JP2019209655A - Vehicle exterior and manufacturing method thereof - Google Patents

Abstract

To provide a roof trim having a lower member and an upper member having been vibration-welded to each other, capable of achieving both securement of appearance quality and securement of weld strength.SOLUTION: Disclosed herein is a manufacturing method of a roof trim 1 by vibration welding of a lower member 10 and an upper member 20 in a state of opposing to each other. The opposing face of the lower member 10 is provided with many welding ribs 30 extending parallel to each other. The vicinity parts 31 of both ends of the welding ribs 30 are tilted in a manner to reduce protrusion heights toward the ends, and the welding ribs 30 also at their both ends protrude from the lower member 10. By vibrating the lower member 10 toward the upper member 20 in the extending direction of the welding ribs 30 with the welding ribs 30 being pushed to the rear face 21a of the top face part of the upper member 20, the lower member 10 and the upper member 20 are welded to each other.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vehicle exterior product manufactured by joining a plurality of resin molded products by vibration welding and a manufacturing method thereof, for example, a roof spoiler for a vehicle in which an upper member and a lower member are integrated by vibration welding, and its It relates to a manufacturing method.

  As a technique for joining a plurality of resin molded products, there is vibration welding. In vibration welding, for example, resin molded products are overlapped with each other, and frictional heat is generated on the contact surfaces of the molded products by applying vertical pressing force and horizontal vibration force, thereby causing the molded products to adhere to each other. It is to be welded. Vibration welding has the advantage of reducing costs by reducing the number of work steps for bonding even for relatively large resin molded products, and also has the advantage of ensuring sufficient bonding strength. Widely used as a joining technique.

  In the following Patent Documents 1 and 2, a method of manufacturing a spoiler (vehicle exterior product) by vibration welding in a state where a lower member (first resin molded product) and an upper member (second resin molded product) face each other. Is disclosed. A plurality of welding ribs extending in parallel are formed on the opposing surface of the lower member. With the welding rib pressed against the opposing surface of the upper member, one of the upper member and the lower member is vibrated in the extending direction of the welding rib with respect to the other, thereby welding the lower member and the upper member.

  In the method disclosed in Patent Document 1, the welding rib has a certain protruding height. In the method disclosed in Patent Document 2, the welding rib is formed in a trapezoidal cross section, and the thickness of the upper member is set larger than the thickness of the lower member.

JP 2010-167855 A (FIGS. 4 and 7) JP 2001-260230 A (FIG. 7)

In the method described in Patent Document 1, the corners at both ends of the welding rib having a certain protruding height are strongly hit against the upper member facing each other during vibration welding. This is particularly noticeable when the variation in the dimensional accuracy of the upper member is large. For this reason, the melting temperature is raised and sink marks are generated on the surface of the upper member. As a result, the appearance of the product was deteriorated.
In the method described in Patent Document 2, although the occurrence of sink marks is suppressed by setting the thickness of the upper member to be larger than the thickness of the lower member, both ends of the welding ribs having a trapezoidal cross section cannot contribute to the welding. It was. Therefore, it has been difficult to ensure sufficient welding strength.

  In order to solve at least one of the above-mentioned problems, the present invention provides a method for manufacturing a vehicle exterior product by vibrating and welding a first resin molded product and a second resin molded product facing each other. A large number of welding ribs extending in parallel are formed on the opposing surface of the first resin molded product, and in the vicinity of both ends of these welding ribs, the protruding ribs are inclined so as to decrease toward the ends, and the welding ribs are Also at both ends, one of the first resin molded product and the second resin molded product is projected from the first resin molded product and the welding rib is pressed against the opposing surface of the second resin molded product. The first resin molded product and the second resin molded product are welded by oscillating the second resin molded product with respect to the other in the extending direction of the welding rib.

According to the above-described configuration, in the vicinity of both ends of the welding rib, the welding rib locally strikes the upper member strongly during vibration welding by inclining so that the protruding height is reduced toward the end. This can be avoided, and an excessive rise in the melting temperature can be avoided, thereby preventing inconveniences that cause sinks on the surface of the upper member.
Moreover, since the welding rib protrudes from the lower member at both ends, both ends of the welding rib can contribute to the welding, so that sufficient welding strength can be ensured.

Preferably, a pedestal portion that is wider than the welding rib and extends in the extending direction of the welding rib is formed on the facing surface of the first resin molded product, and the pedestal portion faces the second resin molded product. The welding rib is formed on the surface.
According to the said structure, when a lower member and an upper member are welded, since the opposing surface of a base part and the opposing surface of an upper member are faced | matched, welding strength can be raised.

  Preferably, in the method for manufacturing a vehicle exterior product as a roof spoiler, the first resin molded product is a lower member, the second resin molded product is an upper member, and the welding rib extends in the vehicle width direction. ing.

  According to another aspect of the present invention, in a lower member of a vehicle roof spoiler made of a resin molded product, a welding rib extending in the vehicle width direction is formed on an upper surface of the lower member of the roof spoiler made of a resin molded product. In the vicinity of both ends of these welding ribs, the protruding ribs are inclined so as to decrease toward the ends, and the welding ribs also protrude from the first resin molded product at both ends.

  According to the present invention, it is possible to ensure both the appearance quality and the welding strength in a vehicle exterior product.

It is a top view of the roof spoiler which concerns on one Embodiment of this invention. It is a top view of the lower member of the roof spoiler. It is sectional drawing of the roof spoiler along the III-III line of FIG. It is the principal part expansion perspective view which looked at the upper surface of the lower member from back. (A) It is a principal part expansion perspective view of the welding rib of the same lower member equivalent to the circle | round | yen VA of FIG. (B) It is a principal part enlarged plan view of the said lower member, Comprising: It is a figure which shows the edge part of the welding rib. It is a figure which shows typically the vibration welding process of the same upper member and the same lower member.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In this embodiment, the present invention is applied to an automobile roof spoiler and a manufacturing method thereof.
The roof spoiler 1 (vehicle exterior product) is intended to improve fuel efficiency and enhance decorative effects by its air rectifying action, and has a U-shape in plan view as shown in FIG. It has a symmetrical shape that is long in the width direction. As shown in FIG. 3, the roof spoiler 1 is attached to an upper end portion of a rear gate 2 that can be opened and closed behind the vehicle body of the automobile, and is arranged behind the roof 3 along the vehicle width direction of the roof 3. . The shape of the front inner side of the roof spoiler 1 corresponds to the shape of the rear end portion of the roof 3.

  The roof spoiler 1 includes a lower member 10 (first resin molded product) shown in FIGS. 2 and 3 and an upper member 20 (second resin molded product) shown in FIG. 1 assembled on the upper side of the lower member 10. Have. The lower member 10 and the upper member 20 are made of, for example, a synthetic resin material having thermoplasticity such as ABS resin or AES resin, and are integrally formed by injection molding or the like.

  The upper member 20 is a member that constitutes the design surface of the roof spoiler 1, and the appearance is emphasized. The upper member 20 includes a thin plate-like upper surface portion 21 that forms the upper surface of the roof spoiler 1, and a side surface portion 22 that is formed continuously with the upper surface portion 21. The side surface portion 22 constitutes the right side surface, left side surface, and rear side surface of the roof spoiler 1. The top surface 21 and the outer surface (surface) of the side surface portion 22 are design surfaces.

  The lower member 10 shown in FIGS. 2 and 3 is a member mounted on the rear gate 2 and is made stronger in strength than the upper member 20. As shown in FIG. 3, the lower member 10 includes an upper joint surface 11 (opposing surface of the first resin molded product) facing the back surface 21 a (opposing surface of the second resin molded product) of the upper surface portion 21 of the upper member 20. And a lower mounting portion 12 facing the outer panel 2a of the rear gate 2. The lower mounting portion 12 is fixed to the outer panel 2a by clips and bolts (not shown), and is opposed to the window glass 4 provided on the outer panel 2a via the buffer member 4a via the interference member 4b.

  As shown in FIGS. 2 and 3, a large number of welding ribs 30 extending in the vehicle width direction are provided in parallel on the upper joint surface 11. The lower member 10 is assembled to the upper member 20 by joining the upper joint surface 11 to the upper surface rear surface 21a of the upper member 20 by vibration welding.

The welding rib 30 will be described in detail. FIG. 4 is an enlarged perspective view showing the upper joint surface 11 of the lower member 10 as viewed from the rear. FIG. 5A is an enlarged perspective view showing the welding rib 30 of the lower member 10. FIG. 5B is an enlarged plan view showing the welding rib 30.
The upper joint surface 11 of the lower member 10 is provided with a pedestal portion 40 that protrudes toward the upper surface rear surface 21a of the upper member 20, and extends in the vehicle width direction. As shown in FIG. 4, a large number of pedestal portions 40 are provided in parallel. The top surface 41 of the pedestal portion 40 shown in FIG. 5 is opposed to the upper surface portion back surface 21a of the upper member 20, and the curved surface formed by the top surface 41 of each pedestal portion 40 corresponds to the shape of the opposed upper surface portion back surface 21a. doing. As a result, a curved surface corresponding to the upper surface rear surface 21a is formed by the plurality of top surfaces 41.

  The welding rib 30 is provided on the top surface 41 of the pedestal portion 40 and extends in the extending direction of the pedestal portion 40. As shown in FIGS. 3 and 5, the welding rib 30 is formed to be narrower than the top surface 41. As shown in FIGS. 4 and 5, in the vehicle width direction both ends vicinity 31 of the welding rib 30 is inclined so that the protruding height is reduced toward the end. The welding ribs 30 protrude slightly from the top surface 41 of the pedestal portion 40 by a height h at both ends in the vehicle width direction.

Next, with reference to FIG. 6, the manufacturing method of the roof spoiler 1 is demonstrated.
The vibration welding apparatus 50 for manufacturing the roof spoiler 1 by joining the lower member 10 and the upper member 20 has a lower jig 51 and an upper jig 52. In this vibration welding apparatus 50, the lower member 10 and the upper member 20 that are overlapped with each other are placed upside down when the roof spoiler 1 is mounted on the vehicle body, that is, with the surface facing upward when the vehicle body is mounted facing down. Mount on the jig 51.

  When the lower jig 51 is raised toward the upper jig 52 and pressed with a predetermined pressure, a pressure contact force is generated between the welding rib 30 of the lower member 10 and the upper surface rear surface 21a of the upper member 20. In this state, when the upper jig 52 is vibrated in the vehicle width direction, which is the extending direction of the welding rib 30, frictional heat is generated between the welding rib 30 and the upper surface portion back surface 21a, and the welding rib 30 is caused by this frictional heat. The top of the melts. When the melted portion is cooled, the lower member 10 and the upper member 20 are welded and joined together. Thereafter, the upper and lower jigs 51 and 52 are separated from each other, and the finished roof spoiler 1 is taken out.

  According to the roof spoiler 1 having the above-described configuration and the manufacturing method thereof, the vicinity 31 of the both ends of the welding rib 30 is inclined so that the protruding height is reduced toward the end. 30 does not hit the upper member 20 locally. For this reason, when vibration welding is performed with the welding ribs protruding at the same height, the corners at both ends of the welding ribs are strongly struck against the upper member and the melting temperature is increased, thereby preventing the problem of sink marks on the upper member surface. can do. In addition, since the welding rib 30 protrudes from the pedestal portion 40 at the both ends by the height h, all the inclined portions of the both-end vicinity portions 31 of the welding rib 30 can be welded.

  Furthermore, when the lower member 10 and the upper member 20 are welded and joined, the top surface 41 of the pedestal portion 40 and the upper surface portion rear surface 21a are abutted against each other, so that the welding strength can be increased.

In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the summary, various modifications can be employ | adopted.
The vehicle exterior product of the present invention is also applicable to vehicle spoilers other than roof spoilers and other vehicle exterior products.
In the above embodiment, the pedestal portion 40 is projected from the upper joint surface 11 of the lower member 10 and the welding rib 30 is projected from the pedestal portion 40. However, the welding rib is projected from the upper joint surface without providing the pedestal portion. You may let them.
In the above-described embodiment, the lower member is vibrated with respect to the upper member in vibration welding. However, the lower member and the upper member may be vibrated relatively, and the upper member may be vibrated with respect to the lower member. .
In the above embodiment, the vibration is welded in the vehicle width direction. However, the extending direction of the welding rib and the relative vibration direction of the lower member and the upper member may be matched.
In the above embodiment, in the vibration welding apparatus, the lower jig is raised to generate a pressure contact force between the lower member and the upper member. However, the upper and lower jigs need only be relatively close to each other, and the upper jig is lowered. You may let them.

  The present invention can be applied to a vehicle exterior product manufactured by joining a plurality of resin molded products by vibration welding and a manufacturing method thereof.

1 Roof spoiler (vehicle exterior)
10 Lower member (first resin molded product)
11 Upper joint surface (opposite surface of the first resin molded product)
20 Upper member (second resin molded product)
21a Upper surface rear surface (opposite surface of second resin molded product)
30 Welding ribs 31 Near both ends 40 Base part h Projection height

Claims (4)

In a method of manufacturing a vehicle exterior product by vibration welding in a state where the first resin molded product and the second resin molded product face each other,
A large number of welding ribs extending in parallel are formed on the opposing surface of the first resin molded product,
In the vicinity of both ends of these welding ribs, it is inclined so that the protruding height is reduced toward the ends, and the welding ribs also protrude from the first resin molded product at both ends,
With the welding rib pressed against the opposing surface of the second resin molded product, one of the first resin molded product and the second resin molded product is vibrated in the extending direction of the welding rib with respect to the other. By the above, the manufacturing method of the vehicle exterior product characterized by welding said 1st resin molded product and said 2nd resin molded product.   A pedestal portion that is wider than the welding rib and extends in the extending direction of the welding rib is formed on the facing surface of the first resin molded product. The method for manufacturing a vehicle exterior product according to claim 1, wherein welding ribs are formed. A method of manufacturing a vehicle exterior product as a roof spoiler,
The first resin molded product is a lower member, the second resin molded product is an upper member,
The method for manufacturing a vehicle exterior product according to claim 1, wherein the welding rib extends in a vehicle width direction. In the lower member of a vehicle roof spoiler made of a resin molded product,
Welding ribs extending in the vehicle width direction are formed on the upper surface of the roof spoiler made of a resin molded product and facing the upper member. In the vicinity of both ends of these welding ribs, the protruding height is reduced toward the ends. The vehicle roof spoiler lower member characterized in that the weld rib protrudes from the first resin molded product at both ends.

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