JP2022188487A - Resin molded product for vehicle and method for manufacturing resin molded product for vehicle - Google Patents

Abstract

To provide a resin molded product for a vehicle and a method for manufacturing the resin molded product for a vehicle that can suppress an occurrence of cracks.SOLUTION: A resin molded product for a vehicle includes: a transparent first member (20) composed of a first resin material and having a design face part (21); and an opaque second member (40) composed of a second resin material. The second member (40) is a frame-shaped member laminated on a back face of the design face part (21) of the first member (20). The first member (20) has a first edge part (25) that rises from a back of the design face part (21) and covers a boundary part (30) between a first end face (42) and the design face part (21) inside a frame formed by the second member (40).SELECTED DRAWING: Figure 4

Description

TECHNICAL FIELD The present invention relates to a vehicle resin molded product and a method for manufacturing a vehicle resin molded product.

Patent Literature 1 discloses a vehicle rear module having a clear member and a colored member.

WO2019/181944

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle resin molded product that can suppress the occurrence of cracks, and a method for manufacturing the vehicle resin molded product.

A vehicle resin molded product according to one aspect of the present invention includes:
Having a transparent first member made of a first resin material and having a design surface, and an opaque second member made of a second resin material,
The second member is a frame-shaped member laminated on the back surface of the design surface portion of the first member,
The first member has a first edging portion that protrudes from the back surface of the design surface portion and covers a boundary portion between the design surface portion and a first end surface inside the frame formed by the second member.

According to the resin molded product for a vehicle, the first member protrudes from the back surface of the design surface portion to cover the boundary portion between the design surface portion and the first end surface inside the frame formed by the second member. By having it, it is possible to suppress accumulation of a solvent used for surface treatment or the like in the boundary portion, and it is possible to suppress the generation of cracks in the boundary portion.

A method for manufacturing a resin molded article for a vehicle according to one aspect of the present invention includes:
A transparent first member made of a first resin material and having a design surface, and an opaque second member made of a second resin material, wherein the second member has the design of the first member. A method for manufacturing a resin molded product for a vehicle, which is a frame-shaped member laminated on the back surface of the face portion,
A stacking step of injecting the second resin material into the cavity containing the first member and stacking the second member in a frame shape on the peripheral edge of the first member;
a trimming step of trimming an intermediate molded product including the first member and the second member molded in the lamination step;
including
In the lamination step,
the first member housed in the cavity has a protruding portion that protrudes outward from the peripheral portion;
The first member is accommodated in the cavity such that the projecting portion is arranged at a position where an injection port for the second resin material exists,
injecting the second resin material into the cavity through a gate extending from the injection port toward the peripheral edge of the first member;
In the trimming step,
The intermediate molded product is trimmed so that at least a portion of the second end face outside the frame formed by the second member and the end face of the peripheral portion of the first member are flush with each other.

According to the method for manufacturing a resin molded product for a vehicle, the occurrence of cracks at the interface between the first member and the second member can be suppressed.

ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the resin molding for vehicles and the manufacturing method of the resin molding for vehicles which can suppress generation|occurrence|production of a crack can be provided.

It is a perspective view showing the rear portion of the vehicle according to the embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the structure of the back door for vehicles which concerns on embodiment. 1 is a front view of a vehicle rear module with an overhang according to an embodiment; FIG. 4 is a cross-sectional view taken along the line A-A' in FIG. 3; FIG. It is a figure which shows one aspect|mode of a 1st border part. It is an expansion schematic diagram of opening part vicinity of a 2nd member. It is a figure which shows one aspect|mode of the structure with which a 2nd member is provided. FIG. 4 is a schematic diagram showing one aspect of manufacturing a vehicle rear module with an overhang. It is a schematic diagram which shows the 2nd end surface outside the frame which the 2nd member which concerns on another embodiment comprises, and a 1st member.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. For convenience of explanation, the dimensions of each member shown in the drawings may differ from the actual dimensions of each member.

Further, in the description of the present embodiment, for convenience of description, the terms “horizontal direction”, “front-rear direction”, and “vertical direction” will be referred to as appropriate. These directions are relative directions set for the vehicle 1 shown in FIG. Here, the "vertical direction" is a direction including the "upward direction" and the "downward direction". "Fore-and-aft direction" is a direction that includes "forward direction" and "rearward direction." A "left-right direction" is a direction including a "left direction" and a "right direction."

First, a vehicle back door 3 according to a first embodiment will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a perspective view showing a rear portion of a hatchback type vehicle 1 having a vehicle back door 3. FIG. FIG. 2 is a schematic diagram showing the configuration of the vehicle back door 3. As shown in FIG. The vehicle back door 3 is attached to the rear part of the vehicle 1 so as to open and close the opening 2 provided in the rear part of the vehicle 1 . The vehicle back door 3 includes a vehicle rear module 4 (an example of a vehicle resin molding) and a back door inner 5 provided inside the vehicle 1 relative to the vehicle rear module 4 .

The vehicle rear module 4 is sized to cover the rear opening 2 of the vehicle 1 (FIG. 2). The vehicle rear module 4 has a first member 20 and a second member 40 .
The first member 20 is a colorless transparent or colored transparent member. The first member 20 has a design surface portion 21 that is visible when the vehicle 1 is viewed from behind the vehicle 1 . The first member 20 integrally has a ramp portion 22 and a window portion 24 . Both the lamp portion 22 and the window portion 24 are portions that transmit light.
The second member 40 is an opaque member having a lower light transmittance than the first member 20 . The second member 40 is colored so as to visually shield at least part of the interior of the vehicle 1 from the outside.
The first member 20 is made of a first resin material. The second member 40 is made of a second resin material. The first resin material and the second resin material are mainly composed of polycarbonate (PC), acrylic resin (PMMA), cycloolefin resin, polystyrene resin, etc., and optionally contain additives such as fillers and coloring agents.

The back door inner 5 is made of a material obtained by kneading a resin such as polypropylene with glass fiber or the like. However, the material forming the back door inner 5 is not limited to a specific resin, and may be metal, for example. The back door inner 5 is formed along the entire outer circumference of the vehicle rear module 4, and is provided with an inner opening 52 corresponding to the lamp portion 22 and the window portion 24 (FIG. 2).

The vehicle back door 3 is formed by bonding the back door inner 5 to the vehicle rear module 4 with an adhesive. The manner of attachment of the vehicle rear module 4 to the back door inner 5 is not limited to the use of an adhesive, and a structure such as a rib or a boss may be formed on the vehicle rear module 4 to attach the back door inner 5. 5 may be attached. The vehicle back door 3 is attached to the rear portion of the vehicle via a hinge (not shown) provided on the back door inner 5 .

A pair of left and right rear combination lamps (not shown) are arranged at positions in the front direction of the lamp portion 22 of the first member 20 of the vehicle rear module 4 . The lamp part 22 in this embodiment transmits light from a stop lamp of a rear combination lamp, a turn signal lamp, or the like. The rear combination lamp may be mounted directly on the vehicle rear module 4 or may be mounted on the back door inner 5 so as to be supported by both the vehicle rear module 4 and the back door inner 5. may be installed in Alternatively, a rear combination lamp may be provided on the vehicle body so that the rear combination lamp is covered with the lamp portion 22 of the first member 20 of the vehicle rear module 4 .

Next, the vehicle rear module 4 according to this embodiment will be described in detail. FIG. 3 is a front view of a vehicle rear module (hereinafter referred to as a vehicle rear module 400 with an overhang) immediately after being molded by the manufacturing method of this embodiment, which will be described later. FIG. 4 is a cross-sectional view taken along line A-A' in FIG.

The projecting portion-equipped vehicle rear module 400 includes an projecting portion 410 extending in one of the vertical and horizontal directions of the vehicle rear module 4 (FIGS. 3 and 4). An injection gate mark 420 is formed on the overhanging portion 410 . The vehicle rear module 4 is formed by removing the projecting portion 410 by trimming or the like. The overhanging vehicle rear module 400 is formed by two-color molding the first member 20 and the second member 40 . For convenience of explanation, the same reference numerals are assigned to the first member 20 and the second member 40 of the vehicle rear module 400 and the vehicle rear module 4, and the same members will be described.

The first member 20 monolithically includes a window portion 24 and a ramp portion 22 as previously described, and may also include a spoiler portion 26 (FIG. 3).
The window portion 24 is gently curved from the center portion of the first member 20 in the left-right direction toward the left-right direction.
A pair of ramp portions 22 are formed at left and right positions of the first member 20, and are configured to protrude rearward from the main curved surface of the first member 20 (FIG. 1). A portion of the left-right direction end portion of the first member 20 (substantially central portion in the vertical direction) extends substantially in the front-rear direction of the vehicle 1 and forms a side portion of the ramp portion 22 (FIG. 1). . It is preferable that the thickness of the first member 20 in the lamp portion 22 is formed thin so that the light of the lamp can be sufficiently transmitted.
The spoiler portion 26 is formed in the upper portion of the first member 20 so as to extend in the left-right direction, and is configured to protrude rearward from the main curved surface of the first member 20 (see FIGS. 3 and 4). ). The spoiler portion 26 is formed so as to curve downward as it extends in the left-right direction from the center portion in the left-right direction when the window portion 24 is viewed from above (FIG. 3).

The second member 40 is a frame-shaped member laminated on the back surface of the design surface portion 21 of the first member 20 (FIGS. 3 and 4). The second member 40 is laminated on the peripheral portion 23 of the first member 20 . The second member 40 is also provided on the rear surface of the spoiler portion 26 of the first member 20 (the surface in the front direction of the vehicle 1). The second member 40 has an opening 41 inside which the first member 20 is filled, in a part of the frame that the second member 40 itself constitutes. The opening 41 is provided in the upper part of the frame formed by the second member 40, and is configured so that the light from the high mount stop lamp is emitted in the rear direction of the vehicle 1 through the first member 20. there is The opening 41 of the second member is provided below the spoiler portion 26 of the first member.

The first member 20 has a first edging portion 25 rising from the back surface of the design surface portion 21 (FIG. 4). The first edging portion 25 covers the boundary portion 30 between the first end surface 42 inside the frame formed by the second member 40 and the design surface portion 21 of the first member 20 . The boundary portion 30 is a portion located at the rear end of the first end surface 42 . In this embodiment, the first edging portion 25 covers the entire first end surface 42 . Although a partial cross section is illustrated in FIG. 4, the first edging portion 25 is provided so as to cover the entire first end surface 42 inside the frame. 4, a portion of the surface of the first border portion 25 is flush with the surface of the frame formed by the second member 40. However, as shown in FIG. It may be a mode in which it is immediately inclined from .

In the overhanging vehicle rear module 400 , the second end surface 44 outside the frame formed by the second member 40 and the end surface 23 a of the peripheral edge portion 23 of the first member 20 are flush with each other except for the overhanging portion 410 . is configured to be In the vehicle rear module 4 formed by removing the projecting portion 410 by trimming or the like, even in the removed portion of the projecting portion 410, the second end face 44 outside the frame formed by the second member 40 and the first member The end face 23a of the peripheral edge portion 23 of 20 is flush with the end face 23a (see FIG. 4). Note that the second end surface 44 outside the frame formed by the second member 40 may be covered with the first member 20 except for the projecting portion 410, as in a mode described later.

The second member 40 has a second edging portion 45 edging the opening 41 . The second fringing portion 45 is part of the frame formed by the second member 40 and positioned around the opening 41 . The second border portion 45 is a frame surrounding the opening portion 41 . Here, the width of the second fringing portion 45 will be described with reference to FIG. FIG. 6 is an enlarged schematic view of the vicinity of the opening 41 viewed from the rear. In the second member 40 of the vehicle rear module 400 with an overhanging portion according to the embodiment, the width w of the second edging portion 45 positioned below the opening 41 is smaller than that of the other portions. The minimum width w of the second border portion 45 is preferably 10 mm or more. As a result, appearance defects such as sink marks can be prevented from occurring at this portion. The open surface 27 of the first member 20 in the opening 41 and the surface of the second border portion 45 are flush with each other (FIG. 4).

The second member 40 of the vehicle rear module 4 may include structures such as bosses for fastening to the back door inner 5 and ribs for positioning. FIG. 7 is a diagram showing one aspect of the structure 47 included in the second member 40. As shown in FIG. Here, a substantially columnar structure 47 will be described. When the structure 47 is provided in the vehicle rear module 4, the diameter t of the root portion of the structure 47 and the laminated thickness T of the first member 20 and the second member 40 at the portion where the structure 47 is provided are A relationship of T/t≧1.0 is preferable. With such a configuration, occurrence of appearance defects such as sink marks can be suppressed. It is more preferable to provide the structure 47 so as to satisfy the relationship T/t≧1.5. Note that the structure 47 may be flat.
In addition, by applying a hard coating to the surface of the first member 20 to prevent damage, it is possible to fill recesses due to slight sink marks. .

Next, a method for manufacturing the vehicle rear module 4 according to the present embodiment (an example of a method for manufacturing a resin molded product for a vehicle) will be described. As a basic aspect of the present embodiment, a method using a so-called facing type two-color molding die disclosed in International Publication No. 2019/181944 (Patent Document 1) is appropriately referred to. A mold having a cavity corresponding to the above-described overhanging vehicle rear module 400 is used to manufacture the overhanging vehicle rear module 400 . Then, the vehicle rear module 4 is manufactured by removing the projecting portion 410 from the vehicle rear module 400 with the projecting portion.

In the method for manufacturing the vehicle rear module 400 with an overhang portion according to the embodiment, the second resin material is injected into the cavity in which the first member 20 is accommodated, and the second member 40 is formed on the peripheral edge portion 23 of the first member 20 . including a stacking step of stacking in a frame shape. The method for manufacturing the vehicle rear module 4 according to the embodiment includes, in addition to the lamination step, trimming of the overhang-equipped vehicle rear module 400 including the first member 20 and the second member 40 formed in the lamination step. Including process.

In the stacking step, the first member 20 accommodated in the cavity has an overhanging portion 410 that overhangs the peripheral edge portion 23 (see FIGS. 3 and 4). The first member 20 is accommodated in the cavity so that the protruding portion 410 is arranged at the position where the injection port of the second resin material exists (see FIGS. 3 and 4). Then, the second resin material is injected into the cavity through a gate extending from the injection port toward the peripheral edge portion 23 of the first member 20 . The cavity is configured such that the second end surface 44 outside the frame formed by the second member 40 and the end surface 23a of the peripheral edge portion 23 of the first member 20 are flush with each other except for the projecting portion 410. may By using the cavity configured in this manner, the second end surface 44 outside the frame formed by the second member 40 and the end surface 23 a of the peripheral edge portion 23 of the first member 20 are flush with each other except for the projecting portion 410 . The overhanging vehicle rear module 400 configured to be is manufactured.

Subsequently, in a trimming step, the second end surface 44 outside the frame formed by the second member 40 and the end surface 23a of the peripheral edge portion 23 of the first member 20 are at least partially flush with each other. The vehicle rear module 400 is trimmed. Specifically, the overhanging portion 410 of the overhanging vehicle rear module 400 is trimmed so that the second end surface 44 and the end surface 23a are flush with each other in the portion where the overhanging portion 410 was located.

Further, in the mold used in the manufacturing method, the gate is arranged such that the opening width in the direction orthogonal to the back surface of the design surface portion 21 of the first member 20 increases from the injection port toward the peripheral edge portion 23 of the first member 20. is configured. As a result, it is possible to manufacture the vehicle rear module 400 including the portion 440 in which the thickness of the second member 40 gradually increases from the injection gate mark 420 toward the peripheral edge portion 23 of the first member 20 (FIG. 4). ).

In the example shown in FIG. 4, a portion 440 in which the thickness gradually increases is included in the portion outward from the trimming line TL2 (the portion to be trimmed and removed), and the portion inward from the trimming line (the portion left after trimming) is included. portion) does not include the gradually increasing thickness portion 440 . On the other hand, the end of the second member 40 connected to the second end surface 44 outside the frame formed by the second member 40 (the portion remaining after being trimmed) has a portion whose thickness gradually decreases toward the second end surface 44. The shape of the cavity may be changed and trimming lines may be adjusted to include.

In addition, in the mold used in the manufacturing method, the opening width in the direction parallel to the back surface of the design surface portion 21 of the first member 20 increases from the injection port toward the peripheral edge portion 23 of the first member 20. is configured. As a result, it is possible to manufacture the vehicle rear module 400 with an overhang portion including the portion 430 whose width gradually increases as the second member 40 moves from the injection gate mark 420 toward the peripheral edge portion 23 of the first member 20 (FIG. 3). ). A portion 430 of the second member 40 whose width gradually increases toward the peripheral edge portion 23 of the first member 20 is trimmed and removed along the trimming line TL1 (broken line shown in FIG. 3).

Here, one aspect of the method for manufacturing the vehicle rear module 400 with an overhang portion will be described with reference to FIG. 8 . FIG. 8 shows a mode of manufacturing the second member 40 having the opening 41 . In the mode shown in FIG. 8 , the open surface 27 of the first member 20 is brought into contact with the mold 50 when the first member 20 is housed in the cavity and the mold is clamped. Then, with the open surface 27 in contact with the mold 50 , the second resin material is introduced into the cavity in which the first member 20 is accommodated to stack the second member 40 . Thereby, the residual stress acting on the first member 20 filling the opening 41 of the second member 40 can be reduced.

(action/effect)
In the vehicle resin molded product (vehicle rear module 4) in the above-described embodiment, the first member 20 rises from the back surface of the design surface portion 21, and the first end surface 42 inside the frame formed by the second member 40 and the design surface 42 form the design surface. It has a first edging portion 25 covering a boundary portion 30 with the face portion 21 (FIG. 4). As a result, it is possible to suppress accumulation of a solvent used for surface treatment or the like in the boundary portion 30, and it is possible to suppress the generation of cracks in the boundary portion 30. FIG.

Further, in the above-described embodiment, in the resin molded product (vehicle rear module 4) in which the frame-shaped second member 40 is laminated on the back surface of the design surface portion 21 of the first member 20, the frame formed by the second member 40 is The inner first end surface 42 is covered by the raised first rim 25 of the first member 20 (FIG. 4). As a result, the solvent used for surface treatment or the like is less likely to accumulate at the interface between the first member 20 and the second member 40, and the occurrence of cracks at the interface between the first member 20 and the second member 40 can be further suppressed.

In the above-described embodiment, in the resin molded product (vehicle rear module 4) in which the frame-shaped second member 40 is laminated on the peripheral edge portion 23 of the first member 20, the outside of the frame formed by the second member 40 is The second end surface 44 and the end surface 23a of the peripheral edge portion 23 of the first member 20 are flush with each other (FIG. 4). As a result, it becomes more difficult for the solvent used for surface treatment or the like to accumulate at the interface between the first member 20 and the second member 40, and the occurrence of cracks at the interface between the first member and the second member can be further suppressed. However, the second end face 44 outside the frame formed by the second member 40 may be covered with the first member 20 except for the projecting portion 410, as in a mode described later. At least a part of the second end surface 44 outside the frame formed by the second member 40 and the end surface 23a of the peripheral edge portion of the first member 20 may be flush with each other.

In the above-described embodiment, in the resin molded product (vehicle rear module 4) in which the frame-shaped second member 40 is laminated on the peripheral edge portion 23 of the first member 20, the outside of the frame formed by the second member 40 is The end of the second member 40 connected to the second end surface 44 may include a portion 440 whose thickness gradually decreases toward the second end surface 44 (FIG. 4). In this case, stress concentration due to mold shrinkage at the interface between the first member 20 and the second member 40 can be suppressed, compared to the case where the portion is stepped. It is possible to suppress the occurrence of cracks at the interface.

Further, in the above-described embodiment, in the resin molded product (vehicle rear module 4) in which the first member 20 is filled in the opening 41 provided in a part of the frame-shaped second member 40, the opening 41 is edged. The minimum width w of the second edging portion 45 of the second member 40 to follow is 10 mm or more (FIG. 6). As a result, the filling amount of the second resin material during molding can be increased, the occurrence of sink marks can be suppressed, the residual stress at the interface between the first member 20 and the second member 40 can be reduced, and the first member 20 and the second member can be reduced. The occurrence of cracks at the interface with 40 can be suppressed.

Further, in the above-described embodiment, in the resin molded product (vehicle rear module 4 ) in which the first member 20 is filled in the opening 41 provided in a part of the frame-shaped second member 40 , the opening 41 in the opening 41 The open surface 27 of the first member 20 and the surface of the second edging portion 45 of the second member 40 edging the opening 41 are flush with each other (FIG. 4). As a result, the solvent used for surface treatment or the like is less likely to accumulate at the interface between the first member 20 and the second member 40, and the occurrence of cracks at the interface between the first member 20 and the second member 40 can be suppressed.

Further, the manufacturing method of the above-described embodiment is a lamination step of injecting the second resin material into the cavity in which the first member 20 is accommodated and laminating the second member 40 in a frame shape on the peripheral edge portion 23 of the first member 20. and the second end surface 44 outside the frame formed by the second member 40 and the end surface 23a of the peripheral edge portion 23 of the first member 20 are at least partially flush with each other. and a trimming step of trimming 400 . As a result, it is possible to manufacture an intermediate molded product (vehicle rear module 400 with an overhang portion) in which a solvent used for surface treatment or the like is less likely to accumulate at the interface between the first member 20 and the second member 40. The occurrence of cracks at the interface with the two members 40 can be suppressed.

Further, in the manufacturing method of the above embodiment, in the step of injecting the second resin material into the cavity in which the first member 20 is accommodated and stacking the second member 40 on the peripheral edge portion 23 of the first member 20 in a frame shape, , The gate through which the second resin material is injected into the cavity is configured such that the width of the opening in the direction orthogonal to the back surface of the design surface portion 21 of the first member 20 increases from the injection port toward the peripheral edge portion 23. It is As a result, stress concentration due to mold shrinkage at the interface between the first member 20 and the second member 40 can be suppressed, and the occurrence of cracks at the interface between the first member 20 and the second member 40 can be further suppressed.

Although the embodiments of the present invention have been described above, it goes without saying that the technical scope of the present invention should not be limitedly interpreted by the description of the embodiments. It should be understood by those skilled in the art that this embodiment is merely an example, and that various modifications of the embodiment are possible within the scope of the invention described in the claims. The technical scope of the present invention should be determined based on the scope of the invention described in the claims and their equivalents.

In the above embodiment, the vehicle rear module 4 has been described as an example of a vehicle resin molded product. In addition to this, resin molded products that constitute vehicle lamps, resin molded products that constitute vehicle sensor units, and the like. can be applied as various parts of

Further, in the above-described embodiment, the mode in which the vehicle rear module 4 is formed by integrating the first member 20 and the second member 40 by two-color molding has been described. Alternatively, for example, the vehicle rear module 4 may be formed by molding the first member 20 and the second member 40 separately and bonding them with an adhesive or by welding them together. Alternatively, the vehicular rear module 4 may be formed by fitting the first member 20 and the second member 40 with ribs or the like provided on the first member 20 and the second member 40 . However, two-color molding is preferable because the bonding between the first member 20 and the second member 40 becomes strong and the vehicle rear module 4 can be molded in a continuous process.

In the above embodiment, the vehicle rear module 4 having the lamp portion 22 that transmits the light of the rear combination lamp has been described. It may be configured to transmit light from lamps, turn signal lamps, back lamps, tail lamps, rear fog lamps, daytime lamps, and the like. Further, it may be configured to transmit light from a rear combination lamp composed of any combination of these lamps.

Moreover, members such as lamps, cleaners, wipers, sensors, and defoggers may be mounted on the vehicle rear module 4 in the above embodiment. As the lamp, for example, the one described above can be mounted. Examples of sensors include LiDAR, cameras, radars, and the like. In this case, if the thickness of the sensor mounting portion such as LiDAR or radar is reduced, the transmittance increases and the sensitivity of the sensor increases.

In the above embodiment, the second end surface 44 outside the frame formed by the second member 40 and the end surface 23a of the peripheral edge portion 23 of the first member 20 are flush with each other except for the projecting portion 410. Although a configured lug vehicular rear module 400 has been described, the present disclosure is not limited to this aspect. FIG. 9 is a schematic diagram showing the first member 20 and the second end surface 44 outside the frame formed by the second member 40 according to another embodiment. As shown in FIG. 9( a ) or FIG. 9( b ), the second end surface 44 outside the frame formed by the second member 40 may be covered with the first member 20 . Note that the portion including the projecting portion 410 is excluded from the portion where the second end surface 44 is covered with the first member 20 . Further, when trimming the portion where the second end face 44 is covered with the first member 20 , only the portion of the first member 20 may be trimmed.

1: vehicle, 2: opening, 3: back door for vehicle, 4: rear module for vehicle, 5: back door inner, 20: first member, 21: design surface portion, 22: ramp portion, 23: peripheral edge portion, 23a : end surface 24: window portion 25: first edging portion 26: spoiler portion 27: open surface 30: boundary portion 40: second member 41: opening portion 42: first end surface 44: third 2 end faces, 45: second edge portion, 47: structure, 50: mold, 52: inner opening, 400: rear module for vehicle with projecting portion, 410: projecting portion, 420: trace of injection gate

Claims (8)

Having a transparent first member made of a first resin material and having a design surface, and an opaque second member made of a second resin material,
The second member is a frame-shaped member laminated on the back surface of the design surface portion of the first member,
The first member has a first edging portion that rises from the back surface of the design surface portion and covers a boundary portion between the design surface portion and a first end surface inside the frame formed by the second member,
Resin molded products for vehicles. The first edging portion rises from the back surface of the design surface portion so as to cover the first end surface.
The resin molded article for vehicles according to claim 1. The second member is laminated on the peripheral edge of the first member,
3. The vehicle resin molding according to claim 1, wherein a second end face outside the frame formed by the second member and an end face of the peripheral portion of the first member are at least partially flush with each other. product. The second member is laminated on the peripheral edge of the first member,
Claims 1 to 3, wherein the end portion of the second member connected to the second end face outside the frame formed by the second member includes a portion whose thickness gradually decreases toward the second end face. The resin molded product for vehicles according to any one of the items. The second member has an opening in which the first member is filled in a part of the frame that itself constitutes,
The second member has a second edging portion edging the opening,
The minimum width of the second border is 10 mm or more,
The resin molded product for vehicles according to any one of claims 1 to 4. The second member has an opening in which the first member is filled in a part of the frame that itself constitutes,
The second member has a second edging portion edging the opening,
The open surface of the first member in the opening and the surface of the second border are flush with each other,
The resin molded product for vehicles according to any one of claims 1 to 5. A transparent first member made of a first resin material and having a design surface, and an opaque second member made of a second resin material, wherein the second member has the design of the first member. A method for manufacturing a resin molded product for a vehicle, which is a frame-shaped member laminated on the back surface of the face portion,
A stacking step of injecting the second resin material into the cavity containing the first member and stacking the second member in a frame shape on the peripheral edge of the first member;
a trimming step of trimming an intermediate molded product including the first member and the second member molded in the lamination step;
including
In the lamination step,
the first member housed in the cavity has a protruding portion that protrudes outward from the peripheral portion;
The first member is accommodated in the cavity such that the projecting portion is arranged at a position where an injection port for the second resin material exists,
injecting the second resin material into the cavity through a gate extending from the injection port toward the peripheral edge of the first member;
In the trimming step,
trimming the intermediate molded product so that a second end surface outside the frame formed by the second member and an end surface of the peripheral edge portion of the first member are at least partially flush with each other;
A method for manufacturing a resin molded article for a vehicle. The gate is configured such that the width of the opening in the direction orthogonal to the back surface of the design surface portion of the first member increases from the injection port toward the peripheral edge portion.
The method for producing a resin molded article for a vehicle according to claim 7.

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