JP2002079891A - Side molding for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a side molding causing no reduction in joining strength of both members even if the reverse side of a molding end member is thinly worked for saving material in the side molding by joining a molding body and the molding end member having a different construction material in an end part. SOLUTION: In this side molding 14 composed of the long size molding body 10 and the short size molding end member 12 and relieving a shock and improving design by being installed on a body side surface of a vehicle by integrating both members by adhering the opening end 24 of the molding end member to the opening end 18 of the molding body, the reverse side of the molding end member is thinly molded in a degree of not impairing rigidity, and an opening end shape in the molding end member is adjusted to an opening end shape in the molding body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side molding for a vehicle, and more particularly, when the molding main body and the molding terminal member are joined at the ends, the back side of the molding terminal member is thinned to save material. However, the present invention relates to a side molding that does not reduce the joining strength between the two members.

[0002]

2. Description of the Related Art There is a side molding as one of exterior parts for vehicles. This side molding is a long band-shaped part that is attached to the side of the body of the vehicle. It absorbs slight external shocks to prevent damage to the body, and tightens the side view of the body to improve design. And the like. The molding attached to the lower part of the side surface of the vehicle body is referred to as a "side garnish". However, since this does not fall into a large side molding, the term "side molding" is used in this specification.

[0003] Side molding was previously manufactured by co-extrusion of polyvinyl chloride (PVC) and metal.
In recent years, with the increasing needs for recyclability and weight reduction, polypropylene (PP), thermoplastic polyolefin
It is common to extrude various synthetic resins such as (TPO), thermoplastic polyurethane (TPU) and other glass fiber reinforced urethane (GFRU). However, a long side molding made of an extruded product has a constant cross section, so that when the molding is mounted on the vehicle body, the terminal portion of the molding does not interfere with the door when opening and closing, and the external appearance of the terminal portion is prevented. It is necessary to appropriately mold the shape to improve the quality.

Therefore, as shown in FIG. 3, a long molding body 1 made of a resin such as polyvinyl chloride (PVC) is used.
0 and a short molding terminal member 12 made of the same kind of material (PVC) are end-joined to form a single side molding 14 which is practically used. This mall terminal member 12 is formed as shown in FIG.
As shown in (1), the open end is processed to draw a gentle curve in the plane, and as shown in (2) of FIG.
On the side surface, a taper process that tapers toward the terminal is performed. Of course, the shape applied to the mall terminal member 12 is variously different depending on the part of the vehicle body to which the side molding 14 is mounted, the type of the vehicle, and the like.

In manufacturing the above-described side molding 14, an injection mold 16 shown in FIG. 5 is used. That is, the long molding body 10 made of polyvinyl chloride (PVC) extruded in a separate step has an open end 18 cut at 90 °, and a resin adhesive is applied to the end surface. Then, the molding body 10 is inserted from the side of the open end 18 to the middle of the cavity 16 a in the injection mold 16. Next, the nozzle 2 of the injection molding machine (not shown)
Then, the molten resin of polyvinyl chloride (PVC) is forcibly injected into the cavity 16 a through the nozzle 20. As a result, the molding terminal member 12 is formed in the cavity 16a of the injection mold 16 and is restricted to a required shape by the internal contour of the cavity 16a. The molding end member 12 is bonded to the open end 18 of the molding main body 10 facing the cavity 16a via the adhesive, and then the injection molding die 16 is removed to form the two-piece molding shown in FIG. A side molding 14 having a structure is obtained.

[0006]

In the two-piece side molding 14 described above, the back side of the molding terminal member 12 is formed to be thin in order to save resin material used for injection molding. I have. That is, as shown in FIG. 6, the back side is made thinner (to the extent that rigidity is not impaired) so that the thickness of the molding terminal member 12 is reduced as much as possible, thereby reducing the material cost. However, in this case, the cross-sectional area of the open end 24 of the molding terminal member 12 is correspondingly reduced as the thickness of the member 12 is reduced. Therefore, when the molding terminal member 12 is joined to the open end 18 of the molding main body 10, as shown in FIG. 1, the joining surface of the two members 10, 12 via the adhesive becomes the open end 24 (molding) having the reduced cross-sectional area. However, there is a problem that sufficient joint strength cannot be secured. Specifically, for example, when handling a side molding having a two-piece structure with a length of about 70 cm, if the side of the molding terminal is shaken while holding the portion of the molding terminal member by hand, peeling may occur from the joint portion thereof Was confirmed.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problem suitably, and it is possible to save material in a side molding formed by joining end portions of a molding body and molding terminal members made of different materials. Therefore, an object of the present invention is to provide a side molding that does not reduce the joining strength of both members even if the back side of the molding terminal member is processed to be thin.

[0008]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and achieve the intended object, the present invention comprises a long molding body and a short molding terminal member. In a vehicle side molding, the opening ends of the molding terminal members are bonded to each other to unify the members, and the molding terminal is attached to a side surface of a vehicle body to reduce impact and improve design. The back side of the member is formed in a thin shape that does not impair the rigidity, and the shape of the open end of the molding terminal member is made to match the shape of the open end of the molding body.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a vehicle side molding according to the present invention will be described with reference to the accompanying drawings by way of preferred embodiments. In addition, about the member which is the same as that demonstrated in the above-mentioned drawing, or equivalent, it designates with the same code | symbol and abbreviate | omits detailed description.

FIG. 1 is a side view of a side molding 14 according to a preferred embodiment.
FIG. 2 is an explanatory view showing the state separated from No. 2; In the figure, the molding body 10 is, for example, polyvinyl chloride (PVC).
The material is extruded in a separate step using a material as a material, and an open end 24 of the molding terminal member 12 described later is joined to the open end 18 thereof. The molding end member 12 is obtained by injecting a molten resin of the same material as the polyvinyl chloride (PVC) into an injection mold. Although FIG. 1 shows that the separately formed molding terminal member 12 is present independently, it is for convenience of explanation, and actually, as described later with reference to FIG. It is joined to the molding body 10 simultaneously with molding.

The molding end member 12 is formed so as to be thin so that its rigidity is not impaired on the back side, thereby saving the aforementioned resin material. The shape of the open end 24 of the molding terminal member 12 matches the shape of the open end 18 of the molding body 10 as shown in FIG. Specifically, the open end 24 additionally has a wall portion 24 a vertically raised from a thin portion on the back surface of the molding terminal member 12, and the shape of the wall portion 24 a corresponds to the open end 18 of the molding body 10. It complements the shape. That is, if the section of the thinned portion of the molding terminal member 12 is 24b, the open end 2
4 = wall 24a + thin section 24b. As described above, as a result of matching the shape of the open end 24 of the molding terminal member 12 with the shape of the open end 18 of the molding body 10 to be joined, the molding terminal member 12 is thinned on the back surface side. Even if there is, the joint area with the molding main body 10 can be secured to the maximum, so that both members 1
The joint strength of 0.12 is not reduced.

FIG. 2 is a sectional view of an injection mold 26 for manufacturing the side molding 14 having a two-piece structure according to the embodiment. The injection mold 26 has an upper mold 28 and a lower mold 3 that can be freely opened and closed.
The lower die 30 has a thick portion 30a as shown in the figure. As a result, the cavity 26a defined inside the injection mold 26 when the mold is clamped.
Is set smaller than the inner volume of the cavity 16a in the injection mold 16 shown in FIG. The cavity 26a of the injection mold 26 is formed by the molding end member 12 of the side molding 14 according to the present embodiment.
Is to regulate the shape.

As shown in FIG. 2A, prior to injection molding, the upper mold 28 and the lower mold 30 of the injection mold 26 are opened, and the molding body 10 extruded in a separate step is fixed to the lower mold 30 by a predetermined method. Place in position. At this time, the position is adjusted in advance so as to secure a required gap G between the open end 18 of the molding body 10 and the thick portion 30a of the lower mold 30. A required resin adhesive is applied to the entire open end 18 of the molding body 10. Next, (2) in FIG.
As shown in the figure, the upper die 28 and the lower die 30 are clamped to fix the molding body 10 from above and below. And in FIG.
As shown in (3), the nozzle 20 of the injection molding machine is brought into contact with the sprue 22 of the injection molding die 26,
(PVC) molten resin of the same material as the cavity 26a
When the molding is forcibly injected, the molding end member 12 regulated by the inner contour of the cavity 26a is formed. That is, the molding end member 12 is formed such that the back side of the member 12 is formed thin by the thick portion 30a of the lower mold 30, and the gap G is filled with the molten resin. The wall portion 24a is formed at the end.

As described above, since the open end 24 of the molding terminal member 12 is the sum of the thin section 24b and the wall portion 24a as described above, the molding terminal member 12 and the molding body 10 via an adhesive are interposed therebetween. The joint area between the two members 10 and 12 is kept to a maximum, and therefore the joining strength between the two members 10 and 12 does not decrease. Actually, a side molding 14 of a two-piece structure having a length of about 70 cm was manufactured, and the side of the molding body 10 was shaken while holding the molding terminal member 12 by hand.
There was no peeling or falling off from the joint.

[0015]

As described above, according to the vehicle side molding according to the present invention, when the molding main body and the molding terminal member are joined at the end portions to form a single side molding,
Even if the back side of the molding end member is processed to be thin in order to save material, the joint strength of the two members does not decrease because the shape of each open end is matched so that the joining strength does not decrease. Is played.

[Brief description of the drawings]

FIG. 1 is a perspective view of a side molding according to a preferred embodiment as viewed from the back side with a molding main body and a molding terminal member being separated.

FIG. 2 is a side molding 14 having a two-piece structure according to the embodiment.
FIG. 2 is a cross-sectional view of an injection mold that manufactures a mold, wherein (1) shows a state in which an upper mold and a lower mold are opened and a molding body is placed;
(2) shows a state in which the upper and lower dies are clamped to fix the molding body, and (3) shows a state in which molten resin is injected into the cavity to form the molding terminal member and joined to the molding body. ing.

FIG. 3 is a perspective view of a side molding in which a long molding main body and a short molding terminal member are joined at their ends.

FIG. 4A is a plan view of a molding terminal member having a curved shape, and FIG. 4B is a side view of the molding terminal member that has been subjected to a taper process.

FIG. 5 is a longitudinal sectional view of an injection molding die used for manufacturing a side molding in which a molding main body and a molding terminal member are joined at end portions.

FIG. 6 is a perspective view showing the back side of a molding terminal member formed thin.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Mall main body 12 Mall terminal member 14 Side molding 18 Open end (of mall main body) 24 Open end (of mall terminal member)

Claims (2)

[Claims] An open end of the molding body (10) comprising a long molding body (10) and a short molding terminal member (12).
By bonding the open end (24) of the molding terminal member (12) to (18), the two members (10, 12) are united and attached to the side of the body of the vehicle to reduce impact and improve design. In the vehicle side molding (14), the rear side of the molding terminal member (12) is formed to be thin so as not to lose the rigidity, and the open end (24) of the molding terminal member (12) is formed. ) Is adapted to match the shape of the open end (18) of the molding body (10). 2. An open end of the molding terminal member (12).
(24) additionally has a wall portion (24a) raised from a thin portion on the back surface of the molding terminal member (12), and this wall portion (24
The side molding for a vehicle according to claim 1, wherein the shape of (a) complements the shape of the open end (18) of the molding body (10).