JP2017114353A - Resin molding for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive resin molding for a vehicle, which can sufficiently increase strength by a reinforcement rib.SOLUTION: A resin molding for a vehicle includes: a protruding wall 11, the outer surface of which is formed as a design surface; a side wall 12 and a frame wall 13, which are coupled to the protruding wall 11 and extended in a direction different from that of the protruding wall 11; and a reinforcement rib 15 that has a root part 15a in a ridge line part of a location for coupling inner surfaces of the protruding wall 11 and the side and frame walls 12 and 13, and within an extension range of thickness width of either or both of the protruding wall 11 and the side and frame walls 12 and 13.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a resin molded product for a vehicle attached to a vehicle body.

  For example, various types of resin molded products for vehicles have been proposed (see Patent Document 1). As an example, there is a vehicle resin molded product attached to both ends of the bumper in the vehicle width direction, and one conventional example is shown in FIG.

  This vehicle resin molded product 50 is an integrally molded product of injection molding. The vehicle resin molded product 50 has a design portion 60. The design part 60 has a plurality of continuous protruding walls 61. Due to the continuous protruding walls 61, the design portion 60, when viewed from the outside, has uneven shapes extending in the horizontal direction alternately arranged in the vertical direction. When the design portion 60 is viewed from the inside, similarly to the outside, the uneven shapes extending in the horizontal direction are alternately arranged in the vertical direction.

  On the inner surface side of the design portion 60, reinforcing ribs 65 are respectively provided in the vicinity of both left and right ends that are recessed by the protruding wall 61 when viewed from the inside.

  As shown in FIG. 7, a hole 66 is formed at the base portion 65 a of the reinforcing rib 65 and at a position corresponding to a portion that is conspicuous from the outside so as not to be connected to the protruding wall 61. As a result, so-called sink marks are prevented from being generated in the portion that is easily visible from the outside of the protruding wall 61 when the resin of the reinforcing rib 65 is formed.

Japanese Patent Laid-Open No. 2005-212231

  However, in the above-described conventional example, since the reinforcing rib 65 is only partially fixed to the protruding wall 61 by the hole 66, the strength cannot be sufficiently improved by the reinforcing rib 65.

  Further, in the injection molding, it is necessary to make the mold structure into a slide structure in order to form the hole 66 of the reinforcing rib 65, so that the cost becomes high.

  Therefore, the present invention has been made to solve the above-described problems, and an object thereof is to provide a low-cost vehicle resin molded product that can sufficiently increase the strength by the reinforcing rib. .

  The present invention includes a first wall surface portion whose outer surface is a design surface, a second wall surface portion connected to the first wall surface portion and extending in a direction different from the first wall surface portion, the first wall surface portion, and the A reinforcing rib having a root portion at a ridgeline portion of a connection portion of the inner surface with the second wall surface portion and within an extension range of the thickness width of either one or both of the first wall surface portion and the second wall surface portion. It is the resin molded product for vehicles characterized by having provided.

  According to the present invention, since the root portion of the reinforcing rib is located within the extension of the thickness width of the first wall surface portion and the second wall surface portion, so-called sink marks at the time of resin molding are the first wall surface portion and the second wall surface portion. Occurrence on the outer surface of the part can be prevented. Therefore, unlike the conventional example, it is not necessary to form a hole in the base portion of the reinforcing rib to prevent sink marks, and it is not necessary to make the mold structure into a slide structure. In addition, the cost is low.

1 shows an embodiment of the present invention and is a front view of a resin molded product for a vehicle. FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. It is the perspective view which showed one Embodiment of this invention and looked at the inner surface (back surface) side of the resin molded product for vehicles. 1A and 1B show an embodiment of the present invention, in which FIG. 2A is a cross-sectional view taken along line AA in FIG. 2, and FIG. FIG. 5 shows an embodiment of the present invention and is an enlarged view of part C of FIG. 4. It is an inner surface (back surface) figure of the resin molded product for vehicles of a prior art example. It is the DD sectional view taken on the line of FIG.

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

  1 to 5 show an embodiment of the present invention. As shown in FIGS. 1-4, the resin molded product 1 for vehicles is an integrally molded product of injection molding. A resin molded product 1 for a vehicle surrounds a reflector mounting portion 2 in which a plurality of windows 2 a are opened, a design portion 10 disposed below the reflector mounting portion 2, and an outer periphery of the reflector mounting portion 2 and the design portion 10. The flange part 3 and the some attachment part 4 for attaching to the vehicle body side (for example, bumper) are provided.

  The flange portion 3 is connected to the outer periphery of a frame wall 13 described below of the design portion 10 and protrudes toward the inner surface side. Each attachment portion 4 is erected along the mold drawing direction of the mold.

  The design portion 10 has an outer surface as a design surface. The design part 10 has a protruding wall 11 that is a plurality of continuous first wall surface parts. Each protruding wall 11 is formed so that the protruding amount on one side in the left-right direction is the largest and gradually decreases toward the other side. Each protruding wall 11 includes a top surface portion 11a, an inclined surface portion 11b extending from the top and bottom sides of the top surface portion 11a, and a base surface portion 11c extending from the base side of each inclined surface portion 11b when viewed from the outside. Each protruding wall 11 protrudes outward along the longitudinal direction, and a recess is formed on the inner surface side along the longitudinal direction. Therefore, when the design part 10 is seen from the outside, the uneven | corrugated shape extended in the horizontal direction is arrange | positioned alternately by the up-down direction. When viewed from the inside, the design portion 10 is different in position from the outside, but uneven shapes extending in the horizontal direction are alternately arranged in the vertical direction. Each protruding wall 11 is provided with a side wall 12 which is a second wall surface portion at one end which becomes a hollow space when viewed from the outside.

  A frame wall 13 is provided on the outer periphery so as to surround the plurality of protruding walls 11 and the plurality of side walls 12. The frame wall 13 has an outer surface at a position slightly protruding from the top surface portion 11a of the protruding wall 11 (a position protruding most from the outside).

  The design portion 10 is provided with reinforcing ribs 15 and 16 on both left and right ends thereof in a hollow space formed by the protruding walls 11 when viewed from the inside. The reinforcing rib 15 on one end side of the protruding wall 11 is formed lower than the base bottom surface portion 11c of the protruding wall 11 (a position that protrudes most when viewed from the inside). The reinforcing rib 16 on the other end side of the protruding wall 11 is formed at substantially the same height as the base bottom surface portion 11 c of the protruding wall 11.

  As shown in detail in FIG. 5, the root portion 15 a of each reinforcing rib 15 is the ridge line portion (the portion of the modeling character line) of the connecting portion between the top surface portion 11 a of the protruding wall 11 and the side wall 12, and the top of the protruding wall 11. One or both of the surface portion 11a and the side wall 12 are provided within the extension range of the thickness widths T1 and T2. In this embodiment, it is provided within the thickness T1 width of the top surface portion 11a of the protruding wall 11. 5 shows a portion where the root portion 15a of the reinforcing rib 15 is connected to the top surface portion 11a of the protruding wall 11, but the portion where the root portion 15a of the reinforcing rib 15 is connected to the inclined surface portion 11b of the protruding wall 11 is also shown. It is formed under the same conditions. Accordingly, since the base portion 15a of the reinforcing rib 15 is located within the range of the thickness widths T1 and T2 of the protruding wall 11 (book surface portion 11a and inclined surface portion 11b) and the side wall 12, so-called sink marks at the time of resin molding are the protruding wall 11 ( It can prevent generating on the outer surface of the book surface part 11a and the inclined surface part 11b) and the side wall 12.

  As described above, unlike the conventional example, it is not necessary to form a hole in the root portion 15a of the reinforcing rib 15 to prevent the occurrence of sink marks, and it is not necessary to make the mold structure into a slide structure. Can be sufficiently achieved, and the cost is low.

  In addition, as shown in FIG. 5, each reinforcing rib 15 has a direction in which at least one of the intersecting angles α2 and α3 between the projecting wall 11 and the inner surface of the side wall 12 is larger than the intersecting angle α1 between the projecting wall 11 and the outer surface of the side wall 12. Is erected along. Here, so-called sink marks at the time of resin molding may occur on any surface (regardless of the inner or outer surface) of the connecting portion of the protruding wall 11, the side wall 12, and the reinforcing rib 15. Since either one of the crossing angles α2 and α3 on both sides of the inner surface of the reinforcing rib 15 and the protruding wall 11 is larger than the crossing angle α1 of the outer surface of 12, the sink surface can be formed on the inner surface side. Cannot be on the (design side) side. In this embodiment, since the crossing angles are α1 <α2 and α1 <α3, if sink marks occur, they occur on the crossing inner surface at the crossing angle α2 or α3. In addition, when the intersection angle α2 is larger than the intersection angle α3, there is a high possibility that it occurs on the inner surface of the intersection at the intersection angle α2.

  Further, the direction in which the reinforcing rib 15 is erected may be a direction in which the crossing angles α2 and α3 of the connecting portion between the protruding wall 11 and the inner surface of the protruding wall 11 are larger than the crossing angle α1 of the connecting portion between the protruding surface 11 and the outer surface of the side wall 12. Therefore, the degree of freedom in the standing direction of the reinforcing rib 15 is high, and the degree of freedom in design is high. Thereby, it is also possible to easily match the standing direction of the reinforcing rib 15 with the mold drawing direction at the time of resin molding, and in this way, the thickness change from the root portion 15a of the reinforcing rib 15 to the tip portion can be reduced. It can be made as small as possible (it can only be a draft during resin molding). In the above-described embodiment, the standing direction of the reinforcing rib 15 is the drawing direction of the mold of the resin molded product (the standing direction of the mounting portion).

  The reinforcing rib 16 is also formed under the same conditions as the reinforcing rib 15 in terms of the position of the root portion 16a, the standing direction, and the like.

  In addition, in this embodiment, although applied to what the protruding wall 11 of the design part 10 was formed continuously, it cannot be overemphasized that the protruding wall 11 is applicable also to a single structure, and the cross-sectional shape of the protruding wall 11 It doesn't matter.

  In this embodiment, the case where the resin molded product for a vehicle is a component attached to a bumper is shown, but the present invention can be applied to any resin molded product attached to a vehicle.

DESCRIPTION OF SYMBOLS 1 Resin molded product for vehicles 10 Design part 11 Protruding wall (1st wall part)
12 Side wall (2nd wall part)
15, 16 Reinforcement ribs 15a, 16a Root portions of reinforcement ribs

Claims (3)

  A first wall surface portion whose outer surface is a design surface, a second wall surface portion connected to the first wall surface portion and extending in a direction different from the first wall surface portion, the first wall surface portion and the second wall surface portion. A reinforcing rib having a root portion is provided in the ridge line portion of the connecting portion of the inner surface and the extension range of the thickness width of either one or both of the first wall surface portion and the second wall surface portion. Characteristic resin molded product for vehicles. The resin molded product for vehicles according to claim 1,
The reinforcing rib is provided along a direction in which the intersection angle of the inner surface of the first wall surface portion or the second wall surface portion is larger than the intersection angle of the outer surface of the first wall surface portion and the second wall surface portion. Characteristic resin molded product for vehicles. The vehicle molded resin product according to claim 1 or 2,
The first wall surface portion is a protruding wall that protrudes outward along the longitudinal direction and has a recess formed on the inner surface side along the longitudinal direction, and the second wall surface portion is disposed on the outer periphery of the protruding wall. Resin molded product for vehicles characterized by being a frame wall.

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