JPH05338504A - Molding for vehicle and its manufacture - Google Patents

Abstract

PURPOSE:To prevent end parts of a molding from being wrinkled and distorted, and also prevent a rigidity of the end parts of the molding from lowering. CONSTITUTION:A molding for vehicle is integrally provided with a molding body part 2 of which cross-section is formed roughly in C-shape with back flanges 3 made by folding both sides of a flat band plate material in lateral direction to a back side and molding end parts 4 formed continuously at both ends of the molding body part 2 in longitudinal direction. The molding end part 4 is provided with an end wall part 5 drawn to block the end of the molding body part 2 in longitudinal direction and end flanges 6 folded with the top end of the end wall part 5 and the back flanges 3 of the molding body part 2 flushed with each other, and formed roughly in cap shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle molding and a manufacturing method thereof.

[0002]

2. Description of the Related Art Conventionally, a vehicle molding is mainly composed of a total of three parts, that is, a molding main body that forms a molding body and end caps that are assembled to both ends of the molding main body in the longitudinal direction to form molding end portions. It was common to be done. In such a vehicle molding, it is necessary to separately form the molding body and the end cap and then assemble them, resulting in high manufacturing and assembly costs. Moreover, the joint between the molding body and the end cap impairs the appearance.

Therefore, for example, Japanese Unexamined Patent Publication No. 26704/1990.
As disclosed in Japanese Unexamined Patent Publication No. No. 0-0,096, the back flange at the longitudinal end of the molding body is cut off, and then the end is bent, so that the molding is continued to the longitudinal end of the molding body. A terminal unit is known.

[0004]

By the way, in the above-mentioned conventional apparatus, when the molding end portion is formed by bending continuously with the longitudinal end portion of the molding body portion, the bending is performed while pressing the end portion of the molding end portion. Therefore, wrinkles and distortion due to excess meat may occur in the mall terminal portion, particularly in the terminal corner portion, and the appearance may be impaired. Further, in the molding terminal portion, the rear flange is cut off, which causes a problem that rigidity is reduced.

In view of the above-mentioned conventional problems, an object of the present invention is to prevent the occurrence of wrinkles and distortion in the molding terminal portion and prevent the molding terminal portion from being deteriorated in rigidity, and a vehicle molding. It is an object of the present invention to provide a manufacturing method capable of easily manufacturing the vehicle molding.

[0006]

In order to achieve the above-mentioned object, the invention of claim 1 of the present invention has a substantially C-shaped cross section with a back flange having both sides in the width direction of the flat strip plate folded back to the back side. There is a molding for a vehicle integrally provided with a formed molding body and a molding terminal portion continuously formed at a longitudinal end portion of the molding body portion, wherein the molding terminal portion is the molding body portion. An end wall portion that is drawn so as to close the end in the longitudinal direction, and an end edge flange in which the tip end portion of the end wall portion is folded back in the same plane as the back surface flange of the molding body portion. It is formed in a substantially bag shape.

Further, according to a second aspect of the present invention, a molding body portion having a substantially C-shaped cross section with a back flange on both sides in the width direction of the flat strip-shaped plate material is folded back to the back side, and the molding body portion. A method for manufacturing a vehicle molding integrally provided with a molding terminal portion continuously formed at a longitudinal end of the flat belt-shaped plate material in a width direction on both sides in a cross section with a back flange folded back to the back side. A molding material forming step of forming a molding material including the molding body by cutting a substantially C-shaped long material into a dimension longer than the molding body by a predetermined length; An end part expanding step of expanding the back flange in a part extended from the end part of the part corresponding to the molding body part to expand the end part of the molding material, and a wrinkle pressing margin on the peripheral part of the expansion part of the molding material. As A drawing step of forming an end wall part that closes the end part of the molding body part by drawing the expansion part, and cutting the wrinkle pressing margin generated in the drawing step, and then the tip part of the end wall part By bending to form an edge flange that is flush with the back flange of the molding body, a molding bag-shaped molding end portion is formed by the end wall portion and the edge flange. And a bending step of continuously forming the end portion of the.

[0008]

In the vehicle molding according to claim 1 configured as described above, an end wall portion of the molding end portion formed continuously with a longitudinal end portion of the molding body portion is drawn, and the end wall portion is drawn. Since the end edge flange of the front end of the portion forms the same plane as the back surface flange of the molding body and is folded back, generation of wrinkles and distortion on the molding end is prevented. Furthermore, since the molding terminal portion is formed in a bag shape by the end wall portion and the edge flange, the rigidity of the molding terminal portion is not reduced.

In the method for manufacturing a vehicle molding according to a second aspect, the vehicle molding is manufactured through a molding material forming step, an end portion expanding step, a drawing step and a bending step in this order. In particular, in the drawing process, since the end wall portion is formed by drawing while expanding the developed portion of the end portion of the molding material while wrinkle-pressing it, the occurrence of wrinkles and distortion on the end wall portion can be reliably prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 and 4, a molding 1 for a vehicle includes a molding body 2 having a substantially C-shaped cross section with a back flange 3 in which both widthwise sides of a flat strip plate are folded back to the back side, and the molding body 2. 2 is integrally provided with molding terminal portions 4 continuously formed at both ends in the longitudinal direction.

As shown in FIG. 2, the molding 1 includes a metal cored bar 12 as an inner layer, an intermediate resin layer 13 having flexibility and bonded to the surface of the cored bar 12, and the resin layer 13. It has a three-layer structure with the outer coating layer 14 made of a resin film that is joined to the surface and has a decorative property.

[0012] The mall terminal portion 4 is the mall body portion 2.
Of the end wall portion 5 that is drawn so as to close the end portion in the longitudinal direction, and the edge flange 6 that is folded back so that the end portion of the end wall portion 5 is flush with the back surface flange 3 of the molding body portion 2. And has a substantially bag shape.

This embodiment is constructed as described above.
Therefore, in the molding end portion 4 continuously formed at both longitudinal ends of the molding body portion 2, the end wall portion 5 is drawn, and the end edge flange 6 at the tip of the end wall portion 5 is formed. Since it is folded back on the same surface as the back surface flange 3 of the part 2, the molding terminal part 4 does not have wrinkles or distortion due to excess meat and has a beautiful appearance.

Further, since the molding terminal portion 4 is formed in a bag shape by the end wall portion 5 and the end edge flange 6, the rigidity is not lowered and the terminal strength is sufficiently secured. Also,
The vehicle molding 1 of this embodiment is attached to a side portion of a vehicle body or a door as a side protector molding as shown in FIG.

Next, the method of manufacturing the vehicle molding of this embodiment will be described in the order of steps. (Molding Material Forming Step) First, as shown in FIG. 6, a flat strip-shaped plate material having a three-layer structure of a metal cored bar 12, an intermediate resin layer 13 and a coating layer 14 is formed into a substantially C-shaped cross section by roll forming. Bend. Then, by cutting a long material having a substantially C-shaped cross section into a dimension longer than the molding body 2 by a predetermined length, the molding material 2 including the molding body 2
1 is formed.

(End Extension Process) Next, as shown in FIGS. 6 to 7, the ends (extension) of the molding material 21 extended from both ends of the molding material 21 corresponding to the molding body 2. (Part), the rear surface flange 3 is expanded and developed with the end of the molding material 21. That is, in this embodiment, in the vicinity of the boundary between the extended portion of the molding material 21 and the molding body 2, a substantially gate shape is formed as shown in FIG. 10, and the radius of curvature is gradually increased from that portion toward the tip. Then, as shown in FIG. 9, the expanded portion 22 is formed in a substantially arc shape.

(Drawing Step) The molding material 21 having the developed portion 22 formed at the end as described above is set on the lower die 32 of the drawing press die apparatus 31 as shown in FIGS. 11 to 13. Here, the upper mold 37 in the raised position is lowered toward the lower mold 32. With the lowering of the upper mold 37, first,
The peripheral edge portion of the expanding portion 22 of the molding material 21 is clamped by the wrinkle holding body 33 of the lower die 32 and the holding body 38 of the upper die 37 which faces the wrinkle holding body 33.

With the subsequent lowering of the upper die 37, the expanding portion 22 of the molding material 21 is drawn into the shape of the punch 34 of the lower die 32. Then, as shown in FIGS. 14 to 16, the upper die 37 descends to the bottom dead center, whereby the molding material 21
The expanded portion 22 of is molded so as to close the end portion of the molding body portion 2, and the end wall portion 5 is formed thereby.

Further, as shown in FIG. 16, the molding body 2 of the molding material 21 is held between the movable pressing mold 39 of the upper mold 37 and the lower mold body 35 without being drawn. After that, the upper die 42 is raised to the original position, and the drawn molding material 21 is taken out from the lower die 32.

In this way, the peripheral edge portion of the expansion portion 22 of the molding material 21 is used as the wrinkle pressing margin 23, and the expansion portion 22 is drawn into the shape of the punch 34 to form the end wall portion 5. It is possible to prevent wrinkles and distortion due to excess meat on the wall portion 5. In addition, in the drawing process, as shown in FIG.
As shown in FIG. 7 and FIG. 18, the wrinkle pressing margin 23 generated at the tip edge of the end wall portion 5 of the molding material 21 is cut off.

(Bending Step) The molding material 21 from which the wrinkle pressing margin 23 has been cut off is set on the lower die 42 of the bending press die apparatus 41 as shown in FIGS.

Here, the upper die 47 in the raised position is the lower die 4
It is descended toward 2. As the upper die 47 descends, the passive cam 4 of the lower die 42 is moved by the actuating cam 48 of the upper die 47.
3 is advanced. The passive cam 43 is made of material 2
After contacting the tip of the end wall 5 of No. 1, the tip of the end wall 5 of the molding material 21 is clamped by the passive cam 43 and the slide body 44 of the lower mold 42.

Subsequently, as shown in FIG. 21, the upper die 47 is lowered to the bottom dead center, and the passive cam 43 is moved by the operating cam 48.
Is advanced to the advancing end, the end portion of the end wall portion 5 of the molding material 21 is bent into the shape of the corner receiving die 45 of the lower die 42, whereby the tip portion of the end wall portion 5 of the molding material 21 is bent. An edge flange 6 that is flush with the back surface flange 3 of the molding body 2 is formed on this. Then, a substantially bag-shaped molding end portion 4 is formed continuously by the end wall portion 5 and the edge flange 6 at the end portion of the molding body portion 2 to form a vehicle molding 1 '.

Further, the molding body 2 is held between the movable pressing die 49 of the upper die 47 and the lower die body 36 without being bent.

Thereafter, the upper die 47 is raised to the original position, and the passive cam 43 of the lower die 42 is retracted to the original position by the elastic body 43a. Further, the corner receiving mold 45 is retracted with respect to the lower mold body 46 while being reduced to a position where it is pulled out from the bag of the molding terminal portion 4, and the bent vehicle molding 1 ′ is taken out from the lower mold 42. It

In this way, the tip end of the end wall portion 5 of the molding material 21 is used as the wrinkle pressing margin 24, and the tip end portion of the end wall portion 5 is bent into the shape of the corner receiving die 45 to form the edge flange. By forming 6, it is possible to prevent wrinkles and distortion due to excess meat from occurring on the edge flange 6. Further, in the bending step, the wrinkle pressing margin 24 generated at the tip edge of the edge flange 6 is cut off as shown in FIGS. 23 and 24.

(Finishing process) Finally, the flange portion 25 near the boundary between the back flange 3 of the molding body 2 of the vehicle molding 1'and the end edge flange 6 of the molding end portion 4 is in a straightening mold (not shown). The back flange 3 and the edge flange 6 are straightened and finished in
And are connected in the same plane, and as a result, the vehicle molding 1 that is a product is obtained as shown in FIGS.

In the bending step, the flange portion 25 near the boundary between the back flange 3 and the edge flange 6 can be bent at the same time, in which case the finishing step is omitted. It

[0029]

As described above, according to the first aspect of the present invention.
According to this vehicle molding, it is possible to prevent wrinkles and distortions from occurring on the molding terminal portion, and to improve the appearance. Further, since the rigidity does not decrease with respect to the molding terminal portion, the durability is excellent. Further, according to the method for manufacturing a vehicle molding of the second aspect of the present invention, it is possible to easily manufacture a vehicle molding that is free from wrinkles and distortions and does not cause deterioration in rigidity with respect to the molding terminal portion.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a vehicle molding according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the same.

FIG. 3 is a perspective view showing the same from the front side.

FIG. 4 is a perspective view showing the same from the back side.

FIG. 5 is a perspective view showing a state where the same is attached to a vehicle body.

FIG. 6 is a perspective view showing a molding material.

FIG. 7 is a plan view showing a state where an end portion of the molding material is unfolded.

FIG. 8 is a side view of the same.

9 is a sectional view taken along line IX-IX in FIG.

10 is a cross-sectional view taken along line XX of FIG.

FIG. 11 is a cross-sectional view showing a simplified drawing press type device.

12 is a sectional view taken along line XII-XII in FIG.

13 is a sectional view taken along line XIII-XIII in FIG.

FIG. 14 is a cross-sectional view showing a state in which the upper die of the drawing press die apparatus is lowered to the bottom dead center.

15 is a sectional view taken along line XV-XV in FIG.

16 is a sectional view taken along line XVI-XVI of FIG.

FIG. 17 is a plan view showing a state where the expansion portion of the molding material has been drawn.

FIG. 18 is a side view of the same.

FIG. 19 is a cross-sectional view showing a bending press device.

FIG. 20 is an explanatory view showing a lower passive cam and a slide body of the bending press type device.

FIG. 21 is a cross-sectional view showing a state where the lower die of the bending press die apparatus is lowered to the bottom dead center.

FIG. 22 is an explanatory view showing a state where the edge flange is bent by the passive cam and the slide body of the bending press type device.

FIG. 23 is a plan view showing a molding in which a molding terminal portion is formed at the end of the molding body.

FIG. 24 is a side view of the same.

[Explanation of symbols]

 1 Wind Molding for Vehicles 2 Mold Body 3 Back Flange 4 Mold Terminal 5 End Wall 6 End Edge Flange 21 Mold Material 22 Expanding Part 23 Wrinkle Holding Allowance 31 Drawing Press Type Equipment 41 Bending Press Type Equipment

Claims (2)

[Claims] 1. A molding body part having a substantially C-shaped cross section having back flanges folded back to the back side on both sides in the width direction of a flat strip-shaped plate material, and formed continuously with the longitudinal ends of the molding body part. A molding for a vehicle integrally provided with a molded molding end portion, wherein the molding terminal portion is an end wall portion that is drawn so as to close a longitudinal end portion of the molding body portion, and the end wall portion. Is formed into a substantially bag-like shape with an end flange that is folded back to form the same surface as the back flange of the molding body. 2. A molding body which is formed in a substantially C-shaped cross section on both sides in the width direction of the flat strip-shaped plate material and has a back flange which is folded back to the back side, and is formed continuously with the longitudinal ends of the molding body. Is a method for manufacturing a vehicle molding integrally provided with a molded molding end portion, and is a long material having a substantially C-shaped cross section with a back flange on both sides in the width direction of a flat strip-shaped plate member folded back to the back side. A molding material forming step of forming a molding material including the molding body by cutting the molding into a dimension longer than the molding body by a predetermined length, and an end of a portion of the molding material corresponding to the molding body By expanding the back flange of the portion extended from the portion to expand the end portion of the molding material, and by drawing the expansion portion peripheral edge of the molding material as a wrinkle pressing margin, The mo A drawing step for forming an end wall part that closes the end part of the body part, and after cutting the wrinkle presser allowance generated in the drawing step, the tip part of the end wall part is bent inward to form the molding body part. By forming an edge flange that is flush with the back surface flange of the mold, a folding end that forms a substantially bag-like molding end portion with the end wall portion and the edge flange is continuously formed at the end portion of the molding body portion. A method of manufacturing a molding for a vehicle, comprising: a bending step.