the side surface of the transparent resin layer and the side surface of the frame portion, and also covers the boundary portion between the side surface of the frame portion and the side surface of the base body portion. The vehicle decorative part according to claim 1 or 2. 4. The side portion of the resin film is welded to the side surface of the base material body on the back side of the boundary portion between the side surface of the frame and the side surface of the base material body. A decorative part for a vehicle as described in .

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